diff --git a/go.mod b/go.mod index 25c9304d9..29cd7672a 100644 --- a/go.mod +++ b/go.mod @@ -22,6 +22,7 @@ require ( ) require ( + cloud.google.com/go/compute/metadata v0.3.0 // indirect github.com/Azure/azure-sdk-for-go/sdk/internal v1.5.2 // indirect github.com/Microsoft/go-winio v0.4.14 // indirect github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect @@ -56,6 +57,7 @@ require ( golang.org/x/crypto v0.25.0 // indirect golang.org/x/exp v0.0.0-20240529005216-23cca8864a10 // indirect golang.org/x/net v0.25.0 // indirect + golang.org/x/oauth2 v0.23.0 // indirect golang.org/x/sys v0.22.0 // indirect golang.org/x/term v0.22.0 // indirect golang.org/x/text v0.16.0 // indirect diff --git a/go.sum b/go.sum index cefe4c034..bc12243e0 100644 --- a/go.sum +++ b/go.sum @@ -1,3 +1,5 @@ +cloud.google.com/go/compute/metadata v0.3.0 h1:Tz+eQXMEqDIKRsmY3cHTL6FVaynIjX2QxYC4trgAKZc= +cloud.google.com/go/compute/metadata v0.3.0/go.mod h1:zFmK7XCadkQkj6TtorcaGlCW1hT1fIilQDwofLpJ20k= github.com/Azure/azure-sdk-for-go/sdk/azcore v1.10.0 h1:n1DH8TPV4qqPTje2RcUBYwtrTWlabVp4n46+74X2pn4= github.com/Azure/azure-sdk-for-go/sdk/azcore v1.10.0/go.mod h1:HDcZnuGbiyppErN6lB+idp4CKhjbc8gwjto6OPpyggM= github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.5.1 h1:sO0/P7g68FrryJzljemN+6GTssUXdANk6aJ7T1ZxnsQ= @@ -177,6 +179,8 @@ golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c= golang.org/x/net v0.25.0 h1:d/OCCoBEUq33pjydKrGQhw7IlUPI2Oylr+8qLx49kac= golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM= +golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs= +golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI= golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= diff --git a/packaging/conf/pbm-conf-reference.yml b/packaging/conf/pbm-conf-reference.yml index e0d99f689..f459ba473 100644 --- a/packaging/conf/pbm-conf-reference.yml +++ b/packaging/conf/pbm-conf-reference.yml @@ -11,28 +11,31 @@ #storage: ## Remote backup storage type. Supported types: S3, filesystem, azure - #---------------------S3 Storage Configuration-------------------------- # type: # s3: -## Specify the location and name of the bucket that you have configured on the S3 -# region: -# bucket: +## Specify the location and name of the bucket that you have configured on the S3 +# region: +# bucket: -## The data directory to store backups in. +## The data directory to store backups in. ## When undefined, backups are saved at the root of the bucket. -# prefix: +# prefix: ## The URL to access the bucket for GCS and MinIO -# endpointURL: +# endpointURL: + +## The service account used to access the GCS bucket. +## IF undefined, the "default" service account is used. +# serviceAccount: ## S3 access credentials. # credentials: -# access-key-id: +# access-key-id: # secret-access-key: -# session-token: +# session-token: ## The size of data chinks (in MB) to upload to the bucket. # uploadPartSize: 10 diff --git a/pbm/storage/s3/s3.go b/pbm/storage/s3/s3.go index 1bd7cea93..aceefad7b 100644 --- a/pbm/storage/s3/s3.go +++ b/pbm/storage/s3/s3.go @@ -25,6 +25,7 @@ import ( "github.com/aws/aws-sdk-go/service/s3" "github.com/aws/aws-sdk-go/service/s3/s3manager" "github.com/aws/aws-sdk-go/service/sts" + "golang.org/x/oauth2/google" "github.com/percona/percona-backup-mongodb/pbm/errors" "github.com/percona/percona-backup-mongodb/pbm/log" @@ -43,6 +44,7 @@ type Config struct { Provider string `bson:"provider,omitempty" json:"provider,omitempty" yaml:"provider,omitempty"` Region string `bson:"region" json:"region" yaml:"region"` EndpointURL string `bson:"endpointUrl,omitempty" json:"endpointUrl" yaml:"endpointUrl,omitempty"` + ServiceAccount string `bson:"serviceAccount,omitempty" json:"serviceAccount" yaml:"serviceAccount,omitempty"` ForcePathStyle *bool `bson:"forcePathStyle,omitempty" json:"forcePathStyle,omitempty" yaml:"forcePathStyle,omitempty"` Bucket string `bson:"bucket" json:"bucket" yaml:"bucket"` Prefix string `bson:"prefix,omitempty" json:"prefix,omitempty" yaml:"prefix,omitempty"` @@ -159,6 +161,9 @@ func (cfg *Config) Equal(other *Config) bool { if cfg.EndpointURL != other.EndpointURL { return false } + if cfg.ServiceAccount != other.ServiceAccount { + return false + } if cfg.Bucket != other.Bucket { return false } @@ -196,6 +201,9 @@ func (cfg *Config) Cast() error { if cfg.Region == "" { cfg.Region = defaultS3Region } + if cfg.ServiceAccount == "" { + cfg.ServiceAccount = "default" + } if cfg.ForcePathStyle == nil { cfg.ForcePathStyle = aws.Bool(true) } @@ -550,6 +558,20 @@ func (s *S3) session() (*session.Session, error) { }}) } + // If using GCE, attempt to retrieve access token from metadata server + if onGCE() { + tokenSource := google.ComputeTokenSource(s.opts.ServiceAccount, "") + token, err := tokenSource.Token() + if err != nil { + return nil, errors.Wrap(err, "get GCP token") + } + providers = append(providers, &credentials.StaticProvider{Value: credentials.Value{ + AccessKeyID: "GCP_OAUTH_TOKEN", + SecretAccessKey: "GCP_OATH_TOKEN", + SessionToken: token.AccessToken, + }}) + } + awsSession, err := session.NewSession() if err != nil { return nil, errors.Wrap(err, "new session") @@ -617,3 +639,24 @@ func awsLogger(l log.LogEvent) aws.Logger { l.Debug(msg, xs...) }) } + +func onGCE() bool { + client := http.Client{ + Timeout: 100 * time.Millisecond, + } + + req, err := http.NewRequest("GET", "http://169.254.169.254/computeMetadata/v1", nil) + if err != nil { + return false + } + + req.Header.Add("Metadata-Flavor", "Google") + + resp, err := client.Do(req) + if err != nil { + return false + } + defer resp.Body.Close() + + return resp.StatusCode == http.StatusOK +} diff --git a/vendor/cloud.google.com/go/compute/metadata/CHANGES.md b/vendor/cloud.google.com/go/compute/metadata/CHANGES.md new file mode 100644 index 000000000..967e06074 --- /dev/null +++ b/vendor/cloud.google.com/go/compute/metadata/CHANGES.md @@ -0,0 +1,26 @@ +# Changes + +## [0.3.0](https://github.com/googleapis/google-cloud-go/compare/compute/metadata/v0.2.3...compute/metadata/v0.3.0) (2024-04-15) + + +### Features + +* **compute/metadata:** Add context aware functions ([#9733](https://github.com/googleapis/google-cloud-go/issues/9733)) ([e4eb5b4](https://github.com/googleapis/google-cloud-go/commit/e4eb5b46ee2aec9d2fc18300bfd66015e25a0510)) + +## [0.2.3](https://github.com/googleapis/google-cloud-go/compare/compute/metadata/v0.2.2...compute/metadata/v0.2.3) (2022-12-15) + + +### Bug Fixes + +* **compute/metadata:** Switch DNS lookup to an absolute lookup ([119b410](https://github.com/googleapis/google-cloud-go/commit/119b41060c7895e45e48aee5621ad35607c4d021)), refs [#7165](https://github.com/googleapis/google-cloud-go/issues/7165) + +## [0.2.2](https://github.com/googleapis/google-cloud-go/compare/compute/metadata/v0.2.1...compute/metadata/v0.2.2) (2022-12-01) + + +### Bug Fixes + +* **compute/metadata:** Set IdleConnTimeout for http.Client ([#7084](https://github.com/googleapis/google-cloud-go/issues/7084)) ([766516a](https://github.com/googleapis/google-cloud-go/commit/766516aaf3816bfb3159efeea65aa3d1d205a3e2)), refs [#5430](https://github.com/googleapis/google-cloud-go/issues/5430) + +## [0.1.0] (2022-10-26) + +Initial release of metadata being it's own module. diff --git a/vendor/cloud.google.com/go/compute/metadata/LICENSE b/vendor/cloud.google.com/go/compute/metadata/LICENSE new file mode 100644 index 000000000..d64569567 --- /dev/null +++ b/vendor/cloud.google.com/go/compute/metadata/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/cloud.google.com/go/compute/metadata/README.md b/vendor/cloud.google.com/go/compute/metadata/README.md new file mode 100644 index 000000000..f940fb2c8 --- /dev/null +++ b/vendor/cloud.google.com/go/compute/metadata/README.md @@ -0,0 +1,27 @@ +# Compute API + +[![Go Reference](https://pkg.go.dev/badge/cloud.google.com/go/compute.svg)](https://pkg.go.dev/cloud.google.com/go/compute/metadata) + +This is a utility library for communicating with Google Cloud metadata service +on Google Cloud. + +## Install + +```bash +go get cloud.google.com/go/compute/metadata +``` + +## Go Version Support + +See the [Go Versions Supported](https://github.com/googleapis/google-cloud-go#go-versions-supported) +section in the root directory's README. + +## Contributing + +Contributions are welcome. Please, see the [CONTRIBUTING](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/main/CONTRIBUTING.md) +document for details. + +Please note that this project is released with a Contributor Code of Conduct. +By participating in this project you agree to abide by its terms. See +[Contributor Code of Conduct](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/main/CONTRIBUTING.md#contributor-code-of-conduct) +for more information. diff --git a/vendor/cloud.google.com/go/compute/metadata/metadata.go b/vendor/cloud.google.com/go/compute/metadata/metadata.go new file mode 100644 index 000000000..f67e3c7ee --- /dev/null +++ b/vendor/cloud.google.com/go/compute/metadata/metadata.go @@ -0,0 +1,579 @@ +// Copyright 2014 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package metadata provides access to Google Compute Engine (GCE) +// metadata and API service accounts. +// +// This package is a wrapper around the GCE metadata service, +// as documented at https://cloud.google.com/compute/docs/metadata/overview. +package metadata // import "cloud.google.com/go/compute/metadata" + +import ( + "context" + "encoding/json" + "fmt" + "io" + "net" + "net/http" + "net/url" + "os" + "runtime" + "strings" + "sync" + "time" +) + +const ( + // metadataIP is the documented metadata server IP address. + metadataIP = "169.254.169.254" + + // metadataHostEnv is the environment variable specifying the + // GCE metadata hostname. If empty, the default value of + // metadataIP ("169.254.169.254") is used instead. + // This is variable name is not defined by any spec, as far as + // I know; it was made up for the Go package. + metadataHostEnv = "GCE_METADATA_HOST" + + userAgent = "gcloud-golang/0.1" +) + +type cachedValue struct { + k string + trim bool + mu sync.Mutex + v string +} + +var ( + projID = &cachedValue{k: "project/project-id", trim: true} + projNum = &cachedValue{k: "project/numeric-project-id", trim: true} + instID = &cachedValue{k: "instance/id", trim: true} +) + +var defaultClient = &Client{hc: newDefaultHTTPClient()} + +func newDefaultHTTPClient() *http.Client { + return &http.Client{ + Transport: &http.Transport{ + Dial: (&net.Dialer{ + Timeout: 2 * time.Second, + KeepAlive: 30 * time.Second, + }).Dial, + IdleConnTimeout: 60 * time.Second, + }, + Timeout: 5 * time.Second, + } +} + +// NotDefinedError is returned when requested metadata is not defined. +// +// The underlying string is the suffix after "/computeMetadata/v1/". +// +// This error is not returned if the value is defined to be the empty +// string. +type NotDefinedError string + +func (suffix NotDefinedError) Error() string { + return fmt.Sprintf("metadata: GCE metadata %q not defined", string(suffix)) +} + +func (c *cachedValue) get(cl *Client) (v string, err error) { + defer c.mu.Unlock() + c.mu.Lock() + if c.v != "" { + return c.v, nil + } + if c.trim { + v, err = cl.getTrimmed(context.Background(), c.k) + } else { + v, err = cl.GetWithContext(context.Background(), c.k) + } + if err == nil { + c.v = v + } + return +} + +var ( + onGCEOnce sync.Once + onGCE bool +) + +// OnGCE reports whether this process is running on Google Compute Engine. +func OnGCE() bool { + onGCEOnce.Do(initOnGCE) + return onGCE +} + +func initOnGCE() { + onGCE = testOnGCE() +} + +func testOnGCE() bool { + // The user explicitly said they're on GCE, so trust them. + if os.Getenv(metadataHostEnv) != "" { + return true + } + + ctx, cancel := context.WithCancel(context.Background()) + defer cancel() + + resc := make(chan bool, 2) + + // Try two strategies in parallel. + // See https://github.com/googleapis/google-cloud-go/issues/194 + go func() { + req, _ := http.NewRequest("GET", "http://"+metadataIP, nil) + req.Header.Set("User-Agent", userAgent) + res, err := newDefaultHTTPClient().Do(req.WithContext(ctx)) + if err != nil { + resc <- false + return + } + defer res.Body.Close() + resc <- res.Header.Get("Metadata-Flavor") == "Google" + }() + + go func() { + resolver := &net.Resolver{} + addrs, err := resolver.LookupHost(ctx, "metadata.google.internal.") + if err != nil || len(addrs) == 0 { + resc <- false + return + } + resc <- strsContains(addrs, metadataIP) + }() + + tryHarder := systemInfoSuggestsGCE() + if tryHarder { + res := <-resc + if res { + // The first strategy succeeded, so let's use it. + return true + } + // Wait for either the DNS or metadata server probe to + // contradict the other one and say we are running on + // GCE. Give it a lot of time to do so, since the system + // info already suggests we're running on a GCE BIOS. + timer := time.NewTimer(5 * time.Second) + defer timer.Stop() + select { + case res = <-resc: + return res + case <-timer.C: + // Too slow. Who knows what this system is. + return false + } + } + + // There's no hint from the system info that we're running on + // GCE, so use the first probe's result as truth, whether it's + // true or false. The goal here is to optimize for speed for + // users who are NOT running on GCE. We can't assume that + // either a DNS lookup or an HTTP request to a blackholed IP + // address is fast. Worst case this should return when the + // metaClient's Transport.ResponseHeaderTimeout or + // Transport.Dial.Timeout fires (in two seconds). + return <-resc +} + +// systemInfoSuggestsGCE reports whether the local system (without +// doing network requests) suggests that we're running on GCE. If this +// returns true, testOnGCE tries a bit harder to reach its metadata +// server. +func systemInfoSuggestsGCE() bool { + if runtime.GOOS != "linux" { + // We don't have any non-Linux clues available, at least yet. + return false + } + slurp, _ := os.ReadFile("/sys/class/dmi/id/product_name") + name := strings.TrimSpace(string(slurp)) + return name == "Google" || name == "Google Compute Engine" +} + +// Subscribe calls Client.SubscribeWithContext on the default client. +func Subscribe(suffix string, fn func(v string, ok bool) error) error { + return defaultClient.SubscribeWithContext(context.Background(), suffix, func(ctx context.Context, v string, ok bool) error { return fn(v, ok) }) +} + +// SubscribeWithContext calls Client.SubscribeWithContext on the default client. +func SubscribeWithContext(ctx context.Context, suffix string, fn func(ctx context.Context, v string, ok bool) error) error { + return defaultClient.SubscribeWithContext(ctx, suffix, fn) +} + +// Get calls Client.GetWithContext on the default client. +// +// Deprecated: Please use the context aware variant [GetWithContext]. +func Get(suffix string) (string, error) { + return defaultClient.GetWithContext(context.Background(), suffix) +} + +// GetWithContext calls Client.GetWithContext on the default client. +func GetWithContext(ctx context.Context, suffix string) (string, error) { + return defaultClient.GetWithContext(ctx, suffix) +} + +// ProjectID returns the current instance's project ID string. +func ProjectID() (string, error) { return defaultClient.ProjectID() } + +// NumericProjectID returns the current instance's numeric project ID. +func NumericProjectID() (string, error) { return defaultClient.NumericProjectID() } + +// InternalIP returns the instance's primary internal IP address. +func InternalIP() (string, error) { return defaultClient.InternalIP() } + +// ExternalIP returns the instance's primary external (public) IP address. +func ExternalIP() (string, error) { return defaultClient.ExternalIP() } + +// Email calls Client.Email on the default client. +func Email(serviceAccount string) (string, error) { return defaultClient.Email(serviceAccount) } + +// Hostname returns the instance's hostname. This will be of the form +// ".c..internal". +func Hostname() (string, error) { return defaultClient.Hostname() } + +// InstanceTags returns the list of user-defined instance tags, +// assigned when initially creating a GCE instance. +func InstanceTags() ([]string, error) { return defaultClient.InstanceTags() } + +// InstanceID returns the current VM's numeric instance ID. +func InstanceID() (string, error) { return defaultClient.InstanceID() } + +// InstanceName returns the current VM's instance ID string. +func InstanceName() (string, error) { return defaultClient.InstanceName() } + +// Zone returns the current VM's zone, such as "us-central1-b". +func Zone() (string, error) { return defaultClient.Zone() } + +// InstanceAttributes calls Client.InstanceAttributes on the default client. +func InstanceAttributes() ([]string, error) { return defaultClient.InstanceAttributes() } + +// ProjectAttributes calls Client.ProjectAttributes on the default client. +func ProjectAttributes() ([]string, error) { return defaultClient.ProjectAttributes() } + +// InstanceAttributeValue calls Client.InstanceAttributeValue on the default client. +func InstanceAttributeValue(attr string) (string, error) { + return defaultClient.InstanceAttributeValue(attr) +} + +// ProjectAttributeValue calls Client.ProjectAttributeValue on the default client. +func ProjectAttributeValue(attr string) (string, error) { + return defaultClient.ProjectAttributeValue(attr) +} + +// Scopes calls Client.Scopes on the default client. +func Scopes(serviceAccount string) ([]string, error) { return defaultClient.Scopes(serviceAccount) } + +func strsContains(ss []string, s string) bool { + for _, v := range ss { + if v == s { + return true + } + } + return false +} + +// A Client provides metadata. +type Client struct { + hc *http.Client +} + +// NewClient returns a Client that can be used to fetch metadata. +// Returns the client that uses the specified http.Client for HTTP requests. +// If nil is specified, returns the default client. +func NewClient(c *http.Client) *Client { + if c == nil { + return defaultClient + } + + return &Client{hc: c} +} + +// getETag returns a value from the metadata service as well as the associated ETag. +// This func is otherwise equivalent to Get. +func (c *Client) getETag(ctx context.Context, suffix string) (value, etag string, err error) { + // Using a fixed IP makes it very difficult to spoof the metadata service in + // a container, which is an important use-case for local testing of cloud + // deployments. To enable spoofing of the metadata service, the environment + // variable GCE_METADATA_HOST is first inspected to decide where metadata + // requests shall go. + host := os.Getenv(metadataHostEnv) + if host == "" { + // Using 169.254.169.254 instead of "metadata" here because Go + // binaries built with the "netgo" tag and without cgo won't + // know the search suffix for "metadata" is + // ".google.internal", and this IP address is documented as + // being stable anyway. + host = metadataIP + } + suffix = strings.TrimLeft(suffix, "/") + u := "http://" + host + "/computeMetadata/v1/" + suffix + req, err := http.NewRequestWithContext(ctx, "GET", u, nil) + if err != nil { + return "", "", err + } + req.Header.Set("Metadata-Flavor", "Google") + req.Header.Set("User-Agent", userAgent) + var res *http.Response + var reqErr error + retryer := newRetryer() + for { + res, reqErr = c.hc.Do(req) + var code int + if res != nil { + code = res.StatusCode + } + if delay, shouldRetry := retryer.Retry(code, reqErr); shouldRetry { + if err := sleep(ctx, delay); err != nil { + return "", "", err + } + continue + } + break + } + if reqErr != nil { + return "", "", reqErr + } + defer res.Body.Close() + if res.StatusCode == http.StatusNotFound { + return "", "", NotDefinedError(suffix) + } + all, err := io.ReadAll(res.Body) + if err != nil { + return "", "", err + } + if res.StatusCode != 200 { + return "", "", &Error{Code: res.StatusCode, Message: string(all)} + } + return string(all), res.Header.Get("Etag"), nil +} + +// Get returns a value from the metadata service. +// The suffix is appended to "http://${GCE_METADATA_HOST}/computeMetadata/v1/". +// +// If the GCE_METADATA_HOST environment variable is not defined, a default of +// 169.254.169.254 will be used instead. +// +// If the requested metadata is not defined, the returned error will +// be of type NotDefinedError. +// +// Deprecated: Please use the context aware variant [Client.GetWithContext]. +func (c *Client) Get(suffix string) (string, error) { + return c.GetWithContext(context.Background(), suffix) +} + +// GetWithContext returns a value from the metadata service. +// The suffix is appended to "http://${GCE_METADATA_HOST}/computeMetadata/v1/". +// +// If the GCE_METADATA_HOST environment variable is not defined, a default of +// 169.254.169.254 will be used instead. +// +// If the requested metadata is not defined, the returned error will +// be of type NotDefinedError. +func (c *Client) GetWithContext(ctx context.Context, suffix string) (string, error) { + val, _, err := c.getETag(ctx, suffix) + return val, err +} + +func (c *Client) getTrimmed(ctx context.Context, suffix string) (s string, err error) { + s, err = c.GetWithContext(ctx, suffix) + s = strings.TrimSpace(s) + return +} + +func (c *Client) lines(suffix string) ([]string, error) { + j, err := c.GetWithContext(context.Background(), suffix) + if err != nil { + return nil, err + } + s := strings.Split(strings.TrimSpace(j), "\n") + for i := range s { + s[i] = strings.TrimSpace(s[i]) + } + return s, nil +} + +// ProjectID returns the current instance's project ID string. +func (c *Client) ProjectID() (string, error) { return projID.get(c) } + +// NumericProjectID returns the current instance's numeric project ID. +func (c *Client) NumericProjectID() (string, error) { return projNum.get(c) } + +// InstanceID returns the current VM's numeric instance ID. +func (c *Client) InstanceID() (string, error) { return instID.get(c) } + +// InternalIP returns the instance's primary internal IP address. +func (c *Client) InternalIP() (string, error) { + return c.getTrimmed(context.Background(), "instance/network-interfaces/0/ip") +} + +// Email returns the email address associated with the service account. +// The account may be empty or the string "default" to use the instance's +// main account. +func (c *Client) Email(serviceAccount string) (string, error) { + if serviceAccount == "" { + serviceAccount = "default" + } + return c.getTrimmed(context.Background(), "instance/service-accounts/"+serviceAccount+"/email") +} + +// ExternalIP returns the instance's primary external (public) IP address. +func (c *Client) ExternalIP() (string, error) { + return c.getTrimmed(context.Background(), "instance/network-interfaces/0/access-configs/0/external-ip") +} + +// Hostname returns the instance's hostname. This will be of the form +// ".c..internal". +func (c *Client) Hostname() (string, error) { + return c.getTrimmed(context.Background(), "instance/hostname") +} + +// InstanceTags returns the list of user-defined instance tags, +// assigned when initially creating a GCE instance. +func (c *Client) InstanceTags() ([]string, error) { + var s []string + j, err := c.GetWithContext(context.Background(), "instance/tags") + if err != nil { + return nil, err + } + if err := json.NewDecoder(strings.NewReader(j)).Decode(&s); err != nil { + return nil, err + } + return s, nil +} + +// InstanceName returns the current VM's instance ID string. +func (c *Client) InstanceName() (string, error) { + return c.getTrimmed(context.Background(), "instance/name") +} + +// Zone returns the current VM's zone, such as "us-central1-b". +func (c *Client) Zone() (string, error) { + zone, err := c.getTrimmed(context.Background(), "instance/zone") + // zone is of the form "projects//zones/". + if err != nil { + return "", err + } + return zone[strings.LastIndex(zone, "/")+1:], nil +} + +// InstanceAttributes returns the list of user-defined attributes, +// assigned when initially creating a GCE VM instance. The value of an +// attribute can be obtained with InstanceAttributeValue. +func (c *Client) InstanceAttributes() ([]string, error) { return c.lines("instance/attributes/") } + +// ProjectAttributes returns the list of user-defined attributes +// applying to the project as a whole, not just this VM. The value of +// an attribute can be obtained with ProjectAttributeValue. +func (c *Client) ProjectAttributes() ([]string, error) { return c.lines("project/attributes/") } + +// InstanceAttributeValue returns the value of the provided VM +// instance attribute. +// +// If the requested attribute is not defined, the returned error will +// be of type NotDefinedError. +// +// InstanceAttributeValue may return ("", nil) if the attribute was +// defined to be the empty string. +func (c *Client) InstanceAttributeValue(attr string) (string, error) { + return c.GetWithContext(context.Background(), "instance/attributes/"+attr) +} + +// ProjectAttributeValue returns the value of the provided +// project attribute. +// +// If the requested attribute is not defined, the returned error will +// be of type NotDefinedError. +// +// ProjectAttributeValue may return ("", nil) if the attribute was +// defined to be the empty string. +func (c *Client) ProjectAttributeValue(attr string) (string, error) { + return c.GetWithContext(context.Background(), "project/attributes/"+attr) +} + +// Scopes returns the service account scopes for the given account. +// The account may be empty or the string "default" to use the instance's +// main account. +func (c *Client) Scopes(serviceAccount string) ([]string, error) { + if serviceAccount == "" { + serviceAccount = "default" + } + return c.lines("instance/service-accounts/" + serviceAccount + "/scopes") +} + +// Subscribe subscribes to a value from the metadata service. +// The suffix is appended to "http://${GCE_METADATA_HOST}/computeMetadata/v1/". +// The suffix may contain query parameters. +// +// Deprecated: Please use the context aware variant [Client.SubscribeWithContext]. +func (c *Client) Subscribe(suffix string, fn func(v string, ok bool) error) error { + return c.SubscribeWithContext(context.Background(), suffix, func(ctx context.Context, v string, ok bool) error { return fn(v, ok) }) +} + +// SubscribeWithContext subscribes to a value from the metadata service. +// The suffix is appended to "http://${GCE_METADATA_HOST}/computeMetadata/v1/". +// The suffix may contain query parameters. +// +// SubscribeWithContext calls fn with the latest metadata value indicated by the +// provided suffix. If the metadata value is deleted, fn is called with the +// empty string and ok false. Subscribe blocks until fn returns a non-nil error +// or the value is deleted. Subscribe returns the error value returned from the +// last call to fn, which may be nil when ok == false. +func (c *Client) SubscribeWithContext(ctx context.Context, suffix string, fn func(ctx context.Context, v string, ok bool) error) error { + const failedSubscribeSleep = time.Second * 5 + + // First check to see if the metadata value exists at all. + val, lastETag, err := c.getETag(ctx, suffix) + if err != nil { + return err + } + + if err := fn(ctx, val, true); err != nil { + return err + } + + ok := true + if strings.ContainsRune(suffix, '?') { + suffix += "&wait_for_change=true&last_etag=" + } else { + suffix += "?wait_for_change=true&last_etag=" + } + for { + val, etag, err := c.getETag(ctx, suffix+url.QueryEscape(lastETag)) + if err != nil { + if _, deleted := err.(NotDefinedError); !deleted { + time.Sleep(failedSubscribeSleep) + continue // Retry on other errors. + } + ok = false + } + lastETag = etag + + if err := fn(ctx, val, ok); err != nil || !ok { + return err + } + } +} + +// Error contains an error response from the server. +type Error struct { + // Code is the HTTP response status code. + Code int + // Message is the server response message. + Message string +} + +func (e *Error) Error() string { + return fmt.Sprintf("compute: Received %d `%s`", e.Code, e.Message) +} diff --git a/vendor/cloud.google.com/go/compute/metadata/retry.go b/vendor/cloud.google.com/go/compute/metadata/retry.go new file mode 100644 index 000000000..3d4bc75dd --- /dev/null +++ b/vendor/cloud.google.com/go/compute/metadata/retry.go @@ -0,0 +1,114 @@ +// Copyright 2021 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package metadata + +import ( + "context" + "io" + "math/rand" + "net/http" + "time" +) + +const ( + maxRetryAttempts = 5 +) + +var ( + syscallRetryable = func(error) bool { return false } +) + +// defaultBackoff is basically equivalent to gax.Backoff without the need for +// the dependency. +type defaultBackoff struct { + max time.Duration + mul float64 + cur time.Duration +} + +func (b *defaultBackoff) Pause() time.Duration { + d := time.Duration(1 + rand.Int63n(int64(b.cur))) + b.cur = time.Duration(float64(b.cur) * b.mul) + if b.cur > b.max { + b.cur = b.max + } + return d +} + +// sleep is the equivalent of gax.Sleep without the need for the dependency. +func sleep(ctx context.Context, d time.Duration) error { + t := time.NewTimer(d) + select { + case <-ctx.Done(): + t.Stop() + return ctx.Err() + case <-t.C: + return nil + } +} + +func newRetryer() *metadataRetryer { + return &metadataRetryer{bo: &defaultBackoff{ + cur: 100 * time.Millisecond, + max: 30 * time.Second, + mul: 2, + }} +} + +type backoff interface { + Pause() time.Duration +} + +type metadataRetryer struct { + bo backoff + attempts int +} + +func (r *metadataRetryer) Retry(status int, err error) (time.Duration, bool) { + if status == http.StatusOK { + return 0, false + } + retryOk := shouldRetry(status, err) + if !retryOk { + return 0, false + } + if r.attempts == maxRetryAttempts { + return 0, false + } + r.attempts++ + return r.bo.Pause(), true +} + +func shouldRetry(status int, err error) bool { + if 500 <= status && status <= 599 { + return true + } + if err == io.ErrUnexpectedEOF { + return true + } + // Transient network errors should be retried. + if syscallRetryable(err) { + return true + } + if err, ok := err.(interface{ Temporary() bool }); ok { + if err.Temporary() { + return true + } + } + if err, ok := err.(interface{ Unwrap() error }); ok { + return shouldRetry(status, err.Unwrap()) + } + return false +} diff --git a/vendor/cloud.google.com/go/compute/metadata/retry_linux.go b/vendor/cloud.google.com/go/compute/metadata/retry_linux.go new file mode 100644 index 000000000..bb412f891 --- /dev/null +++ b/vendor/cloud.google.com/go/compute/metadata/retry_linux.go @@ -0,0 +1,26 @@ +// Copyright 2021 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +//go:build linux +// +build linux + +package metadata + +import "syscall" + +func init() { + // Initialize syscallRetryable to return true on transient socket-level + // errors. These errors are specific to Linux. + syscallRetryable = func(err error) bool { return err == syscall.ECONNRESET || err == syscall.ECONNREFUSED } +} diff --git a/vendor/golang.org/x/oauth2/.travis.yml b/vendor/golang.org/x/oauth2/.travis.yml new file mode 100644 index 000000000..fa139db22 --- /dev/null +++ b/vendor/golang.org/x/oauth2/.travis.yml @@ -0,0 +1,13 @@ +language: go + +go: + - tip + +install: + - export GOPATH="$HOME/gopath" + - mkdir -p "$GOPATH/src/golang.org/x" + - mv "$TRAVIS_BUILD_DIR" "$GOPATH/src/golang.org/x/oauth2" + - go get -v -t -d golang.org/x/oauth2/... + +script: + - go test -v golang.org/x/oauth2/... diff --git a/vendor/golang.org/x/oauth2/CONTRIBUTING.md b/vendor/golang.org/x/oauth2/CONTRIBUTING.md new file mode 100644 index 000000000..dfbed62cf --- /dev/null +++ b/vendor/golang.org/x/oauth2/CONTRIBUTING.md @@ -0,0 +1,26 @@ +# Contributing to Go + +Go is an open source project. + +It is the work of hundreds of contributors. We appreciate your help! + +## Filing issues + +When [filing an issue](https://github.com/golang/oauth2/issues), make sure to answer these five questions: + +1. What version of Go are you using (`go version`)? +2. What operating system and processor architecture are you using? +3. What did you do? +4. What did you expect to see? +5. What did you see instead? + +General questions should go to the [golang-nuts mailing list](https://groups.google.com/group/golang-nuts) instead of the issue tracker. +The gophers there will answer or ask you to file an issue if you've tripped over a bug. + +## Contributing code + +Please read the [Contribution Guidelines](https://golang.org/doc/contribute.html) +before sending patches. + +Unless otherwise noted, the Go source files are distributed under +the BSD-style license found in the LICENSE file. diff --git a/vendor/golang.org/x/oauth2/LICENSE b/vendor/golang.org/x/oauth2/LICENSE new file mode 100644 index 000000000..2a7cf70da --- /dev/null +++ b/vendor/golang.org/x/oauth2/LICENSE @@ -0,0 +1,27 @@ +Copyright 2009 The Go Authors. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google LLC nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/golang.org/x/oauth2/README.md b/vendor/golang.org/x/oauth2/README.md new file mode 100644 index 000000000..781770c20 --- /dev/null +++ b/vendor/golang.org/x/oauth2/README.md @@ -0,0 +1,40 @@ +# OAuth2 for Go + +[![Go Reference](https://pkg.go.dev/badge/golang.org/x/oauth2.svg)](https://pkg.go.dev/golang.org/x/oauth2) +[![Build Status](https://travis-ci.org/golang/oauth2.svg?branch=master)](https://travis-ci.org/golang/oauth2) + +oauth2 package contains a client implementation for OAuth 2.0 spec. + +## Installation + +~~~~ +go get golang.org/x/oauth2 +~~~~ + +Or you can manually git clone the repository to +`$(go env GOPATH)/src/golang.org/x/oauth2`. + +See pkg.go.dev for further documentation and examples. + +* [pkg.go.dev/golang.org/x/oauth2](https://pkg.go.dev/golang.org/x/oauth2) +* [pkg.go.dev/golang.org/x/oauth2/google](https://pkg.go.dev/golang.org/x/oauth2/google) + +## Policy for new endpoints + +We no longer accept new provider-specific packages in this repo if all +they do is add a single endpoint variable. If you just want to add a +single endpoint, add it to the +[pkg.go.dev/golang.org/x/oauth2/endpoints](https://pkg.go.dev/golang.org/x/oauth2/endpoints) +package. + +## Report Issues / Send Patches + +The main issue tracker for the oauth2 repository is located at +https://github.com/golang/oauth2/issues. + +This repository uses Gerrit for code changes. To learn how to submit changes to +this repository, see https://golang.org/doc/contribute.html. In particular: + +* Excluding trivial changes, all contributions should be connected to an existing issue. +* API changes must go through the [change proposal process](https://go.dev/s/proposal-process) before they can be accepted. +* The code owners are listed at [dev.golang.org/owners](https://dev.golang.org/owners#:~:text=x/oauth2). diff --git a/vendor/golang.org/x/oauth2/authhandler/authhandler.go b/vendor/golang.org/x/oauth2/authhandler/authhandler.go new file mode 100644 index 000000000..9bc6cd7bc --- /dev/null +++ b/vendor/golang.org/x/oauth2/authhandler/authhandler.go @@ -0,0 +1,94 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package authhandler implements a TokenSource to support +// "three-legged OAuth 2.0" via a custom AuthorizationHandler. +package authhandler + +import ( + "context" + "errors" + + "golang.org/x/oauth2" +) + +const ( + // Parameter keys for AuthCodeURL method to support PKCE. + codeChallengeKey = "code_challenge" + codeChallengeMethodKey = "code_challenge_method" + + // Parameter key for Exchange method to support PKCE. + codeVerifierKey = "code_verifier" +) + +// PKCEParams holds parameters to support PKCE. +type PKCEParams struct { + Challenge string // The unpadded, base64-url-encoded string of the encrypted code verifier. + ChallengeMethod string // The encryption method (ex. S256). + Verifier string // The original, non-encrypted secret. +} + +// AuthorizationHandler is a 3-legged-OAuth helper that prompts +// the user for OAuth consent at the specified auth code URL +// and returns an auth code and state upon approval. +type AuthorizationHandler func(authCodeURL string) (code string, state string, err error) + +// TokenSourceWithPKCE is an enhanced version of TokenSource with PKCE support. +// +// The pkce parameter supports PKCE flow, which uses code challenge and code verifier +// to prevent CSRF attacks. A unique code challenge and code verifier should be generated +// by the caller at runtime. See https://www.oauth.com/oauth2-servers/pkce/ for more info. +func TokenSourceWithPKCE(ctx context.Context, config *oauth2.Config, state string, authHandler AuthorizationHandler, pkce *PKCEParams) oauth2.TokenSource { + return oauth2.ReuseTokenSource(nil, authHandlerSource{config: config, ctx: ctx, authHandler: authHandler, state: state, pkce: pkce}) +} + +// TokenSource returns an oauth2.TokenSource that fetches access tokens +// using 3-legged-OAuth flow. +// +// The provided context.Context is used for oauth2 Exchange operation. +// +// The provided oauth2.Config should be a full configuration containing AuthURL, +// TokenURL, and Scope. +// +// An environment-specific AuthorizationHandler is used to obtain user consent. +// +// Per the OAuth protocol, a unique "state" string should be specified here. +// This token source will verify that the "state" is identical in the request +// and response before exchanging the auth code for OAuth token to prevent CSRF +// attacks. +func TokenSource(ctx context.Context, config *oauth2.Config, state string, authHandler AuthorizationHandler) oauth2.TokenSource { + return TokenSourceWithPKCE(ctx, config, state, authHandler, nil) +} + +type authHandlerSource struct { + ctx context.Context + config *oauth2.Config + authHandler AuthorizationHandler + state string + pkce *PKCEParams +} + +func (source authHandlerSource) Token() (*oauth2.Token, error) { + // Step 1: Obtain auth code. + var authCodeUrlOptions []oauth2.AuthCodeOption + if source.pkce != nil && source.pkce.Challenge != "" && source.pkce.ChallengeMethod != "" { + authCodeUrlOptions = []oauth2.AuthCodeOption{oauth2.SetAuthURLParam(codeChallengeKey, source.pkce.Challenge), + oauth2.SetAuthURLParam(codeChallengeMethodKey, source.pkce.ChallengeMethod)} + } + url := source.config.AuthCodeURL(source.state, authCodeUrlOptions...) + code, state, err := source.authHandler(url) + if err != nil { + return nil, err + } + if state != source.state { + return nil, errors.New("state mismatch in 3-legged-OAuth flow") + } + + // Step 2: Exchange auth code for access token. + var exchangeOptions []oauth2.AuthCodeOption + if source.pkce != nil && source.pkce.Verifier != "" { + exchangeOptions = []oauth2.AuthCodeOption{oauth2.SetAuthURLParam(codeVerifierKey, source.pkce.Verifier)} + } + return source.config.Exchange(source.ctx, code, exchangeOptions...) +} diff --git a/vendor/golang.org/x/oauth2/deviceauth.go b/vendor/golang.org/x/oauth2/deviceauth.go new file mode 100644 index 000000000..e99c92f39 --- /dev/null +++ b/vendor/golang.org/x/oauth2/deviceauth.go @@ -0,0 +1,198 @@ +package oauth2 + +import ( + "context" + "encoding/json" + "errors" + "fmt" + "io" + "net/http" + "net/url" + "strings" + "time" + + "golang.org/x/oauth2/internal" +) + +// https://datatracker.ietf.org/doc/html/rfc8628#section-3.5 +const ( + errAuthorizationPending = "authorization_pending" + errSlowDown = "slow_down" + errAccessDenied = "access_denied" + errExpiredToken = "expired_token" +) + +// DeviceAuthResponse describes a successful RFC 8628 Device Authorization Response +// https://datatracker.ietf.org/doc/html/rfc8628#section-3.2 +type DeviceAuthResponse struct { + // DeviceCode + DeviceCode string `json:"device_code"` + // UserCode is the code the user should enter at the verification uri + UserCode string `json:"user_code"` + // VerificationURI is where user should enter the user code + VerificationURI string `json:"verification_uri"` + // VerificationURIComplete (if populated) includes the user code in the verification URI. This is typically shown to the user in non-textual form, such as a QR code. + VerificationURIComplete string `json:"verification_uri_complete,omitempty"` + // Expiry is when the device code and user code expire + Expiry time.Time `json:"expires_in,omitempty"` + // Interval is the duration in seconds that Poll should wait between requests + Interval int64 `json:"interval,omitempty"` +} + +func (d DeviceAuthResponse) MarshalJSON() ([]byte, error) { + type Alias DeviceAuthResponse + var expiresIn int64 + if !d.Expiry.IsZero() { + expiresIn = int64(time.Until(d.Expiry).Seconds()) + } + return json.Marshal(&struct { + ExpiresIn int64 `json:"expires_in,omitempty"` + *Alias + }{ + ExpiresIn: expiresIn, + Alias: (*Alias)(&d), + }) + +} + +func (c *DeviceAuthResponse) UnmarshalJSON(data []byte) error { + type Alias DeviceAuthResponse + aux := &struct { + ExpiresIn int64 `json:"expires_in"` + // workaround misspelling of verification_uri + VerificationURL string `json:"verification_url"` + *Alias + }{ + Alias: (*Alias)(c), + } + if err := json.Unmarshal(data, &aux); err != nil { + return err + } + if aux.ExpiresIn != 0 { + c.Expiry = time.Now().UTC().Add(time.Second * time.Duration(aux.ExpiresIn)) + } + if c.VerificationURI == "" { + c.VerificationURI = aux.VerificationURL + } + return nil +} + +// DeviceAuth returns a device auth struct which contains a device code +// and authorization information provided for users to enter on another device. +func (c *Config) DeviceAuth(ctx context.Context, opts ...AuthCodeOption) (*DeviceAuthResponse, error) { + // https://datatracker.ietf.org/doc/html/rfc8628#section-3.1 + v := url.Values{ + "client_id": {c.ClientID}, + } + if len(c.Scopes) > 0 { + v.Set("scope", strings.Join(c.Scopes, " ")) + } + for _, opt := range opts { + opt.setValue(v) + } + return retrieveDeviceAuth(ctx, c, v) +} + +func retrieveDeviceAuth(ctx context.Context, c *Config, v url.Values) (*DeviceAuthResponse, error) { + if c.Endpoint.DeviceAuthURL == "" { + return nil, errors.New("endpoint missing DeviceAuthURL") + } + + req, err := http.NewRequest("POST", c.Endpoint.DeviceAuthURL, strings.NewReader(v.Encode())) + if err != nil { + return nil, err + } + req.Header.Set("Content-Type", "application/x-www-form-urlencoded") + req.Header.Set("Accept", "application/json") + + t := time.Now() + r, err := internal.ContextClient(ctx).Do(req) + if err != nil { + return nil, err + } + + body, err := io.ReadAll(io.LimitReader(r.Body, 1<<20)) + if err != nil { + return nil, fmt.Errorf("oauth2: cannot auth device: %v", err) + } + if code := r.StatusCode; code < 200 || code > 299 { + return nil, &RetrieveError{ + Response: r, + Body: body, + } + } + + da := &DeviceAuthResponse{} + err = json.Unmarshal(body, &da) + if err != nil { + return nil, fmt.Errorf("unmarshal %s", err) + } + + if !da.Expiry.IsZero() { + // Make a small adjustment to account for time taken by the request + da.Expiry = da.Expiry.Add(-time.Since(t)) + } + + return da, nil +} + +// DeviceAccessToken polls the server to exchange a device code for a token. +func (c *Config) DeviceAccessToken(ctx context.Context, da *DeviceAuthResponse, opts ...AuthCodeOption) (*Token, error) { + if !da.Expiry.IsZero() { + var cancel context.CancelFunc + ctx, cancel = context.WithDeadline(ctx, da.Expiry) + defer cancel() + } + + // https://datatracker.ietf.org/doc/html/rfc8628#section-3.4 + v := url.Values{ + "client_id": {c.ClientID}, + "grant_type": {"urn:ietf:params:oauth:grant-type:device_code"}, + "device_code": {da.DeviceCode}, + } + if len(c.Scopes) > 0 { + v.Set("scope", strings.Join(c.Scopes, " ")) + } + for _, opt := range opts { + opt.setValue(v) + } + + // "If no value is provided, clients MUST use 5 as the default." + // https://datatracker.ietf.org/doc/html/rfc8628#section-3.2 + interval := da.Interval + if interval == 0 { + interval = 5 + } + + ticker := time.NewTicker(time.Duration(interval) * time.Second) + defer ticker.Stop() + for { + select { + case <-ctx.Done(): + return nil, ctx.Err() + case <-ticker.C: + tok, err := retrieveToken(ctx, c, v) + if err == nil { + return tok, nil + } + + e, ok := err.(*RetrieveError) + if !ok { + return nil, err + } + switch e.ErrorCode { + case errSlowDown: + // https://datatracker.ietf.org/doc/html/rfc8628#section-3.5 + // "the interval MUST be increased by 5 seconds for this and all subsequent requests" + interval += 5 + ticker.Reset(time.Duration(interval) * time.Second) + case errAuthorizationPending: + // Do nothing. + case errAccessDenied, errExpiredToken: + fallthrough + default: + return tok, err + } + } + } +} diff --git a/vendor/golang.org/x/oauth2/google/appengine.go b/vendor/golang.org/x/oauth2/google/appengine.go new file mode 100644 index 000000000..564920bd4 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/appengine.go @@ -0,0 +1,40 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package google + +import ( + "context" + "log" + "sync" + + "golang.org/x/oauth2" +) + +var logOnce sync.Once // only spam about deprecation once + +// AppEngineTokenSource returns a token source that fetches tokens from either +// the current application's service account or from the metadata server, +// depending on the App Engine environment. See below for environment-specific +// details. If you are implementing a 3-legged OAuth 2.0 flow on App Engine that +// involves user accounts, see oauth2.Config instead. +// +// The current version of this library requires at least Go 1.17 to build, +// so first generation App Engine runtimes (<= Go 1.9) are unsupported. +// Previously, on first generation App Engine runtimes, AppEngineTokenSource +// returned a token source that fetches tokens issued to the +// current App Engine application's service account. The provided context must have +// come from appengine.NewContext. +// +// Second generation App Engine runtimes (>= Go 1.11) and App Engine flexible: +// AppEngineTokenSource is DEPRECATED on second generation runtimes and on the +// flexible environment. It delegates to ComputeTokenSource, and the provided +// context and scopes are not used. Please use DefaultTokenSource (or ComputeTokenSource, +// which DefaultTokenSource will use in this case) instead. +func AppEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource { + logOnce.Do(func() { + log.Print("google: AppEngineTokenSource is deprecated on App Engine standard second generation runtimes (>= Go 1.11) and App Engine flexible. Please use DefaultTokenSource or ComputeTokenSource.") + }) + return ComputeTokenSource("") +} diff --git a/vendor/golang.org/x/oauth2/google/default.go b/vendor/golang.org/x/oauth2/google/default.go new file mode 100644 index 000000000..df958359a --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/default.go @@ -0,0 +1,317 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package google + +import ( + "context" + "encoding/json" + "fmt" + "net/http" + "os" + "path/filepath" + "runtime" + "sync" + "time" + + "cloud.google.com/go/compute/metadata" + "golang.org/x/oauth2" + "golang.org/x/oauth2/authhandler" +) + +const ( + adcSetupURL = "https://cloud.google.com/docs/authentication/external/set-up-adc" + defaultUniverseDomain = "googleapis.com" +) + +// Credentials holds Google credentials, including "Application Default Credentials". +// For more details, see: +// https://developers.google.com/accounts/docs/application-default-credentials +// Credentials from external accounts (workload identity federation) are used to +// identify a particular application from an on-prem or non-Google Cloud platform +// including Amazon Web Services (AWS), Microsoft Azure or any identity provider +// that supports OpenID Connect (OIDC). +type Credentials struct { + ProjectID string // may be empty + TokenSource oauth2.TokenSource + + // JSON contains the raw bytes from a JSON credentials file. + // This field may be nil if authentication is provided by the + // environment and not with a credentials file, e.g. when code is + // running on Google Cloud Platform. + JSON []byte + + // UniverseDomainProvider returns the default service domain for a given + // Cloud universe. Optional. + // + // On GCE, UniverseDomainProvider should return the universe domain value + // from Google Compute Engine (GCE)'s metadata server. See also [The attached service + // account](https://cloud.google.com/docs/authentication/application-default-credentials#attached-sa). + // If the GCE metadata server returns a 404 error, the default universe + // domain value should be returned. If the GCE metadata server returns an + // error other than 404, the error should be returned. + UniverseDomainProvider func() (string, error) + + udMu sync.Mutex // guards universeDomain + // universeDomain is the default service domain for a given Cloud universe. + universeDomain string +} + +// UniverseDomain returns the default service domain for a given Cloud universe. +// +// The default value is "googleapis.com". +// +// Deprecated: Use instead (*Credentials).GetUniverseDomain(), which supports +// obtaining the universe domain when authenticating via the GCE metadata server. +// Unlike GetUniverseDomain, this method, UniverseDomain, will always return the +// default value when authenticating via the GCE metadata server. +// See also [The attached service account](https://cloud.google.com/docs/authentication/application-default-credentials#attached-sa). +func (c *Credentials) UniverseDomain() string { + if c.universeDomain == "" { + return defaultUniverseDomain + } + return c.universeDomain +} + +// GetUniverseDomain returns the default service domain for a given Cloud +// universe. If present, UniverseDomainProvider will be invoked and its return +// value will be cached. +// +// The default value is "googleapis.com". +func (c *Credentials) GetUniverseDomain() (string, error) { + c.udMu.Lock() + defer c.udMu.Unlock() + if c.universeDomain == "" && c.UniverseDomainProvider != nil { + // On Google Compute Engine, an App Engine standard second generation + // runtime, or App Engine flexible, use an externally provided function + // to request the universe domain from the metadata server. + ud, err := c.UniverseDomainProvider() + if err != nil { + return "", err + } + c.universeDomain = ud + } + // If no UniverseDomainProvider (meaning not on Google Compute Engine), or + // in case of any (non-error) empty return value from + // UniverseDomainProvider, set the default universe domain. + if c.universeDomain == "" { + c.universeDomain = defaultUniverseDomain + } + return c.universeDomain, nil +} + +// DefaultCredentials is the old name of Credentials. +// +// Deprecated: use Credentials instead. +type DefaultCredentials = Credentials + +// CredentialsParams holds user supplied parameters that are used together +// with a credentials file for building a Credentials object. +type CredentialsParams struct { + // Scopes is the list OAuth scopes. Required. + // Example: https://www.googleapis.com/auth/cloud-platform + Scopes []string + + // Subject is the user email used for domain wide delegation (see + // https://developers.google.com/identity/protocols/oauth2/service-account#delegatingauthority). + // Optional. + Subject string + + // AuthHandler is the AuthorizationHandler used for 3-legged OAuth flow. Required for 3LO flow. + AuthHandler authhandler.AuthorizationHandler + + // State is a unique string used with AuthHandler. Required for 3LO flow. + State string + + // PKCE is used to support PKCE flow. Optional for 3LO flow. + PKCE *authhandler.PKCEParams + + // The OAuth2 TokenURL default override. This value overrides the default TokenURL, + // unless explicitly specified by the credentials config file. Optional. + TokenURL string + + // EarlyTokenRefresh is the amount of time before a token expires that a new + // token will be preemptively fetched. If unset the default value is 10 + // seconds. + // + // Note: This option is currently only respected when using credentials + // fetched from the GCE metadata server. + EarlyTokenRefresh time.Duration + + // UniverseDomain is the default service domain for a given Cloud universe. + // Only supported in authentication flows that support universe domains. + // This value takes precedence over a universe domain explicitly specified + // in a credentials config file or by the GCE metadata server. Optional. + UniverseDomain string +} + +func (params CredentialsParams) deepCopy() CredentialsParams { + paramsCopy := params + paramsCopy.Scopes = make([]string, len(params.Scopes)) + copy(paramsCopy.Scopes, params.Scopes) + return paramsCopy +} + +// DefaultClient returns an HTTP Client that uses the +// DefaultTokenSource to obtain authentication credentials. +func DefaultClient(ctx context.Context, scope ...string) (*http.Client, error) { + ts, err := DefaultTokenSource(ctx, scope...) + if err != nil { + return nil, err + } + return oauth2.NewClient(ctx, ts), nil +} + +// DefaultTokenSource returns the token source for +// "Application Default Credentials". +// It is a shortcut for FindDefaultCredentials(ctx, scope).TokenSource. +func DefaultTokenSource(ctx context.Context, scope ...string) (oauth2.TokenSource, error) { + creds, err := FindDefaultCredentials(ctx, scope...) + if err != nil { + return nil, err + } + return creds.TokenSource, nil +} + +// FindDefaultCredentialsWithParams searches for "Application Default Credentials". +// +// It looks for credentials in the following places, +// preferring the first location found: +// +// 1. A JSON file whose path is specified by the +// GOOGLE_APPLICATION_CREDENTIALS environment variable. +// For workload identity federation, refer to +// https://cloud.google.com/iam/docs/how-to#using-workload-identity-federation on +// how to generate the JSON configuration file for on-prem/non-Google cloud +// platforms. +// 2. A JSON file in a location known to the gcloud command-line tool. +// On Windows, this is %APPDATA%/gcloud/application_default_credentials.json. +// On other systems, $HOME/.config/gcloud/application_default_credentials.json. +// 3. On Google Compute Engine, Google App Engine standard second generation runtimes +// (>= Go 1.11), and Google App Engine flexible environment, it fetches +// credentials from the metadata server. +func FindDefaultCredentialsWithParams(ctx context.Context, params CredentialsParams) (*Credentials, error) { + // Make defensive copy of the slices in params. + params = params.deepCopy() + + // First, try the environment variable. + const envVar = "GOOGLE_APPLICATION_CREDENTIALS" + if filename := os.Getenv(envVar); filename != "" { + creds, err := readCredentialsFile(ctx, filename, params) + if err != nil { + return nil, fmt.Errorf("google: error getting credentials using %v environment variable: %v", envVar, err) + } + return creds, nil + } + + // Second, try a well-known file. + filename := wellKnownFile() + if b, err := os.ReadFile(filename); err == nil { + return CredentialsFromJSONWithParams(ctx, b, params) + } + + // Third, if we're on Google Compute Engine, an App Engine standard second generation runtime, + // or App Engine flexible, use the metadata server. + if metadata.OnGCE() { + id, _ := metadata.ProjectID() + universeDomainProvider := func() (string, error) { + universeDomain, err := metadata.Get("universe/universe_domain") + if err != nil { + if _, ok := err.(metadata.NotDefinedError); ok { + // http.StatusNotFound (404) + return defaultUniverseDomain, nil + } else { + return "", err + } + } + return universeDomain, nil + } + return &Credentials{ + ProjectID: id, + TokenSource: computeTokenSource("", params.EarlyTokenRefresh, params.Scopes...), + UniverseDomainProvider: universeDomainProvider, + universeDomain: params.UniverseDomain, + }, nil + } + + // None are found; return helpful error. + return nil, fmt.Errorf("google: could not find default credentials. See %v for more information", adcSetupURL) +} + +// FindDefaultCredentials invokes FindDefaultCredentialsWithParams with the specified scopes. +func FindDefaultCredentials(ctx context.Context, scopes ...string) (*Credentials, error) { + var params CredentialsParams + params.Scopes = scopes + return FindDefaultCredentialsWithParams(ctx, params) +} + +// CredentialsFromJSONWithParams obtains Google credentials from a JSON value. The JSON can +// represent either a Google Developers Console client_credentials.json file (as in ConfigFromJSON), +// a Google Developers service account key file, a gcloud user credentials file (a.k.a. refresh +// token JSON), or the JSON configuration file for workload identity federation in non-Google cloud +// platforms (see https://cloud.google.com/iam/docs/how-to#using-workload-identity-federation). +func CredentialsFromJSONWithParams(ctx context.Context, jsonData []byte, params CredentialsParams) (*Credentials, error) { + // Make defensive copy of the slices in params. + params = params.deepCopy() + + // First, attempt to parse jsonData as a Google Developers Console client_credentials.json. + config, _ := ConfigFromJSON(jsonData, params.Scopes...) + if config != nil { + return &Credentials{ + ProjectID: "", + TokenSource: authhandler.TokenSourceWithPKCE(ctx, config, params.State, params.AuthHandler, params.PKCE), + JSON: jsonData, + }, nil + } + + // Otherwise, parse jsonData as one of the other supported credentials files. + var f credentialsFile + if err := json.Unmarshal(jsonData, &f); err != nil { + return nil, err + } + + universeDomain := f.UniverseDomain + if params.UniverseDomain != "" { + universeDomain = params.UniverseDomain + } + // Authorized user credentials are only supported in the googleapis.com universe. + if f.Type == userCredentialsKey { + universeDomain = defaultUniverseDomain + } + + ts, err := f.tokenSource(ctx, params) + if err != nil { + return nil, err + } + ts = newErrWrappingTokenSource(ts) + return &Credentials{ + ProjectID: f.ProjectID, + TokenSource: ts, + JSON: jsonData, + universeDomain: universeDomain, + }, nil +} + +// CredentialsFromJSON invokes CredentialsFromJSONWithParams with the specified scopes. +func CredentialsFromJSON(ctx context.Context, jsonData []byte, scopes ...string) (*Credentials, error) { + var params CredentialsParams + params.Scopes = scopes + return CredentialsFromJSONWithParams(ctx, jsonData, params) +} + +func wellKnownFile() string { + const f = "application_default_credentials.json" + if runtime.GOOS == "windows" { + return filepath.Join(os.Getenv("APPDATA"), "gcloud", f) + } + return filepath.Join(guessUnixHomeDir(), ".config", "gcloud", f) +} + +func readCredentialsFile(ctx context.Context, filename string, params CredentialsParams) (*Credentials, error) { + b, err := os.ReadFile(filename) + if err != nil { + return nil, err + } + return CredentialsFromJSONWithParams(ctx, b, params) +} diff --git a/vendor/golang.org/x/oauth2/google/doc.go b/vendor/golang.org/x/oauth2/google/doc.go new file mode 100644 index 000000000..830d268c1 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/doc.go @@ -0,0 +1,53 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package google provides support for making OAuth2 authorized and authenticated +// HTTP requests to Google APIs. It supports the Web server flow, client-side +// credentials, service accounts, Google Compute Engine service accounts, +// Google App Engine service accounts and workload identity federation +// from non-Google cloud platforms. +// +// A brief overview of the package follows. For more information, please read +// https://developers.google.com/accounts/docs/OAuth2 +// and +// https://developers.google.com/accounts/docs/application-default-credentials. +// For more information on using workload identity federation, refer to +// https://cloud.google.com/iam/docs/how-to#using-workload-identity-federation. +// +// # OAuth2 Configs +// +// Two functions in this package return golang.org/x/oauth2.Config values from Google credential +// data. Google supports two JSON formats for OAuth2 credentials: one is handled by ConfigFromJSON, +// the other by JWTConfigFromJSON. The returned Config can be used to obtain a TokenSource or +// create an http.Client. +// +// # Workload and Workforce Identity Federation +// +// For information on how to use Workload and Workforce Identity Federation, see [golang.org/x/oauth2/google/externalaccount]. +// +// # Credentials +// +// The Credentials type represents Google credentials, including Application Default +// Credentials. +// +// Use FindDefaultCredentials to obtain Application Default Credentials. +// FindDefaultCredentials looks in some well-known places for a credentials file, and +// will call AppEngineTokenSource or ComputeTokenSource as needed. +// +// Application Default Credentials also support workload identity federation to +// access Google Cloud resources from non-Google Cloud platforms including Amazon +// Web Services (AWS), Microsoft Azure or any identity provider that supports +// OpenID Connect (OIDC). Workload identity federation is recommended for +// non-Google Cloud environments as it avoids the need to download, manage and +// store service account private keys locally. +// +// DefaultClient and DefaultTokenSource are convenience methods. They first call FindDefaultCredentials, +// then use the credentials to construct an http.Client or an oauth2.TokenSource. +// +// Use CredentialsFromJSON to obtain credentials from either of the two JSON formats +// described in OAuth2 Configs, above. The TokenSource in the returned value is the +// same as the one obtained from the oauth2.Config returned from ConfigFromJSON or +// JWTConfigFromJSON, but the Credentials may contain additional information +// that is useful is some circumstances. +package google // import "golang.org/x/oauth2/google" diff --git a/vendor/golang.org/x/oauth2/google/error.go b/vendor/golang.org/x/oauth2/google/error.go new file mode 100644 index 000000000..d84dd0047 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/error.go @@ -0,0 +1,64 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package google + +import ( + "errors" + + "golang.org/x/oauth2" +) + +// AuthenticationError indicates there was an error in the authentication flow. +// +// Use (*AuthenticationError).Temporary to check if the error can be retried. +type AuthenticationError struct { + err *oauth2.RetrieveError +} + +func newAuthenticationError(err error) error { + re := &oauth2.RetrieveError{} + if !errors.As(err, &re) { + return err + } + return &AuthenticationError{ + err: re, + } +} + +// Temporary indicates that the network error has one of the following status codes and may be retried: 500, 503, 408, or 429. +func (e *AuthenticationError) Temporary() bool { + if e.err.Response == nil { + return false + } + sc := e.err.Response.StatusCode + return sc == 500 || sc == 503 || sc == 408 || sc == 429 +} + +func (e *AuthenticationError) Error() string { + return e.err.Error() +} + +func (e *AuthenticationError) Unwrap() error { + return e.err +} + +type errWrappingTokenSource struct { + src oauth2.TokenSource +} + +func newErrWrappingTokenSource(ts oauth2.TokenSource) oauth2.TokenSource { + return &errWrappingTokenSource{src: ts} +} + +// Token returns the current token if it's still valid, else will +// refresh the current token (using r.Context for HTTP client +// information) and return the new one. +func (s *errWrappingTokenSource) Token() (*oauth2.Token, error) { + t, err := s.src.Token() + if err != nil { + return nil, newAuthenticationError(err) + } + return t, nil +} diff --git a/vendor/golang.org/x/oauth2/google/externalaccount/aws.go b/vendor/golang.org/x/oauth2/google/externalaccount/aws.go new file mode 100644 index 000000000..ca27c2e98 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/externalaccount/aws.go @@ -0,0 +1,577 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package externalaccount + +import ( + "bytes" + "context" + "crypto/hmac" + "crypto/sha256" + "encoding/hex" + "encoding/json" + "errors" + "fmt" + "io" + "io/ioutil" + "net/http" + "net/url" + "os" + "path" + "sort" + "strings" + "time" + + "golang.org/x/oauth2" +) + +// AwsSecurityCredentials models AWS security credentials. +type AwsSecurityCredentials struct { + // AccessKeyId is the AWS Access Key ID - Required. + AccessKeyID string `json:"AccessKeyID"` + // SecretAccessKey is the AWS Secret Access Key - Required. + SecretAccessKey string `json:"SecretAccessKey"` + // SessionToken is the AWS Session token. This should be provided for temporary AWS security credentials - Optional. + SessionToken string `json:"Token"` +} + +// awsRequestSigner is a utility class to sign http requests using a AWS V4 signature. +type awsRequestSigner struct { + RegionName string + AwsSecurityCredentials *AwsSecurityCredentials +} + +// getenv aliases os.Getenv for testing +var getenv = os.Getenv + +const ( + defaultRegionalCredentialVerificationUrl = "https://sts.{region}.amazonaws.com?Action=GetCallerIdentity&Version=2011-06-15" + + // AWS Signature Version 4 signing algorithm identifier. + awsAlgorithm = "AWS4-HMAC-SHA256" + + // The termination string for the AWS credential scope value as defined in + // https://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html + awsRequestType = "aws4_request" + + // The AWS authorization header name for the security session token if available. + awsSecurityTokenHeader = "x-amz-security-token" + + // The name of the header containing the session token for metadata endpoint calls + awsIMDSv2SessionTokenHeader = "X-aws-ec2-metadata-token" + + awsIMDSv2SessionTtlHeader = "X-aws-ec2-metadata-token-ttl-seconds" + + awsIMDSv2SessionTtl = "300" + + // The AWS authorization header name for the auto-generated date. + awsDateHeader = "x-amz-date" + + // Supported AWS configuration environment variables. + awsAccessKeyId = "AWS_ACCESS_KEY_ID" + awsDefaultRegion = "AWS_DEFAULT_REGION" + awsRegion = "AWS_REGION" + awsSecretAccessKey = "AWS_SECRET_ACCESS_KEY" + awsSessionToken = "AWS_SESSION_TOKEN" + + awsTimeFormatLong = "20060102T150405Z" + awsTimeFormatShort = "20060102" +) + +func getSha256(input []byte) (string, error) { + hash := sha256.New() + if _, err := hash.Write(input); err != nil { + return "", err + } + return hex.EncodeToString(hash.Sum(nil)), nil +} + +func getHmacSha256(key, input []byte) ([]byte, error) { + hash := hmac.New(sha256.New, key) + if _, err := hash.Write(input); err != nil { + return nil, err + } + return hash.Sum(nil), nil +} + +func cloneRequest(r *http.Request) *http.Request { + r2 := new(http.Request) + *r2 = *r + if r.Header != nil { + r2.Header = make(http.Header, len(r.Header)) + + // Find total number of values. + headerCount := 0 + for _, headerValues := range r.Header { + headerCount += len(headerValues) + } + copiedHeaders := make([]string, headerCount) // shared backing array for headers' values + + for headerKey, headerValues := range r.Header { + headerCount = copy(copiedHeaders, headerValues) + r2.Header[headerKey] = copiedHeaders[:headerCount:headerCount] + copiedHeaders = copiedHeaders[headerCount:] + } + } + return r2 +} + +func canonicalPath(req *http.Request) string { + result := req.URL.EscapedPath() + if result == "" { + return "/" + } + return path.Clean(result) +} + +func canonicalQuery(req *http.Request) string { + queryValues := req.URL.Query() + for queryKey := range queryValues { + sort.Strings(queryValues[queryKey]) + } + return queryValues.Encode() +} + +func canonicalHeaders(req *http.Request) (string, string) { + // Header keys need to be sorted alphabetically. + var headers []string + lowerCaseHeaders := make(http.Header) + for k, v := range req.Header { + k := strings.ToLower(k) + if _, ok := lowerCaseHeaders[k]; ok { + // include additional values + lowerCaseHeaders[k] = append(lowerCaseHeaders[k], v...) + } else { + headers = append(headers, k) + lowerCaseHeaders[k] = v + } + } + sort.Strings(headers) + + var fullHeaders bytes.Buffer + for _, header := range headers { + headerValue := strings.Join(lowerCaseHeaders[header], ",") + fullHeaders.WriteString(header) + fullHeaders.WriteRune(':') + fullHeaders.WriteString(headerValue) + fullHeaders.WriteRune('\n') + } + + return strings.Join(headers, ";"), fullHeaders.String() +} + +func requestDataHash(req *http.Request) (string, error) { + var requestData []byte + if req.Body != nil { + requestBody, err := req.GetBody() + if err != nil { + return "", err + } + defer requestBody.Close() + + requestData, err = ioutil.ReadAll(io.LimitReader(requestBody, 1<<20)) + if err != nil { + return "", err + } + } + + return getSha256(requestData) +} + +func requestHost(req *http.Request) string { + if req.Host != "" { + return req.Host + } + return req.URL.Host +} + +func canonicalRequest(req *http.Request, canonicalHeaderColumns, canonicalHeaderData string) (string, error) { + dataHash, err := requestDataHash(req) + if err != nil { + return "", err + } + + return fmt.Sprintf("%s\n%s\n%s\n%s\n%s\n%s", req.Method, canonicalPath(req), canonicalQuery(req), canonicalHeaderData, canonicalHeaderColumns, dataHash), nil +} + +// SignRequest adds the appropriate headers to an http.Request +// or returns an error if something prevented this. +func (rs *awsRequestSigner) SignRequest(req *http.Request) error { + signedRequest := cloneRequest(req) + timestamp := now() + + signedRequest.Header.Add("host", requestHost(req)) + + if rs.AwsSecurityCredentials.SessionToken != "" { + signedRequest.Header.Add(awsSecurityTokenHeader, rs.AwsSecurityCredentials.SessionToken) + } + + if signedRequest.Header.Get("date") == "" { + signedRequest.Header.Add(awsDateHeader, timestamp.Format(awsTimeFormatLong)) + } + + authorizationCode, err := rs.generateAuthentication(signedRequest, timestamp) + if err != nil { + return err + } + signedRequest.Header.Set("Authorization", authorizationCode) + + req.Header = signedRequest.Header + return nil +} + +func (rs *awsRequestSigner) generateAuthentication(req *http.Request, timestamp time.Time) (string, error) { + canonicalHeaderColumns, canonicalHeaderData := canonicalHeaders(req) + + dateStamp := timestamp.Format(awsTimeFormatShort) + serviceName := "" + if splitHost := strings.Split(requestHost(req), "."); len(splitHost) > 0 { + serviceName = splitHost[0] + } + + credentialScope := fmt.Sprintf("%s/%s/%s/%s", dateStamp, rs.RegionName, serviceName, awsRequestType) + + requestString, err := canonicalRequest(req, canonicalHeaderColumns, canonicalHeaderData) + if err != nil { + return "", err + } + requestHash, err := getSha256([]byte(requestString)) + if err != nil { + return "", err + } + + stringToSign := fmt.Sprintf("%s\n%s\n%s\n%s", awsAlgorithm, timestamp.Format(awsTimeFormatLong), credentialScope, requestHash) + + signingKey := []byte("AWS4" + rs.AwsSecurityCredentials.SecretAccessKey) + for _, signingInput := range []string{ + dateStamp, rs.RegionName, serviceName, awsRequestType, stringToSign, + } { + signingKey, err = getHmacSha256(signingKey, []byte(signingInput)) + if err != nil { + return "", err + } + } + + return fmt.Sprintf("%s Credential=%s/%s, SignedHeaders=%s, Signature=%s", awsAlgorithm, rs.AwsSecurityCredentials.AccessKeyID, credentialScope, canonicalHeaderColumns, hex.EncodeToString(signingKey)), nil +} + +type awsCredentialSource struct { + environmentID string + regionURL string + regionalCredVerificationURL string + credVerificationURL string + imdsv2SessionTokenURL string + targetResource string + requestSigner *awsRequestSigner + region string + ctx context.Context + client *http.Client + awsSecurityCredentialsSupplier AwsSecurityCredentialsSupplier + supplierOptions SupplierOptions +} + +type awsRequestHeader struct { + Key string `json:"key"` + Value string `json:"value"` +} + +type awsRequest struct { + URL string `json:"url"` + Method string `json:"method"` + Headers []awsRequestHeader `json:"headers"` +} + +func (cs awsCredentialSource) doRequest(req *http.Request) (*http.Response, error) { + if cs.client == nil { + cs.client = oauth2.NewClient(cs.ctx, nil) + } + return cs.client.Do(req.WithContext(cs.ctx)) +} + +func canRetrieveRegionFromEnvironment() bool { + // The AWS region can be provided through AWS_REGION or AWS_DEFAULT_REGION. Only one is + // required. + return getenv(awsRegion) != "" || getenv(awsDefaultRegion) != "" +} + +func canRetrieveSecurityCredentialFromEnvironment() bool { + // Check if both AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY are available. + return getenv(awsAccessKeyId) != "" && getenv(awsSecretAccessKey) != "" +} + +func (cs awsCredentialSource) shouldUseMetadataServer() bool { + return cs.awsSecurityCredentialsSupplier == nil && (!canRetrieveRegionFromEnvironment() || !canRetrieveSecurityCredentialFromEnvironment()) +} + +func (cs awsCredentialSource) credentialSourceType() string { + if cs.awsSecurityCredentialsSupplier != nil { + return "programmatic" + } + return "aws" +} + +func (cs awsCredentialSource) subjectToken() (string, error) { + // Set Defaults + if cs.regionalCredVerificationURL == "" { + cs.regionalCredVerificationURL = defaultRegionalCredentialVerificationUrl + } + if cs.requestSigner == nil { + headers := make(map[string]string) + if cs.shouldUseMetadataServer() { + awsSessionToken, err := cs.getAWSSessionToken() + if err != nil { + return "", err + } + + if awsSessionToken != "" { + headers[awsIMDSv2SessionTokenHeader] = awsSessionToken + } + } + + awsSecurityCredentials, err := cs.getSecurityCredentials(headers) + if err != nil { + return "", err + } + cs.region, err = cs.getRegion(headers) + if err != nil { + return "", err + } + + cs.requestSigner = &awsRequestSigner{ + RegionName: cs.region, + AwsSecurityCredentials: awsSecurityCredentials, + } + } + + // Generate the signed request to AWS STS GetCallerIdentity API. + // Use the required regional endpoint. Otherwise, the request will fail. + req, err := http.NewRequest("POST", strings.Replace(cs.regionalCredVerificationURL, "{region}", cs.region, 1), nil) + if err != nil { + return "", err + } + // The full, canonical resource name of the workload identity pool + // provider, with or without the HTTPS prefix. + // Including this header as part of the signature is recommended to + // ensure data integrity. + if cs.targetResource != "" { + req.Header.Add("x-goog-cloud-target-resource", cs.targetResource) + } + cs.requestSigner.SignRequest(req) + + /* + The GCP STS endpoint expects the headers to be formatted as: + # [ + # {key: 'x-amz-date', value: '...'}, + # {key: 'Authorization', value: '...'}, + # ... + # ] + # And then serialized as: + # quote(json.dumps({ + # url: '...', + # method: 'POST', + # headers: [{key: 'x-amz-date', value: '...'}, ...] + # })) + */ + + awsSignedReq := awsRequest{ + URL: req.URL.String(), + Method: "POST", + } + for headerKey, headerList := range req.Header { + for _, headerValue := range headerList { + awsSignedReq.Headers = append(awsSignedReq.Headers, awsRequestHeader{ + Key: headerKey, + Value: headerValue, + }) + } + } + sort.Slice(awsSignedReq.Headers, func(i, j int) bool { + headerCompare := strings.Compare(awsSignedReq.Headers[i].Key, awsSignedReq.Headers[j].Key) + if headerCompare == 0 { + return strings.Compare(awsSignedReq.Headers[i].Value, awsSignedReq.Headers[j].Value) < 0 + } + return headerCompare < 0 + }) + + result, err := json.Marshal(awsSignedReq) + if err != nil { + return "", err + } + return url.QueryEscape(string(result)), nil +} + +func (cs *awsCredentialSource) getAWSSessionToken() (string, error) { + if cs.imdsv2SessionTokenURL == "" { + return "", nil + } + + req, err := http.NewRequest("PUT", cs.imdsv2SessionTokenURL, nil) + if err != nil { + return "", err + } + + req.Header.Add(awsIMDSv2SessionTtlHeader, awsIMDSv2SessionTtl) + + resp, err := cs.doRequest(req) + if err != nil { + return "", err + } + defer resp.Body.Close() + + respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20)) + if err != nil { + return "", err + } + + if resp.StatusCode != 200 { + return "", fmt.Errorf("oauth2/google/externalaccount: unable to retrieve AWS session token - %s", string(respBody)) + } + + return string(respBody), nil +} + +func (cs *awsCredentialSource) getRegion(headers map[string]string) (string, error) { + if cs.awsSecurityCredentialsSupplier != nil { + return cs.awsSecurityCredentialsSupplier.AwsRegion(cs.ctx, cs.supplierOptions) + } + if canRetrieveRegionFromEnvironment() { + if envAwsRegion := getenv(awsRegion); envAwsRegion != "" { + cs.region = envAwsRegion + return envAwsRegion, nil + } + return getenv("AWS_DEFAULT_REGION"), nil + } + + if cs.regionURL == "" { + return "", errors.New("oauth2/google/externalaccount: unable to determine AWS region") + } + + req, err := http.NewRequest("GET", cs.regionURL, nil) + if err != nil { + return "", err + } + + for name, value := range headers { + req.Header.Add(name, value) + } + + resp, err := cs.doRequest(req) + if err != nil { + return "", err + } + defer resp.Body.Close() + + respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20)) + if err != nil { + return "", err + } + + if resp.StatusCode != 200 { + return "", fmt.Errorf("oauth2/google/externalaccount: unable to retrieve AWS region - %s", string(respBody)) + } + + // This endpoint will return the region in format: us-east-2b. + // Only the us-east-2 part should be used. + respBodyEnd := 0 + if len(respBody) > 1 { + respBodyEnd = len(respBody) - 1 + } + return string(respBody[:respBodyEnd]), nil +} + +func (cs *awsCredentialSource) getSecurityCredentials(headers map[string]string) (result *AwsSecurityCredentials, err error) { + if cs.awsSecurityCredentialsSupplier != nil { + return cs.awsSecurityCredentialsSupplier.AwsSecurityCredentials(cs.ctx, cs.supplierOptions) + } + if canRetrieveSecurityCredentialFromEnvironment() { + return &AwsSecurityCredentials{ + AccessKeyID: getenv(awsAccessKeyId), + SecretAccessKey: getenv(awsSecretAccessKey), + SessionToken: getenv(awsSessionToken), + }, nil + } + + roleName, err := cs.getMetadataRoleName(headers) + if err != nil { + return + } + + credentials, err := cs.getMetadataSecurityCredentials(roleName, headers) + if err != nil { + return + } + + if credentials.AccessKeyID == "" { + return result, errors.New("oauth2/google/externalaccount: missing AccessKeyId credential") + } + + if credentials.SecretAccessKey == "" { + return result, errors.New("oauth2/google/externalaccount: missing SecretAccessKey credential") + } + + return &credentials, nil +} + +func (cs *awsCredentialSource) getMetadataSecurityCredentials(roleName string, headers map[string]string) (AwsSecurityCredentials, error) { + var result AwsSecurityCredentials + + req, err := http.NewRequest("GET", fmt.Sprintf("%s/%s", cs.credVerificationURL, roleName), nil) + if err != nil { + return result, err + } + + for name, value := range headers { + req.Header.Add(name, value) + } + + resp, err := cs.doRequest(req) + if err != nil { + return result, err + } + defer resp.Body.Close() + + respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20)) + if err != nil { + return result, err + } + + if resp.StatusCode != 200 { + return result, fmt.Errorf("oauth2/google/externalaccount: unable to retrieve AWS security credentials - %s", string(respBody)) + } + + err = json.Unmarshal(respBody, &result) + return result, err +} + +func (cs *awsCredentialSource) getMetadataRoleName(headers map[string]string) (string, error) { + if cs.credVerificationURL == "" { + return "", errors.New("oauth2/google/externalaccount: unable to determine the AWS metadata server security credentials endpoint") + } + + req, err := http.NewRequest("GET", cs.credVerificationURL, nil) + if err != nil { + return "", err + } + + for name, value := range headers { + req.Header.Add(name, value) + } + + resp, err := cs.doRequest(req) + if err != nil { + return "", err + } + defer resp.Body.Close() + + respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20)) + if err != nil { + return "", err + } + + if resp.StatusCode != 200 { + return "", fmt.Errorf("oauth2/google/externalaccount: unable to retrieve AWS role name - %s", string(respBody)) + } + + return string(respBody), nil +} diff --git a/vendor/golang.org/x/oauth2/google/externalaccount/basecredentials.go b/vendor/golang.org/x/oauth2/google/externalaccount/basecredentials.go new file mode 100644 index 000000000..6c81a6872 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/externalaccount/basecredentials.go @@ -0,0 +1,485 @@ +// Copyright 2020 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* +Package externalaccount provides support for creating workload identity +federation and workforce identity federation token sources that can be +used to access Google Cloud resources from external identity providers. + +# Workload Identity Federation + +Using workload identity federation, your application can access Google Cloud +resources from Amazon Web Services (AWS), Microsoft Azure or any identity +provider that supports OpenID Connect (OIDC) or SAML 2.0. +Traditionally, applications running outside Google Cloud have used service +account keys to access Google Cloud resources. Using identity federation, +you can allow your workload to impersonate a service account. +This lets you access Google Cloud resources directly, eliminating the +maintenance and security burden associated with service account keys. + +Follow the detailed instructions on how to configure Workload Identity Federation +in various platforms: + +Amazon Web Services (AWS): https://cloud.google.com/iam/docs/workload-identity-federation-with-other-clouds#aws +Microsoft Azure: https://cloud.google.com/iam/docs/workload-identity-federation-with-other-clouds#azure +OIDC identity provider: https://cloud.google.com/iam/docs/workload-identity-federation-with-other-providers#oidc +SAML 2.0 identity provider: https://cloud.google.com/iam/docs/workload-identity-federation-with-other-providers#saml + +For OIDC and SAML providers, the library can retrieve tokens in fours ways: +from a local file location (file-sourced credentials), from a server +(URL-sourced credentials), from a local executable (executable-sourced +credentials), or from a user defined function that returns an OIDC or SAML token. +For file-sourced credentials, a background process needs to be continuously +refreshing the file location with a new OIDC/SAML token prior to expiration. +For tokens with one hour lifetimes, the token needs to be updated in the file +every hour. The token can be stored directly as plain text or in JSON format. +For URL-sourced credentials, a local server needs to host a GET endpoint to +return the OIDC/SAML token. The response can be in plain text or JSON. +Additional required request headers can also be specified. +For executable-sourced credentials, an application needs to be available to +output the OIDC/SAML token and other information in a JSON format. +For more information on how these work (and how to implement +executable-sourced credentials), please check out: +https://cloud.google.com/iam/docs/workload-identity-federation-with-other-providers#create_a_credential_configuration + +To use a custom function to supply the token, define a struct that implements the [SubjectTokenSupplier] interface for OIDC/SAML providers, +or one that implements [AwsSecurityCredentialsSupplier] for AWS providers. This can then be used when building a [Config]. +The [golang.org/x/oauth2.TokenSource] created from the config using [NewTokenSource] can then be used to access Google +Cloud resources. For instance, you can create a new client from the +[cloud.google.com/go/storage] package and pass in option.WithTokenSource(yourTokenSource)) + +Note that this library does not perform any validation on the token_url, token_info_url, +or service_account_impersonation_url fields of the credential configuration. +It is not recommended to use a credential configuration that you did not generate with +the gcloud CLI unless you verify that the URL fields point to a googleapis.com domain. + +# Workforce Identity Federation + +Workforce identity federation lets you use an external identity provider (IdP) to +authenticate and authorize a workforce—a group of users, such as employees, partners, +and contractors—using IAM, so that the users can access Google Cloud services. +Workforce identity federation extends Google Cloud's identity capabilities to support +syncless, attribute-based single sign on. + +With workforce identity federation, your workforce can access Google Cloud resources +using an external identity provider (IdP) that supports OpenID Connect (OIDC) or +SAML 2.0 such as Azure Active Directory (Azure AD), Active Directory Federation +Services (AD FS), Okta, and others. + +Follow the detailed instructions on how to configure Workload Identity Federation +in various platforms: + +Azure AD: https://cloud.google.com/iam/docs/workforce-sign-in-azure-ad +Okta: https://cloud.google.com/iam/docs/workforce-sign-in-okta +OIDC identity provider: https://cloud.google.com/iam/docs/configuring-workforce-identity-federation#oidc +SAML 2.0 identity provider: https://cloud.google.com/iam/docs/configuring-workforce-identity-federation#saml + +For workforce identity federation, the library can retrieve tokens in four ways: +from a local file location (file-sourced credentials), from a server +(URL-sourced credentials), from a local executable (executable-sourced +credentials), or from a user supplied function that returns an OIDC or SAML token. +For file-sourced credentials, a background process needs to be continuously +refreshing the file location with a new OIDC/SAML token prior to expiration. +For tokens with one hour lifetimes, the token needs to be updated in the file +every hour. The token can be stored directly as plain text or in JSON format. +For URL-sourced credentials, a local server needs to host a GET endpoint to +return the OIDC/SAML token. The response can be in plain text or JSON. +Additional required request headers can also be specified. +For executable-sourced credentials, an application needs to be available to +output the OIDC/SAML token and other information in a JSON format. +For more information on how these work (and how to implement +executable-sourced credentials), please check out: +https://cloud.google.com/iam/docs/workforce-obtaining-short-lived-credentials#generate_a_configuration_file_for_non-interactive_sign-in + +To use a custom function to supply the token, define a struct that implements the [SubjectTokenSupplier] interface for OIDC/SAML providers. +This can then be used when building a [Config]. +The [golang.org/x/oauth2.TokenSource] created from the config using [NewTokenSource] can then be used access Google +Cloud resources. For instance, you can create a new client from the +[cloud.google.com/go/storage] package and pass in option.WithTokenSource(yourTokenSource)) + +# Security considerations + +Note that this library does not perform any validation on the token_url, token_info_url, +or service_account_impersonation_url fields of the credential configuration. +It is not recommended to use a credential configuration that you did not generate with +the gcloud CLI unless you verify that the URL fields point to a googleapis.com domain. +*/ +package externalaccount + +import ( + "context" + "fmt" + "net/http" + "regexp" + "strconv" + "strings" + "time" + + "golang.org/x/oauth2" + "golang.org/x/oauth2/google/internal/impersonate" + "golang.org/x/oauth2/google/internal/stsexchange" +) + +const ( + universeDomainPlaceholder = "UNIVERSE_DOMAIN" + defaultTokenURL = "https://sts.UNIVERSE_DOMAIN/v1/token" + defaultUniverseDomain = "googleapis.com" +) + +// now aliases time.Now for testing +var now = func() time.Time { + return time.Now().UTC() +} + +// Config stores the configuration for fetching tokens with external credentials. +type Config struct { + // Audience is the Secure Token Service (STS) audience which contains the resource name for the workload + // identity pool or the workforce pool and the provider identifier in that pool. Required. + Audience string + // SubjectTokenType is the STS token type based on the Oauth2.0 token exchange spec. + // Expected values include: + // “urn:ietf:params:oauth:token-type:jwt” + // “urn:ietf:params:oauth:token-type:id-token” + // “urn:ietf:params:oauth:token-type:saml2” + // “urn:ietf:params:aws:token-type:aws4_request” + // Required. + SubjectTokenType string + // TokenURL is the STS token exchange endpoint. If not provided, will default to + // https://sts.UNIVERSE_DOMAIN/v1/token, with UNIVERSE_DOMAIN set to the + // default service domain googleapis.com unless UniverseDomain is set. + // Optional. + TokenURL string + // TokenInfoURL is the token_info endpoint used to retrieve the account related information ( + // user attributes like account identifier, eg. email, username, uid, etc). This is + // needed for gCloud session account identification. Optional. + TokenInfoURL string + // ServiceAccountImpersonationURL is the URL for the service account impersonation request. This is only + // required for workload identity pools when APIs to be accessed have not integrated with UberMint. Optional. + ServiceAccountImpersonationURL string + // ServiceAccountImpersonationLifetimeSeconds is the number of seconds the service account impersonation + // token will be valid for. If not provided, it will default to 3600. Optional. + ServiceAccountImpersonationLifetimeSeconds int + // ClientSecret is currently only required if token_info endpoint also + // needs to be called with the generated GCP access token. When provided, STS will be + // called with additional basic authentication using ClientId as username and ClientSecret as password. Optional. + ClientSecret string + // ClientID is only required in conjunction with ClientSecret, as described above. Optional. + ClientID string + // CredentialSource contains the necessary information to retrieve the token itself, as well + // as some environmental information. One of SubjectTokenSupplier, AWSSecurityCredentialSupplier or + // CredentialSource must be provided. Optional. + CredentialSource *CredentialSource + // QuotaProjectID is injected by gCloud. If the value is non-empty, the Auth libraries + // will set the x-goog-user-project header which overrides the project associated with the credentials. Optional. + QuotaProjectID string + // Scopes contains the desired scopes for the returned access token. Optional. + Scopes []string + // WorkforcePoolUserProject is the workforce pool user project number when the credential + // corresponds to a workforce pool and not a workload identity pool. + // The underlying principal must still have serviceusage.services.use IAM + // permission to use the project for billing/quota. Optional. + WorkforcePoolUserProject string + // SubjectTokenSupplier is an optional token supplier for OIDC/SAML credentials. + // One of SubjectTokenSupplier, AWSSecurityCredentialSupplier or CredentialSource must be provided. Optional. + SubjectTokenSupplier SubjectTokenSupplier + // AwsSecurityCredentialsSupplier is an AWS Security Credential supplier for AWS credentials. + // One of SubjectTokenSupplier, AWSSecurityCredentialSupplier or CredentialSource must be provided. Optional. + AwsSecurityCredentialsSupplier AwsSecurityCredentialsSupplier + // UniverseDomain is the default service domain for a given Cloud universe. + // This value will be used in the default STS token URL. The default value + // is "googleapis.com". It will not be used if TokenURL is set. Optional. + UniverseDomain string +} + +var ( + validWorkforceAudiencePattern *regexp.Regexp = regexp.MustCompile(`//iam\.googleapis\.com/locations/[^/]+/workforcePools/`) +) + +func validateWorkforceAudience(input string) bool { + return validWorkforceAudiencePattern.MatchString(input) +} + +// NewTokenSource Returns an external account TokenSource using the provided external account config. +func NewTokenSource(ctx context.Context, conf Config) (oauth2.TokenSource, error) { + if conf.Audience == "" { + return nil, fmt.Errorf("oauth2/google/externalaccount: Audience must be set") + } + if conf.SubjectTokenType == "" { + return nil, fmt.Errorf("oauth2/google/externalaccount: Subject token type must be set") + } + if conf.WorkforcePoolUserProject != "" { + valid := validateWorkforceAudience(conf.Audience) + if !valid { + return nil, fmt.Errorf("oauth2/google/externalaccount: Workforce pool user project should not be set for non-workforce pool credentials") + } + } + count := 0 + if conf.CredentialSource != nil { + count++ + } + if conf.SubjectTokenSupplier != nil { + count++ + } + if conf.AwsSecurityCredentialsSupplier != nil { + count++ + } + if count == 0 { + return nil, fmt.Errorf("oauth2/google/externalaccount: One of CredentialSource, SubjectTokenSupplier, or AwsSecurityCredentialsSupplier must be set") + } + if count > 1 { + return nil, fmt.Errorf("oauth2/google/externalaccount: Only one of CredentialSource, SubjectTokenSupplier, or AwsSecurityCredentialsSupplier must be set") + } + return conf.tokenSource(ctx, "https") +} + +// tokenSource is a private function that's directly called by some of the tests, +// because the unit test URLs are mocked, and would otherwise fail the +// validity check. +func (c *Config) tokenSource(ctx context.Context, scheme string) (oauth2.TokenSource, error) { + + ts := tokenSource{ + ctx: ctx, + conf: c, + } + if c.ServiceAccountImpersonationURL == "" { + return oauth2.ReuseTokenSource(nil, ts), nil + } + scopes := c.Scopes + ts.conf.Scopes = []string{"https://www.googleapis.com/auth/cloud-platform"} + imp := impersonate.ImpersonateTokenSource{ + Ctx: ctx, + URL: c.ServiceAccountImpersonationURL, + Scopes: scopes, + Ts: oauth2.ReuseTokenSource(nil, ts), + TokenLifetimeSeconds: c.ServiceAccountImpersonationLifetimeSeconds, + } + return oauth2.ReuseTokenSource(nil, imp), nil +} + +// Subject token file types. +const ( + fileTypeText = "text" + fileTypeJSON = "json" +) + +// Format contains information needed to retireve a subject token for URL or File sourced credentials. +type Format struct { + // Type should be either "text" or "json". This determines whether the file or URL sourced credentials + // expect a simple text subject token or if the subject token will be contained in a JSON object. + // When not provided "text" type is assumed. + Type string `json:"type"` + // SubjectTokenFieldName is only required for JSON format. This is the field name that the credentials will check + // for the subject token in the file or URL response. This would be "access_token" for azure. + SubjectTokenFieldName string `json:"subject_token_field_name"` +} + +// CredentialSource stores the information necessary to retrieve the credentials for the STS exchange. +type CredentialSource struct { + // File is the location for file sourced credentials. + // One field amongst File, URL, Executable, or EnvironmentID should be provided, depending on the kind of credential in question. + File string `json:"file"` + + // Url is the URL to call for URL sourced credentials. + // One field amongst File, URL, Executable, or EnvironmentID should be provided, depending on the kind of credential in question. + URL string `json:"url"` + // Headers are the headers to attach to the request for URL sourced credentials. + Headers map[string]string `json:"headers"` + + // Executable is the configuration object for executable sourced credentials. + // One field amongst File, URL, Executable, or EnvironmentID should be provided, depending on the kind of credential in question. + Executable *ExecutableConfig `json:"executable"` + + // EnvironmentID is the EnvironmentID used for AWS sourced credentials. This should start with "AWS". + // One field amongst File, URL, Executable, or EnvironmentID should be provided, depending on the kind of credential in question. + EnvironmentID string `json:"environment_id"` + // RegionURL is the metadata URL to retrieve the region from for EC2 AWS credentials. + RegionURL string `json:"region_url"` + // RegionalCredVerificationURL is the AWS regional credential verification URL, will default to + // "https://sts.{region}.amazonaws.com?Action=GetCallerIdentity&Version=2011-06-15" if not provided." + RegionalCredVerificationURL string `json:"regional_cred_verification_url"` + // IMDSv2SessionTokenURL is the URL to retrieve the session token when using IMDSv2 in AWS. + IMDSv2SessionTokenURL string `json:"imdsv2_session_token_url"` + // Format is the format type for the subject token. Used for File and URL sourced credentials. Expected values are "text" or "json". + Format Format `json:"format"` +} + +// ExecutableConfig contains information needed for executable sourced credentials. +type ExecutableConfig struct { + // Command is the the full command to run to retrieve the subject token. + // This can include arguments. Must be an absolute path for the program. Required. + Command string `json:"command"` + // TimeoutMillis is the timeout duration, in milliseconds. Defaults to 30000 milliseconds when not provided. Optional. + TimeoutMillis *int `json:"timeout_millis"` + // OutputFile is the absolute path to the output file where the executable will cache the response. + // If specified the auth libraries will first check this location before running the executable. Optional. + OutputFile string `json:"output_file"` +} + +// SubjectTokenSupplier can be used to supply a subject token to exchange for a GCP access token. +type SubjectTokenSupplier interface { + // SubjectToken should return a valid subject token or an error. + // The external account token source does not cache the returned subject token, so caching + // logic should be implemented in the supplier to prevent multiple requests for the same subject token. + SubjectToken(ctx context.Context, options SupplierOptions) (string, error) +} + +// AWSSecurityCredentialsSupplier can be used to supply AwsSecurityCredentials and an AWS Region to +// exchange for a GCP access token. +type AwsSecurityCredentialsSupplier interface { + // AwsRegion should return the AWS region or an error. + AwsRegion(ctx context.Context, options SupplierOptions) (string, error) + // GetAwsSecurityCredentials should return a valid set of AwsSecurityCredentials or an error. + // The external account token source does not cache the returned security credentials, so caching + // logic should be implemented in the supplier to prevent multiple requests for the same security credentials. + AwsSecurityCredentials(ctx context.Context, options SupplierOptions) (*AwsSecurityCredentials, error) +} + +// SupplierOptions contains information about the requested subject token or AWS security credentials from the +// Google external account credential. +type SupplierOptions struct { + // Audience is the requested audience for the external account credential. + Audience string + // Subject token type is the requested subject token type for the external account credential. Expected values include: + // “urn:ietf:params:oauth:token-type:jwt” + // “urn:ietf:params:oauth:token-type:id-token” + // “urn:ietf:params:oauth:token-type:saml2” + // “urn:ietf:params:aws:token-type:aws4_request” + SubjectTokenType string +} + +// tokenURL returns the default STS token endpoint with the configured universe +// domain. +func (c *Config) tokenURL() string { + if c.UniverseDomain == "" { + return strings.Replace(defaultTokenURL, universeDomainPlaceholder, defaultUniverseDomain, 1) + } + return strings.Replace(defaultTokenURL, universeDomainPlaceholder, c.UniverseDomain, 1) +} + +// parse determines the type of CredentialSource needed. +func (c *Config) parse(ctx context.Context) (baseCredentialSource, error) { + //set Defaults + if c.TokenURL == "" { + c.TokenURL = c.tokenURL() + } + supplierOptions := SupplierOptions{Audience: c.Audience, SubjectTokenType: c.SubjectTokenType} + + if c.AwsSecurityCredentialsSupplier != nil { + awsCredSource := awsCredentialSource{ + awsSecurityCredentialsSupplier: c.AwsSecurityCredentialsSupplier, + targetResource: c.Audience, + supplierOptions: supplierOptions, + ctx: ctx, + } + return awsCredSource, nil + } else if c.SubjectTokenSupplier != nil { + return programmaticRefreshCredentialSource{subjectTokenSupplier: c.SubjectTokenSupplier, supplierOptions: supplierOptions, ctx: ctx}, nil + } else if len(c.CredentialSource.EnvironmentID) > 3 && c.CredentialSource.EnvironmentID[:3] == "aws" { + if awsVersion, err := strconv.Atoi(c.CredentialSource.EnvironmentID[3:]); err == nil { + if awsVersion != 1 { + return nil, fmt.Errorf("oauth2/google/externalaccount: aws version '%d' is not supported in the current build", awsVersion) + } + + awsCredSource := awsCredentialSource{ + environmentID: c.CredentialSource.EnvironmentID, + regionURL: c.CredentialSource.RegionURL, + regionalCredVerificationURL: c.CredentialSource.RegionalCredVerificationURL, + credVerificationURL: c.CredentialSource.URL, + targetResource: c.Audience, + ctx: ctx, + } + if c.CredentialSource.IMDSv2SessionTokenURL != "" { + awsCredSource.imdsv2SessionTokenURL = c.CredentialSource.IMDSv2SessionTokenURL + } + + return awsCredSource, nil + } + } else if c.CredentialSource.File != "" { + return fileCredentialSource{File: c.CredentialSource.File, Format: c.CredentialSource.Format}, nil + } else if c.CredentialSource.URL != "" { + return urlCredentialSource{URL: c.CredentialSource.URL, Headers: c.CredentialSource.Headers, Format: c.CredentialSource.Format, ctx: ctx}, nil + } else if c.CredentialSource.Executable != nil { + return createExecutableCredential(ctx, c.CredentialSource.Executable, c) + } + return nil, fmt.Errorf("oauth2/google/externalaccount: unable to parse credential source") +} + +type baseCredentialSource interface { + credentialSourceType() string + subjectToken() (string, error) +} + +// tokenSource is the source that handles external credentials. It is used to retrieve Tokens. +type tokenSource struct { + ctx context.Context + conf *Config +} + +func getMetricsHeaderValue(conf *Config, credSource baseCredentialSource) string { + return fmt.Sprintf("gl-go/%s auth/%s google-byoid-sdk source/%s sa-impersonation/%t config-lifetime/%t", + goVersion(), + "unknown", + credSource.credentialSourceType(), + conf.ServiceAccountImpersonationURL != "", + conf.ServiceAccountImpersonationLifetimeSeconds != 0) +} + +// Token allows tokenSource to conform to the oauth2.TokenSource interface. +func (ts tokenSource) Token() (*oauth2.Token, error) { + conf := ts.conf + + credSource, err := conf.parse(ts.ctx) + if err != nil { + return nil, err + } + subjectToken, err := credSource.subjectToken() + + if err != nil { + return nil, err + } + stsRequest := stsexchange.TokenExchangeRequest{ + GrantType: "urn:ietf:params:oauth:grant-type:token-exchange", + Audience: conf.Audience, + Scope: conf.Scopes, + RequestedTokenType: "urn:ietf:params:oauth:token-type:access_token", + SubjectToken: subjectToken, + SubjectTokenType: conf.SubjectTokenType, + } + header := make(http.Header) + header.Add("Content-Type", "application/x-www-form-urlencoded") + header.Add("x-goog-api-client", getMetricsHeaderValue(conf, credSource)) + clientAuth := stsexchange.ClientAuthentication{ + AuthStyle: oauth2.AuthStyleInHeader, + ClientID: conf.ClientID, + ClientSecret: conf.ClientSecret, + } + var options map[string]interface{} + // Do not pass workforce_pool_user_project when client authentication is used. + // The client ID is sufficient for determining the user project. + if conf.WorkforcePoolUserProject != "" && conf.ClientID == "" { + options = map[string]interface{}{ + "userProject": conf.WorkforcePoolUserProject, + } + } + stsResp, err := stsexchange.ExchangeToken(ts.ctx, conf.TokenURL, &stsRequest, clientAuth, header, options) + if err != nil { + return nil, err + } + + accessToken := &oauth2.Token{ + AccessToken: stsResp.AccessToken, + TokenType: stsResp.TokenType, + } + + // The RFC8693 doesn't define the explicit 0 of "expires_in" field behavior. + if stsResp.ExpiresIn <= 0 { + return nil, fmt.Errorf("oauth2/google/externalaccount: got invalid expiry from security token service") + } + accessToken.Expiry = now().Add(time.Duration(stsResp.ExpiresIn) * time.Second) + + if stsResp.RefreshToken != "" { + accessToken.RefreshToken = stsResp.RefreshToken + } + return accessToken, nil +} diff --git a/vendor/golang.org/x/oauth2/google/externalaccount/executablecredsource.go b/vendor/golang.org/x/oauth2/google/externalaccount/executablecredsource.go new file mode 100644 index 000000000..dca5681a4 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/externalaccount/executablecredsource.go @@ -0,0 +1,313 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package externalaccount + +import ( + "bytes" + "context" + "encoding/json" + "errors" + "fmt" + "io" + "io/ioutil" + "os" + "os/exec" + "regexp" + "strings" + "time" +) + +var serviceAccountImpersonationRE = regexp.MustCompile("https://iamcredentials\\..+/v1/projects/-/serviceAccounts/(.*@.*):generateAccessToken") + +const ( + executableSupportedMaxVersion = 1 + defaultTimeout = 30 * time.Second + timeoutMinimum = 5 * time.Second + timeoutMaximum = 120 * time.Second + executableSource = "response" + outputFileSource = "output file" +) + +type nonCacheableError struct { + message string +} + +func (nce nonCacheableError) Error() string { + return nce.message +} + +func missingFieldError(source, field string) error { + return fmt.Errorf("oauth2/google/externalaccount: %v missing `%q` field", source, field) +} + +func jsonParsingError(source, data string) error { + return fmt.Errorf("oauth2/google/externalaccount: unable to parse %v\nResponse: %v", source, data) +} + +func malformedFailureError() error { + return nonCacheableError{"oauth2/google/externalaccount: response must include `error` and `message` fields when unsuccessful"} +} + +func userDefinedError(code, message string) error { + return nonCacheableError{fmt.Sprintf("oauth2/google/externalaccount: response contains unsuccessful response: (%v) %v", code, message)} +} + +func unsupportedVersionError(source string, version int) error { + return fmt.Errorf("oauth2/google/externalaccount: %v contains unsupported version: %v", source, version) +} + +func tokenExpiredError() error { + return nonCacheableError{"oauth2/google/externalaccount: the token returned by the executable is expired"} +} + +func tokenTypeError(source string) error { + return fmt.Errorf("oauth2/google/externalaccount: %v contains unsupported token type", source) +} + +func exitCodeError(exitCode int) error { + return fmt.Errorf("oauth2/google/externalaccount: executable command failed with exit code %v", exitCode) +} + +func executableError(err error) error { + return fmt.Errorf("oauth2/google/externalaccount: executable command failed: %v", err) +} + +func executablesDisallowedError() error { + return errors.New("oauth2/google/externalaccount: executables need to be explicitly allowed (set GOOGLE_EXTERNAL_ACCOUNT_ALLOW_EXECUTABLES to '1') to run") +} + +func timeoutRangeError() error { + return errors.New("oauth2/google/externalaccount: invalid `timeout_millis` field — executable timeout must be between 5 and 120 seconds") +} + +func commandMissingError() error { + return errors.New("oauth2/google/externalaccount: missing `command` field — executable command must be provided") +} + +type environment interface { + existingEnv() []string + getenv(string) string + run(ctx context.Context, command string, env []string) ([]byte, error) + now() time.Time +} + +type runtimeEnvironment struct{} + +func (r runtimeEnvironment) existingEnv() []string { + return os.Environ() +} + +func (r runtimeEnvironment) getenv(key string) string { + return os.Getenv(key) +} + +func (r runtimeEnvironment) now() time.Time { + return time.Now().UTC() +} + +func (r runtimeEnvironment) run(ctx context.Context, command string, env []string) ([]byte, error) { + splitCommand := strings.Fields(command) + cmd := exec.CommandContext(ctx, splitCommand[0], splitCommand[1:]...) + cmd.Env = env + + var stdout, stderr bytes.Buffer + cmd.Stdout = &stdout + cmd.Stderr = &stderr + + if err := cmd.Run(); err != nil { + if ctx.Err() == context.DeadlineExceeded { + return nil, context.DeadlineExceeded + } + + if exitError, ok := err.(*exec.ExitError); ok { + return nil, exitCodeError(exitError.ExitCode()) + } + + return nil, executableError(err) + } + + bytesStdout := bytes.TrimSpace(stdout.Bytes()) + if len(bytesStdout) > 0 { + return bytesStdout, nil + } + return bytes.TrimSpace(stderr.Bytes()), nil +} + +type executableCredentialSource struct { + Command string + Timeout time.Duration + OutputFile string + ctx context.Context + config *Config + env environment +} + +// CreateExecutableCredential creates an executableCredentialSource given an ExecutableConfig. +// It also performs defaulting and type conversions. +func createExecutableCredential(ctx context.Context, ec *ExecutableConfig, config *Config) (executableCredentialSource, error) { + if ec.Command == "" { + return executableCredentialSource{}, commandMissingError() + } + + result := executableCredentialSource{} + result.Command = ec.Command + if ec.TimeoutMillis == nil { + result.Timeout = defaultTimeout + } else { + result.Timeout = time.Duration(*ec.TimeoutMillis) * time.Millisecond + if result.Timeout < timeoutMinimum || result.Timeout > timeoutMaximum { + return executableCredentialSource{}, timeoutRangeError() + } + } + result.OutputFile = ec.OutputFile + result.ctx = ctx + result.config = config + result.env = runtimeEnvironment{} + return result, nil +} + +type executableResponse struct { + Version int `json:"version,omitempty"` + Success *bool `json:"success,omitempty"` + TokenType string `json:"token_type,omitempty"` + ExpirationTime int64 `json:"expiration_time,omitempty"` + IdToken string `json:"id_token,omitempty"` + SamlResponse string `json:"saml_response,omitempty"` + Code string `json:"code,omitempty"` + Message string `json:"message,omitempty"` +} + +func (cs executableCredentialSource) parseSubjectTokenFromSource(response []byte, source string, now int64) (string, error) { + var result executableResponse + if err := json.Unmarshal(response, &result); err != nil { + return "", jsonParsingError(source, string(response)) + } + + if result.Version == 0 { + return "", missingFieldError(source, "version") + } + + if result.Success == nil { + return "", missingFieldError(source, "success") + } + + if !*result.Success { + if result.Code == "" || result.Message == "" { + return "", malformedFailureError() + } + return "", userDefinedError(result.Code, result.Message) + } + + if result.Version > executableSupportedMaxVersion || result.Version < 0 { + return "", unsupportedVersionError(source, result.Version) + } + + if result.ExpirationTime == 0 && cs.OutputFile != "" { + return "", missingFieldError(source, "expiration_time") + } + + if result.TokenType == "" { + return "", missingFieldError(source, "token_type") + } + + if result.ExpirationTime != 0 && result.ExpirationTime < now { + return "", tokenExpiredError() + } + + if result.TokenType == "urn:ietf:params:oauth:token-type:jwt" || result.TokenType == "urn:ietf:params:oauth:token-type:id_token" { + if result.IdToken == "" { + return "", missingFieldError(source, "id_token") + } + return result.IdToken, nil + } + + if result.TokenType == "urn:ietf:params:oauth:token-type:saml2" { + if result.SamlResponse == "" { + return "", missingFieldError(source, "saml_response") + } + return result.SamlResponse, nil + } + + return "", tokenTypeError(source) +} + +func (cs executableCredentialSource) credentialSourceType() string { + return "executable" +} + +func (cs executableCredentialSource) subjectToken() (string, error) { + if token, err := cs.getTokenFromOutputFile(); token != "" || err != nil { + return token, err + } + + return cs.getTokenFromExecutableCommand() +} + +func (cs executableCredentialSource) getTokenFromOutputFile() (token string, err error) { + if cs.OutputFile == "" { + // This ExecutableCredentialSource doesn't use an OutputFile. + return "", nil + } + + file, err := os.Open(cs.OutputFile) + if err != nil { + // No OutputFile found. Hasn't been created yet, so skip it. + return "", nil + } + defer file.Close() + + data, err := ioutil.ReadAll(io.LimitReader(file, 1<<20)) + if err != nil || len(data) == 0 { + // Cachefile exists, but no data found. Get new credential. + return "", nil + } + + token, err = cs.parseSubjectTokenFromSource(data, outputFileSource, cs.env.now().Unix()) + if err != nil { + if _, ok := err.(nonCacheableError); ok { + // If the cached token is expired we need a new token, + // and if the cache contains a failure, we need to try again. + return "", nil + } + + // There was an error in the cached token, and the developer should be aware of it. + return "", err + } + // Token parsing succeeded. Use found token. + return token, nil +} + +func (cs executableCredentialSource) executableEnvironment() []string { + result := cs.env.existingEnv() + result = append(result, fmt.Sprintf("GOOGLE_EXTERNAL_ACCOUNT_AUDIENCE=%v", cs.config.Audience)) + result = append(result, fmt.Sprintf("GOOGLE_EXTERNAL_ACCOUNT_TOKEN_TYPE=%v", cs.config.SubjectTokenType)) + result = append(result, "GOOGLE_EXTERNAL_ACCOUNT_INTERACTIVE=0") + if cs.config.ServiceAccountImpersonationURL != "" { + matches := serviceAccountImpersonationRE.FindStringSubmatch(cs.config.ServiceAccountImpersonationURL) + if matches != nil { + result = append(result, fmt.Sprintf("GOOGLE_EXTERNAL_ACCOUNT_IMPERSONATED_EMAIL=%v", matches[1])) + } + } + if cs.OutputFile != "" { + result = append(result, fmt.Sprintf("GOOGLE_EXTERNAL_ACCOUNT_OUTPUT_FILE=%v", cs.OutputFile)) + } + return result +} + +func (cs executableCredentialSource) getTokenFromExecutableCommand() (string, error) { + // For security reasons, we need our consumers to set this environment variable to allow executables to be run. + if cs.env.getenv("GOOGLE_EXTERNAL_ACCOUNT_ALLOW_EXECUTABLES") != "1" { + return "", executablesDisallowedError() + } + + ctx, cancel := context.WithDeadline(cs.ctx, cs.env.now().Add(cs.Timeout)) + defer cancel() + + output, err := cs.env.run(ctx, cs.Command, cs.executableEnvironment()) + if err != nil { + return "", err + } + return cs.parseSubjectTokenFromSource(output, executableSource, cs.env.now().Unix()) +} diff --git a/vendor/golang.org/x/oauth2/google/externalaccount/filecredsource.go b/vendor/golang.org/x/oauth2/google/externalaccount/filecredsource.go new file mode 100644 index 000000000..33766b972 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/externalaccount/filecredsource.go @@ -0,0 +1,61 @@ +// Copyright 2020 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package externalaccount + +import ( + "bytes" + "encoding/json" + "errors" + "fmt" + "io" + "io/ioutil" + "os" +) + +type fileCredentialSource struct { + File string + Format Format +} + +func (cs fileCredentialSource) credentialSourceType() string { + return "file" +} + +func (cs fileCredentialSource) subjectToken() (string, error) { + tokenFile, err := os.Open(cs.File) + if err != nil { + return "", fmt.Errorf("oauth2/google/externalaccount: failed to open credential file %q", cs.File) + } + defer tokenFile.Close() + tokenBytes, err := ioutil.ReadAll(io.LimitReader(tokenFile, 1<<20)) + if err != nil { + return "", fmt.Errorf("oauth2/google/externalaccount: failed to read credential file: %v", err) + } + tokenBytes = bytes.TrimSpace(tokenBytes) + switch cs.Format.Type { + case "json": + jsonData := make(map[string]interface{}) + err = json.Unmarshal(tokenBytes, &jsonData) + if err != nil { + return "", fmt.Errorf("oauth2/google/externalaccount: failed to unmarshal subject token file: %v", err) + } + val, ok := jsonData[cs.Format.SubjectTokenFieldName] + if !ok { + return "", errors.New("oauth2/google/externalaccount: provided subject_token_field_name not found in credentials") + } + token, ok := val.(string) + if !ok { + return "", errors.New("oauth2/google/externalaccount: improperly formatted subject token") + } + return token, nil + case "text": + return string(tokenBytes), nil + case "": + return string(tokenBytes), nil + default: + return "", errors.New("oauth2/google/externalaccount: invalid credential_source file format type") + } + +} diff --git a/vendor/golang.org/x/oauth2/google/externalaccount/header.go b/vendor/golang.org/x/oauth2/google/externalaccount/header.go new file mode 100644 index 000000000..1d5aad2e2 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/externalaccount/header.go @@ -0,0 +1,64 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package externalaccount + +import ( + "runtime" + "strings" + "unicode" +) + +var ( + // version is a package internal global variable for testing purposes. + version = runtime.Version +) + +// versionUnknown is only used when the runtime version cannot be determined. +const versionUnknown = "UNKNOWN" + +// goVersion returns a Go runtime version derived from the runtime environment +// that is modified to be suitable for reporting in a header, meaning it has no +// whitespace. If it is unable to determine the Go runtime version, it returns +// versionUnknown. +func goVersion() string { + const develPrefix = "devel +" + + s := version() + if strings.HasPrefix(s, develPrefix) { + s = s[len(develPrefix):] + if p := strings.IndexFunc(s, unicode.IsSpace); p >= 0 { + s = s[:p] + } + return s + } else if p := strings.IndexFunc(s, unicode.IsSpace); p >= 0 { + s = s[:p] + } + + notSemverRune := func(r rune) bool { + return !strings.ContainsRune("0123456789.", r) + } + + if strings.HasPrefix(s, "go1") { + s = s[2:] + var prerelease string + if p := strings.IndexFunc(s, notSemverRune); p >= 0 { + s, prerelease = s[:p], s[p:] + } + if strings.HasSuffix(s, ".") { + s += "0" + } else if strings.Count(s, ".") < 2 { + s += ".0" + } + if prerelease != "" { + // Some release candidates already have a dash in them. + if !strings.HasPrefix(prerelease, "-") { + prerelease = "-" + prerelease + } + s += prerelease + } + return s + } + return "UNKNOWN" +} diff --git a/vendor/golang.org/x/oauth2/google/externalaccount/programmaticrefreshcredsource.go b/vendor/golang.org/x/oauth2/google/externalaccount/programmaticrefreshcredsource.go new file mode 100644 index 000000000..6c1abdf2d --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/externalaccount/programmaticrefreshcredsource.go @@ -0,0 +1,21 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package externalaccount + +import "context" + +type programmaticRefreshCredentialSource struct { + supplierOptions SupplierOptions + subjectTokenSupplier SubjectTokenSupplier + ctx context.Context +} + +func (cs programmaticRefreshCredentialSource) credentialSourceType() string { + return "programmatic" +} + +func (cs programmaticRefreshCredentialSource) subjectToken() (string, error) { + return cs.subjectTokenSupplier.SubjectToken(cs.ctx, cs.supplierOptions) +} diff --git a/vendor/golang.org/x/oauth2/google/externalaccount/urlcredsource.go b/vendor/golang.org/x/oauth2/google/externalaccount/urlcredsource.go new file mode 100644 index 000000000..71a7184e0 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/externalaccount/urlcredsource.go @@ -0,0 +1,79 @@ +// Copyright 2020 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package externalaccount + +import ( + "context" + "encoding/json" + "errors" + "fmt" + "io" + "io/ioutil" + "net/http" + + "golang.org/x/oauth2" +) + +type urlCredentialSource struct { + URL string + Headers map[string]string + Format Format + ctx context.Context +} + +func (cs urlCredentialSource) credentialSourceType() string { + return "url" +} + +func (cs urlCredentialSource) subjectToken() (string, error) { + client := oauth2.NewClient(cs.ctx, nil) + req, err := http.NewRequest("GET", cs.URL, nil) + if err != nil { + return "", fmt.Errorf("oauth2/google/externalaccount: HTTP request for URL-sourced credential failed: %v", err) + } + req = req.WithContext(cs.ctx) + + for key, val := range cs.Headers { + req.Header.Add(key, val) + } + resp, err := client.Do(req) + if err != nil { + return "", fmt.Errorf("oauth2/google/externalaccount: invalid response when retrieving subject token: %v", err) + } + defer resp.Body.Close() + + respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20)) + if err != nil { + return "", fmt.Errorf("oauth2/google/externalaccount: invalid body in subject token URL query: %v", err) + } + if c := resp.StatusCode; c < 200 || c > 299 { + return "", fmt.Errorf("oauth2/google/externalaccount: status code %d: %s", c, respBody) + } + + switch cs.Format.Type { + case "json": + jsonData := make(map[string]interface{}) + err = json.Unmarshal(respBody, &jsonData) + if err != nil { + return "", fmt.Errorf("oauth2/google/externalaccount: failed to unmarshal subject token file: %v", err) + } + val, ok := jsonData[cs.Format.SubjectTokenFieldName] + if !ok { + return "", errors.New("oauth2/google/externalaccount: provided subject_token_field_name not found in credentials") + } + token, ok := val.(string) + if !ok { + return "", errors.New("oauth2/google/externalaccount: improperly formatted subject token") + } + return token, nil + case "text": + return string(respBody), nil + case "": + return string(respBody), nil + default: + return "", errors.New("oauth2/google/externalaccount: invalid credential_source file format type") + } + +} diff --git a/vendor/golang.org/x/oauth2/google/google.go b/vendor/golang.org/x/oauth2/google/google.go new file mode 100644 index 000000000..7b82e7a08 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/google.go @@ -0,0 +1,312 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package google + +import ( + "context" + "encoding/json" + "errors" + "fmt" + "net/url" + "strings" + "time" + + "cloud.google.com/go/compute/metadata" + "golang.org/x/oauth2" + "golang.org/x/oauth2/google/externalaccount" + "golang.org/x/oauth2/google/internal/externalaccountauthorizeduser" + "golang.org/x/oauth2/google/internal/impersonate" + "golang.org/x/oauth2/jwt" +) + +// Endpoint is Google's OAuth 2.0 default endpoint. +var Endpoint = oauth2.Endpoint{ + AuthURL: "https://accounts.google.com/o/oauth2/auth", + TokenURL: "https://oauth2.googleapis.com/token", + DeviceAuthURL: "https://oauth2.googleapis.com/device/code", + AuthStyle: oauth2.AuthStyleInParams, +} + +// MTLSTokenURL is Google's OAuth 2.0 default mTLS endpoint. +const MTLSTokenURL = "https://oauth2.mtls.googleapis.com/token" + +// JWTTokenURL is Google's OAuth 2.0 token URL to use with the JWT flow. +const JWTTokenURL = "https://oauth2.googleapis.com/token" + +// ConfigFromJSON uses a Google Developers Console client_credentials.json +// file to construct a config. +// client_credentials.json can be downloaded from +// https://console.developers.google.com, under "Credentials". Download the Web +// application credentials in the JSON format and provide the contents of the +// file as jsonKey. +func ConfigFromJSON(jsonKey []byte, scope ...string) (*oauth2.Config, error) { + type cred struct { + ClientID string `json:"client_id"` + ClientSecret string `json:"client_secret"` + RedirectURIs []string `json:"redirect_uris"` + AuthURI string `json:"auth_uri"` + TokenURI string `json:"token_uri"` + } + var j struct { + Web *cred `json:"web"` + Installed *cred `json:"installed"` + } + if err := json.Unmarshal(jsonKey, &j); err != nil { + return nil, err + } + var c *cred + switch { + case j.Web != nil: + c = j.Web + case j.Installed != nil: + c = j.Installed + default: + return nil, fmt.Errorf("oauth2/google: no credentials found") + } + if len(c.RedirectURIs) < 1 { + return nil, errors.New("oauth2/google: missing redirect URL in the client_credentials.json") + } + return &oauth2.Config{ + ClientID: c.ClientID, + ClientSecret: c.ClientSecret, + RedirectURL: c.RedirectURIs[0], + Scopes: scope, + Endpoint: oauth2.Endpoint{ + AuthURL: c.AuthURI, + TokenURL: c.TokenURI, + }, + }, nil +} + +// JWTConfigFromJSON uses a Google Developers service account JSON key file to read +// the credentials that authorize and authenticate the requests. +// Create a service account on "Credentials" for your project at +// https://console.developers.google.com to download a JSON key file. +func JWTConfigFromJSON(jsonKey []byte, scope ...string) (*jwt.Config, error) { + var f credentialsFile + if err := json.Unmarshal(jsonKey, &f); err != nil { + return nil, err + } + if f.Type != serviceAccountKey { + return nil, fmt.Errorf("google: read JWT from JSON credentials: 'type' field is %q (expected %q)", f.Type, serviceAccountKey) + } + scope = append([]string(nil), scope...) // copy + return f.jwtConfig(scope, ""), nil +} + +// JSON key file types. +const ( + serviceAccountKey = "service_account" + userCredentialsKey = "authorized_user" + externalAccountKey = "external_account" + externalAccountAuthorizedUserKey = "external_account_authorized_user" + impersonatedServiceAccount = "impersonated_service_account" +) + +// credentialsFile is the unmarshalled representation of a credentials file. +type credentialsFile struct { + Type string `json:"type"` + + // Service Account fields + ClientEmail string `json:"client_email"` + PrivateKeyID string `json:"private_key_id"` + PrivateKey string `json:"private_key"` + AuthURL string `json:"auth_uri"` + TokenURL string `json:"token_uri"` + ProjectID string `json:"project_id"` + UniverseDomain string `json:"universe_domain"` + + // User Credential fields + // (These typically come from gcloud auth.) + ClientSecret string `json:"client_secret"` + ClientID string `json:"client_id"` + RefreshToken string `json:"refresh_token"` + + // External Account fields + Audience string `json:"audience"` + SubjectTokenType string `json:"subject_token_type"` + TokenURLExternal string `json:"token_url"` + TokenInfoURL string `json:"token_info_url"` + ServiceAccountImpersonationURL string `json:"service_account_impersonation_url"` + ServiceAccountImpersonation serviceAccountImpersonationInfo `json:"service_account_impersonation"` + Delegates []string `json:"delegates"` + CredentialSource externalaccount.CredentialSource `json:"credential_source"` + QuotaProjectID string `json:"quota_project_id"` + WorkforcePoolUserProject string `json:"workforce_pool_user_project"` + + // External Account Authorized User fields + RevokeURL string `json:"revoke_url"` + + // Service account impersonation + SourceCredentials *credentialsFile `json:"source_credentials"` +} + +type serviceAccountImpersonationInfo struct { + TokenLifetimeSeconds int `json:"token_lifetime_seconds"` +} + +func (f *credentialsFile) jwtConfig(scopes []string, subject string) *jwt.Config { + cfg := &jwt.Config{ + Email: f.ClientEmail, + PrivateKey: []byte(f.PrivateKey), + PrivateKeyID: f.PrivateKeyID, + Scopes: scopes, + TokenURL: f.TokenURL, + Subject: subject, // This is the user email to impersonate + Audience: f.Audience, + } + if cfg.TokenURL == "" { + cfg.TokenURL = JWTTokenURL + } + return cfg +} + +func (f *credentialsFile) tokenSource(ctx context.Context, params CredentialsParams) (oauth2.TokenSource, error) { + switch f.Type { + case serviceAccountKey: + cfg := f.jwtConfig(params.Scopes, params.Subject) + return cfg.TokenSource(ctx), nil + case userCredentialsKey: + cfg := &oauth2.Config{ + ClientID: f.ClientID, + ClientSecret: f.ClientSecret, + Scopes: params.Scopes, + Endpoint: oauth2.Endpoint{ + AuthURL: f.AuthURL, + TokenURL: f.TokenURL, + AuthStyle: oauth2.AuthStyleInParams, + }, + } + if cfg.Endpoint.AuthURL == "" { + cfg.Endpoint.AuthURL = Endpoint.AuthURL + } + if cfg.Endpoint.TokenURL == "" { + if params.TokenURL != "" { + cfg.Endpoint.TokenURL = params.TokenURL + } else { + cfg.Endpoint.TokenURL = Endpoint.TokenURL + } + } + tok := &oauth2.Token{RefreshToken: f.RefreshToken} + return cfg.TokenSource(ctx, tok), nil + case externalAccountKey: + cfg := &externalaccount.Config{ + Audience: f.Audience, + SubjectTokenType: f.SubjectTokenType, + TokenURL: f.TokenURLExternal, + TokenInfoURL: f.TokenInfoURL, + ServiceAccountImpersonationURL: f.ServiceAccountImpersonationURL, + ServiceAccountImpersonationLifetimeSeconds: f.ServiceAccountImpersonation.TokenLifetimeSeconds, + ClientSecret: f.ClientSecret, + ClientID: f.ClientID, + CredentialSource: &f.CredentialSource, + QuotaProjectID: f.QuotaProjectID, + Scopes: params.Scopes, + WorkforcePoolUserProject: f.WorkforcePoolUserProject, + } + return externalaccount.NewTokenSource(ctx, *cfg) + case externalAccountAuthorizedUserKey: + cfg := &externalaccountauthorizeduser.Config{ + Audience: f.Audience, + RefreshToken: f.RefreshToken, + TokenURL: f.TokenURLExternal, + TokenInfoURL: f.TokenInfoURL, + ClientID: f.ClientID, + ClientSecret: f.ClientSecret, + RevokeURL: f.RevokeURL, + QuotaProjectID: f.QuotaProjectID, + Scopes: params.Scopes, + } + return cfg.TokenSource(ctx) + case impersonatedServiceAccount: + if f.ServiceAccountImpersonationURL == "" || f.SourceCredentials == nil { + return nil, errors.New("missing 'source_credentials' field or 'service_account_impersonation_url' in credentials") + } + + ts, err := f.SourceCredentials.tokenSource(ctx, params) + if err != nil { + return nil, err + } + imp := impersonate.ImpersonateTokenSource{ + Ctx: ctx, + URL: f.ServiceAccountImpersonationURL, + Scopes: params.Scopes, + Ts: ts, + Delegates: f.Delegates, + } + return oauth2.ReuseTokenSource(nil, imp), nil + case "": + return nil, errors.New("missing 'type' field in credentials") + default: + return nil, fmt.Errorf("unknown credential type: %q", f.Type) + } +} + +// ComputeTokenSource returns a token source that fetches access tokens +// from Google Compute Engine (GCE)'s metadata server. It's only valid to use +// this token source if your program is running on a GCE instance. +// If no account is specified, "default" is used. +// If no scopes are specified, a set of default scopes are automatically granted. +// Further information about retrieving access tokens from the GCE metadata +// server can be found at https://cloud.google.com/compute/docs/authentication. +func ComputeTokenSource(account string, scope ...string) oauth2.TokenSource { + // refresh 3 minutes and 45 seconds early. The shortest MDS cache is currently 4 minutes, so any + // refreshes earlier are a waste of compute. + earlyExpirySecs := 225 * time.Second + return computeTokenSource(account, earlyExpirySecs, scope...) +} + +func computeTokenSource(account string, earlyExpiry time.Duration, scope ...string) oauth2.TokenSource { + return oauth2.ReuseTokenSourceWithExpiry(nil, computeSource{account: account, scopes: scope}, earlyExpiry) +} + +type computeSource struct { + account string + scopes []string +} + +func (cs computeSource) Token() (*oauth2.Token, error) { + if !metadata.OnGCE() { + return nil, errors.New("oauth2/google: can't get a token from the metadata service; not running on GCE") + } + acct := cs.account + if acct == "" { + acct = "default" + } + tokenURI := "instance/service-accounts/" + acct + "/token" + if len(cs.scopes) > 0 { + v := url.Values{} + v.Set("scopes", strings.Join(cs.scopes, ",")) + tokenURI = tokenURI + "?" + v.Encode() + } + tokenJSON, err := metadata.Get(tokenURI) + if err != nil { + return nil, err + } + var res struct { + AccessToken string `json:"access_token"` + ExpiresInSec int `json:"expires_in"` + TokenType string `json:"token_type"` + } + err = json.NewDecoder(strings.NewReader(tokenJSON)).Decode(&res) + if err != nil { + return nil, fmt.Errorf("oauth2/google: invalid token JSON from metadata: %v", err) + } + if res.ExpiresInSec == 0 || res.AccessToken == "" { + return nil, fmt.Errorf("oauth2/google: incomplete token received from metadata") + } + tok := &oauth2.Token{ + AccessToken: res.AccessToken, + TokenType: res.TokenType, + Expiry: time.Now().Add(time.Duration(res.ExpiresInSec) * time.Second), + } + // NOTE(cbro): add hidden metadata about where the token is from. + // This is needed for detection by client libraries to know that credentials come from the metadata server. + // This may be removed in a future version of this library. + return tok.WithExtra(map[string]interface{}{ + "oauth2.google.tokenSource": "compute-metadata", + "oauth2.google.serviceAccount": acct, + }), nil +} diff --git a/vendor/golang.org/x/oauth2/google/internal/externalaccountauthorizeduser/externalaccountauthorizeduser.go b/vendor/golang.org/x/oauth2/google/internal/externalaccountauthorizeduser/externalaccountauthorizeduser.go new file mode 100644 index 000000000..cb5820707 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/internal/externalaccountauthorizeduser/externalaccountauthorizeduser.go @@ -0,0 +1,114 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package externalaccountauthorizeduser + +import ( + "context" + "errors" + "time" + + "golang.org/x/oauth2" + "golang.org/x/oauth2/google/internal/stsexchange" +) + +// now aliases time.Now for testing. +var now = func() time.Time { + return time.Now().UTC() +} + +var tokenValid = func(token oauth2.Token) bool { + return token.Valid() +} + +type Config struct { + // Audience is the Secure Token Service (STS) audience which contains the resource name for the workforce pool and + // the provider identifier in that pool. + Audience string + // RefreshToken is the optional OAuth 2.0 refresh token. If specified, credentials can be refreshed. + RefreshToken string + // TokenURL is the optional STS token exchange endpoint for refresh. Must be specified for refresh, can be left as + // None if the token can not be refreshed. + TokenURL string + // TokenInfoURL is the optional STS endpoint URL for token introspection. + TokenInfoURL string + // ClientID is only required in conjunction with ClientSecret, as described above. + ClientID string + // ClientSecret is currently only required if token_info endpoint also needs to be called with the generated GCP + // access token. When provided, STS will be called with additional basic authentication using client_id as username + // and client_secret as password. + ClientSecret string + // Token is the OAuth2.0 access token. Can be nil if refresh information is provided. + Token string + // Expiry is the optional expiration datetime of the OAuth 2.0 access token. + Expiry time.Time + // RevokeURL is the optional STS endpoint URL for revoking tokens. + RevokeURL string + // QuotaProjectID is the optional project ID used for quota and billing. This project may be different from the + // project used to create the credentials. + QuotaProjectID string + Scopes []string +} + +func (c *Config) canRefresh() bool { + return c.ClientID != "" && c.ClientSecret != "" && c.RefreshToken != "" && c.TokenURL != "" +} + +func (c *Config) TokenSource(ctx context.Context) (oauth2.TokenSource, error) { + var token oauth2.Token + if c.Token != "" && !c.Expiry.IsZero() { + token = oauth2.Token{ + AccessToken: c.Token, + Expiry: c.Expiry, + TokenType: "Bearer", + } + } + if !tokenValid(token) && !c.canRefresh() { + return nil, errors.New("oauth2/google: Token should be created with fields to make it valid (`token` and `expiry`), or fields to allow it to refresh (`refresh_token`, `token_url`, `client_id`, `client_secret`).") + } + + ts := tokenSource{ + ctx: ctx, + conf: c, + } + + return oauth2.ReuseTokenSource(&token, ts), nil +} + +type tokenSource struct { + ctx context.Context + conf *Config +} + +func (ts tokenSource) Token() (*oauth2.Token, error) { + conf := ts.conf + if !conf.canRefresh() { + return nil, errors.New("oauth2/google: The credentials do not contain the necessary fields need to refresh the access token. You must specify refresh_token, token_url, client_id, and client_secret.") + } + + clientAuth := stsexchange.ClientAuthentication{ + AuthStyle: oauth2.AuthStyleInHeader, + ClientID: conf.ClientID, + ClientSecret: conf.ClientSecret, + } + + stsResponse, err := stsexchange.RefreshAccessToken(ts.ctx, conf.TokenURL, conf.RefreshToken, clientAuth, nil) + if err != nil { + return nil, err + } + if stsResponse.ExpiresIn < 0 { + return nil, errors.New("oauth2/google: got invalid expiry from security token service") + } + + if stsResponse.RefreshToken != "" { + conf.RefreshToken = stsResponse.RefreshToken + } + + token := &oauth2.Token{ + AccessToken: stsResponse.AccessToken, + Expiry: now().Add(time.Duration(stsResponse.ExpiresIn) * time.Second), + TokenType: "Bearer", + } + return token, nil +} diff --git a/vendor/golang.org/x/oauth2/google/internal/impersonate/impersonate.go b/vendor/golang.org/x/oauth2/google/internal/impersonate/impersonate.go new file mode 100644 index 000000000..6bc3af110 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/internal/impersonate/impersonate.go @@ -0,0 +1,105 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package impersonate + +import ( + "bytes" + "context" + "encoding/json" + "fmt" + "io" + "io/ioutil" + "net/http" + "time" + + "golang.org/x/oauth2" +) + +// generateAccesstokenReq is used for service account impersonation +type generateAccessTokenReq struct { + Delegates []string `json:"delegates,omitempty"` + Lifetime string `json:"lifetime,omitempty"` + Scope []string `json:"scope,omitempty"` +} + +type impersonateTokenResponse struct { + AccessToken string `json:"accessToken"` + ExpireTime string `json:"expireTime"` +} + +// ImpersonateTokenSource uses a source credential, stored in Ts, to request an access token to the provided URL. +// Scopes can be defined when the access token is requested. +type ImpersonateTokenSource struct { + // Ctx is the execution context of the impersonation process + // used to perform http call to the URL. Required + Ctx context.Context + // Ts is the source credential used to generate a token on the + // impersonated service account. Required. + Ts oauth2.TokenSource + + // URL is the endpoint to call to generate a token + // on behalf the service account. Required. + URL string + // Scopes that the impersonated credential should have. Required. + Scopes []string + // Delegates are the service account email addresses in a delegation chain. + // Each service account must be granted roles/iam.serviceAccountTokenCreator + // on the next service account in the chain. Optional. + Delegates []string + // TokenLifetimeSeconds is the number of seconds the impersonation token will + // be valid for. + TokenLifetimeSeconds int +} + +// Token performs the exchange to get a temporary service account token to allow access to GCP. +func (its ImpersonateTokenSource) Token() (*oauth2.Token, error) { + lifetimeString := "3600s" + if its.TokenLifetimeSeconds != 0 { + lifetimeString = fmt.Sprintf("%ds", its.TokenLifetimeSeconds) + } + reqBody := generateAccessTokenReq{ + Lifetime: lifetimeString, + Scope: its.Scopes, + Delegates: its.Delegates, + } + b, err := json.Marshal(reqBody) + if err != nil { + return nil, fmt.Errorf("oauth2/google: unable to marshal request: %v", err) + } + client := oauth2.NewClient(its.Ctx, its.Ts) + req, err := http.NewRequest("POST", its.URL, bytes.NewReader(b)) + if err != nil { + return nil, fmt.Errorf("oauth2/google: unable to create impersonation request: %v", err) + } + req = req.WithContext(its.Ctx) + req.Header.Set("Content-Type", "application/json") + + resp, err := client.Do(req) + if err != nil { + return nil, fmt.Errorf("oauth2/google: unable to generate access token: %v", err) + } + defer resp.Body.Close() + body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20)) + if err != nil { + return nil, fmt.Errorf("oauth2/google: unable to read body: %v", err) + } + if c := resp.StatusCode; c < 200 || c > 299 { + return nil, fmt.Errorf("oauth2/google: status code %d: %s", c, body) + } + + var accessTokenResp impersonateTokenResponse + if err := json.Unmarshal(body, &accessTokenResp); err != nil { + return nil, fmt.Errorf("oauth2/google: unable to parse response: %v", err) + } + expiry, err := time.Parse(time.RFC3339, accessTokenResp.ExpireTime) + if err != nil { + return nil, fmt.Errorf("oauth2/google: unable to parse expiry: %v", err) + } + return &oauth2.Token{ + AccessToken: accessTokenResp.AccessToken, + Expiry: expiry, + TokenType: "Bearer", + }, nil +} diff --git a/vendor/golang.org/x/oauth2/google/internal/stsexchange/clientauth.go b/vendor/golang.org/x/oauth2/google/internal/stsexchange/clientauth.go new file mode 100644 index 000000000..ebd520eac --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/internal/stsexchange/clientauth.go @@ -0,0 +1,45 @@ +// Copyright 2020 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package stsexchange + +import ( + "encoding/base64" + "net/http" + "net/url" + + "golang.org/x/oauth2" +) + +// ClientAuthentication represents an OAuth client ID and secret and the mechanism for passing these credentials as stated in rfc6749#2.3.1. +type ClientAuthentication struct { + // AuthStyle can be either basic or request-body + AuthStyle oauth2.AuthStyle + ClientID string + ClientSecret string +} + +// InjectAuthentication is used to add authentication to a Secure Token Service exchange +// request. It modifies either the passed url.Values or http.Header depending on the desired +// authentication format. +func (c *ClientAuthentication) InjectAuthentication(values url.Values, headers http.Header) { + if c.ClientID == "" || c.ClientSecret == "" || values == nil || headers == nil { + return + } + + switch c.AuthStyle { + case oauth2.AuthStyleInHeader: // AuthStyleInHeader corresponds to basic authentication as defined in rfc7617#2 + plainHeader := c.ClientID + ":" + c.ClientSecret + headers.Add("Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(plainHeader))) + case oauth2.AuthStyleInParams: // AuthStyleInParams corresponds to request-body authentication with ClientID and ClientSecret in the message body. + values.Set("client_id", c.ClientID) + values.Set("client_secret", c.ClientSecret) + case oauth2.AuthStyleAutoDetect: + values.Set("client_id", c.ClientID) + values.Set("client_secret", c.ClientSecret) + default: + values.Set("client_id", c.ClientID) + values.Set("client_secret", c.ClientSecret) + } +} diff --git a/vendor/golang.org/x/oauth2/google/internal/stsexchange/sts_exchange.go b/vendor/golang.org/x/oauth2/google/internal/stsexchange/sts_exchange.go new file mode 100644 index 000000000..1a0bebd15 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/internal/stsexchange/sts_exchange.go @@ -0,0 +1,125 @@ +// Copyright 2020 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package stsexchange + +import ( + "context" + "encoding/json" + "fmt" + "io" + "io/ioutil" + "net/http" + "net/url" + "strconv" + "strings" + + "golang.org/x/oauth2" +) + +func defaultHeader() http.Header { + header := make(http.Header) + header.Add("Content-Type", "application/x-www-form-urlencoded") + return header +} + +// ExchangeToken performs an oauth2 token exchange with the provided endpoint. +// The first 4 fields are all mandatory. headers can be used to pass additional +// headers beyond the bare minimum required by the token exchange. options can +// be used to pass additional JSON-structured options to the remote server. +func ExchangeToken(ctx context.Context, endpoint string, request *TokenExchangeRequest, authentication ClientAuthentication, headers http.Header, options map[string]interface{}) (*Response, error) { + data := url.Values{} + data.Set("audience", request.Audience) + data.Set("grant_type", "urn:ietf:params:oauth:grant-type:token-exchange") + data.Set("requested_token_type", "urn:ietf:params:oauth:token-type:access_token") + data.Set("subject_token_type", request.SubjectTokenType) + data.Set("subject_token", request.SubjectToken) + data.Set("scope", strings.Join(request.Scope, " ")) + if options != nil { + opts, err := json.Marshal(options) + if err != nil { + return nil, fmt.Errorf("oauth2/google: failed to marshal additional options: %v", err) + } + data.Set("options", string(opts)) + } + + return makeRequest(ctx, endpoint, data, authentication, headers) +} + +func RefreshAccessToken(ctx context.Context, endpoint string, refreshToken string, authentication ClientAuthentication, headers http.Header) (*Response, error) { + data := url.Values{} + data.Set("grant_type", "refresh_token") + data.Set("refresh_token", refreshToken) + + return makeRequest(ctx, endpoint, data, authentication, headers) +} + +func makeRequest(ctx context.Context, endpoint string, data url.Values, authentication ClientAuthentication, headers http.Header) (*Response, error) { + if headers == nil { + headers = defaultHeader() + } + client := oauth2.NewClient(ctx, nil) + authentication.InjectAuthentication(data, headers) + encodedData := data.Encode() + + req, err := http.NewRequest("POST", endpoint, strings.NewReader(encodedData)) + if err != nil { + return nil, fmt.Errorf("oauth2/google: failed to properly build http request: %v", err) + } + req = req.WithContext(ctx) + for key, list := range headers { + for _, val := range list { + req.Header.Add(key, val) + } + } + req.Header.Add("Content-Length", strconv.Itoa(len(encodedData))) + + resp, err := client.Do(req) + + if err != nil { + return nil, fmt.Errorf("oauth2/google: invalid response from Secure Token Server: %v", err) + } + defer resp.Body.Close() + + body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20)) + if err != nil { + return nil, err + } + if c := resp.StatusCode; c < 200 || c > 299 { + return nil, fmt.Errorf("oauth2/google: status code %d: %s", c, body) + } + var stsResp Response + err = json.Unmarshal(body, &stsResp) + if err != nil { + return nil, fmt.Errorf("oauth2/google: failed to unmarshal response body from Secure Token Server: %v", err) + + } + + return &stsResp, nil +} + +// TokenExchangeRequest contains fields necessary to make an oauth2 token exchange. +type TokenExchangeRequest struct { + ActingParty struct { + ActorToken string + ActorTokenType string + } + GrantType string + Resource string + Audience string + Scope []string + RequestedTokenType string + SubjectToken string + SubjectTokenType string +} + +// Response is used to decode the remote server response during an oauth2 token exchange. +type Response struct { + AccessToken string `json:"access_token"` + IssuedTokenType string `json:"issued_token_type"` + TokenType string `json:"token_type"` + ExpiresIn int `json:"expires_in"` + Scope string `json:"scope"` + RefreshToken string `json:"refresh_token"` +} diff --git a/vendor/golang.org/x/oauth2/google/jwt.go b/vendor/golang.org/x/oauth2/google/jwt.go new file mode 100644 index 000000000..e89e6ae17 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/jwt.go @@ -0,0 +1,102 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package google + +import ( + "crypto/rsa" + "fmt" + "strings" + "time" + + "golang.org/x/oauth2" + "golang.org/x/oauth2/internal" + "golang.org/x/oauth2/jws" +) + +// JWTAccessTokenSourceFromJSON uses a Google Developers service account JSON +// key file to read the credentials that authorize and authenticate the +// requests, and returns a TokenSource that does not use any OAuth2 flow but +// instead creates a JWT and sends that as the access token. +// The audience is typically a URL that specifies the scope of the credentials. +// +// Note that this is not a standard OAuth flow, but rather an +// optimization supported by a few Google services. +// Unless you know otherwise, you should use JWTConfigFromJSON instead. +func JWTAccessTokenSourceFromJSON(jsonKey []byte, audience string) (oauth2.TokenSource, error) { + return newJWTSource(jsonKey, audience, nil) +} + +// JWTAccessTokenSourceWithScope uses a Google Developers service account JSON +// key file to read the credentials that authorize and authenticate the +// requests, and returns a TokenSource that does not use any OAuth2 flow but +// instead creates a JWT and sends that as the access token. +// The scope is typically a list of URLs that specifies the scope of the +// credentials. +// +// Note that this is not a standard OAuth flow, but rather an +// optimization supported by a few Google services. +// Unless you know otherwise, you should use JWTConfigFromJSON instead. +func JWTAccessTokenSourceWithScope(jsonKey []byte, scope ...string) (oauth2.TokenSource, error) { + return newJWTSource(jsonKey, "", scope) +} + +func newJWTSource(jsonKey []byte, audience string, scopes []string) (oauth2.TokenSource, error) { + if len(scopes) == 0 && audience == "" { + return nil, fmt.Errorf("google: missing scope/audience for JWT access token") + } + + cfg, err := JWTConfigFromJSON(jsonKey) + if err != nil { + return nil, fmt.Errorf("google: could not parse JSON key: %v", err) + } + pk, err := internal.ParseKey(cfg.PrivateKey) + if err != nil { + return nil, fmt.Errorf("google: could not parse key: %v", err) + } + ts := &jwtAccessTokenSource{ + email: cfg.Email, + audience: audience, + scopes: scopes, + pk: pk, + pkID: cfg.PrivateKeyID, + } + tok, err := ts.Token() + if err != nil { + return nil, err + } + rts := newErrWrappingTokenSource(oauth2.ReuseTokenSource(tok, ts)) + return rts, nil +} + +type jwtAccessTokenSource struct { + email, audience string + scopes []string + pk *rsa.PrivateKey + pkID string +} + +func (ts *jwtAccessTokenSource) Token() (*oauth2.Token, error) { + iat := time.Now() + exp := iat.Add(time.Hour) + scope := strings.Join(ts.scopes, " ") + cs := &jws.ClaimSet{ + Iss: ts.email, + Sub: ts.email, + Aud: ts.audience, + Scope: scope, + Iat: iat.Unix(), + Exp: exp.Unix(), + } + hdr := &jws.Header{ + Algorithm: "RS256", + Typ: "JWT", + KeyID: string(ts.pkID), + } + msg, err := jws.Encode(hdr, cs, ts.pk) + if err != nil { + return nil, fmt.Errorf("google: could not encode JWT: %v", err) + } + return &oauth2.Token{AccessToken: msg, TokenType: "Bearer", Expiry: exp}, nil +} diff --git a/vendor/golang.org/x/oauth2/google/sdk.go b/vendor/golang.org/x/oauth2/google/sdk.go new file mode 100644 index 000000000..456224bc7 --- /dev/null +++ b/vendor/golang.org/x/oauth2/google/sdk.go @@ -0,0 +1,201 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package google + +import ( + "bufio" + "context" + "encoding/json" + "errors" + "fmt" + "io" + "net/http" + "os" + "os/user" + "path/filepath" + "runtime" + "strings" + "time" + + "golang.org/x/oauth2" +) + +type sdkCredentials struct { + Data []struct { + Credential struct { + ClientID string `json:"client_id"` + ClientSecret string `json:"client_secret"` + AccessToken string `json:"access_token"` + RefreshToken string `json:"refresh_token"` + TokenExpiry *time.Time `json:"token_expiry"` + } `json:"credential"` + Key struct { + Account string `json:"account"` + Scope string `json:"scope"` + } `json:"key"` + } +} + +// An SDKConfig provides access to tokens from an account already +// authorized via the Google Cloud SDK. +type SDKConfig struct { + conf oauth2.Config + initialToken *oauth2.Token +} + +// NewSDKConfig creates an SDKConfig for the given Google Cloud SDK +// account. If account is empty, the account currently active in +// Google Cloud SDK properties is used. +// Google Cloud SDK credentials must be created by running `gcloud auth` +// before using this function. +// The Google Cloud SDK is available at https://cloud.google.com/sdk/. +func NewSDKConfig(account string) (*SDKConfig, error) { + configPath, err := sdkConfigPath() + if err != nil { + return nil, fmt.Errorf("oauth2/google: error getting SDK config path: %v", err) + } + credentialsPath := filepath.Join(configPath, "credentials") + f, err := os.Open(credentialsPath) + if err != nil { + return nil, fmt.Errorf("oauth2/google: failed to load SDK credentials: %v", err) + } + defer f.Close() + + var c sdkCredentials + if err := json.NewDecoder(f).Decode(&c); err != nil { + return nil, fmt.Errorf("oauth2/google: failed to decode SDK credentials from %q: %v", credentialsPath, err) + } + if len(c.Data) == 0 { + return nil, fmt.Errorf("oauth2/google: no credentials found in %q, run `gcloud auth login` to create one", credentialsPath) + } + if account == "" { + propertiesPath := filepath.Join(configPath, "properties") + f, err := os.Open(propertiesPath) + if err != nil { + return nil, fmt.Errorf("oauth2/google: failed to load SDK properties: %v", err) + } + defer f.Close() + ini, err := parseINI(f) + if err != nil { + return nil, fmt.Errorf("oauth2/google: failed to parse SDK properties %q: %v", propertiesPath, err) + } + core, ok := ini["core"] + if !ok { + return nil, fmt.Errorf("oauth2/google: failed to find [core] section in %v", ini) + } + active, ok := core["account"] + if !ok { + return nil, fmt.Errorf("oauth2/google: failed to find %q attribute in %v", "account", core) + } + account = active + } + + for _, d := range c.Data { + if account == "" || d.Key.Account == account { + if d.Credential.AccessToken == "" && d.Credential.RefreshToken == "" { + return nil, fmt.Errorf("oauth2/google: no token available for account %q", account) + } + var expiry time.Time + if d.Credential.TokenExpiry != nil { + expiry = *d.Credential.TokenExpiry + } + return &SDKConfig{ + conf: oauth2.Config{ + ClientID: d.Credential.ClientID, + ClientSecret: d.Credential.ClientSecret, + Scopes: strings.Split(d.Key.Scope, " "), + Endpoint: Endpoint, + RedirectURL: "oob", + }, + initialToken: &oauth2.Token{ + AccessToken: d.Credential.AccessToken, + RefreshToken: d.Credential.RefreshToken, + Expiry: expiry, + }, + }, nil + } + } + return nil, fmt.Errorf("oauth2/google: no such credentials for account %q", account) +} + +// Client returns an HTTP client using Google Cloud SDK credentials to +// authorize requests. The token will auto-refresh as necessary. The +// underlying http.RoundTripper will be obtained using the provided +// context. The returned client and its Transport should not be +// modified. +func (c *SDKConfig) Client(ctx context.Context) *http.Client { + return &http.Client{ + Transport: &oauth2.Transport{ + Source: c.TokenSource(ctx), + }, + } +} + +// TokenSource returns an oauth2.TokenSource that retrieve tokens from +// Google Cloud SDK credentials using the provided context. +// It will returns the current access token stored in the credentials, +// and refresh it when it expires, but it won't update the credentials +// with the new access token. +func (c *SDKConfig) TokenSource(ctx context.Context) oauth2.TokenSource { + return c.conf.TokenSource(ctx, c.initialToken) +} + +// Scopes are the OAuth 2.0 scopes the current account is authorized for. +func (c *SDKConfig) Scopes() []string { + return c.conf.Scopes +} + +func parseINI(ini io.Reader) (map[string]map[string]string, error) { + result := map[string]map[string]string{ + "": {}, // root section + } + scanner := bufio.NewScanner(ini) + currentSection := "" + for scanner.Scan() { + line := strings.TrimSpace(scanner.Text()) + if strings.HasPrefix(line, ";") { + // comment. + continue + } + if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") { + currentSection = strings.TrimSpace(line[1 : len(line)-1]) + result[currentSection] = map[string]string{} + continue + } + parts := strings.SplitN(line, "=", 2) + if len(parts) == 2 && parts[0] != "" { + result[currentSection][strings.TrimSpace(parts[0])] = strings.TrimSpace(parts[1]) + } + } + if err := scanner.Err(); err != nil { + return nil, fmt.Errorf("error scanning ini: %v", err) + } + return result, nil +} + +// sdkConfigPath tries to guess where the gcloud config is located. +// It can be overridden during tests. +var sdkConfigPath = func() (string, error) { + if runtime.GOOS == "windows" { + return filepath.Join(os.Getenv("APPDATA"), "gcloud"), nil + } + homeDir := guessUnixHomeDir() + if homeDir == "" { + return "", errors.New("unable to get current user home directory: os/user lookup failed; $HOME is empty") + } + return filepath.Join(homeDir, ".config", "gcloud"), nil +} + +func guessUnixHomeDir() string { + // Prefer $HOME over user.Current due to glibc bug: golang.org/issue/13470 + if v := os.Getenv("HOME"); v != "" { + return v + } + // Else, fall back to user.Current: + if u, err := user.Current(); err == nil { + return u.HomeDir + } + return "" +} diff --git a/vendor/golang.org/x/oauth2/internal/doc.go b/vendor/golang.org/x/oauth2/internal/doc.go new file mode 100644 index 000000000..03265e888 --- /dev/null +++ b/vendor/golang.org/x/oauth2/internal/doc.go @@ -0,0 +1,6 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package internal contains support packages for oauth2 package. +package internal diff --git a/vendor/golang.org/x/oauth2/internal/oauth2.go b/vendor/golang.org/x/oauth2/internal/oauth2.go new file mode 100644 index 000000000..14989beaf --- /dev/null +++ b/vendor/golang.org/x/oauth2/internal/oauth2.go @@ -0,0 +1,37 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package internal + +import ( + "crypto/rsa" + "crypto/x509" + "encoding/pem" + "errors" + "fmt" +) + +// ParseKey converts the binary contents of a private key file +// to an *rsa.PrivateKey. It detects whether the private key is in a +// PEM container or not. If so, it extracts the private key +// from PEM container before conversion. It only supports PEM +// containers with no passphrase. +func ParseKey(key []byte) (*rsa.PrivateKey, error) { + block, _ := pem.Decode(key) + if block != nil { + key = block.Bytes + } + parsedKey, err := x509.ParsePKCS8PrivateKey(key) + if err != nil { + parsedKey, err = x509.ParsePKCS1PrivateKey(key) + if err != nil { + return nil, fmt.Errorf("private key should be a PEM or plain PKCS1 or PKCS8; parse error: %v", err) + } + } + parsed, ok := parsedKey.(*rsa.PrivateKey) + if !ok { + return nil, errors.New("private key is invalid") + } + return parsed, nil +} diff --git a/vendor/golang.org/x/oauth2/internal/token.go b/vendor/golang.org/x/oauth2/internal/token.go new file mode 100644 index 000000000..e83ddeef0 --- /dev/null +++ b/vendor/golang.org/x/oauth2/internal/token.go @@ -0,0 +1,352 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package internal + +import ( + "context" + "encoding/json" + "errors" + "fmt" + "io" + "io/ioutil" + "math" + "mime" + "net/http" + "net/url" + "strconv" + "strings" + "sync" + "sync/atomic" + "time" +) + +// Token represents the credentials used to authorize +// the requests to access protected resources on the OAuth 2.0 +// provider's backend. +// +// This type is a mirror of oauth2.Token and exists to break +// an otherwise-circular dependency. Other internal packages +// should convert this Token into an oauth2.Token before use. +type Token struct { + // AccessToken is the token that authorizes and authenticates + // the requests. + AccessToken string + + // TokenType is the type of token. + // The Type method returns either this or "Bearer", the default. + TokenType string + + // RefreshToken is a token that's used by the application + // (as opposed to the user) to refresh the access token + // if it expires. + RefreshToken string + + // Expiry is the optional expiration time of the access token. + // + // If zero, TokenSource implementations will reuse the same + // token forever and RefreshToken or equivalent + // mechanisms for that TokenSource will not be used. + Expiry time.Time + + // Raw optionally contains extra metadata from the server + // when updating a token. + Raw interface{} +} + +// tokenJSON is the struct representing the HTTP response from OAuth2 +// providers returning a token or error in JSON form. +// https://datatracker.ietf.org/doc/html/rfc6749#section-5.1 +type tokenJSON struct { + AccessToken string `json:"access_token"` + TokenType string `json:"token_type"` + RefreshToken string `json:"refresh_token"` + ExpiresIn expirationTime `json:"expires_in"` // at least PayPal returns string, while most return number + // error fields + // https://datatracker.ietf.org/doc/html/rfc6749#section-5.2 + ErrorCode string `json:"error"` + ErrorDescription string `json:"error_description"` + ErrorURI string `json:"error_uri"` +} + +func (e *tokenJSON) expiry() (t time.Time) { + if v := e.ExpiresIn; v != 0 { + return time.Now().Add(time.Duration(v) * time.Second) + } + return +} + +type expirationTime int32 + +func (e *expirationTime) UnmarshalJSON(b []byte) error { + if len(b) == 0 || string(b) == "null" { + return nil + } + var n json.Number + err := json.Unmarshal(b, &n) + if err != nil { + return err + } + i, err := n.Int64() + if err != nil { + return err + } + if i > math.MaxInt32 { + i = math.MaxInt32 + } + *e = expirationTime(i) + return nil +} + +// RegisterBrokenAuthHeaderProvider previously did something. It is now a no-op. +// +// Deprecated: this function no longer does anything. Caller code that +// wants to avoid potential extra HTTP requests made during +// auto-probing of the provider's auth style should set +// Endpoint.AuthStyle. +func RegisterBrokenAuthHeaderProvider(tokenURL string) {} + +// AuthStyle is a copy of the golang.org/x/oauth2 package's AuthStyle type. +type AuthStyle int + +const ( + AuthStyleUnknown AuthStyle = 0 + AuthStyleInParams AuthStyle = 1 + AuthStyleInHeader AuthStyle = 2 +) + +// LazyAuthStyleCache is a backwards compatibility compromise to let Configs +// have a lazily-initialized AuthStyleCache. +// +// The two users of this, oauth2.Config and oauth2/clientcredentials.Config, +// both would ideally just embed an unexported AuthStyleCache but because both +// were historically allowed to be copied by value we can't retroactively add an +// uncopyable Mutex to them. +// +// We could use an atomic.Pointer, but that was added recently enough (in Go +// 1.18) that we'd break Go 1.17 users where the tests as of 2023-08-03 +// still pass. By using an atomic.Value, it supports both Go 1.17 and +// copying by value, even if that's not ideal. +type LazyAuthStyleCache struct { + v atomic.Value // of *AuthStyleCache +} + +func (lc *LazyAuthStyleCache) Get() *AuthStyleCache { + if c, ok := lc.v.Load().(*AuthStyleCache); ok { + return c + } + c := new(AuthStyleCache) + if !lc.v.CompareAndSwap(nil, c) { + c = lc.v.Load().(*AuthStyleCache) + } + return c +} + +// AuthStyleCache is the set of tokenURLs we've successfully used via +// RetrieveToken and which style auth we ended up using. +// It's called a cache, but it doesn't (yet?) shrink. It's expected that +// the set of OAuth2 servers a program contacts over time is fixed and +// small. +type AuthStyleCache struct { + mu sync.Mutex + m map[string]AuthStyle // keyed by tokenURL +} + +// lookupAuthStyle reports which auth style we last used with tokenURL +// when calling RetrieveToken and whether we have ever done so. +func (c *AuthStyleCache) lookupAuthStyle(tokenURL string) (style AuthStyle, ok bool) { + c.mu.Lock() + defer c.mu.Unlock() + style, ok = c.m[tokenURL] + return +} + +// setAuthStyle adds an entry to authStyleCache, documented above. +func (c *AuthStyleCache) setAuthStyle(tokenURL string, v AuthStyle) { + c.mu.Lock() + defer c.mu.Unlock() + if c.m == nil { + c.m = make(map[string]AuthStyle) + } + c.m[tokenURL] = v +} + +// newTokenRequest returns a new *http.Request to retrieve a new token +// from tokenURL using the provided clientID, clientSecret, and POST +// body parameters. +// +// inParams is whether the clientID & clientSecret should be encoded +// as the POST body. An 'inParams' value of true means to send it in +// the POST body (along with any values in v); false means to send it +// in the Authorization header. +func newTokenRequest(tokenURL, clientID, clientSecret string, v url.Values, authStyle AuthStyle) (*http.Request, error) { + if authStyle == AuthStyleInParams { + v = cloneURLValues(v) + if clientID != "" { + v.Set("client_id", clientID) + } + if clientSecret != "" { + v.Set("client_secret", clientSecret) + } + } + req, err := http.NewRequest("POST", tokenURL, strings.NewReader(v.Encode())) + if err != nil { + return nil, err + } + req.Header.Set("Content-Type", "application/x-www-form-urlencoded") + if authStyle == AuthStyleInHeader { + req.SetBasicAuth(url.QueryEscape(clientID), url.QueryEscape(clientSecret)) + } + return req, nil +} + +func cloneURLValues(v url.Values) url.Values { + v2 := make(url.Values, len(v)) + for k, vv := range v { + v2[k] = append([]string(nil), vv...) + } + return v2 +} + +func RetrieveToken(ctx context.Context, clientID, clientSecret, tokenURL string, v url.Values, authStyle AuthStyle, styleCache *AuthStyleCache) (*Token, error) { + needsAuthStyleProbe := authStyle == 0 + if needsAuthStyleProbe { + if style, ok := styleCache.lookupAuthStyle(tokenURL); ok { + authStyle = style + needsAuthStyleProbe = false + } else { + authStyle = AuthStyleInHeader // the first way we'll try + } + } + req, err := newTokenRequest(tokenURL, clientID, clientSecret, v, authStyle) + if err != nil { + return nil, err + } + token, err := doTokenRoundTrip(ctx, req) + if err != nil && needsAuthStyleProbe { + // If we get an error, assume the server wants the + // clientID & clientSecret in a different form. + // See https://code.google.com/p/goauth2/issues/detail?id=31 for background. + // In summary: + // - Reddit only accepts client secret in the Authorization header + // - Dropbox accepts either it in URL param or Auth header, but not both. + // - Google only accepts URL param (not spec compliant?), not Auth header + // - Stripe only accepts client secret in Auth header with Bearer method, not Basic + // + // We used to maintain a big table in this code of all the sites and which way + // they went, but maintaining it didn't scale & got annoying. + // So just try both ways. + authStyle = AuthStyleInParams // the second way we'll try + req, _ = newTokenRequest(tokenURL, clientID, clientSecret, v, authStyle) + token, err = doTokenRoundTrip(ctx, req) + } + if needsAuthStyleProbe && err == nil { + styleCache.setAuthStyle(tokenURL, authStyle) + } + // Don't overwrite `RefreshToken` with an empty value + // if this was a token refreshing request. + if token != nil && token.RefreshToken == "" { + token.RefreshToken = v.Get("refresh_token") + } + return token, err +} + +func doTokenRoundTrip(ctx context.Context, req *http.Request) (*Token, error) { + r, err := ContextClient(ctx).Do(req.WithContext(ctx)) + if err != nil { + return nil, err + } + body, err := ioutil.ReadAll(io.LimitReader(r.Body, 1<<20)) + r.Body.Close() + if err != nil { + return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err) + } + + failureStatus := r.StatusCode < 200 || r.StatusCode > 299 + retrieveError := &RetrieveError{ + Response: r, + Body: body, + // attempt to populate error detail below + } + + var token *Token + content, _, _ := mime.ParseMediaType(r.Header.Get("Content-Type")) + switch content { + case "application/x-www-form-urlencoded", "text/plain": + // some endpoints return a query string + vals, err := url.ParseQuery(string(body)) + if err != nil { + if failureStatus { + return nil, retrieveError + } + return nil, fmt.Errorf("oauth2: cannot parse response: %v", err) + } + retrieveError.ErrorCode = vals.Get("error") + retrieveError.ErrorDescription = vals.Get("error_description") + retrieveError.ErrorURI = vals.Get("error_uri") + token = &Token{ + AccessToken: vals.Get("access_token"), + TokenType: vals.Get("token_type"), + RefreshToken: vals.Get("refresh_token"), + Raw: vals, + } + e := vals.Get("expires_in") + expires, _ := strconv.Atoi(e) + if expires != 0 { + token.Expiry = time.Now().Add(time.Duration(expires) * time.Second) + } + default: + var tj tokenJSON + if err = json.Unmarshal(body, &tj); err != nil { + if failureStatus { + return nil, retrieveError + } + return nil, fmt.Errorf("oauth2: cannot parse json: %v", err) + } + retrieveError.ErrorCode = tj.ErrorCode + retrieveError.ErrorDescription = tj.ErrorDescription + retrieveError.ErrorURI = tj.ErrorURI + token = &Token{ + AccessToken: tj.AccessToken, + TokenType: tj.TokenType, + RefreshToken: tj.RefreshToken, + Expiry: tj.expiry(), + Raw: make(map[string]interface{}), + } + json.Unmarshal(body, &token.Raw) // no error checks for optional fields + } + // according to spec, servers should respond status 400 in error case + // https://www.rfc-editor.org/rfc/rfc6749#section-5.2 + // but some unorthodox servers respond 200 in error case + if failureStatus || retrieveError.ErrorCode != "" { + return nil, retrieveError + } + if token.AccessToken == "" { + return nil, errors.New("oauth2: server response missing access_token") + } + return token, nil +} + +// mirrors oauth2.RetrieveError +type RetrieveError struct { + Response *http.Response + Body []byte + ErrorCode string + ErrorDescription string + ErrorURI string +} + +func (r *RetrieveError) Error() string { + if r.ErrorCode != "" { + s := fmt.Sprintf("oauth2: %q", r.ErrorCode) + if r.ErrorDescription != "" { + s += fmt.Sprintf(" %q", r.ErrorDescription) + } + if r.ErrorURI != "" { + s += fmt.Sprintf(" %q", r.ErrorURI) + } + return s + } + return fmt.Sprintf("oauth2: cannot fetch token: %v\nResponse: %s", r.Response.Status, r.Body) +} diff --git a/vendor/golang.org/x/oauth2/internal/transport.go b/vendor/golang.org/x/oauth2/internal/transport.go new file mode 100644 index 000000000..b9db01ddf --- /dev/null +++ b/vendor/golang.org/x/oauth2/internal/transport.go @@ -0,0 +1,28 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package internal + +import ( + "context" + "net/http" +) + +// HTTPClient is the context key to use with golang.org/x/net/context's +// WithValue function to associate an *http.Client value with a context. +var HTTPClient ContextKey + +// ContextKey is just an empty struct. It exists so HTTPClient can be +// an immutable public variable with a unique type. It's immutable +// because nobody else can create a ContextKey, being unexported. +type ContextKey struct{} + +func ContextClient(ctx context.Context) *http.Client { + if ctx != nil { + if hc, ok := ctx.Value(HTTPClient).(*http.Client); ok { + return hc + } + } + return http.DefaultClient +} diff --git a/vendor/golang.org/x/oauth2/jws/jws.go b/vendor/golang.org/x/oauth2/jws/jws.go new file mode 100644 index 000000000..95015648b --- /dev/null +++ b/vendor/golang.org/x/oauth2/jws/jws.go @@ -0,0 +1,182 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package jws provides a partial implementation +// of JSON Web Signature encoding and decoding. +// It exists to support the golang.org/x/oauth2 package. +// +// See RFC 7515. +// +// Deprecated: this package is not intended for public use and might be +// removed in the future. It exists for internal use only. +// Please switch to another JWS package or copy this package into your own +// source tree. +package jws // import "golang.org/x/oauth2/jws" + +import ( + "bytes" + "crypto" + "crypto/rand" + "crypto/rsa" + "crypto/sha256" + "encoding/base64" + "encoding/json" + "errors" + "fmt" + "strings" + "time" +) + +// ClaimSet contains information about the JWT signature including the +// permissions being requested (scopes), the target of the token, the issuer, +// the time the token was issued, and the lifetime of the token. +type ClaimSet struct { + Iss string `json:"iss"` // email address of the client_id of the application making the access token request + Scope string `json:"scope,omitempty"` // space-delimited list of the permissions the application requests + Aud string `json:"aud"` // descriptor of the intended target of the assertion (Optional). + Exp int64 `json:"exp"` // the expiration time of the assertion (seconds since Unix epoch) + Iat int64 `json:"iat"` // the time the assertion was issued (seconds since Unix epoch) + Typ string `json:"typ,omitempty"` // token type (Optional). + + // Email for which the application is requesting delegated access (Optional). + Sub string `json:"sub,omitempty"` + + // The old name of Sub. Client keeps setting Prn to be + // complaint with legacy OAuth 2.0 providers. (Optional) + Prn string `json:"prn,omitempty"` + + // See http://tools.ietf.org/html/draft-jones-json-web-token-10#section-4.3 + // This array is marshalled using custom code (see (c *ClaimSet) encode()). + PrivateClaims map[string]interface{} `json:"-"` +} + +func (c *ClaimSet) encode() (string, error) { + // Reverting time back for machines whose time is not perfectly in sync. + // If client machine's time is in the future according + // to Google servers, an access token will not be issued. + now := time.Now().Add(-10 * time.Second) + if c.Iat == 0 { + c.Iat = now.Unix() + } + if c.Exp == 0 { + c.Exp = now.Add(time.Hour).Unix() + } + if c.Exp < c.Iat { + return "", fmt.Errorf("jws: invalid Exp = %v; must be later than Iat = %v", c.Exp, c.Iat) + } + + b, err := json.Marshal(c) + if err != nil { + return "", err + } + + if len(c.PrivateClaims) == 0 { + return base64.RawURLEncoding.EncodeToString(b), nil + } + + // Marshal private claim set and then append it to b. + prv, err := json.Marshal(c.PrivateClaims) + if err != nil { + return "", fmt.Errorf("jws: invalid map of private claims %v", c.PrivateClaims) + } + + // Concatenate public and private claim JSON objects. + if !bytes.HasSuffix(b, []byte{'}'}) { + return "", fmt.Errorf("jws: invalid JSON %s", b) + } + if !bytes.HasPrefix(prv, []byte{'{'}) { + return "", fmt.Errorf("jws: invalid JSON %s", prv) + } + b[len(b)-1] = ',' // Replace closing curly brace with a comma. + b = append(b, prv[1:]...) // Append private claims. + return base64.RawURLEncoding.EncodeToString(b), nil +} + +// Header represents the header for the signed JWS payloads. +type Header struct { + // The algorithm used for signature. + Algorithm string `json:"alg"` + + // Represents the token type. + Typ string `json:"typ"` + + // The optional hint of which key is being used. + KeyID string `json:"kid,omitempty"` +} + +func (h *Header) encode() (string, error) { + b, err := json.Marshal(h) + if err != nil { + return "", err + } + return base64.RawURLEncoding.EncodeToString(b), nil +} + +// Decode decodes a claim set from a JWS payload. +func Decode(payload string) (*ClaimSet, error) { + // decode returned id token to get expiry + s := strings.Split(payload, ".") + if len(s) < 2 { + // TODO(jbd): Provide more context about the error. + return nil, errors.New("jws: invalid token received") + } + decoded, err := base64.RawURLEncoding.DecodeString(s[1]) + if err != nil { + return nil, err + } + c := &ClaimSet{} + err = json.NewDecoder(bytes.NewBuffer(decoded)).Decode(c) + return c, err +} + +// Signer returns a signature for the given data. +type Signer func(data []byte) (sig []byte, err error) + +// EncodeWithSigner encodes a header and claim set with the provided signer. +func EncodeWithSigner(header *Header, c *ClaimSet, sg Signer) (string, error) { + head, err := header.encode() + if err != nil { + return "", err + } + cs, err := c.encode() + if err != nil { + return "", err + } + ss := fmt.Sprintf("%s.%s", head, cs) + sig, err := sg([]byte(ss)) + if err != nil { + return "", err + } + return fmt.Sprintf("%s.%s", ss, base64.RawURLEncoding.EncodeToString(sig)), nil +} + +// Encode encodes a signed JWS with provided header and claim set. +// This invokes EncodeWithSigner using crypto/rsa.SignPKCS1v15 with the given RSA private key. +func Encode(header *Header, c *ClaimSet, key *rsa.PrivateKey) (string, error) { + sg := func(data []byte) (sig []byte, err error) { + h := sha256.New() + h.Write(data) + return rsa.SignPKCS1v15(rand.Reader, key, crypto.SHA256, h.Sum(nil)) + } + return EncodeWithSigner(header, c, sg) +} + +// Verify tests whether the provided JWT token's signature was produced by the private key +// associated with the supplied public key. +func Verify(token string, key *rsa.PublicKey) error { + parts := strings.Split(token, ".") + if len(parts) != 3 { + return errors.New("jws: invalid token received, token must have 3 parts") + } + + signedContent := parts[0] + "." + parts[1] + signatureString, err := base64.RawURLEncoding.DecodeString(parts[2]) + if err != nil { + return err + } + + h := sha256.New() + h.Write([]byte(signedContent)) + return rsa.VerifyPKCS1v15(key, crypto.SHA256, h.Sum(nil), signatureString) +} diff --git a/vendor/golang.org/x/oauth2/jwt/jwt.go b/vendor/golang.org/x/oauth2/jwt/jwt.go new file mode 100644 index 000000000..b2bf18298 --- /dev/null +++ b/vendor/golang.org/x/oauth2/jwt/jwt.go @@ -0,0 +1,185 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package jwt implements the OAuth 2.0 JSON Web Token flow, commonly +// known as "two-legged OAuth 2.0". +// +// See: https://tools.ietf.org/html/draft-ietf-oauth-jwt-bearer-12 +package jwt + +import ( + "context" + "encoding/json" + "fmt" + "io" + "io/ioutil" + "net/http" + "net/url" + "strings" + "time" + + "golang.org/x/oauth2" + "golang.org/x/oauth2/internal" + "golang.org/x/oauth2/jws" +) + +var ( + defaultGrantType = "urn:ietf:params:oauth:grant-type:jwt-bearer" + defaultHeader = &jws.Header{Algorithm: "RS256", Typ: "JWT"} +) + +// Config is the configuration for using JWT to fetch tokens, +// commonly known as "two-legged OAuth 2.0". +type Config struct { + // Email is the OAuth client identifier used when communicating with + // the configured OAuth provider. + Email string + + // PrivateKey contains the contents of an RSA private key or the + // contents of a PEM file that contains a private key. The provided + // private key is used to sign JWT payloads. + // PEM containers with a passphrase are not supported. + // Use the following command to convert a PKCS 12 file into a PEM. + // + // $ openssl pkcs12 -in key.p12 -out key.pem -nodes + // + PrivateKey []byte + + // PrivateKeyID contains an optional hint indicating which key is being + // used. + PrivateKeyID string + + // Subject is the optional user to impersonate. + Subject string + + // Scopes optionally specifies a list of requested permission scopes. + Scopes []string + + // TokenURL is the endpoint required to complete the 2-legged JWT flow. + TokenURL string + + // Expires optionally specifies how long the token is valid for. + Expires time.Duration + + // Audience optionally specifies the intended audience of the + // request. If empty, the value of TokenURL is used as the + // intended audience. + Audience string + + // PrivateClaims optionally specifies custom private claims in the JWT. + // See http://tools.ietf.org/html/draft-jones-json-web-token-10#section-4.3 + PrivateClaims map[string]interface{} + + // UseIDToken optionally specifies whether ID token should be used instead + // of access token when the server returns both. + UseIDToken bool +} + +// TokenSource returns a JWT TokenSource using the configuration +// in c and the HTTP client from the provided context. +func (c *Config) TokenSource(ctx context.Context) oauth2.TokenSource { + return oauth2.ReuseTokenSource(nil, jwtSource{ctx, c}) +} + +// Client returns an HTTP client wrapping the context's +// HTTP transport and adding Authorization headers with tokens +// obtained from c. +// +// The returned client and its Transport should not be modified. +func (c *Config) Client(ctx context.Context) *http.Client { + return oauth2.NewClient(ctx, c.TokenSource(ctx)) +} + +// jwtSource is a source that always does a signed JWT request for a token. +// It should typically be wrapped with a reuseTokenSource. +type jwtSource struct { + ctx context.Context + conf *Config +} + +func (js jwtSource) Token() (*oauth2.Token, error) { + pk, err := internal.ParseKey(js.conf.PrivateKey) + if err != nil { + return nil, err + } + hc := oauth2.NewClient(js.ctx, nil) + claimSet := &jws.ClaimSet{ + Iss: js.conf.Email, + Scope: strings.Join(js.conf.Scopes, " "), + Aud: js.conf.TokenURL, + PrivateClaims: js.conf.PrivateClaims, + } + if subject := js.conf.Subject; subject != "" { + claimSet.Sub = subject + // prn is the old name of sub. Keep setting it + // to be compatible with legacy OAuth 2.0 providers. + claimSet.Prn = subject + } + if t := js.conf.Expires; t > 0 { + claimSet.Exp = time.Now().Add(t).Unix() + } + if aud := js.conf.Audience; aud != "" { + claimSet.Aud = aud + } + h := *defaultHeader + h.KeyID = js.conf.PrivateKeyID + payload, err := jws.Encode(&h, claimSet, pk) + if err != nil { + return nil, err + } + v := url.Values{} + v.Set("grant_type", defaultGrantType) + v.Set("assertion", payload) + resp, err := hc.PostForm(js.conf.TokenURL, v) + if err != nil { + return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err) + } + defer resp.Body.Close() + body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20)) + if err != nil { + return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err) + } + if c := resp.StatusCode; c < 200 || c > 299 { + return nil, &oauth2.RetrieveError{ + Response: resp, + Body: body, + } + } + // tokenRes is the JSON response body. + var tokenRes struct { + AccessToken string `json:"access_token"` + TokenType string `json:"token_type"` + IDToken string `json:"id_token"` + ExpiresIn int64 `json:"expires_in"` // relative seconds from now + } + if err := json.Unmarshal(body, &tokenRes); err != nil { + return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err) + } + token := &oauth2.Token{ + AccessToken: tokenRes.AccessToken, + TokenType: tokenRes.TokenType, + } + raw := make(map[string]interface{}) + json.Unmarshal(body, &raw) // no error checks for optional fields + token = token.WithExtra(raw) + + if secs := tokenRes.ExpiresIn; secs > 0 { + token.Expiry = time.Now().Add(time.Duration(secs) * time.Second) + } + if v := tokenRes.IDToken; v != "" { + // decode returned id token to get expiry + claimSet, err := jws.Decode(v) + if err != nil { + return nil, fmt.Errorf("oauth2: error decoding JWT token: %v", err) + } + token.Expiry = time.Unix(claimSet.Exp, 0) + } + if js.conf.UseIDToken { + if tokenRes.IDToken == "" { + return nil, fmt.Errorf("oauth2: response doesn't have JWT token") + } + token.AccessToken = tokenRes.IDToken + } + return token, nil +} diff --git a/vendor/golang.org/x/oauth2/oauth2.go b/vendor/golang.org/x/oauth2/oauth2.go new file mode 100644 index 000000000..09f6a49b8 --- /dev/null +++ b/vendor/golang.org/x/oauth2/oauth2.go @@ -0,0 +1,421 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package oauth2 provides support for making +// OAuth2 authorized and authenticated HTTP requests, +// as specified in RFC 6749. +// It can additionally grant authorization with Bearer JWT. +package oauth2 // import "golang.org/x/oauth2" + +import ( + "bytes" + "context" + "errors" + "net/http" + "net/url" + "strings" + "sync" + "time" + + "golang.org/x/oauth2/internal" +) + +// NoContext is the default context you should supply if not using +// your own context.Context (see https://golang.org/x/net/context). +// +// Deprecated: Use context.Background() or context.TODO() instead. +var NoContext = context.TODO() + +// RegisterBrokenAuthHeaderProvider previously did something. It is now a no-op. +// +// Deprecated: this function no longer does anything. Caller code that +// wants to avoid potential extra HTTP requests made during +// auto-probing of the provider's auth style should set +// Endpoint.AuthStyle. +func RegisterBrokenAuthHeaderProvider(tokenURL string) {} + +// Config describes a typical 3-legged OAuth2 flow, with both the +// client application information and the server's endpoint URLs. +// For the client credentials 2-legged OAuth2 flow, see the clientcredentials +// package (https://golang.org/x/oauth2/clientcredentials). +type Config struct { + // ClientID is the application's ID. + ClientID string + + // ClientSecret is the application's secret. + ClientSecret string + + // Endpoint contains the resource server's token endpoint + // URLs. These are constants specific to each server and are + // often available via site-specific packages, such as + // google.Endpoint or github.Endpoint. + Endpoint Endpoint + + // RedirectURL is the URL to redirect users going through + // the OAuth flow, after the resource owner's URLs. + RedirectURL string + + // Scope specifies optional requested permissions. + Scopes []string + + // authStyleCache caches which auth style to use when Endpoint.AuthStyle is + // the zero value (AuthStyleAutoDetect). + authStyleCache internal.LazyAuthStyleCache +} + +// A TokenSource is anything that can return a token. +type TokenSource interface { + // Token returns a token or an error. + // Token must be safe for concurrent use by multiple goroutines. + // The returned Token must not be modified. + Token() (*Token, error) +} + +// Endpoint represents an OAuth 2.0 provider's authorization and token +// endpoint URLs. +type Endpoint struct { + AuthURL string + DeviceAuthURL string + TokenURL string + + // AuthStyle optionally specifies how the endpoint wants the + // client ID & client secret sent. The zero value means to + // auto-detect. + AuthStyle AuthStyle +} + +// AuthStyle represents how requests for tokens are authenticated +// to the server. +type AuthStyle int + +const ( + // AuthStyleAutoDetect means to auto-detect which authentication + // style the provider wants by trying both ways and caching + // the successful way for the future. + AuthStyleAutoDetect AuthStyle = 0 + + // AuthStyleInParams sends the "client_id" and "client_secret" + // in the POST body as application/x-www-form-urlencoded parameters. + AuthStyleInParams AuthStyle = 1 + + // AuthStyleInHeader sends the client_id and client_password + // using HTTP Basic Authorization. This is an optional style + // described in the OAuth2 RFC 6749 section 2.3.1. + AuthStyleInHeader AuthStyle = 2 +) + +var ( + // AccessTypeOnline and AccessTypeOffline are options passed + // to the Options.AuthCodeURL method. They modify the + // "access_type" field that gets sent in the URL returned by + // AuthCodeURL. + // + // Online is the default if neither is specified. If your + // application needs to refresh access tokens when the user + // is not present at the browser, then use offline. This will + // result in your application obtaining a refresh token the + // first time your application exchanges an authorization + // code for a user. + AccessTypeOnline AuthCodeOption = SetAuthURLParam("access_type", "online") + AccessTypeOffline AuthCodeOption = SetAuthURLParam("access_type", "offline") + + // ApprovalForce forces the users to view the consent dialog + // and confirm the permissions request at the URL returned + // from AuthCodeURL, even if they've already done so. + ApprovalForce AuthCodeOption = SetAuthURLParam("prompt", "consent") +) + +// An AuthCodeOption is passed to Config.AuthCodeURL. +type AuthCodeOption interface { + setValue(url.Values) +} + +type setParam struct{ k, v string } + +func (p setParam) setValue(m url.Values) { m.Set(p.k, p.v) } + +// SetAuthURLParam builds an AuthCodeOption which passes key/value parameters +// to a provider's authorization endpoint. +func SetAuthURLParam(key, value string) AuthCodeOption { + return setParam{key, value} +} + +// AuthCodeURL returns a URL to OAuth 2.0 provider's consent page +// that asks for permissions for the required scopes explicitly. +// +// State is an opaque value used by the client to maintain state between the +// request and callback. The authorization server includes this value when +// redirecting the user agent back to the client. +// +// Opts may include AccessTypeOnline or AccessTypeOffline, as well +// as ApprovalForce. +// +// To protect against CSRF attacks, opts should include a PKCE challenge +// (S256ChallengeOption). Not all servers support PKCE. An alternative is to +// generate a random state parameter and verify it after exchange. +// See https://datatracker.ietf.org/doc/html/rfc6749#section-10.12 (predating +// PKCE), https://www.oauth.com/oauth2-servers/pkce/ and +// https://www.ietf.org/archive/id/draft-ietf-oauth-v2-1-09.html#name-cross-site-request-forgery (describing both approaches) +func (c *Config) AuthCodeURL(state string, opts ...AuthCodeOption) string { + var buf bytes.Buffer + buf.WriteString(c.Endpoint.AuthURL) + v := url.Values{ + "response_type": {"code"}, + "client_id": {c.ClientID}, + } + if c.RedirectURL != "" { + v.Set("redirect_uri", c.RedirectURL) + } + if len(c.Scopes) > 0 { + v.Set("scope", strings.Join(c.Scopes, " ")) + } + if state != "" { + v.Set("state", state) + } + for _, opt := range opts { + opt.setValue(v) + } + if strings.Contains(c.Endpoint.AuthURL, "?") { + buf.WriteByte('&') + } else { + buf.WriteByte('?') + } + buf.WriteString(v.Encode()) + return buf.String() +} + +// PasswordCredentialsToken converts a resource owner username and password +// pair into a token. +// +// Per the RFC, this grant type should only be used "when there is a high +// degree of trust between the resource owner and the client (e.g., the client +// is part of the device operating system or a highly privileged application), +// and when other authorization grant types are not available." +// See https://tools.ietf.org/html/rfc6749#section-4.3 for more info. +// +// The provided context optionally controls which HTTP client is used. See the HTTPClient variable. +func (c *Config) PasswordCredentialsToken(ctx context.Context, username, password string) (*Token, error) { + v := url.Values{ + "grant_type": {"password"}, + "username": {username}, + "password": {password}, + } + if len(c.Scopes) > 0 { + v.Set("scope", strings.Join(c.Scopes, " ")) + } + return retrieveToken(ctx, c, v) +} + +// Exchange converts an authorization code into a token. +// +// It is used after a resource provider redirects the user back +// to the Redirect URI (the URL obtained from AuthCodeURL). +// +// The provided context optionally controls which HTTP client is used. See the HTTPClient variable. +// +// The code will be in the *http.Request.FormValue("code"). Before +// calling Exchange, be sure to validate FormValue("state") if you are +// using it to protect against CSRF attacks. +// +// If using PKCE to protect against CSRF attacks, opts should include a +// VerifierOption. +func (c *Config) Exchange(ctx context.Context, code string, opts ...AuthCodeOption) (*Token, error) { + v := url.Values{ + "grant_type": {"authorization_code"}, + "code": {code}, + } + if c.RedirectURL != "" { + v.Set("redirect_uri", c.RedirectURL) + } + for _, opt := range opts { + opt.setValue(v) + } + return retrieveToken(ctx, c, v) +} + +// Client returns an HTTP client using the provided token. +// The token will auto-refresh as necessary. The underlying +// HTTP transport will be obtained using the provided context. +// The returned client and its Transport should not be modified. +func (c *Config) Client(ctx context.Context, t *Token) *http.Client { + return NewClient(ctx, c.TokenSource(ctx, t)) +} + +// TokenSource returns a TokenSource that returns t until t expires, +// automatically refreshing it as necessary using the provided context. +// +// Most users will use Config.Client instead. +func (c *Config) TokenSource(ctx context.Context, t *Token) TokenSource { + tkr := &tokenRefresher{ + ctx: ctx, + conf: c, + } + if t != nil { + tkr.refreshToken = t.RefreshToken + } + return &reuseTokenSource{ + t: t, + new: tkr, + } +} + +// tokenRefresher is a TokenSource that makes "grant_type"=="refresh_token" +// HTTP requests to renew a token using a RefreshToken. +type tokenRefresher struct { + ctx context.Context // used to get HTTP requests + conf *Config + refreshToken string +} + +// WARNING: Token is not safe for concurrent access, as it +// updates the tokenRefresher's refreshToken field. +// Within this package, it is used by reuseTokenSource which +// synchronizes calls to this method with its own mutex. +func (tf *tokenRefresher) Token() (*Token, error) { + if tf.refreshToken == "" { + return nil, errors.New("oauth2: token expired and refresh token is not set") + } + + tk, err := retrieveToken(tf.ctx, tf.conf, url.Values{ + "grant_type": {"refresh_token"}, + "refresh_token": {tf.refreshToken}, + }) + + if err != nil { + return nil, err + } + if tf.refreshToken != tk.RefreshToken { + tf.refreshToken = tk.RefreshToken + } + return tk, err +} + +// reuseTokenSource is a TokenSource that holds a single token in memory +// and validates its expiry before each call to retrieve it with +// Token. If it's expired, it will be auto-refreshed using the +// new TokenSource. +type reuseTokenSource struct { + new TokenSource // called when t is expired. + + mu sync.Mutex // guards t + t *Token + + expiryDelta time.Duration +} + +// Token returns the current token if it's still valid, else will +// refresh the current token (using r.Context for HTTP client +// information) and return the new one. +func (s *reuseTokenSource) Token() (*Token, error) { + s.mu.Lock() + defer s.mu.Unlock() + if s.t.Valid() { + return s.t, nil + } + t, err := s.new.Token() + if err != nil { + return nil, err + } + t.expiryDelta = s.expiryDelta + s.t = t + return t, nil +} + +// StaticTokenSource returns a TokenSource that always returns the same token. +// Because the provided token t is never refreshed, StaticTokenSource is only +// useful for tokens that never expire. +func StaticTokenSource(t *Token) TokenSource { + return staticTokenSource{t} +} + +// staticTokenSource is a TokenSource that always returns the same Token. +type staticTokenSource struct { + t *Token +} + +func (s staticTokenSource) Token() (*Token, error) { + return s.t, nil +} + +// HTTPClient is the context key to use with golang.org/x/net/context's +// WithValue function to associate an *http.Client value with a context. +var HTTPClient internal.ContextKey + +// NewClient creates an *http.Client from a Context and TokenSource. +// The returned client is not valid beyond the lifetime of the context. +// +// Note that if a custom *http.Client is provided via the Context it +// is used only for token acquisition and is not used to configure the +// *http.Client returned from NewClient. +// +// As a special case, if src is nil, a non-OAuth2 client is returned +// using the provided context. This exists to support related OAuth2 +// packages. +func NewClient(ctx context.Context, src TokenSource) *http.Client { + if src == nil { + return internal.ContextClient(ctx) + } + return &http.Client{ + Transport: &Transport{ + Base: internal.ContextClient(ctx).Transport, + Source: ReuseTokenSource(nil, src), + }, + } +} + +// ReuseTokenSource returns a TokenSource which repeatedly returns the +// same token as long as it's valid, starting with t. +// When its cached token is invalid, a new token is obtained from src. +// +// ReuseTokenSource is typically used to reuse tokens from a cache +// (such as a file on disk) between runs of a program, rather than +// obtaining new tokens unnecessarily. +// +// The initial token t may be nil, in which case the TokenSource is +// wrapped in a caching version if it isn't one already. This also +// means it's always safe to wrap ReuseTokenSource around any other +// TokenSource without adverse effects. +func ReuseTokenSource(t *Token, src TokenSource) TokenSource { + // Don't wrap a reuseTokenSource in itself. That would work, + // but cause an unnecessary number of mutex operations. + // Just build the equivalent one. + if rt, ok := src.(*reuseTokenSource); ok { + if t == nil { + // Just use it directly. + return rt + } + src = rt.new + } + return &reuseTokenSource{ + t: t, + new: src, + } +} + +// ReuseTokenSourceWithExpiry returns a TokenSource that acts in the same manner as the +// TokenSource returned by ReuseTokenSource, except the expiry buffer is +// configurable. The expiration time of a token is calculated as +// t.Expiry.Add(-earlyExpiry). +func ReuseTokenSourceWithExpiry(t *Token, src TokenSource, earlyExpiry time.Duration) TokenSource { + // Don't wrap a reuseTokenSource in itself. That would work, + // but cause an unnecessary number of mutex operations. + // Just build the equivalent one. + if rt, ok := src.(*reuseTokenSource); ok { + if t == nil { + // Just use it directly, but set the expiryDelta to earlyExpiry, + // so the behavior matches what the user expects. + rt.expiryDelta = earlyExpiry + return rt + } + src = rt.new + } + if t != nil { + t.expiryDelta = earlyExpiry + } + return &reuseTokenSource{ + t: t, + new: src, + expiryDelta: earlyExpiry, + } +} diff --git a/vendor/golang.org/x/oauth2/pkce.go b/vendor/golang.org/x/oauth2/pkce.go new file mode 100644 index 000000000..50593b6df --- /dev/null +++ b/vendor/golang.org/x/oauth2/pkce.go @@ -0,0 +1,68 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +package oauth2 + +import ( + "crypto/rand" + "crypto/sha256" + "encoding/base64" + "net/url" +) + +const ( + codeChallengeKey = "code_challenge" + codeChallengeMethodKey = "code_challenge_method" + codeVerifierKey = "code_verifier" +) + +// GenerateVerifier generates a PKCE code verifier with 32 octets of randomness. +// This follows recommendations in RFC 7636. +// +// A fresh verifier should be generated for each authorization. +// S256ChallengeOption(verifier) should then be passed to Config.AuthCodeURL +// (or Config.DeviceAccess) and VerifierOption(verifier) to Config.Exchange +// (or Config.DeviceAccessToken). +func GenerateVerifier() string { + // "RECOMMENDED that the output of a suitable random number generator be + // used to create a 32-octet sequence. The octet sequence is then + // base64url-encoded to produce a 43-octet URL-safe string to use as the + // code verifier." + // https://datatracker.ietf.org/doc/html/rfc7636#section-4.1 + data := make([]byte, 32) + if _, err := rand.Read(data); err != nil { + panic(err) + } + return base64.RawURLEncoding.EncodeToString(data) +} + +// VerifierOption returns a PKCE code verifier AuthCodeOption. It should be +// passed to Config.Exchange or Config.DeviceAccessToken only. +func VerifierOption(verifier string) AuthCodeOption { + return setParam{k: codeVerifierKey, v: verifier} +} + +// S256ChallengeFromVerifier returns a PKCE code challenge derived from verifier with method S256. +// +// Prefer to use S256ChallengeOption where possible. +func S256ChallengeFromVerifier(verifier string) string { + sha := sha256.Sum256([]byte(verifier)) + return base64.RawURLEncoding.EncodeToString(sha[:]) +} + +// S256ChallengeOption derives a PKCE code challenge derived from verifier with +// method S256. It should be passed to Config.AuthCodeURL or Config.DeviceAccess +// only. +func S256ChallengeOption(verifier string) AuthCodeOption { + return challengeOption{ + challenge_method: "S256", + challenge: S256ChallengeFromVerifier(verifier), + } +} + +type challengeOption struct{ challenge_method, challenge string } + +func (p challengeOption) setValue(m url.Values) { + m.Set(codeChallengeMethodKey, p.challenge_method) + m.Set(codeChallengeKey, p.challenge) +} diff --git a/vendor/golang.org/x/oauth2/token.go b/vendor/golang.org/x/oauth2/token.go new file mode 100644 index 000000000..109997d77 --- /dev/null +++ b/vendor/golang.org/x/oauth2/token.go @@ -0,0 +1,212 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oauth2 + +import ( + "context" + "fmt" + "net/http" + "net/url" + "strconv" + "strings" + "time" + + "golang.org/x/oauth2/internal" +) + +// defaultExpiryDelta determines how earlier a token should be considered +// expired than its actual expiration time. It is used to avoid late +// expirations due to client-server time mismatches. +const defaultExpiryDelta = 10 * time.Second + +// Token represents the credentials used to authorize +// the requests to access protected resources on the OAuth 2.0 +// provider's backend. +// +// Most users of this package should not access fields of Token +// directly. They're exported mostly for use by related packages +// implementing derivative OAuth2 flows. +type Token struct { + // AccessToken is the token that authorizes and authenticates + // the requests. + AccessToken string `json:"access_token"` + + // TokenType is the type of token. + // The Type method returns either this or "Bearer", the default. + TokenType string `json:"token_type,omitempty"` + + // RefreshToken is a token that's used by the application + // (as opposed to the user) to refresh the access token + // if it expires. + RefreshToken string `json:"refresh_token,omitempty"` + + // Expiry is the optional expiration time of the access token. + // + // If zero, TokenSource implementations will reuse the same + // token forever and RefreshToken or equivalent + // mechanisms for that TokenSource will not be used. + Expiry time.Time `json:"expiry,omitempty"` + + // ExpiresIn is the OAuth2 wire format "expires_in" field, + // which specifies how many seconds later the token expires, + // relative to an unknown time base approximately around "now". + // It is the application's responsibility to populate + // `Expiry` from `ExpiresIn` when required. + ExpiresIn int64 `json:"expires_in,omitempty"` + + // raw optionally contains extra metadata from the server + // when updating a token. + raw interface{} + + // expiryDelta is used to calculate when a token is considered + // expired, by subtracting from Expiry. If zero, defaultExpiryDelta + // is used. + expiryDelta time.Duration +} + +// Type returns t.TokenType if non-empty, else "Bearer". +func (t *Token) Type() string { + if strings.EqualFold(t.TokenType, "bearer") { + return "Bearer" + } + if strings.EqualFold(t.TokenType, "mac") { + return "MAC" + } + if strings.EqualFold(t.TokenType, "basic") { + return "Basic" + } + if t.TokenType != "" { + return t.TokenType + } + return "Bearer" +} + +// SetAuthHeader sets the Authorization header to r using the access +// token in t. +// +// This method is unnecessary when using Transport or an HTTP Client +// returned by this package. +func (t *Token) SetAuthHeader(r *http.Request) { + r.Header.Set("Authorization", t.Type()+" "+t.AccessToken) +} + +// WithExtra returns a new Token that's a clone of t, but using the +// provided raw extra map. This is only intended for use by packages +// implementing derivative OAuth2 flows. +func (t *Token) WithExtra(extra interface{}) *Token { + t2 := new(Token) + *t2 = *t + t2.raw = extra + return t2 +} + +// Extra returns an extra field. +// Extra fields are key-value pairs returned by the server as a +// part of the token retrieval response. +func (t *Token) Extra(key string) interface{} { + if raw, ok := t.raw.(map[string]interface{}); ok { + return raw[key] + } + + vals, ok := t.raw.(url.Values) + if !ok { + return nil + } + + v := vals.Get(key) + switch s := strings.TrimSpace(v); strings.Count(s, ".") { + case 0: // Contains no "."; try to parse as int + if i, err := strconv.ParseInt(s, 10, 64); err == nil { + return i + } + case 1: // Contains a single "."; try to parse as float + if f, err := strconv.ParseFloat(s, 64); err == nil { + return f + } + } + + return v +} + +// timeNow is time.Now but pulled out as a variable for tests. +var timeNow = time.Now + +// expired reports whether the token is expired. +// t must be non-nil. +func (t *Token) expired() bool { + if t.Expiry.IsZero() { + return false + } + + expiryDelta := defaultExpiryDelta + if t.expiryDelta != 0 { + expiryDelta = t.expiryDelta + } + return t.Expiry.Round(0).Add(-expiryDelta).Before(timeNow()) +} + +// Valid reports whether t is non-nil, has an AccessToken, and is not expired. +func (t *Token) Valid() bool { + return t != nil && t.AccessToken != "" && !t.expired() +} + +// tokenFromInternal maps an *internal.Token struct into +// a *Token struct. +func tokenFromInternal(t *internal.Token) *Token { + if t == nil { + return nil + } + return &Token{ + AccessToken: t.AccessToken, + TokenType: t.TokenType, + RefreshToken: t.RefreshToken, + Expiry: t.Expiry, + raw: t.Raw, + } +} + +// retrieveToken takes a *Config and uses that to retrieve an *internal.Token. +// This token is then mapped from *internal.Token into an *oauth2.Token which is returned along +// with an error.. +func retrieveToken(ctx context.Context, c *Config, v url.Values) (*Token, error) { + tk, err := internal.RetrieveToken(ctx, c.ClientID, c.ClientSecret, c.Endpoint.TokenURL, v, internal.AuthStyle(c.Endpoint.AuthStyle), c.authStyleCache.Get()) + if err != nil { + if rErr, ok := err.(*internal.RetrieveError); ok { + return nil, (*RetrieveError)(rErr) + } + return nil, err + } + return tokenFromInternal(tk), nil +} + +// RetrieveError is the error returned when the token endpoint returns a +// non-2XX HTTP status code or populates RFC 6749's 'error' parameter. +// https://datatracker.ietf.org/doc/html/rfc6749#section-5.2 +type RetrieveError struct { + Response *http.Response + // Body is the body that was consumed by reading Response.Body. + // It may be truncated. + Body []byte + // ErrorCode is RFC 6749's 'error' parameter. + ErrorCode string + // ErrorDescription is RFC 6749's 'error_description' parameter. + ErrorDescription string + // ErrorURI is RFC 6749's 'error_uri' parameter. + ErrorURI string +} + +func (r *RetrieveError) Error() string { + if r.ErrorCode != "" { + s := fmt.Sprintf("oauth2: %q", r.ErrorCode) + if r.ErrorDescription != "" { + s += fmt.Sprintf(" %q", r.ErrorDescription) + } + if r.ErrorURI != "" { + s += fmt.Sprintf(" %q", r.ErrorURI) + } + return s + } + return fmt.Sprintf("oauth2: cannot fetch token: %v\nResponse: %s", r.Response.Status, r.Body) +} diff --git a/vendor/golang.org/x/oauth2/transport.go b/vendor/golang.org/x/oauth2/transport.go new file mode 100644 index 000000000..90657915f --- /dev/null +++ b/vendor/golang.org/x/oauth2/transport.go @@ -0,0 +1,89 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oauth2 + +import ( + "errors" + "log" + "net/http" + "sync" +) + +// Transport is an http.RoundTripper that makes OAuth 2.0 HTTP requests, +// wrapping a base RoundTripper and adding an Authorization header +// with a token from the supplied Sources. +// +// Transport is a low-level mechanism. Most code will use the +// higher-level Config.Client method instead. +type Transport struct { + // Source supplies the token to add to outgoing requests' + // Authorization headers. + Source TokenSource + + // Base is the base RoundTripper used to make HTTP requests. + // If nil, http.DefaultTransport is used. + Base http.RoundTripper +} + +// RoundTrip authorizes and authenticates the request with an +// access token from Transport's Source. +func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) { + reqBodyClosed := false + if req.Body != nil { + defer func() { + if !reqBodyClosed { + req.Body.Close() + } + }() + } + + if t.Source == nil { + return nil, errors.New("oauth2: Transport's Source is nil") + } + token, err := t.Source.Token() + if err != nil { + return nil, err + } + + req2 := cloneRequest(req) // per RoundTripper contract + token.SetAuthHeader(req2) + + // req.Body is assumed to be closed by the base RoundTripper. + reqBodyClosed = true + return t.base().RoundTrip(req2) +} + +var cancelOnce sync.Once + +// CancelRequest does nothing. It used to be a legacy cancellation mechanism +// but now only it only logs on first use to warn that it's deprecated. +// +// Deprecated: use contexts for cancellation instead. +func (t *Transport) CancelRequest(req *http.Request) { + cancelOnce.Do(func() { + log.Printf("deprecated: golang.org/x/oauth2: Transport.CancelRequest no longer does anything; use contexts") + }) +} + +func (t *Transport) base() http.RoundTripper { + if t.Base != nil { + return t.Base + } + return http.DefaultTransport +} + +// cloneRequest returns a clone of the provided *http.Request. +// The clone is a shallow copy of the struct and its Header map. +func cloneRequest(r *http.Request) *http.Request { + // shallow copy of the struct + r2 := new(http.Request) + *r2 = *r + // deep copy of the Header + r2.Header = make(http.Header, len(r.Header)) + for k, s := range r.Header { + r2.Header[k] = append([]string(nil), s...) + } + return r2 +} diff --git a/vendor/modules.txt b/vendor/modules.txt index 05eb64e85..c1d79bbf1 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -1,3 +1,6 @@ +# cloud.google.com/go/compute/metadata v0.3.0 +## explicit; go 1.19 +cloud.google.com/go/compute/metadata # github.com/Azure/azure-sdk-for-go/sdk/azcore v1.10.0 ## explicit; go 1.18 github.com/Azure/azure-sdk-for-go/sdk/azcore @@ -341,6 +344,18 @@ golang.org/x/net/http/httpguts golang.org/x/net/http2 golang.org/x/net/http2/hpack golang.org/x/net/idna +# golang.org/x/oauth2 v0.23.0 +## explicit; go 1.18 +golang.org/x/oauth2 +golang.org/x/oauth2/authhandler +golang.org/x/oauth2/google +golang.org/x/oauth2/google/externalaccount +golang.org/x/oauth2/google/internal/externalaccountauthorizeduser +golang.org/x/oauth2/google/internal/impersonate +golang.org/x/oauth2/google/internal/stsexchange +golang.org/x/oauth2/internal +golang.org/x/oauth2/jws +golang.org/x/oauth2/jwt # golang.org/x/sync v0.7.0 ## explicit; go 1.18 golang.org/x/sync/errgroup