.semgrep.yml

rules:
  - id: rfc-5737-ip-address
    languages:
      - go
    message: Where a real IPv4 address isn't needed, use IPv4 addresses from RFC5737.
    paths:
      include:
        - '*.go'
    patterns:
      - pattern-regex: '(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)'
      - pattern-not-regex: '10\.\d+\.\d+.\d+'
      - pattern-not-regex: '192\.168\.\d+.\d+'
      - pattern-not-regex: '192\.0\.2\.\d+'    # 192.0.2.0/24 (TEST-NET-1, rfc5737)
      - pattern-not-regex: '198\.51\.100\.\d+' # 198.51.100.0/24 (TEST-NET-2, rfc5737)
      - pattern-not-regex: '203\.0\.113\.\d+'  # 203.0.113.0/24 (TEST-NET-3, rfc5737)
    severity: WARNING
  - id: rfc-3849-ip-address
    languages:
      - generic
    message: Where a real IPv6 address isn't needed, use IPv6 addresses from RFC3849.
    paths:
      include:
        - '*.go'
    patterns:
      - pattern-regex: '(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))'
    severity: WARNING

  - id: calling-errors-wrap
    languages: [go]
    message: 'Do not call `errors.Wrap`. Use `fmt.Errorf(".. : %w", err)` instead.'
    patterns:
      - pattern-either:
        - pattern: |
            errors.Wrap(...)
    severity: WARNING
  - id: no-use-of-stdlib-json
    languages:
      - go
    message: Favour "github.com/goccy/go-json" instead of "encoding/json" to allow better customisation of marshaling and unmarshaling JSON attributes. See https://github.com/cloudflare/cloudflare-go/pull/1360 for full details.
    paths:
      include:
        - '*.go'
    patterns:
      - pattern-regex: '\"encoding\/json\"'
    fix-regex:
      regex: \".*\"
      replacement: '"github.com/goccy/go-json"'
    severity: WARNING