diff --git a/Cargo.lock b/Cargo.lock index d0cae49..6262b32 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -2,6 +2,21 @@ # It is not intended for manual editing. version = 3 +[[package]] +name = "addr2line" +version = "0.21.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb" +dependencies = [ + "gimli", +] + +[[package]] +name = "adler" +version = "1.0.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe" + [[package]] name = "aead" version = "0.5.2" @@ -32,11 +47,78 @@ dependencies = [ "memchr", ] +[[package]] +name = "async-compression" +version = "0.4.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a116f46a969224200a0a97f29cfd4c50e7534e4b4826bd23ea2c3c533039c82c" +dependencies = [ + "flate2", + "futures-core", + "memchr", + "pin-project-lite", + "tokio", +] + +[[package]] +name = "autocfg" +version = "1.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa" + +[[package]] +name = "aws-lc-rs" +version = "1.8.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a8a47f2fb521b70c11ce7369a6c5fa4bd6af7e5d62ec06303875bafe7c6ba245" +dependencies = [ + "aws-lc-sys", + "mirai-annotations", + "paste", + "zeroize", +] + +[[package]] +name = "aws-lc-sys" +version = "0.19.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "2927c7af777b460b7ccd95f8b67acd7b4c04ec8896bf0c8e80ba30523cffc057" +dependencies = [ + "bindgen", + "cc", + "cmake", + "dunce", + "fs_extra", + "libc", + "paste", +] + +[[package]] +name = "backtrace" +version = "0.3.69" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "2089b7e3f35b9dd2d0ed921ead4f6d318c27680d4a5bd167b3ee120edb105837" +dependencies = [ + "addr2line", + "cc", + "cfg-if", + "libc", + "miniz_oxide", + "object", + "rustc-demangle", +] + +[[package]] +name = "base16ct" +version = "0.2.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "4c7f02d4ea65f2c1853089ffd8d2787bdbc63de2f0d29dedbcf8ccdfa0ccd4cf" + [[package]] name = "base64" -version = "0.21.2" +version = "0.22.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "604178f6c5c21f02dc555784810edfb88d34ac2c73b2eae109655649ee73ce3d" +checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6" [[package]] name = "base64ct" @@ -64,6 +146,35 @@ dependencies = [ "serde", ] +[[package]] +name = "bindgen" +version = "0.69.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a00dc851838a2120612785d195287475a3ac45514741da670b735818822129a0" +dependencies = [ + "bitflags 2.6.0", + "cexpr", + "clang-sys", + "itertools 0.12.1", + "lazy_static", + "lazycell", + "log", + "prettyplease", + "proc-macro2", + "quote", + "regex", + "rustc-hash", + "shlex", + "syn 2.0.43", + "which", +] + +[[package]] +name = "bit-vec" +version = "0.7.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d2c54ff287cfc0a34f38a6b832ea1bd8e448a330b3e40a50859e6488bee07f22" + [[package]] name = "bitflags" version = "1.3.2" @@ -72,9 +183,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a" [[package]] name = "bitflags" -version = "2.3.2" +version = "2.6.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "6dbe3c979c178231552ecba20214a8272df4e09f232a87aef4320cf06539aded" +checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de" [[package]] name = "blake2" @@ -113,12 +224,49 @@ dependencies = [ "cipher", ] +[[package]] +name = "bstr" +version = "1.9.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c48f0051a4b4c5e0b6d365cd04af53aeaa209e3cc15ec2cdb69e73cc87fbd0dc" +dependencies = [ + "memchr", + "serde", +] + [[package]] name = "byteorder" version = "1.4.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610" +[[package]] +name = "bytes" +version = "1.5.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a2bd12c1caf447e69cd4528f47f94d203fd2582878ecb9e9465484c4148a8223" + +[[package]] +name = "bzip2" +version = "0.4.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "bdb116a6ef3f6c3698828873ad02c3014b3c85cadb88496095628e3ef1e347f8" +dependencies = [ + "bzip2-sys", + "libc", +] + +[[package]] +name = "bzip2-sys" +version = "0.1.11+1.0.8" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "736a955f3fa7875102d57c82b8cac37ec45224a07fd32d58f9f7a186b6cd4cdc" +dependencies = [ + "cc", + "libc", + "pkg-config", +] + [[package]] name = "cbc" version = "0.1.2" @@ -130,9 +278,22 @@ dependencies = [ [[package]] name = "cc" -version = "1.0.73" +version = "1.0.83" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0" +dependencies = [ + "jobserver", + "libc", +] + +[[package]] +name = "cexpr" +version = "0.6.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11" +checksum = "6fac387a98bb7c37292057cffc56d62ecb629900026402633ae9160df93a8766" +dependencies = [ + "nom", +] [[package]] name = "cfg-if" @@ -175,13 +336,24 @@ dependencies = [ "zeroize", ] +[[package]] +name = "clang-sys" +version = "1.8.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0b023947811758c97c59bf9d1c188fd619ad4718dcaa767947df1cadb14f39f4" +dependencies = [ + "glob", + "libc", + "libloading", +] + [[package]] name = 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"b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d" +dependencies = [ + "cfg-if", +] + +[[package]] +name = "crossbeam-channel" +version = "0.5.11" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "176dc175b78f56c0f321911d9c8eb2b77a78a4860b9c19db83835fea1a46649b" +dependencies = [ + "crossbeam-utils", +] + +[[package]] +name = "crossbeam-utils" +version = "0.8.19" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "248e3bacc7dc6baa3b21e405ee045c3047101a49145e7e9eca583ab4c2ca5345" + [[package]] name = "crypt4gh" version = "0.4.1" @@ -229,6 +440,7 @@ dependencies = [ "base64", "bcrypt-pbkdf", "bincode", + "bytes", "cbc", "chacha20poly1305", "clap", @@ -236,18 +448,40 @@ dependencies = [ "ctr", "curve25519-dalek", "ed25519_to_curve25519", - "itertools", + "futures", + "futures-util", + "itertools 0.13.0", "lazy_static", "log", + "noodles", + "noodles-bam", + "noodles-sam", + "pin-project-lite", "pretty_env_logger", "rand", "rand_chacha", "regex", "rpassword", + "rustls", "scrypt", "serde", + "ssh-key", "testresult", "thiserror", + "tokio", + "tokio-util", +] + +[[package]] +name = "crypto-bigint" +version = "0.5.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0dc92fb57ca44df6db8059111ab3af99a63d5d0f8375d9972e319a379c6bab76" +dependencies = [ + "generic-array", + "rand_core", + "subtle", + "zeroize", ] [[package]] @@ -290,6 +524,7 @@ dependencies = [ "cfg-if", "cpufeatures", "curve25519-dalek-derive", + "digest", "fiat-crypto", "platforms", "rustc_version", @@ -305,7 +540,17 @@ checksum = "83fdaf97f4804dcebfa5862639bc9ce4121e82140bec2a987ac5140294865b5b" dependencies = [ "proc-macro2", "quote", - "syn 2.0.18", + "syn 2.0.43", +] + +[[package]] +name = "der" +version = "0.7.8" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "fffa369a668c8af7dbf8b5e56c9f744fbd399949ed171606040001947de40b1c" +dependencies = [ + "const-oid", + "zeroize", ] [[package]] @@ -315,10 +560,52 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292" dependencies = [ "block-buffer", + "const-oid", "crypto-common", "subtle", ] +[[package]] +name = "dunce" +version = "1.0.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "56ce8c6da7551ec6c462cbaf3bfbc75131ebbfa1c944aeaa9dab51ca1c5f0c3b" + +[[package]] +name = "ecdsa" +version = "0.16.9" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ee27f32b5c5292967d2d4a9d7f1e0b0aed2c15daded5a60300e4abb9d8020bca" +dependencies = [ + "der", + "digest", + "elliptic-curve", + "rfc6979", + "signature", + "spki", +] + +[[package]] +name = "ed25519" +version = "2.2.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "115531babc129696a58c64a4fef0a8bf9e9698629fb97e9e40767d235cfbcd53" +dependencies = [ + "signature", +] + +[[package]] +name = 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[[package]] name = "generic-array" version = "0.14.7" @@ -379,19 +795,49 @@ checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a" dependencies = [ "typenum", "version_check", + "zeroize", ] [[package]] name = "getrandom" -version = "0.2.6" +version = "0.2.12" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9be70c98951c83b8d2f8f60d7065fa6d5146873094452a1008da8c2f1e4205ad" +checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5" dependencies = [ "cfg-if", "libc", "wasi", ] +[[package]] +name = "gimli" +version = "0.28.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253" + +[[package]] +name = "glob" +version = "0.3.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b" + +[[package]] +name = "group" +version = "0.13.0" +source = 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"registry+https://github.com/rust-lang/crates.io-index" -checksum = "2a0956f1ba7c7909bfb66c2e9e4124ab6f6482560f6628b5aaeba39207c9aad9" +checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d" +dependencies = [ + "zeroize_derive", +] + +[[package]] +name = "zeroize_derive" +version = "1.4.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69" +dependencies = [ + "proc-macro2", + "quote", + "syn 2.0.43", +] diff --git a/Cargo.toml b/Cargo.toml index d897b48..d26b949 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -1,7 +1,7 @@ [package] name = "crypt4gh" version = "0.4.1" -authors = ["Roberto "] +authors = ["Roberto ", "Marko Malenic ", "Roman Valls Guimera "] edition = "2021" license = "Apache-2.0" description = "Encryption and decryption implementation of the Crypt4GH encryption format." @@ -23,10 +23,10 @@ path = "src/bin.rs" clap = { version = "4", features = ["derive", "env"] } regex = "1.5" rpassword = "7" -base64 = "0.21" +base64 = "0.22" lazy_static = "1.4" chacha20poly1305 = "0.10" -crypto_kx = { version = "0.2.1" } +crypto_kx = { version = "0.2" } scrypt = { version = "0.11" } bcrypt-pbkdf = { version = "0.10" } aes = { version = "0.8" } @@ -38,15 +38,26 @@ serde = { version = "1", features = ["derive"] } log = "0.4" pretty_env_logger = "0.5" thiserror = "1" -itertools = "0.11" +itertools = "0.13" rand = "0.8" rand_chacha = "0.3" ed25519_to_curve25519 = "0.2" -curve25519-dalek = "4.0.0" +curve25519-dalek = "4" +ssh-key = { version = "0.6.4", features = ["ed25519"] } +bytes = "1.5.0" +rustls = "0.23" +tokio = { version = "1", features = [ "io-util", "test-util", "macros", "rt-multi-thread" ] } +futures = "0.3" +pin-project-lite = "0.2.13" +tokio-util = { version = "0.7", features = ["codec"] } +futures-util = "0.3.30" [dev-dependencies] -testresult = "0.3" +testresult = "0.4" +noodles-bam = "0.65" +noodles-sam = "0.62" +noodles = { version = "0.78", features = [ "sam", "bam", "async" ] } [profile.release] lto = true diff --git a/README.md b/README.md index 6955131..40363a8 100644 --- a/README.md +++ b/README.md @@ -89,16 +89,12 @@ Use the exposed functions: ```rust pub fn encrypt( recipient_keys: &HashSet, - read_buffer: &mut R, - write_buffer: &mut W, range_start: usize, range_span: Option ) -> Result<()> pub fn decrypt( keys: Vec, - read_buffer: &mut R, - write_buffer: &mut W, range_start: usize, range_span: Option, sender_pubkey: Option>, @@ -107,15 +103,11 @@ pub fn decrypt( pub fn reencrypt( keys: Vec, recipient_keys: HashSet, - read_buffer: &mut R, - write_buffer: &mut W, trim: bool, ) -> Result<()> pub fn rearrange( keys: Vec, - read_buffer: &mut R, - write_buffer: &mut W, range_start: usize, range_span: Option, ) -> Result<()> diff --git a/src/bin.rs b/src/bin.rs deleted file mode 100644 index d2fe831..0000000 --- a/src/bin.rs +++ /dev/null @@ -1,280 +0,0 @@ -#![allow( - clippy::missing_errors_doc, - clippy::missing_panics_doc, - clippy::module_name_repetitions, - clippy::must_use_candidate, - clippy::cast_possible_truncation, - clippy::similar_names, - clippy::implicit_hasher, - clippy::redundant_else -)] - -use std::collections::HashSet; -use std::fs::remove_file; -use std::io; -use std::io::stdin; -use std::path::{Path, PathBuf}; - -use clap::Parser; -use cli::{Args, Command}; -use crypt4gh::error::Crypt4GHError; -use crypt4gh::keys::{get_private_key, get_public_key}; -use crypt4gh::{self, keys, Keys}; -use regex::Regex; -use rpassword::prompt_password; - -mod cli; - -const PASSPHRASE: &str = "C4GH_PASSPHRASE"; - -fn parse_range(arg: Option) -> Result<(usize, Option), Crypt4GHError> { - match arg { - Some(range) => { - // Capture regex - let range_regex = Regex::new(r"(?P[\d]+)-?(?P[\d]+)?").expect("Bad range regex"); - - match range_regex.captures(&range) { - Some(matched_range) => { - // Get start - let range_start = matched_range - .name("start") - .ok_or(Crypt4GHError::ParseRangeError)? - .as_str() - .parse::() - .map_err(|_| Crypt4GHError::ParseRangeError)?; - - // Get span - let range_span = match matched_range.name("end") { - Some(end) => { - let range_end = end - .as_str() - .parse::() - .map_err(|_| Crypt4GHError::ParseRangeError)?; - - if range_start >= range_end { - return Err(Crypt4GHError::ParseRangeError); - } - - Some(range_end - range_start - 1) - }, - None => None, - }; - - Ok((range_start, range_span)) - }, - None => Err(Crypt4GHError::ParseRangeError), - } - }, - None => Ok((0, None)), - } -} - -fn retrieve_private_key(sk: Option, generate: bool) -> Result, Crypt4GHError> { - let seckey_path = sk; - - if generate && seckey_path.is_none() { - let skey = keys::generate_private_key()?; - log::info!("Generating Private Key: {:02x?}", skey); - Ok(skey) - } - else { - let path = seckey_path.expect("Unable to extract the secret key"); - if !path.is_file() { - return Err(Crypt4GHError::ReadSecretKeyFileError(path)); - } - - let passphrase: Result = match std::env::var(PASSPHRASE) { - Ok(_) => { - log::warn!("Warning: Using a passphrase in an environment variable is insecure"); - std::env::var(PASSPHRASE).map_err(|e| Crypt4GHError::NoPassphrase(e.into())) // TODO: Does this make sure it's set/unset? - }, - Err(_) => { - prompt_password(format!("Passphrase for {:?}: ", path)) - .map_err(|e| Crypt4GHError::NoPassphrase(e.into())) - }, - }; - - get_private_key(path.to_owned(), passphrase) - } -} - -fn build_recipients(recipient_pk: &[PathBuf], sk: &[u8]) -> Result, Crypt4GHError> { - if recipient_pk.is_empty() { - Err(Crypt4GHError::NoRecipients) - } - else { - recipient_pk - .iter() - .filter(|&pk| Path::new(pk).exists()) - .map(|pk| { - Ok(Keys { - method: 0, - privkey: sk.to_vec(), - recipient_pubkey: get_public_key(PathBuf::from(pk))?, - }) - }) - .collect() - } -} - -fn run_encrypt(sk: Option, recipient_pk: &[PathBuf], range: Option) -> Result<(), Crypt4GHError> { - let (range_start, range_span) = parse_range(range)?; - let seckey = retrieve_private_key(sk, true)?; - let recipient_keys = build_recipients(recipient_pk, &seckey)?; - - if recipient_keys.is_empty() { - return Err(Crypt4GHError::NoRecipients); - } - - crypt4gh::encrypt( - &recipient_keys, - &mut io::stdin(), - &mut io::stdout(), - range_start, - range_span, - ) -} - -fn run_decrypt(sk: Option, sender_pk: Option, range: Option) -> Result<(), Crypt4GHError> { - let sender_pubkey = match sender_pk { - Some(path) => Some(keys::get_public_key(path)?), - None => None, - }; - - let (range_start, range_span) = parse_range(range)?; - - let seckey = retrieve_private_key(sk, false)?; - - let keys = vec![Keys { - method: 0, - privkey: seckey, - recipient_pubkey: vec![], - }]; - - //log::debug!("run_decrypt()'s parameters: {:#?}, {}, {:#?}, {:#?}", &keys, range_start, range_span, &sender_pubkey ); - - crypt4gh::decrypt( - &keys, - &mut io::stdin(), - &mut io::stdout(), - range_start, - range_span, - &sender_pubkey, - ) -} - -fn run_rearrange(sk: Option, range: Option) -> Result<(), Crypt4GHError> { - let (range_start, range_span) = parse_range(range)?; - let seckey = retrieve_private_key(sk, false)?; - let pubkey = keys::get_public_key_from_private_key(&seckey)?; - - let keys = vec![Keys { - method: 0, - privkey: seckey, - recipient_pubkey: pubkey, - }]; - - crypt4gh::rearrange(keys, &mut io::stdin(), &mut io::stdout(), range_start, range_span) -} - -fn run_reencrypt(sk: Option, recipient_pk: &[PathBuf], trim: bool) -> Result<(), Crypt4GHError> { - let seckey = retrieve_private_key(sk, false)?; - let recipient_keys = build_recipients(recipient_pk, &seckey)?; - - if recipient_keys.is_empty() { - return Err(Crypt4GHError::NoRecipients); - } - - let keys = vec![Keys { - method: 0, - privkey: seckey, - recipient_pubkey: vec![], - }]; - - crypt4gh::reencrypt(&keys, &recipient_keys, &mut io::stdin(), &mut io::stdout(), trim) -} - -fn run_keygen(sk: PathBuf, pk: PathBuf, comment: Option, nocrypt: bool, force: bool) -> Result<(), Crypt4GHError> { - // Prepare key files - - let seckey = sk; - let pubkey = pk; - - for key in &[seckey.to_owned(), pubkey.to_owned()] { - // If key exists and it is a file - if key.is_file() { - // Force overwrite? - if !force { - eprint!("{} already exists. Do you want to overwrite it? (y/n): ", key.display()); - let mut input = String::new(); - stdin() - .read_line(&mut input) - .map_err(|e| Crypt4GHError::NotEnoughInput(1, e.into()))?; - if input.trim() != "y" { - log::info!("Ok. Exiting."); - return Ok(()); - } - } - remove_file(key).unwrap_or_else(|_| panic!("Unable to remove key file (ERROR = {:?})", key)); - } - } - - // Comment - let comment = comment; - let do_crypt = !nocrypt; - let seckey_display = PathBuf::from(&seckey); - - let passphrase = { - if do_crypt { - prompt_password(format!("Passphrase for {}: ", seckey_display.display())) - .map_err(|e| Crypt4GHError::NoPassphrase(e.into())) - - } else { - Ok(String::new()) - } - }; - - crypt4gh::keys::generate_keys(seckey, pubkey, passphrase, comment) -} - -fn run() -> Result<(), Crypt4GHError> { - let matches = Args::parse(); - - if std::env::var("RUST_LOG").is_err() { - if matches.verbose { - std::env::set_var("RUST_LOG", "trace"); - } - else { - std::env::set_var("RUST_LOG", "warn"); - } - } - - pretty_env_logger::init(); - - match matches.subcommand { - Command::Encrypt { - sk, - recipient_pk, - range, - } => run_encrypt(sk, &recipient_pk, range)?, - Command::Decrypt { sk, sender_pk, range } => run_decrypt(sk, sender_pk, range)?, - Command::Rearrange { sk, range } => run_rearrange(sk, range)?, - Command::Reencrypt { sk, recipient_pk, trim } => run_reencrypt(sk, &recipient_pk, trim)?, - Command::Keygen { - sk, - pk, - comment, - nocrypt, - force, - } => run_keygen(sk, pk, comment, nocrypt, force)?, - } - - Ok(()) -} - -fn main() { - if let Err(err) = run() { - log::error!("{}", err); - std::process::exit(1); - } -} diff --git a/src/cli.rs b/src/cli.rs deleted file mode 100644 index 0fd5782..0000000 --- a/src/cli.rs +++ /dev/null @@ -1,93 +0,0 @@ -use std::path::PathBuf; - -use clap::Subcommand; - -#[derive(Subcommand)] -pub enum Command { - /// Encrypts the input using your (optional) secret key and the public key of the recipient. - Encrypt { - /// Curve25519-based Private key - #[clap(long, env = "C4GH_SECRET_KEY")] - sk: Option, - - /// Recipient's Curve25519-based Public key - #[clap(long = "recipient_pk", num_args = 1..)] - recipient_pk: Vec, - - /// Byte-range either as or just (Start included, End excluded) - #[clap(long)] - range: Option, - }, - /// Decrypts the input using your secret key and the (optional) public key of the sender. - Decrypt { - /// Curve25519-based Private key - #[clap(long, env = "C4GH_SECRET_KEY")] - sk: Option, - - /// Peer's Curve25519-based Public key to verify provenance (akin to signature) - #[clap(long)] - sender_pk: Option, - - /// Byte-range either as or just (Start included, End excluded) - #[clap(long)] - range: Option, - }, - /// Rearranges the input according to the edit list packet. - Rearrange { - /// Curve25519-based Private key - #[clap(long, env = "C4GH_SECRET_KEY")] - sk: Option, - - /// Byte-range either as or just (Start included, End excluded) - #[clap(long)] - range: Option, - }, - /// Decrypts the input using your (optional) secret key and then it reencrypts it using the public key of the recipient. - Reencrypt { - /// Curve25519-based Private key - #[clap(long, env = "C4GH_SECRET_KEY")] - sk: Option, - - /// Recipient's Curve25519-based Public key - #[clap(long = "recipient_pk", num_args = 1..)] - recipient_pk: Vec, - - /// Keep only header packets that you can decrypt - #[clap(short, long)] - trim: bool, - }, - /// Utility to create Crypt4GH-formatted keys. - Keygen { - /// Curve25519-based Private key - #[clap(long, env, default_value = "~/.c4gh/key")] - sk: PathBuf, - - /// Curve25519-based Public key - #[clap(long, env, default_value = "~/.c4gh/key.pub")] - pk: PathBuf, - - /// Key's Comment - #[clap(short, long)] - comment: Option, - - /// Do not encrypt the private key. Otherwise it is encrypted in the Crypt4GH key format (See https://crypt4gh.readthedocs.io/en/latest/keys.html) - #[clap(long)] - nocrypt: bool, - - /// Overwrite the destination files - #[clap(short, long)] - force: bool, - }, -} - -/// Utility for the cryptographic GA4GH standard, reading from stdin and outputting to stdout. -#[derive(clap::Parser)] -#[clap(about, version, author)] -pub struct Args { - /// Sets the level of verbosity - #[clap(short, long)] - pub verbose: bool, - - #[clap(subcommand)] - pub subcommand: Command, -} diff --git a/src/decrypt/builder.rs b/src/decrypt/builder.rs new file mode 100644 index 0000000..ee7ea3c --- /dev/null +++ b/src/decrypt/builder.rs @@ -0,0 +1,96 @@ +use crate::error::Crypt4GHError; +use crate::keys::KeyPair; +use tokio::io::{AsyncRead, AsyncSeek}; +use tokio_util::codec::FramedRead; + +use crate::decrypt::DecryptStream; +use crate::keys::PublicKey; + +/// An decrypter reader builder. +#[derive(Debug, Default)] +pub struct Builder { + sender_pubkey: Option, + stream_length: Option, + edit_list: Option>, +} + +impl Builder { + /// Sets the sender public key + pub fn with_sender_pubkey(self, sender_pubkey: PublicKey) -> Self { + self.set_sender_pubkey(Some(sender_pubkey)) + } + + /// Sets the sender public key + pub fn set_sender_pubkey(mut self, sender_pubkey: Option) -> Self { + self.sender_pubkey = sender_pubkey; + self + } + + /// Sets the stream length. + pub fn with_stream_length(self, stream_length: u64) -> Self { + self.set_stream_length(Some(stream_length)) + } + + /// Sets the stream length. + pub fn set_stream_length(mut self, stream_length: Option) -> Self { + self.stream_length = stream_length; + self + } + + /// Set the edit list manually. + pub fn with_edit_list(self, edit_list: Vec) -> Self { + self.set_edit_list(Some(edit_list)) + } + + /// Set the edit list manually. + pub fn set_edit_list(mut self, edit_list: Option>) -> Self { + self.edit_list = edit_list; + self + } + + /// Build the decrypter. + pub fn build(self, inner: R, keys: Vec) -> DecryptStream + where + R: AsyncRead, + { + DecryptStream { + inner: FramedRead::new(inner, Default::default()), + header_packet_future: None, + keys, + sender_pubkey: self.sender_pubkey, + session_keys: vec![], + encrypted_header_packets: None, + edit_list_packet: DecryptStream::<()>::create_internal_edit_list(self.edit_list), + header_info: None, + header_length: None, + current_block_size: None, + stream_length: self.stream_length, + } + } + + /// Build the decrypter and compute the stream length for seek operations. This function will + /// ensure that recompute_stream_length is called at least once on the decrypter stream. + /// + /// This means that data block positions past the end of the stream will be valid and will equal + /// the the length of the stream. Use the build function if this behaviour is not desired. Seeking + /// past the end of the stream without a stream length is allowed but the behaviour is dependent + /// on the underlying reader and data block positions may not be valid. + pub async fn build_with_stream_length( + self, + inner: R, + keys: Vec, + ) -> Result, Crypt4GHError> + where + R: AsyncRead + AsyncSeek + Unpin, + { + //let stream_length = self.stream_length; + let stream = self.build(inner, keys); + + // FIXME: Why is calculating stream "length" necessary? + // if stream_length.is_none() { + // stream.recompute_stream_length().await?; + // } + + Ok(stream) + } +} diff --git a/src/decrypt/data_block.rs b/src/decrypt/data_block.rs new file mode 100644 index 0000000..042d93b --- /dev/null +++ b/src/decrypt/data_block.rs @@ -0,0 +1,169 @@ +use std::future::Future; +use std::io::Cursor; +use std::ops::Deref; +use std::pin::Pin; +use std::task::{Context, Poll}; + +use bytes::Bytes; +use crate::{body_decrypt, WriteInfo}; +use pin_project_lite::pin_project; +use tokio::task::JoinHandle; + +use crate::decrypt::DecryptStream; +use crate::error::Crypt4GHError::{self, JoinHandleError}; + +pin_project! { + #[must_use = "futures do nothing unless you `.await` or poll them"] + pub struct DataBlockDecrypter { + #[pin] + handle: JoinHandle> + } +} + +/// Represents the decrypted data block and its original encrypted size. +#[derive(Debug, Default)] +pub struct DecryptedDataBlock { + bytes: DecryptedBytes, + encrypted_size: usize, +} + +impl DecryptedDataBlock { + /// Create a new decrypted data block. + pub fn new(bytes: DecryptedBytes, encrypted_size: usize) -> Self { + Self { + bytes, + encrypted_size, + } + } + + /// Get the plain text bytes. + pub fn bytes(&self) -> &DecryptedBytes { + &self.bytes + } + + /// Get the encrypted size. + pub fn encrypted_size(&self) -> usize { + self.encrypted_size + } + + /// Get the inner bytes and size. + pub fn into_inner(self) -> (DecryptedBytes, usize) { + (self.bytes, self.encrypted_size) + } + + /// Get the length of the decrypted bytes. + pub const fn len(&self) -> usize { + self.bytes.len() + } + + /// Check if the decrypted bytes are empty + pub const fn is_empty(&self) -> bool { + self.bytes.is_empty() + } +} + +impl Deref for DecryptedDataBlock { + type Target = [u8]; + + #[inline] + fn deref(&self) -> &[u8] { + self.bytes.deref() + } +} + +/// A wrapper around a vec of bytes that represents decrypted data. +#[derive(Debug, Default, Clone)] +pub struct DecryptedBytes(Bytes); + +impl DecryptedBytes { + /// Create new decrypted bytes from bytes. + pub fn new(bytes: Bytes) -> Self { + Self(bytes) + } + + /// Get the inner bytes. + pub fn into_inner(self) -> Bytes { + self.0 + } + + /// Get the length of the inner bytes. + pub const fn len(&self) -> usize { + self.0.len() + } + + /// Check if the inner bytes are empty. + pub const fn is_empty(&self) -> bool { + self.0.is_empty() + } +} + +impl Deref for DecryptedBytes { + type Target = [u8]; + + #[inline] + fn deref(&self) -> &[u8] { + self.0.deref() + } +} + + +impl DataBlockDecrypter { + pub fn new( + data_block: Bytes, + session_keys: Vec>, + edit_list_packet: Option>, + ) -> Self { + Self { + handle: tokio::task::spawn_blocking(move || { + DataBlockDecrypter::decrypt(data_block, session_keys, edit_list_packet) + }), + } + } + + pub fn decrypt( + data_block: Bytes, + session_keys: Vec>, + edit_list_packet: Option>, + ) -> Result { + let size = data_block.len(); + + let read_buf = Cursor::new(data_block.to_vec()); + let mut write_buf = Cursor::new(vec![]); + let mut write_info = WriteInfo::new(0, None, &mut write_buf); + + // Todo crypt4gh-rust body_decrypt_parts does not work properly, so just apply edit list here. + body_decrypt(read_buf, session_keys.as_slice(), &mut write_info, 0) + .map_err(|err| Crypt4GHError::UnableToDecryptBlock(read_buf.into_inner(), err.to_string()))?; + let mut decrypted_bytes: Bytes = write_buf.into_inner().into(); + let mut edited_bytes = Bytes::new(); + + let edits = DecryptStream::<()>::create_internal_edit_list(edit_list_packet) + .unwrap_or(vec![(false, decrypted_bytes.len() as u64)]); + if edits.iter().map(|(_, edit)| edit).sum::() > decrypted_bytes.len() as u64 { + return Err(Crypt4GHError::InvalidEditList); + } + + edits.into_iter().for_each(|(discarding, edit)| { + if !discarding { + let edit = decrypted_bytes.slice(0..edit as usize); + edited_bytes = [edited_bytes.clone(), edit].concat().into(); + } + + decrypted_bytes = decrypted_bytes.slice(edit as usize..); + }); + + Ok(DecryptedDataBlock::new( + DecryptedBytes::new(edited_bytes), + size, + )) + } +} + +impl Future for DataBlockDecrypter { + type Output = Result; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + self.project().handle.poll(cx).map_err(JoinHandleError)? + } +} + diff --git a/src/decrypt/mod.rs b/src/decrypt/mod.rs new file mode 100644 index 0000000..67624d0 --- /dev/null +++ b/src/decrypt/mod.rs @@ -0,0 +1,405 @@ +pub mod builder; +pub mod data_block; +pub mod reader; + +use std::cmp::min; +use std::io::SeekFrom; +use std::pin::Pin; +use std::task::{Context, Poll}; + +use bytes::Bytes; +use reader::decode::{Block, DecodedBlock}; +use futures::ready; +use futures::Stream; +use pin_project_lite::pin_project; +use tokio::io::{AsyncRead, AsyncSeek, AsyncSeekExt}; +use tokio_util::codec::FramedRead; + +use crate::decrypt::data_block::DataBlockDecrypter; +use crate::error::Crypt4GHError; +use crate::header::Header; +use crate::keys::KeyPair; +use crate::{util, keys::PublicKey}; + +use futures::Future; + +pin_project! { + /// A decrypter for an entire AsyncRead Crypt4GH file. + pub struct DecryptStream { + #[pin] + inner: FramedRead, + #[pin] + header_packet_future: Option, + keys: Vec, + sender_pubkey: Option, + encrypted_header_packets: Option>, + header_info: Option
, + session_keys: Vec>, + edit_list_packet: Option>, + header_length: Option, + current_block_size: Option, + stream_length: Option, + } +} + +impl DecryptStream +where + R: AsyncRead, +{ + /// Partitions the edit list packet so that it applies to the current data block, returning a new + /// edit list that correctly discards and keeps the specified bytes this particular data block. + /// Todo, this should possibly go into the decoder, where bytes can be skipped directly. + pub fn partition_edit_list(mut self: Pin<&mut Self>, data_block: &Bytes) -> Option> { + let this = self.as_mut().project(); + + if let Some(edit_list) = this.edit_list_packet { + let mut new_edit_list = vec![]; + let mut bytes_consumed = 0; + + edit_list.retain_mut(|(discarding, value)| { + // If this is not a discarding edit, then discard 0 at the start. + if !*discarding && new_edit_list.is_empty() { + new_edit_list.push(0); + } + + // Get the encrypted block size. + let data_block_len = data_block.len() as u64 - Block::nonce_size() - Block::mac_size(); + + // Can only consume as many bytes as there are in the data block. + if min(bytes_consumed + *value, data_block_len) == data_block_len { + if bytes_consumed != data_block_len { + // If the whole data block hasn't been consumed yet, an edit still needs to be added. + let last_edit = data_block_len - bytes_consumed; + new_edit_list.push(last_edit); + + // And remove this edit from the next value. + *value -= last_edit; + // Now the whole data block has been consumed. + bytes_consumed = data_block_len; + } + + // Keep all values from now. + true + } else { + // Otherwise, consume the value and remove it from the edit list packet. + bytes_consumed += *value; + new_edit_list.push(*value); + false + } + }); + + (!new_edit_list.is_empty()).then_some(new_edit_list) + } else { + // If there is no edit list to begin with, we just keep the whole block. + None + } + } + + /// Polls a data block. This function shouldn't execute until all the header packets have been + /// processed. + pub fn poll_data_block( + mut self: Pin<&mut Self>, + data_block: Bytes, + ) -> Poll>> { + let edit_list = self.as_mut().partition_edit_list(&data_block); + + let this = self.project(); + Poll::Ready(Some(Ok(DataBlockDecrypter::new( + data_block, + // Todo make this so it doesn't use owned Keys and SenderPublicKey as it will be called asynchronously. + this.session_keys.clone(), + edit_list, + )))) + } + + /// Poll the stream until the header packets and session keys are processed. + pub fn poll_session_keys(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Only execute this function if there are no session keys. + if !self.session_keys.is_empty() { + return Poll::Ready(Ok(())); + } + + // Header packets are waiting to be decrypted. + if let Some(header_packet_decrypter) = self.as_mut().project().header_packet_future.as_pin_mut() + { + return match ready!(header_packet_decrypter.poll(cx)) { + Ok(header_packets) => { + let mut this = self.as_mut().project(); + + // Update the session keys and edit list packets. + this.header_packet_future.set(None); + this.session_keys.extend(header_packets.data_enc_packets); + if this.edit_list_packet.is_none() { + *this.edit_list_packet = + Self::create_internal_edit_list(header_packets.edit_list_packet); + } + + Poll::Ready(Ok(())) + } + Err(err) => Poll::Ready(Err(err)), + }; + } + + // No header packets yet, so more data needs to be decoded. + let mut this = self.as_mut().project(); + match ready!(this.inner.poll_next(cx)) { + Some(Ok(buf)) => match buf { + DecodedBlock::Header(header_info) => { + // Store the header info but otherwise ignore it and poll again. + *this.header_info = Some(header_info); + cx.waker().wake_by_ref(); + Poll::Pending + } + // todo no clones here. + DecodedBlock::HeaderPackets(header_packets) => { + // Update the header length because we have access to the header packets. + let (header_packets, header_length) = header_packets.into_inner(); + *this.encrypted_header_packets = Some(header_packets.clone()); + *this.header_length = Some(header_length + Block::header_info_size()); + + // Add task for decrypting the header packets. + this + .header_packet_future + .set(Some(HeaderPacketsDecrypter::new( + header_packets + .into_iter() + .map(|packet| packet.into_header_bytes()) + .collect(), + this.keys.clone(), + this.sender_pubkey.clone(), + ))); + + // Poll again. + cx.waker().wake_by_ref(); + Poll::Pending + } + DecodedBlock::DataBlock(_) => Poll::Ready(Crypt4GHError::UnableToDecryptBlock(buf, + "data block reached without finding session keys".to_string(), + )), + }, + Some(Err(e)) => Poll::Ready(Err(e)), + None => Poll::Ready(Crypt4GHError::EndOfStreamReached( + "end of stream reached without finding session keys".to_string(), + )), + } + } + + /// Convenience for calling [`poll_session_keys`] on [`Unpin`] types. + pub fn poll_session_keys_unpin(&mut self, cx: &mut Context<'_>) -> Poll> + where + Self: Unpin, + { + Pin::new(self).poll_session_keys(cx) + } + + /// Poll the stream until the header has been read. + pub async fn read_header(&mut self) -> Result<(), Crypt4GHError> + where + R: Unpin, + { + SessionKeysFuture::new(self).await + } +} + +impl DecrypterStream { + /// An override for setting the stream length. + pub async fn set_stream_length(&mut self, length: u64) { + self.stream_length = Some(length); + } + + /// Get a reference to the inner reader. + pub fn get_ref(&self) -> &R { + self.inner.get_ref() + } + + /// Get a mutable reference to the inner reader. + pub fn get_mut(&mut self) -> &mut R { + self.inner.get_mut() + } + + /// Get a pinned mutable reference to the inner reader. + pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut R> { + self.project().inner.get_pin_mut() + } + + /// Get the inner reader. + pub fn into_inner(self) -> R { + self.inner.into_inner() + } + + /// Get the length of the header, including the magic string, version number, packet count + /// and the header packets. Returns `None` before the header packet is polled. + pub fn header_size(&self) -> Option { + self.header_length + } + + /// Get the size of the current data block represented by the encrypted block returned by calling + /// poll_next. This will equal `decoder::DATA_BLOCK_SIZE` except for the last block which may be + /// less than that. Returns `None` before the first data block is polled. + pub fn current_block_size(&self) -> Option { + self.current_block_size + } + + /// Clamps the byte position to the nearest data block if the header length is known. This + /// function takes into account the stream length if it is present. + pub fn clamp_position(&self, position: u64) -> Option { + self.header_size().map(|length| { + if position < length { + length + } else { + match self.stream_length { + Some(end_length) if position >= end_length => end_length, + _ => { + let remainder = (position - length) % Block::standard_data_block_size(); + + position - remainder + } + } + } + }) + } + + /// Convert an unencrypted position to an encrypted position if the header length is known. + pub fn to_encrypted(&self, position: u64) -> Option { + self.header_size().map(|length| { + let encrypted_position = util::to_encrypted(position, length); + + match self.stream_length { + Some(end_length) if encrypted_position + Block::mac_size() > end_length => end_length, + _ => encrypted_position, + } + }) + } + + /// Get the session keys. Empty before the header is polled. + pub fn session_keys(&self) -> &[Vec] { + &self.session_keys + } + + /// Get the edit list packet. Empty before the header is polled. + pub fn edit_list_packet(&self) -> Option> { + self + .edit_list_packet + .as_ref() + .map(|packet| packet.iter().map(|(_, edit)| *edit).collect()) + } + + /// Get the header info. + pub fn header_info(&self) -> Option<&Header> { + self.header_info.as_ref() + } + + /// Get the original encrypted header packets, not including the header info. + pub fn encrypted_header_packets(&self) -> Option<&Vec> { + self.encrypted_header_packets.as_ref() + } + + /// Get the stream's keys. + pub fn keys(&self) -> &[KeyPairInfo] { + self.keys.as_slice() + } + + pub(crate) fn create_internal_edit_list(edit_list: Option>) -> Option> { + edit_list.map(|edits| [true, false].iter().cloned().cycle().zip(edits).collect()) + } +} + +impl DecrypterStream +where + R: AsyncRead + AsyncSeek + Unpin, +{ + /// Recompute the stream length. Having a stream length means that data block positions past the + /// end of the stream will be valid and will equal the the length of the stream. By default this + /// struct contains no stream length when it is initialized. + /// + /// This can take up to 3 seek calls. If the size of the underlying buffer changes, this function + /// should be called again, otherwise data block positions may not be valid. + pub async fn recompute_stream_length(&mut self) -> Result { + let inner = self.inner.get_mut(); + + let position = inner.seek(SeekFrom::Current(0)).await?; + let length = inner.seek(SeekFrom::End(0)).await?; + + if position != length { + inner.seek(SeekFrom::Start(position)).await?; + } + + self.stream_length = Some(length); + + Ok(length) + } +} + +impl Stream for DecrypterStream +where + R: AsyncRead, +{ + type Item = Result; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // When polling, we first need to process enough data to get the session keys. + if let Err(err) = ready!(self.as_mut().poll_session_keys(cx)) { + return Poll::Ready(Some(Err(err))); + } + + let this = self.as_mut().project(); + let item = this.inner.poll_next(cx); + + match ready!(item) { + Some(Ok(buf)) => match buf { + DecodedBlock::Header(_) | DecodedBlock::HeaderPackets(_) => { + // Session keys have already been read, so ignore the header info and header packets + // and poll again + cx.waker().wake_by_ref(); + Poll::Pending + } + DecodedBlock::DataBlock(data_block) => { + // The new size of the data block is available, so update it. + *this.current_block_size = Some(data_block.len()); + + // Session keys have been obtained so process the data blocks. + self.poll_data_block(data_block) + } + }, + Some(Err(e)) => Poll::Ready(Some(Err(e))), + None => Poll::Ready(None), + } + } +} + +impl DecrypterStream +where + R: AsyncRead + AsyncSeek + Unpin + Send, +{ + /// Seek to a position in the encrypted stream. + pub async fn seek_encrypted(&mut self, position: SeekFrom) -> io::Result { + // Make sure that session keys are polled. + self.read_header().await?; + + // First poll to the position specified. + let seek = self.inner.get_mut().seek(position).await?; + + // Then advance to the correct data block position. + let advance = self.advance_encrypted(seek).await?; + + // Then seek to the correct position. + let seek = self.inner.get_mut().seek(SeekFrom::Start(advance)).await?; + self.inner.read_buffer_mut().clear(); + + Ok(seek) + } + + /// Seek to a position in the unencrypted stream. + pub async fn seek_unencrypted(&mut self, position: u64) -> io::Result { + // Make sure that session keys are polled. + self.read_header().await?; + + // Convert to an encrypted position and seek + let position = self + .to_encrypted(position) + .ok_or_else(|| Crypt4GHError("Unable to convert to encrypted position.".to_string()))?; + + // Then do the seek. + self.seek_encrypted(SeekFrom::Start(position)).await + } +} \ No newline at end of file diff --git a/src/decrypt/reader/builder.rs b/src/decrypt/reader/builder.rs new file mode 100644 index 0000000..96be66e --- /dev/null +++ b/src/decrypt/reader/builder.rs @@ -0,0 +1,113 @@ +use std::thread; + +use crate::error::Crypt4GHError; +use futures::Stream; +use futures_util::TryStreamExt; +use tokio::io::{AsyncRead, AsyncSeek}; + +use crate::decrypt::builder::Builder as DecrypterBuilder; +use crate::decrypt::DecryptStream; +use crate::keys::{KeyPair, PublicKey}; + +use super::Reader; + +/// An async Crypt4GH reader builder. +#[derive(Debug, Default)] +pub struct Builder { + worker_count: Option, + sender_pubkey: Option, + stream_length: Option, +} + +impl Builder { + /// Sets a worker count. + pub fn with_worker_count(self, worker_count: usize) -> Self { + self.set_worker_count(Some(worker_count)) + } + + /// Sets the sender public key + pub fn with_sender_pubkey(self, sender_pubkey: PublicKey) -> Self { + self.set_sender_pubkey(Some(sender_pubkey)) + } + + /// Sets a worker count. + pub fn set_worker_count(mut self, worker_count: Option) -> Self { + self.worker_count = worker_count; + self + } + + /// Sets the sender public key + pub fn set_sender_pubkey(mut self, sender_pubkey: Option) -> Self { + self.sender_pubkey = sender_pubkey; + self + } + + /// Sets the stream length. + pub fn with_stream_length(self, stream_length: u64) -> Self { + self.set_stream_length(Some(stream_length)) + } + + /// Sets the stream length. + pub fn set_stream_length(mut self, stream_length: Option) -> Self { + self.stream_length = stream_length; + self + } + + /// Build the Crypt4GH reader. + pub fn build_with_reader(self, inner: R, keys: Vec) -> Reader + where + R: AsyncRead, + { + let worker_counter = self.worker_count(); + + Reader { + stream: DecrypterBuilder::default() + .set_sender_pubkey(self.sender_pubkey) + .set_stream_length(self.stream_length) + .build(inner, keys) + .try_buffered(worker_counter), + // Dummy value for bytes to begin with. + current_block: Default::default(), + buf_position: 0, + block_position: None, + } + } + + /// Build the reader and compute the stream length for seek operations. + pub async fn build_with_stream_length(self, inner: R, keys: Vec) -> Result, Crypt4GHError> + where + R: AsyncRead + AsyncSeek + Unpin + Stream, + { + //let stream_length = self.stream_length; + let reader = self.build_with_reader(inner, keys); + + // FIXME: Why do we need to determine a stream length? + // if stream_length.is_none() { + // reader.stream.get_mut().recompute_stream_length().await?; + // } + + Ok(reader) + } + + /// Build the Crypt4GH reader with a decryper stream. + pub fn build_with_stream(self, stream: DecryptStream) -> Reader + where + R: AsyncRead, + { + Reader { + stream: stream.try_buffered(self.worker_count()), + // Dummy value for bytes to begin with. + current_block: Default::default(), + buf_position: 0, + block_position: None, + } + } + + fn worker_count(&self) -> usize { + self.worker_count.unwrap_or_else(|| { + thread::available_parallelism() + .map(|worker_count| worker_count.get()) + .unwrap_or_else(|_| 1) + }) + } +} diff --git a/src/decrypt/reader/decode.rs b/src/decrypt/reader/decode.rs new file mode 100644 index 0000000..75b52eb --- /dev/null +++ b/src/decrypt/reader/decode.rs @@ -0,0 +1,240 @@ +use std::io; + +use bytes::{Bytes, BytesMut}; +use tokio_util::codec::Decoder; + +use crate::{error::Crypt4GHError::{ + self, NumericConversionError, SliceConversionError +}, header::HeaderPacket, header::Header}; +pub const ENCRYPTED_BLOCK_SIZE: usize = 65536; +pub const NONCE_SIZE: usize = 12; // ChaCha20 IETF Nonce size +pub const MAC_SIZE: usize = 16; + +const DATA_BLOCK_SIZE: usize = NONCE_SIZE + ENCRYPTED_BLOCK_SIZE + MAC_SIZE; + +const MAGIC_STRING_SIZE: usize = 8; +const VERSION_STRING_SIZE: usize = 4; +const HEADER_PACKET_COUNT_SIZE: usize = 4; + +pub const HEADER_INFO_SIZE: usize = + MAGIC_STRING_SIZE + VERSION_STRING_SIZE + HEADER_PACKET_COUNT_SIZE; + +const HEADER_PACKET_LENGTH_SIZE: usize = 4; + +/// Maximum header size +/// FIXME: Does this comply with the spec? +const MAX_HEADER_SIZE: usize = 8 * 1024 * 1024; + +/// The type that a block is decoded into. +#[derive(Debug)] +pub enum DecodedBlock { + /// The magic string, version string and header packet count. + /// Corresponds to `deconstruct_header_info`. + Header(Header), + /// Header packets, both data encryption key packets and a data edit list packets. + /// Corresponds to `deconstruct_header_body`. + HeaderPackets(HeaderPacket), + /// The encrypted data blocks + /// Corresponds to `body_decrypt`. + DataBlock(Bytes), +} + +/// State to keep track of the current block being decoded corresponding to `BlockType`. +#[derive(Debug)] +enum BlockState { + /// Expecting header info. + Header, + /// Expecting header packets and the number of header packets left to decode. + HeaderPackets(u32), + /// Expecting a data block. + DataBlock, + /// Expecting the end of the file. This is to account for the last data block potentially being + /// shorter. + Eof, +} + +#[derive(Debug)] +pub struct Block { + next_block: BlockState, +} + +impl Block { + fn get_header_info(src: &mut BytesMut) -> Result { + deserialize_header_info( + src + .split_to(HEADER_INFO_SIZE) + .as_ref() + .try_into() + .map_err(|_| SliceConversionError)?, + ) + } + + /// Parses the header info, updates the state and returns the block type. Unlike the other + /// `decode` methods, this method parses the header info before returning a decoded block + /// because the header info contains the number of packets which is required for decoding + /// the rest of the source. + pub fn decode_header_info(&mut self, src: &mut BytesMut) -> Result, Crypt4GHError> { + // Header info is a fixed size. + if src.len() < HEADER_INFO_SIZE { + src.reserve(HEADER_INFO_SIZE); + return Ok(None); + } + + // Parse the header info because it contains the number of header packets. + let header_info = Self::get_header_info(src)?; + + self.next_block = BlockState::HeaderPackets(header_info.packets_count); + + Ok(Some(DecodedBlock::Header(header_info))) + } + + /// Decodes header packets, updates the state and returns a header packet block type. + pub fn decode_header_packets( + &mut self, + src: &mut BytesMut, + header_packets: u32, + ) -> Result, Crypt4GHError> { + let mut header_packet_bytes = vec![]; + for _ in 0..header_packets { + // Get enough bytes to read the header packet length. + if src.len() < HEADER_PACKET_LENGTH_SIZE { + src.reserve(HEADER_PACKET_LENGTH_SIZE); + return Ok(None); + } + + // Read the header packet length. + let length_bytes = src.split_to(HEADER_PACKET_LENGTH_SIZE).freeze(); + let mut length: usize = u32::from_le_bytes( + length_bytes + .as_ref() + .try_into() + .map_err(|_| SliceConversionError)?, + ) + .try_into() + .map_err(|_| NumericConversionError)?; + + // We have already taken 4 bytes out of the length. + length -= HEADER_PACKET_LENGTH_SIZE; + + // FIXME: Shouldn't those bytes be known at compile time? + // Get enough bytes to read the entire header packet. + if src.len() < length { + src.reserve(length - src.len()); + return Ok(None); + } + + header_packet_bytes.push(EncryptedHeaderPacketBytes::new( + length_bytes, + src.split_to(length).freeze(), + )); + } + + self.next_block = BlockState::DataBlock; + + let header_length = u64::try_from( + header_packet_bytes + .iter() + .map(|packet| packet.packet_length().len() + packet.header().len()) + .sum::(), + ) + .map_err(|_| NumericConversionError)?; + + Ok(Some(DecodedBlock::HeaderPackets( + EncryptedHeaderPackets::new(header_packet_bytes, header_length), + ))) + } + + /// Decodes data blocks, updates the state and returns a data block type. + pub fn decode_data_block(&mut self, src: &mut BytesMut) -> Result, Crypt4GHError> { + // Data blocks are a fixed size, so we can return the + // next data block without much processing. + if src.len() < DATA_BLOCK_SIZE { + src.reserve(DATA_BLOCK_SIZE); + return Ok(None); + } + + self.next_block = BlockState::DataBlock; + + Ok(Some(DecodedBlock::DataBlock( + src.split_to(DATA_BLOCK_SIZE).freeze(), + ))) + } + + /// Get the standard size of all non-ending data blocks. + pub const fn standard_data_block_size() -> u64 { + DATA_BLOCK_SIZE as u64 + } + + /// Get the size of the magic string, version and header packet count. + pub const fn header_info_size() -> u64 { + HEADER_INFO_SIZE as u64 + } + + /// Get the encrypted block size, without nonce and mac bytes. + pub const fn encrypted_block_size() -> u64 { + ENCRYPTED_BLOCK_SIZE as u64 + } + + /// Get the size of the nonce. + pub const fn nonce_size() -> u64 { + NONCE_SIZE as u64 + } + + /// Get the size of the mac. + pub const fn mac_size() -> u64 { + MAC_SIZE as u64 + } + + /// Get the maximum possible header size. + pub const fn max_header_size() -> u64 { + MAX_HEADER_SIZE as u64 + } +} + +impl Default for Block { + fn default() -> Self { + Self { + next_block: BlockState::Header, + } + } +} + +impl Decoder for Block { + type Item = DecodedBlock; + type Error = Crypt4GHError; + + fn decode(&mut self, src: &mut BytesMut) -> Result, Crypt4GHError> { + match self.next_block { + BlockState::Header => self.decode_header_info(src), + BlockState::HeaderPackets(header_packets) => self.decode_header_packets(src, header_packets), + BlockState::DataBlock => self.decode_data_block(src), + BlockState::Eof => Ok(None), + } + } + + fn decode_eof(&mut self, buf: &mut BytesMut) -> Result, Crypt4GHError> { + // Need a custom implementation of decode_eof because the last data block can be shorter. + match self.decode(buf)? { + Some(frame) => Ok(Some(frame)), + None => { + if buf.is_empty() { + Ok(None) + } else if let BlockState::DataBlock = self.next_block { + // The last data block can be smaller than 64KiB. + if buf.len() <= DATA_BLOCK_SIZE { + self.next_block = BlockState::Eof; + + Ok(Some(DecodedBlock::DataBlock(buf.split().freeze()))) + } else { + Err(Crypt4GHError::UnableToDecryptBlock(buf.to_vec(), + "the last data block is too large".to_string(), + )) + } + } else { + Err(io::Error::new(io::ErrorKind::Other, "bytes remaining on stream").into()) + } + } + } + } +} + diff --git a/src/decrypt/reader/mod.rs b/src/decrypt/reader/mod.rs new file mode 100644 index 0000000..8d82e7b --- /dev/null +++ b/src/decrypt/reader/mod.rs @@ -0,0 +1,220 @@ +use std::io::SeekFrom; +use std::pin::Pin; +use std::task::{Context, Poll}; +use std::{cmp, io}; + +use crate::decrypt::reader::decode::DecodedBlock::Header; +use crate::keys::KeyPairInfo; +use futures::ready; +use futures::stream::TryBuffered; +use futures::Stream; +use pin_project_lite::pin_project; +use tokio::io::{AsyncBufRead, AsyncRead, AsyncSeek, ReadBuf}; + +use crate::decrypt::reader::decode::Block; +use crate::error::Crypt4GHError::{self, NumericConversionError}; +use crate::decrypt::reader::builder::Builder; +use crate::{DecryptedDataBlock, header::EncryptedHeaderPacketBytes}; + +use crate::decrypt::DecryptStream; + +pub mod builder; +pub(crate) mod decode; + +pin_project! { + pub struct Reader + where R: AsyncRead + { + #[pin] + stream: TryBuffered>, + current_block: DecryptedDataBlock, + // The current position in the decrypted buffer. + buf_position: usize, + // The encrypted position of the current data block minus the size of the header. + block_position: Option + } +} + +impl Reader +where + R: AsyncRead, +{ + /// Gets the position of the data block which includes the current position of the underlying + /// reader. This function will return a value that always corresponds the beginning of a data + /// block or `None` if the reader has not read any bytes. + pub fn current_block_position(&self) -> Option { + self.block_position + } + + /// Gets the position of the next data block from the current position of the underlying reader. + /// This function will return a value that always corresponds the beginning of a data block, the + /// size of the file, or `None` if the reader has not read any bytes. + pub fn next_block_position(&self) -> Option { + self.block_position.and_then(|block_position| { + self + .stream + .get_ref() + .clamp_position(block_position + Block::standard_data_block_size()) + }) + } + + /// Get a reference to the inner reader. + pub fn get_ref(&self) -> &R { + self.stream.get_ref().get_ref() + } + + /// Get a mutable reference to the inner reader. + pub fn get_mut(&mut self) -> &mut R { + self.stream.get_mut().get_mut() + } + + /// Get a pinned mutable reference to the inner reader. + pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut R> { + self.project().stream.get_pin_mut().get_pin_mut() + } + + /// Get the inner reader. + pub fn into_inner(self) -> R { + self.stream.into_inner().into_inner() + } + + /// Get the session keys. Empty before the header is polled. + pub fn session_keys(&self) -> &[Vec] { + self.stream.get_ref().session_keys() + } + + /// Get the edit list packet. Empty before the header is polled. + pub fn edit_list_packet(&self) -> Option> { + self.stream.get_ref().edit_list_packet() + } + + /// Get the header info. + pub fn header_info(&self) -> Option<&Header> { + self.stream.get_ref().header_info() + } + + /// Get the header size + pub fn header_size(&self) -> Option { + self.stream.get_ref().header_size() + } + + /// Get the original encrypted header packets, not including the header info. + pub fn encrypted_header_packets(&self) -> Option<&Vec> { + self.stream.get_ref().encrypted_header_packets() + } + + /// Poll the reader until the header has been read. + pub async fn read_header(&mut self) -> Result<(), Crypt4GHError> + where + R: Unpin, + { + self.stream.get_mut().read_header().await + } + + /// Get the reader's keys. + pub fn keys(&self) -> &[KeyPairInfo] { + self.stream.get_ref().keys() + } +} + +impl From> for Reader +where + R: AsyncRead, +{ + fn from(stream: DecryptStream) -> Self { + Builder::default().build_with_stream(stream) + } +} + +impl AsyncRead for Reader +where + R: AsyncRead, +{ + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut ReadBuf<'_>, + ) -> Poll> { + // Defer to poll_fill_buf to do the read. + let src = ready!(self.as_mut().poll_fill_buf(cx))?; + + // Calculate the correct amount to read and copy over to the read buf. + let amt = cmp::min(src.len(), buf.remaining()); + buf.put_slice(&src[..amt]); + + // Inform the internal buffer that amt has been consumed. + self.consume(amt); + + Poll::Ready(Ok(())) + } +} + +impl AsyncBufRead for Reader +where + R: AsyncRead, +{ + fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = self.project(); + + // If this is the beginning of the stream, set the block position to the header length, if any. + if let (None, length @ Some(_)) = ( + this.block_position.as_ref(), + this.stream.get_ref().header_size(), + ) { + *this.block_position = length; + } + + // If the position is past the end of the buffer, then all the data has been read and a new + // buffer should be initialised. + if *this.buf_position >= this.current_block.len() { + match ready!(this.stream.poll_next(cx)) { + Some(Ok(block)) => { + // Update the block position with the previous block size. + *this.block_position = Some( + this.block_position.unwrap_or_default() + + u64::try_from(this.current_block.encrypted_size()) + .map_err(|_| NumericConversionError)?, + ); + + // We have a new buffer, reinitialise the position and buffer. + *this.current_block = block; + *this.buf_position = 0; + } + Some(Err(e)) => return Poll::Ready(Err(e.into())), + None => return Poll::Ready(Ok(&[])), + } + } + + // Return the unconsumed data from the buffer. + Poll::Ready(Ok(&this.current_block[*this.buf_position..])) + } + + fn consume(self: Pin<&mut Self>, amt: usize) { + let this = self.project(); + // Update the buffer position until the consumed amount reaches the end of the buffer. + *this.buf_position = cmp::min(*this.buf_position + amt, this.current_block.len()); + } +} + +impl Reader +where + R: AsyncRead + AsyncSeek + Unpin + Send, +{ + /// Seek to a position in the encrypted stream. + pub async fn seek_encrypted(&mut self, position: SeekFrom) -> io::Result { + let position = self.stream.get_mut().seek_encrypted(position).await?; + + self.block_position = Some(position); + + Ok(position) + } + + /// Seek to a position in the unencrypted stream. + pub async fn seek_unencrypted(&mut self, position: u64) -> io::Result { + let position = self.stream.get_mut().seek_unencrypted(position).await?; + + self.block_position = Some(position); + + Ok(position) + } +} \ No newline at end of file diff --git a/src/edit_lists.rs b/src/edit_lists.rs new file mode 100644 index 0000000..fa9bdf8 --- /dev/null +++ b/src/edit_lists.rs @@ -0,0 +1,234 @@ +use std::collections::HashSet; + +use crate::keys::KeyPair; +use crate::header::Header; +use crate::keys::PrivateKey; +use tokio::io::AsyncRead; + +use crate::error::Crypt4GHError; +use crate::decrypt::reader::Reader; +use crate::keys::PublicKey; + +/// Unencrypted byte range positions. Contains inclusive start values and exclusive end values. +#[derive(Debug, Clone)] +pub struct UnencryptedPosition { + start: u64, + end: u64, +} + +impl UnencryptedPosition { + pub fn new(start: u64, end: u64) -> Self { + Self { start, end } + } + + pub fn start(&self) -> u64 { + self.start + } + + pub fn end(&self) -> u64 { + self.end + } +} + +/// Encrypted byte range positions. Contains inclusive start values and exclusive end values. +#[derive(Debug, Clone)] +pub struct ClampedPosition { + start: u64, + end: u64, +} + +impl ClampedPosition { + pub fn new(start: u64, end: u64) -> Self { + Self { start, end } + } + + pub fn start(&self) -> u64 { + self.start + } + + pub fn end(&self) -> u64 { + self.end + } +} + +impl Header { + pub fn new(header_info: Vec, original_header: Vec, edit_list_packet: Vec) -> Self { + Self { + header_info, + original_header, + edit_list_packet, + } + } + + pub fn into_inner(self) -> (Vec, Vec, Vec) { + ( + self.header_info, + self.original_header, + self.edit_list_packet, + ) + } + + pub fn as_slice(&self) -> Vec { + [ + self.header_info.as_slice(), + self.original_header.as_slice(), + self.edit_list_packet.as_slice(), + ] + .concat() + } +} + +impl From<(Vec, Vec, Vec)> for Header { + fn from((header_info, original_header, edit_list_packet): (Vec, Vec, Vec)) -> Self { + Self::new(header_info, original_header, edit_list_packet) + } +} + +pub struct EditHeader<'a, R> +where + R: AsyncRead + Unpin, +{ + reader: &'a Reader, + unencrypted_positions: Vec, + clamped_positions: Vec, + private_key: PrivateKey, + recipient_public_key: PublicKey, +} + +impl<'a, R> EditHeader<'a, R> +where + R: AsyncRead + Unpin, +{ + pub fn new( + reader: &'a Reader, + unencrypted_positions: Vec, + clamped_positions: Vec, + private_key: PrivateKey, + recipient_public_key: PublicKey, + ) -> Self { + Self { + reader, + unencrypted_positions, + clamped_positions, + private_key, + recipient_public_key, + } + } + + /// Encrypt the edit list packet. + pub fn encrypt_edit_list(&self, edit_list_packet: Vec) -> Result, Crypt4GHError> { + let keys = KeyPair{ + method: 0, + privkey: self.private_key.clone().0, + recipient_pubkey: self.recipient_public_key.clone().into_inner(), + }; + + encrypt(&edit_list_packet, &HashSet::from_iter(vec![keys]))? + .into_iter() + .last() + .ok_or_else(|| Crypt4GHError::EditHeader("could not encrypt header packet".to_string())) + } + + /// Create the edit lists from the unencrypted byte positions. + pub fn create_edit_list(&self) -> Vec { + let mut unencrypted_positions: Vec = self + .unencrypted_positions + .iter() + .flat_map(|pos| [pos.start, pos.end]) + .collect(); + + // Collect the clamped and unencrypted positions into separate edit list groups. + let (mut edit_list, last_discard) = + self + .clamped_positions + .iter() + .fold((vec![], 0), |(mut edit_list, previous_discard), pos| { + // Get the correct number of unencrypted positions that fit within this clamped position. + let partition = + unencrypted_positions.partition_point(|unencrypted_pos| unencrypted_pos <= &pos.end); + let mut positions: Vec = unencrypted_positions.drain(..partition).collect(); + + // Merge all positions. + positions.insert(0, pos.start); + positions.push(pos.end); + + // Find the difference between consecutive positions to get the edits. + let mut positions: Vec = positions + .iter() + .zip(positions.iter().skip(1)) + .map(|(start, end)| end - start) + .collect(); + + // Add the previous discard to the first edit. + if let Some(first) = positions.first_mut() { + *first += previous_discard; + } + + // If the last edit is a discard, then carry this over into the next iteration. + let next_discard = if positions.len() % 2 == 0 { + 0 + } else { + positions.pop().unwrap_or(0) + }; + + // Add edits to the accumulating edit list. + edit_list.extend(positions); + (edit_list, next_discard) + }); + + // If there is a final discard, then add this to the edit list. + if last_discard != 0 { + edit_list.push(last_discard); + } + + edit_list + } + + /// Add edit lists and return a header packet. + pub fn edit_list(self) -> Result, Crypt4GHError> { + if self.reader.edit_list_packet().is_some() { + return Err(Crypt4GHError::InvalidEditList("edit lists already exist".to_string())); + } + + // Todo, header info should have copy or clone on it. + let (mut header_info, encrypted_header_packets) = + if let (Some(header_info), Some(encrypted_header_packets)) = ( + self.reader.header_info(), + self.reader.encrypted_header_packets(), + ) { + ( + Header { + magic_number: header_info.magic_number, + version: header_info.version, + packets_count: header_info.packets_count, + }, + encrypted_header_packets + .iter() + .flat_map(|packet| [packet.packet_length().to_vec(), packet.header.to_vec()].concat()) + .collect::>(), + ) + } else { + return Ok(None); + }; + + // Todo rewrite this from the context of an encryption stream like the decrypter. + header_info.packets_count += 1; + let header_info_bytes = + bincode::serialize(&header_info).map_err(|err| Crypt4GHError::ReadHeaderError(err.to_string()))?; + + let edit_list = self.create_edit_list(); + let edit_list_packet = + make_packet_data_edit_list(edit_list.into_iter().map(|edit| edit as usize).collect()); + + let edit_list_bytes = self.encrypt_edit_list(edit_list_packet)?; + let edit_list_bytes = [ + ((edit_list_bytes.len() + 4) as u32).to_le_bytes().to_vec(), + edit_list_bytes, + ] + .concat(); + + Ok(Some( + (header_info_bytes, encrypted_header_packets, edit_list_bytes).into(), + )) + } +} \ No newline at end of file diff --git a/src/encrypt/builder.rs b/src/encrypt/builder.rs new file mode 100644 index 0000000..a8736cb --- /dev/null +++ b/src/encrypt/builder.rs @@ -0,0 +1,95 @@ +use crate::keys::Keys; +use tokio::io::{AsyncRead, AsyncSeek}; +use tokio_util::codec::FramedRead; + +use crate::decrypt::DecryptStream; +use crate::error::Result; +use crate::PublicKey; + +/// An decrypter reader builder. +#[derive(Debug, Default)] +pub struct Builder { + sender_pubkey: Option, + stream_length: Option, + edit_list: Option>, +} + +impl Builder { + /// Sets the sender public key + pub fn with_sender_pubkey(self, sender_pubkey: PublicKey) -> Self { + self.set_sender_pubkey(Some(sender_pubkey)) + } + + /// Sets the sender public key + pub fn set_sender_pubkey(mut self, sender_pubkey: Option) -> Self { + self.sender_pubkey = sender_pubkey; + self + } + + /// Sets the stream length. + pub fn with_stream_length(self, stream_length: u64) -> Self { + self.set_stream_length(Some(stream_length)) + } + + /// Sets the stream length. + pub fn set_stream_length(mut self, stream_length: Option) -> Self { + self.stream_length = stream_length; + self + } + + /// Set the edit list manually. + pub fn with_edit_list(self, edit_list: Vec) -> Self { + self.set_edit_list(Some(edit_list)) + } + + /// Set the edit list manually. + pub fn set_edit_list(mut self, edit_list: Option>) -> Self { + self.edit_list = edit_list; + self + } + + /// Build the decrypter. + pub fn build(self, inner: R, keys: Vec) -> DecrypterStream + where + R: AsyncRead, + { + DecrypterStream { + inner: FramedRead::new(inner, Default::default()), + header_packet_future: None, + keys, + sender_pubkey: self.sender_pubkey, + session_keys: vec![], + encrypted_header_packets: None, + edit_list_packet: DecrypterStream::<()>::create_internal_edit_list(self.edit_list), + header_info: None, + header_length: None, + current_block_size: None, + stream_length: self.stream_length, + } + } + + /// Build the decrypter and compute the stream length for seek operations. This function will + /// ensure that recompute_stream_length is called at least once on the decrypter stream. + /// + /// This means that data block positions past the end of the stream will be valid and will equal + /// the the length of the stream. Use the build function if this behaviour is not desired. Seeking + /// past the end of the stream without a stream length is allowed but the behaviour is dependent + /// on the underlying reader and data block positions may not be valid. + pub async fn build_with_stream_length( + self, + inner: R, + keys: Vec, + ) -> Result> + where + R: AsyncRead + AsyncSeek + Unpin, + { + let stream_length = self.stream_length; + let mut stream = self.build(inner, keys); + + if stream_length.is_none() { + stream.recompute_stream_length().await?; + } + + Ok(stream) + } +} diff --git a/src/encrypt/data_block.rs b/src/encrypt/data_block.rs new file mode 100644 index 0000000..fa6633e --- /dev/null +++ b/src/encrypt/data_block.rs @@ -0,0 +1,84 @@ +use std::future::Future; +use std::io::Cursor; +use std::pin::Pin; +use std::task::{Context, Poll}; + +use bytes::Bytes; +use crypt4gh::{body_decrypt, WriteInfo}; +use pin_project_lite::pin_project; +use tokio::task::JoinHandle; + +use crate::decrypter::DecrypterStream; +use crate::error::Error::{Crypt4GHError, JoinHandleError}; +use crate::error::Result; +use crate::{DecryptedBytes, DecryptedDataBlock}; + +pin_project! { + #[must_use = "futures do nothing unless you `.await` or poll them"] + pub struct DataBlockDecrypter { + #[pin] + handle: JoinHandle> + } +} + +impl DataBlockDecrypter { + pub fn new( + data_block: Bytes, + session_keys: Vec>, + edit_list_packet: Option>, + ) -> Self { + Self { + handle: tokio::task::spawn_blocking(move || { + DataBlockDecrypter::decrypt(data_block, session_keys, edit_list_packet) + }), + } + } + + pub fn decrypt( + data_block: Bytes, + session_keys: Vec>, + edit_list_packet: Option>, + ) -> Result { + let size = data_block.len(); + + let read_buf = Cursor::new(data_block.to_vec()); + let mut write_buf = Cursor::new(vec![]); + let mut write_info = WriteInfo::new(0, None, &mut write_buf); + + // Todo crypt4gh-rust body_decrypt_parts does not work properly, so just apply edit list here. + body_decrypt(read_buf, session_keys.as_slice(), &mut write_info, 0) + .map_err(|err| Crypt4GHError(err.to_string()))?; + let mut decrypted_bytes: Bytes = write_buf.into_inner().into(); + let mut edited_bytes = Bytes::new(); + + let edits = DecrypterStream::<()>::create_internal_edit_list(edit_list_packet) + .unwrap_or(vec![(false, decrypted_bytes.len() as u64)]); + if edits.iter().map(|(_, edit)| edit).sum::() > decrypted_bytes.len() as u64 { + return Err(Crypt4GHError( + "invalid edit lists for the decrypted data block".to_string(), + )); + } + + edits.into_iter().for_each(|(discarding, edit)| { + if !discarding { + let edit = decrypted_bytes.slice(0..edit as usize); + edited_bytes = [edited_bytes.clone(), edit].concat().into(); + } + + decrypted_bytes = decrypted_bytes.slice(edit as usize..); + }); + + Ok(DecryptedDataBlock::new( + DecryptedBytes::new(edited_bytes), + size, + )) + } +} + +impl Future for DataBlockDecrypter { + type Output = Result; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + self.project().handle.poll(cx).map_err(JoinHandleError)? + } +} \ No newline at end of file diff --git a/src/encrypt/encrypted_data.rs b/src/encrypt/encrypted_data.rs new file mode 100644 index 0000000..c8fb995 --- /dev/null +++ b/src/encrypt/encrypted_data.rs @@ -0,0 +1,20 @@ +/// Implementation of Crypt4GH spec "Encrypted Data" §3.4. + +use crate::keys::EncryptionMethod; + +/// Size of the encrypted segments. +pub const SEGMENT_SIZE: usize = 65_536; +const CIPHER_DIFF: usize = 28; +const CIPHER_SEGMENT_SIZE: usize = SEGMENT_SIZE + CIPHER_DIFF; + + +// §3.4.2 Segmenting the input +struct Segment { + pub data: Chacha20IetfPoly1305Segment +} + +struct Chacha20IetfPoly1305Segment { + nonce: u8, + encrypted_data: Vec, // FIXME: Specific Nonce type preferred in Rust, prefer not following the spec types here + mac: u8 // FIXME: Ditto above +} \ No newline at end of file diff --git a/src/encrypt/header/mod.rs b/src/encrypt/header/mod.rs new file mode 100644 index 0000000..18c5f03 --- /dev/null +++ b/src/encrypt/header/mod.rs @@ -0,0 +1,41 @@ +use std::future::Future; +use std::pin::Pin; +use std::task::{Context, Poll}; + +use tokio::io::AsyncRead; + +use crate::error::Crypt4GHError; +use crate::encrypt::EncryptStream; + +pub mod packets; + +/// A struct which will poll an encrypter stream until the session keys are found. +/// After polling the future, the underlying encrypter stream should have processed +/// the session keys. +#[must_use = "futures do nothing unless you `.await` or poll them"] +pub struct SessionKeysFuture<'a, R> { + handle: &'a mut EncryptStream, +} + +impl<'a, R> SessionKeysFuture<'a, R> { + /// Create the future. + pub fn new(handle: &'a mut EncryptStream) -> Self { + Self { handle } + } + + /// Get the inner handle. + pub fn get_mut(&mut self) -> &mut EncryptStream { + self.handle + } +} + +impl<'a, R> Future for SessionKeysFuture<'a, R> +where + R: AsyncRead + Unpin, +{ + type Output = Result<(), Crypt4GHError>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + self.handle.poll_session_keys_unpin(cx) + } +} diff --git a/src/encrypt/header/packets.rs b/src/encrypt/header/packets.rs new file mode 100644 index 0000000..c677354 --- /dev/null +++ b/src/encrypt/header/packets.rs @@ -0,0 +1,54 @@ +use std::future::Future; +use std::pin::Pin; +use std::task::{Context, Poll}; + +use bytes::Bytes; +use crate::error::Crypt4GHError; +use crate::keys::{KeyPair, PublicKey}; +use pin_project_lite::pin_project; +use tokio::task::{spawn_blocking, JoinHandle}; + +pin_project! { + #[must_use = "futures do nothing unless you `.await` or poll them"] + pub struct HeaderPacketsDecrypt { + #[pin] + handle: JoinHandle> + } +} + +impl HeaderPacketsDecrypt { + pub fn new( + header_packets: Vec, + keys: KeyPair, + sender_pubkey: Option, + ) -> Self { + Self { + handle: spawn_blocking(|| { + HeaderPacketsDecrypt::decrypt(header_packets, keys, sender_pubkey) + }), + } + } + + pub fn decrypt( + header_packets: Vec, + keys: Vec, // FIXME: Not quite right + sender_pubkey: Option, + ) -> Result { + Ok(deconstruct_header_body( + header_packets + .into_iter() + .map(|bytes| bytes.to_vec()) + .collect(), + keys.as_slice(), + &sender_pubkey.map(|pubkey| pubkey.into_inner()), + )?) + } +} + +impl Future for HeaderPacketsDecrypt { + type Output = Result; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + self.project().handle.poll(cx).map_err(Crypt4GHError::JoinHandleError)? + } +} \ No newline at end of file diff --git a/src/encrypt/mod.rs b/src/encrypt/mod.rs new file mode 100644 index 0000000..669be0b --- /dev/null +++ b/src/encrypt/mod.rs @@ -0,0 +1,447 @@ +use std::cmp::min; +use std::future::Future; +use std::io; +use std::io::SeekFrom; +use std::pin::Pin; +use std::task::{Context, Poll}; + +use async_trait::async_trait; +use bytes::Bytes; +use crate::encrypt::header::Header; +use crate::Keys; +use futures::{ready, TryFutureExt}; +use futures::Stream; +use pin_project_lite::pin_project; +use tokio::io::{AsyncRead, AsyncSeek, AsyncSeekExt}; +use tokio_util::codec::FramedRead; + +use crate::advance::Advance; +use crate::decoder::Block; +use crate::decoder::DecodedBlock; +use crate::decrypt::data_block::DataBlockDecrypter; +use crate::decrypt::header::packets::HeaderPacketsDecrypter; +use crate::decrypt::header::SessionKeysFuture; +use crate::error::Crypt4GHError; +use crate::EncryptedHeaderPacketBytes; +use crate::{util, PublicKey}; + +pub mod builder; +pub mod data_block; +pub mod header; +pub mod encrypted_data; + +pin_project! { + /// A decrypter for an entire AsyncRead Crypt4GH file. + pub struct DecrypterStream { + #[pin] + inner: FramedRead, + #[pin] + header_packet_future: Option, + keys: Vec, + sender_pubkey: Option, + encrypted_header_packets: Option>, + header_info: Option
, + session_keys: Vec>, + edit_list_packet: Option>, + header_length: Option, + current_block_size: Option, + stream_length: Option, + } +} + +impl DecrypterStream +where + R: AsyncRead, +{ + /// Partitions the edit list packet so that it applies to the current data block, returning a new + /// edit list that correctly discards and keeps the specified bytes this particular data block. + /// Todo, this should possibly go into the decoder, where bytes can be skipped directly. + pub fn partition_edit_list(mut self: Pin<&mut Self>, data_block: &Bytes) -> Option> { + let this = self.as_mut().project(); + + if let Some(edit_list) = this.edit_list_packet { + let mut new_edit_list = vec![]; + let mut bytes_consumed = 0; + + edit_list.retain_mut(|(discarding, value)| { + // If this is not a discarding edit, then discard 0 at the start. + if !*discarding && new_edit_list.is_empty() { + new_edit_list.push(0); + } + + // Get the encrypted block size. + let data_block_len = data_block.len() as u64 - Block::nonce_size() - Block::mac_size(); + + // Can only consume as many bytes as there are in the data block. + if min(bytes_consumed + *value, data_block_len) == data_block_len { + if bytes_consumed != data_block_len { + // If the whole data block hasn't been consumed yet, an edit still needs to be added. + let last_edit = data_block_len - bytes_consumed; + new_edit_list.push(last_edit); + + // And remove this edit from the next value. + *value -= last_edit; + // Now the whole data block has been consumed. + bytes_consumed = data_block_len; + } + + // Keep all values from now. + true + } else { + // Otherwise, consume the value and remove it from the edit list packet. + bytes_consumed += *value; + new_edit_list.push(*value); + false + } + }); + + (!new_edit_list.is_empty()).then_some(new_edit_list) + } else { + // If there is no edit list to begin with, we just keep the whole block. + None + } + } + + /// Polls a data block. This function shouldn't execute until all the header packets have been + /// processed. + pub fn poll_data_block( + mut self: Pin<&mut Self>, + data_block: Bytes, + ) -> Poll>> { + let edit_list = self.as_mut().partition_edit_list(&data_block); + + let this = self.project(); + Poll::Ready(Some(Ok(DataBlockDecrypter::new( + data_block, + // Todo make this so it doesn't use owned Keys and SenderPublicKey as it will be called asynchronously. + this.session_keys.clone(), + edit_list, + )))) + } + + /// Poll the stream until the header packets and session keys are processed. + pub fn poll_session_keys(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Only execute this function if there are no session keys. + if !self.session_keys.is_empty() { + return Poll::Ready(Ok(())); + } + + // Header packets are waiting to be decrypted. + if let Some(header_packet_decrypter) = self.as_mut().project().header_packet_future.as_pin_mut() + { + return match ready!(header_packet_decrypter.poll(cx)) { + Ok(header_packets) => { + let mut this = self.as_mut().project(); + + // Update the session keys and edit list packets. + this.header_packet_future.set(None); + this.session_keys.extend(header_packets.data_enc_packets); + if this.edit_list_packet.is_none() { + *this.edit_list_packet = + Self::create_internal_edit_list(header_packets.edit_list_packet); + } + + Poll::Ready(Ok(())) + } + Err(err) => Poll::Ready(Err(err)), + }; + } + + // No header packets yet, so more data needs to be decoded. + let mut this = self.as_mut().project(); + match ready!(this.inner.poll_next(cx)) { + Some(Ok(buf)) => match buf { + DecodedBlock::Header(header_info) => { + // Store the header info but otherwise ignore it and poll again. + *this.header_info = Some(header_info); + cx.waker().wake_by_ref(); + Poll::Pending + } + // todo no clones here. + DecodedBlock::HeaderPackets(header_packets) => { + // Update the header length because we have access to the header packets. + let (header_packets, header_length) = header_packets.into_inner(); + *this.encrypted_header_packets = Some(header_packets.clone()); + *this.header_length = Some(header_length + Block::header_info_size()); + + // Add task for decrypting the header packets. + this + .header_packet_future + .set(Some(HeaderPacketsDecrypter::new( + header_packets + .into_iter() + .map(|packet| packet.into_header_bytes()) + .collect(), + this.keys.clone(), + this.sender_pubkey.clone(), + ))); + + // Poll again. + cx.waker().wake_by_ref(); + Poll::Pending + } + DecodedBlock::DataBlock(_) => Poll::Ready(Err(Crypt4GHError::NoKey( + "data block reached without finding session keys".to_string(), + ))), + }, + Some(Err(e)) => Poll::Ready(Err(e)), + None => Poll::Ready(Err(Crypt4GHError::NoKey( + "end of stream reached without finding session keys".to_string(), + ))), + } + } + + /// Convenience for calling [`poll_session_keys`] on [`Unpin`] types. + pub fn poll_session_keys_unpin(&mut self, cx: &mut Context<'_>) -> Poll> + where + Self: Unpin, + { + Pin::new(self).poll_session_keys(cx) + } + + /// Poll the stream until the header has been read. + pub async fn read_header(&mut self) -> Result<(), Crypt4GHError> + where + R: Unpin, + { + SessionKeysFuture::new(self).await + } +} + +impl DecrypterStream { + /// An override for setting the stream length. + pub async fn set_stream_length(&mut self, length: u64) { + self.stream_length = Some(length); + } + + /// Get a reference to the inner reader. + pub fn get_ref(&self) -> &R { + self.inner.get_ref() + } + + /// Get a mutable reference to the inner reader. + pub fn get_mut(&mut self) -> &mut R { + self.inner.get_mut() + } + + /// Get a pinned mutable reference to the inner reader. + pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut R> { + self.project().inner.get_pin_mut() + } + + /// Get the inner reader. + pub fn into_inner(self) -> R { + self.inner.into_inner() + } + + /// Get the length of the header, including the magic string, version number, packet count + /// and the header packets. Returns `None` before the header packet is polled. + pub fn header_size(&self) -> Option { + self.header_length + } + + /// Get the size of the current data block represented by the encrypted block returned by calling + /// poll_next. This will equal `decoder::DATA_BLOCK_SIZE` except for the last block which may be + /// less than that. Returns `None` before the first data block is polled. + pub fn current_block_size(&self) -> Option { + self.current_block_size + } + + /// Clamps the byte position to the nearest data block if the header length is known. This + /// function takes into account the stream length if it is present. + pub fn clamp_position(&self, position: u64) -> Option { + self.header_size().map(|length| { + if position < length { + length + } else { + match self.stream_length { + Some(end_length) if position >= end_length => end_length, + _ => { + let remainder = (position - length) % Block::standard_data_block_size(); + + position - remainder + } + } + } + }) + } + + /// Convert an unencrypted position to an encrypted position if the header length is known. + pub fn to_encrypted(&self, position: u64) -> Option { + self.header_size().map(|length| { + let encrypted_position = util::to_encrypted(position, length); + + match self.stream_length { + Some(end_length) if encrypted_position + Block::mac_size() > end_length => end_length, + _ => encrypted_position, + } + }) + } + + /// Get the session keys. Empty before the header is polled. + pub fn session_keys(&self) -> &[Vec] { + &self.session_keys + } + + /// Get the edit list packet. Empty before the header is polled. + pub fn edit_list_packet(&self) -> Option> { + self + .edit_list_packet + .as_ref() + .map(|packet| packet.iter().map(|(_, edit)| *edit).collect()) + } + + /// Get the header info. + pub fn header_info(&self) -> Option<&Header> { + self.header_info.as_ref() + } + + /// Get the original encrypted header packets, not including the header info. + pub fn encrypted_header_packets(&self) -> Option<&Vec> { + self.encrypted_header_packets.as_ref() + } + + /// Get the stream's keys. + pub fn keys(&self) -> &[Keys] { + self.keys.as_slice() + } + + pub(crate) fn create_internal_edit_list(edit_list: Option>) -> Option> { + edit_list.map(|edits| [true, false].iter().cloned().cycle().zip(edits).collect()) + } +} + +impl DecrypterStream +where + R: AsyncRead + AsyncSeek + Unpin, +{ + /// Recompute the stream length. Having a stream length means that data block positions past the + /// end of the stream will be valid and will equal the the length of the stream. By default this + /// struct contains no stream length when it is initialized. + /// + /// This can take up to 3 seek calls. If the size of the underlying buffer changes, this function + /// should be called again, otherwise data block positions may not be valid. + pub async fn recompute_stream_length(&mut self) -> Result { + let inner = self.inner.get_mut(); + + let position = inner.seek(SeekFrom::Current(0)).await?; + let length = inner.seek(SeekFrom::End(0)).await?; + + if position != length { + inner.seek(SeekFrom::Start(position)).await?; + } + + self.stream_length = Some(length); + + Ok(length) + } +} + +impl Stream for DecrypterStream +where + R: AsyncRead, +{ + type Item = Result; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // When polling, we first need to process enough data to get the session keys. + if let Err(err) = ready!(self.as_mut().poll_session_keys(cx)) { + return Poll::Ready(Some(Err(err))); + } + + let this = self.as_mut().project(); + let item = this.inner.poll_next(cx); + + match ready!(item) { + Some(Ok(buf)) => match buf { + DecodedBlock::Header(_) | DecodedBlock::HeaderPackets(_) => { + // Session keys have already been read, so ignore the header info and header packets + // and poll again + cx.waker().wake_by_ref(); + Poll::Pending + } + DecodedBlock::DataBlock(data_block) => { + // The new size of the data block is available, so update it. + *this.current_block_size = Some(data_block.len()); + + // Session keys have been obtained so process the data blocks. + self.poll_data_block(data_block) + } + }, + Some(Err(e)) => Poll::Ready(Some(Err(e))), + None => Poll::Ready(None), + } + } +} + +impl DecrypterStream +where + R: AsyncRead + AsyncSeek + Unpin + Send, +{ + /// Seek to a position in the encrypted stream. + pub async fn seek_encrypted(&mut self, position: SeekFrom) -> Result { + // Make sure that session keys are polled. + self.read_header().await?; + + // First poll to the position specified. + let seek = self.inner.get_mut().seek(position).await?; + + // Then advance to the correct data block position. + let advance = self.advance_encrypted(seek).await?; + + // Then seek to the correct position. + let seek = self.inner.get_mut().seek(SeekFrom::Start(advance)).await?; + self.inner.read_buffer_mut().clear(); + + Ok(seek) + } + + /// Seek to a position in the unencrypted stream. + pub async fn seek_unencrypted(&mut self, position: u64) -> io::Result { + // Make sure that session keys are polled. + self.read_header().await?; + + // Convert to an encrypted position and seek + let position = self + .to_encrypted(position) + .ok_or_else(|| Crypt4GHError::InvalidPosition("Unable to convert to encrypted position.".to_string()))?; + + // Then do the seek. + self.seek_encrypted(SeekFrom::Start(position)).map_err(Crypt4GHError::IoError(())) + } +} + +#[async_trait] +impl Advance for DecrypterStream +where + R: AsyncRead + Send + Unpin, +{ + async fn advance_encrypted(&mut self, position: u64) -> io::Result { + // Make sure that session keys are polled. + self.read_header().await?; + + // Get the next position. + let data_block_position = self + .clamp_position(position) + .ok_or_else(|| io::Error::new(io::ErrorKind::Other, "could not find data block position"))?; + + Ok(data_block_position) + } + + async fn advance_unencrypted(&mut self, position: u64) -> io::Result { + // Make sure that session keys are polled. + self.read_header().await?; + + // Convert to an encrypted position and seek + let position = self + .to_encrypted(position) + .ok_or_else(|| Crypt4GHError("Unable to convert to encrypted position.".to_string()))?; + + // Then do the advance. + self.advance_encrypted(position).await + } + + fn stream_length(&self) -> Option { + self.stream_length + } +} \ No newline at end of file diff --git a/src/error.rs b/src/error.rs index 9493c06..82dcd3f 100644 --- a/src/error.rs +++ b/src/error.rs @@ -1,9 +1,9 @@ use std::error::Error; -use std::path::PathBuf; -use thiserror::Error; +use thiserror::Error as ThisError; +use tokio::task; -#[derive(Debug, Error)] +#[derive(Debug, ThisError)] pub enum Crypt4GHError { // User errors #[error("No Recipients' Public Key found")] @@ -12,14 +12,13 @@ pub enum Crypt4GHError { InvalidRangeSpan(Option), #[error("The edit list is empty")] EmptyEditList, - // Sodiumoxide errors #[error("Unable to create random nonce")] NoRandomNonce, #[error("Unable to extract nonce")] NoNonce, #[error("Unable to create random salt")] NoRandomSalt, - #[error("Unable to create session key")] + #[error("Unable to find or create session key")] NoKey, #[error("Unable to wrap key")] BadKey, @@ -27,12 +26,14 @@ pub enum Crypt4GHError { // DecryptKeyError(SymmetricCipherError), #[error("Invalid key format")] InvalidKeyFormat, - #[error("Invalid PEM file length. The file ({0:?}) is not 3 lines long")] - InvalidPEMFormatLength(PathBuf), + #[error("Invalid PEM file length.")] + InvalidPEMFormatLength, #[error("Invalid PEM file header or footer: -----BEGIN or -----END")] InvalidPEMHeaderOrFooter, #[error("Invalid SSH key format")] InvalidSSHKey, + #[error("Invalid position: {0:?}")] + InvalidPosition(String), #[error("Unable to wrap nonce")] UnableToWrapNonce, #[error("Could not decrypt block: {0:?}, {1:?}")] @@ -56,7 +57,7 @@ pub enum Crypt4GHError { #[error("Decryption failed -> Invalid data: {0}")] InvalidData(String), - // Keys errors + // Key errors #[error("Unable to extract public server key")] BadServerPublicKey, #[error("Unable to extract private server key")] @@ -91,8 +92,6 @@ pub enum Crypt4GHError { ReadBlockError(Box), #[error("Error reading the remainder of the file (ERROR = {0:?})")] ReadRemainderError(Box), - #[error("Unable to read lines from {0:?} (ERROR = {1:?})")] - ReadLinesError(PathBuf, Box), #[error("Unable to deserialize rounds from private key")] ReadRoundsError, #[error("Unable to extract public key")] @@ -109,10 +108,8 @@ pub enum Crypt4GHError { MagicStringError, #[error("Unsupported CRYPT4GH version (version = {0:?})")] InvalidCrypt4GHVersion(u32), - #[error("Empty public key at {0:?}")] - EmptyPublicKey(PathBuf), - #[error("Secret key not found: {0}")] - ReadSecretKeyFileError(PathBuf), + #[error("Empty public key")] + EmptyPublicKey, // Packets #[error("Unable to read packet encryption method")] @@ -154,53 +151,48 @@ pub enum Crypt4GHError { #[error("Unable to parse the start of the range")] ParseRangeError, - // // Config errors - // #[error("Unable to get environment variable '{0}' (ERROR = {1}) ")] - // NoEnvVar(&'static str, String), - // #[error("Wrong Port")] - // WrongPort, - // #[error("Bad config (ERROR = {0})")] - // BadConfig(String), - - // // Binding errors - // #[error("Unable to bind to the address (ERROR = {0})")] - // BindingError(String), - // #[error("Unable to parse address: {0} (ERROR = {1})")] - // WrongAddress(String, String), - - // // Runtime errors - // #[error("Internal Server Failed (ERROR = {0})")] - // InternalServerError(String), - // #[error("Page not found (ERROR = {0})")] - // NotFound(String), - // #[error("Database Failed (ERROR = {0})")] - // DbError(String), - // #[error("Cache Failed (ERROR = {0})")] - // CacheError(String), - // #[error("Invalid Headers")] - // InvalidHeaders, - - // // Passport errors - // #[error("Unable to construct passport (ERROR = {0})")] - // BadPassport(String), - - // // Authentication errors - // #[error("Unauthorized")] - // Unauthorized, - // #[error("Forbidden")] - // Forbidden, - - // // AMQP - // #[error("Connection url bad format")] - // BadConfigConnectionUrl, - // #[error("AMQP TlsConnector builder failed")] - // TlsConnectorError, - // #[error("AMQP Connection failed")] - // ConnectionError(Option), - // #[error("AMQP Error")] - // AMQPError(#[from] amiquip::Error), - // IO #[error("IO failed")] IoError(#[from] std::io::Error), + #[error("End of stream: {0:?}")] + EndOfStreamReached(String), + + // Conversion and decoding + #[error("converting slice to fixed size array")] + SliceConversionError, + #[error("converting between numeric types")] + NumericConversionError, + #[error("Decoding header info error")] + DecodingHeader, + #[error("Decoding header packet error")] + DecodingHeaderPacket, + #[error("join handle error: `{0}`")] + JoinHandleError(task::JoinError), + #[error("maximum header size exceeded")] + MaximumHeaderSize, + #[error("crypt4gh error: `{0}`")] + Crypt4GHError(String), } + +// impl From for Crypt4GHError { +// fn from(error: io::Error) -> Self { +// Self::IOError(error) +// } +// } + +// impl From for Crypt4GHError { +// fn from(error: dyn std::error::Error) -> Self { +// if let std::error::Error::IOError(error) = error { +// error +// } else { +// Self::new(io::ErrorKind::Other, error) +// } +// } +// } + +// impl From for Crypt4GHError { +// fn from(error: Crypt4GHError) -> Self { +// Self::Crypt4GHError(error.to_string()) +// } +//} + diff --git a/src/header.rs b/src/header.rs index 3191ebc..30130d3 100644 --- a/src/header.rs +++ b/src/header.rs @@ -1,499 +1,679 @@ use std::collections::HashSet; +use std::io::Read; +use bytes::Bytes; use aead::consts::U32; use aead::generic_array::GenericArray; - use chacha20poly1305::aead::Aead; use chacha20poly1305::aead::OsRng; +use chacha20poly1305::Nonce; use chacha20poly1305::{self, aead, ChaCha20Poly1305, KeyInit, AeadCore}; +use crypto_kx::{SecretKey, Keypair}; -//use itertools::Itertools; use serde::{Deserialize, Serialize}; -use crypto_kx::{SecretKey, PublicKey, Keypair}; -use crate::Keys; - -use super::SEGMENT_SIZE; +use crate::decrypt; +use crate::encrypt; +use crate::encrypt::encrypted_data::SEGMENT_SIZE; +use crate::encrypt::header; use crate::error::Crypt4GHError; +use crate::keys; +use crate::keys::EncryptionMethod; +use crate::keys::KeyPair; +use crate::keys::KeyPairInfo; +use crate::keys::PrivateKey; +use crate::keys::PublicKey; +use crate::keys::SessionKeys; + const MAGIC_NUMBER: &[u8; 8] = b"crypt4gh"; const VERSION: u32 = 1; -#[derive(Serialize, Deserialize, PartialEq)] -enum HeaderPacketType { - DataEnc = 0, - EditList = 1, +pub struct Magic([u8; 8]); + +/// Structs below follow crypt4gh spec §2.2 +/// +/// Header precedes data blocks and is described in crypt4gh spec §3.2 and §2.2 for a high level graphical representation of +/// the file structure. +#[derive(Debug)] +pub struct Header { + magic: Magic, + version: u32, + count: u32, + packets: Vec } -struct HeaderPackets { - data_enc_packets: Vec>, - edit_list_packet: Option>, +/// Encodes actual encrypted data from a header packet or an edit list. +#[derive(Debug, Serialize, Deserialize, PartialEq)] +enum HeaderPacketType { + DataEnc, + EditList } -/// Contains the parsed data of the packets -pub struct DecryptedHeaderPackets { - /// The packets that are coded as data - pub data_enc_packets: Vec>, - /// The packets that are an edit list - pub edit_list_packet: Option>, +#[derive(Debug)] +struct DataEncryptionKeyPacket { + encryption_method: u32, + data_encryption_key: Vec } -/// Contains the basic information of the header. -#[derive(Serialize, Deserialize, Debug)] -pub struct HeaderInfo { - /// A “magic” string for file type identification. It should be the ASCII representation of the string "crypt4gh". - pub magic_number: [u8; 8], - /// A version number (four-byte little-endian). The current version is 1. - pub version: u32, - /// The number of packets that the header contains. - pub packets_count: u32, +/// Crypt4gh spec §3.2.4 +/// +/// TODO: Enforce this: +/// +/// It is not permitted to have more than one edit list. If more than one edit list is present, the file SHOULD +/// be rejected. +struct EditListPacket { + number_lengths: u32, + lengths: Vec } -/// Constructs an encrypted data packet -pub fn make_packet_data_enc(encryption_method: usize, session_key: &[u8; 32]) -> Vec { - vec![ - bincode::serialize(&HeaderPacketType::DataEnc).expect("Unable to serialize packet type"), - (encryption_method as u32).to_le_bytes().to_vec(), - session_key.to_vec(), - ] - .concat() +/// Data-bearing Header Packet data type as it can hold either depending on packet type +#[derive(Debug)] +enum HeaderPacketDataType { + EditListPacket(Vec), + DataPacketEncrypted(Vec), } -/// Constructs an edit list packet -pub fn make_packet_data_edit_list(edit_list: Vec) -> Vec { - vec![ - bincode::serialize(&HeaderPacketType::EditList).unwrap(), - (edit_list.len() as u32).to_le_bytes().to_vec(), - edit_list - .into_iter() - .flat_map(|n| (n as u64).to_le_bytes().to_vec()) - .collect(), - ] - .concat() +/// Crypt4gh spec §3.2.1 +/// +/// Conditional settings for writer_public_key/nonce/mac depending on +/// as described in the spec can be selected at runtime +#[derive(Debug)] +pub struct HeaderPacket { + packet_length: u32, + encryption_method: EncryptionMethod, + writer_public_key: PublicKey, + nonce: Nonce, + encrypted_payload: Bytes, + mac: Bytes //dalek::Mac type might be more fitting + // TODO: MAC[16] for chacha20_ietf_poly1305 } -fn encrypt_x25519_chacha20_poly1305( - data: &[u8], - seckey: &[u8], - recipient_pubkey: &[u8], -) -> Result, Crypt4GHError> { - - let server_sk = SecretKey::try_from(&seckey[0..SecretKey::BYTES]).map_err(|_| Crypt4GHError::BadClientPrivateKey)?; - let client_pk = PublicKey::try_from(recipient_pubkey).map_err(|_| Crypt4GHError::BadServerPublicKey)?; - - let pubkey = server_sk.public_key(); - - - log::debug!(" packed data({}): {:02x?}", data.len(), data); - log::debug!(" public key({}): {:02x?}", pubkey.as_ref().len(), pubkey.as_ref()); - log::debug!( - " private key({}): {:02x?}", - seckey[0..32].len(), - &seckey[0..32] - ); - log::debug!( - " recipient public key({}): {:02x?}", - recipient_pubkey.len(), - recipient_pubkey - ); - - // TODO: Make sure this doesn't exceed 2^32 executions, otherwise implement a counter and/or other countermeasures against repeats - let nonce = ChaCha20Poly1305::generate_nonce(OsRng); +/// Crypt4gh spec §3.2.2 +#[derive(Debug)] +pub struct EncryptedHeaderPacket { + packet_type: HeaderPacketType, + data_key: Bytes, // TODO: data_key[32] on the spec + // for chacha20_ietf_poly1305 + data_edit_list: EditListPacket, +} - let keypair = Keypair::from(server_sk); - let server_session_keys = keypair.session_keys_from(&client_pk); - let shared_key = GenericArray::::from_slice(&server_session_keys.rx.as_ref().as_slice()); +/// Crypt4gh spec §3.2.3 +/// +/// TODO: Make clear decision on how to enforce this: +/// +/// To allow parts of the data to be encrypted with different Kdata keys, more than one of this packet type may +/// be present. If there is more than one, the data encryption method MUST be the same for all of them to +/// prevent problems with random access in the encrypted file. +struct DataEncryptionPacket { + encryption_method: EncryptionMethod, + data_key: PrivateKey, +} - log::debug!(" shared key: {:02x?}", shared_key.to_vec()); - let cipher = ChaCha20Poly1305::new(shared_key); +/// A struct which will poll a decrypter stream until the session keys are found. +/// After polling the future, the underlying decrypter stream should have processed +/// the session keys. +#[must_use = "futures do nothing unless you `.await` or poll them"] +pub struct SessionKeysFuture<'a, R> { + handle: &'a mut DecryptStream, +} - let ciphertext = cipher.encrypt(&nonce, data) - .map_err(|err| Crypt4GHError::UnableToEncryptPacket(err.to_string()))?; +impl<'a, R> SessionKeysFuture<'a, R> { + /// Create the future. + pub fn new(handle: &'a mut DecryptStream) -> Self { + Self { handle } + } - Ok(vec![ - pubkey.as_ref(), - nonce.as_slice(), - ciphertext.as_slice() - ].concat()) + /// Get the inner handle. + pub fn get_mut(&mut self) -> &mut DecryptStream { + self.handle + } } -/// Computes the encrypted part, using all keys -/// -/// Given a set of keys and a vector of bytes, it iterates the keys and for every valid key (key.method == 0), it encrypts the packet. -/// It uses chacha20 and poly1305 to encrypt the packet. It returns a set of encrypted segments that represent the packet for every key. -/// -/// * `packet` is a vector of bytes of information to be encrypted -/// * `keys` is a unique collection of keys with `key.method` == 0 -pub fn encrypt(packet: &[u8], keys: &HashSet) -> Result>, Crypt4GHError> { - keys.iter() - .filter(|key| key.method == 0) - .map( - |key| match encrypt_x25519_chacha20_poly1305(packet, &key.privkey, &key.recipient_pubkey) { - Ok(session_key) => Ok(vec![u32::from(key.method).to_le_bytes().to_vec(), session_key].concat()), - Err(e) => Err(e), - }, - ) - .collect() -} +impl<'a, R> Future for SessionKeysFuture<'a, R> +where + R: AsyncRead + Unpin, +{ + type Output = Result<(), Crypt4GHError>; -/// Serializes the header. -/// -/// Returns [ Magic "crypt4gh" + version + packet count + header packets... ] serialized. -pub fn serialize(packets: Vec>) -> Vec { - log::info!("Serializing the header ({} packets)", packets.len()); - vec![ - MAGIC_NUMBER.to_vec(), - (VERSION as u32).to_le_bytes().to_vec(), - (packets.len() as u32).to_le_bytes().to_vec(), - packets - .into_iter() - .flat_map(|packet| vec![((packet.len() + 4) as u32).to_le_bytes().to_vec(), packet].concat()) - .collect::>(), - ] - .concat() + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + self.handle.poll_session_keys_unpin(cx) + } } -fn decrypt( - encrypted_packets: Vec>, - keys: &[Keys], - sender_pubkey: &Option>, -) -> (Vec>, Vec>) { - let mut decrypted_packets = Vec::new(); - let mut ignored_packets = Vec::new(); - - for packet in encrypted_packets { - match decrypt_packet(&packet, keys, sender_pubkey) { - Ok(decrypted_packet) => decrypted_packets.push(decrypted_packet), - Err(e) => { - log::warn!("Ignoring packet because: {}", e); - ignored_packets.push(packet); - }, - } +impl HeaderPacketsDecrypter { + pub fn new( + header_packets: Vec, + keys: Vec, + sender_pubkey: Option, + ) -> Self { + Self { + handle: spawn_blocking(|| { + HeaderPacketsDecrypter::decrypt(header_packets, keys, sender_pubkey) + }), + } + } + + pub fn decrypt( + header_packets: Vec, + keys: Vec, + sender_pubkey: Option, + ) -> Result { + let header = Header::new_from_bytes(header_packets.as_slice()); + + Ok(header.deserialize( + header_packets + .into_iter() + .map(|bytes| bytes.to_vec()) + .collect(), + keys.as_slice(), + &sender_pubkey.map(|pubkey| pubkey.into_inner()) + )) + } + } + + impl Future for HeaderPacketsDecrypter { + type Output = Result; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + self.project().handle.poll(cx).map_err(JoinHandleError)? } + } - (decrypted_packets, ignored_packets) -} +/// Implements all header-related operations described in crypt4gh spec §3.2 and onwards +impl Header { + pub fn new() -> Self { + todo!() + } + + /// Get the header packet bytes + pub fn packets(&self) -> &Vec { + &self.packets + } -fn decrypt_packet(packet: &[u8], keys: &[Keys], sender_pubkey: &Option>) -> Result, Crypt4GHError> { - let packet_encryption_method = - bincode::deserialize::(packet).map_err(|_| Crypt4GHError::ReadPacketEncryptionMethod)?; + /// Get the size of all the packets. + pub fn length(&self) -> u64 { + unimplemented!() + } - log::debug!("Header Packet Encryption Method: {}", packet_encryption_method); + /// Get the inner bytes and size. + pub fn into_inner(self) -> (Vec, u64) { + unimplemented!() + } - for key in keys { - if packet_encryption_method != u32::from(key.method) { - continue; - } + // FIXME: implement default + + /// New header from Bytes + // pub fn from(self, header_bytes: Bytes) { + // unimplemented!(); + // } + + /// Constructs an encrypted data packet + pub fn make_data_enc_packet(encryption_method: usize, session_key: &[u8; 32]) -> Vec { + vec![ + bincode::serialize(&HeaderPacketType::DataEnc).expect("Unable to serialize packet type"), + (encryption_method as u32).to_le_bytes().to_vec(), + session_key.to_vec(), + ] + .concat() + } - match packet_encryption_method { - 0 => { - let plaintext_packet = decrypt_x25519_chacha20_poly1305(&packet[4..], &key.privkey, sender_pubkey); - //log::debug!("Decrypting packet: {:?}\n into plaintext packet: {:?}\n", &packet[8..], &plaintext_packet); - return plaintext_packet; - }, - 1 => unimplemented!("AES-256-GCM support is not implemented"), - n => return Err(Crypt4GHError::BadHeaderEncryptionMethod(n)), - } + /// Constructs an edit list packet + pub fn make_data_edit_list(edit_list: Vec) -> Vec { + vec![ + bincode::serialize(&HeaderPacketType::EditList).unwrap(), + (edit_list.len() as u32).to_le_bytes().to_vec(), + edit_list + .into_iter() + .flat_map(|n| (n as u64).to_le_bytes().to_vec()) + .collect(), + ] + .concat() } - Err(Crypt4GHError::UnableToEncryptPacket("Error encrypting".to_string())) -} -fn decrypt_x25519_chacha20_poly1305( - encrypted_part: &[u8], - privkey: &[u8], - sender_pubkey: &Option>, -) -> Result, Crypt4GHError> { - log::debug!(" secret key: {:02x?}", &privkey[0..32]); + fn encrypt_x25519_chacha20_poly1305( + data: &[u8], + seckey: &[u8], + recipient_pubkey: &[u8], + ) -> Result, Crypt4GHError> { - let peer_pubkey = &encrypted_part[0..32];//PublicKey::BYTES]; - //log::debug!(" peer_pubkey({}): {:02x?}", peer_pubkey.len(), peer_pubkey); + let server_sk = SecretKey::try_from(&seckey[0..SecretKey::BYTES]).map_err(|_| Crypt4GHError::BadClientPrivateKey)?; + let client_pk = PublicKey::try_from(recipient_pubkey).map_err(|_| Crypt4GHError::BadServerPublicKey)?; - if sender_pubkey.is_some() && sender_pubkey.clone().unwrap().as_slice() != peer_pubkey { - return Err(Crypt4GHError::InvalidPeerPubPkey); - } + let pubkey = server_sk.public_key(); - let nonce = GenericArray::from_slice(&encrypted_part[32..44]); - let packet_data = &encrypted_part[44..]; - let client_sk = SecretKey::try_from(&privkey[0..SecretKey::BYTES]).map_err(|_| Crypt4GHError::BadClientPrivateKey)?; - let server_pk = PublicKey::try_from(peer_pubkey).map_err(|_| Crypt4GHError::BadServerPublicKey)?; + log::debug!(" packed data({}): {:02x?}", data.len(), data); + log::debug!(" public key({}): {:02x?}", pubkey.as_ref().len(), pubkey.as_ref()); + log::debug!( + " private key({}): {:02x?}", + seckey[0..32].len(), + &seckey[0..32] + ); + log::debug!( + " recipient public key({}): {:02x?}", + recipient_pubkey.len(), + recipient_pubkey + ); - let keypair = Keypair::from(client_sk); - let client_session_keys = keypair.session_keys_to(&server_pk); - let shared_key = GenericArray::::from_slice(&client_session_keys.tx.as_ref().as_slice()); + // TODO: Make sure this doesn't exceed 2^32 executions, otherwise implement a counter and/or other countermeasures against repeats + let nonce = ChaCha20Poly1305::generate_nonce(OsRng); - let cipher = ChaCha20Poly1305::new(shared_key); + let keypair = Keypair::from(server_sk); + let server_session_keys = keypair.session_keys_from(&client_pk); + let shared_key = GenericArray::::from_slice(&server_session_keys.rx.as_ref().as_slice()); - log::debug!(" peer pubkey: {:02x?}", peer_pubkey); - log::debug!(" nonce: {:02x?}", &nonce); - log::debug!( - " encrypted data ({}): {:02x?}", - packet_data.len(), - packet_data - ); + log::debug!(" shared key: {:02x?}", shared_key.to_vec()); - log::debug!("shared key: {:02x?}", shared_key); + let cipher = ChaCha20Poly1305::new(shared_key); - let plaintext = cipher.decrypt(&nonce, packet_data) - .map_err(|err| Crypt4GHError::UnableToDecryptBlock(packet_data.to_vec(), err.to_string()))?; + let ciphertext = cipher.encrypt(&nonce, data) + .map_err(|err| Crypt4GHError::UnableToEncryptPacket(err.to_string()))?; - Ok(plaintext) -} + Ok(vec![ + pubkey.as_ref(), + nonce.as_slice(), + ciphertext.as_slice() + ].concat()) + } -fn partition_packets(packets: Vec>) -> Result { - let mut enc_packets = Vec::new(); - let mut edits = None; + /// Computes the encrypted part, using all keys + /// + /// Given a set of keys and a vector of bytes, it iterates the keys and for every valid key (key.method == 0), it encrypts the packet. + /// It uses chacha20 and poly1305 to encrypt the packet. It returns a set of encrypted segments that represent the packet for every key. + /// + /// * `packet` is a vector of bytes of information to be encrypted + /// * `keys` is a unique collection of keys with `key.method` == 0 + pub fn encrypt(&self, packet: &[u8], keys: &HashSet) -> Result>, Crypt4GHError> { + keys.iter() + .filter(|key| key.method == 0) + .map( + |key| match Self::encrypt_x25519_chacha20_poly1305(packet, &key.privkey, &key.recipient_pubkey) { + Ok(session_key) => Ok(vec![u32::from(key.method).to_le_bytes().to_vec(), session_key].concat()), + Err(e) => Err(e), + }, + ) + .collect() + } - for packet in packets { - let packet_type = - bincode::deserialize::(&packet[0..4]).map_err(|_| Crypt4GHError::InvalidPacketType)?; + /// Serializes the header. + /// + /// Returns [ Magic "crypt4gh" + version + packet count + header packets... ] serialized. + pub fn serialize(&self, packets: Vec>) -> Vec { + log::info!("Serializing the header ({} packets)", packets.len()); + vec![ + MAGIC_NUMBER.to_vec(), + (VERSION as u32).to_le_bytes().to_vec(), + (packets.len() as u32).to_le_bytes().to_vec(), + packets + .into_iter() + .flat_map(|packet| vec![((packet.len() + 4) as u32).to_le_bytes().to_vec(), packet].concat()) + .collect::>(), + ] + .concat() + } - match packet_type { - HeaderPacketType::DataEnc => { - enc_packets.push(packet[4..].to_vec()); - }, - HeaderPacketType::EditList => { - match edits { - None => edits = Some(packet[4..].to_vec()), - Some(_) => return Err(Crypt4GHError::TooManyEditListPackets), - }; - }, + /// Deserializes the data info from the header bytes. + /// + /// Reads the magic number, the version and the number of packets from the input bytes. + pub fn deserialize(&self, + header: Bytes, + keys: Vec, + sender_pubkey: &Option> + ) -> Result { + let header_info = + bincode::deserialize::
(header.bytes()).map_err(|e| Crypt4GHError::ReadHeaderError(e))?; + + if &header_info.magic != MAGIC_NUMBER { + return Err(Crypt4GHError::MagicStringError); } - } - Ok(HeaderPackets { - data_enc_packets: enc_packets, - edit_list_packet: edits, - }) -} + if header_info.version != VERSION { + return Err(Crypt4GHError::InvalidCrypt4GHVersion(header_info.version)); + } -fn parse_enc_packet(packet: &[u8]) -> Result, Crypt4GHError> { - match packet[0..4] { - [0, 0, 0, 0] => Ok(packet[4..].to_vec()), - _ => Err(Crypt4GHError::UnsupportedEncryptionMethod( - bincode::deserialize::(&packet[0..4]).expect("Unable to deserialize bulk encryption method"), - )), + Ok(header_info) } -} -fn parse_edit_list_packet(packet: &[u8]) -> Result, Crypt4GHError> { - let nb_lengths: u32 = bincode::deserialize::(packet).map_err(|_| Crypt4GHError::NoEditListLength)?; - log::info!("Edit list length: {}", nb_lengths); - log::info!("packet content length: {}", packet.len() - 4); + pub fn decrypt( + &mut self, + encrypted_packets: Vec>, + keys: &[KeyPairInfo], + sender_pubkey: &Option>, + ) -> (Vec>, Vec>) { + let mut decrypted_packets = Vec::new(); + let mut ignored_packets = Vec::new(); + + for packet in encrypted_packets { + match Self::decrypt_packet(&packet, keys, sender_pubkey) { + Ok(decrypted_packet) => decrypted_packets.push(decrypted_packet), + Err(e) => { + log::warn!("Ignoring packet because: {}", e); + ignored_packets.push(packet); + }, + } + } - if ((packet.len() as u32) - 4) < (8 * nb_lengths) { - return Err(Crypt4GHError::InvalidEditList); + (decrypted_packets, ignored_packets) } - (4..nb_lengths * 8) - .step_by(8) - .map(|i| bincode::deserialize::(&packet[i as usize..]).map_err(|_| Crypt4GHError::InvalidEditList)) - .collect() -} + fn decrypt_packet(packet: &[u8], keys: &[KeyPairInfo], sender_pubkey: &Option>) -> Result, Crypt4GHError> { + let packet_encryption_method = + bincode::deserialize::(packet).map_err(|_| Crypt4GHError::ReadPacketEncryptionMethod)?; -/// Gets data packets and edit list packets from the encrypted packets. -/// -/// Decrypts the encrypted packets and partitions the encrypted packets in two groups, -/// the data packets and the edit list packets. Finally, it parses the packets. -pub fn deconstruct_header_body( - encrypted_packets: Vec>, - keys: &[Keys], - sender_pubkey: &Option>, -) -> Result { - let (packets, _) = decrypt(encrypted_packets, keys, sender_pubkey); - - if packets.is_empty() { - return Err(Crypt4GHError::NoSupportedEncryptionMethod); - } + log::debug!("Header Packet Encryption Method: {}", packet_encryption_method); - let HeaderPackets { - data_enc_packets, - edit_list_packet, - } = partition_packets(packets)?; - - let session_keys = data_enc_packets - .into_iter() - .map(|d| parse_enc_packet(&d)) - .collect::, Crypt4GHError>>()?; - - let edit_list = match edit_list_packet { - Some(packet) => Some(parse_edit_list_packet(&packet)?), - None => None, - }; - - Ok(DecryptedHeaderPackets { - data_enc_packets: session_keys, - edit_list_packet: edit_list, - }) -} + for key in keys { + if packet_encryption_method != u32::from(key.method) { + continue; + } -/// Deserializes the data info from the header bytes. -/// -/// Reads the magic number, the version and the number of packets from the bytes. -pub fn deconstruct_header_info( - header_info_file: &[u8; std::mem::size_of::()], -) -> Result { - let header_info = - bincode::deserialize::(header_info_file).map_err(|e| Crypt4GHError::ReadHeaderError(e))?; - - if &header_info.magic_number != MAGIC_NUMBER { - return Err(Crypt4GHError::MagicStringError); + match packet_encryption_method { + 0 => { + let plaintext_packet = Self::decrypt_x25519_chacha20_poly1305(&packet[4..], &key.privkey, sender_pubkey); + //log::debug!("Decrypting packet: {:?}\n into plaintext packet: {:?}\n", &packet[8..], &plaintext_packet); + return plaintext_packet; + }, + 1 => unimplemented!("AES-256-GCM support is not implemented"), + n => return Err(Crypt4GHError::BadHeaderEncryptionMethod(n)), + } + } + Err(Crypt4GHError::UnableToEncryptPacket("Error encrypting".to_string())) } - if header_info.version != VERSION { - return Err(Crypt4GHError::InvalidCrypt4GHVersion(header_info.version)); - } + fn decrypt_x25519_chacha20_poly1305( + encrypted_part: &[u8], + privkey: &[u8], + sender_pubkey: &Option>, + ) -> Result, Crypt4GHError> { + log::debug!(" secret key: {:02x?}", &privkey[0..32]); - Ok(header_info) -} + let peer_pubkey = &encrypted_part[0..32];//PublicKey::BYTES]; + //log::debug!(" peer_pubkey({}): {:02x?}", peer_pubkey.len(), peer_pubkey); + + if sender_pubkey.is_some() && sender_pubkey.clone().unwrap().as_slice() != peer_pubkey { + return Err(Crypt4GHError::InvalidPeerPubPkey); + } + + let nonce = GenericArray::from_slice(&encrypted_part[32..44]); + let packet_data = &encrypted_part[44..]; + + let client_sk = SecretKey::try_from(&privkey[0..SecretKey::BYTES]).map_err(|_| Crypt4GHError::BadClientPrivateKey)?; + let server_pk = PublicKey::try_from(peer_pubkey).map_err(|_| Crypt4GHError::BadServerPublicKey)?; + + let keypair = Keypair::from(client_sk); + let client_session_keys = keypair.session_keys_to(&server_pk); + let shared_key = GenericArray::::from_slice(&client_session_keys.tx.as_ref().as_slice()); -/// Reencrypts the header. -/// -/// Decrypts the header using the `keys` and then, encrypts the content again for every -/// key in `recipient_keys`. If trim is specified, the packets that cannot be decrypted are discarded. -pub fn reencrypt( - header_packets: Vec>, - keys: &[Keys], - recipient_keys: &HashSet, - trim: bool, -) -> Result>, Crypt4GHError> { - log::info!("Reencrypting the header"); - - let (decrypted_packets, mut ignored_packets) = decrypt(header_packets, keys, &None); - - if decrypted_packets.is_empty() { - Err(Crypt4GHError::NoValidHeaderPacket) + let cipher = ChaCha20Poly1305::new(shared_key); + + log::debug!(" peer pubkey: {:02x?}", peer_pubkey); + log::debug!(" nonce: {:02x?}", &nonce); + log::debug!( + " encrypted data ({}): {:02x?}", + packet_data.len(), + packet_data + ); + + log::debug!("shared key: {:02x?}", shared_key); + + let plaintext = cipher.decrypt(&nonce, packet_data) + .map_err(|err| Crypt4GHError::UnableToDecryptBlock(packet_data.to_vec(), err.to_string()))?; + + Ok(plaintext) } - else { - let mut packets: Vec> = decrypted_packets - .into_iter() - .flat_map(|packet| encrypt(&packet, recipient_keys).unwrap()) - .collect(); - if !trim { - packets.append(&mut ignored_packets); + fn partition_packets(packets: Vec>) -> Result, Crypt4GHError> { + let mut enc_packets = Vec::new(); + let mut edits = None; + + for packet in packets { + let packet_type = + bincode::deserialize::(&packet[0..4]).map_err(|_| Crypt4GHError::InvalidPacketType)?; + + match packet_type { + HeaderPacketType::DataEnc => { + enc_packets.push(packet[4..].to_vec()); + }, + HeaderPacketType::EditList => { + match edits { + None => edits = Some(packet[4..].to_vec()), + Some(_) => return Err(Crypt4GHError::TooManyEditListPackets), + }; + }, + } } - Ok(packets) + Ok(HeaderPackets { + data_enc_packets: enc_packets, + edit_list_packet: edits, + }) } -} -/// Gets the packages to rearrange. -/// -/// Rearranges the edit list in accordance to the range. It returns the data packets -/// along with an oracle that decides if the next packet should be kept (starting by the first). -pub fn rearrange<'a>( - header_packets: Vec>, - keys: Vec, - range_start: usize, - range_span: Option, - sender_pubkey: &Option>, -) -> Result<(Vec>, impl Iterator + 'a), Crypt4GHError> { - if range_span <= Some(0) { - //assert!(span > 0, "Span should be greater than 0"); - return Err(Crypt4GHError::InvalidRangeSpan(range_span)); + fn parse_enc_packet(packet: &[u8]) -> Result, Crypt4GHError> { + match packet[0..4] { + [0, 0, 0, 0] => Ok(packet[4..].to_vec()), + _ => Err(Crypt4GHError::UnsupportedEncryptionMethod( + bincode::deserialize::(&packet[0..4]).expect("Unable to deserialize bulk encryption method"), + )), + } } - log::info!("Rearranging the header"); - - log::debug!(" Start coordinate: {}", range_start); - range_span.map_or_else( - || { - log::debug!(" End coordinate: EOF"); - }, - |span| { - log::debug!(" End coordinate: {}", range_start + span); - }, - ); - log::debug!(" Segment size: {}", SEGMENT_SIZE); - - if range_start == 0 && range_span.is_none() { - return Err(Crypt4GHError::Done); - } + fn parse_edit_list_packet(packet: &[u8]) -> Result, Crypt4GHError> { + let nb_lengths: u32 = bincode::deserialize::(packet).map_err(|_| Crypt4GHError::NoEditListLength)?; - let (decrypted_packets, _) = decrypt(header_packets, &keys, sender_pubkey); + log::info!("Edit list length: {}", nb_lengths); + log::info!("packet content length: {}", packet.len() - 4); - if decrypted_packets.is_empty() { - return Err(Crypt4GHError::NoValidHeaderPacket); + if ((packet.len() as u32) - 4) < (8 * nb_lengths) { + return Err(Crypt4GHError::InvalidEditList); + } + + (4..nb_lengths * 8) + .step_by(8) + .map(|i| bincode::deserialize::(&packet[i as usize..]).map_err(|_| Crypt4GHError::InvalidEditList)) + .collect() } - let HeaderPackets { - data_enc_packets, - edit_list_packet, - } = partition_packets(decrypted_packets)?; + /// Gets data packets and edit list packets from the encrypted packets. + /// + /// Decrypts the encrypted packets and partitions the encrypted packets in two groups, + /// the data packets and the edit list packets. Finally, it parses the packets. + pub fn deconstruct_header_body( + encrypted_packets: Vec>, + keys: &[KeyPairInfo], + sender_pubkey: &Option>, + ) -> Result, Crypt4GHError> { + let (packets, _) = decrypt(encrypted_packets, keys, sender_pubkey)?; + + if packets.is_empty() { + return Err(Crypt4GHError::NoSupportedEncryptionMethod); + } - if edit_list_packet.is_some() { - unimplemented!() + let Vec { + data_enc_packets, + edit_list_packet, + } = Self::partition_packets(packets)?; + + let session_keys = data_enc_packets + .into_iter() + .map(|d| Self::parse_enc_packet(&d)) + .collect::, Crypt4GHError>>()?; + + let edit_list = match edit_list_packet { + Some(packet) => Some(Self::parse_edit_list_packet(&packet)?), + None => None, + }; + + Ok(Vec { + data_enc_packets: session_keys, + edit_list_packet: edit_list, + }) } - log::info!("No edit list present: making one"); - let start_segment = range_start / SEGMENT_SIZE; - let start_offset = range_start % SEGMENT_SIZE; - let end_segment = range_span.map(|span| (range_start + span) / SEGMENT_SIZE); - let end_offset = range_span.map(|span| (range_start + span) % SEGMENT_SIZE); + /// Reencrypts the header. + /// + /// Decrypts the header using the `keys` and then, encrypts the content again for every + /// key in `recipient_keys`. If trim is specified, the packets that cannot be decrypted are discarded. + pub fn reencrypt( + header_packets: Vec>, + keys: &[KeyPairInfo], + recipient_keys: &HashSet, + trim: bool, + ) -> Result { + log::info!("Reencrypting the header"); - log::debug!("Start segment: {} | Offset: {}", start_segment, start_offset); - log::debug!("End segment: {:?} | Offset: {:?}", end_segment, end_offset); + let (decrypted_packets, mut ignored_packets) = decrypt(header_packets, keys, &None)?; - let segment_oracle = (0..).map(move |count| { - if count < start_segment { - false + if decrypted_packets.is_empty() { + Err(Crypt4GHError::NoValidHeaderPacket) } else { - match end_segment { - Some(end) => count < end || (count == end && end_offset.unwrap() > 0), - None => true, + let mut packets: Vec> = decrypted_packets + .into_iter() + .flat_map(|packet| encrypt(&packet, recipient_keys).unwrap()) + .collect(); + + if !trim { + packets.append(&mut ignored_packets); } - } - }); - let mut edit_list = vec![start_offset]; - if let Some(span) = range_span { - edit_list.push(span); + Ok(packets) + } } - log::debug!("New edit list: {:?}", edit_list); - let edit_packet = make_packet_data_edit_list(edit_list); + /// Gets the packages to rearrange. + /// + /// Rearranges the edit list in accordance to the range. It returns the data packets + /// along with an oracle that decides if the next packet should be kept (starting by the first). + pub fn rearrange<'a>( + header_packets: Vec>, + keys: Vec, + range_start: usize, + range_span: Option, + sender_pubkey: &Option>, + ) -> Result<(Vec>, impl Iterator + 'a), Crypt4GHError> { + if range_span <= Some(0) { + //assert!(span > 0, "Span should be greater than 0"); + return Err(Crypt4GHError::InvalidRangeSpan(range_span)); + } - log::info!("Reencrypting all packets"); + log::info!("Rearranging the header"); - let mut packets = data_enc_packets - .into_iter() - .map(|packet| vec![bincode::serialize(&HeaderPacketType::DataEnc).unwrap(), packet].concat()) - .collect::>>(); + log::debug!(" Start coordinate: {}", range_start); + range_span.map_or_else( + || { + log::debug!(" End coordinate: EOF"); + }, + |span| { + log::debug!(" End coordinate: {}", range_start + span); + }, + ); + log::debug!(" Segment size: {}", SEGMENT_SIZE); - packets.push(edit_packet); + if range_start == 0 && range_span.is_none() { + return Err(Crypt4GHError::Done); + } - let hash_keys = keys.into_iter().collect::>(); + let (decrypted_packets, _) = decrypt(header_packets, &keys, sender_pubkey)?; - let final_packets = packets - .into_iter() - .map(|packet| encrypt(&packet, &hash_keys).map(|encrypted_packets| encrypted_packets.concat())) - .collect::>, Crypt4GHError>>()?; + if decrypted_packets.is_empty() { + return Err(Crypt4GHError::NoValidHeaderPacket); + } - Ok((final_packets, segment_oracle)) -} + let HeaderPackets { + data_enc_packets, + edit_list_packet, + } = partition_packets(decrypted_packets)?; -#[cfg(test)] -mod tests { + if edit_list_packet.is_some() { + unimplemented!() + } - use super::*; + log::info!("No edit list present: making one"); - #[test] - fn enum_serialization_0() { - assert_eq!( - bincode::serialize(&HeaderPacketType::DataEnc).unwrap(), - 0_u32.to_le_bytes() - ); + let start_segment = range_start / SEGMENT_SIZE; + let start_offset = range_start % SEGMENT_SIZE; + let end_segment = range_span.map(|span| (range_start + span) / SEGMENT_SIZE); + let end_offset = range_span.map(|span| (range_start + span) % SEGMENT_SIZE); + + log::debug!("Start segment: {} | Offset: {}", start_segment, start_offset); + log::debug!("End segment: {:?} | Offset: {:?}", end_segment, end_offset); + + let segment_oracle = (0..).map(move |count| { + if count < start_segment { + false + } + else { + match end_segment { + Some(end) => count < end || (count == end && end_offset.unwrap() > 0), + None => true, + } + } + }); + + let mut edit_list = vec![start_offset]; + if let Some(span) = range_span { + edit_list.push(span); + } + + log::debug!("New edit list: {:?}", edit_list); + let edit_packet = make_packet_data_edit_list(edit_list); + + log::info!("Reencrypting all packets"); + + let mut packets = data_enc_packets + .into_iter() + .map(|packet| vec![bincode::serialize(&HeaderPacketType::DataEnc).unwrap(), packet].concat()) + .collect::>>(); + + packets.push(edit_packet); + + let hash_keys = keys.into_iter().collect::>(); + + let final_packets = packets + .into_iter() + .map(|packet| encrypt(&packet, &hash_keys).map(|encrypted_packets| encrypted_packets.concat())) + .collect::>, Crypt4GHError>>()?; + + Ok((final_packets, segment_oracle)) } - #[test] - fn enum_serialization_1() { - assert_eq!( - bincode::serialize(&HeaderPacketType::EditList).unwrap(), - 1_u32.to_le_bytes() - ); + /// Builds a header with a random session key + /// + /// Returns the encrypted header bytes + pub fn encrypt_header( + recipient_keys: &HashSet, + session_key: SessionKeys, + ) -> Result, Crypt4GHError> { + let encryption_method = 0; + + let session_key_or_new = session_key.map_or_else(|| { + let mut session_key = [0_u8; 32]; + let mut rnd = rand_chacha::ChaCha20Rng::from_entropy(); + + rnd.try_fill_bytes(&mut session_key).map_err(|_| Crypt4GHError::NoRandomNonce)?; // TODO: Custom error for this + + Ok::<_, Crypt4GHError>(session_key) + }, |value| { Ok(value)} )?; + + let header_content = header::make_packet_data_enc(encryption_method, &session_key_or_new); + let header_packets = header::encrypt(&header_content, recipient_keys)?; + let header_bytes = header::serialize(header_packets); + Ok(header_bytes) } } + +impl Default for Header { + fn default() -> Self { + Self { + magic: MAGIC_NUMBER, + version: VERSION, + packet_count: 0, + header_packets: Vec::new(), + } + } +} + diff --git a/src/keys.rs b/src/keys.rs index 29838cd..cf57636 100644 --- a/src/keys.rs +++ b/src/keys.rs @@ -1,714 +1,104 @@ #![warn(missing_docs)] #![warn(rustdoc::missing_doc_code_examples)] -use aes::cipher::{StreamCipher, generic_array::GenericArray}; - -use std::collections::HashMap; -use std::fs::File; -use std::io::{BufRead, BufReader, Cursor, Read, Write, BufWriter}; -use std::path::PathBuf; - -use base64::engine::general_purpose; -use base64::Engine; - -use lazy_static::lazy_static; - -use rand_chacha; -use rand::{SeedableRng, RngCore, Rng}; - -use crypto_kx::{Keypair, SecretKey}; - -use aes::cipher::{KeyInit, KeyIvInit}; -use aes::cipher::consts::U48; -use chacha20poly1305::aead::Aead; -use chacha20poly1305::aead::OsRng; -use chacha20poly1305::{self, ChaCha20Poly1305}; - -use ctr; - -use curve25519_dalek::montgomery::MontgomeryPoint; -use curve25519_dalek::traits::IsIdentity; - -use crate::error::Crypt4GHError; - const C4GH_MAGIC_WORD: &[u8; 7] = b"c4gh-v1"; const SSH_MAGIC_WORD: &[u8; 15] = b"openssh-key-v1\x00"; -lazy_static! { - static ref KDFS: HashMap<&'static str, (usize, u32)> = [ - ("scrypt", (16, 0)), - ("bcrypt", (16, 100)), - ("pbkdf2_hmac_sha256", (16, 100_000)), - ] - .iter() - .copied() - .collect(); -} - -lazy_static! { - static ref CIPHER_INFO: HashMap<&'static str, (u64, u64)> = [ - ("aes128-ctr", (16, 16)), - ("aes192-ctr", (16, 24)), - ("aes256-ctr", (16, 32)), - ("aes128-cbc", (16, 16)), - ("aes192-cbc", (16, 24)), - ("aes256-cbc", (16, 32)), - ("3des-cbc", ( 8, 24)), - //("blowfish-cbc", (8, 16)), - ] - .iter() - .copied() - .collect(); -} - -fn read_lines(filename: &PathBuf) -> Result, Crypt4GHError> -where -{ - let file = File::open(filename)?; - Ok(BufReader::new(file) - .lines() - .filter_map(std::result::Result::ok) - .collect()) -} - -fn load_from_pem(filepath: &PathBuf) -> Result, Crypt4GHError> { - // Read lines - let lines = read_lines(&filepath) - .map_err(|e| Crypt4GHError::ReadLinesError(filepath.to_owned(), Box::new(e)))?; - - // Check format - if lines.len() < 3 { - return Err(Crypt4GHError::InvalidPEMFormatLength(filepath.into())); - } - - if !lines.first().unwrap().starts_with("-----BEGIN ") || - !lines.last().unwrap().starts_with("-----END ") { - return Err(Crypt4GHError::InvalidPEMHeaderOrFooter); - } - - // Decode with base64 - general_purpose::STANDARD.decode(&lines[1..lines.len() - 1].join("")).map_err(move |e| Crypt4GHError::BadBase64Error(e.into())) -} - -fn decode_string_ssh(stream: &mut impl BufRead) -> Result, Crypt4GHError> { - // Get data len - let mut slen = [0_u8; 4]; - stream.read_exact(&mut slen)?; - let len = u32::from_be_bytes(slen); - - // Get data - let mut data = vec![0_u8; len as usize]; - stream.read_exact(data.as_mut_slice())?; - - Ok(data) -} - -fn decode_string_c4gh(stream: &mut impl BufRead) -> Result, Crypt4GHError> { - // Get data len - let mut slen = [0_u8; 2]; - stream.read_exact(&mut slen)?; - let len = u16::from_be_bytes(slen); - - // Get data - let mut data = vec![0_u8; len as usize]; - stream.read_exact(data.as_mut_slice())?; - - Ok(data) -} - -fn derive_key( - alg: &str, - passphrase: &str, - salt: Option>, - rounds: Option, - dklen: usize, -) -> Result, Crypt4GHError> { - let mut output = vec![0_u8; dklen]; - - match alg { - "scrypt" => { - // TODO: Is dklen the right key length always? - let params = scrypt::Params::new(14, 8, 1, dklen).map_err(|_| Crypt4GHError::ScryptParamsError)?; - scrypt::scrypt( - passphrase.as_bytes(), - &salt.unwrap_or_else(|| { - log::warn!("Using default salt = [0_u8; 8]"); - vec![0_u8; 0] - }), - ¶ms, - &mut output, - ).map_err(|_| Crypt4GHError::ScryptParamsError)? - }, - "bcrypt" => { - bcrypt_pbkdf::bcrypt_pbkdf( - passphrase.as_bytes(), - &salt.unwrap_or_else(|| { - log::warn!("Using default salt = [0_u8; 8]"); - vec![0_u8; 0] - }), - rounds.unwrap_or_else(|| { - log::warn!("Using default rounds = 0"); - 0 - }), - &mut output, - ).map_err(|_| Crypt4GHError::BcryptPBKDFError)? - }, - "pbkdf2_hmac_sha256" => unimplemented!(), - unsupported_alg => return Err(Crypt4GHError::UnsupportedKdf(unsupported_alg.into())), - }; - - Ok(output) -} - -fn parse_c4gh_private_key( - mut stream: impl BufRead, - callback: Result, -) -> Result, Crypt4GHError> { - let kdfname = String::from_utf8(decode_string_c4gh(&mut stream)?) - .map_err(|e| Crypt4GHError::UnsupportedKdf(e.to_string()))?; - log::debug!("KDF: {}", kdfname); - - if kdfname != "none" && !KDFS.contains_key(kdfname.as_str()) { - return Err(Crypt4GHError::InvalidCrypt4GHKey); - } - - let mut rounds = None; - let mut salt = None; - let kdfoptions: Vec; - - if kdfname == "none" { - log::debug!("Not Encrypted"); - } - else { - kdfoptions = decode_string_c4gh(&mut stream)?; - rounds = Some(u32::from_be_bytes([ - kdfoptions[0], - kdfoptions[1], - kdfoptions[2], - kdfoptions[3], - ])); - salt = Some(kdfoptions[4..].to_vec()); - log::debug!("Salt: {:02x?}", salt); - log::debug!("Rounds: {}", rounds.unwrap()); - } - - let ciphername = - String::from_utf8(decode_string_c4gh(&mut stream)?).map_err(|e| Crypt4GHError::BadCiphername(e.to_string()))?; - log::debug!("Ciphername: {}", ciphername); - - let private_data = decode_string_c4gh(&mut stream)?; - - log::debug!("Private data: {:?}", &private_data); - - if ciphername == "none" { - return Ok(private_data); - } - - // Else, the data was encrypted - if ciphername != "chacha20_poly1305" { - return Err(Crypt4GHError::BadCiphername(ciphername)); - } - - let passphrase = callback?; - - let shared_key = derive_key(&kdfname, &passphrase, salt, rounds, 32)?; - log::debug!("Shared Key: {:02x?}", shared_key); - log::debug!("Nonce: {:02x?}", &private_data[0..12]); - - let nonce = chacha20poly1305::Nonce::from_slice(&private_data[0..12]); - let key = chacha20poly1305::Key::from_slice(&shared_key); - let encrypted_data = &private_data[12..]; - - log::debug!("Encrypted data: {:?}", &encrypted_data); - - // TODO: Clarify why we are **encrypting** the private key in this function? - let privkey_plain = ChaCha20Poly1305::new(key).encrypt(nonce, encrypted_data) - .map_err(|_| Crypt4GHError::InvalidKeyFormat)?; - - log::debug!(" key argument: {:?}", &key); - log::debug!(" nonce argument: {:?}", &nonce); - log::debug!(" encrypted_data argument: {:?}", &encrypted_data); - - log::debug!("Privkey plaintext: {:?}", privkey_plain); - Ok(privkey_plain) -} - -fn parse_ssh_private_key( - mut stream: impl BufRead, - callback: Result, -) -> Result<([u8; 32], [u8; 32]), Crypt4GHError> { - let ciphername = - String::from_utf8(decode_string_ssh(&mut stream)?).map_err(|e| Crypt4GHError::BadCiphername(e.to_string()))?; - let kdfname = - String::from_utf8(decode_string_ssh(&mut stream)?).map_err(|e| Crypt4GHError::BadKdfName(e.into()))?; - let kdfoptions = decode_string_ssh(&mut stream)?; - - log::debug!("KDF: {}", kdfname); - log::debug!("Ciphername: {}", ciphername); - - let mut salt: Option> = None; - let mut rounds: Option = None; - - match kdfname.as_str() { - "none" => { - log::info!("Not Encrypted"); - }, - "bcrypt" => { - if ciphername.as_str() == "none" { - return Err(Crypt4GHError::InvalidSSHKey); - } - else { - // Get salt - let mut kdfoptions_cursor = Cursor::new(kdfoptions); - salt = Some(decode_string_ssh(&mut kdfoptions_cursor)?); - - // Get rounds - let mut buf = [0_u8; 4]; - kdfoptions_cursor - .read_exact(&mut buf) - .map_err(|_| Crypt4GHError::ReadRoundsError)?; - rounds = Some(u32::from_be_bytes(buf)); - - // Make sure kdfoptions are initialized to other values than 0 - if kdfoptions_cursor.read_exact(&mut [0_u8]).is_ok() { - return Err(Crypt4GHError::BadKey); - } - - // Log - log::debug!("Salt: {:02x?}", salt); - log::debug!("Rounds: {:?}", rounds); - } - }, - _ => return Err(Crypt4GHError::InvalidSSHKey), - } - - // N keys - let mut buf = [0_u8; 4]; - stream.read_exact(&mut buf).map_err(|_| Crypt4GHError::ReadSSHKeys)?; - let n: u32 = u32::from_be_bytes(buf); - log::debug!("Number of keys: {}", n); - - // Apparently always 1: https://github.com/openssh/openssh-portable/blob/master/sshkey.c#L3857 - assert!(n == 1); - - // Ignore public keys - decode_string_ssh(&mut stream)?; - - // Padded list of private keys - let private_ciphertext = decode_string_ssh(&mut stream)?; - - // There should be no more data to read - assert!( - stream.read_exact(&mut [0_u8; 1]).is_err(), - "There should be no trailing data" - ); - - if ciphername == "none" { - // No need to unpad - get_skpk_from_decrypted_private_blob(&private_ciphertext) - } - else { - // Encrypted - assert!(salt.is_some() && rounds.is_some()); - - let passphrase = callback.map_err(|e| Crypt4GHError::NoPassphrase(e.into()))?; // TODO: Just check for passphrase being null since callback is gone? - - let dklen = get_derived_key_length(&ciphername)?; - log::debug!("Derived Key len: {}", dklen); - - let derived_key = derive_key(&kdfname, &passphrase, salt, rounds, dklen)?; - log::debug!("Derived Key: {:02x?}", derived_key); - - let private_data = decipher(&ciphername, &derived_key, &private_ciphertext)?; - get_skpk_from_decrypted_private_blob(&private_data) - } -} - -fn decipher(ciphername: &str, data: &[u8], private_ciphertext: &[u8]) -> Result, Crypt4GHError> { - let (ivlen, keylen) = CIPHER_INFO - .get(ciphername) - .ok_or_else(|| Crypt4GHError::BadCiphername(ciphername.into()))?; - - log::debug!("IV length and Key length: {} {}", ivlen, keylen); - log::debug!("Private ciphertext length and target ciphername block size: {} {}", private_ciphertext.len(), block_size(ciphername)?); - - if ((ivlen + keylen) as usize) != data.len() { - return Err(Crypt4GHError::InvalidData(String::from("IV length and Key length should match total data length"))); - } - - if (private_ciphertext.len() % block_size(ciphername)?) != 0 { - return Err(Crypt4GHError::InvalidData(String::from("Ciphertext does not match target cipher block size"))); - } - - // Get params - let key = &data[..*keylen as usize]; - let iv = &data[*keylen as usize..]; - let iv_ga = GenericArray::from_slice(iv); - - log::debug!("Decryption Key ({}): {:02x?}", key.len(), key); - log::debug!("IV ({}): {:02x?}", iv.len(), iv); - - let mut reader: Vec = vec![]; - let output = vec![0_u8; private_ciphertext.len()]; - - BufReader::new(private_ciphertext).read_to_end(&mut reader)?; - let mut writer = BufWriter::new(output); - - // log::debug!("Input ciphername is: {}", ciphername); - // log::debug!("Private ciphertext is: {:#?}", private_ciphertext); - - // Decipher - match ciphername { - "aes128-ctr" => { - type Aes128Ctr = ctr::Ctr128LE; - let mut cipher = Aes128Ctr::new(key.into(), iv_ga); - cipher.apply_keystream_b2b(&reader, writer.get_mut()).map_err(|_| Crypt4GHError::BadCiphername(String::from("aes128-ctr")))? - }, - "aes192-ctr" => { - type Aes192Ctr = ctr::Ctr128LE; - let mut cipher = Aes192Ctr::new(key.into(), iv_ga); - cipher.apply_keystream_b2b(&reader, writer.get_mut()).map_err(|_| Crypt4GHError::BadCiphername(String::from("aes192-ctr")))? - }, - "aes256-ctr" => { - type Aes256Ctr = ctr::Ctr128LE; - let mut cipher = Aes256Ctr::new(key.into(), iv_ga); - log::debug!("Reading reader: {:#?}", &reader); - cipher.apply_keystream_b2b(&reader, &mut writer.get_mut()).map_err(|_| Crypt4GHError::BadCiphername(String::from("aes256-ctr")))? - }, - "aes128-cbc" => { - todo!(); - }, - "aes192-cbc" => { - todo!(); - }, - "aes256-cbc" => { - todo!(); - }, - "3des-cbc" => unimplemented!(), - unknown_cipher => return Err(Crypt4GHError::BadCiphername(unknown_cipher.into())), - } - - writer.into_inner().map_err(|err| Crypt4GHError::IoError(err.into_error())) -} - -fn block_size(ciphername: &str) -> Result { - let (block_sz, _) = CIPHER_INFO - .get(ciphername) - .ok_or_else(|| Crypt4GHError::BadCiphername(ciphername.into()))?; - Ok(*block_sz as usize) -} - -fn get_derived_key_length(ciphername: &str) -> Result { - let (ivlen, keylen) = CIPHER_INFO - .get(ciphername) - .ok_or_else(|| Crypt4GHError::BadCiphername(ciphername.into()))?; - Ok((ivlen + keylen) as usize) -} - -fn get_skpk_from_decrypted_private_blob(blob: &[u8]) -> Result<([u8; 32], [u8; 32]), Crypt4GHError> { - let check_number_1: u32 = bincode::deserialize(&blob[0..4]).map_err(|_| Crypt4GHError::ReadCheckNumber1Error)?; - let check_number_2: u32 = bincode::deserialize(&blob[4..8]).map_err(|_| Crypt4GHError::ReadCheckNumber2Error)?; - assert!( - check_number_1 == check_number_2, - "Check numbers: {} != {}", - check_number_1, - check_number_2 - ); - - let mut stream = Cursor::new(&blob[8..]); - - // We should parse n keys, but n is 1 - decode_string_ssh(&mut stream)?; // ignore key name - decode_string_ssh(&mut stream)?; // ignore pubkey - - let skpk = decode_string_ssh(&mut stream)?; - log::debug!("Private Key blob: {:02x?}", skpk.iter()); - assert!(skpk.len() == 64, "The length of the private key blob must be 64"); - - let (sk, pk) = skpk.split_at(32); - log::debug!("ed25519 sk: {:02x?}", sk.iter()); - log::debug!("ed25519 pk: {:02x?}", pk.iter()); - - let seckey = convert_ed25519_sk_to_curve25519(sk)?; - log::debug!("x25519 sk: {:02x?}", seckey.iter()); - - let pubkey = convert_ed25519_pk_to_curve25519(pk)?; - log::debug!("x25519 pk: {:02x?}", pubkey.iter()); - - Ok((seckey, pubkey)) -} - -/// Reads and decodes the private key stored in `key_path`. -/// -/// It supports `Crypt4GH` and OpenSSH private keys. Fails if it can not read the file -/// or if the key is not one of the two supported formats. Returns the decode key. -/// If the key is encrypted, passphrase should return the passphrase of the key. -pub fn get_private_key( - key_path: PathBuf, - passphrase: Result, -) -> Result, Crypt4GHError> { - let data = load_from_pem(&key_path)?; - - if data.starts_with(C4GH_MAGIC_WORD) { - log::info!("Loading a Crypt4GH private key"); - let mut stream = BufReader::new(data.as_slice()); - stream - .read_exact(&mut [0_u8; C4GH_MAGIC_WORD.len()]) - .map_err(|e| Crypt4GHError::ReadMagicWord(e.into()))?; - parse_c4gh_private_key(stream, passphrase) - } - else if data.starts_with(SSH_MAGIC_WORD) { - log::info!("Loading an OpenSSH private key"); - let mut stream = BufReader::new(data.as_slice()); - stream - .read_exact(&mut [0_u8; SSH_MAGIC_WORD.len()]) - .map_err(|e| Crypt4GHError::ReadMagicWord(e.into()))?; - let (seckey, pubkey) = parse_ssh_private_key(stream, passphrase)?; - Ok(vec![seckey, pubkey].concat()) - } - else { - Err(Crypt4GHError::InvalidKeyFormat) - } -} - -/// Reads and decodes the public key stored in `key_path`. -/// -/// It supports `Crypt4GH` and OpenSSH public keys. Fails if it can not read the file -/// or if the key is not one of the two supported formats. Returns the decoded key. -pub fn get_public_key(key_path: PathBuf) -> Result, Crypt4GHError> { - // Read lines from public key file - match read_lines(&key_path) { - Ok(lines_vec) => { - // Empty key - if lines_vec.is_empty() { - Err(Crypt4GHError::EmptyPublicKey(key_path.into())) - } - // CRYPT4GH key - else if lines_vec[0].contains("CRYPT4GH") { - log::info!("Loading a Crypt4GH public key"); - general_purpose::STANDARD.decode(&lines_vec[1]).map_err(|e| Crypt4GHError::BadBase64Error(e.into())) - } - // SSH key - else if lines_vec[0].len() >= 4 && lines_vec[0].get(0..4).unwrap() == "ssh-" { - log::info!("Loading an OpenSSH public key"); - Ok(ssh_get_public_key(&lines_vec[0])?.to_vec()) - } - // Unsupported key - else { - Err(Crypt4GHError::InvalidKeyFormat) - } - }, - Err(_) => { - // Could not read lines - Err(Crypt4GHError::ReadPublicKeyError) - }, - } -} - -fn ssh_get_public_key(line: &str) -> Result<[u8; 32], Crypt4GHError> { - if &line[4..11] != "ed25519" { - return Err(Crypt4GHError::InvalidSSHKey); - } - - let pkey = general_purpose::STANDARD.decode( - line[12..] - .split(' ') - .take(1) - .next() - .ok_or(Crypt4GHError::InvalidSSHKey)?, - ) - .map_err(|e| Crypt4GHError::BadBase64Error(e.into()))?; - let mut pkey_stream = Cursor::new(pkey); - - let key_type = decode_string_ssh(&mut pkey_stream)?; - assert!(key_type == b"ssh-ed25519", "Unsupported public key type"); - - let pubkey_bytes = decode_string_ssh(&mut pkey_stream)?; - convert_ed25519_pk_to_curve25519(&pubkey_bytes) -} - -// TODO: Move all this SSH-key parsing related logic to a higher abstraction crate that does precisely that. -// Alternatively, use: ed25519_to_curve25519::ed25519_sk_to_curve25519(ed25519_sk) from ed25519_to_curve25519 crate -fn convert_ed25519_pk_to_curve25519(ed25519_pk: &[u8]) -> Result<[u8; 32], Crypt4GHError> { - if ed25519_pk.len() != 32 { - return Err(Crypt4GHError::ConversionFailed); - } - - let mut curve_pk = [0_u8; 32]; - - // let mut montgomery_point = MontgomeryPoint(CompressedEdwardsY::identity()); - let mut montgomery_point = MontgomeryPoint(curve_pk); // TODO: Fix this nonsense :point_up: - montgomery_point.0.copy_from_slice(ed25519_pk); - - // Ensure the given point is not the identity point - if montgomery_point.is_identity() { - return Err(Crypt4GHError::ConversionFailed); - } - - curve_pk.copy_from_slice(&montgomery_point.to_bytes()); - - Ok(curve_pk) -} - -fn convert_ed25519_sk_to_curve25519(ed25519_sk: &[u8]) -> Result<[u8; 32], Crypt4GHError> { - if ed25519_sk.len() != 32 { - return Err(Crypt4GHError::ConversionFailed); - } - - let mut curve_sk = [0_u8; 32]; - - // let mut montgomery_point = MontgomeryPoint(CompressedEdwardsY::identity()); - let mut montgomery_point = MontgomeryPoint(curve_sk); // TODO: Fix this nonsense :point_up: - montgomery_point.0.copy_from_slice(ed25519_sk); - - // Ensure the given point is not the identity point - if montgomery_point.is_identity() { - return Err(Crypt4GHError::ConversionFailed); - } - - curve_sk.copy_from_slice(&montgomery_point.to_bytes()); - - Ok(curve_sk) -} - -/// Generates a random privary key. -/// -/// It generates 32 random bytes and calculates the public key using the curve25519 algorithm. -/// The resulting private key has a length of 64. The first 32 bytes belong to the secret key, -/// the last 32 bytes belong to the public key. -pub fn generate_private_key() -> Result, Crypt4GHError> { - let seckey = ChaCha20Poly1305::generate_key(OsRng).to_vec(); - let pubkey = get_public_key_from_private_key(&seckey)?; - assert_eq!(seckey.len(), pubkey.len()); - log::debug!("Secret key in generate_private_key(): {:#?}", &seckey); - Ok(vec![seckey, pubkey].concat()) -} - -/// Generates a pair of `Crypt4GH` keys. -/// -/// It creates two files, one for the public key and another for the private key. It stores the -/// keys following the [`Crypt4GH` format](https://ega-archive.github.io/crypt4gh-rust/3_key_format.html). -/// The passphrase callback should return a string that will be used to encode the keys. You can add -/// an optional comment at the end of the keys. -pub fn generate_keys( - seckey: PathBuf, - pubkey: PathBuf, - passphrase: Result, - comment: Option, -) -> Result<(), Crypt4GHError> { - let skpk = generate_private_key()?; - log::debug!("Private Key: {:02x?}", skpk); - - // Public key permissions (read & write) - let mut pk_file = File::create(pubkey).expect("Unable to create public key file"); - let mut permissions = pk_file.metadata().unwrap().permissions(); - permissions.set_readonly(false); - pk_file.set_permissions(permissions).unwrap(); - - // Write public key - let (sk, pk) = skpk.split_at(32); - log::debug!("Public Key: {:02x?}", pk); - pk_file.write_all(b"-----BEGIN CRYPT4GH PUBLIC KEY-----\n").unwrap(); - pk_file.write_all(general_purpose::STANDARD.encode(pk).as_bytes()).unwrap(); - pk_file.write_all(b"\n-----END CRYPT4GH PUBLIC KEY-----\n").unwrap(); - - // Secret key file open - let mut sk_file = File::create(seckey).unwrap(); - - // Write secret key - let sk_encrypted = encode_private_key(sk, &passphrase?, comment)?; - log::debug!( - "Encoded Private Key ({}): {:02x?}", - sk_encrypted.len(), - sk - ); - sk_file.write_all(b"-----BEGIN CRYPT4GH PRIVATE KEY-----\n").unwrap(); - sk_file.write_all(general_purpose::STANDARD.encode(sk_encrypted).as_bytes()).unwrap(); - sk_file.write_all(b"\n-----END CRYPT4GH PRIVATE KEY-----\n").unwrap(); - - // Secret key file permissions (read only) - let mut permissions = sk_file.metadata().unwrap().permissions(); - permissions.set_readonly(true); - sk_file.set_permissions(permissions).unwrap(); - - Ok(()) -} - -fn encode_string_c4gh(s: Option<&[u8]>) -> Vec { - let string = s.unwrap_or(b"none"); - vec![(string.len() as u16).to_be_bytes().to_vec(), string.to_vec()].concat() -} - -fn encode_private_key(skpk: &[u8], passphrase: &str, comment: Option) -> Result, Crypt4GHError> { - Ok(if passphrase.is_empty() { - log::warn!("The private key is not encrypted"); - vec![ - C4GH_MAGIC_WORD.to_vec(), - encode_string_c4gh(None), // KDF = None - encode_string_c4gh(None), // Cipher = None - encode_string_c4gh(Some(skpk)), - match comment { - Some(c) => encode_string_c4gh(Some(c.as_bytes())), - None => [].to_vec(), - }, - ] - .concat() - } - else { - let kdfname = "scrypt"; - let (salt_size, rounds) = get_kdf(kdfname)?; - - let mut rnd = rand_chacha::ChaCha20Rng::from_entropy(); - let mut salt = vec![0; salt_size]; - - rnd.try_fill_bytes(&mut salt).map_err(|_| Crypt4GHError::NoRandomNonce)?; - - let mut nonce_bytes = [0u8; 12]; - rnd.fill(&mut nonce_bytes); - let nonce_array = GenericArray::from_slice(&nonce_bytes); - - let derived_key = derive_key(kdfname, passphrase, Some(salt.clone().to_vec()), Some(rounds), 32)?; - // let nonce = ChaCha20Poly1305::generate_nonce(OsRng); - let key = chacha20poly1305::Key::from_slice(&derived_key); - - let encrypted_key = ChaCha20Poly1305::new(&key) - .encrypt(&nonce_array, skpk) - .map_err(|_| Crypt4GHError::BadKey)?; - - let encrypted_key_ga = GenericArray::::from_slice(encrypted_key.as_slice()); - - log::debug!("Derived Key: {:02x?}", derived_key); - log::debug!("Salt: {:02x?}", salt); - // log::debug!("Nonce: {:02x?}", nonce); - - vec![ - C4GH_MAGIC_WORD.to_vec(), - encode_string_c4gh(Some(kdfname.as_bytes())), - encode_string_c4gh(Some(&vec![(rounds as u32).to_be_bytes().to_vec(), salt.to_vec()].concat())), - encode_string_c4gh(Some(b"chacha20_poly1305")), - encode_string_c4gh(Some(&vec![nonce_array.to_vec(), encrypted_key_ga.to_vec()].concat())), - match comment { - Some(c) => encode_string_c4gh(Some(c.as_bytes())), - None => [].to_vec(), - }, - ] - .concat() - }) -} - -fn get_kdf(kdfname: &str) -> Result<(usize, u32), Crypt4GHError> { - KDFS.get(kdfname) - .copied() - .ok_or_else(|| Crypt4GHError::UnsupportedKdf(kdfname.into())) -} +use crate::error::Crypt4GHError; -/// Gets the public key from a private key -/// -/// Computes the curve25519 `scalarmult_base` to the first 32 bytes of `sk`. -/// `sk` must be at least 32 bytes. -pub fn get_public_key_from_private_key(sk: &[u8]) -> Result, Crypt4GHError> { - let secret_key = SecretKey::try_from(sk).map_err(|_| Crypt4GHError::BadServerPrivateKey)?; - let keypair = Keypair::from(secret_key); - let public_key = keypair.public(); - Ok(public_key.as_ref().to_vec()) +#[derive(Debug, PartialEq, Eq, Hash, Clone)] +pub enum EncryptionMethod { // TODO: Spec says u32 for this enum, how to encode? + X25519Chacha20Poly305, + Aes256Gcm +} + +#[derive(Debug, PartialEq, Eq, Hash, Clone)] +/// Key information. +pub struct KeyPair { + /// Method used for the key encryption. + /// > Only method 0 is supported. + pub method: EncryptionMethod, + /// Secret key of the encryptor / decryptor (your key). + pub private_key: PrivateKey, + /// Public key of the recipient (the key you want to encrypt for). + pub public_key: PublicKey, +} + +pub struct SessionKeys { + pub inner: Vec> +} + +/// Private keys are just bytes since it should support disparate formats, i.e: SSH and GA4GH +#[derive(Debug, Clone, PartialEq, Hash, Eq)] +pub struct PrivateKey { + pub bytes: Vec, +} + +/// A wrapper around a vec of bytes that represent a public key. +#[derive(Debug, Clone, PartialEq, Hash, Eq)] +pub struct PublicKey { + pub bytes: Vec, +} + + +impl KeyPair { + /// Create a new key pair. + pub fn new(method: EncryptionMethod, private_key: PrivateKey, public_key: PublicKey) -> Self { + Self { + method, + private_key, + public_key, + } + } + + /// Get the inner keys. + pub fn into_inner(self) -> (PrivateKey, PublicKey) { + (self.private_key, self.public_key) + } + + /// Get private key. + pub fn private_key(&self) -> &PrivateKey { + &self.private_key + } + + /// Get private key + pub fn public_key(&self) -> &PublicKey { + &self.public_key + } +} + +impl PublicKey { + /// Generate a new sender public key. + pub fn new() -> Self { + unimplemented!() + //Self { OsRng:: } + } + + /// Create a new sender public key from bytes. + pub fn new_from_bytes(bytes: Vec) -> Self { + Self { bytes } + } + + /// Get the inner bytes. + pub fn into_inner(self) -> Vec { + self.bytes + } + + /// Get the inner bytes as a reference. + pub fn get_ref(&self) -> &[u8] { + self.bytes.as_slice() + } +} + +/// Generate a private and public key pair. +pub fn generate_key_pair() -> Result { + let method = EncryptionMethod::X25519Chacha20Poly305(); + let private_key = PrivateKey::new(); + let public_key = PublicKey::new(); + + Ok(KeyPair::new( + method, + private_key, + public_key + )) } \ No newline at end of file diff --git a/src/lib.rs b/src/lib.rs index 5d5adfb..02ee6d0 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -21,34 +21,34 @@ clippy::redundant_else )] -use rand::{SeedableRng, RngCore, Rng}; -use rand_chacha; +pub mod decrypt; +pub mod encrypt; +pub mod edit_lists; +pub mod util; +pub mod header; +pub mod keys; +pub mod error; + +use bytes::Bytes; +use crate::decrypt::DecryptStream; +use io::Cursor; +use keys::SessionKeys; use std::collections::HashSet; use std::io::{self, Read, Write}; -use header::DecryptedHeaderPackets; - use chacha20poly1305::aead::Aead; use chacha20poly1305::{ self, ChaCha20Poly1305, Key, KeyInit, Nonce }; use crate::error::Crypt4GHError; +use crate::header::Header; -/// Generate and parse a `Crypt4GH` header. -pub mod header; - -/// Utility to read Crypt4GH-formatted keys. -pub mod keys; - -/// `Crypt4GH` Errors. -pub mod error; +use crate::decrypt::data_block::{ DecryptedDataBlock, DecryptedBytes }; +use crate::keys::KeyPair; +//use header::{ Header, deserialize_header_info }; const CHUNK_SIZE: usize = 4096; -/// Size of the encrypted segments. -pub const SEGMENT_SIZE: usize = 65_536; -const CIPHER_DIFF: usize = 28; -const CIPHER_SEGMENT_SIZE: usize = SEGMENT_SIZE + CIPHER_DIFF; /// Write buffer wrapper. /// * offset: Start writing on position = `offset` @@ -88,164 +88,123 @@ impl<'a, W: Write> WriteInfo<'a, W> { } } -#[derive(Debug, PartialEq, Eq, Hash, Clone)] -/// Key information. -pub struct Keys { - /// Method used for the key encryption. - /// > Only method 0 is supported. - pub method: u8, - /// Secret key of the encryptor / decryptor (your key). - pub privkey: Vec, - /// Public key of the recipient (the key you want to encrypt for). - pub recipient_pubkey: Vec, -} +// pub fn encrypt( +// data_block: Bytes, +// recipient_keys: &HashSet, +// range_start: usize, +// range_span: Option, +// ) -> Result { +// if recipient_keys.is_empty() { +// return Err(Crypt4GHError::NoRecipients); +// } -/// Reads from the `read_buffer` and writes the encrypted data to `write_buffer`. -/// -/// Reads from the `read_buffer` and writes the encrypted data (for every `recipient_key`) to `write_buffer`. -/// If the range is specified, it will only encrypt the bytes from `range_start` to `range_start` + `range_span`. -/// In case that `range_span` is none, it will encrypt from `range_start` to the end of the input. -pub fn encrypt( - recipient_keys: &HashSet, - read_buffer: &mut R, - write_buffer: &mut W, - range_start: usize, - range_span: Option, -) -> Result<(), Crypt4GHError> { - if recipient_keys.is_empty() { - return Err(Crypt4GHError::NoRecipients); - } +// log::info!("Encrypting the file"); +// log::debug!(" Start Coordinate: {}", range_start); - log::info!("Encrypting the file"); - log::debug!(" Start Coordinate: {}", range_start); +// // Seek +// if range_start > 0 { +// log::info!("Forwarding to position: {}", range_start); +// } - // Seek - if range_start > 0 { - log::info!("Forwarding to position: {}", range_start); - } - - read_buffer - .by_ref() - .take(range_start as u64) - .read_to_end(&mut Vec::new()) - .map_err(|e| Crypt4GHError::NotEnoughInput(range_start, e.into()))?; +// // read_buffer +// // .by_ref() +// // .take(range_start as u64) +// // .read_to_end(&mut Vec::new()) +// // .map_err(|e| Crypt4GHError::NotEnoughInput(range_start, e.into()))?; - log::debug!(" Span: {:?}", range_span); +// log::debug!(" Span: {:?}", range_span); - log::info!("Creating Crypt4GH header"); +// log::info!("Creating Crypt4GH header"); - let mut session_key = [0_u8; 32]; - let mut rnd = rand_chacha::ChaCha20Rng::from_entropy(); +// let mut session_key = [0_u8; 32]; +// let mut rnd = rand_chacha::ChaCha20Rng::from_entropy(); - // random bytes into session_key - rnd.try_fill_bytes(&mut session_key).map_err(|_| Crypt4GHError::NoRandomNonce)?; - - let header_bytes = encrypt_header(recipient_keys, &Some(session_key))?; - - log::debug!("header length: {}", header_bytes.len()); - - write_buffer.write_all(&header_bytes)?; - - log::info!("Streaming content"); - - let mut segment = [0_u8; SEGMENT_SIZE]; - - let mut rnd = rand_chacha::ChaCha20Rng::from_entropy(); - let mut nonce_bytes = [0u8; 12]; - rnd.fill(&mut nonce_bytes); - - // The whole file - match range_span { - None | Some(0) => loop { - let segment_len = read_buffer.read(&mut segment)?; - if segment_len == 0 { - break; - } - else if segment_len < SEGMENT_SIZE { - let (data, _) = segment.split_at(segment_len); - let nonce = Nonce::from_slice(&nonce_bytes); - //.map_err(|_| Crypt4GHError::NoRandomNonce)?; - let key = Key::from_slice(&session_key); - //.ok_or(Crypt4GHError::NoKey)?; - let encrypted_data = encrypt_segment(data, *nonce, &key)?; - write_buffer.write_all(&encrypted_data)?; - break; - } - else { - let nonce = Nonce::from_slice(&nonce_bytes); - //.ok_or(Crypt4GHError::NoRandomNonce)?; - let key = Key::from_slice(&session_key);//.ok_or(Crypt4GHError::NoKey)?; - let encrypted_data = encrypt_segment(&segment, *nonce, &key)?; - write_buffer.write_all(&encrypted_data)?; - } - }, - Some(mut remaining_length) => { - while remaining_length > 0 { - let segment_len = read_buffer.read(&mut segment)?; - - // Stop - if segment_len >= remaining_length { - let (data, _) = segment.split_at(remaining_length); - let nonce = Nonce::from_slice(&nonce_bytes); - //.ok_or(Crypt4GHError::NoRandomNonce)?; - let key = Key::from_slice(&session_key); - //.ok_or(Crypt4GHError::NoKey)?; - let encrypted_data = encrypt_segment(data, *nonce, &key)?; - write_buffer.write_all(&encrypted_data)?; - break; - } - - // Not a full segment - if segment_len < SEGMENT_SIZE { - let (data, _) = segment.split_at(segment_len); - let nonce = Nonce::from_slice(&nonce_bytes); - //.ok_or(Crypt4GHError::NoRandomNonce)?; - let key = Key::from_slice(&session_key); - //.ok_or(Crypt4GHError::NoKey)?; - let encrypted_data = encrypt_segment(data, *nonce, &key)?; - write_buffer.write_all(&encrypted_data)?; - break; - } - - let nonce = Nonce::from_slice(&nonce_bytes); - //.ok_or(Crypt4GHError::NoRandomNonce)?; - let key = Key::from_slice(&session_key); - //.ok_or(Crypt4GHError::NoKey)?; - let encrypted_data = encrypt_segment(&segment, *nonce, &key)?; - write_buffer.write_all(&encrypted_data)?; - - remaining_length -= segment_len; - } - }, - } - - log::info!("Encryption Successful"); - Ok(()) -} - -/// Builds a header with a random session key -/// -/// Returns the encrypted header bytes -pub fn encrypt_header( - recipient_keys: &HashSet, - session_key: &Option<[u8; 32]>, -) -> Result, Crypt4GHError> { - let encryption_method = 0; +// // random bytes into session_key +// rnd.try_fill_bytes(&mut session_key).map_err(|_| Crypt4GHError::NoRandomNonce)?; - let session_key_or_new = session_key.map_or_else(|| { - let mut session_key = [0_u8; 32]; - let mut rnd = rand_chacha::ChaCha20Rng::from_entropy(); - - rnd.try_fill_bytes(&mut session_key).map_err(|_| Crypt4GHError::NoRandomNonce)?; // TODO: Custom error for this +// let header_bytes = encrypt_header(recipient_keys, &Some(session_key))?; + +// log::debug!("header length: {}", header_bytes.len()); + +// write_buffer.write_all(&header_bytes)?; + +// log::info!("Streaming content"); + +// let mut segment = [0_u8; SEGMENT_SIZE]; + +// let mut rnd = rand_chacha::ChaCha20Rng::from_entropy(); +// let mut nonce_bytes = [0u8; 12]; +// rnd.fill(&mut nonce_bytes); + +// // The whole file +// match range_span { +// None | Some(0) => loop { +// let segment_len = read_buffer.read(&mut segment)?; +// if segment_len == 0 { +// break; +// } +// else if segment_len < SEGMENT_SIZE { +// let (data, _) = segment.split_at(segment_len); +// let nonce = Nonce::from_slice(&nonce_bytes); +// //.map_err(|_| Crypt4GHError::NoRandomNonce)?; +// let key = Key::from_slice(&session_key); +// //.ok_or(Crypt4GHError::NoKey)?; +// let encrypted_data = encrypt_segment(data, *nonce, &key)?; +// write_buffer.write_all(&encrypted_data)?; +// break; +// } +// else { +// let nonce = Nonce::from_slice(&nonce_bytes); +// //.ok_or(Crypt4GHError::NoRandomNonce)?; +// let key = Key::from_slice(&session_key);//.ok_or(Crypt4GHError::NoKey)?; +// let encrypted_data = encrypt_segment(&segment, *nonce, &key)?; +// write_buffer.write_all(&encrypted_data)?; +// } +// }, +// Some(mut remaining_length) => { +// while remaining_length > 0 { +// let segment_len = read_buffer.read(&mut segment)?; + +// // Stop +// if segment_len >= remaining_length { +// let (data, _) = segment.split_at(remaining_length); +// let nonce = Nonce::from_slice(&nonce_bytes); +// //.ok_or(Crypt4GHError::NoRandomNonce)?; +// let key = Key::from_slice(&session_key); +// //.ok_or(Crypt4GHError::NoKey)?; +// let encrypted_data = encrypt_segment(data, *nonce, &key)?; +// write_buffer.write_all(&encrypted_data)?; +// break; +// } + +// // Not a full segment +// if segment_len < SEGMENT_SIZE { +// let (data, _) = segment.split_at(segment_len); +// let nonce = Nonce::from_slice(&nonce_bytes); +// //.ok_or(Crypt4GHError::NoRandomNonce)?; +// let key = Key::from_slice(&session_key); +// //.ok_or(Crypt4GHError::NoKey)?; +// let encrypted_data = encrypt_segment(data, *nonce, &key)?; +// write_buffer.write_all(&encrypted_data)?; +// break; +// } + +// let nonce = Nonce::from_slice(&nonce_bytes); +// //.ok_or(Crypt4GHError::NoRandomNonce)?; +// let key = Key::from_slice(&session_key); +// //.ok_or(Crypt4GHError::NoKey)?; +// let encrypted_data = encrypt_segment(&segment, *nonce, &key)?; +// write_buffer.write_all(&encrypted_data)?; + +// remaining_length -= segment_len; +// } +// }, +// } + +// log::info!("Encryption Successful"); +// Ok(()) +// } - Ok::<_, Crypt4GHError>(session_key) - }, |value| { Ok(value)} )?; - - let header_content = header::make_packet_data_enc(encryption_method, &session_key_or_new); - let header_packets = header::encrypt(&header_content, recipient_keys)?; - let header_bytes = header::serialize(header_packets); - Ok(header_bytes) -} /// Encrypts a segment. /// @@ -256,92 +215,49 @@ pub fn encrypt_segment(data: &[u8], nonce: Nonce, key: &Key) -> Result, Ok(vec![nonce.to_vec(), ciphertext].concat()) } -/// Reads from the `read_buffer` and writes the decrypted data to `write_buffer`. -/// -/// Reads from the `read_buffer` and writes the decrypted data to `write_buffer`. -/// If the range is specified, it will only encrypt the bytes from `range_start` to `range_start` + `range_span`. -/// In case that `range_span` is none, it will encrypt from `range_start` to the end of the input. -/// If `sender_pubkey` is specified the program will check that the `recipient_key` in the message -/// is the same as the `sender_pubkey`. -pub fn decrypt( - keys: &[Keys], - read_buffer: &mut R, - write_buffer: &mut W, - range_start: usize, - range_span: Option, - sender_pubkey: &Option>, -) -> Result<(), Crypt4GHError> { - range_span.map_or_else( - || { - log::info!("Decrypting file | Range: [{}, EOF)", range_start); - }, - |span| { - log::info!("Decrypting file | Range: [{}, {})", range_start, range_start + span + 1); - }, - ); - - // Get header info - let mut temp_buf = [0_u8; 16]; // Size of the header - read_buffer - .read_exact(&mut temp_buf) - .map_err(|e| Crypt4GHError::ReadHeaderError(e.into()))?; - let header_info: header::HeaderInfo = header::deconstruct_header_info(&temp_buf)?; - - // Calculate header packets - let encrypted_packets = (0..header_info.packets_count) - .map(|_| { - // Get length - let mut length_buffer = [0_u8; 4]; - read_buffer - .read_exact(&mut length_buffer) - .map_err(|e| Crypt4GHError::ReadHeaderPacketLengthError(e.into()))?; - let length = bincode::deserialize::(&length_buffer) - .map_err(|e| Crypt4GHError::ParseHeaderPacketLengthError(e))?; - let length = length - 4; - - // Get data - let mut encrypted_data = vec![0_u8; length as usize]; - read_buffer - .read_exact(&mut encrypted_data) - .map_err(|e| Crypt4GHError::ReadHeaderPacketDataError(e.into()))?; - Ok(encrypted_data) - }) - .collect::>, Crypt4GHError>>()?; - - let DecryptedHeaderPackets { - data_enc_packets: session_keys, - edit_list_packet: edit_list, - } = header::deconstruct_header_body(encrypted_packets, keys, sender_pubkey)?; - - range_span.map_or_else( - || { - log::info!("Slicing from {} | Keeping all bytes", range_start); - }, - |span| { - log::info!("Slicing from {} | Keeping {} bytes", range_start, span); - }, - ); - - if range_span.is_some() && range_span.unwrap() == 0 { - return Err(Crypt4GHError::InvalidRangeSpan(range_span)); - } - - let mut write_info = WriteInfo::new(range_start, range_span, write_buffer); - - // TODO: Might fail here on Some() due to read_buffer coming from io::stdin is not populated? See run_decrypt() in bin.rs or - // the appropriate test - match edit_list { - None => body_decrypt(read_buffer, &session_keys, &mut write_info, range_start)?, - Some(edit_list_content) => body_decrypt_parts(read_buffer, session_keys, write_info, edit_list_content)?, - } - - log::info!("Decryption Over"); - Ok(()) +pub fn decrypt( + data_block: Bytes, + session_keys: SessionKeys, + edit_list_packet: Option>, + ) -> Result { + let size = data_block.len(); + + let read_buf = Cursor::new(data_block.to_vec()); + let mut write_buf = Cursor::new(vec![]); + let mut write_info = WriteInfo::new(0, None, &mut write_buf); + + // Todo crypt4gh-rust body_decrypt_parts does not work properly, so just apply edit list here. + body_decrypt(read_buf, session_keys, &mut write_info, 0) + .map_err(|err| Crypt4GHError::UnableToDecryptBlock(read_buf, err.to_string()))?; + let mut decrypted_bytes: Bytes = write_buf.into_inner().into(); + let mut edited_bytes = Bytes::new(); + + let edits = DecrypterStream::<()>::create_internal_edit_list(edit_list_packet) + .unwrap_or(vec![(false, decrypted_bytes.len() as u64)]); + if edits.iter().map(|(_, edit)| edit).sum::() > decrypted_bytes.len() as u64 { + return Err(Crypt4GHError::UnableToDecryptBlock(edits, + "invalid edit lists for the decrypted data block".to_string(), + )); + } + + edits.into_iter().for_each(|(discarding, edit)| { + if !discarding { + let edit = decrypted_bytes.slice(0..edit as usize); + edited_bytes = [edited_bytes.clone(), edit].concat().into(); + } + + decrypted_bytes = decrypted_bytes.slice(edit as usize..); + }); + + Ok(DecryptedDataBlock::new( + DecryptedBytes::new(edited_bytes), + size, + )) } struct DecryptedBuffer<'a, W: Write> { read_buffer: &'a mut dyn Read, - session_keys: Vec>, + session_keys: keys::SessionKeys, buf: Vec, is_decrypted: bool, block: u64, @@ -350,7 +266,7 @@ struct DecryptedBuffer<'a, W: Write> { } impl<'a, W: Write> DecryptedBuffer<'a, W> { - fn new(read_buffer: &'a mut impl Read, session_keys: Vec>, output: WriteInfo<'a, W>) -> Result { + fn new(read_buffer: &'a mut impl Read, session_keys: SessionKeys, output: WriteInfo<'a, W>) -> Result { let mut decryptor = Self { read_buffer, session_keys, @@ -392,7 +308,7 @@ impl<'a, W: Write> DecryptedBuffer<'a, W> { // Decrypts its buffer if !self.is_decrypted { log::debug!("Decrypting block({:?}): {:?}", self.buf.len(), &self.buf); - self.buf = decrypt_block(&self.buf, &self.session_keys)?; + self.buf = decrypt_block(&self.buf, self.session_keys)?; self.is_decrypted = true; } Ok(()) @@ -481,7 +397,7 @@ impl<'a, W: Write> DecryptedBuffer<'a, W> { /// the first `range_start` bytes. It uses the `edit_list` packets. pub fn body_decrypt_parts( mut read_buffer: impl Read, - session_keys: Vec>, + session_keys: SessionKeys, output: WriteInfo, edit_list: Vec, ) -> Result<(), Crypt4GHError> { @@ -532,7 +448,7 @@ pub fn body_decrypt_parts( /// the first `range_start` bytes. pub fn body_decrypt( mut read_buffer: impl Read, - session_keys: &[Vec], + session_keys: SessionKeys, output: &mut WriteInfo, range_start: usize, ) -> Result<(), Crypt4GHError> { @@ -572,14 +488,14 @@ pub fn body_decrypt( } /// Reads and returns the first successfully decrypted block, iterating through all the session keys against one ciphersegment. -fn decrypt_block(ciphersegment: &[u8], session_keys: &[Vec]) -> Result, Crypt4GHError> { +fn decrypt_block(ciphersegment: &[u8], session_keys: SessionKeys) -> Result, Crypt4GHError> { //log::debug!("Decrypt_block()'s the cyphersegment is: {:#?}", ciphersegment); let (nonce_slice, data) = ciphersegment.split_at(12); let nonce_bytes: [u8; 12] = nonce_slice .try_into() .map_err(|_| Crypt4GHError::UnableToWrapNonce)?; - session_keys.iter() + session_keys.inner.iter() .find_map(|key| { let key = Key::from_slice(&key); let key = chacha20poly1305::ChaCha20Poly1305::new(&key); @@ -599,18 +515,16 @@ fn decrypt_block(ciphersegment: &[u8], session_keys: &[Vec]) -> Result( - keys: &[Keys], - recipient_keys: &HashSet, - read_buffer: &mut R, - write_buffer: &mut W, - trim: bool, + keys: &[KeyPairInfo], + recipient_keys: &HashSet, + trim: bool, // FIXME: Does this need to be an argument or can be decided in code? ) -> Result<(), Crypt4GHError> { // Get header info let mut temp_buf = [0_u8; 16]; // Size of the header read_buffer .read_exact(&mut temp_buf) .map_err(|e| Crypt4GHError::ReadHeaderError(e.into()))?; - let header_info: header::HeaderInfo = header::deconstruct_header_info(&temp_buf)?; + let header = Header::from((&temp_buf).to_vec())?; // Calculate header packets let header_packets = (0..header_info.packets_count) @@ -661,9 +575,7 @@ pub fn reencrypt( /// If the range is specified, it will only rearrange the bytes from `range_start` to `range_start` + `range_span`. /// In case that `range_span` is none, it will rearrange from `range_start` to the end of the input. pub fn rearrange( - keys: Vec, - read_buffer: &mut R, - write_buffer: &mut W, + keys: Vec, range_start: usize, range_span: Option, ) -> Result<(), Crypt4GHError> { @@ -672,7 +584,7 @@ pub fn rearrange( read_buffer .read_exact(&mut temp_buf) .map_err(|e| Crypt4GHError::ReadHeaderError(e.into()))?; - let header_info: header::HeaderInfo = header::deconstruct_header_info(&temp_buf)?; + let header_info: Header = deserialize_header_info((&temp_buf).to_vec())?; // Calculate header packets let header_packets = (0..header_info.packets_count) diff --git a/src/util/mod.rs b/src/util/mod.rs new file mode 100644 index 0000000..5e5e38f --- /dev/null +++ b/src/util/mod.rs @@ -0,0 +1,88 @@ +use std::cmp::min; + +use crate::decrypt::reader::decode::Block; +// use crate::error::Crypt4GHError; +// use crate::keys::{KeyPair, PublicKey}; + +fn to_current_data_block(pos: u64, header_len: u64) -> u64 { + header_len + (pos / Block::encrypted_block_size()) * Block::standard_data_block_size() +} + +/// Convert an unencrypted file position to an encrypted position if the header length is known. +pub fn to_encrypted(position: u64, header_length: u64) -> u64 { + let number_data_blocks = position / Block::encrypted_block_size(); + // Additional bytes include the full data block size. + let mut additional_bytes = number_data_blocks * (Block::nonce_size() + Block::mac_size()); + + // If there is left over data, then there are more nonce bytes. + let remainder = position % Block::encrypted_block_size(); + if remainder != 0 { + additional_bytes += Block::nonce_size(); + } + + // Then add the extra bytes to the current position. + header_length + position + additional_bytes +} + +/// Convert an encrypted file position to an unencrypted position if the header length is known. +pub fn to_unencrypted(encrypted_position: u64, header_length: u64) -> u64 { + let number_data_blocks = encrypted_position / Block::standard_data_block_size(); + let mut additional_bytes = number_data_blocks * (Block::nonce_size() + Block::mac_size()); + + let remainder = encrypted_position % Block::standard_data_block_size(); + if remainder != 0 { + additional_bytes += Block::nonce_size(); + } + + encrypted_position - header_length - additional_bytes +} + +/// Convert an unencrypted file size to an encrypted file size if the header length is known. +pub fn to_encrypted_file_size(file_size: u64, header_length: u64) -> u64 { + to_encrypted(file_size, header_length) + Block::mac_size() +} + +/// Convert an encrypted file size to an unencrypted file size if the header length is known. +pub fn to_unencrypted_file_size(encrypted_file_size: u64, header_length: u64) -> u64 { + to_unencrypted(encrypted_file_size, header_length) - Block::mac_size() +} + +/// Convert an unencrypted position to an encrypted position as shown in +/// https://samtools.github.io/hts-specs/crypt4gh.pdf chapter 4.1. +pub fn unencrypted_to_data_block(pos: u64, header_len: u64, encrypted_file_size: u64) -> u64 { + min(encrypted_file_size, to_current_data_block(pos, header_len)) +} + +/// Get the next data block position from the unencrypted position. +pub fn unencrypted_to_next_data_block(pos: u64, header_len: u64, encrypted_file_size: u64) -> u64 { + min( + encrypted_file_size, + to_current_data_block(pos, header_len) + Block::standard_data_block_size(), + ) +} + +fn unencrypted_clamped_position(pos: u64, encrypted_file_size: u64) -> u64 { + let data_block_positions = unencrypted_to_data_block(pos, 0, encrypted_file_size); + let data_block_count = data_block_positions / Block::standard_data_block_size(); + + data_block_positions - ((Block::nonce_size() + Block::mac_size()) * data_block_count) +} + +/// Convert an unencrypted position to the additional bytes prior to the position that must be +/// included when encrypting data blocks. +pub fn unencrypted_clamp(pos: u64, encrypted_file_size: u64) -> u64 { + min( + to_unencrypted_file_size(encrypted_file_size, 0), + unencrypted_clamped_position(pos, encrypted_file_size), + ) +} + +/// Convert an unencrypted position to the additional bytes after to the position that must be +/// included when encrypting data blocks. +pub fn unencrypted_clamp_next(pos: u64, encrypted_file_size: u64) -> u64 { + min( + to_unencrypted_file_size(encrypted_file_size, 0), + unencrypted_clamped_position(pos, encrypted_file_size) + Block::encrypted_block_size(), + ) +} + diff --git a/tests/README.md b/tests/README.md deleted file mode 100644 index 12c0b35..0000000 --- a/tests/README.md +++ /dev/null @@ -1,49 +0,0 @@ -# Testing - -```sh -cargo test --release -- --test-threads 1 -``` - -## Crypt4GH testsuite - -We run the following tests: - -These tests treat the system as a black box, only checking the expected output for a given input. - -We use 2 users: Alice and Bob. - -### Full file Encryption/Decryption - -We use a `testfile` containing the sequence of letters `abcd`, where each letter is repeated 65536 times. - -- [x] Bob encrypts a 10MB file for Alice, and Alice decrypts it. Expected outcome: Alice reads the same content as Bob had. - -- [x] Bob encrypts the testfile for Alice, and Alice decrypts it. Expected outcome: Alice reads the same content as testfile. - -- [x] Bob encrypts the testfile for himself. Bob takes the resulting file and only changes the recipient to be Alice. Alice decrypts what she receives. Expected outcome: Alice reads the same content as testfile. - -### Segmenting an encrypted file - -We use the testfile and Bob encrypts it for himself. - -- [x] Bob encrypts only the "b"'s from the testfile for Alice, using the `--range` flag. Alice decrypts what she receives. Expected outcome: Alice reads 65536 "b"s. - -- [x] Bob rerranges the encrypted file using the `--range 65536-131073` flag, to only the "b"s. Bob takes the resulting file and only changes the recipient to be Alice. Alice decrypts what she receives. Expected outcome: Alice reads 65536 "b"s. - -- [x] Bob rerranges the encrypted file using the `--range 65535-131074` flag, for Alice, to match one "a", all the "b"s, and one "c". Expected outcome: Alice reads one "a", 65536 "b"s and one "c". - -- [x] Bob sends the secret message `Let's have beers in the sauna! or Dinner at 7pm?` to Alice. The message is buried in the middle of some random data. Alice decrypts what she receives. Expected outcome: Alice reads `Let's have beers in the sauna! or Dinner at 7pm?`. - -### Using SSH keys - -- [x] Bob encrypts a 10MB file for Alice, using his own SSH keypair, and Alice decrypts it, using her Crypt4GH keypair. Expected outcome: Alice reads the same content as Bob had. - -- [x] Bob encrypts a 10MB file for Alice, using his own Crypt4GH keypair, and Alice decrypts it, using her SSH keypair. Expected outcome: Alice reads the same content as testfile. - -- [x] Bob encrypts a 10MB file for Alice, and Alice decrypts it, both using their SSH keypair. Expected outcome: Alice reads the same content as testfile. - -### Multiple recipients - -- [x] Bob sends the testfile secretly to himself and Alice. Expected outcome: They both can read the same content as Bob had. - -- [x] Bob encrypts the testfile for himself and reencrypts it for himself and Alice. Expected outcome: They both can read the same content as Bob had. diff --git a/tests/edit_list_gen.rs b/tests/edit_list_gen.rs deleted file mode 100644 index 4d15bdb..0000000 --- a/tests/edit_list_gen.rs +++ /dev/null @@ -1,89 +0,0 @@ -#![allow(clippy::missing_panics_doc)] - -use std::fs::File; -use std::io::Write; -use std::path::{Path, PathBuf}; - -use crypt4gh::error::Crypt4GHError; -use chacha20poly1305::{ self, Key, Nonce }; -use rand_chacha; -use rand::{Rng, SeedableRng}; - -pub fn generate(sk: &str, recipient_pk: &str, input: &str, outfile: &mut File, passphrase: &str) -> Result<(), Crypt4GHError> { - let mut rng = rand::thread_rng(); - - let parts = input.lines().collect::>(); - let skips = parts.iter().copied().map(|_| 50000); - - let mut message = Vec::new(); - let mut edits = Vec::new(); - - for (skip, part) in skips.into_iter().zip(parts.iter()) { - message.extend((0..skip).map(|_| rand::random::())); - message.extend(part.as_bytes().iter()); - edits.push(skip); - edits.push(part.len()); - } - - log::debug!("Edits: {:?}", edits); - - // Fetch the keys - - log::debug!("SK: {:?}", sk); - assert!(Path::new(sk).exists()); // TODO: Migrate to Crypt4GHError - log::debug!("Recipient PK: {:?}", recipient_pk); - assert!(Path::new(recipient_pk).exists(), "Edit list gen key not found"); // TODO: Migrate to Crypt4GHError - - let callback = Ok(passphrase.to_string()); - let seckey = crypt4gh::keys::get_private_key(PathBuf::from(sk), callback)?; - let recipient_pubkey = crypt4gh::keys::get_public_key(PathBuf::from(recipient_pk))?; - - log::debug!("Sec: {:?}\n with length: {:?}", seckey, seckey.len()); - log::debug!("Pub: {:?}\n with length: {:?}", recipient_pubkey, recipient_pubkey.len()); - - let keys = vec![crypt4gh::Keys { - method: 0, - privkey: seckey, - recipient_pubkey, - }] - .into_iter() - .collect(); - - // Prepare encryption engine - - let encryption_method = 0; // Only choice for this version - let session_key: [u8; 32] = rng.gen(); // We use one session key for all blocks - - // Output the header - - let packets = vec![ - crypt4gh::header::make_packet_data_enc(encryption_method, &session_key), - crypt4gh::header::make_packet_data_edit_list(edits), - ]; - - let header_packets: Vec> = packets - .into_iter() - .flat_map(|packet| crypt4gh::header::encrypt(&packet, &keys).unwrap()) - .collect(); - let mangled_header_packets = header_packets; - let mangled_header_packets = crypt4gh::header::serialize(mangled_header_packets); - outfile.write_all(&mangled_header_packets)?; - - log::debug!("header length: {}", mangled_header_packets.len()); - - // TODO: Perhaps migrate rest of this file to rnd instead of rng (crypto-safe PRNG?) - let mut rnd = rand_chacha::ChaCha20Rng::from_entropy(); - let mut random_buf = [0u8; 12]; - rnd.fill(&mut random_buf); - - // Output the message - for segment in message.chunks(crypt4gh::SEGMENT_SIZE) { - let nonce = Nonce::from_slice(&random_buf); - let key = Key::from_slice(&session_key); - - let encrypted_segment = crypt4gh::encrypt_segment(segment, *nonce, &key)?; - outfile.write_all(&encrypted_segment)?; - } - - Ok(()) -} diff --git a/tests/test_common.rs b/tests/test_common.rs deleted file mode 100644 index 3590e8c..0000000 --- a/tests/test_common.rs +++ /dev/null @@ -1,355 +0,0 @@ -#![allow(clippy::missing_panics_doc)] - -use std::env; -use std::ffi::OsStr; -use std::fs::File; -use std::io::Write; -use std::path::PathBuf; -use std::process::{Command, ExitStatus, Stdio}; - -pub const BOB_PASSPHRASE: &str = "bob"; -pub const BOB_PUBKEY: &str = "testfiles/bob.pub"; -pub const BOB_SECKEY: &str = "testfiles/bob.sec"; - -pub const BOB_SECKEY_SSH: &str = "bob.sshkey"; -pub const BOB_PUBKEY_SSH: &str = "bob.sshkey.pub"; - -pub const ALICE_PASSPHRASE: &str = "alice"; -pub const ALICE_PUBKEY: &str = "testfiles/alice.pub"; -pub const ALICE_SECKEY: &str = "testfiles/alice.sec"; - -pub const ALICE_SECKEY_SSH: &str = "alice.sshkey"; -pub const ALICE_PUBKEY_SSH: &str = "alice.sshkey.pub"; - -pub const TEMP_LOCATION: &str = "tests/tempfiles"; -pub const TESTFILE_ABCD: &str = "tests/testfiles/testfile.abcd"; -pub const TESTFILE_ABBBC: &str = "tests/testfiles/testfile.abbbc"; - -pub struct CommandUnderTest { - raw: Command, - stdin: Vec, - run: bool, - stdout: String, - stderr: String, -} - -impl CommandUnderTest { - #[must_use] - pub fn new() -> Self { - // To find the directory where the built binary is, we walk up the directory tree of the test binary until the - // parent is "target/". - let mut binary_path = env::current_exe().expect("need current binary path to find binary to test"); - loop { - { - let parent = binary_path.parent(); - assert!( - parent.is_some(), - "Failed to locate binary path from original path: {:?}", - env::current_exe() - ); - let parent = parent.unwrap(); - if parent.is_dir() && parent.file_name().unwrap() == "target" { - break; - } - } - binary_path.pop(); - } - - binary_path.push( - if cfg!(target_os = "windows") { - format!("{}.exe", env!("CARGO_BIN_EXE_crypt4gh")) - } - else { - env!("CARGO_BIN_EXE_crypt4gh").to_string() - }, - ); - - let mut cmd = Command::new(binary_path); - - let mut work_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR")); - work_dir.push("tests"); - - cmd.stdout(Stdio::piped()).stderr(Stdio::piped()).current_dir(work_dir); - - Self { - raw: cmd, - run: false, - stdin: Vec::new(), - stdout: String::new(), - stderr: String::new(), - } - } - - pub fn env(&mut self, key: &str, val: &str) -> &mut Self { - self.raw.env(key, val); - self - } - - pub fn same_envs(&mut self) -> &mut Self { - self.raw.envs(env::vars()); - self - } - - pub fn arg>(&mut self, arg: S) -> &mut Self { - self.raw.arg(arg); - self - } - - pub fn args(&mut self, args: I) -> &mut Self - where - I: IntoIterator, - S: AsRef, - { - self.raw.args(args); - self - } - - pub fn pipe_in(&mut self, filename: &str) -> &mut Self { - let file = File::open(filename).unwrap(); - self.raw.stdin(Stdio::from(file)); - self - } - - pub fn pipe_out(&mut self, filename: &str) -> &mut Self { - let file = File::create(filename).unwrap(); - self.raw.stdout(Stdio::from(file)); - self - } - - pub fn run(&mut self) -> ExitStatus { - let mut child = self.raw.spawn().expect("failed to run command"); - - if !self.stdin.is_empty() { - let stdin = child.stdin.as_mut().expect("failed to open stdin"); - stdin.write_all(&self.stdin).expect("failed to write to stdin"); - } - - let output = child - .wait_with_output() - .expect("failed waiting for command to complete"); - self.stdout = String::from_utf8(output.stdout).unwrap(); - self.stderr = String::from_utf8(output.stderr).unwrap(); - self.run = true; - output.status - } - - pub fn fails(&mut self) -> &mut Self { - assert!(!self.run().success(), "expected command to fail"); - self - } - - pub fn succeeds(&mut self) -> &mut Self { - let status = self.run(); - assert!( - status.success(), - "expected command to succeed, but it failed.\nexit code: {}\nstdout: {}\nstderr:{}\n", - status.code().unwrap(), - self.stdout, - self.stderr, - ); - self - } - - pub fn no_stdout(&mut self) -> &mut Self { - assert!(self.run, "command has not yet been run, use succeeds()/fails()"); - assert!(self.stdout.is_empty(), "expected no stdout, got {}", self.stdout); - self - } - - pub fn no_stderr(&mut self) -> &mut Self { - assert!(self.run, "command has not yet been run, use succeeds()/fails()"); - assert!(self.stderr.is_empty(), "expected no stderr, got {}", self.stderr); - self - } - - pub fn stdout_is(&mut self, expected: &str) -> &mut Self { - assert!(self.run, "command has not yet been run, use succeeds()/fails()"); - assert_eq!(&self.stdout[..], expected, "stdout does not match expected"); - self - } - - pub fn stderr_is(&mut self, expected: &str) -> &mut Self { - assert!(self.run, "command has not yet been run, use succeeds()/fails()"); - assert_eq!(&self.stderr[..], expected, "stderr does not match expected"); - self - } -} - -impl Default for CommandUnderTest { - fn default() -> Self { - Self::new() - } -} - -pub struct Cleanup; - -impl Drop for Cleanup { - fn drop(&mut self) { - eprintln!("DROP"); - remove_file(TEMP_LOCATION); - } -} - -impl Cleanup { - #[must_use] - pub fn new() -> Self { - eprintln!("Created!"); - Command::new("mkdir") - .arg(TEMP_LOCATION) - .stderr(Stdio::null()) - .spawn() - .unwrap() - .wait() - .unwrap(); - Self {} - } -} - -impl Default for Cleanup { - fn default() -> Self { - Self::new() - } -} - -pub fn equal(file1: &str, file2: &str) { - let status = Command::new("diff") - .arg(file1) - .arg(file2) - .stderr(Stdio::null()) - .stdout(Stdio::null()) - .spawn() - .unwrap() - .wait() - .unwrap() - .code() - .unwrap(); - assert_eq!(status, 0); -} - -pub fn new_random_file(filename: &str, size_in_mb: usize) { - File::create(filename).unwrap(); - let status = Command::new("dd") - .arg("if=/dev/urandom") - .arg("bs=1048576") - .arg(format!("count={}", size_in_mb)) - .arg(format!("of={}", filename)) - .stderr(Stdio::null()) - .spawn() - .unwrap() - .wait() - .unwrap() - .code() - .unwrap(); - assert_eq!(status, 0); -} - -pub fn remove_file(file_pattern: &str) { - Command::new(r#"rm"#) - .arg("-rf") - .arg(file_pattern) - .spawn() - .unwrap() - .wait() - .ok(); -} - -#[must_use] -pub fn temp_file(filename: &str) -> String { - let mut s = TEMP_LOCATION.to_string(); - s.push('/'); - s.push_str(filename); - s -} - -#[must_use] -pub fn strip_prefix(filename: &str) -> String { - let ref_file = PathBuf::from(temp_file(filename)); - let ref_file = ref_file.strip_prefix("tests/").unwrap(); - ref_file.to_str().unwrap().to_string() -} - -#[must_use] -pub fn add_prefix(filename: &str) -> String { - let mut ref_file = PathBuf::new(); - ref_file.push("tests/"); - ref_file.push(filename); - ref_file.to_str().unwrap().to_string() -} - -pub fn ssh_gen(secret_filepath: &str, passphrase: &str) { - let status = Command::new("ssh-keygen") - .arg("-t") - .arg("ed25519") - .arg("-f") - .arg(secret_filepath) - .arg("-N") - .arg(passphrase) - .stderr(Stdio::null()) - .stdout(Stdio::null()) - .spawn() - .unwrap() - .wait() - .unwrap() - .code() - .unwrap(); - assert_eq!(status, 0); -} - -pub fn echo(message: &str, filename: &str) { - let file = File::create(filename).unwrap(); - let status = Command::new("echo") - .arg("-n") - .arg(message) - .stderr(Stdio::null()) - .stdout(Stdio::from(file)) - .spawn() - .unwrap() - .wait() - .unwrap() - .code() - .unwrap(); - assert_eq!(status, 0); -} - -pub fn count_characters(filepath: &str, assert_size: usize) { - let wc = Command::new("wc") - .arg("-c") - .arg(filepath) - .stderr(Stdio::null()) - .output() - .unwrap(); - - let mut awk = Command::new("awk") - .arg("{ print $1 }") - .stdin(Stdio::piped()) - .stderr(Stdio::null()) - .stdout(Stdio::piped()) - .spawn() - .unwrap(); - - { - let awk_in = awk.stdin.as_mut().unwrap(); - awk_in.write_all(&wc.stdout).unwrap(); - } - - let result = awk.wait_with_output().unwrap(); - - assert!(result.status.success()); - let out = String::from_utf8(result.stdout).unwrap(); - assert_eq!(out.trim().parse::().unwrap(), assert_size); -} - -pub fn grep(filepath: &str, substring: &str) { - let status = Command::new("grep") - .arg("-v") - .arg(substring) - .arg(filepath) - .stderr(Stdio::null()) - .spawn() - .unwrap() - .wait() - .unwrap() - .code() - .unwrap(); - assert_eq!(status, 1); -} diff --git a/tests/test_edit_list.rs b/tests/test_edit_list.rs deleted file mode 100644 index f0b536c..0000000 --- a/tests/test_edit_list.rs +++ /dev/null @@ -1,99 +0,0 @@ -mod edit_list_gen; -mod test_common; - -use std::{fs::File, path::PathBuf}; - -pub use test_common::*; -use testresult::TestResult; -use crypt4gh::keys::get_private_key; -use crypt4gh::Keys; -use std::io::Read; - - -const INPUT_EDIT_LIST: &str = "Let's have - beers -in the sauna! - or -Dinner -at 7pm? -"; - -#[test] -fn test_send_message_buried() -> TestResult { - pretty_env_logger::init(); - - // Init - let init = Cleanup::new(); - - // Create input file - echo( - "Let's have beers in the sauna! or Dinner at 7pm?", - &temp_file("message.bob"), - ); - - // Bob encrypts a file for Alice, and tucks in an edit list. The skipped pieces are random data. - let mut file = File::create(&temp_file("message.bob.c4gh"))?; - edit_list_gen::generate( - &add_prefix(BOB_SECKEY), - &add_prefix(ALICE_PUBKEY), - INPUT_EDIT_LIST, - &mut file, - BOB_PASSPHRASE, - )?; - - let sender_pubkey = None; - let (range_start, range_span) = (0, None); - - let seckey = get_private_key(PathBuf::from("tests/testfiles/alice.sec"), Ok(ALICE_PASSPHRASE.to_string()))?; - - let keys = vec![Keys { - method: 0, - privkey: seckey, - recipient_pubkey: vec![], - }]; - - // log::debug!("run_decrypt()'s parameters: {:#?}, {}, {:#?}, {:#?}", &keys, range_start, range_span, &sender_pubkey ); - - let mut file = File::open(PathBuf::from("tests/tempfiles/message.bob.c4gh"))?; - - let mut out = vec![]; - file.read_to_end(&mut out)?; - - let mut buf_in = std::io::BufReader::new(&out[..]); - let mut buf = vec![]; - - // Decrypt - crypt4gh::decrypt( - &keys, - &mut buf_in, - &mut buf, - range_start, - range_span, - &sender_pubkey, - )?; - - // This CLI-only testing (integration tests) garble stdin/stdout which makes it very impractical to debug (with log::debug/log::info). - // - // CommandUnderTest::new() - // .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - // .arg("decrypt") - // .arg("--sk") - // .arg(ALICE_SECKEY) - // .pipe_in(&temp_file("message.bob.c4gh")) - // .pipe_out(&temp_file("message.alice")) - // .succeeds(); - - let mut bob = File::open(&temp_file("message.bob")).unwrap(); - let mut out_copy = vec![]; - bob.read_to_end(&mut out_copy)?; - assert_eq!(buf, out_copy); - - // Compare - // equal(&temp_file("message.bob"), &temp_file("message.alice")); - - // Cleanup - drop(init); - - // All went fine! - Ok(()) -} diff --git a/tests/test_full_file.rs b/tests/test_full_file.rs deleted file mode 100644 index 4ba4e88..0000000 --- a/tests/test_full_file.rs +++ /dev/null @@ -1,164 +0,0 @@ -mod test_common; - -pub use test_common::*; -use testresult::TestResult; - -#[test] -fn test_encrypt_decrypt_random() -> TestResult { - // Init - let init = Cleanup::new(); - - // Create random file - new_random_file(&temp_file("random.10MB"), 10); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(ALICE_PUBKEY) - .pipe_in(&temp_file("random.10MB")) - .pipe_out(&temp_file("random.10MB.c4gh")) - .succeeds(); - - // Decrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("random.10MB.c4gh")) - .pipe_out(&temp_file("random.10MB.received")) - .succeeds(); - - // Compare - equal(&temp_file("random.10MB"), &temp_file("random.10MB.received")); - - // Cleanup - drop(init); - - Ok(()) -} - -#[test] -fn test_encrypt_decrypt_testfile() -> TestResult { - // Init - let init = Cleanup::new(); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(ALICE_PUBKEY) - .pipe_in(TESTFILE_ABCD) - .pipe_out(&temp_file("message.c4gh")) - .succeeds(); - - // Decrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("message.c4gh")) - .pipe_out(&temp_file("message.received")) - .succeeds(); - - // Compare - equal(TESTFILE_ABCD, &temp_file("message.received")); - - // Cleanup - drop(init); - - Ok(()) -} - -#[test] -fn test_encrypt_then_reencrypt() -> TestResult { - // Init - let init = Cleanup::new(); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(BOB_PUBKEY) - .pipe_in(TESTFILE_ABCD) - .pipe_out(&temp_file("message.bob.c4gh")) - .succeeds(); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("reencrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(ALICE_PUBKEY) - .pipe_in(&temp_file("message.bob.c4gh")) - .pipe_out(&temp_file("message.c4gh")) - .succeeds(); - - // Decrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("message.c4gh")) - .pipe_out(&temp_file("message.received")) - .succeeds(); - - // Compare - equal(TESTFILE_ABCD, &temp_file("message.received")); - - // Cleanup - drop(init); - - Ok(()) -} - -#[test] -fn test_encrypt_with_missing_key() -> TestResult { - // Init - let init = Cleanup::new(); - - // Create random file - new_random_file(&temp_file("random.10MB"), 10); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--recipient_pk") - .arg(ALICE_PUBKEY) - .pipe_in(&temp_file("random.10MB")) - .pipe_out(&temp_file("random.10MB.c4gh")) - .succeeds(); - - // Decrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("random.10MB.c4gh")) - .pipe_out(&temp_file("random.10MB.received")) - .succeeds(); - - // Compare - equal(&temp_file("random.10MB"), &temp_file("random.10MB.received")); - - // Cleanup - drop(init); - - Ok(()) -} diff --git a/tests/test_keygen.rs b/tests/test_keygen.rs deleted file mode 100644 index dc0109d..0000000 --- a/tests/test_keygen.rs +++ /dev/null @@ -1,56 +0,0 @@ -mod test_common; - -use std::path::PathBuf; - -pub use test_common::*; -use testresult::TestResult; - -#[test] -fn test_keygen() -> TestResult { - // Init - let init = Cleanup::new(); - - let bob_pk_path = temp_file("bob.pub"); - let bob_sk_path = temp_file("bob.sec"); - let callback = Ok(BOB_PASSPHRASE.to_string()); - - crypt4gh::keys::generate_keys(PathBuf::from(&bob_sk_path), PathBuf::from(&bob_pk_path), callback, None) - .expect("Unable to generate Bob's keys"); - - let alice_pk_path = temp_file("alice.pub"); - let alice_sk_path = temp_file("alice.sec"); - let callback2 = Ok(ALICE_PASSPHRASE.to_string()); - - crypt4gh::keys::generate_keys(PathBuf::from(&alice_sk_path), PathBuf::from(&alice_pk_path), callback2, None) - .expect("Unable to generate Alice's keys"); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(strip_prefix("bob.sec")) - .arg("--recipient_pk") - .arg(strip_prefix("alice.pub")) - .pipe_in(TESTFILE_ABCD) - .pipe_out(&temp_file("message.c4gh")) - .succeeds(); - - // Decrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(strip_prefix("alice.sec")) - .pipe_in(&temp_file("message.c4gh")) - .pipe_out(&temp_file("message.received")) - .succeeds(); - - // Compare - equal(TESTFILE_ABCD, &temp_file("message.received")); - - // Cleanup - drop(init); - - Ok(()) -} diff --git a/tests/test_keygen_length.rs b/tests/test_keygen_length.rs deleted file mode 100644 index 9f66c3e..0000000 --- a/tests/test_keygen_length.rs +++ /dev/null @@ -1,48 +0,0 @@ -mod test_common; - -use std::path::PathBuf; - -pub use test_common::*; -use testresult::TestResult; - -#[test] -fn test_keygen_length_encrypted() -> TestResult { - // Init - let init = Cleanup::new(); - - let bob_pk_path = temp_file("bob.pub"); - let bob_sk_path = temp_file("bob.sec"); - let callback = Ok(BOB_PASSPHRASE.to_string()); - - crypt4gh::keys::generate_keys(PathBuf::from(&bob_sk_path), PathBuf::from(&bob_pk_path), callback, None) - .expect("Unable to generate Bob's keys"); - - count_characters(&temp_file("bob.pub"), 36 + 45 + 34); - count_characters(&temp_file("bob.sec"), 37 + 161 + 35); - - // Cleanup - drop(init); - - Ok(()) -} - -#[test] -fn test_keygen_length_not_encrypted() -> TestResult { - // Init - let init = Cleanup::new(); - - let alice_pk_path = temp_file("alice.pub"); - let alice_sk_path = temp_file("alice.sec"); - let callback = Ok("".to_string()); - - crypt4gh::keys::generate_keys(PathBuf::from(&alice_sk_path), PathBuf::from(&alice_pk_path), callback, None) - .expect("Unable to generate Bob's keys"); - - count_characters(&temp_file("alice.pub"), 36 + 45 + 34); - count_characters(&temp_file("alice.sec"), 37 + 73 + 35); - - // Cleanup - drop(init); - - Ok(()) -} diff --git a/tests/test_keys.rs b/tests/test_keys.rs deleted file mode 100644 index 755f270..0000000 --- a/tests/test_keys.rs +++ /dev/null @@ -1,172 +0,0 @@ -mod test_common; - -use std::{path::PathBuf, fs::File, io::Read}; - -use crypt4gh::{keys::get_private_key, Keys}; -pub use test_common::*; -use testresult::TestResult; - -// #[test] -// fn encrypt_ssh_decrypt() -> TestResult { -// // Init -// let init = Cleanup::new(); - -// // Create random file -// new_random_file(&temp_file("random.10MB"), 10); - -// remove_file(&temp_file(BOB_PUBKEY_SSH)); -// remove_file(&temp_file(BOB_SECKEY_SSH)); - -// ssh_gen(&temp_file(BOB_SECKEY_SSH), BOB_PASSPHRASE); - -// // Encrypt -// CommandUnderTest::new() -// .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) -// .arg("encrypt") -// .arg("--sk") -// .arg(&strip_prefix(BOB_SECKEY_SSH)) -// .arg("--recipient_pk") -// .arg(ALICE_PUBKEY) -// .pipe_in(&temp_file("random.10MB")) -// .pipe_out(&temp_file("random.10MB.c4gh")) -// .succeeds(); - -// // Decrypt -// CommandUnderTest::new() -// .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) -// .arg("decrypt") -// .arg("--sk") -// .arg(ALICE_SECKEY) -// .pipe_in(&temp_file("random.10MB.c4gh")) -// .pipe_out(&temp_file("random.10MB.received")) -// .succeeds(); - -// // Compare -// equal(&temp_file("random.10MB"), &temp_file("random.10MB.received")); - -// // Cleanup -// drop(init); - -// Ok(()) -// } - -#[test] -fn encrypt_decrypt_ssh() -> TestResult{ - // Init - let init = Cleanup::new(); - pretty_env_logger::init(); - - // Create random file - new_random_file(&temp_file("random.10MB"), 10); - - remove_file(&temp_file(ALICE_PUBKEY_SSH)); - remove_file(&temp_file(ALICE_SECKEY_SSH)); - - ssh_gen(&temp_file(ALICE_SECKEY_SSH), ALICE_PASSPHRASE); - - let sender_pubkey = None; - let (range_start, range_span) = (0, None); - - let seckey = get_private_key(PathBuf::from("tests/tempfiles/alice.sshkey"), Ok(ALICE_PASSPHRASE.to_string()))?; - - let keys = vec![Keys { - method: 0, - privkey: seckey, - recipient_pubkey: vec![], - }]; - - let mut file = File::open(PathBuf::from("tests/tempfiles/random.10MB.c4gh"))?; - - let mut out = vec![]; - file.read_to_end(&mut out)?; - - let mut buf_in = std::io::BufReader::new(&out[..]); - let mut buf = vec![]; - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(&strip_prefix(ALICE_PUBKEY_SSH)) - .pipe_in(&temp_file("random.10MB")) - .pipe_out(&temp_file("random.10MB.c4gh")) - .succeeds(); - - // Decrypt - crypt4gh::decrypt( - &keys, - &mut buf_in, - &mut buf, - range_start, - range_span, - &sender_pubkey, - )?; - - // Decrypt - // CommandUnderTest::new() - // .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - // .arg("decrypt") - // .arg("--sk") - // .arg(&strip_prefix(ALICE_SECKEY_SSH)) - // .pipe_in(&temp_file("random.10MB.c4gh")) - // .pipe_out(&temp_file("random.10MB.received")) - // .succeeds(); - - // Compare - equal(&temp_file("random.10MB"), &temp_file("random.10MB.received")); - - // Cleanup - drop(init); - - Ok(()) -} - -// #[test] -// fn encrypt_ssh_decrypt_ssh() -> TestResult { -// // Init -// let init = Cleanup::new(); - -// // Create random file -// new_random_file(&temp_file("random.10MB"), 10); - -// remove_file(&temp_file(ALICE_PUBKEY_SSH)); -// remove_file(&temp_file(ALICE_SECKEY_SSH)); -// remove_file(&temp_file(BOB_PUBKEY_SSH)); -// remove_file(&temp_file(BOB_SECKEY_SSH)); - -// ssh_gen(&temp_file(ALICE_SECKEY_SSH), ALICE_PASSPHRASE); -// ssh_gen(&temp_file(BOB_SECKEY_SSH), BOB_PASSPHRASE); - -// // Encrypt -// CommandUnderTest::new() -// .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) -// .arg("encrypt") -// .arg("--sk") -// .arg(&strip_prefix(BOB_SECKEY_SSH)) -// .arg("--recipient_pk") -// .arg(&strip_prefix(ALICE_PUBKEY_SSH)) -// .pipe_in(&temp_file("random.10MB")) -// .pipe_out(&temp_file("random.10MB.c4gh")) -// .succeeds(); - -// // Decrypt -// CommandUnderTest::new() -// .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) -// .arg("decrypt") -// .arg("--sk") -// .arg(&strip_prefix(ALICE_SECKEY_SSH)) -// .pipe_in(&temp_file("random.10MB.c4gh")) -// .pipe_out(&temp_file("random.10MB.received")) -// .succeeds(); - -// // Compare -// equal(&temp_file("random.10MB"), &temp_file("random.10MB.received")); - -// // Cleanup -// drop(init); - -// Ok(()) -// } diff --git a/tests/test_multiple_recipients.rs b/tests/test_multiple_recipients.rs deleted file mode 100644 index 0bf6079..0000000 --- a/tests/test_multiple_recipients.rs +++ /dev/null @@ -1,114 +0,0 @@ -mod test_common; - -pub use test_common::*; -use testresult::TestResult; - -#[test] -fn send_to_bob_and_alice() -> TestResult { - // Init - let init = Cleanup::new(); - - // Create random file - new_random_file(&temp_file("random.10MB"), 10); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(BOB_PUBKEY) - .arg(ALICE_PUBKEY) - .pipe_in(&temp_file("random.10MB")) - .pipe_out(&temp_file("random.10MB.c4gh")) - .succeeds(); - - // Alice decrypts - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("random.10MB.c4gh")) - .pipe_out(&temp_file("random.10MB.received")) - .succeeds(); - - // Bob decrypts - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .pipe_in(&temp_file("random.10MB.c4gh")) - .pipe_out(&temp_file("random.10MB.received")) - .succeeds(); - - // Compare - equal(&temp_file("random.10MB"), &temp_file("random.10MB.received")); - - // Cleanup - drop(init); - - Ok(()) -} - -#[test] -fn reencrypt_to_bob_and_alice() -> TestResult { - // Init - let init = Cleanup::new(); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(BOB_PUBKEY) - .pipe_in(TESTFILE_ABCD) - .pipe_out(&temp_file("message.bob.c4gh")) - .succeeds(); - - // Reencrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("reencrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(BOB_PUBKEY) - .arg(ALICE_PUBKEY) - .pipe_in(&temp_file("message.bob.c4gh")) - .pipe_out(&temp_file("message.c4gh")) - .succeeds(); - - // Alice decrypts - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("message.c4gh")) - .pipe_out(&temp_file("message.alice.received")) - .succeeds(); - - // Bob decrypts - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .pipe_in(&temp_file("message.c4gh")) - .pipe_out(&temp_file("message.bob.received")) - .succeeds(); - - // Compare - equal(TESTFILE_ABCD, &temp_file("message.alice.received")); - equal(TESTFILE_ABCD, &temp_file("message.bob.received")); - - // Cleanup - drop(init); - - Ok(()) -} diff --git a/tests/test_segments.rs b/tests/test_segments.rs deleted file mode 100644 index 3716512..0000000 --- a/tests/test_segments.rs +++ /dev/null @@ -1,143 +0,0 @@ -mod test_common; - -pub use test_common::*; -use testresult::TestResult; - -#[test] -fn test_send_all_b() -> TestResult { - // Init - let init = Cleanup::new(); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(ALICE_PUBKEY) - .arg("--range") - .arg("65536-131073") - .pipe_in(TESTFILE_ABCD) - .pipe_out(&temp_file("message.b.c4gh")) - .succeeds(); - - // Decrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("message.b.c4gh")) - .pipe_out(&temp_file("message.b.received")) - .succeeds(); - - // Count - count_characters(&temp_file("message.b.received"), 65536); - - // All Bs - grep(&temp_file("message.b.received"), "b"); - - // Cleanup - drop(init); - - Ok(()) -} - -#[test] -fn test_send_one_a_all_b_one_c() -> TestResult { - // Init - let init = Cleanup::new(); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(ALICE_PUBKEY) - .arg("--range") - .arg("65535-131074") - .pipe_in(TESTFILE_ABCD) - .pipe_out(&temp_file("message.abbbc.c4gh")) - .succeeds(); - - // Decrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("message.abbbc.c4gh")) - .pipe_out(&temp_file("message.abbbc.received")) - .succeeds(); - - // Compare - equal(TESTFILE_ABBBC, &temp_file("message.abbbc.received")); - - // Cleanup - drop(init); - - Ok(()) -} - -#[test] -fn test_rearrange_one_a_all_b_one_c() -> TestResult { - // Init - let init = Cleanup::new(); - - // Encrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("encrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(BOB_PUBKEY) - .pipe_in(TESTFILE_ABCD) - .pipe_out(&temp_file("message.bob.c4gh")) - .succeeds(); - - // Rearrange - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("rearrange") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--range") - .arg("65535-131074") - .pipe_in(&temp_file("message.bob.c4gh")) - .pipe_out(&temp_file("message.bob.abbbc.c4gh")) - .succeeds(); - - // Reencrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", BOB_PASSPHRASE) - .arg("reencrypt") - .arg("--sk") - .arg(BOB_SECKEY) - .arg("--recipient_pk") - .arg(ALICE_PUBKEY) - .pipe_in(&temp_file("message.bob.abbbc.c4gh")) - .pipe_out(&temp_file("message.abbbc.c4gh")) - .succeeds(); - - // Decrypt - CommandUnderTest::new() - .env("C4GH_PASSPHRASE", ALICE_PASSPHRASE) - .arg("decrypt") - .arg("--sk") - .arg(ALICE_SECKEY) - .pipe_in(&temp_file("message.abbbc.c4gh")) - .pipe_out(&temp_file("message.abbbc.received")) - .succeeds(); - - // Compare - equal(TESTFILE_ABBBC, &temp_file("message.abbbc.received")); - - // Cleanup - drop(init); - - Ok(()) -} diff --git a/tests/testfiles/alice.pub b/tests/testfiles/alice.pub deleted file mode 100644 index 0dfe3c2..0000000 --- a/tests/testfiles/alice.pub +++ /dev/null @@ -1,3 +0,0 @@ ------BEGIN CRYPT4GH PUBLIC KEY----- -oyERnWAhzV4MAh9XIk0xD4C+nNp2tpLUiWtQoVS/xB4= ------END CRYPT4GH PUBLIC KEY----- diff --git a/tests/testfiles/alice.sec b/tests/testfiles/alice.sec deleted file mode 100644 index 3e9f752..0000000 --- a/tests/testfiles/alice.sec +++ /dev/null @@ -1,3 +0,0 @@ ------BEGIN ENCRYPTED PRIVATE KEY----- -YzRnaC12MQAGYmNyeXB0ABQAAABk8Kn90WJVzJBevxN4980aWwARY2hhY2hhMjBfcG9seTEzMDUAPBdXfpV1zOcMg5EJRlGNpKZXT4PXM2iraMGCyomRQqWaH5iBGmJXU/JROPsyoX5nqmNo8oxANvgDi1hqZQ== ------END ENCRYPTED PRIVATE KEY----- diff --git a/tests/testfiles/bob.pub b/tests/testfiles/bob.pub deleted file mode 100644 index 0951cc9..0000000 --- a/tests/testfiles/bob.pub +++ /dev/null @@ -1,3 +0,0 @@ ------BEGIN CRYPT4GH PUBLIC KEY----- -JXGe7vpNZpWEhsxrIE/h83xst7sQ+2INpaoiGjtLIDg= ------END CRYPT4GH PUBLIC KEY----- diff --git a/tests/testfiles/bob.sec b/tests/testfiles/bob.sec deleted file mode 100644 index e6d0106..0000000 --- a/tests/testfiles/bob.sec +++ /dev/null @@ -1,3 +0,0 @@ ------BEGIN ENCRYPTED PRIVATE KEY----- -YzRnaC12MQAGYmNyeXB0ABQAAABkb1LLjyLNrcL4IgMD+NuDDQARY2hhY2hhMjBfcG9seTEzMDUAPFfaFm7bJc+pr6IRezakf5AsP7HTZnVfhSBt7XIKQcJBJY/yrPSfLxLvPMY4Edu4r0hyJTX2CNqR7wmwYg== ------END ENCRYPTED PRIVATE KEY----- diff --git a/tests/testfiles/testfile.abbbc b/tests/testfiles/testfile.abbbc deleted file mode 100644 index 9037c30..0000000 --- a/tests/testfiles/testfile.abbbc +++ /dev/null @@ -1 +0,0 @@ -abbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb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\ No newline at end of file diff --git a/tests/testfiles/testfile.abcd b/tests/testfiles/testfile.abcd deleted file mode 100644 index a2d9df0..0000000 --- a/tests/testfiles/testfile.abcd +++ /dev/null @@ -1 +0,0 @@ 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