chacha20

Added

• ChaCha20LegacyCore type and Nonce type alias (#570)

Added

• ChaCha20LegacyCore type and Nonce type alias (#570)

Added

• rand_core v0.10 support (#333, #513)
• 64-bit counter support (#439)
• {get,set}_block_pos inherent methods (#516)
• AVX-512 backend - requires --cfg chacha20_avx512 to enable (#477)
• Inherent methods for RNG state (de)serialization (#541)

Changed

• Bump cipher from 0.4 to 0.5 - replaces generic-array with
  hybrid-array (#338, #521)
• Edition changed to 2024 and MSRV bumped to 1.85 (#397)
• Relax MSRV policy and allow MSRV bumps in patch releases
• Bump cpufeatures to v0.3 (#530)
• --cfg chacha20_backend="..." replaces chacha20_force* (#520)
  • chacha20_force_avx2 => chacha20_backend="avx2"
  • chacha20_force_avx512 => chacha20_backend="avx512"
  • chacha20_force_soft => chacha20_backend="soft"
  • chacha20_force_sse2 => chacha20_backend="sse2"

Removed

• chacha20_force_neon cfg attribute - now on-by-default for supported
  targets (#361)
• std feature (#397)
• Clone impls (#462)

Added

• rand_core v0.10 support (#333, #513)
• 64-bit counter support (#439)
• {get,set}_block_pos inherent methods (#516)
• AVX-512 backend - requires --cfg chacha20_avx512 to enable (#477)
• Inherent methods for RNG state (de)serialization (#541)

Changed

• Bump cipher from 0.4 to 0.5 - replaces generic-array with hybrid-array (#338, #521)
• Edition changed to 2024 and MSRV bumped to 1.85 (#397)
• Relax MSRV policy and allow MSRV bumps in patch releases
• Bump cpufeatures to v0.3 (#530)
• --cfg chacha20_backend="..." replaces previous chacha20_force* (#520)
  • chacha20_force_avx2 => chacha20_backend="avx2"
  • chacha20_force_avx512 => chacha20_backend="avx512"
  • chacha20_force_soft => chacha20_backend="soft"
  • chacha20_force_sse2 => chacha20_backend="sse2"

Removed

• chacha20_force_neon cfg attribute - now on-by-default for supported targets (#361)
• std feature (#397)
• Clone impls (#462)

Includes #529 which removed StreamId and changed Seed to a type
alias, which are both breaking changes.

Hopefully this is the last rc before a final release

This should be a true "release candidate" in that the only change we
expect in a final release is a bump to cpufeatures v0.3.

This release includes --cfg chacha20_backend="..." changes in #520, as
well as the opt-in AVX-512 backend that can be enabled with --cfg chacha20_avx512, and also bumps the cipher crate to v0.5, the stable
release.

Includes rand_core v0.10 upgrade

Also releases chacha20 v0.10.0-rc.9

This includes the (Try)RngCore => (Try)Rng changes

Added

• NEON support via chacha20_force_neon cfg attribute (#310, #317)

Added

• chacha20_force_soft, chacha20_force_sse2, and chacha20_force_avx2 configuration flags (#293)

Changed

• Bump cipher dependency to v0.4 (#276)

Fixed

• Minimal versions build (#290)

Removed

• neon, force-soft, expose-core, hchacha, legacy, and rng features (#276, #293)

Changed

• Unpin zeroize dependency (#301)

Added

• NEON implementation for aarch64 (#274)

Added

• SSE2 autodetection support (#270)

Changed

• AVX2 performance improvements (#267, #267)
• MSRV 1.51+ (#267)
• Lock to zeroize <1.5 (#269)

Removed

• xchacha feature: all XChaCha* types are now available by-default (#271)

Changed

• Improve AVX2 performance (#261)
• Bump cpufeatures to v0.2 (#265)

Changed

• Pin zeroize dependency to v1.3 (#256)

Added

• hchacha feature (#234)

Added

• AVX2 detection; MSRV 1.49+ (#200, #212)
• XChaCha8 and XChaCha12 (#215)

Changed

• Full 64-bit counters (#217)
• Bump cipher crate dependency to v0.3 release (#226)

Fixed

• rng feature on big endian platforms (#202)
• Stream-length overflow check (#216)

Removed

• Clone impls on RNGs (#220)

Changed

• Rename Cipher to ChaCha (#177)
• Replace block-cipher/stream-cipher with cipher crate (#177)

Changed

• Bump stream-cipher dependency to v0.7 (#161, #164)

Changed

• Documentation improvements (#153, #154, #155)

Added

• Documentation improvements (#149)
• Key, Nonce, XNonce, and LegacyNonce type aliases (#147)

Fixed

• Links in documentation (#142)

Changed

• Upgrade to the stream-cipher v0.4 crate (#121, #138)

Fixed

• Avoid accidental alloc and std linking (#105)

Changed

• Replace macros with Rounds trait + generics (#100)

Fixed

• Fix warnings when building with rng feature alone (#99)

Added

• CryptoRng marker on all ChaCha*Rng types (#91)

Added

• Parallelize AVX2 backend (#87)
• Benchmark for ChaCha20Rng (#87)

Fixed

• Fix broken buffering logic (#86)

NOTE: This release was yanked due to a showstopper bug in the newly added buffering logic which when seeking in the keystream could result in plaintexts being clobbered with the keystream instead of XOR'd correctly.

The bug was addressed in v0.3.1 ([#86]).

Added

• AVX2 accelerated implementation (#83)
• ChaCha8 and ChaCha20 reduced round variants (#84)

Changed

• Simplify portable implementation (#76)
• Make 2018 edition crate; MSRV 1.34+ (#77)
• Replace salsa20-core dependency with ctr-derived buffering (#81)

Removed

• byteorder dependency (#80)

Security

• Ensure block counter < MAX_BLOCKS (#68)

Added

• SSE2 accelerated implementation (#61)

Added

• Add MAX_BLOCKS and BLOCK_SIZE constants (#47)

Added

• impl SyncStreamCipher (#39)
• XChaCha20 (#36)
• Support for 12-byte nonces ala RFC 8439 (#19)

Changed

• Refactor around a ctr-like type (#44)
• Extract and encapsulate Cipher type (#43)
• Switch tests to use new_sync_test! (#42)
• Refactor into ChaCha20 and ChaCha20Legacy (#25)

Fixed

• Fix zeroize cargo feature (#21)
• Fix broken Cargo feature attributes (#21)

• Initial release