48 lines
2.4 KiB
Markdown
48 lines
2.4 KiB
Markdown
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# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [0.1.0] - 2025-03-07
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### Added
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- SM2 elliptic curve cryptography (GB/T 32918.1-5-2016)
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- Key generation, digital signature (with Z-value), public key encryption/decryption
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- Complete addition formulas for constant-time point operations
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- Fixed-window (w=4) base point scalar multiplication with precomputed table
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- Mixed Jacobian-Affine addition for optimized verification (Shamir's trick)
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- Point compression/decompression (GB/T 32918.1 section 4.2.10)
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- SM3 cryptographic hash (GB/T 32905-2016)
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- Streaming and one-shot hashing API
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- HMAC-SM3 with automatic key material zeroization
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- SM4 block cipher (GB/T 32907-2016)
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- Boolean circuit bitslice S-box (cache-timing resistant)
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- 8 modes of operation: ECB, CBC, OFB, CFB, CTR, GCM, CCM, XTS
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- GCM/CCM authenticated encryption with constant-time tag verification
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- SM9 identity-based cryptography (GB/T 38635.1-2-2020)
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- BN256 pairing (optimal Ate with Miller loop + final exponentiation)
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- Fp12 tower extension: Fp -> Fp2(u^2+2) -> Fp6(v^3-u) -> Fp12(w^2-v)
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- Identity-based signing and verification
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- Identity-based encryption and decryption
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- Unified `Error` enum with `Display` and conditional `std::error::Error` impl
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- `no_std` support with optional `alloc` and `std` features
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- `#![forbid(unsafe_code)]` enforced at crate level
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- Automatic private key zeroization via `zeroize::ZeroizeOnDrop`
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- GB/T standard test vectors for all algorithms
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### Security
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- GCM `gf128_mul`: replaced secret-dependent `if` branches with mask arithmetic
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- SM2 `is_infinity`: replaced short-circuit `Iterator::all` with `ConstantTimeEq`
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- SM2 `add`: replaced 3 conditional branches with complete addition formulas + `conditional_select`
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- SM2 `double`: replaced `if is_infinity()` with `conditional_select`
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- HMAC-SM3: added `zeroize` for `k_pad`/`ipad`/`opad` key material on stack
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- CCM: reject AAD > 510 bytes instead of silently skipping
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- XTS: reject non-16-byte-aligned input instead of silently truncating
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- SM9 `hash_to_range`: replaced variable-iteration `while` loop with constant-time conditional select
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[0.1.0]: https://github.com/aspect-building/libsmx/releases/tag/v0.1.0
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