Part 7: Stream cipher traits, CFB as a stream cipher, and new CFB8 and CTR modes - #113

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dghgit wants to merge 72 commits into

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feature/stream-cipher

Commits on Sep 6, 2026

sha2: partial-bit messages, compile-time IVs, CAVP SHAVS tests (PR #88)
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31affff
sha3: partial-byte fixes, CAVP SHA3VS tests, mem-usage bench, release notes (PR #87)
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sha2, hmac: add SHA-512/224 and SHA-512/256 (FIPS 180-4 s. 5.3.6) and their HMAC variants
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rng: use core::fmt in hash_drbg80090a.rs; the only part of PRs #92-#95 not already on this branch
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sm3: add bouncycastle-sm3 (GB/T 32905-2016) and HMAC-SM3 with factory and CLI wiring (PR #89)
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Partial bytes follow ASN.1 BIT STRING order (X.690 s. 8.6.2): message bits in the MSBs, unused low bits ignored
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release notes: SM3 partial bytes follow the ASN.1 BIT STRING order like the other hashes
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sha2, sm3: document the surviving cargo-mutants equivalences at their sites
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core: split BlockCipher into block-aligned BlockCipherEncryptor/Decryptor with multi-block and one-shot methods (PR #107)
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aes-lowmemory: add bouncycastle-aes-lowmemory, a constant-time, table-free bit-sliced AES permutation (PR #105)
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modes: add BlockPermutation trait, bouncycastle-modes with AES CBC, and aes*-cbc CLI subcommands (PR #106)
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padding: add Padding trait and bouncycastle-padding (PKCS7, PaddedEncryptor/PaddedDecryptor) (PR #97)
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core, modes, aes-lowmemory: in-place block cipher API with compile-time lengths, AES_CBC_* aliases, simpler CLI (PR #109)
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modes: add AES CFB128 mode with AES_CFB_* aliases, aes*-cfb CLI subcommands and shared block-mode CLI (PR #111)
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core: ElectronicCodeBook (was BlockPermutation), slice block hooks, blocks8, SymmetricCipherEncryptor/Decryptor (from feature/sm4); CFB follows suit
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modes: add Ecb (SP 800-38A Sec 6.1) with AES_ECB_* aliases and aes*-ecb CLI subcommands; block-mode CLI generic over INIT_DATA_LEN
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padding: add NoPadding (errors when asked to pad) with Padding::ALWAYS_PADS; SymmetricCipherEncryptor::do_final reports its output length
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skills: add commit-range-report, a Markdown report of a commit range with API changes and per-commit summaries
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a1c4e41

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