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fed-prims: Phase B — SHA3-256 (Keccak-f[1600]), pure OCaml, 4 NIST vectors
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Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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giles
2026-05-18 15:43:51 +00:00
parent 19932a42a9
commit 451bd4be62
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plans/fed-sx-host-primitives.md
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@@ -77,7 +77,7 @@ check** → tests → commit → tick box → Progress-log line → push.
- sha512("abc") = `ddaf35a1…2a9ac94f…`
- **Acceptance:** vectors pass; WASM build links; OCaml conformance unchanged.
### Phase B — SHA-3 / Keccak-256, pure OCaml
### Phase B — SHA-3 / Keccak-256, pure OCaml ✅ DONE
- Keccak-f[1600] + SHA3-256 padding. Primitive `crypto-sha3-256`.
- Tests: sha3-256("") = `a7ffc6f8…0f8434a`; sha3-256("abc") = `3a985da7…11431532`.
- **Acceptance:** NIST SHA-3 vectors pass; WASM links.
@@ -205,6 +205,10 @@ printf '(epoch 1)\n(crypto-sha256 "abc")\n' | \
_Newest first._
- 2026-05-18 — Phase B: pure-OCaml `lib/sx_sha3.ml` (Keccak-f[1600] +
SHA-3 pad, domain 0x06), primitive `crypto-sha3-256`. 4 NIST FIPS 202
vectors pass (empty/abc/896-bit + 1600-bit 0xa3 multi-block). WASM boot
green with new lib module; Erlang conformance 530/530; run_tests +4.
- 2026-05-18 — Phase A: pure-OCaml `lib/sx_sha2.ml` (SHA-256 + SHA-512),
primitives `crypto-sha256`/`crypto-sha512`. 7 NIST FIPS 180-4 vectors pass
(empty/abc/896-bit/1M-'a' for sha256; empty/abc/896-bit for sha512). WASM