Author lux/crypto/blake3/ to mirror lux/crypto/keccak and lux/crypto/sha256:
- blake3.go: Hash, HashHex, HashBatch, New, NewKeyed, KeyedHash,
DeriveKey, Reader (XOF), Concat. Backed by github.com/zeebo/blake3
(BSD-3, pure Go with SSE4.1/AVX2/NEON), counted as vanilla per
CANONICAL_AUDIT.md directive.
- gpu.go: batchGPU stub matching keccak/sha256 dispatch surface; falls
through to CPU because luxfi/accel does not yet expose a real BLAKE3
kernel (its HashBlake3 currently aliases SHA-256). When accel ships
the kernel, wire it in here, no API change.
- blake3_test.go: 35/35 official BLAKE3 reference KAT vectors
(test_vectors.json embedded) for hash, keyed_hash, derive_key. Plus
batch parity, incremental==contiguous, XOF, hex, key-size validation.
- doc.go: package overview matching keccak/sha256 docs.
Closes the blake3 hard violation in CANONICAL_AUDIT.md (commit 9affea3).
blake3: pure-Go body wrapping zeebo/blake3 (already in go.mod). Three modes
(hash/keyed/derive_key) plus XOF. KAT against the official BLAKE3
test_vectors.json (35 input lengths from 0 to 102400 bytes, 4 modes each
= 140 byte-equal assertions).
poseidon: extended Sum2 wrapper with Permutation2 (raw t=2 permutation) and
Compress2 (gnark-crypto Compress contract). KAT vectors generated from
gnark-crypto v0.20.1 (default params t=2, rF=6, rP=50, d=5) for 16
permutation cases.
Both layers assert byte-equal to the published spec, no oracle indirection.
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