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zeekay
9e6a6cab8c
Byte-preserving de-dup: Corona's SP 800-185 transcript surface
(hash/sha3.go; deletes the local hash/sp800_185.go) and
ComputeLagrangeCoefficients (primitives/shamir.go) now consume the
shared github.com/luxfi/mlwe base — the single Module-LWE primitive
surface for the Lux stack (Corona + Pulsar).
Routed onto mlwe:
- hash/sha3.go: cSHAKE256 / KMAC256 / TupleHash256 / EncodeString
-> github.com/luxfi/mlwe/transcript. Corona retains ONLY its
domain-separation tags; the byte encodings live in mlwe/transcript.
- primitives/shamir.go: ComputeLagrangeCoefficients delegates the
field arithmetic + interpolation to github.com/luxfi/mlwe/share
(NewPrimeField + Lagrange at point 0); Corona keeps the adapter
that lifts each scalar into the R_q constant-term ring.Poly.
Deliberately NOT routed (byte-incompatible / audited):
- Lattigo 48-bit ring stays Lattigo (re-rolling audited Lattigo forbidden).
- The seeded Shamir deal (ShamirSecretSharing) stays Corona-specific
(its sampler is byte-incompatible with mlwe.Split).
Corona remains Module-LWE (Ringtail/Raccoon line).
Byte-parity gate: every Corona KAT oracle emits byte-identical output
old (Corona-local impls) == new (mlwe-routed). Go byte-parity is the
correctness gate; the C++ cross-runtime byte gate is a post-merge CI
confirmation (see merge commit CI-GATE note).