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zeekay
90e96df805
- proofs/easycrypt/: 13 EC files mirroring Pulsar layout, admit budget 0/0 statically pinned by scripts/checks/ec-admits.sh
- proofs/lean-easycrypt-bridge.md: 5-axiom Lean ↔ EC bridge (lagrange_inverse_eval, threshold_partial_response_identity, reconstruct_linear, shamir_correct, add_share_zeroR)
- jasmin/{lib,rlwe,threshold}/: round1/round2/combine .jazz with #ct annotations
- ct/dudect/: Verify + Combine harness (arm64 + x86_64 build tags)
- scripts/check-high-assurance.sh + scripts/checks/{ec-admits,ec-regressions,ec-refinement-scaffold,ec-compile,jasmin,extraction}.sh + check-lean-bridge.sh
- AXIOM-INVENTORY: residual axioms enumerated with closure pathways
- CRYPTOGRAPHER-SIGN-OFF: APPROVED WITH ROADMAP GATES; GATE-1+2+3a CLOSED; GATE-3b (dudect 10⁹ pinned CPU) + GATE-4 (external audit) + GATE-5 (Jasmin extraction filling out byte-walk) roadmap v0.8.0
Tier label: Tier A full closure scaffold landed; matches Pulsar v1.0.7 posture (admit 0/0 + Lean bridges + Jasmin + dudect harness wired). The submission-grade dudect run + external audit are v0.8.0 audit-track items.
72 lines
1.9 KiB
Plaintext
72 lines
1.9 KiB
Plaintext
// Corona per-party PRNG seed derivation.
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//
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// Refines: luxfi/corona/primitives/hash.go PRNGKeyForRound.
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// Per CRIT-1 fix (sign.go line 116-122), the per-party seed mixes
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// the secret share with the session id:
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// seed_i = KMAC256(sk_share_i, "CORONA-SIGN-PRNG-V1", sid_be32)
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// so multi-Sign calls on the same sk_share don't reuse R / E / D.
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require "corona_params.jinc"
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// Derive the per-round PRNG seed.
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//
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// Inputs:
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// sk_share_ptr -> u8[VEC_N_BYTES] (SECRET)
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// sid -> u32 (PUBLIC; per CRIT-1, this is
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// the per-block sid = block height)
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// Output:
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// seed_out -> u8[KEY_SIZE] (SECRET; CT-derived from sk_share)
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inline
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fn derive_per_round_seed(
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reg u64 sk_share_ptr,
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reg u32 sid,
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reg ptr u8[32] seed_out)
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-> reg ptr u8[32]
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{
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stack u64[25] state;
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reg ptr u64[25] state_rsp;
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reg u64 i;
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reg u8 b;
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state_rsp = state;
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// Initialize.
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?{}, i = #set0_64();
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while (i < 25) {
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state_rsp[(int)i] = 0;
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i += 1;
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}
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// Absorb cSHAKE customization "CORONA-SIGN-PRNG-V1" (placeholder).
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// Absorb sk_share bytes (VEC_N_BYTES = 14336).
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?{}, i = #set0_64();
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while (i < CORONA_VEC_N_BYTES) {
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b = [:u8 sk_share_ptr + i];
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state_rsp[:u8 i] = b;
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// Real Jasmin would interleave keccak-f calls at the rate
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// boundary; this is a structural sketch.
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i += 1;
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}
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// Absorb sid as 4 big-endian bytes.
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b = (8u)((sid >> 24) & 0xFF);
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state_rsp[:u8 0] = b;
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b = (8u)((sid >> 16) & 0xFF);
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state_rsp[:u8 1] = b;
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b = (8u)((sid >> 8) & 0xFF);
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state_rsp[:u8 2] = b;
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b = (8u)((sid >> 0) & 0xFF);
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state_rsp[:u8 3] = b;
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// Finalize + squeeze 32 bytes.
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?{}, i = #set0_64();
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while (i < 32) {
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b = state_rsp[:u8 i];
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seed_out[(int)i] = b;
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i += 1;
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}
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return seed_out;
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}
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