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zeekay
cc84032371
Replaces the stub backend (ErrBackendNotWired) with a working byte-
for-byte NIST-compatible HQC implementation. Build tag hqc_pqclean
activates the cgo path; default builds remain stub for portability.
Vendored:
- PQClean HQC-128/192/256 clean reference C (2023-04-30 NIST
submission), public domain
- PQClean shared fips202 (SHA-3 / SHAKE)
- Per-mode/per-source shim TUs (36 total) to keep PQClean's
static helpers isolated and avoid duplicate-symbol collisions
- randombytes_shim.c wiring PQClean's randombytes() to a Go-side
io.Reader callback, mutex-protected for concurrent dispatch
Tests:
- TestKAT_HQC128/192/256 — all three NIST KAT vectors verified
byte-for-byte against META.yml nistkat-sha256
- TestRoundTrip_AllModes — keygen → encap → decap roundtrip,
shared secrets byte-equal in all 3 modes
- TestDeterminism_AllModes — same seed produces identical ct/ss
(load-bearing for the precompile's on-chain determinism)
- -race clean
Correction: ciphertext sizes updated from 4481/9026/14469 (older
HQC round-3 listing) to PQClean's 4433/8978/14421 (2023-04-30 NIST
submission); the prior numbers would have failed round-trip with
a 48-byte mismatch.
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
#include "code.h"
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#include "parameters.h"
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#include "reed_muller.h"
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#include "reed_solomon.h"
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#include <stdint.h>
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/**
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* @file code.c
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* @brief Implementation of concatenated code
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*/
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/**
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*
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* @brief Encoding the message m to a code word em using the concatenated code
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*
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* First we encode the message using the Reed-Solomon code, then with the duplicated Reed-Muller code we obtain
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* a concatenated code word.
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*
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* @param[out] em Pointer to an array that is the tensor code word
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* @param[in] m Pointer to an array that is the message
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*/
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void PQCLEAN_HQC256_CLEAN_code_encode(uint64_t *em, const uint8_t *m) {
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uint8_t tmp[VEC_N1_SIZE_BYTES] = {0};
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PQCLEAN_HQC256_CLEAN_reed_solomon_encode(tmp, m);
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PQCLEAN_HQC256_CLEAN_reed_muller_encode(em, tmp);
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}
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/**
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* @brief Decoding the code word em to a message m using the concatenated code
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*
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* @param[out] m Pointer to an array that is the message
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* @param[in] em Pointer to an array that is the code word
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*/
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void PQCLEAN_HQC256_CLEAN_code_decode(uint8_t *m, const uint64_t *em) {
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uint8_t tmp[VEC_N1_SIZE_BYTES] = {0};
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PQCLEAN_HQC256_CLEAN_reed_muller_decode(tmp, em);
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PQCLEAN_HQC256_CLEAN_reed_solomon_decode(m, tmp);
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}
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