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https://github.com/luxfi/pqclean.git
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100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
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/*
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* This file was originally licensed
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* under Apache 2.0 (https://www.apache.org/licenses/LICENSE-2.0.html) or
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* public domain at https://github.com/pq-crystals/dilithium/tree/master/ref
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*
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* We offer
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* CC0 1.0 Universal or the following MIT License for this file.
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* You may freely choose one of them that applies.
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*
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* MIT License
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*
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* Copyright (c) 2023: Hanno Becker, Vincent Hwang, Matthias J. Kannwischer, Bo-Yin Yang, and Shang-Yi Yang
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "fips202.h"
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#include "params.h"
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#include "symmetric.h"
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#include <stdint.h>
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void dilithium_shake128_stream_init(shake128incctx *state, const uint8_t seed[SEEDBYTES], uint16_t nonce) {
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uint8_t t[2];
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t[0] = (uint8_t) nonce;
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t[1] = (uint8_t) (nonce >> 8);
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shake128_inc_init(state);
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shake128_inc_absorb(state, seed, SEEDBYTES);
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shake128_inc_absorb(state, t, 2);
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shake128_inc_finalize(state);
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}
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void dilithium_shake256_stream_init(shake256incctx *state, const uint8_t seed[CRHBYTES], uint16_t nonce) {
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uint8_t t[2];
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t[0] = (uint8_t) nonce;
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t[1] = (uint8_t) (nonce >> 8);
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shake256_inc_init(state);
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shake256_inc_absorb(state, seed, CRHBYTES);
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shake256_inc_absorb(state, t, 2);
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shake256_inc_finalize(state);
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}
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void dilithium_shake128x2_stream_init(keccakx2_state *state,
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const uint8_t seed[SEEDBYTES],
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uint16_t nonce1, uint16_t nonce2) {
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unsigned int i;
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uint8_t extseed1[SEEDBYTES + 2 + 14];
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uint8_t extseed2[SEEDBYTES + 2 + 14];
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for (i = 0; i < SEEDBYTES; i++) {
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extseed1[i] = seed[i];
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extseed2[i] = seed[i];
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}
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extseed1[SEEDBYTES] = (uint8_t) nonce1;
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extseed1[SEEDBYTES + 1] = (uint8_t) (nonce1 >> 8);
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extseed2[SEEDBYTES ] = (uint8_t) nonce2;
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extseed2[SEEDBYTES + 1] = (uint8_t) (nonce2 >> 8);
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shake128x2_absorb(state, extseed1, extseed2, SEEDBYTES + 2);
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}
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void dilithium_shake256x2_stream_init(keccakx2_state *state,
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const uint8_t seed[CRHBYTES],
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uint16_t nonce1, uint16_t nonce2) {
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unsigned int i;
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uint8_t extseed1[CRHBYTES + 2 + 14];
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uint8_t extseed2[CRHBYTES + 2 + 14];
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for (i = 0; i < CRHBYTES; i++) {
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extseed1[i] = seed[i];
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extseed2[i] = seed[i];
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}
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extseed1[CRHBYTES] = (uint8_t) nonce1;
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extseed1[CRHBYTES + 1] = (uint8_t) (nonce1 >> 8);
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extseed2[CRHBYTES ] = (uint8_t) nonce2;
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extseed2[CRHBYTES + 1] = (uint8_t) (nonce2 >> 8);
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shake256x2_absorb(state, extseed1, extseed2, CRHBYTES + 2);
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}
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