/*- * Copyright 2005,2007,2009 Colin Percival * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include "crypto_hash_sha256.h" #include "utils.h" #include "../../../sodium/common.h" #include #include #include #include #include static void be32enc_vect(unsigned char *dst, const uint32_t *src, size_t len) { size_t i; for (i = 0; i < len / 4; i++) { STORE32_BE(dst + i * 4, src[i]); } } static void be32dec_vect(uint32_t *dst, const unsigned char *src, size_t len) { size_t i; for (i = 0; i < len / 4; i++) { dst[i] = LOAD32_BE(src + i * 4); } } #define Ch(x, y, z) ((x & (y ^ z)) ^ z) #define Maj(x, y, z) ((x & (y | z)) | (y & z)) #define SHR(x, n) (x >> n) #define ROTR(x, n) ((x >> n) | (x << (32 - n))) #define S0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22)) #define S1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25)) #define s0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3)) #define s1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10)) #define RND(a, b, c, d, e, f, g, h, k) \ t0 = h + S1(e) + Ch(e, f, g) + k; \ t1 = S0(a) + Maj(a, b, c); \ d += t0; \ h = t0 + t1; #define RNDr(S, W, i, k) \ RND(S[(64 - i) % 8], S[(65 - i) % 8], \ S[(66 - i) % 8], S[(67 - i) % 8], \ S[(68 - i) % 8], S[(69 - i) % 8], \ S[(70 - i) % 8], S[(71 - i) % 8], \ W[i] + k) static void SHA256_Transform(uint32_t *state, const unsigned char block[64]) { uint32_t W[64]; uint32_t S[8]; uint32_t t0, t1; int i; be32dec_vect(W, block, 64); for (i = 16; i < 64; i++) { W[i] = s1(W[i - 2]) + W[i - 7] + s0(W[i - 15]) + W[i - 16]; } memcpy(S, state, 32); RNDr(S, W, 0, 0x428a2f98); RNDr(S, W, 1, 0x71374491); RNDr(S, W, 2, 0xb5c0fbcf); RNDr(S, W, 3, 0xe9b5dba5); RNDr(S, W, 4, 0x3956c25b); RNDr(S, W, 5, 0x59f111f1); RNDr(S, W, 6, 0x923f82a4); RNDr(S, W, 7, 0xab1c5ed5); RNDr(S, W, 8, 0xd807aa98); RNDr(S, W, 9, 0x12835b01); RNDr(S, W, 10, 0x243185be); RNDr(S, W, 11, 0x550c7dc3); RNDr(S, W, 12, 0x72be5d74); RNDr(S, W, 13, 0x80deb1fe); RNDr(S, W, 14, 0x9bdc06a7); RNDr(S, W, 15, 0xc19bf174); RNDr(S, W, 16, 0xe49b69c1); RNDr(S, W, 17, 0xefbe4786); RNDr(S, W, 18, 0x0fc19dc6); RNDr(S, W, 19, 0x240ca1cc); RNDr(S, W, 20, 0x2de92c6f); RNDr(S, W, 21, 0x4a7484aa); RNDr(S, W, 22, 0x5cb0a9dc); RNDr(S, W, 23, 0x76f988da); RNDr(S, W, 24, 0x983e5152); RNDr(S, W, 25, 0xa831c66d); RNDr(S, W, 26, 0xb00327c8); RNDr(S, W, 27, 0xbf597fc7); RNDr(S, W, 28, 0xc6e00bf3); RNDr(S, W, 29, 0xd5a79147); RNDr(S, W, 30, 0x06ca6351); RNDr(S, W, 31, 0x14292967); RNDr(S, W, 32, 0x27b70a85); RNDr(S, W, 33, 0x2e1b2138); RNDr(S, W, 34, 0x4d2c6dfc); RNDr(S, W, 35, 0x53380d13); RNDr(S, W, 36, 0x650a7354); RNDr(S, W, 37, 0x766a0abb); RNDr(S, W, 38, 0x81c2c92e); RNDr(S, W, 39, 0x92722c85); RNDr(S, W, 40, 0xa2bfe8a1); RNDr(S, W, 41, 0xa81a664b); RNDr(S, W, 42, 0xc24b8b70); RNDr(S, W, 43, 0xc76c51a3); RNDr(S, W, 44, 0xd192e819); RNDr(S, W, 45, 0xd6990624); RNDr(S, W, 46, 0xf40e3585); RNDr(S, W, 47, 0x106aa070); RNDr(S, W, 48, 0x19a4c116); RNDr(S, W, 49, 0x1e376c08); RNDr(S, W, 50, 0x2748774c); RNDr(S, W, 51, 0x34b0bcb5); RNDr(S, W, 52, 0x391c0cb3); RNDr(S, W, 53, 0x4ed8aa4a); RNDr(S, W, 54, 0x5b9cca4f); RNDr(S, W, 55, 0x682e6ff3); RNDr(S, W, 56, 0x748f82ee); RNDr(S, W, 57, 0x78a5636f); RNDr(S, W, 58, 0x84c87814); RNDr(S, W, 59, 0x8cc70208); RNDr(S, W, 60, 0x90befffa); RNDr(S, W, 61, 0xa4506ceb); RNDr(S, W, 62, 0xbef9a3f7); RNDr(S, W, 63, 0xc67178f2); for (i = 0; i < 8; i++) { state[i] += S[i]; } sodium_memzero((void *) W, sizeof W); sodium_memzero((void *) S, sizeof S); sodium_memzero((void *) &t0, sizeof t0); sodium_memzero((void *) &t1, sizeof t1); } static unsigned char PAD[64] = { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; static void SHA256_Pad(crypto_hash_sha256_state *state) { unsigned char len[8]; uint32_t r, plen; STORE64_BE(len, state->count); r = (state->count >> 3) & 0x3f; plen = (r < 56) ? (56 - r) : (120 - r); crypto_hash_sha256_update(state, PAD, (unsigned long long) plen); crypto_hash_sha256_update(state, len, 8); } int crypto_hash_sha256_init(crypto_hash_sha256_state *state) { static const uint32_t sha256_initstate[8] = { 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 }; state->count = (uint64_t) 0U; memcpy(state->state, sha256_initstate, sizeof sha256_initstate); return 0; } int crypto_hash_sha256_update(crypto_hash_sha256_state *state, const unsigned char *in, unsigned long long inlen) { uint32_t r; if (inlen <= 0U) { return 0; } r = (state->count >> 3) & 0x3f; state->count += (uint64_t)(inlen) << 3; if (inlen < 64 - r) { memcpy(&state->buf[r], in, inlen); return 0; } memcpy(&state->buf[r], in, 64 - r); SHA256_Transform(state->state, state->buf); in += 64 - r; inlen -= 64 - r; while (inlen >= 64) { SHA256_Transform(state->state, in); in += 64; inlen -= 64; } memcpy(state->buf, in, inlen); /* inlen < 64 */ return 0; } int crypto_hash_sha256_final(crypto_hash_sha256_state *state, unsigned char *out) { SHA256_Pad(state); be32enc_vect(out, state->state, 32); sodium_memzero((void *) state, sizeof *state); return 0; } int crypto_hash_sha256(unsigned char *out, const unsigned char *in, unsigned long long inlen) { crypto_hash_sha256_state state; crypto_hash_sha256_init(&state); crypto_hash_sha256_update(&state, in, inlen); crypto_hash_sha256_final(&state, out); return 0; }