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authorAlex Xu (Hello71) <alex_y_xu@yahoo.ca>2018-08-15 11:26:39 -0400
committerAlex Xu (Hello71) <alex_y_xu@yahoo.ca>2018-08-15 11:26:39 -0400
commit94d6b7954dc5b7c98171095b56b15ed695923bb5 (patch)
tree97dd840beed1dcc185723c1bbdd881828b37ad49 /sha2.c
parentce34bf86fbdc5471493a39033f7f09d9ae37da6d (diff)
downloadrandom-seed-94d6b7954dc5b7c98171095b56b15ed695923bb5.tar.xz
random-seed-94d6b7954dc5b7c98171095b56b15ed695923bb5.zip
Move source files to src
Diffstat (limited to 'sha2.c')
-rw-r--r--sha2.c204
1 files changed, 0 insertions, 204 deletions
diff --git a/sha2.c b/sha2.c
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-/*
- * FIPS 180-2 SHA-224/256/384/512 implementation
- * Last update: 02/02/2007
- * Issue date: 04/30/2005
- *
- * Copyright (C) 2013, Con Kolivas <kernel@kolivas.org>
- * Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch>
- * 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.
- * 3. Neither the name of the project nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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 <string.h>
-
-#include "sha2.h"
-
-#define UNPACK32(x, str) \
-{ \
- *((str) + 3) = (uint8_t) ((x) ); \
- *((str) + 2) = (uint8_t) ((x) >> 8); \
- *((str) + 1) = (uint8_t) ((x) >> 16); \
- *((str) + 0) = (uint8_t) ((x) >> 24); \
-}
-
-#define PACK32(str, x) \
-{ \
- *(x) = ((uint32_t) *((str) + 3) ) \
- | ((uint32_t) *((str) + 2) << 8) \
- | ((uint32_t) *((str) + 1) << 16) \
- | ((uint32_t) *((str) + 0) << 24); \
-}
-
-#define SHA256_SCR(i) \
-{ \
- w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
- + SHA256_F3(w[i - 15]) + w[i - 16]; \
-}
-
-static uint32_t sha256_h0[8] =
- {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
- 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
-
-uint32_t sha256_k[64] =
- {0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
- 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
- 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
- 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
- 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
- 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
- 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
- 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
- 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
- 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
- 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
- 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
- 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
- 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
- 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
- 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2};
-
-/* SHA-256 functions */
-
-void sha256_transf(sha256_ctx *ctx, const unsigned char *message,
- unsigned int block_nb)
-{
- uint32_t w[64];
- uint32_t wv[8];
- uint32_t t1, t2;
- const unsigned char *sub_block;
- int i;
-
- int j;
-
- for (i = 0; i < (int) block_nb; i++) {
- sub_block = message + (i << 6);
-
- for (j = 0; j < 16; j++) {
- PACK32(&sub_block[j << 2], &w[j]);
- }
-
- for (j = 16; j < 64; j++) {
- SHA256_SCR(j);
- }
-
- for (j = 0; j < 8; j++) {
- wv[j] = ctx->h[j];
- }
-
- for (j = 0; j < 64; j++) {
- t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6])
- + sha256_k[j] + w[j];
- t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
- wv[7] = wv[6];
- wv[6] = wv[5];
- wv[5] = wv[4];
- wv[4] = wv[3] + t1;
- wv[3] = wv[2];
- wv[2] = wv[1];
- wv[1] = wv[0];
- wv[0] = t1 + t2;
- }
-
- for (j = 0; j < 8; j++) {
- ctx->h[j] += wv[j];
- }
- }
-}
-
-void sha256(const unsigned char *message, unsigned int len, unsigned char *digest)
-{
- sha256_ctx ctx;
-
- sha256_init(&ctx);
- sha256_update(&ctx, message, len);
- sha256_final(&ctx, digest);
-}
-
-void sha256_init(sha256_ctx *ctx)
-{
- memcpy(ctx->h, sha256_h0, sizeof(uint32_t)*8);
- ctx->len = 0;
- ctx->tot_len = 0;
-}
-
-void sha256_update(sha256_ctx *ctx, const unsigned char *message,
- unsigned int len)
-{
- unsigned int block_nb;
- unsigned int new_len, rem_len, tmp_len;
- const unsigned char *shifted_message;
-
- tmp_len = SHA256_BLOCK_SIZE - ctx->len;
- rem_len = len < tmp_len ? len : tmp_len;
-
- memcpy(&ctx->block[ctx->len], message, rem_len);
-
- if (ctx->len + len < SHA256_BLOCK_SIZE) {
- ctx->len += len;
- return;
- }
-
- new_len = len - rem_len;
- block_nb = new_len / SHA256_BLOCK_SIZE;
-
- shifted_message = message + rem_len;
-
- sha256_transf(ctx, ctx->block, 1);
- sha256_transf(ctx, shifted_message, block_nb);
-
- rem_len = new_len % SHA256_BLOCK_SIZE;
-
- memcpy(ctx->block, &shifted_message[block_nb << 6],
- rem_len);
-
- ctx->len = rem_len;
- ctx->tot_len += (block_nb + 1) << 6;
-}
-
-void sha256_final(sha256_ctx *ctx, unsigned char *digest)
-{
- unsigned int block_nb;
- unsigned int pm_len;
- unsigned int len_b;
-
- int i;
-
- block_nb = (1 + ((SHA256_BLOCK_SIZE - 9)
- < (ctx->len % SHA256_BLOCK_SIZE)));
-
- len_b = (ctx->tot_len + ctx->len) << 3;
- pm_len = block_nb << 6;
-
- memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
- ctx->block[ctx->len] = 0x80;
- UNPACK32(len_b, ctx->block + pm_len - 4);
-
- sha256_transf(ctx, ctx->block, block_nb);
-
- for (i = 0 ; i < 8; i++) {
- UNPACK32(ctx->h[i], &digest[i << 2]);
- }
-}