Con Kolivas
11 years ago
7 changed files with 449 additions and 5 deletions
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|
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/*
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* FIPS 180-2 SHA-224/256/384/512 implementation |
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* Last update: 02/02/2007 |
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* Issue date: 04/30/2005 |
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* |
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* Copyright (C) 2013, Con Kolivas <kernel@kolivas.org> |
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* Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the project nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include <string.h> |
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#include <stdint.h> |
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#include "sha2.h" |
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#define UNPACK32(x, str) \ |
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{ \
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*((str) + 3) = (uint8_t) ((x) ); \
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*((str) + 2) = (uint8_t) ((x) >> 8); \
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*((str) + 1) = (uint8_t) ((x) >> 16); \
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*((str) + 0) = (uint8_t) ((x) >> 24); \
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} |
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#define PACK32(str, x) \ |
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{ \
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*(x) = ((uint32_t) *((str) + 3) ) \
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| ((uint32_t) *((str) + 2) << 8) \
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| ((uint32_t) *((str) + 1) << 16) \
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| ((uint32_t) *((str) + 0) << 24); \
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} |
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#define SHA256_SCR(i) \ |
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{ \
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w[i] = SHA256_F4(w[i - 2]) + w[i - 7] \
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+ SHA256_F3(w[i - 15]) + w[i - 16]; \
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} |
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uint32_t sha256_h0[8] = |
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{0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, |
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0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19}; |
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uint32_t sha256_k[64] = |
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{0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, |
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0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, |
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, |
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0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, |
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, |
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0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, |
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, |
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0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, |
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, |
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0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, |
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, |
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0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, |
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, |
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0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, |
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, |
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0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2}; |
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|
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/* SHA-256 functions */ |
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void sha256_transf(sha256_ctx *ctx, const unsigned char *message, |
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unsigned int block_nb) |
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{ |
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uint32_t w[64]; |
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uint32_t wv[8]; |
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uint32_t t1, t2; |
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const unsigned char *sub_block; |
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int i; |
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int j; |
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for (i = 0; i < (int) block_nb; i++) { |
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sub_block = message + (i << 6); |
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for (j = 0; j < 16; j++) { |
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PACK32(&sub_block[j << 2], &w[j]); |
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} |
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for (j = 16; j < 64; j++) { |
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SHA256_SCR(j); |
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} |
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for (j = 0; j < 8; j++) { |
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wv[j] = ctx->h[j]; |
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} |
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for (j = 0; j < 64; j++) { |
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t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) |
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+ sha256_k[j] + w[j]; |
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t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]); |
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wv[7] = wv[6]; |
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wv[6] = wv[5]; |
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wv[5] = wv[4]; |
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wv[4] = wv[3] + t1; |
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wv[3] = wv[2]; |
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wv[2] = wv[1]; |
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wv[1] = wv[0]; |
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wv[0] = t1 + t2; |
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} |
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for (j = 0; j < 8; j++) { |
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ctx->h[j] += wv[j]; |
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} |
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} |
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} |
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void sha256(const unsigned char *message, unsigned int len, unsigned char *digest) |
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{ |
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sha256_ctx ctx; |
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sha256_init(&ctx); |
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sha256_update(&ctx, message, len); |
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sha256_final(&ctx, digest); |
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} |
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void sha256_init(sha256_ctx *ctx) |
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{ |
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int i; |
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for (i = 0; i < 8; i++) { |
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ctx->h[i] = sha256_h0[i]; |
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} |
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ctx->len = 0; |
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ctx->tot_len = 0; |
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} |
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void sha256_update(sha256_ctx *ctx, const unsigned char *message, |
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unsigned int len) |
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{ |
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unsigned int block_nb; |
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unsigned int new_len, rem_len, tmp_len; |
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const unsigned char *shifted_message; |
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tmp_len = SHA256_BLOCK_SIZE - ctx->len; |
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rem_len = len < tmp_len ? len : tmp_len; |
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memcpy(&ctx->block[ctx->len], message, rem_len); |
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if (ctx->len + len < SHA256_BLOCK_SIZE) { |
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ctx->len += len; |
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return; |
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} |
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new_len = len - rem_len; |
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block_nb = new_len / SHA256_BLOCK_SIZE; |
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shifted_message = message + rem_len; |
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sha256_transf(ctx, ctx->block, 1); |
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sha256_transf(ctx, shifted_message, block_nb); |
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rem_len = new_len % SHA256_BLOCK_SIZE; |
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memcpy(ctx->block, &shifted_message[block_nb << 6], |
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rem_len); |
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ctx->len = rem_len; |
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ctx->tot_len += (block_nb + 1) << 6; |
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} |
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void sha256_final(sha256_ctx *ctx, unsigned char *digest) |
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{ |
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unsigned int block_nb; |
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unsigned int pm_len; |
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unsigned int len_b; |
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int i; |
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block_nb = (1 + ((SHA256_BLOCK_SIZE - 9) |
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< (ctx->len % SHA256_BLOCK_SIZE))); |
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len_b = (ctx->tot_len + ctx->len) << 3; |
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pm_len = block_nb << 6; |
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memset(ctx->block + ctx->len, 0, pm_len - ctx->len); |
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ctx->block[ctx->len] = 0x80; |
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UNPACK32(len_b, ctx->block + pm_len - 4); |
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sha256_transf(ctx, ctx->block, block_nb); |
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for (i = 0 ; i < 8; i++) { |
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UNPACK32(ctx->h[i], &digest[i << 2]); |
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} |
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} |
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@ -0,0 +1,69 @@
|
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/*
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* FIPS 180-2 SHA-224/256/384/512 implementation |
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* Last update: 02/02/2007 |
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* Issue date: 04/30/2005 |
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* |
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* Copyright (C) 2013, Con Kolivas <kernel@kolivas.org> |
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* Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 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 |
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* documentation and/or other materials provided with the distribution. |
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* 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. |
||||
* |
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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* 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 |
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* 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 |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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#include "config.h" |
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#ifndef SHA2_H |
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#define SHA2_H |
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#define SHA256_DIGEST_SIZE ( 256 / 8) |
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#define SHA256_BLOCK_SIZE ( 512 / 8) |
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#define SHFR(x, n) (x >> n) |
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#define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n))) |
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#define CH(x, y, z) ((x & y) ^ (~x & z)) |
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#define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z)) |
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#define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22)) |
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#define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25)) |
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#define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3)) |
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#define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10)) |
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typedef struct { |
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unsigned int tot_len; |
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unsigned int len; |
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unsigned char block[2 * SHA256_BLOCK_SIZE]; |
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uint32_t h[8]; |
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} sha256_ctx; |
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uint32_t sha256_k[64]; |
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void sha256_init(sha256_ctx * ctx); |
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void sha256_update(sha256_ctx *ctx, const unsigned char *message, |
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unsigned int len); |
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void sha256_final(sha256_ctx *ctx, unsigned char *digest); |
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void sha256(const unsigned char *message, unsigned int len, |
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unsigned char *digest); |
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#endif /* !SHA2_H */ |
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