sha.c updated
This commit is contained in:
kaleb-himes
parent
87431aa744
commit
aa08c17dc1
@ -2,14 +2,14 @@
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*
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* Copyright (C) 2006-2014 wolfSSL Inc.
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*
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* This file is part of CyaSSL.
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* This file is part of wolfSSL. (formerly known as CyaSSL)
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*
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* CyaSSL is free software; you can redistribute it and/or modify
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* CyaSSL is distributed in the hope that it will be useful,
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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@ -43,27 +43,377 @@
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#include <wolfcrypt/src/misc.c>
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#endif
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#ifndef HAVE_FIPS
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#ifdef STM32F2_HASH
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/*
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* STM32F2 hardware SHA1 support through the STM32F2 standard peripheral
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* library. Documentation located in STM32F2xx Standard Peripheral Library
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* document (See note in README).
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*/
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#include "stm32f2xx.h"
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#include "stm32f2xx_hash.h"
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int wc_InitSha(Sha* sha)
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{
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return InitSha(sha);
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/* STM32F2 struct notes:
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* sha->buffer = first 4 bytes used to hold partial block if needed
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* sha->buffLen = num bytes currently stored in sha->buffer
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* sha->loLen = num bytes that have been written to STM32 FIFO
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*/
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XMEMSET(sha->buffer, 0, SHA_REG_SIZE);
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sha->buffLen = 0;
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sha->loLen = 0;
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/* initialize HASH peripheral */
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HASH_DeInit();
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/* configure algo used, algo mode, datatype */
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HASH->CR &= ~ (HASH_CR_ALGO | HASH_CR_DATATYPE | HASH_CR_MODE);
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HASH->CR |= (HASH_AlgoSelection_SHA1 | HASH_AlgoMode_HASH
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| HASH_DataType_8b);
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/* reset HASH processor */
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HASH->CR |= HASH_CR_INIT;
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return 0;
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}
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int wc_ShaUpdate(Sha* sha, const byte* data, word32 len)
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{
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return ShaUpdate(sha, data, len);
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word32 i = 0;
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word32 fill = 0;
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word32 diff = 0;
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/* if saved partial block is available */
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if (sha->buffLen) {
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fill = 4 - sha->buffLen;
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/* if enough data to fill, fill and push to FIFO */
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if (fill <= len) {
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XMEMCPY((byte*)sha->buffer + sha->buffLen, data, fill);
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HASH_DataIn(*(uint32_t*)sha->buffer);
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data += fill;
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len -= fill;
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sha->loLen += 4;
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sha->buffLen = 0;
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} else {
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/* append partial to existing stored block */
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XMEMCPY((byte*)sha->buffer + sha->buffLen, data, len);
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sha->buffLen += len;
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return;
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}
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}
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/* write input block in the IN FIFO */
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for(i = 0; i < len; i += 4)
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{
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diff = len - i;
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if ( diff < 4) {
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/* store incomplete last block, not yet in FIFO */
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XMEMSET(sha->buffer, 0, SHA_REG_SIZE);
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XMEMCPY((byte*)sha->buffer, data, diff);
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sha->buffLen = diff;
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} else {
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HASH_DataIn(*(uint32_t*)data);
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data+=4;
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}
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}
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/* keep track of total data length thus far */
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sha->loLen += (len - sha->buffLen);
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return 0;
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}
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int wc_ShaFinal(Sha* sha, byte* hash)
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{
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return ShaFinal(sha, hash);
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__IO uint16_t nbvalidbitsdata = 0;
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/* finish reading any trailing bytes into FIFO */
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if (sha->buffLen) {
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HASH_DataIn(*(uint32_t*)sha->buffer);
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sha->loLen += sha->buffLen;
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}
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/* calculate number of valid bits in last word of input data */
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nbvalidbitsdata = 8 * (sha->loLen % SHA_REG_SIZE);
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/* configure number of valid bits in last word of the data */
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HASH_SetLastWordValidBitsNbr(nbvalidbitsdata);
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/* start HASH processor */
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HASH_StartDigest();
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/* wait until Busy flag == RESET */
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while (HASH_GetFlagStatus(HASH_FLAG_BUSY) != RESET) {}
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/* read message digest */
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sha->digest[0] = HASH->HR[0];
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sha->digest[1] = HASH->HR[1];
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sha->digest[2] = HASH->HR[2];
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sha->digest[3] = HASH->HR[3];
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sha->digest[4] = HASH->HR[4];
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ByteReverseWords(sha->digest, sha->digest, SHA_DIGEST_SIZE);
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XMEMCPY(hash, sha->digest, SHA_DIGEST_SIZE);
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return wc_InitSha(sha); /* reset state */
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}
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#else /* wc_ software implementation */
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#ifndef min
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static INLINE word32 min(word32 a, word32 b)
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{
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return a > b ? b : a;
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}
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#endif /* min */
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int wc_InitSha(Sha* sha)
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{
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#ifdef FREESCALE_MMCAU
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cau_sha1_initialize_output(sha->digest);
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#else
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sha->digest[0] = 0x67452301L;
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sha->digest[1] = 0xEFCDAB89L;
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sha->digest[2] = 0x98BADCFEL;
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sha->digest[3] = 0x10325476L;
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sha->digest[4] = 0xC3D2E1F0L;
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#endif
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sha->buffLen = 0;
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sha->loLen = 0;
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sha->hiLen = 0;
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return 0;
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}
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#ifndef FREESCALE_MMCAU
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#define blk0(i) (W[i] = sha->buffer[i])
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#define blk1(i) (W[(i)&15] = \
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rotlFixed(W[((i)+13)&15]^W[((i)+8)&15]^W[((i)+2)&15]^W[(i)&15],1))
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#define f1(x,y,z) ((z)^((x) &((y)^(z))))
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#define f2(x,y,z) ((x)^(y)^(z))
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#define f3(x,y,z) (((x)&(y))|((z)&((x)|(y))))
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#define f4(x,y,z) ((x)^(y)^(z))
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/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
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#define R0(v,w,x,y,z,i) (z)+= f1((w),(x),(y)) + blk0((i)) + 0x5A827999+ \
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rotlFixed((v),5); (w) = rotlFixed((w),30);
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#define R1(v,w,x,y,z,i) (z)+= f1((w),(x),(y)) + blk1((i)) + 0x5A827999+ \
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rotlFixed((v),5); (w) = rotlFixed((w),30);
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#define R2(v,w,x,y,z,i) (z)+= f2((w),(x),(y)) + blk1((i)) + 0x6ED9EBA1+ \
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rotlFixed((v),5); (w) = rotlFixed((w),30);
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#define R3(v,w,x,y,z,i) (z)+= f3((w),(x),(y)) + blk1((i)) + 0x8F1BBCDC+ \
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rotlFixed((v),5); (w) = rotlFixed((w),30);
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#define R4(v,w,x,y,z,i) (z)+= f4((w),(x),(y)) + blk1((i)) + 0xCA62C1D6+ \
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rotlFixed((v),5); (w) = rotlFixed((w),30);
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static void Transform(Sha* sha)
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{
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word32 W[SHA_BLOCK_SIZE / sizeof(word32)];
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/* Copy context->state[] to working vars */
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word32 a = sha->digest[0];
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word32 b = sha->digest[1];
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word32 c = sha->digest[2];
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word32 d = sha->digest[3];
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word32 e = sha->digest[4];
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#ifdef USE_SLOW_SHA
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word32 t, i;
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for (i = 0; i < 16; i++) {
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R0(a, b, c, d, e, i);
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t = e; e = d; d = c; c = b; b = a; a = t;
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}
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for (; i < 20; i++) {
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R1(a, b, c, d, e, i);
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t = e; e = d; d = c; c = b; b = a; a = t;
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}
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for (; i < 40; i++) {
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R2(a, b, c, d, e, i);
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t = e; e = d; d = c; c = b; b = a; a = t;
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}
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for (; i < 60; i++) {
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R3(a, b, c, d, e, i);
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t = e; e = d; d = c; c = b; b = a; a = t;
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}
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for (; i < 80; i++) {
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R4(a, b, c, d, e, i);
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t = e; e = d; d = c; c = b; b = a; a = t;
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}
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#else
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/* nearly 1 K bigger in code size but 25% faster */
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/* 4 rounds of 20 operations each. Loop unrolled. */
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R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
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R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
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R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
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R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
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R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
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R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
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R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
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R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
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R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
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R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
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R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
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R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
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R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
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R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
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R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
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R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
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R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
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R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
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R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
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R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
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#endif
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/* Add the working vars back into digest state[] */
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sha->digest[0] += a;
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sha->digest[1] += b;
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sha->digest[2] += c;
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sha->digest[3] += d;
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sha->digest[4] += e;
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}
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#endif /* FREESCALE_MMCAU */
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static INLINE void AddLength(Sha* sha, word32 len)
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{
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word32 tmp = sha->loLen;
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if ( (sha->loLen += len) < tmp)
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sha->hiLen++; /* carry low to high */
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}
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int wc_ShaUpdate(Sha* sha, const byte* data, word32 len)
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{
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/* do block size increments */
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byte* local = (byte*)sha->buffer;
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while (len) {
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word32 add = min(len, SHA_BLOCK_SIZE - sha->buffLen);
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XMEMCPY(&local[sha->buffLen], data, add);
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sha->buffLen += add;
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data += add;
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len -= add;
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if (sha->buffLen == SHA_BLOCK_SIZE) {
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#if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
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ByteReverseWords(sha->buffer, sha->buffer, SHA_BLOCK_SIZE);
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#endif
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XTRANSFORM(sha, local);
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AddLength(sha, SHA_BLOCK_SIZE);
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sha->buffLen = 0;
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}
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}
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return 0;
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}
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int wc_ShaFinal(Sha* sha, byte* hash)
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{
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byte* local = (byte*)sha->buffer;
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AddLength(sha, sha->buffLen); /* before adding pads */
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local[sha->buffLen++] = 0x80; /* add 1 */
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/* pad with zeros */
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if (sha->buffLen > SHA_PAD_SIZE) {
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XMEMSET(&local[sha->buffLen], 0, SHA_BLOCK_SIZE - sha->buffLen);
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sha->buffLen += SHA_BLOCK_SIZE - sha->buffLen;
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#if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
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ByteReverseWords(sha->buffer, sha->buffer, SHA_BLOCK_SIZE);
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#endif
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XTRANSFORM(sha, local);
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sha->buffLen = 0;
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}
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XMEMSET(&local[sha->buffLen], 0, SHA_PAD_SIZE - sha->buffLen);
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/* put lengths in bits */
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sha->hiLen = (sha->loLen >> (8*sizeof(sha->loLen) - 3)) +
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(sha->hiLen << 3);
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sha->loLen = sha->loLen << 3;
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/* store lengths */
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#if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
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ByteReverseWords(sha->buffer, sha->buffer, SHA_BLOCK_SIZE);
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#endif
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/* ! length ordering dependent on digest endian type ! */
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XMEMCPY(&local[SHA_PAD_SIZE], &sha->hiLen, sizeof(word32));
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XMEMCPY(&local[SHA_PAD_SIZE + sizeof(word32)], &sha->loLen, sizeof(word32));
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#ifdef FREESCALE_MMCAU
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/* Kinetis requires only these bytes reversed */
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ByteReverseWords(&sha->buffer[SHA_PAD_SIZE/sizeof(word32)],
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&sha->buffer[SHA_PAD_SIZE/sizeof(word32)],
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2 * sizeof(word32));
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#endif
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XTRANSFORM(sha, local);
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords(sha->digest, sha->digest, SHA_DIGEST_SIZE);
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#endif
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XMEMCPY(hash, sha->digest, SHA_DIGEST_SIZE);
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return wc_InitSha(sha); /* reset state */
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}
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#endif /* STM32F2_HASH */
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int wc_ShaHash(const byte* data, word32 len, byte* hash)
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{
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return ShaHash(data, len, hash);
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}
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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Sha* sha;
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#else
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Sha sha[1];
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#endif
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#ifdef WOLFSSL_SMALL_STACK
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sha = (Sha*)XMALLOC(sizeof(Sha), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (sha == NULL)
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return MEMORY_E;
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#endif
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if ((ret = wc_InitSha(sha)) != 0) {
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CYASSL_MSG("wc_InitSha failed");
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}
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else {
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wc_ShaUpdate(sha, data, len);
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wc_ShaFinal(sha, hash);
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}
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(sha, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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#endif /* not defined HAVE_FIPS */
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/* fips wrapper calls, user can call direct */
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#ifdef HAVE_FIPS
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