wolf SSL
wolfSSL 3.11.1 for TLS1.3 beta
Diff: wolfcrypt/src/sha.c
- Revision:
- 11:cee25a834751
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wolfcrypt/src/sha.c Tue May 30 01:44:10 2017 +0000
@@ -0,0 +1,572 @@
+/* sha.c
+ *
+ * Copyright (C) 2006-2016 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
+
+#ifdef HAVE_CONFIG_H
+ #include <config.h>
+#endif
+
+#include <wolfssl/wolfcrypt/settings.h>
+
+#if !defined(NO_SHA)
+
+#include <wolfssl/wolfcrypt/sha.h>
+#include <wolfssl/wolfcrypt/error-crypt.h>
+
+/* fips wrapper calls, user can call direct */
+#ifdef HAVE_FIPS
+ int wc_InitSha(Sha* sha)
+ {
+ return InitSha_fips(sha);
+ }
+ int wc_InitSha_ex(Sha* sha, void* heap, int devId)
+ {
+ (void)heap;
+ (void)devId;
+ return InitSha_fips(sha);
+ }
+
+ int wc_ShaUpdate(Sha* sha, const byte* data, word32 len)
+ {
+ return ShaUpdate_fips(sha, data, len);
+ }
+
+ int wc_ShaFinal(Sha* sha, byte* out)
+ {
+ return ShaFinal_fips(sha,out);
+ }
+ void wc_ShaFree(Sha* sha)
+ {
+ (void)sha;
+ /* Not supported in FIPS */
+ }
+
+#else /* else build without fips */
+
+
+#if defined(WOLFSSL_TI_HASH)
+ /* #include <wolfcrypt/src/port/ti/ti-hash.c> included by wc_port.c */
+
+#else
+
+#include <wolfssl/wolfcrypt/logging.h>
+#ifdef NO_INLINE
+ #include <wolfssl/wolfcrypt/misc.h>
+#else
+ #define WOLFSSL_MISC_INCLUDED
+ #include <wolfcrypt/src/misc.c>
+#endif
+
+
+/* Hardware Acceleration */
+#if defined(WOLFSSL_PIC32MZ_HASH)
+ #define USE_SHA_SOFTWARE_IMPL
+ #define wc_InitSha wc_InitSha_sw
+ #define wc_ShaUpdate wc_ShaUpdate_sw
+ #define wc_ShaFinal wc_ShaFinal_sw
+
+#elif defined(STM32F2_HASH) || defined(STM32F4_HASH)
+
+ /*
+ * STM32F2/F4 hardware SHA1 support through the standard peripheral
+ * library. (See note in README).
+ */
+
+ static int InitSha(Sha* sha)
+ {
+ /* STM32 struct notes:
+ * sha->buffer = first 4 bytes used to hold partial block if needed
+ * sha->buffLen = num bytes currently stored in sha->buffer
+ * sha->loLen = num bytes that have been written to STM32 FIFO
+ */
+ XMEMSET(sha->buffer, 0, SHA_REG_SIZE);
+ sha->buffLen = 0;
+ sha->loLen = 0;
+
+ /* initialize HASH peripheral */
+ HASH_DeInit();
+
+ /* configure algo used, algo mode, datatype */
+ HASH->CR &= ~ (HASH_CR_ALGO | HASH_CR_DATATYPE | HASH_CR_MODE);
+ HASH->CR |= (HASH_AlgoSelection_SHA1 | HASH_AlgoMode_HASH
+ | HASH_DataType_8b);
+
+ /* reset HASH processor */
+ HASH->CR |= HASH_CR_INIT;
+
+ return 0;
+ }
+
+ int wc_ShaUpdate(Sha* sha, const byte* data, word32 len)
+ {
+ word32 i = 0;
+ word32 fill = 0;
+ word32 diff = 0;
+
+ /* if saved partial block is available */
+ if (sha->buffLen) {
+ fill = 4 - sha->buffLen;
+
+ /* if enough data to fill, fill and push to FIFO */
+ if (fill <= len) {
+ XMEMCPY((byte*)sha->buffer + sha->buffLen, data, fill);
+ HASH_DataIn(*(uint32_t*)sha->buffer);
+
+ data += fill;
+ len -= fill;
+ sha->loLen += 4;
+ sha->buffLen = 0;
+ } else {
+ /* append partial to existing stored block */
+ XMEMCPY((byte*)sha->buffer + sha->buffLen, data, len);
+ sha->buffLen += len;
+ return 0;
+ }
+ }
+
+ /* write input block in the IN FIFO */
+ for(i = 0; i < len; i += 4)
+ {
+ diff = len - i;
+ if ( diff < 4) {
+ /* store incomplete last block, not yet in FIFO */
+ XMEMSET(sha->buffer, 0, SHA_REG_SIZE);
+ XMEMCPY((byte*)sha->buffer, data, diff);
+ sha->buffLen = diff;
+ } else {
+ HASH_DataIn(*(uint32_t*)data);
+ data+=4;
+ }
+ }
+
+ /* keep track of total data length thus far */
+ sha->loLen += (len - sha->buffLen);
+
+ return 0;
+ }
+
+ int wc_ShaFinal(Sha* sha, byte* hash)
+ {
+ __IO uint16_t nbvalidbitsdata = 0;
+
+ /* finish reading any trailing bytes into FIFO */
+ if (sha->buffLen) {
+ HASH_DataIn(*(uint32_t*)sha->buffer);
+ sha->loLen += sha->buffLen;
+ }
+
+ /* calculate number of valid bits in last word of input data */
+ nbvalidbitsdata = 8 * (sha->loLen % SHA_REG_SIZE);
+
+ /* configure number of valid bits in last word of the data */
+ HASH_SetLastWordValidBitsNbr(nbvalidbitsdata);
+
+ /* start HASH processor */
+ HASH_StartDigest();
+
+ /* wait until Busy flag == RESET */
+ while (HASH_GetFlagStatus(HASH_FLAG_BUSY) != RESET) {}
+
+ /* read message digest */
+ sha->digest[0] = HASH->HR[0];
+ sha->digest[1] = HASH->HR[1];
+ sha->digest[2] = HASH->HR[2];
+ sha->digest[3] = HASH->HR[3];
+ sha->digest[4] = HASH->HR[4];
+
+ ByteReverseWords(sha->digest, sha->digest, SHA_DIGEST_SIZE);
+
+ XMEMCPY(hash, sha->digest, SHA_DIGEST_SIZE);
+
+ return wc_InitSha(sha); /* reset state */
+ }
+
+
+#elif defined(FREESCALE_LTC_SHA)
+
+ #include "fsl_ltc.h"
+ static int InitSha(Sha* sha)
+ {
+ LTC_HASH_Init(LTC_BASE, &sha->ctx, kLTC_Sha1, NULL, 0);
+ return 0;
+ }
+
+ int wc_ShaUpdate(Sha* sha, const byte* data, word32 len)
+ {
+ LTC_HASH_Update(&sha->ctx, data, len);
+ return 0;
+ }
+
+ int wc_ShaFinal(Sha* sha, byte* hash)
+ {
+ uint32_t hashlen = SHA_DIGEST_SIZE;
+ LTC_HASH_Finish(&sha->ctx, hash, &hashlen);
+ return wc_InitSha(sha); /* reset state */
+ }
+
+
+#elif defined(FREESCALE_MMCAU_SHA)
+
+ #include "fsl_mmcau.h"
+ #define USE_SHA_SOFTWARE_IMPL /* Only for API's, actual transform is here */
+ #define XSHATRANSFORM ShaTransform
+
+ static int InitSha(Sha* sha)
+ {
+ int ret = 0;
+ ret = wolfSSL_CryptHwMutexLock();
+ if(ret != 0) {
+ return ret;
+ }
+ MMCAU_SHA1_InitializeOutput((uint32_t*)sha->digest);
+ wolfSSL_CryptHwMutexUnLock();
+
+ sha->buffLen = 0;
+ sha->loLen = 0;
+ sha->hiLen = 0;
+
+ return ret;
+ }
+
+ static int ShaTransform(Sha* sha, byte* data)
+ {
+ int ret = wolfSSL_CryptHwMutexLock();
+ if(ret == 0) {
+ MMCAU_SHA1_HashN(data, 1, (uint32_t*)sha->digest);
+ wolfSSL_CryptHwMutexUnLock();
+ }
+ return ret;
+ }
+
+#else
+
+ /* Software implementation */
+ #define USE_SHA_SOFTWARE_IMPL
+
+ static int InitSha(Sha* sha)
+ {
+ int ret = 0;
+
+ sha->digest[0] = 0x67452301L;
+ sha->digest[1] = 0xEFCDAB89L;
+ sha->digest[2] = 0x98BADCFEL;
+ sha->digest[3] = 0x10325476L;
+ sha->digest[4] = 0xC3D2E1F0L;
+
+ sha->buffLen = 0;
+ sha->loLen = 0;
+ sha->hiLen = 0;
+
+ return ret;
+ }
+
+#endif /* End Hardware Acceleration */
+
+
+/* Software implementation */
+#ifdef USE_SHA_SOFTWARE_IMPL
+
+/* Check if custom Sha transform is used */
+#ifndef XSHATRANSFORM
+ #define XSHATRANSFORM ShaTransform
+
+ #define blk0(i) (W[i] = sha->buffer[i])
+ #define blk1(i) (W[(i)&15] = \
+ rotlFixed(W[((i)+13)&15]^W[((i)+8)&15]^W[((i)+2)&15]^W[(i)&15],1))
+
+ #define f1(x,y,z) ((z)^((x) &((y)^(z))))
+ #define f2(x,y,z) ((x)^(y)^(z))
+ #define f3(x,y,z) (((x)&(y))|((z)&((x)|(y))))
+ #define f4(x,y,z) ((x)^(y)^(z))
+
+ /* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
+ #define R0(v,w,x,y,z,i) (z)+= f1((w),(x),(y)) + blk0((i)) + 0x5A827999+ \
+ rotlFixed((v),5); (w) = rotlFixed((w),30);
+ #define R1(v,w,x,y,z,i) (z)+= f1((w),(x),(y)) + blk1((i)) + 0x5A827999+ \
+ rotlFixed((v),5); (w) = rotlFixed((w),30);
+ #define R2(v,w,x,y,z,i) (z)+= f2((w),(x),(y)) + blk1((i)) + 0x6ED9EBA1+ \
+ rotlFixed((v),5); (w) = rotlFixed((w),30);
+ #define R3(v,w,x,y,z,i) (z)+= f3((w),(x),(y)) + blk1((i)) + 0x8F1BBCDC+ \
+ rotlFixed((v),5); (w) = rotlFixed((w),30);
+ #define R4(v,w,x,y,z,i) (z)+= f4((w),(x),(y)) + blk1((i)) + 0xCA62C1D6+ \
+ rotlFixed((v),5); (w) = rotlFixed((w),30);
+
+ static void ShaTransform(Sha* sha, byte* data)
+ {
+ word32 W[SHA_BLOCK_SIZE / sizeof(word32)];
+
+ /* Copy context->state[] to working vars */
+ word32 a = sha->digest[0];
+ word32 b = sha->digest[1];
+ word32 c = sha->digest[2];
+ word32 d = sha->digest[3];
+ word32 e = sha->digest[4];
+
+ #ifdef USE_SLOW_SHA
+ word32 t, i;
+
+ for (i = 0; i < 16; i++) {
+ R0(a, b, c, d, e, i);
+ t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+
+ for (; i < 20; i++) {
+ R1(a, b, c, d, e, i);
+ t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+
+ for (; i < 40; i++) {
+ R2(a, b, c, d, e, i);
+ t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+
+ for (; i < 60; i++) {
+ R3(a, b, c, d, e, i);
+ t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+
+ for (; i < 80; i++) {
+ R4(a, b, c, d, e, i);
+ t = e; e = d; d = c; c = b; b = a; a = t;
+ }
+ #else
+ /* nearly 1 K bigger in code size but 25% faster */
+ /* 4 rounds of 20 operations each. Loop unrolled. */
+ 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);
+ 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);
+ 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);
+ 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);
+
+ 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);
+
+ 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);
+ 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);
+ 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);
+ 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);
+ 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);
+
+ 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);
+ 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);
+ 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);
+ 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);
+ 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);
+
+ 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);
+ 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);
+ 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);
+ 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);
+ 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);
+ #endif
+
+ /* Add the working vars back into digest state[] */
+ sha->digest[0] += a;
+ sha->digest[1] += b;
+ sha->digest[2] += c;
+ sha->digest[3] += d;
+ sha->digest[4] += e;
+
+ (void)data; /* Not used */
+ }
+#endif /* !USE_CUSTOM_SHA_TRANSFORM */
+
+
+static INLINE void AddLength(Sha* sha, word32 len)
+{
+ word32 tmp = sha->loLen;
+ if ( (sha->loLen += len) < tmp)
+ sha->hiLen++; /* carry low to high */
+}
+
+int wc_InitSha_ex(Sha* sha, void* heap, int devId)
+{
+ int ret = 0;
+
+ if (sha == NULL)
+ return BAD_FUNC_ARG;
+
+ sha->heap = heap;
+
+ ret = InitSha(sha);
+ if (ret != 0)
+ return ret;
+
+#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_SHA)
+ ret = wolfAsync_DevCtxInit(&sha->asyncDev, WOLFSSL_ASYNC_MARKER_SHA,
+ sha->heap, devId);
+#else
+ (void)devId;
+#endif /* WOLFSSL_ASYNC_CRYPT */
+
+ return ret;
+}
+
+int wc_ShaUpdate(Sha* sha, const byte* data, word32 len)
+{
+ /* do block size increments */
+ byte* local = (byte*)sha->buffer;
+
+#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_SHA)
+ if (sha->asyncDev.marker == WOLFSSL_ASYNC_MARKER_SHA) {
+ #if defined(HAVE_INTEL_QA)
+ return IntelQaSymSha(&sha->asyncDev, NULL, data, len);
+ #endif
+ }
+#endif /* WOLFSSL_ASYNC_CRYPT */
+
+ /* check that internal buffLen is valid */
+ if (sha->buffLen >= SHA_BLOCK_SIZE)
+ return BUFFER_E;
+
+ while (len) {
+ word32 add = min(len, SHA_BLOCK_SIZE - sha->buffLen);
+ XMEMCPY(&local[sha->buffLen], data, add);
+
+ sha->buffLen += add;
+ data += add;
+ len -= add;
+
+ if (sha->buffLen == SHA_BLOCK_SIZE) {
+#if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)
+ ByteReverseWords(sha->buffer, sha->buffer, SHA_BLOCK_SIZE);
+#endif
+ XSHATRANSFORM(sha, local);
+ AddLength(sha, SHA_BLOCK_SIZE);
+ sha->buffLen = 0;
+ }
+ }
+
+ return 0;
+}
+
+int wc_ShaFinal(Sha* sha, byte* hash)
+{
+ byte* local = (byte*)sha->buffer;
+
+#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_SHA)
+ if (sha->asyncDev.marker == WOLFSSL_ASYNC_MARKER_SHA) {
+ #if defined(HAVE_INTEL_QA)
+ return IntelQaSymSha(&sha->asyncDev, hash, NULL, SHA_DIGEST_SIZE);
+ #endif
+ }
+#endif /* WOLFSSL_ASYNC_CRYPT */
+
+ AddLength(sha, sha->buffLen); /* before adding pads */
+
+ local[sha->buffLen++] = 0x80; /* add 1 */
+
+ /* pad with zeros */
+ if (sha->buffLen > SHA_PAD_SIZE) {
+ XMEMSET(&local[sha->buffLen], 0, SHA_BLOCK_SIZE - sha->buffLen);
+ sha->buffLen += SHA_BLOCK_SIZE - sha->buffLen;
+
+#if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)
+ ByteReverseWords(sha->buffer, sha->buffer, SHA_BLOCK_SIZE);
+#endif
+ XSHATRANSFORM(sha, local);
+ sha->buffLen = 0;
+ }
+ XMEMSET(&local[sha->buffLen], 0, SHA_PAD_SIZE - sha->buffLen);
+
+ /* put lengths in bits */
+ sha->hiLen = (sha->loLen >> (8*sizeof(sha->loLen) - 3)) +
+ (sha->hiLen << 3);
+ sha->loLen = sha->loLen << 3;
+
+ /* store lengths */
+#if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU_SHA)
+ ByteReverseWords(sha->buffer, sha->buffer, SHA_BLOCK_SIZE);
+#endif
+ /* ! length ordering dependent on digest endian type ! */
+ XMEMCPY(&local[SHA_PAD_SIZE], &sha->hiLen, sizeof(word32));
+ XMEMCPY(&local[SHA_PAD_SIZE + sizeof(word32)], &sha->loLen, sizeof(word32));
+
+#ifdef FREESCALE_MMCAU_SHA
+ /* Kinetis requires only these bytes reversed */
+ ByteReverseWords(&sha->buffer[SHA_PAD_SIZE/sizeof(word32)],
+ &sha->buffer[SHA_PAD_SIZE/sizeof(word32)],
+ 2 * sizeof(word32));
+#endif
+
+ XSHATRANSFORM(sha, local);
+#ifdef LITTLE_ENDIAN_ORDER
+ ByteReverseWords(sha->digest, sha->digest, SHA_DIGEST_SIZE);
+#endif
+ XMEMCPY(hash, sha->digest, SHA_DIGEST_SIZE);
+
+ return InitSha(sha); /* reset state */
+}
+
+#endif /* USE_SHA_SOFTWARE_IMPL */
+
+
+int wc_InitSha(Sha* sha)
+{
+ return wc_InitSha_ex(sha, NULL, INVALID_DEVID);
+}
+
+void wc_ShaFree(Sha* sha)
+{
+ if (sha == NULL)
+ return;
+
+#if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_SHA)
+ wolfAsync_DevCtxFree(&sha->asyncDev, WOLFSSL_ASYNC_MARKER_SHA);
+#endif /* WOLFSSL_ASYNC_CRYPT */
+}
+
+#endif /* !WOLFSSL_TI_HASH */
+#endif /* HAVE_FIPS */
+
+#ifndef WOLFSSL_TI_HASH
+int wc_ShaGetHash(Sha* sha, byte* hash)
+{
+ int ret;
+ Sha tmpSha;
+
+ if (sha == NULL || hash == NULL)
+ return BAD_FUNC_ARG;
+
+ ret = wc_ShaCopy(sha, &tmpSha);
+ if (ret == 0) {
+ ret = wc_ShaFinal(&tmpSha, hash);
+ }
+ return ret;
+}
+
+int wc_ShaCopy(Sha* src, Sha* dst)
+{
+ int ret = 0;
+
+ if (src == NULL || dst == NULL)
+ return BAD_FUNC_ARG;
+
+ XMEMCPY(dst, src, sizeof(Sha));
+
+#ifdef WOLFSSL_ASYNC_CRYPT
+ ret = wolfAsync_DevCopy(&src->asyncDev, &dst->asyncDev);
+#endif
+
+ return ret;
+}
+#endif /* !WOLFSSL_TI_HASH */
+
+#endif /* !NO_SHA */
+