d 0773d
Fork of CyaSSL for my specific settings
Diff: ctaocrypt/src/sha256.c
- Revision:
- 0:1239e9b70ca2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ctaocrypt/src/sha256.c Sat Jul 12 07:18:23 2014 +0000
@@ -0,0 +1,288 @@
+/* sha256.c
+ *
+ * Copyright (C) 2006-2014 wolfSSL Inc.
+ *
+ * This file is part of CyaSSL.
+ *
+ * CyaSSL 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.
+ *
+ * CyaSSL 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 02110-1301, USA
+ */
+
+
+/* code submitted by raphael.huck@efixo.com */
+
+#ifdef HAVE_CONFIG_H
+ #include <config.h>
+#endif
+
+#include <cyassl/ctaocrypt/settings.h>
+
+#if !defined(NO_SHA256)
+
+#ifdef CYASSL_PIC32MZ_HASH
+#define InitSha256 InitSha256_sw
+#define Sha256Update Sha256Update_sw
+#define Sha256Final Sha256Final_sw
+#endif
+
+#ifdef HAVE_FIPS
+ /* set NO_WRAPPERS before headers, use direct internal f()s not wrappers */
+ #define FIPS_NO_WRAPPERS
+#endif
+
+#include <cyassl/ctaocrypt/sha256.h>
+#include <cyassl/ctaocrypt/error-crypt.h>
+#ifdef NO_INLINE
+ #include <cyassl/ctaocrypt/misc.h>
+#else
+ #include <ctaocrypt/src/misc.c>
+#endif
+
+#ifdef FREESCALE_MMCAU
+ #include "cau_api.h"
+#endif
+
+#ifndef min
+
+ static INLINE word32 min(word32 a, word32 b)
+ {
+ return a > b ? b : a;
+ }
+
+#endif /* min */
+
+
+int InitSha256(Sha256* sha256)
+{
+ #ifdef FREESCALE_MMCAU
+ cau_sha256_initialize_output(sha256->digest);
+ #else
+ sha256->digest[0] = 0x6A09E667L;
+ sha256->digest[1] = 0xBB67AE85L;
+ sha256->digest[2] = 0x3C6EF372L;
+ sha256->digest[3] = 0xA54FF53AL;
+ sha256->digest[4] = 0x510E527FL;
+ sha256->digest[5] = 0x9B05688CL;
+ sha256->digest[6] = 0x1F83D9ABL;
+ sha256->digest[7] = 0x5BE0CD19L;
+ #endif
+
+ sha256->buffLen = 0;
+ sha256->loLen = 0;
+ sha256->hiLen = 0;
+
+ return 0;
+}
+
+#ifdef FREESCALE_MMCAU
+ #define XTRANSFORM(S,B) Transform((S), (B))
+
+static int Transform(Sha256* sha256, byte* buf)
+{
+ cau_sha256_hash_n(buf, 1, sha256->digest);
+
+ return 0;
+}
+
+#else
+ #define XTRANSFORM(S,B) Transform((S))
+
+static const word32 K[64] = {
+ 0x428A2F98L, 0x71374491L, 0xB5C0FBCFL, 0xE9B5DBA5L, 0x3956C25BL,
+ 0x59F111F1L, 0x923F82A4L, 0xAB1C5ED5L, 0xD807AA98L, 0x12835B01L,
+ 0x243185BEL, 0x550C7DC3L, 0x72BE5D74L, 0x80DEB1FEL, 0x9BDC06A7L,
+ 0xC19BF174L, 0xE49B69C1L, 0xEFBE4786L, 0x0FC19DC6L, 0x240CA1CCL,
+ 0x2DE92C6FL, 0x4A7484AAL, 0x5CB0A9DCL, 0x76F988DAL, 0x983E5152L,
+ 0xA831C66DL, 0xB00327C8L, 0xBF597FC7L, 0xC6E00BF3L, 0xD5A79147L,
+ 0x06CA6351L, 0x14292967L, 0x27B70A85L, 0x2E1B2138L, 0x4D2C6DFCL,
+ 0x53380D13L, 0x650A7354L, 0x766A0ABBL, 0x81C2C92EL, 0x92722C85L,
+ 0xA2BFE8A1L, 0xA81A664BL, 0xC24B8B70L, 0xC76C51A3L, 0xD192E819L,
+ 0xD6990624L, 0xF40E3585L, 0x106AA070L, 0x19A4C116L, 0x1E376C08L,
+ 0x2748774CL, 0x34B0BCB5L, 0x391C0CB3L, 0x4ED8AA4AL, 0x5B9CCA4FL,
+ 0x682E6FF3L, 0x748F82EEL, 0x78A5636FL, 0x84C87814L, 0x8CC70208L,
+ 0x90BEFFFAL, 0xA4506CEBL, 0xBEF9A3F7L, 0xC67178F2L
+};
+
+#define Ch(x,y,z) (z ^ (x & (y ^ z)))
+#define Maj(x,y,z) (((x | y) & z) | (x & y))
+#define S(x, n) rotrFixed(x, n)
+#define R(x, n) (((x)&0xFFFFFFFFU)>>(n))
+#define Sigma0(x) (S(x, 2) ^ S(x, 13) ^ S(x, 22))
+#define Sigma1(x) (S(x, 6) ^ S(x, 11) ^ S(x, 25))
+#define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3))
+#define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10))
+
+#define RND(a,b,c,d,e,f,g,h,i) \
+ t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \
+ t1 = Sigma0(a) + Maj(a, b, c); \
+ d += t0; \
+ h = t0 + t1;
+
+
+static int Transform(Sha256* sha256)
+{
+ word32 S[8], t0, t1;
+ int i;
+
+#ifdef CYASSL_SMALL_STACK
+ word32* W;
+
+ W = (word32*) XMALLOC(sizeof(word32) * 64, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+ if (W == NULL)
+ return MEMORY_E;
+#else
+ word32 W[64];
+#endif
+
+ /* Copy context->state[] to working vars */
+ for (i = 0; i < 8; i++)
+ S[i] = sha256->digest[i];
+
+ for (i = 0; i < 16; i++)
+ W[i] = sha256->buffer[i];
+
+ for (i = 16; i < 64; i++)
+ W[i] = Gamma1(W[i-2]) + W[i-7] + Gamma0(W[i-15]) + W[i-16];
+
+ for (i = 0; i < 64; i += 8) {
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i+0);
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],i+1);
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],i+2);
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],i+3);
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],i+4);
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],i+5);
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],i+6);
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],i+7);
+ }
+
+ /* Add the working vars back into digest state[] */
+ for (i = 0; i < 8; i++) {
+ sha256->digest[i] += S[i];
+ }
+
+#ifdef CYASSL_SMALL_STACK
+ XFREE(W, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+#endif
+
+ return 0;
+}
+
+#endif /* FREESCALE_MMCAU */
+
+
+static INLINE void AddLength(Sha256* sha256, word32 len)
+{
+ word32 tmp = sha256->loLen;
+ if ( (sha256->loLen += len) < tmp)
+ sha256->hiLen++; /* carry low to high */
+}
+
+
+int Sha256Update(Sha256* sha256, const byte* data, word32 len)
+{
+ /* do block size increments */
+ byte* local = (byte*)sha256->buffer;
+
+ while (len) {
+ word32 add = min(len, SHA256_BLOCK_SIZE - sha256->buffLen);
+ XMEMCPY(&local[sha256->buffLen], data, add);
+
+ sha256->buffLen += add;
+ data += add;
+ len -= add;
+
+ if (sha256->buffLen == SHA256_BLOCK_SIZE) {
+ int ret;
+
+ #if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
+ ByteReverseWords(sha256->buffer, sha256->buffer,
+ SHA256_BLOCK_SIZE);
+ #endif
+
+ ret = XTRANSFORM(sha256, local);
+ if (ret != 0)
+ return ret;
+
+ AddLength(sha256, SHA256_BLOCK_SIZE);
+ sha256->buffLen = 0;
+ }
+ }
+
+ return 0;
+}
+
+
+int Sha256Final(Sha256* sha256, byte* hash)
+{
+ byte* local = (byte*)sha256->buffer;
+ int ret;
+
+ AddLength(sha256, sha256->buffLen); /* before adding pads */
+
+ local[sha256->buffLen++] = 0x80; /* add 1 */
+
+ /* pad with zeros */
+ if (sha256->buffLen > SHA256_PAD_SIZE) {
+ XMEMSET(&local[sha256->buffLen], 0, SHA256_BLOCK_SIZE - sha256->buffLen);
+ sha256->buffLen += SHA256_BLOCK_SIZE - sha256->buffLen;
+
+ #if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
+ ByteReverseWords(sha256->buffer, sha256->buffer, SHA256_BLOCK_SIZE);
+ #endif
+
+ ret = XTRANSFORM(sha256, local);
+ if (ret != 0)
+ return ret;
+
+ sha256->buffLen = 0;
+ }
+ XMEMSET(&local[sha256->buffLen], 0, SHA256_PAD_SIZE - sha256->buffLen);
+
+ /* put lengths in bits */
+ sha256->hiLen = (sha256->loLen >> (8*sizeof(sha256->loLen) - 3)) +
+ (sha256->hiLen << 3);
+ sha256->loLen = sha256->loLen << 3;
+
+ /* store lengths */
+ #if defined(LITTLE_ENDIAN_ORDER) && !defined(FREESCALE_MMCAU)
+ ByteReverseWords(sha256->buffer, sha256->buffer, SHA256_BLOCK_SIZE);
+ #endif
+ /* ! length ordering dependent on digest endian type ! */
+ XMEMCPY(&local[SHA256_PAD_SIZE], &sha256->hiLen, sizeof(word32));
+ XMEMCPY(&local[SHA256_PAD_SIZE + sizeof(word32)], &sha256->loLen,
+ sizeof(word32));
+
+ #ifdef FREESCALE_MMCAU
+ /* Kinetis requires only these bytes reversed */
+ ByteReverseWords(&sha256->buffer[SHA256_PAD_SIZE/sizeof(word32)],
+ &sha256->buffer[SHA256_PAD_SIZE/sizeof(word32)],
+ 2 * sizeof(word32));
+ #endif
+
+ ret = XTRANSFORM(sha256, local);
+ if (ret != 0)
+ return ret;
+
+ #ifdef LITTLE_ENDIAN_ORDER
+ ByteReverseWords(sha256->digest, sha256->digest, SHA256_DIGEST_SIZE);
+ #endif
+ XMEMCPY(hash, sha256->digest, SHA256_DIGEST_SIZE);
+
+ return InitSha256(sha256); /* reset state */
+}
+
+
+#endif /* NO_SHA256 */
+
+