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Add FreeRTOS-Plus directory with new directory structure so it matches the FreeRTOS directory.
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Richard Barry
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528 changed files with 228252 additions and 0 deletions
209
FreeRTOS-Plus/Source/CyaSSL/ctaocrypt/src/sha256.c
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209
FreeRTOS-Plus/Source/CyaSSL/ctaocrypt/src/sha256.c
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/* sha256.c
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*
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* Copyright (C) 2006-2012 Sawtooth Consulting Ltd.
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*
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* This file is part of CyaSSL.
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*
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* CyaSSL 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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* 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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/* code submitted by raphael.huck@efixo.com */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifndef NO_SHA256
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#include <cyassl/ctaocrypt/sha256.h>
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#ifdef NO_INLINE
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#include <cyassl/ctaocrypt/misc.h>
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#else
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#include <ctaocrypt/src/misc.c>
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#endif
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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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void InitSha256(Sha256* sha256)
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{
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sha256->digest[0] = 0x6A09E667L;
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sha256->digest[1] = 0xBB67AE85L;
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sha256->digest[2] = 0x3C6EF372L;
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sha256->digest[3] = 0xA54FF53AL;
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sha256->digest[4] = 0x510E527FL;
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sha256->digest[5] = 0x9B05688CL;
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sha256->digest[6] = 0x1F83D9ABL;
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sha256->digest[7] = 0x5BE0CD19L;
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sha256->buffLen = 0;
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sha256->loLen = 0;
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sha256->hiLen = 0;
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}
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static const word32 K[64] = {
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0x428A2F98L, 0x71374491L, 0xB5C0FBCFL, 0xE9B5DBA5L, 0x3956C25BL,
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0x59F111F1L, 0x923F82A4L, 0xAB1C5ED5L, 0xD807AA98L, 0x12835B01L,
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0x243185BEL, 0x550C7DC3L, 0x72BE5D74L, 0x80DEB1FEL, 0x9BDC06A7L,
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0xC19BF174L, 0xE49B69C1L, 0xEFBE4786L, 0x0FC19DC6L, 0x240CA1CCL,
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0x2DE92C6FL, 0x4A7484AAL, 0x5CB0A9DCL, 0x76F988DAL, 0x983E5152L,
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0xA831C66DL, 0xB00327C8L, 0xBF597FC7L, 0xC6E00BF3L, 0xD5A79147L,
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0x06CA6351L, 0x14292967L, 0x27B70A85L, 0x2E1B2138L, 0x4D2C6DFCL,
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0x53380D13L, 0x650A7354L, 0x766A0ABBL, 0x81C2C92EL, 0x92722C85L,
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0xA2BFE8A1L, 0xA81A664BL, 0xC24B8B70L, 0xC76C51A3L, 0xD192E819L,
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0xD6990624L, 0xF40E3585L, 0x106AA070L, 0x19A4C116L, 0x1E376C08L,
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0x2748774CL, 0x34B0BCB5L, 0x391C0CB3L, 0x4ED8AA4AL, 0x5B9CCA4FL,
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0x682E6FF3L, 0x748F82EEL, 0x78A5636FL, 0x84C87814L, 0x8CC70208L,
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0x90BEFFFAL, 0xA4506CEBL, 0xBEF9A3F7L, 0xC67178F2L
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};
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#define Ch(x,y,z) (z ^ (x & (y ^ z)))
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#define Maj(x,y,z) (((x | y) & z) | (x & y))
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#define S(x, n) rotrFixed(x, n)
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#define R(x, n) (((x)&0xFFFFFFFFL)>>(n))
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#define Sigma0(x) (S(x, 2) ^ S(x, 13) ^ S(x, 22))
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#define Sigma1(x) (S(x, 6) ^ S(x, 11) ^ S(x, 25))
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#define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3))
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#define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10))
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#define RND(a,b,c,d,e,f,g,h,i) \
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t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \
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t1 = Sigma0(a) + Maj(a, b, c); \
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d += t0; \
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h = t0 + t1;
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static void Transform(Sha256* sha256)
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{
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word32 S[8], W[64], t0, t1;
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int i;
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/* Copy context->state[] to working vars */
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for (i = 0; i < 8; i++)
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S[i] = sha256->digest[i];
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for (i = 0; i < 16; i++)
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W[i] = sha256->buffer[i];
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for (i = 16; i < 64; i++)
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W[i] = Gamma1(W[i-2]) + W[i-7] + Gamma0(W[i-15]) + W[i-16];
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for (i = 0; i < 64; i += 8) {
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RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i+0);
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RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],i+1);
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RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],i+2);
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RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],i+3);
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RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],i+4);
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RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],i+5);
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RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],i+6);
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RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],i+7);
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}
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/* Add the working vars back into digest state[] */
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for (i = 0; i < 8; i++) {
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sha256->digest[i] += S[i];
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}
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}
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static INLINE void AddLength(Sha256* sha256, word32 len)
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{
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word32 tmp = sha256->loLen;
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if ( (sha256->loLen += len) < tmp)
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sha256->hiLen++; /* carry low to high */
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}
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void Sha256Update(Sha256* sha256, const byte* data, word32 len)
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{
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/* do block size increments */
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byte* local = (byte*)sha256->buffer;
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while (len) {
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word32 add = min(len, SHA256_BLOCK_SIZE - sha256->buffLen);
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XMEMCPY(&local[sha256->buffLen], data, add);
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sha256->buffLen += add;
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data += add;
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len -= add;
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if (sha256->buffLen == SHA256_BLOCK_SIZE) {
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseBytes(local, local, SHA256_BLOCK_SIZE);
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#endif
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Transform(sha256);
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AddLength(sha256, SHA256_BLOCK_SIZE);
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sha256->buffLen = 0;
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}
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}
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}
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void Sha256Final(Sha256* sha256, byte* hash)
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{
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byte* local = (byte*)sha256->buffer;
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AddLength(sha256, sha256->buffLen); /* before adding pads */
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local[sha256->buffLen++] = 0x80; /* add 1 */
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/* pad with zeros */
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if (sha256->buffLen > SHA256_PAD_SIZE) {
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XMEMSET(&local[sha256->buffLen], 0, SHA256_BLOCK_SIZE - sha256->buffLen);
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sha256->buffLen += SHA256_BLOCK_SIZE - sha256->buffLen;
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseBytes(local, local, SHA256_BLOCK_SIZE);
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#endif
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Transform(sha256);
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sha256->buffLen = 0;
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}
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XMEMSET(&local[sha256->buffLen], 0, SHA256_PAD_SIZE - sha256->buffLen);
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/* put lengths in bits */
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sha256->hiLen = (sha256->loLen >> (8*sizeof(sha256->loLen) - 3)) +
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(sha256->hiLen << 3);
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sha256->loLen = sha256->loLen << 3;
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/* store lengths */
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseBytes(local, local, SHA256_BLOCK_SIZE);
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#endif
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/* ! length ordering dependent on digest endian type ! */
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XMEMCPY(&local[SHA256_PAD_SIZE], &sha256->hiLen, sizeof(word32));
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XMEMCPY(&local[SHA256_PAD_SIZE + sizeof(word32)], &sha256->loLen,
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sizeof(word32));
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Transform(sha256);
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#ifdef LITTLE_ENDIAN_ORDER
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ByteReverseWords(sha256->digest, sha256->digest, SHA256_DIGEST_SIZE);
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#endif
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XMEMCPY(hash, sha256->digest, SHA256_DIGEST_SIZE);
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InitSha256(sha256); /* reset state */
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}
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#endif /* NO_SHA256 */
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