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227 lines
8.0 KiB
C
227 lines
8.0 KiB
C
/* md5.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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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <cyassl/ctaocrypt/md5.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 InitMd5(Md5* md5)
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{
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md5->digest[0] = 0x67452301L;
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md5->digest[1] = 0xefcdab89L;
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md5->digest[2] = 0x98badcfeL;
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md5->digest[3] = 0x10325476L;
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md5->buffLen = 0;
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md5->loLen = 0;
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md5->hiLen = 0;
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}
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static void Transform(Md5* md5)
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{
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#define F1(x, y, z) (z ^ (x & (y ^ z)))
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#define F2(x, y, z) F1(z, x, y)
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#define F3(x, y, z) (x ^ y ^ z)
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#define F4(x, y, z) (y ^ (x | ~z))
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#define MD5STEP(f, w, x, y, z, data, s) \
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w = rotlFixed(w + f(x, y, z) + data, s) + x
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/* Copy context->state[] to working vars */
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word32 a = md5->digest[0];
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word32 b = md5->digest[1];
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word32 c = md5->digest[2];
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word32 d = md5->digest[3];
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MD5STEP(F1, a, b, c, d, md5->buffer[0] + 0xd76aa478, 7);
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MD5STEP(F1, d, a, b, c, md5->buffer[1] + 0xe8c7b756, 12);
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MD5STEP(F1, c, d, a, b, md5->buffer[2] + 0x242070db, 17);
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MD5STEP(F1, b, c, d, a, md5->buffer[3] + 0xc1bdceee, 22);
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MD5STEP(F1, a, b, c, d, md5->buffer[4] + 0xf57c0faf, 7);
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MD5STEP(F1, d, a, b, c, md5->buffer[5] + 0x4787c62a, 12);
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MD5STEP(F1, c, d, a, b, md5->buffer[6] + 0xa8304613, 17);
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MD5STEP(F1, b, c, d, a, md5->buffer[7] + 0xfd469501, 22);
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MD5STEP(F1, a, b, c, d, md5->buffer[8] + 0x698098d8, 7);
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MD5STEP(F1, d, a, b, c, md5->buffer[9] + 0x8b44f7af, 12);
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MD5STEP(F1, c, d, a, b, md5->buffer[10] + 0xffff5bb1, 17);
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MD5STEP(F1, b, c, d, a, md5->buffer[11] + 0x895cd7be, 22);
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MD5STEP(F1, a, b, c, d, md5->buffer[12] + 0x6b901122, 7);
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MD5STEP(F1, d, a, b, c, md5->buffer[13] + 0xfd987193, 12);
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MD5STEP(F1, c, d, a, b, md5->buffer[14] + 0xa679438e, 17);
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MD5STEP(F1, b, c, d, a, md5->buffer[15] + 0x49b40821, 22);
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MD5STEP(F2, a, b, c, d, md5->buffer[1] + 0xf61e2562, 5);
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MD5STEP(F2, d, a, b, c, md5->buffer[6] + 0xc040b340, 9);
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MD5STEP(F2, c, d, a, b, md5->buffer[11] + 0x265e5a51, 14);
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MD5STEP(F2, b, c, d, a, md5->buffer[0] + 0xe9b6c7aa, 20);
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MD5STEP(F2, a, b, c, d, md5->buffer[5] + 0xd62f105d, 5);
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MD5STEP(F2, d, a, b, c, md5->buffer[10] + 0x02441453, 9);
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MD5STEP(F2, c, d, a, b, md5->buffer[15] + 0xd8a1e681, 14);
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MD5STEP(F2, b, c, d, a, md5->buffer[4] + 0xe7d3fbc8, 20);
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MD5STEP(F2, a, b, c, d, md5->buffer[9] + 0x21e1cde6, 5);
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MD5STEP(F2, d, a, b, c, md5->buffer[14] + 0xc33707d6, 9);
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MD5STEP(F2, c, d, a, b, md5->buffer[3] + 0xf4d50d87, 14);
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MD5STEP(F2, b, c, d, a, md5->buffer[8] + 0x455a14ed, 20);
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MD5STEP(F2, a, b, c, d, md5->buffer[13] + 0xa9e3e905, 5);
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MD5STEP(F2, d, a, b, c, md5->buffer[2] + 0xfcefa3f8, 9);
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MD5STEP(F2, c, d, a, b, md5->buffer[7] + 0x676f02d9, 14);
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MD5STEP(F2, b, c, d, a, md5->buffer[12] + 0x8d2a4c8a, 20);
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MD5STEP(F3, a, b, c, d, md5->buffer[5] + 0xfffa3942, 4);
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MD5STEP(F3, d, a, b, c, md5->buffer[8] + 0x8771f681, 11);
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MD5STEP(F3, c, d, a, b, md5->buffer[11] + 0x6d9d6122, 16);
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MD5STEP(F3, b, c, d, a, md5->buffer[14] + 0xfde5380c, 23);
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MD5STEP(F3, a, b, c, d, md5->buffer[1] + 0xa4beea44, 4);
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MD5STEP(F3, d, a, b, c, md5->buffer[4] + 0x4bdecfa9, 11);
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MD5STEP(F3, c, d, a, b, md5->buffer[7] + 0xf6bb4b60, 16);
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MD5STEP(F3, b, c, d, a, md5->buffer[10] + 0xbebfbc70, 23);
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MD5STEP(F3, a, b, c, d, md5->buffer[13] + 0x289b7ec6, 4);
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MD5STEP(F3, d, a, b, c, md5->buffer[0] + 0xeaa127fa, 11);
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MD5STEP(F3, c, d, a, b, md5->buffer[3] + 0xd4ef3085, 16);
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MD5STEP(F3, b, c, d, a, md5->buffer[6] + 0x04881d05, 23);
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MD5STEP(F3, a, b, c, d, md5->buffer[9] + 0xd9d4d039, 4);
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MD5STEP(F3, d, a, b, c, md5->buffer[12] + 0xe6db99e5, 11);
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MD5STEP(F3, c, d, a, b, md5->buffer[15] + 0x1fa27cf8, 16);
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MD5STEP(F3, b, c, d, a, md5->buffer[2] + 0xc4ac5665, 23);
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MD5STEP(F4, a, b, c, d, md5->buffer[0] + 0xf4292244, 6);
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MD5STEP(F4, d, a, b, c, md5->buffer[7] + 0x432aff97, 10);
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MD5STEP(F4, c, d, a, b, md5->buffer[14] + 0xab9423a7, 15);
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MD5STEP(F4, b, c, d, a, md5->buffer[5] + 0xfc93a039, 21);
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MD5STEP(F4, a, b, c, d, md5->buffer[12] + 0x655b59c3, 6);
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MD5STEP(F4, d, a, b, c, md5->buffer[3] + 0x8f0ccc92, 10);
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MD5STEP(F4, c, d, a, b, md5->buffer[10] + 0xffeff47d, 15);
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MD5STEP(F4, b, c, d, a, md5->buffer[1] + 0x85845dd1, 21);
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MD5STEP(F4, a, b, c, d, md5->buffer[8] + 0x6fa87e4f, 6);
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MD5STEP(F4, d, a, b, c, md5->buffer[15] + 0xfe2ce6e0, 10);
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MD5STEP(F4, c, d, a, b, md5->buffer[6] + 0xa3014314, 15);
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MD5STEP(F4, b, c, d, a, md5->buffer[13] + 0x4e0811a1, 21);
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MD5STEP(F4, a, b, c, d, md5->buffer[4] + 0xf7537e82, 6);
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MD5STEP(F4, d, a, b, c, md5->buffer[11] + 0xbd3af235, 10);
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MD5STEP(F4, c, d, a, b, md5->buffer[2] + 0x2ad7d2bb, 15);
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MD5STEP(F4, b, c, d, a, md5->buffer[9] + 0xeb86d391, 21);
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/* Add the working vars back into digest state[] */
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md5->digest[0] += a;
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md5->digest[1] += b;
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md5->digest[2] += c;
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md5->digest[3] += d;
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}
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static INLINE void AddLength(Md5* md5, word32 len)
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{
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word32 tmp = md5->loLen;
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if ( (md5->loLen += len) < tmp)
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md5->hiLen++; /* carry low to high */
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}
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void Md5Update(Md5* md5, const byte* data, word32 len)
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{
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/* do block size increments */
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byte* local = (byte*)md5->buffer;
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while (len) {
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word32 add = min(len, MD5_BLOCK_SIZE - md5->buffLen);
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XMEMCPY(&local[md5->buffLen], data, add);
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md5->buffLen += add;
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data += add;
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len -= add;
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if (md5->buffLen == MD5_BLOCK_SIZE) {
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#ifdef BIG_ENDIAN_ORDER
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ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
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#endif
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Transform(md5);
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AddLength(md5, MD5_BLOCK_SIZE);
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md5->buffLen = 0;
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}
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}
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}
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void Md5Final(Md5* md5, byte* hash)
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{
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byte* local = (byte*)md5->buffer;
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AddLength(md5, md5->buffLen); /* before adding pads */
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local[md5->buffLen++] = 0x80; /* add 1 */
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/* pad with zeros */
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if (md5->buffLen > MD5_PAD_SIZE) {
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XMEMSET(&local[md5->buffLen], 0, MD5_BLOCK_SIZE - md5->buffLen);
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md5->buffLen += MD5_BLOCK_SIZE - md5->buffLen;
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#ifdef BIG_ENDIAN_ORDER
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ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
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#endif
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Transform(md5);
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md5->buffLen = 0;
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}
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XMEMSET(&local[md5->buffLen], 0, MD5_PAD_SIZE - md5->buffLen);
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/* put lengths in bits */
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md5->hiLen = (md5->loLen >> (8*sizeof(md5->loLen) - 3)) +
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(md5->hiLen << 3);
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md5->loLen = md5->loLen << 3;
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/* store lengths */
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#ifdef BIG_ENDIAN_ORDER
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ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
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#endif
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/* ! length ordering dependent on digest endian type ! */
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XMEMCPY(&local[MD5_PAD_SIZE], &md5->loLen, sizeof(word32));
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XMEMCPY(&local[MD5_PAD_SIZE + sizeof(word32)], &md5->hiLen, sizeof(word32));
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Transform(md5);
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#ifdef BIG_ENDIAN_ORDER
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ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
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#endif
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XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
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InitMd5(md5); /* reset state */
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}
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