/*************************************************************************** * Copyright (C) 2007 by Alexander S. Salieff * * salieff@mail.ru * * * * This program 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. * * * * This program 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., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ #include #include "md5.h" /* typedef a 32 bit type */ typedef unsigned long int UINT4; /* Data structure for MD5 (Message Digest) computation */ typedef struct { UINT4 i[2]; /* number of _bits_ handled mod 2^64 */ UINT4 buf[4]; /* scratch buffer */ unsigned char in[64]; /* input buffer */ unsigned char digest[16]; /* actual digest after MD5Final call */ } MD5_CTX; static unsigned char PADDING[64] = { 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; /* F, G and H are basic MD5 functions: selection, majority, parity */ #define F(x, y, z) (((x) & (y)) | ((~x) & (z))) #define G(x, y, z) (((x) & (z)) | ((y) & (~z))) #define H(x, y, z) ((x) ^ (y) ^ (z)) #define I(x, y, z) ((y) ^ ((x) | (~z))) /* ROTATE_LEFT rotates x left n bits */ #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */ /* Rotation is separate from addition to prevent recomputation */ #define FF(a, b, c, d, x, s, ac) {(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); } #define GG(a, b, c, d, x, s, ac) {(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); } #define HH(a, b, c, d, x, s, ac) {(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); } #define II(a, b, c, d, x, s, ac) {(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); } /* Basic MD5 step. Transform buf based on in. */ static void Transform (UINT4 *buf, UINT4 *in) { UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3]; /* Round 1 */ #define S11 7 #define S12 12 #define S13 17 #define S14 22 FF ( a, b, c, d, in[ 0], S11, (UINT4) 3614090360u); /* 1 */ FF ( d, a, b, c, in[ 1], S12, (UINT4) 3905402710u); /* 2 */ FF ( c, d, a, b, in[ 2], S13, (UINT4) 606105819u); /* 3 */ FF ( b, c, d, a, in[ 3], S14, (UINT4) 3250441966u); /* 4 */ FF ( a, b, c, d, in[ 4], S11, (UINT4) 4118548399u); /* 5 */ FF ( d, a, b, c, in[ 5], S12, (UINT4) 1200080426u); /* 6 */ FF ( c, d, a, b, in[ 6], S13, (UINT4) 2821735955u); /* 7 */ FF ( b, c, d, a, in[ 7], S14, (UINT4) 4249261313u); /* 8 */ FF ( a, b, c, d, in[ 8], S11, (UINT4) 1770035416u); /* 9 */ FF ( d, a, b, c, in[ 9], S12, (UINT4) 2336552879u); /* 10 */ FF ( c, d, a, b, in[10], S13, (UINT4) 4294925233u); /* 11 */ FF ( b, c, d, a, in[11], S14, (UINT4) 2304563134u); /* 12 */ FF ( a, b, c, d, in[12], S11, (UINT4) 1804603682u); /* 13 */ FF ( d, a, b, c, in[13], S12, (UINT4) 4254626195u); /* 14 */ FF ( c, d, a, b, in[14], S13, (UINT4) 2792965006u); /* 15 */ FF ( b, c, d, a, in[15], S14, (UINT4) 1236535329u); /* 16 */ /* Round 2 */ #define S21 5 #define S22 9 #define S23 14 #define S24 20 GG ( a, b, c, d, in[ 1], S21, (UINT4) 4129170786u); /* 17 */ GG ( d, a, b, c, in[ 6], S22, (UINT4) 3225465664u); /* 18 */ GG ( c, d, a, b, in[11], S23, (UINT4) 643717713u); /* 19 */ GG ( b, c, d, a, in[ 0], S24, (UINT4) 3921069994u); /* 20 */ GG ( a, b, c, d, in[ 5], S21, (UINT4) 3593408605u); /* 21 */ GG ( d, a, b, c, in[10], S22, (UINT4) 38016083u); /* 22 */ GG ( c, d, a, b, in[15], S23, (UINT4) 3634488961u); /* 23 */ GG ( b, c, d, a, in[ 4], S24, (UINT4) 3889429448u); /* 24 */ GG ( a, b, c, d, in[ 9], S21, (UINT4) 568446438u); /* 25 */ GG ( d, a, b, c, in[14], S22, (UINT4) 3275163606u); /* 26 */ GG ( c, d, a, b, in[ 3], S23, (UINT4) 4107603335u); /* 27 */ GG ( b, c, d, a, in[ 8], S24, (UINT4) 1163531501u); /* 28 */ GG ( a, b, c, d, in[13], S21, (UINT4) 2850285829u); /* 29 */ GG ( d, a, b, c, in[ 2], S22, (UINT4) 4243563512u); /* 30 */ GG ( c, d, a, b, in[ 7], S23, (UINT4) 1735328473u); /* 31 */ GG ( b, c, d, a, in[12], S24, (UINT4) 2368359562u); /* 32 */ /* Round 3 */ #define S31 4 #define S32 11 #define S33 16 #define S34 23 HH ( a, b, c, d, in[ 5], S31, (UINT4) 4294588738u); /* 33 */ HH ( d, a, b, c, in[ 8], S32, (UINT4) 2272392833u); /* 34 */ HH ( c, d, a, b, in[11], S33, (UINT4) 1839030562u); /* 35 */ HH ( b, c, d, a, in[14], S34, (UINT4) 4259657740u); /* 36 */ HH ( a, b, c, d, in[ 1], S31, (UINT4) 2763975236u); /* 37 */ HH ( d, a, b, c, in[ 4], S32, (UINT4) 1272893353u); /* 38 */ HH ( c, d, a, b, in[ 7], S33, (UINT4) 4139469664u); /* 39 */ HH ( b, c, d, a, in[10], S34, (UINT4) 3200236656u); /* 40 */ HH ( a, b, c, d, in[13], S31, (UINT4) 681279174u); /* 41 */ HH ( d, a, b, c, in[ 0], S32, (UINT4) 3936430074u); /* 42 */ HH ( c, d, a, b, in[ 3], S33, (UINT4) 3572445317u); /* 43 */ HH ( b, c, d, a, in[ 6], S34, (UINT4) 76029189u); /* 44 */ HH ( a, b, c, d, in[ 9], S31, (UINT4) 3654602809u); /* 45 */ HH ( d, a, b, c, in[12], S32, (UINT4) 3873151461u); /* 46 */ HH ( c, d, a, b, in[15], S33, (UINT4) 530742520u); /* 47 */ HH ( b, c, d, a, in[ 2], S34, (UINT4) 3299628645u); /* 48 */ /* Round 4 */ #define S41 6 #define S42 10 #define S43 15 #define S44 21 II ( a, b, c, d, in[ 0], S41, (UINT4) 4096336452u); /* 49 */ II ( d, a, b, c, in[ 7], S42, (UINT4) 1126891415u); /* 50 */ II ( c, d, a, b, in[14], S43, (UINT4) 2878612391u); /* 51 */ II ( b, c, d, a, in[ 5], S44, (UINT4) 4237533241u); /* 52 */ II ( a, b, c, d, in[12], S41, (UINT4) 1700485571u); /* 53 */ II ( d, a, b, c, in[ 3], S42, (UINT4) 2399980690u); /* 54 */ II ( c, d, a, b, in[10], S43, (UINT4) 4293915773u); /* 55 */ II ( b, c, d, a, in[ 1], S44, (UINT4) 2240044497u); /* 56 */ II ( a, b, c, d, in[ 8], S41, (UINT4) 1873313359u); /* 57 */ II ( d, a, b, c, in[15], S42, (UINT4) 4264355552u); /* 58 */ II ( c, d, a, b, in[ 6], S43, (UINT4) 2734768916u); /* 59 */ II ( b, c, d, a, in[13], S44, (UINT4) 1309151649u); /* 60 */ II ( a, b, c, d, in[ 4], S41, (UINT4) 4149444226u); /* 61 */ II ( d, a, b, c, in[11], S42, (UINT4) 3174756917u); /* 62 */ II ( c, d, a, b, in[ 2], S43, (UINT4) 718787259u); /* 63 */ II ( b, c, d, a, in[ 9], S44, (UINT4) 3951481745u); /* 64 */ buf[0] += a; buf[1] += b; buf[2] += c; buf[3] += d; } static void MD5Init (MD5_CTX *mdContext) { mdContext->i[0] = mdContext->i[1] = (UINT4)0; /* Load magic initialization constants. */ mdContext->buf[0] = (UINT4)0x67452301; mdContext->buf[1] = (UINT4)0xefcdab89; mdContext->buf[2] = (UINT4)0x98badcfe; mdContext->buf[3] = (UINT4)0x10325476; } static void MD5Update (MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen) { UINT4 in[16]; int mdi; unsigned int i, ii; /* compute number of bytes mod 64 */ mdi = (int)((mdContext->i[0] >> 3) & 0x3F); /* update number of bits */ if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0]) mdContext->i[1]++; mdContext->i[0] += ((UINT4)inLen << 3); mdContext->i[1] += ((UINT4)inLen >> 29); while (inLen--) { /* add new character to buffer, increment mdi */ mdContext->in[mdi++] = *inBuf++; /* transform if necessary */ if (mdi == 0x40) { for (i = 0, ii = 0; i < 16; i++, ii += 4) in[i] = (((UINT4)mdContext->in[ii+3]) << 24) | (((UINT4)mdContext->in[ii+2]) << 16) | (((UINT4)mdContext->in[ii+1]) << 8) | ((UINT4)mdContext->in[ii]); Transform (mdContext->buf, in); mdi = 0; } } } static void MD5Final (MD5_CTX *mdContext) { UINT4 in[16]; int mdi; unsigned int i, ii; unsigned int padLen; /* save number of bits */ in[14] = mdContext->i[0]; in[15] = mdContext->i[1]; /* compute number of bytes mod 64 */ mdi = (int)((mdContext->i[0] >> 3) & 0x3F); /* pad out to 56 mod 64 */ padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi); MD5Update (mdContext, PADDING, padLen); /* append length in bits and transform */ for (i = 0, ii = 0; i < 14; i++, ii += 4) in[i] = (((UINT4)mdContext->in[ii+3]) << 24) | (((UINT4)mdContext->in[ii+2]) << 16) | (((UINT4)mdContext->in[ii+1]) << 8) | ((UINT4)mdContext->in[ii]); Transform (mdContext->buf, in); /* store buffer in digest */ for (i = 0, ii = 0; i < 4; i++, ii += 4) { mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF); mdContext->digest[ii+1] = (unsigned char)((mdContext->buf[i] >> 8) & 0xFF); mdContext->digest[ii+2] = (unsigned char)((mdContext->buf[i] >> 16) & 0xFF); mdContext->digest[ii+3] = (unsigned char)((mdContext->buf[i] >> 24) & 0xFF); } } /*********************************************************************** ** End of md5.c ** **********************************************************************/ void calculate_md5(const char * src, unsigned int src_size, char * md5buf) { MD5_CTX mdContext; MD5Init(&mdContext); MD5Update(&mdContext, (unsigned char *)src, src_size); MD5Final (&mdContext); memcpy(md5buf, mdContext.digest, 16); }