395 lines
12 KiB
C
395 lines
12 KiB
C
|
/*
|
||
|
|
* NOTE: I changed "int" to "int32_t" across the board, plus the changes
|
||
|
|
* indicated in md5.h
|
||
|
|
*
|
||
|
|
* Claudio Leite
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (C) 1999, 2000, 2002 Aladdin Enterprises. All rights reserved.
|
||
|
|
*
|
||
|
|
* This software is provided 'as-is', without any express or implied warranty.
|
||
|
|
* In no event will the authors be held liable for any damages arising from
|
||
|
|
* the use of this software.
|
||
|
|
*
|
||
|
|
* Permission is granted to anyone to use this software for any purpose,
|
||
|
|
* including commercial applications, and to alter it and redistribute it
|
||
|
|
* freely, subject to the following restrictions:
|
||
|
|
*
|
||
|
|
* 1. The origin of this software must not be misrepresented; you must not claim
|
||
|
|
* that you wrote the original software. If you use this software in a
|
||
|
|
* product, an acknowledgment in the product documentation would be
|
||
|
|
* appreciated but is not required. 2. Altered source versions must be
|
||
|
|
* plainly marked as such, and must not be misrepresented as being the
|
||
|
|
* original software. 3. This notice may not be removed or altered from any
|
||
|
|
* source distribution.
|
||
|
|
*
|
||
|
|
* L. Peter Deutsch ghost@aladdin.com
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
/* $Id: md5.c,v 1.8 2007/09/15 14:52:24 leitec Exp $ */
|
||
|
|
/*
|
||
|
|
* Independent implementation of MD5 (RFC 1321).
|
||
|
|
*
|
||
|
|
* This code implements the MD5 Algorithm defined in RFC 1321, whose text is
|
||
|
|
* available at http://www.ietf.org/rfc/rfc1321.txt The code is derived from
|
||
|
|
* the text of the RFC, including the test suite (section A.5) but excluding
|
||
|
|
* the rest of Appendix A. It does not include any code or documentation
|
||
|
|
* that is identified in the RFC as being copyrighted.
|
||
|
|
*
|
||
|
|
* The original and principal author of md5.c is L. Peter Deutsch
|
||
|
|
* <ghost@aladdin.com>. Other authors are noted in the change history that
|
||
|
|
* follows (in reverse chronological order):
|
||
|
|
*
|
||
|
|
* 2002-04-13 lpd Clarified derivation from RFC 1321; now handles byte order
|
||
|
|
* either statically or dynamically; added missing #include <string.h> in
|
||
|
|
* library. 2002-03-11 lpd Corrected argument list for main(), and added int
|
||
|
|
* return type, in test program and T value program. 2002-02-21 lpd Added
|
||
|
|
* missing #include <stdio.h> in test program. 2000-07-03 lpd Patched to
|
||
|
|
* eliminate warnings about "constant is unsigned in ANSI C, signed in
|
||
|
|
* traditional"; made test program self-checking. 1999-11-04 lpd Edited
|
||
|
|
* comments slightly for automatic TOC extraction. 1999-10-18 lpd Fixed typo
|
||
|
|
* in header comment (ansi2knr rather than md5). 1999-05-03 lpd Original
|
||
|
|
* version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "md5.h"
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#undef BYTE_ORDER /* 1 = big-endian, -1 = little-endian, 0 =
|
||
|
|
* unknown */
|
||
|
|
#ifdef ARCH_IS_BIG_ENDIAN
|
||
|
|
#define BYTE_ORDER (ARCH_IS_BIG_ENDIAN ? 1 : -1)
|
||
|
|
#else
|
||
|
|
#define BYTE_ORDER 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define T_MASK ((md5_word_t)~0)
|
||
|
|
#define T1 /* 0xd76aa478 */ (T_MASK ^ 0x28955b87)
|
||
|
|
#define T2 /* 0xe8c7b756 */ (T_MASK ^ 0x173848a9)
|
||
|
|
#define T3 0x242070db
|
||
|
|
#define T4 /* 0xc1bdceee */ (T_MASK ^ 0x3e423111)
|
||
|
|
#define T5 /* 0xf57c0faf */ (T_MASK ^ 0x0a83f050)
|
||
|
|
#define T6 0x4787c62a
|
||
|
|
#define T7 /* 0xa8304613 */ (T_MASK ^ 0x57cfb9ec)
|
||
|
|
#define T8 /* 0xfd469501 */ (T_MASK ^ 0x02b96afe)
|
||
|
|
#define T9 0x698098d8
|
||
|
|
#define T10 /* 0x8b44f7af */ (T_MASK ^ 0x74bb0850)
|
||
|
|
#define T11 /* 0xffff5bb1 */ (T_MASK ^ 0x0000a44e)
|
||
|
|
#define T12 /* 0x895cd7be */ (T_MASK ^ 0x76a32841)
|
||
|
|
#define T13 0x6b901122
|
||
|
|
#define T14 /* 0xfd987193 */ (T_MASK ^ 0x02678e6c)
|
||
|
|
#define T15 /* 0xa679438e */ (T_MASK ^ 0x5986bc71)
|
||
|
|
#define T16 0x49b40821
|
||
|
|
#define T17 /* 0xf61e2562 */ (T_MASK ^ 0x09e1da9d)
|
||
|
|
#define T18 /* 0xc040b340 */ (T_MASK ^ 0x3fbf4cbf)
|
||
|
|
#define T19 0x265e5a51
|
||
|
|
#define T20 /* 0xe9b6c7aa */ (T_MASK ^ 0x16493855)
|
||
|
|
#define T21 /* 0xd62f105d */ (T_MASK ^ 0x29d0efa2)
|
||
|
|
#define T22 0x02441453
|
||
|
|
#define T23 /* 0xd8a1e681 */ (T_MASK ^ 0x275e197e)
|
||
|
|
#define T24 /* 0xe7d3fbc8 */ (T_MASK ^ 0x182c0437)
|
||
|
|
#define T25 0x21e1cde6
|
||
|
|
#define T26 /* 0xc33707d6 */ (T_MASK ^ 0x3cc8f829)
|
||
|
|
#define T27 /* 0xf4d50d87 */ (T_MASK ^ 0x0b2af278)
|
||
|
|
#define T28 0x455a14ed
|
||
|
|
#define T29 /* 0xa9e3e905 */ (T_MASK ^ 0x561c16fa)
|
||
|
|
#define T30 /* 0xfcefa3f8 */ (T_MASK ^ 0x03105c07)
|
||
|
|
#define T31 0x676f02d9
|
||
|
|
#define T32 /* 0x8d2a4c8a */ (T_MASK ^ 0x72d5b375)
|
||
|
|
#define T33 /* 0xfffa3942 */ (T_MASK ^ 0x0005c6bd)
|
||
|
|
#define T34 /* 0x8771f681 */ (T_MASK ^ 0x788e097e)
|
||
|
|
#define T35 0x6d9d6122
|
||
|
|
#define T36 /* 0xfde5380c */ (T_MASK ^ 0x021ac7f3)
|
||
|
|
#define T37 /* 0xa4beea44 */ (T_MASK ^ 0x5b4115bb)
|
||
|
|
#define T38 0x4bdecfa9
|
||
|
|
#define T39 /* 0xf6bb4b60 */ (T_MASK ^ 0x0944b49f)
|
||
|
|
#define T40 /* 0xbebfbc70 */ (T_MASK ^ 0x4140438f)
|
||
|
|
#define T41 0x289b7ec6
|
||
|
|
#define T42 /* 0xeaa127fa */ (T_MASK ^ 0x155ed805)
|
||
|
|
#define T43 /* 0xd4ef3085 */ (T_MASK ^ 0x2b10cf7a)
|
||
|
|
#define T44 0x04881d05
|
||
|
|
#define T45 /* 0xd9d4d039 */ (T_MASK ^ 0x262b2fc6)
|
||
|
|
#define T46 /* 0xe6db99e5 */ (T_MASK ^ 0x1924661a)
|
||
|
|
#define T47 0x1fa27cf8
|
||
|
|
#define T48 /* 0xc4ac5665 */ (T_MASK ^ 0x3b53a99a)
|
||
|
|
#define T49 /* 0xf4292244 */ (T_MASK ^ 0x0bd6ddbb)
|
||
|
|
#define T50 0x432aff97
|
||
|
|
#define T51 /* 0xab9423a7 */ (T_MASK ^ 0x546bdc58)
|
||
|
|
#define T52 /* 0xfc93a039 */ (T_MASK ^ 0x036c5fc6)
|
||
|
|
#define T53 0x655b59c3
|
||
|
|
#define T54 /* 0x8f0ccc92 */ (T_MASK ^ 0x70f3336d)
|
||
|
|
#define T55 /* 0xffeff47d */ (T_MASK ^ 0x00100b82)
|
||
|
|
#define T56 /* 0x85845dd1 */ (T_MASK ^ 0x7a7ba22e)
|
||
|
|
#define T57 0x6fa87e4f
|
||
|
|
#define T58 /* 0xfe2ce6e0 */ (T_MASK ^ 0x01d3191f)
|
||
|
|
#define T59 /* 0xa3014314 */ (T_MASK ^ 0x5cfebceb)
|
||
|
|
#define T60 0x4e0811a1
|
||
|
|
#define T61 /* 0xf7537e82 */ (T_MASK ^ 0x08ac817d)
|
||
|
|
#define T62 /* 0xbd3af235 */ (T_MASK ^ 0x42c50dca)
|
||
|
|
#define T63 0x2ad7d2bb
|
||
|
|
#define T64 /* 0xeb86d391 */ (T_MASK ^ 0x14792c6e)
|
||
|
|
|
||
|
|
|
||
|
|
static void
|
||
|
|
md5_process(md5_state_t * pms, const md5_byte_t * data /* [64] */ )
|
||
|
|
{
|
||
|
|
md5_word_t a = pms->abcd[0], b = pms->abcd[1], c = pms->abcd[2], d =
|
||
|
|
pms->abcd[3];
|
||
|
|
md5_word_t t;
|
||
|
|
#if BYTE_ORDER > 0
|
||
|
|
/* Define storage only for big-endian CPUs. */
|
||
|
|
md5_word_t X[16];
|
||
|
|
#else
|
||
|
|
/* Define storage for little-endian or both types of CPUs. */
|
||
|
|
md5_word_t xbuf[16];
|
||
|
|
const md5_word_t *X;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
{
|
||
|
|
#if BYTE_ORDER == 0
|
||
|
|
/*
|
||
|
|
* Determine dynamically whether this is a big-endian or
|
||
|
|
* little-endian machine, since we can use a more efficient
|
||
|
|
* algorithm on the latter.
|
||
|
|
*/
|
||
|
|
static const int32_t w = 1;
|
||
|
|
|
||
|
|
if (*((const md5_byte_t *) & w)) /* dynamic little-endian */
|
||
|
|
#endif
|
||
|
|
#if BYTE_ORDER <= 0 /* little-endian */
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* On little-endian machines, we can process properly
|
||
|
|
* aligned data without copying it.
|
||
|
|
*/
|
||
|
|
if (!((data - (const md5_byte_t *) 0) & 3)) {
|
||
|
|
/* data are properly aligned */
|
||
|
|
X = (const md5_word_t *) data;
|
||
|
|
} else {
|
||
|
|
/* not aligned */
|
||
|
|
memcpy(xbuf, data, 64);
|
||
|
|
X = xbuf;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#if BYTE_ORDER == 0
|
||
|
|
else /* dynamic big-endian */
|
||
|
|
#endif
|
||
|
|
#if BYTE_ORDER >= 0 /* big-endian */
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* On big-endian machines, we must arrange the bytes
|
||
|
|
* in the right order.
|
||
|
|
*/
|
||
|
|
const md5_byte_t *xp = data;
|
||
|
|
int32_t i;
|
||
|
|
|
||
|
|
#if BYTE_ORDER == 0
|
||
|
|
X = xbuf; /* (dynamic only) */
|
||
|
|
#else
|
||
|
|
#define xbuf X /* (static only) */
|
||
|
|
#endif
|
||
|
|
for (i = 0; i < 16; ++i, xp += 4)
|
||
|
|
xbuf[i] =
|
||
|
|
xp[0] + (xp[1] << 8) + (xp[2] << 16) + (xp[3] << 24);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
|
||
|
|
|
||
|
|
/* Round 1. */
|
||
|
|
/*
|
||
|
|
* Let [abcd k s i] denote the operation a = b + ((a + F(b,c,d) +
|
||
|
|
* X[k] + T[i]) <<< s).
|
||
|
|
*/
|
||
|
|
#define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
|
||
|
|
#define SET(a, b, c, d, k, s, Ti)\
|
||
|
|
t = a + F(b,c,d) + X[k] + Ti;\
|
||
|
|
a = ROTATE_LEFT(t, s) + b
|
||
|
|
/* Do the following 16 operations. */
|
||
|
|
SET(a, b, c, d, 0, 7, T1);
|
||
|
|
SET(d, a, b, c, 1, 12, T2);
|
||
|
|
SET(c, d, a, b, 2, 17, T3);
|
||
|
|
SET(b, c, d, a, 3, 22, T4);
|
||
|
|
SET(a, b, c, d, 4, 7, T5);
|
||
|
|
SET(d, a, b, c, 5, 12, T6);
|
||
|
|
SET(c, d, a, b, 6, 17, T7);
|
||
|
|
SET(b, c, d, a, 7, 22, T8);
|
||
|
|
SET(a, b, c, d, 8, 7, T9);
|
||
|
|
SET(d, a, b, c, 9, 12, T10);
|
||
|
|
SET(c, d, a, b, 10, 17, T11);
|
||
|
|
SET(b, c, d, a, 11, 22, T12);
|
||
|
|
SET(a, b, c, d, 12, 7, T13);
|
||
|
|
SET(d, a, b, c, 13, 12, T14);
|
||
|
|
SET(c, d, a, b, 14, 17, T15);
|
||
|
|
SET(b, c, d, a, 15, 22, T16);
|
||
|
|
#undef SET
|
||
|
|
|
||
|
|
/* Round 2. */
|
||
|
|
/*
|
||
|
|
* Let [abcd k s i] denote the operation a = b + ((a + G(b,c,d) +
|
||
|
|
* X[k] + T[i]) <<< s).
|
||
|
|
*/
|
||
|
|
#define G(x, y, z) (((x) & (z)) | ((y) & ~(z)))
|
||
|
|
#define SET(a, b, c, d, k, s, Ti)\
|
||
|
|
t = a + G(b,c,d) + X[k] + Ti;\
|
||
|
|
a = ROTATE_LEFT(t, s) + b
|
||
|
|
/* Do the following 16 operations. */
|
||
|
|
SET(a, b, c, d, 1, 5, T17);
|
||
|
|
SET(d, a, b, c, 6, 9, T18);
|
||
|
|
SET(c, d, a, b, 11, 14, T19);
|
||
|
|
SET(b, c, d, a, 0, 20, T20);
|
||
|
|
SET(a, b, c, d, 5, 5, T21);
|
||
|
|
SET(d, a, b, c, 10, 9, T22);
|
||
|
|
SET(c, d, a, b, 15, 14, T23);
|
||
|
|
SET(b, c, d, a, 4, 20, T24);
|
||
|
|
SET(a, b, c, d, 9, 5, T25);
|
||
|
|
SET(d, a, b, c, 14, 9, T26);
|
||
|
|
SET(c, d, a, b, 3, 14, T27);
|
||
|
|
SET(b, c, d, a, 8, 20, T28);
|
||
|
|
SET(a, b, c, d, 13, 5, T29);
|
||
|
|
SET(d, a, b, c, 2, 9, T30);
|
||
|
|
SET(c, d, a, b, 7, 14, T31);
|
||
|
|
SET(b, c, d, a, 12, 20, T32);
|
||
|
|
#undef SET
|
||
|
|
|
||
|
|
/* Round 3. */
|
||
|
|
/*
|
||
|
|
* Let [abcd k s t] denote the operation a = b + ((a + H(b,c,d) +
|
||
|
|
* X[k] + T[i]) <<< s).
|
||
|
|
*/
|
||
|
|
#define H(x, y, z) ((x) ^ (y) ^ (z))
|
||
|
|
#define SET(a, b, c, d, k, s, Ti)\
|
||
|
|
t = a + H(b,c,d) + X[k] + Ti;\
|
||
|
|
a = ROTATE_LEFT(t, s) + b
|
||
|
|
/* Do the following 16 operations. */
|
||
|
|
SET(a, b, c, d, 5, 4, T33);
|
||
|
|
SET(d, a, b, c, 8, 11, T34);
|
||
|
|
SET(c, d, a, b, 11, 16, T35);
|
||
|
|
SET(b, c, d, a, 14, 23, T36);
|
||
|
|
SET(a, b, c, d, 1, 4, T37);
|
||
|
|
SET(d, a, b, c, 4, 11, T38);
|
||
|
|
SET(c, d, a, b, 7, 16, T39);
|
||
|
|
SET(b, c, d, a, 10, 23, T40);
|
||
|
|
SET(a, b, c, d, 13, 4, T41);
|
||
|
|
SET(d, a, b, c, 0, 11, T42);
|
||
|
|
SET(c, d, a, b, 3, 16, T43);
|
||
|
|
SET(b, c, d, a, 6, 23, T44);
|
||
|
|
SET(a, b, c, d, 9, 4, T45);
|
||
|
|
SET(d, a, b, c, 12, 11, T46);
|
||
|
|
SET(c, d, a, b, 15, 16, T47);
|
||
|
|
SET(b, c, d, a, 2, 23, T48);
|
||
|
|
#undef SET
|
||
|
|
|
||
|
|
/* Round 4. */
|
||
|
|
/*
|
||
|
|
* Let [abcd k s t] denote the operation a = b + ((a + I(b,c,d) +
|
||
|
|
* X[k] + T[i]) <<< s).
|
||
|
|
*/
|
||
|
|
#define I(x, y, z) ((y) ^ ((x) | ~(z)))
|
||
|
|
#define SET(a, b, c, d, k, s, Ti)\
|
||
|
|
t = a + I(b,c,d) + X[k] + Ti;\
|
||
|
|
a = ROTATE_LEFT(t, s) + b
|
||
|
|
/* Do the following 16 operations. */
|
||
|
|
SET(a, b, c, d, 0, 6, T49);
|
||
|
|
SET(d, a, b, c, 7, 10, T50);
|
||
|
|
SET(c, d, a, b, 14, 15, T51);
|
||
|
|
SET(b, c, d, a, 5, 21, T52);
|
||
|
|
SET(a, b, c, d, 12, 6, T53);
|
||
|
|
SET(d, a, b, c, 3, 10, T54);
|
||
|
|
SET(c, d, a, b, 10, 15, T55);
|
||
|
|
SET(b, c, d, a, 1, 21, T56);
|
||
|
|
SET(a, b, c, d, 8, 6, T57);
|
||
|
|
SET(d, a, b, c, 15, 10, T58);
|
||
|
|
SET(c, d, a, b, 6, 15, T59);
|
||
|
|
SET(b, c, d, a, 13, 21, T60);
|
||
|
|
SET(a, b, c, d, 4, 6, T61);
|
||
|
|
SET(d, a, b, c, 11, 10, T62);
|
||
|
|
SET(c, d, a, b, 2, 15, T63);
|
||
|
|
SET(b, c, d, a, 9, 21, T64);
|
||
|
|
#undef SET
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Then perform the following additions. (That is increment each of
|
||
|
|
* the four registers by the value it had before this block was
|
||
|
|
* started.)
|
||
|
|
*/
|
||
|
|
pms->abcd[0] += a;
|
||
|
|
pms->abcd[1] += b;
|
||
|
|
pms->abcd[2] += c;
|
||
|
|
pms->abcd[3] += d;
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
md5_init(md5_state_t * pms)
|
||
|
|
{
|
||
|
|
pms->count[0] = pms->count[1] = 0;
|
||
|
|
pms->abcd[0] = 0x67452301;
|
||
|
|
pms->abcd[1] = /* 0xefcdab89 */ T_MASK ^ 0x10325476;
|
||
|
|
pms->abcd[2] = /* 0x98badcfe */ T_MASK ^ 0x67452301;
|
||
|
|
pms->abcd[3] = 0x10325476;
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
md5_append(md5_state_t * pms, const md5_byte_t * data, int32_t nbytes)
|
||
|
|
{
|
||
|
|
const md5_byte_t *p = data;
|
||
|
|
int32_t left = nbytes;
|
||
|
|
int32_t offset = (pms->count[0] >> 3) & 63;
|
||
|
|
md5_word_t nbits = (md5_word_t) (nbytes << 3);
|
||
|
|
|
||
|
|
if (nbytes <= 0)
|
||
|
|
return;
|
||
|
|
|
||
|
|
/* Update the message length. */
|
||
|
|
pms->count[1] += nbytes >> 29;
|
||
|
|
pms->count[0] += nbits;
|
||
|
|
if (pms->count[0] < nbits)
|
||
|
|
pms->count[1]++;
|
||
|
|
|
||
|
|
/* Process an initial partial block. */
|
||
|
|
if (offset) {
|
||
|
|
int32_t copy =
|
||
|
|
(offset + nbytes > 64 ? 64 - offset : nbytes);
|
||
|
|
|
||
|
|
memcpy(pms->buf + offset, p, copy);
|
||
|
|
if (offset + copy < 64)
|
||
|
|
return;
|
||
|
|
p += copy;
|
||
|
|
left -= copy;
|
||
|
|
md5_process(pms, pms->buf);
|
||
|
|
}
|
||
|
|
/* Process full blocks. */
|
||
|
|
for (; left >= 64; p += 64, left -= 64)
|
||
|
|
md5_process(pms, p);
|
||
|
|
|
||
|
|
/* Process a final partial block. */
|
||
|
|
if (left)
|
||
|
|
memcpy(pms->buf, p, left);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
md5_finish(md5_state_t * pms, md5_byte_t digest[16])
|
||
|
|
{
|
||
|
|
static const md5_byte_t pad[64] = {
|
||
|
|
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
||
|
|
};
|
||
|
|
md5_byte_t data[8];
|
||
|
|
int32_t i;
|
||
|
|
|
||
|
|
/* Save the length before padding. */
|
||
|
|
for (i = 0; i < 8; ++i)
|
||
|
|
data[i] = (md5_byte_t) (pms->count[i >> 2] >> ((i & 3) << 3));
|
||
|
|
/* Pad to 56 bytes mod 64. */
|
||
|
|
md5_append(pms, pad, ((55 - (pms->count[0] >> 3)) & 63) + 1);
|
||
|
|
/* Append the length. */
|
||
|
|
md5_append(pms, data, 8);
|
||
|
|
for (i = 0; i < 16; ++i)
|
||
|
|
digest[i] = (md5_byte_t) (pms->abcd[i >> 2] >> ((i & 3) << 3));
|
||
|
|
}
|