md5.c
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer and/or licensor of the Original Code and owns the copyrights
- * in the portions it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- /*
- 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
- */
- /*
- 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 "hxtypes.h"
- #include "md5.h"
- #include "hlxclib/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 int 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); /* Flawfinder: ignore */
- 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;
- int 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, int nbytes)
- {
- const md5_byte_t *p = data;
- int left = nbytes;
- int 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) {
- int copy = (offset + nbytes > 64 ? 64 - offset : nbytes);
- memcpy(pms->buf + offset, p, copy); /* Flawfinder: ignore */
- 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); /* Flawfinder: ignore */
- }
- void
- md5_finish(md5_byte_t digest[16], md5_state_t *pms)
- {
- 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];
- int 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));
- }