md5.cpp
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- /*
- Copyright (C) 1999 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 $ */
- /*
- Independent implementation of MD5 (RFC 1321).
- This code implements the MD5 Algorithm defined in RFC 1321.
- It is derived directly from the text of the RFC and not from the
- reference implementation.
- 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):
- 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 "KWin32.h"
- #ifndef TEST
- #include "stdio.h"
- #include "md5.h"
- #include "string.h"
- #endif
- #ifdef TEST
- /*
- * Compile with -DTEST to create a self-contained executable test program.
- * The test program should print out the same values as given in section
- * A.5 of RFC 1321, reproduced below.
- */
- #include "stdio.h"
- #include "md5.h"
- int main(int argc, char *argv[])
- {
- static const char *const test[7] = {
- "", /*d41d8cd98f00b204e9800998ecf8427e*/
- "a", /*0cc175b9c0f1b6a831c399e269772661*/
- "abc", /*900150983cd24fb0d6963f7d28e17f72*/
- "message digest", /*f96b697d7cb7938d525a2f31aaf161d0*/
- "abcdefghijklmnopqrstuvwxyz", /*c3fcd3d76192e4007dfb496cca67e13b*/
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
- /*d174ab98d277d9f5a5611c2c9f419d9f*/
- "12345678901234567890123456789012345678901234567890123456789012345678901234567890" /*57edf4a22be3c955ac49da2e2107b67a*/
- };
- if (argc > 1)
- {
- unsigned char ReadBuffer[65536];
- size_t ReadBytes = 0;
- md5_state_t state;
- md5_byte_t digest[16];
- md5_init(&state);
-
- FILE *fp = fopen(argv[1], "rb");
- if (!fp)
- return -1;
- while (true)
- {
- ReadBytes = fread(ReadBuffer, 1, 65536, fp);
- if (ReadBytes > 0)
- md5_append(&state, (const md5_byte_t *)ReadBuffer, ReadBytes);
- if (feof(fp))
- {
- md5_finish(&state, digest);
- break;
- }
- }
- fclose(fp);
- fp = NULL;
- int i;
- printf("File %s:n", argv[1]);
- printf("MD5 = ");
- for (i = 0; i < 16; i++)
- printf("%02X ", digest[i]);
- printf("n");
- printf("MD5 = ");
- for (i = 0; i < 16; i++)
- printf("%02X", digest[i]);
- printf("n");
-
- return 0;
- }
-
-
- int i;
- for (i = 0; i < 7; ++i) {
- md5_state_t state;
- md5_byte_t digest[16];
- int di;
- md5_init(&state);
- md5_append(&state, (const md5_byte_t *)test[i], strlen(test[i]));
- md5_finish(&state, digest);
- printf("MD5 ("%s") = ", test[i]);
- for (di = 0; di < 16; ++di)
- printf("%02x ", digest[di]);
- printf("n");
- }
- return 0;
- }
- #endif /* TEST */
- /*
- * For reference, here is the program that computed the T values.
- */
- #if 0
- #include <math.h>
- main()
- {
- int i;
- for (i = 1; i <= 64; ++i) {
- unsigned long v = (unsigned long)(4294967296.0 * fabs(sin((double)i)));
- printf("#define T%d 0x%08lxn", i, v);
- }
- return 0;
- }
- #endif
- /*
- * End of T computation program.
- */
- #define T1 0xd76aa478
- #define T2 0xe8c7b756
- #define T3 0x242070db
- #define T4 0xc1bdceee
- #define T5 0xf57c0faf
- #define T6 0x4787c62a
- #define T7 0xa8304613
- #define T8 0xfd469501
- #define T9 0x698098d8
- #define T10 0x8b44f7af
- #define T11 0xffff5bb1
- #define T12 0x895cd7be
- #define T13 0x6b901122
- #define T14 0xfd987193
- #define T15 0xa679438e
- #define T16 0x49b40821
- #define T17 0xf61e2562
- #define T18 0xc040b340
- #define T19 0x265e5a51
- #define T20 0xe9b6c7aa
- #define T21 0xd62f105d
- #define T22 0x02441453
- #define T23 0xd8a1e681
- #define T24 0xe7d3fbc8
- #define T25 0x21e1cde6
- #define T26 0xc33707d6
- #define T27 0xf4d50d87
- #define T28 0x455a14ed
- #define T29 0xa9e3e905
- #define T30 0xfcefa3f8
- #define T31 0x676f02d9
- #define T32 0x8d2a4c8a
- #define T33 0xfffa3942
- #define T34 0x8771f681
- #define T35 0x6d9d6122
- #define T36 0xfde5380c
- #define T37 0xa4beea44
- #define T38 0x4bdecfa9
- #define T39 0xf6bb4b60
- #define T40 0xbebfbc70
- #define T41 0x289b7ec6
- #define T42 0xeaa127fa
- #define T43 0xd4ef3085
- #define T44 0x04881d05
- #define T45 0xd9d4d039
- #define T46 0xe6db99e5
- #define T47 0x1fa27cf8
- #define T48 0xc4ac5665
- #define T49 0xf4292244
- #define T50 0x432aff97
- #define T51 0xab9423a7
- #define T52 0xfc93a039
- #define T53 0x655b59c3
- #define T54 0x8f0ccc92
- #define T55 0xffeff47d
- #define T56 0x85845dd1
- #define T57 0x6fa87e4f
- #define T58 0xfe2ce6e0
- #define T59 0xa3014314
- #define T60 0x4e0811a1
- #define T61 0xf7537e82
- #define T62 0xbd3af235
- #define T63 0x2ad7d2bb
- #define T64 0xeb86d391
- 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;
- #ifndef ARCH_IS_BIG_ENDIAN
- # define ARCH_IS_BIG_ENDIAN 1 /* slower, default implementation */
- #endif
- #if ARCH_IS_BIG_ENDIAN
- /*
- * On big-endian machines, we must arrange the bytes in the right
- * order. (This also works on machines of unknown byte order.)
- */
- md5_word_t X[16];
- const md5_byte_t *xp = data;
- int i;
- for (i = 0; i < 16; ++i, xp += 4)
- X[i] = xp[0] + (xp[1] << 8) + (xp[2] << 16) + (xp[3] << 24);
- #else /* !ARCH_IS_BIG_ENDIAN */
- /*
- * On little-endian machines, we can process properly aligned data
- * without copying it.
- */
- md5_word_t xbuf[16];
- const md5_word_t *X;
- 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
- #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;
- pms->abcd[2] = 0x98badcfe;
- 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);
- 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];
- 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));
- }