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Diffstat (limited to 'library/md5.c')
| -rw-r--r-- | library/md5.c | 650 |
1 files changed, 0 insertions, 650 deletions
diff --git a/library/md5.c b/library/md5.c deleted file mode 100644 index 041860b4..00000000 --- a/library/md5.c +++ /dev/null @@ -1,650 +0,0 @@ -/* - * Functions to compute MD5 message digest of files or memory blocks - * according to the definition of MD5 in RFC 1321 from April 1992. - * Copyright (C) 1995, 1996 Free Software Foundation, Inc. NOTE: The - * canonical source of this file is maintained with the GNU C Library. - * Bugs can be reported to bug-glibc@prep.ai.mit.edu. - * - * 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, 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. - * - * Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. - * Modified by Gray Watson <http://256.com/gray/>, 1997. - * - * $Id: md5.c,v 1.7 2006/03/05 15:38:09 gray Exp $ - */ - -/* - * NOTE: during quick performance tests on a Sun Sparc Ultra 1 and an - * Alpha 255 300, these functions performed upwards of 3mb/sec - * including disk I/O time. - */ - -/* - * MD5 Test Suite from RFC1321: http://ds.internic.net:/rfc/rfc1321.txt - * - * MD5 ("") = d41d8cd98f00b204e9800998ecf8427e - * MD5 ("a") = 0cc175b9c0f1b6a831c399e269772661 - * MD5 ("abc") = 900150983cd24fb0d6963f7d28e17f72 - * MD5 ("message digest") = f96b697d7cb7938d525a2f31aaf161d0 - * MD5 ("abcdefghijklmnopqrstuvwxyz") = c3fcd3d76192e4007dfb496cca67e13b - * MD5 ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789") = - * d174ab98d277d9f5a5611c2c9f419d9f - * MD5 ("123456789012345678901234567890123456789012345678901234567890123456 - * 78901234567890") = 57edf4a22be3c955ac49da2e2107b67a - */ - -#include <stdlib.h> -#include <string.h> -#include <sys/types.h> -#include "md5.h" - -#define HEX_STRING "0123456789abcdef" /* to convert to hex */ -#define BLOCK_SIZE_MASK (MD5_BLOCK_SIZE - 1) - -/* - * Define my endian-ness. Could not do in a portable manner using the - * include files -- grumble. - */ -#if defined(__alpha) || defined(WIN32) || defined(__i386__) -/* - * little endian - */ -#define SWAP(n) (n) -#endif - -#if defined(__sparc) || defined(__powerpc__) -/* - * big endian - big is better - */ -#define SWAP(n) \ - (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24)) -#endif - -/* - * These are the four functions used in the four steps of the MD5 - * algorithm and defined in the RFC 1321. The first function is a - * little bit optimized (as found in Colin Plumbs public domain - * implementation). - */ -/* #define FF(b, c, d) ((b & c) | (~b & d)) */ -#define FF(b, c, d) (d ^ (b & (c ^ d))) -#define FG(b, c, d) FF(d, b, c) -#define FH(b, c, d) (b ^ c ^ d) -#define FI(b, c, d) (c ^ (b | ~d)) - -/* - * It is unfortunate that C does not provide an operator for cyclic - * rotation. Hope the C compiler is smart enough. -- Modified to - * remove the w = at the front - Gray 2/97 - */ -#define CYCLIC(w, s) ((w << s) | (w >> (32 - s))) - -/* - * First Round: using the given function, the context and a constant - * the next context is computed. Because the algorithms processing - * unit is a 32-bit word and it is determined to work on words in - * little endian byte order we perhaps have to change the byte order - * before the computation. To reduce the work for the next steps we - * store the swapped words in the array CORRECT_WORDS. -- Modified to - * fix the handling of unaligned buffer spaces - Gray 7/97 - */ -#define OP1(a, b, c, d, b_p, c_p, s, T) \ - do { \ - memcpy(c_p, b_p, sizeof(md5_uint32)); \ - *c_p = SWAP(*c_p); \ - a += FF (b, c, d) + *c_p + T; \ - a = CYCLIC (a, s); \ - a += b; \ - b_p = (char *)b_p + sizeof(md5_uint32); \ - c_p++; \ - } while (0) - -/* - * Second to Fourth Round: we have the possibly swapped words in - * CORRECT_WORDS. Redefine the macro to take an additional first - * argument specifying the function to use. - */ -#define OP234(FUNC, a, b, c, d, k, s, T) \ - do { \ - a += FUNC (b, c, d) + k + T; \ - a = CYCLIC (a, s); \ - a += b; \ - } while (0) - -/****************************** local routines *******************************/ - -/* - * process_block - * - * DESCRIPTION: - * - * Process a block of bytes into a MD5 state structure. - * - * RETURNS: - * - * None. - * - * ARGUMENTS: - * - * md5_p - Pointer to MD5 structure from which we are getting the result. - * - * buffer - A buffer of bytes whose MD5 signature we are calculating. - * - * buf_len - The length of the buffer. - */ -static void process_block(md5_t *md5_p, const void *buffer, - const unsigned int buf_len) -{ - md5_uint32 correct[16]; - const void *buf_p = buffer, *end_p; - unsigned int words_n; - md5_uint32 A, B, C, D; - - words_n = buf_len / sizeof(md5_uint32); - end_p = (char *)buf_p + words_n * sizeof(md5_uint32); - - A = md5_p->md_A; - B = md5_p->md_B; - C = md5_p->md_C; - D = md5_p->md_D; - - /* - * First increment the byte count. RFC 1321 specifies the possible - * length of the file up to 2^64 bits. Here we only compute the - * number of bytes with a double word increment. Modified to do - * this to better avoid overflows in the lower word -- Gray 10/97. - */ - if (md5_p->md_total[0] > MAX_MD5_UINT32 - buf_len) - { - md5_p->md_total[1]++; - md5_p->md_total[0] -= (MAX_MD5_UINT32 + 1 - buf_len); - } - else - { - md5_p->md_total[0] += buf_len; - } - - /* - * Process all bytes in the buffer with MD5_BLOCK bytes in each - * round of the loop. - */ - while (buf_p < end_p) - { - md5_uint32 A_save, B_save, C_save, D_save; - md5_uint32 *corr_p = correct; - - A_save = A; - B_save = B; - C_save = C; - D_save = D; - - /* - * Before we start, one word to the strange constants. They are - * defined in RFC 1321 as - * - * T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..MD5_BLOCK - */ - - /* Round 1. */ - OP1 (A, B, C, D, buf_p, corr_p, 7, 0xd76aa478); - OP1 (D, A, B, C, buf_p, corr_p, 12, 0xe8c7b756); - OP1 (C, D, A, B, buf_p, corr_p, 17, 0x242070db); - OP1 (B, C, D, A, buf_p, corr_p, 22, 0xc1bdceee); - OP1 (A, B, C, D, buf_p, corr_p, 7, 0xf57c0faf); - OP1 (D, A, B, C, buf_p, corr_p, 12, 0x4787c62a); - OP1 (C, D, A, B, buf_p, corr_p, 17, 0xa8304613); - OP1 (B, C, D, A, buf_p, corr_p, 22, 0xfd469501); - OP1 (A, B, C, D, buf_p, corr_p, 7, 0x698098d8); - OP1 (D, A, B, C, buf_p, corr_p, 12, 0x8b44f7af); - OP1 (C, D, A, B, buf_p, corr_p, 17, 0xffff5bb1); - OP1 (B, C, D, A, buf_p, corr_p, 22, 0x895cd7be); - OP1 (A, B, C, D, buf_p, corr_p, 7, 0x6b901122); - OP1 (D, A, B, C, buf_p, corr_p, 12, 0xfd987193); - OP1 (C, D, A, B, buf_p, corr_p, 17, 0xa679438e); - OP1 (B, C, D, A, buf_p, corr_p, 22, 0x49b40821); - - /* Round 2. */ - OP234 (FG, A, B, C, D, correct[ 1], 5, 0xf61e2562); - OP234 (FG, D, A, B, C, correct[ 6], 9, 0xc040b340); - OP234 (FG, C, D, A, B, correct[ 11], 14, 0x265e5a51); - OP234 (FG, B, C, D, A, correct[ 0], 20, 0xe9b6c7aa); - OP234 (FG, A, B, C, D, correct[ 5], 5, 0xd62f105d); - OP234 (FG, D, A, B, C, correct[ 10], 9, 0x02441453); - OP234 (FG, C, D, A, B, correct[ 15], 14, 0xd8a1e681); - OP234 (FG, B, C, D, A, correct[ 4], 20, 0xe7d3fbc8); - OP234 (FG, A, B, C, D, correct[ 9], 5, 0x21e1cde6); - OP234 (FG, D, A, B, C, correct[ 14], 9, 0xc33707d6); - OP234 (FG, C, D, A, B, correct[ 3], 14, 0xf4d50d87); - OP234 (FG, B, C, D, A, correct[ 8], 20, 0x455a14ed); - OP234 (FG, A, B, C, D, correct[ 13], 5, 0xa9e3e905); - OP234 (FG, D, A, B, C, correct[ 2], 9, 0xfcefa3f8); - OP234 (FG, C, D, A, B, correct[ 7], 14, 0x676f02d9); - OP234 (FG, B, C, D, A, correct[ 12], 20, 0x8d2a4c8a); - - /* Round 3. */ - OP234 (FH, A, B, C, D, correct[ 5], 4, 0xfffa3942); - OP234 (FH, D, A, B, C, correct[ 8], 11, 0x8771f681); - OP234 (FH, C, D, A, B, correct[ 11], 16, 0x6d9d6122); - OP234 (FH, B, C, D, A, correct[ 14], 23, 0xfde5380c); - OP234 (FH, A, B, C, D, correct[ 1], 4, 0xa4beea44); - OP234 (FH, D, A, B, C, correct[ 4], 11, 0x4bdecfa9); - OP234 (FH, C, D, A, B, correct[ 7], 16, 0xf6bb4b60); - OP234 (FH, B, C, D, A, correct[ 10], 23, 0xbebfbc70); - OP234 (FH, A, B, C, D, correct[ 13], 4, 0x289b7ec6); - OP234 (FH, D, A, B, C, correct[ 0], 11, 0xeaa127fa); - OP234 (FH, C, D, A, B, correct[ 3], 16, 0xd4ef3085); - OP234 (FH, B, C, D, A, correct[ 6], 23, 0x04881d05); - OP234 (FH, A, B, C, D, correct[ 9], 4, 0xd9d4d039); - OP234 (FH, D, A, B, C, correct[ 12], 11, 0xe6db99e5); - OP234 (FH, C, D, A, B, correct[ 15], 16, 0x1fa27cf8); - OP234 (FH, B, C, D, A, correct[ 2], 23, 0xc4ac5665); - - /* Round 4. */ - OP234 (FI, A, B, C, D, correct[ 0], 6, 0xf4292244); - OP234 (FI, D, A, B, C, correct[ 7], 10, 0x432aff97); - OP234 (FI, C, D, A, B, correct[ 14], 15, 0xab9423a7); - OP234 (FI, B, C, D, A, correct[ 5], 21, 0xfc93a039); - OP234 (FI, A, B, C, D, correct[ 12], 6, 0x655b59c3); - OP234 (FI, D, A, B, C, correct[ 3], 10, 0x8f0ccc92); - OP234 (FI, C, D, A, B, correct[ 10], 15, 0xffeff47d); - OP234 (FI, B, C, D, A, correct[ 1], 21, 0x85845dd1); - OP234 (FI, A, B, C, D, correct[ 8], 6, 0x6fa87e4f); - OP234 (FI, D, A, B, C, correct[ 15], 10, 0xfe2ce6e0); - OP234 (FI, C, D, A, B, correct[ 6], 15, 0xa3014314); - OP234 (FI, B, C, D, A, correct[ 13], 21, 0x4e0811a1); - OP234 (FI, A, B, C, D, correct[ 4], 6, 0xf7537e82); - OP234 (FI, D, A, B, C, correct[ 11], 10, 0xbd3af235); - OP234 (FI, C, D, A, B, correct[ 2], 15, 0x2ad7d2bb); - OP234 (FI, B, C, D, A, correct[ 9], 21, 0xeb86d391); - - /* Add the starting values of the context. */ - A += A_save; - B += B_save; - C += C_save; - D += D_save; - } - - /* Put checksum in context given as argument. */ - md5_p->md_A = A; - md5_p->md_B = B; - md5_p->md_C = C; - md5_p->md_D = D; -} - -/* - * md5_get_result - * - * DESCRIPTION: - * - * Copy the resulting MD5 signature from MD5_P into the first 16 bytes - * (MD5_SIZE) of the result buffer. - * - * RETURNS: - * - * None. - * - * ARGUMENTS: - * - * md5_p - Pointer to MD5 structure from which we are getting the result. - * - * result - A 16 byte buffer that will contain the MD5 signature. - */ -static void md5_get_result(const md5_t *md5_p, void *result) -{ - md5_uint32 hold; - void *res_p = result; - - hold = SWAP(md5_p->md_A); - memcpy(res_p, &hold, sizeof(md5_uint32)); - res_p = (char *)res_p + sizeof(md5_uint32); - - hold = SWAP(md5_p->md_B); - memcpy(res_p, &hold, sizeof(md5_uint32)); - res_p = (char *)res_p + sizeof(md5_uint32); - - hold = SWAP(md5_p->md_C); - memcpy(res_p, &hold, sizeof(md5_uint32)); - res_p = (char *)res_p + sizeof(md5_uint32); - - hold = SWAP(md5_p->md_D); - memcpy(res_p, &hold, sizeof(md5_uint32)); -} - -/***************************** exported routines *****************************/ - -/* - * md5_init - * - * DESCRIPTION: - * - * Initialize structure containing state of MD5 computation. (RFC 1321, - * 3.3: Step 3). This is for progressive MD5 calculations only. If - * you have the complete string available, md5_buffer should be used. - * md5_process should be called for each bunch of bytes and after the - * last process call, md5_finish should be called to get the - * signature. - * - * RETURNS: - * - * None. - * - * ARGUMENTS: - * - * md5_p - Pointer to md5 structure that we are initializing. - */ -void md5_init(md5_t *md5_p) -{ - md5_p->md_A = 0x67452301; - md5_p->md_B = 0xefcdab89; - md5_p->md_C = 0x98badcfe; - md5_p->md_D = 0x10325476; - - md5_p->md_total[0] = 0; - md5_p->md_total[1] = 0; - md5_p->md_buf_len = 0; -} - -/* - * md5_process - * - * DESCRIPTION: - * - * This function is used to progressively calculate a MD5 signature some - * number of bytes at a time. If you have the complete string - * available, md5_buffer should be used. The MD5 structure should - * have been initialized with md5_init and after the last process - * call, md5_finish should be called to get the results. - * - * RETURNS: - * - * None. - * - * ARGUMENTS: - * - * md5_p - Pointer to MD5 structure which we are progressively updating. - * - * buffer - A buffer of bytes whose MD5 signature we are calculating. - * - * buf_len - The length of the buffer. - */ -void md5_process(md5_t *md5_p, const void *buffer, - const unsigned int buf_len) -{ - unsigned int len = buf_len; - unsigned int in_block, add; - - /* - * When we already have some bytes in our internal buffer, copy some - * from the user to fill the block. - */ - if (md5_p->md_buf_len > 0) - { - - in_block = md5_p->md_buf_len; - if (in_block + len > sizeof(md5_p->md_buffer)) - { - add = sizeof(md5_p->md_buffer) - in_block; - } - else - { - add = len; - } - - memcpy (md5_p->md_buffer + in_block, buffer, add); - md5_p->md_buf_len += add; - in_block += add; - - if (in_block > MD5_BLOCK_SIZE) - { - process_block (md5_p, md5_p->md_buffer, in_block & ~BLOCK_SIZE_MASK); - /* the regions in the following copy operation will not overlap. */ - memcpy (md5_p->md_buffer, - md5_p->md_buffer + (in_block & ~BLOCK_SIZE_MASK), - in_block & BLOCK_SIZE_MASK); - md5_p->md_buf_len = in_block & BLOCK_SIZE_MASK; - } - - buffer = (const char *)buffer + add; - len -= add; - } - - /* process available complete blocks right from the user buffer */ - if (len > MD5_BLOCK_SIZE) - { - process_block (md5_p, buffer, len & ~BLOCK_SIZE_MASK); - buffer = (const char *) buffer + (len & ~BLOCK_SIZE_MASK); - len &= BLOCK_SIZE_MASK; - } - - /* copy remaining bytes into the internal buffer */ - if (len > 0) - { - memcpy (md5_p->md_buffer, buffer, len); - md5_p->md_buf_len = len; - } -} - -/* - * md5_finish - * - * DESCRIPTION: - * - * Finish a progressing MD5 calculation and copy the resulting MD5 - * signature into the result buffer which should be 16 bytes - * (MD5_SIZE). After this call, the MD5 structure is invalid. - * - * RETURNS: - * - * None. - * - * ARGUMENTS: - * - * md5_p - Pointer to MD5 structure which we are finishing. - * - * signature - A 16 byte buffer that will contain the MD5 signature. - */ -void md5_finish(md5_t *md5_p, void *signature) -{ - md5_uint32 bytes, hold; - int pad; - - /* take yet unprocessed bytes into account */ - bytes = md5_p->md_buf_len; - - /* - * Count remaining bytes. Modified to do this to better avoid - * overflows in the lower word -- Gray 10/97. - */ - if (md5_p->md_total[0] > MAX_MD5_UINT32 - bytes) - { - md5_p->md_total[1]++; - md5_p->md_total[0] -= (MAX_MD5_UINT32 + 1 - bytes); - } - else - { - md5_p->md_total[0] += bytes; - } - - /* - * Pad the buffer to the next MD5_BLOCK-byte boundary. (RFC 1321, - * 3.1: Step 1). We need enough room for two size words and the - * bytes left in the buffer. For some reason even if we are equal - * to the block-size, we add an addition block of pad bytes. - */ - pad = MD5_BLOCK_SIZE - (sizeof(md5_uint32) * 2) - bytes; - if (pad <= 0) - { - pad += MD5_BLOCK_SIZE; - } - - /* - * Modified from a fixed array to this assignment and memset to be - * more flexible with block-sizes -- Gray 10/97. - */ - if (pad > 0) - { - /* some sort of padding start byte */ - md5_p->md_buffer[bytes] = (unsigned char)0x80; - if (pad > 1) - { - memset (md5_p->md_buffer + bytes + 1, 0, pad - 1); - } - bytes += pad; - } - - /* - * Put the 64-bit file length in _bits_ (i.e. *8) at the end of the - * buffer. - */ - hold = SWAP((md5_p->md_total[0] & 0x1FFFFFFF) << 3); - memcpy(md5_p->md_buffer + bytes, &hold, sizeof(md5_uint32)); - bytes += sizeof(md5_uint32); - - /* shift the high word over by 3 and add in the top 3 bits from the low */ - hold = SWAP((md5_p->md_total[1] << 3) | - ((md5_p->md_total[0] & 0xE0000000) >> 29)); - memcpy(md5_p->md_buffer + bytes, &hold, sizeof(md5_uint32)); - bytes += sizeof(md5_uint32); - - /* process last bytes, the padding chars, and size words */ - process_block(md5_p, md5_p->md_buffer, bytes); - md5_get_result(md5_p, signature); -} - -/* - * md5_buffer - * - * DESCRIPTION: - * - * This function is used to calculate a MD5 signature for a buffer of - * bytes. If you only have part of a buffer that you want to process - * then md5_init, md5_process, and md5_finish should be used. - * - * RETURNS: - * - * None. - * - * ARGUMENTS: - * - * buffer - A buffer of bytes whose MD5 signature we are calculating. - * - * buf_len - The length of the buffer. - * - * signature - A 16 byte buffer that will contain the MD5 signature. - */ -void md5_buffer(const char *buffer, const unsigned int buf_len, - void *signature) -{ - md5_t md5; - - /* initialize the computation context */ - md5_init(&md5); - - /* process whole buffer but last buf_len % MD5_BLOCK bytes */ - md5_process(&md5, buffer, buf_len); - - /* put result in desired memory area */ - md5_finish(&md5, signature); -} - -/* - * md5_sig_to_string - * - * DESCRIPTION: - * - * Convert a MD5 signature in a 16 byte buffer into a hexadecimal string - * representation. - * - * RETURNS: - * - * None. - * - * ARGUMENTS: - * - * signature - a 16 byte buffer that contains the MD5 signature. - * - * str - a string of charactes which should be at least 33 bytes long (2 - * characters per MD5 byte and 1 for the \0). - * - * str_len - the length of the string. - */ -void md5_sig_to_string(void *signature, char *str, const int str_len) -{ - unsigned char *sig_p; - char *str_p, *max_p; - unsigned int high, low; - - str_p = str; - max_p = str + str_len; - - for (sig_p = (unsigned char *)signature; - sig_p < (unsigned char *)signature + MD5_SIZE; - sig_p++) - { - high = *sig_p / 16; - low = *sig_p % 16; - /* account for 2 chars */ - if (str_p + 1 >= max_p) - { - break; - } - *str_p++ = HEX_STRING[high]; - *str_p++ = HEX_STRING[low]; - } - /* account for 2 chars */ - if (str_p < max_p) - { - *str_p++ = '\0'; - } -} - -/* - * md5_sig_from_string - * - * DESCRIPTION: - * - * Convert a MD5 signature from a hexadecimal string representation into - * a 16 byte buffer. - * - * RETURNS: - * - * None. - * - * ARGUMENTS: - * - * signature - A 16 byte buffer that will contain the MD5 signature. - * - * str - A string of charactes which _must_ be at least 32 bytes long (2 - * characters per MD5 byte). - */ -void md5_sig_from_string(void *signature, const char *str) -{ - unsigned char *sig_p; - const char *str_p; - char *hex; - unsigned int high, low, val; - - hex = HEX_STRING; - sig_p = signature; - - for (str_p = str; str_p < str + MD5_SIZE * 2; str_p += 2) - { - high = strchr(hex, *str_p) - hex; - low = strchr(hex, *(str_p + 1)) - hex; - val = high * 16 + low; - *sig_p++ = val; - } -} |