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Diffstat (limited to 'Build/source/texk/lcdf-typetools/lcdf-typetools-2.100/liblcdf/md5.c')
-rw-r--r-- | Build/source/texk/lcdf-typetools/lcdf-typetools-2.100/liblcdf/md5.c | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/Build/source/texk/lcdf-typetools/lcdf-typetools-2.100/liblcdf/md5.c b/Build/source/texk/lcdf-typetools/lcdf-typetools-2.100/liblcdf/md5.c new file mode 100644 index 00000000000..c8508865c20 --- /dev/null +++ b/Build/source/texk/lcdf-typetools/lcdf-typetools-2.100/liblcdf/md5.c @@ -0,0 +1,357 @@ +/* -*- mode: c; c-basic-offset: 8; related-file-name: "../include/lcdf/md5.h" -*- */ +/* md5.c - MD5 Message-Digest Algorithm + * Copyright (C) 1995, 1996, 1998, 1999 Free Software Foundation, Inc. + * + * according to the definition of MD5 in RFC 1321 from April 1992. + * NOTE: This is *not* the same file as the one from glibc. + * + * 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. */ +/* heavily modified for GnuPG by <werner.koch@guug.de> */ +/* modified again for Sylpheed by <wk@gnupg.org> 2001-02-11 */ +/* modified again for LCDF by Eddie Kohler <kohler@icir.org> */ + + +/* Test values: + * "" D4 1D 8C D9 8F 00 B2 04 E9 80 09 98 EC F8 42 7E + * "a" 0C C1 75 B9 C0 F1 B6 A8 31 C3 99 E2 69 77 26 61 + * "abc 90 01 50 98 3C D2 4F B0 D6 96 3F 7D 28 E1 7F 72 + * "message digest" F9 6B 69 7D 7C B7 93 8D 52 5A 2F 31 AA F1 61 D0 + */ + +#include <config.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <lcdf/inttypes.h> +#include <lcdf/md5.h> + +#ifdef __cplusplus +extern "C" { +#endif + + +/**************** + * Rotate a 32 bit integer by n bits + */ +#if defined(__GNUC__) && defined(__i386__) +static inline uint32_t +rol( uint32_t x, int n) +{ + __asm__("roll %%cl,%0" + :"=r" (x) + :"0" (x),"c" (n)); + return x; +} +#else +#define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) ) +#endif + + +void +md5_init(MD5_CONTEXT *ctx) +{ + ctx->A = 0x67452301; + ctx->B = 0xefcdab89; + ctx->C = 0x98badcfe; + ctx->D = 0x10325476; + + ctx->nblocks = 0; + ctx->count = 0; + ctx->finalized = 0; +} + +/* 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)) + + +/**************** + * transform n*64 bytes + */ +static void +transform(MD5_CONTEXT *ctx, const unsigned char *data) +{ + uint32_t correct_words[16]; + uint32_t A = ctx->A; + uint32_t B = ctx->B; + uint32_t C = ctx->C; + uint32_t D = ctx->D; + uint32_t *cwp = correct_words; + +#if WORDS_BIGENDIAN + { + int i; + unsigned char *p2, *p1; + + for (i = 0, p1 = data, p2 = (unsigned char*)correct_words; + i < 16; i++, p2 += 4) { + p2[3] = *p1++; + p2[2] = *p1++; + p2[1] = *p1++; + p2[0] = *p1++; + } + } +#elif WORDS_BIGENDIAN_SET + memcpy(correct_words, data, 64); +#else +# error "WORDS_BIGENDIAN has not been set!" +#endif + + +#define OP(a, b, c, d, s, T) \ + do { \ + a += FF (b, c, d) + (*cwp++) + T; \ + a = rol(a, s); \ + a += b; \ + } while (0) + + /* Before we start, one word about the strange constants. + They are defined in RFC 1321 as + + T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64 + */ + + /* Round 1. */ + OP (A, B, C, D, 7, 0xd76aa478); + OP (D, A, B, C, 12, 0xe8c7b756); + OP (C, D, A, B, 17, 0x242070db); + OP (B, C, D, A, 22, 0xc1bdceee); + OP (A, B, C, D, 7, 0xf57c0faf); + OP (D, A, B, C, 12, 0x4787c62a); + OP (C, D, A, B, 17, 0xa8304613); + OP (B, C, D, A, 22, 0xfd469501); + OP (A, B, C, D, 7, 0x698098d8); + OP (D, A, B, C, 12, 0x8b44f7af); + OP (C, D, A, B, 17, 0xffff5bb1); + OP (B, C, D, A, 22, 0x895cd7be); + OP (A, B, C, D, 7, 0x6b901122); + OP (D, A, B, C, 12, 0xfd987193); + OP (C, D, A, B, 17, 0xa679438e); + OP (B, C, D, A, 22, 0x49b40821); + +#undef OP +#define OP(f, a, b, c, d, k, s, T) \ + do { \ + a += f (b, c, d) + correct_words[k] + T; \ + a = rol(a, s); \ + a += b; \ + } while (0) + + /* Round 2. */ + OP (FG, A, B, C, D, 1, 5, 0xf61e2562); + OP (FG, D, A, B, C, 6, 9, 0xc040b340); + OP (FG, C, D, A, B, 11, 14, 0x265e5a51); + OP (FG, B, C, D, A, 0, 20, 0xe9b6c7aa); + OP (FG, A, B, C, D, 5, 5, 0xd62f105d); + OP (FG, D, A, B, C, 10, 9, 0x02441453); + OP (FG, C, D, A, B, 15, 14, 0xd8a1e681); + OP (FG, B, C, D, A, 4, 20, 0xe7d3fbc8); + OP (FG, A, B, C, D, 9, 5, 0x21e1cde6); + OP (FG, D, A, B, C, 14, 9, 0xc33707d6); + OP (FG, C, D, A, B, 3, 14, 0xf4d50d87); + OP (FG, B, C, D, A, 8, 20, 0x455a14ed); + OP (FG, A, B, C, D, 13, 5, 0xa9e3e905); + OP (FG, D, A, B, C, 2, 9, 0xfcefa3f8); + OP (FG, C, D, A, B, 7, 14, 0x676f02d9); + OP (FG, B, C, D, A, 12, 20, 0x8d2a4c8a); + + /* Round 3. */ + OP (FH, A, B, C, D, 5, 4, 0xfffa3942); + OP (FH, D, A, B, C, 8, 11, 0x8771f681); + OP (FH, C, D, A, B, 11, 16, 0x6d9d6122); + OP (FH, B, C, D, A, 14, 23, 0xfde5380c); + OP (FH, A, B, C, D, 1, 4, 0xa4beea44); + OP (FH, D, A, B, C, 4, 11, 0x4bdecfa9); + OP (FH, C, D, A, B, 7, 16, 0xf6bb4b60); + OP (FH, B, C, D, A, 10, 23, 0xbebfbc70); + OP (FH, A, B, C, D, 13, 4, 0x289b7ec6); + OP (FH, D, A, B, C, 0, 11, 0xeaa127fa); + OP (FH, C, D, A, B, 3, 16, 0xd4ef3085); + OP (FH, B, C, D, A, 6, 23, 0x04881d05); + OP (FH, A, B, C, D, 9, 4, 0xd9d4d039); + OP (FH, D, A, B, C, 12, 11, 0xe6db99e5); + OP (FH, C, D, A, B, 15, 16, 0x1fa27cf8); + OP (FH, B, C, D, A, 2, 23, 0xc4ac5665); + + /* Round 4. */ + OP (FI, A, B, C, D, 0, 6, 0xf4292244); + OP (FI, D, A, B, C, 7, 10, 0x432aff97); + OP (FI, C, D, A, B, 14, 15, 0xab9423a7); + OP (FI, B, C, D, A, 5, 21, 0xfc93a039); + OP (FI, A, B, C, D, 12, 6, 0x655b59c3); + OP (FI, D, A, B, C, 3, 10, 0x8f0ccc92); + OP (FI, C, D, A, B, 10, 15, 0xffeff47d); + OP (FI, B, C, D, A, 1, 21, 0x85845dd1); + OP (FI, A, B, C, D, 8, 6, 0x6fa87e4f); + OP (FI, D, A, B, C, 15, 10, 0xfe2ce6e0); + OP (FI, C, D, A, B, 6, 15, 0xa3014314); + OP (FI, B, C, D, A, 13, 21, 0x4e0811a1); + OP (FI, A, B, C, D, 4, 6, 0xf7537e82); + OP (FI, D, A, B, C, 11, 10, 0xbd3af235); + OP (FI, C, D, A, B, 2, 15, 0x2ad7d2bb); + OP (FI, B, C, D, A, 9, 21, 0xeb86d391); + + /* Put checksum in context given as argument. */ + ctx->A += A; + ctx->B += B; + ctx->C += C; + ctx->D += D; +} + + + +/* The routine updates the message-digest context to + * account for the presence of each of the characters inBuf[0..inLen-1] + * in the message whose digest is being computed. + */ +void +md5_update(MD5_CONTEXT *hd, const unsigned char *inbuf, size_t inlen) +{ + if (hd->count == 64) { /* flush the buffer */ + transform( hd, hd->buf ); + hd->count = 0; + hd->nblocks++; + } + if (!inbuf) + return; + if (hd->count) { + for (; inlen && hd->count < 64; inlen--) + hd->buf[hd->count++] = *inbuf++; + md5_update(hd, NULL, 0); + if (!inlen) + return; + } + + while (inlen >= 64) { + transform(hd, inbuf); + hd->count = 0; + hd->nblocks++; + inlen -= 64; + inbuf += 64; + } + + for (; inlen && hd->count < 64; inlen--) + hd->buf[hd->count++] = *inbuf++; +} + + + +/* The routine final terminates the message-digest computation and + * ends with the desired message digest in mdContext->digest[0...15]. + * The handle is prepared for a new MD5 cycle. + * Returns 16 bytes representing the digest. + */ + +static void +do_final(MD5_CONTEXT *hd) +{ + uint32_t t, msb, lsb; + unsigned char *p; + + md5_update(hd, NULL, 0); /* flush */ + + msb = 0; + t = hd->nblocks; + if ((lsb = t << 6) < t) /* multiply by 64 to make a byte count */ + msb++; + msb += t >> 26; + t = lsb; + if ((lsb = t + hd->count) < t) /* add the count */ + msb++; + t = lsb; + if ((lsb = t << 3) < t) /* multiply by 8 to make a bit count */ + msb++; + msb += t >> 29; + + if (hd->count < 56) { /* enough room */ + hd->buf[hd->count++] = 0x80; /* pad */ + while(hd->count < 56) + hd->buf[hd->count++] = 0; /* pad */ + } else { /* need one extra block */ + hd->buf[hd->count++] = 0x80; /* pad character */ + while (hd->count < 64) + hd->buf[hd->count++] = 0; + md5_update(hd, NULL, 0); /* flush */ + memset(hd->buf, 0, 56); /* fill next block with zeroes */ + } + + /* append the 64 bit count */ + hd->buf[56] = lsb ; + hd->buf[57] = lsb >> 8; + hd->buf[58] = lsb >> 16; + hd->buf[59] = lsb >> 24; + hd->buf[60] = msb ; + hd->buf[61] = msb >> 8; + hd->buf[62] = msb >> 16; + hd->buf[63] = msb >> 24; + transform(hd, hd->buf); + + p = hd->buf; +#if WORDS_BIGENDIAN +#define X(a) do { *p++ = hd->a ; *p++ = hd->a >> 8; \ + *p++ = hd->a >> 16; *p++ = hd->a >> 24; } while(0) +#elif WORDS_BIGENDIAN_SET + /*#define X(a) do { *(uint32_t*)p = hd->##a ; p += 4; } while(0)*/ + /* Unixware's cpp doesn't like the above construct so we do it his way: + * (reported by Allan Clark) */ +#define X(a) do { *(uint32_t*)p = (*hd).a ; p += 4; } while(0) +#else +# error "WORDS_BIGENDIAN has not been set!" +#endif + X(A); + X(B); + X(C); + X(D); +#undef X + hd->finalized = 1; +} + +void +md5_final(unsigned char *digest, MD5_CONTEXT *ctx) +{ + if (!ctx->finalized) + do_final(ctx); + memcpy(digest, ctx->buf, 16); +} + +void +md5_final_text(char *buf, MD5_CONTEXT *ctx) +{ + static const char *chars = "abcdefghijklmnopqrstuvwxyz234567"; + int bit; + if (!ctx->finalized) + do_final(ctx); + for (bit = 0; bit < 16*8; bit += 5) { + int first_char = bit / 8; + int val = ctx->buf[first_char] >> (bit % 8); + if (bit + 8 > (first_char + 1) * 8 && first_char < 15) + val += ctx->buf[first_char + 1] << (8 - (bit % 8)); + *buf++ = chars[val & 0x1F]; + } + *buf++ = 0; +} + + +#ifdef __cplusplus +} +#endif |