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| -rw-r--r-- | coreutils/md5sum.c | 1102 |
1 files changed, 0 insertions, 1102 deletions
diff --git a/coreutils/md5sum.c b/coreutils/md5sum.c deleted file mode 100644 index c0294f4cd..000000000 --- a/coreutils/md5sum.c +++ /dev/null @@ -1,1102 +0,0 @@ -/* md5sum.c - Compute MD5 checksum of files or strings according to the - * definition of MD5 in RFC 1321 from April 1992. - * Copyright (C) 1995-1999 Free Software Foundation, Inc. - * - * 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> */ -/* Hacked to work with BusyBox by Alfred M. Szmidt <ams@trillian.itslinux.org> */ - -/* - * June 29, 2001 Manuel Novoa III - * - * Added MD5SUM_SIZE_VS_SPEED configuration option. - * - * Current valid values, with data from my system for comparison, are: - * (using uClibc and running on linux-2.4.4.tar.bz2) - * user times (sec) text size (386) - * 0 (fastest) 1.1 6144 - * 1 1.4 5392 - * 2 3.0 5088 - * 3 (smallest) 5.1 4912 - */ - -#define MD5SUM_SIZE_VS_SPEED 2 - -/**********************************************************************/ - -#include <stdio.h> -#include <errno.h> -#include <ctype.h> -#include <getopt.h> -#include <stdlib.h> -#include <string.h> -#include <endian.h> -#include <sys/types.h> -#if defined HAVE_LIMITS_H -# include <limits.h> -#endif -#include "busybox.h" - -/* For some silly reason, this file uses backwards TRUE and FALSE conventions */ -#undef TRUE -#undef FALSE -#define FALSE ((int) 1) -#define TRUE ((int) 0) - -//---------------------------------------------------------------------------- -//--------md5.c -//---------------------------------------------------------------------------- - -/* md5.c - Functions to compute MD5 message digest of files or memory blocks - * according to the definition of MD5 in RFC 1321 from April 1992. - */ - -/* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. */ - -//---------------------------------------------------------------------------- -//--------md5.h -//---------------------------------------------------------------------------- - -/* md5.h - Declaration of functions and data types used for MD5 sum - computing library functions. */ - -typedef u_int32_t md5_uint32; - -/* Structure to save state of computation between the single steps. */ -struct md5_ctx { - md5_uint32 A; - md5_uint32 B; - md5_uint32 C; - md5_uint32 D; - - md5_uint32 total[2]; - md5_uint32 buflen; - char buffer[128]; -}; - -/* - * The following three functions are build up the low level used in - * the functions `md5_stream' and `md5_buffer'. - */ - -/* Initialize structure containing state of computation. - (RFC 1321, 3.3: Step 3) */ -static void md5_init_ctx __P((struct md5_ctx * ctx)); - -/* Starting with the result of former calls of this function (or the - initialization function update the context for the next LEN bytes - starting at BUFFER. - It is necessary that LEN is a multiple of 64!!! */ -static void md5_process_block __P((const void *buffer, size_t len, - struct md5_ctx * ctx)); - -/* Starting with the result of former calls of this function (or the - initialization function update the context for the next LEN bytes - starting at BUFFER. - It is NOT required that LEN is a multiple of 64. */ -static void md5_process_bytes __P((const void *buffer, size_t len, - struct md5_ctx * ctx)); - -/* Process the remaining bytes in the buffer and put result from CTX - in first 16 bytes following RESBUF. The result is always in little - endian byte order, so that a byte-wise output yields to the wanted - ASCII representation of the message digest. - - IMPORTANT: On some systems it is required that RESBUF is correctly - aligned for a 32 bits value. */ -static void *md5_finish_ctx __P((struct md5_ctx * ctx, void *resbuf)); - - - - -/* Compute MD5 message digest for bytes read from STREAM. The - resulting message digest number will be written into the 16 bytes - beginning at RESBLOCK. */ -static int md5_stream __P((FILE * stream, void *resblock)); - -/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The - result is always in little endian byte order, so that a byte-wise - output yields to the wanted ASCII representation of the message - digest. */ -static void *md5_buffer __P((const char *buffer, size_t len, void *resblock)); - -//---------------------------------------------------------------------------- -//--------end of md5.h -//---------------------------------------------------------------------------- - -/* Handle endian-ness */ -#if __BYTE_ORDER == __LITTLE_ENDIAN -#define SWAP(n) (n) -#else -#define SWAP(n) ((n << 24) | ((n&65280)<<8) | ((n&16711680)>>8) | (n>>24)) -#endif - - - -#if MD5SUM_SIZE_VS_SPEED == 0 -/* This array contains the bytes used to pad the buffer to the next - 64-byte boundary. (RFC 1321, 3.1: Step 1) */ -static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ }; -#endif - -/* Initialize structure containing state of computation. - (RFC 1321, 3.3: Step 3) */ -void md5_init_ctx(struct md5_ctx *ctx) -{ - ctx->A = 0x67452301; - ctx->B = 0xefcdab89; - ctx->C = 0x98badcfe; - ctx->D = 0x10325476; - - ctx->total[0] = ctx->total[1] = 0; - ctx->buflen = 0; -} - -/* Process the remaining bytes in the internal buffer and the usual - prolog according to the standard and write the result to RESBUF. - - IMPORTANT: On some systems it is required that RESBUF is correctly - aligned for a 32 bits value. */ -static void *md5_finish_ctx(struct md5_ctx *ctx, void *resbuf) -{ - /* Take yet unprocessed bytes into account. */ - md5_uint32 bytes = ctx->buflen; - size_t pad; - - /* Now count remaining bytes. */ - ctx->total[0] += bytes; - if (ctx->total[0] < bytes) - ++ctx->total[1]; - - pad = bytes >= 56 ? 64 + 56 - bytes : 56 - bytes; -#if MD5SUM_SIZE_VS_SPEED > 0 - memset(&ctx->buffer[bytes], 0, pad); - ctx->buffer[bytes] = 0x80; -#else - memcpy(&ctx->buffer[bytes], fillbuf, pad); -#endif - - /* Put the 64-bit file length in *bits* at the end of the buffer. */ - *(md5_uint32 *) & ctx->buffer[bytes + pad] = SWAP(ctx->total[0] << 3); - *(md5_uint32 *) & ctx->buffer[bytes + pad + 4] = - SWAP(((ctx->total[1] << 3) | (ctx->total[0] >> 29))); - - /* Process last bytes. */ - md5_process_block(ctx->buffer, bytes + pad + 8, ctx); - -/* Put result from CTX in first 16 bytes following RESBUF. The result is - always in little endian byte order, so that a byte-wise output yields - to the wanted ASCII representation of the message digest. - - IMPORTANT: On some systems it is required that RESBUF is correctly - aligned for a 32 bits value. */ - ((md5_uint32 *) resbuf)[0] = SWAP(ctx->A); - ((md5_uint32 *) resbuf)[1] = SWAP(ctx->B); - ((md5_uint32 *) resbuf)[2] = SWAP(ctx->C); - ((md5_uint32 *) resbuf)[3] = SWAP(ctx->D); - - return resbuf; -} - -/* Compute MD5 message digest for bytes read from STREAM. The - resulting message digest number will be written into the 16 bytes - beginning at RESBLOCK. */ -static int md5_stream(FILE * stream, void *resblock) -{ - /* Important: BLOCKSIZE must be a multiple of 64. */ - static const int BLOCKSIZE = 4096; - struct md5_ctx ctx; - char buffer[BLOCKSIZE + 72]; - size_t sum; - - /* Initialize the computation context. */ - md5_init_ctx(&ctx); - - /* Iterate over full file contents. */ - while (1) { - /* We read the file in blocks of BLOCKSIZE bytes. One call of the - computation function processes the whole buffer so that with the - next round of the loop another block can be read. */ - size_t n; - - sum = 0; - - /* Read block. Take care for partial reads. */ - do { - n = fread(buffer + sum, 1, BLOCKSIZE - sum, stream); - - sum += n; - } - while (sum < BLOCKSIZE && n != 0); - if (n == 0 && ferror(stream)) - return 1; - - /* If end of file is reached, end the loop. */ - if (n == 0) - break; - - /* Process buffer with BLOCKSIZE bytes. Note that - BLOCKSIZE % 64 == 0 - */ - md5_process_block(buffer, BLOCKSIZE, &ctx); - } - - /* Add the last bytes if necessary. */ - if (sum > 0) - md5_process_bytes(buffer, sum, &ctx); - - /* Construct result in desired memory. */ - md5_finish_ctx(&ctx, resblock); - return 0; -} - -/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The - result is always in little endian byte order, so that a byte-wise - output yields to the wanted ASCII representation of the message - digest. */ -static void *md5_buffer(const char *buffer, size_t len, void *resblock) -{ - struct md5_ctx ctx; - - /* Initialize the computation context. */ - md5_init_ctx(&ctx); - - /* Process whole buffer but last len % 64 bytes. */ - md5_process_bytes(buffer, len, &ctx); - - /* Put result in desired memory area. */ - return md5_finish_ctx(&ctx, resblock); -} - -static void md5_process_bytes(const void *buffer, size_t len, - struct md5_ctx *ctx) -{ - /* When we already have some bits in our internal buffer concatenate - both inputs first. */ - if (ctx->buflen != 0) { - size_t left_over = ctx->buflen; - size_t add = 128 - left_over > len ? len : 128 - left_over; - - memcpy(&ctx->buffer[left_over], buffer, add); - ctx->buflen += add; - - if (left_over + add > 64) { - md5_process_block(ctx->buffer, (left_over + add) & ~63, ctx); - /* The regions in the following copy operation cannot overlap. */ - memcpy(ctx->buffer, &ctx->buffer[(left_over + add) & ~63], - (left_over + add) & 63); - ctx->buflen = (left_over + add) & 63; - } - - buffer = (const char *) buffer + add; - len -= add; - } - - /* Process available complete blocks. */ - if (len > 64) { - md5_process_block(buffer, len & ~63, ctx); - buffer = (const char *) buffer + (len & ~63); - len &= 63; - } - - /* Move remaining bytes in internal buffer. */ - if (len > 0) { - memcpy(ctx->buffer, buffer, len); - ctx->buflen = len; - } -} - -/* 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)) - -/* Process LEN bytes of BUFFER, accumulating context into CTX. - It is assumed that LEN % 64 == 0. */ -static void md5_process_block(const void *buffer, size_t len, - struct md5_ctx *ctx) -{ - md5_uint32 correct_words[16]; - const md5_uint32 *words = buffer; - size_t nwords = len / sizeof(md5_uint32); - const md5_uint32 *endp = words + nwords; - -#if MD5SUM_SIZE_VS_SPEED > 0 - static const md5_uint32 C_array[] = { - /* round 1 */ - 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, - 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, - 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, - 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, - /* round 2 */ - 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, - 0xd62f105d, 0x2441453, 0xd8a1e681, 0xe7d3fbc8, - 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, - 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a, - /* round 3 */ - 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, - 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, - 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05, - 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665, - /* round 4 */ - 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, - 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, - 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, - 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391 - }; - - static const char P_array[] = { -#if MD5SUM_SIZE_VS_SPEED > 1 - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* 1 */ -#endif - 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, /* 2 */ - 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, /* 3 */ - 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9 /* 4 */ - }; - -#if MD5SUM_SIZE_VS_SPEED > 1 - static const char S_array[] = { - 7, 12, 17, 22, - 5, 9, 14, 20, - 4, 11, 16, 23, - 6, 10, 15, 21 - }; -#endif -#endif - - md5_uint32 A = ctx->A; - md5_uint32 B = ctx->B; - md5_uint32 C = ctx->C; - md5_uint32 D = ctx->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. Do a double word increment. */ - ctx->total[0] += len; - if (ctx->total[0] < len) - ++ctx->total[1]; - - /* Process all bytes in the buffer with 64 bytes in each round of - the loop. */ - while (words < endp) { - md5_uint32 *cwp = correct_words; - md5_uint32 A_save = A; - md5_uint32 B_save = B; - md5_uint32 C_save = C; - md5_uint32 D_save = D; - -#if MD5SUM_SIZE_VS_SPEED > 1 -#define CYCLIC(w, s) (w = (w << s) | (w >> (32 - s))) - - const md5_uint32 *pc; - const char *pp; - const char *ps; - int i; - md5_uint32 temp; - - for (i = 0; i < 16; i++) { - cwp[i] = SWAP(words[i]); - } - words += 16; - -#if MD5SUM_SIZE_VS_SPEED > 2 - pc = C_array; - pp = P_array; - ps = S_array - 4; - - for (i = 0; i < 64; i++) { - if ((i & 0x0f) == 0) - ps += 4; - temp = A; - switch (i >> 4) { - case 0: - temp += FF(B, C, D); - break; - case 1: - temp += FG(B, C, D); - break; - case 2: - temp += FH(B, C, D); - break; - case 3: - temp += FI(B, C, D); - } - temp += cwp[(int) (*pp++)] + *pc++; - CYCLIC(temp, ps[i & 3]); - temp += B; - A = D; - D = C; - C = B; - B = temp; - } -#else - pc = C_array; - pp = P_array; - ps = S_array; - - for (i = 0; i < 16; i++) { - temp = A + FF(B, C, D) + cwp[(int) (*pp++)] + *pc++; - CYCLIC(temp, ps[i & 3]); - temp += B; - A = D; - D = C; - C = B; - B = temp; - } - - ps += 4; - for (i = 0; i < 16; i++) { - temp = A + FG(B, C, D) + cwp[(int) (*pp++)] + *pc++; - CYCLIC(temp, ps[i & 3]); - temp += B; - A = D; - D = C; - C = B; - B = temp; - } - ps += 4; - for (i = 0; i < 16; i++) { - temp = A + FH(B, C, D) + cwp[(int) (*pp++)] + *pc++; - CYCLIC(temp, ps[i & 3]); - temp += B; - A = D; - D = C; - C = B; - B = temp; - } - ps += 4; - for (i = 0; i < 16; i++) { - temp = A + FI(B, C, D) + cwp[(int) (*pp++)] + *pc++; - CYCLIC(temp, ps[i & 3]); - temp += B; - A = D; - D = C; - C = B; - B = temp; - } - -#endif -#else - /* 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. */ - -#define OP(a, b, c, d, s, T) \ - do \ - { \ - a += FF (b, c, d) + (*cwp++ = SWAP (*words)) + T; \ - ++words; \ - CYCLIC (a, s); \ - a += b; \ - } \ - while (0) - - /* It is unfortunate that C does not provide an operator for - cyclic rotation. Hope the C compiler is smart enough. */ - /* gcc 2.95.4 seems to be --aaronl */ -#define CYCLIC(w, s) (w = (w << s) | (w >> (32 - s))) - - /* 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..64 - */ - -#if MD5SUM_SIZE_VS_SPEED == 1 - const md5_uint32 *pc; - const char *pp; - int i; -#endif - - /* Round 1. */ -#if MD5SUM_SIZE_VS_SPEED == 1 - pc = C_array; - for (i = 0; i < 4; i++) { - OP(A, B, C, D, 7, *pc++); - OP(D, A, B, C, 12, *pc++); - OP(C, D, A, B, 17, *pc++); - OP(B, C, D, A, 22, *pc++); - } -#else - 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); -#endif - - /* For the 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. */ -#undef OP -#define OP(f, a, b, c, d, k, s, T) \ - do \ - { \ - a += f (b, c, d) + correct_words[k] + T; \ - CYCLIC (a, s); \ - a += b; \ - } \ - while (0) - - /* Round 2. */ -#if MD5SUM_SIZE_VS_SPEED == 1 - pp = P_array; - for (i = 0; i < 4; i++) { - OP(FG, A, B, C, D, (int) (*pp++), 5, *pc++); - OP(FG, D, A, B, C, (int) (*pp++), 9, *pc++); - OP(FG, C, D, A, B, (int) (*pp++), 14, *pc++); - OP(FG, B, C, D, A, (int) (*pp++), 20, *pc++); - } -#else - 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); -#endif - - /* Round 3. */ -#if MD5SUM_SIZE_VS_SPEED == 1 - for (i = 0; i < 4; i++) { - OP(FH, A, B, C, D, (int) (*pp++), 4, *pc++); - OP(FH, D, A, B, C, (int) (*pp++), 11, *pc++); - OP(FH, C, D, A, B, (int) (*pp++), 16, *pc++); - OP(FH, B, C, D, A, (int) (*pp++), 23, *pc++); - } -#else - 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); -#endif - - /* Round 4. */ -#if MD5SUM_SIZE_VS_SPEED == 1 - for (i = 0; i < 4; i++) { - OP(FI, A, B, C, D, (int) (*pp++), 6, *pc++); - OP(FI, D, A, B, C, (int) (*pp++), 10, *pc++); - OP(FI, C, D, A, B, (int) (*pp++), 15, *pc++); - OP(FI, B, C, D, A, (int) (*pp++), 21, *pc++); - } -#else - 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); -#endif -#endif - - /* 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. */ - ctx->A = A; - ctx->B = B; - ctx->C = C; - ctx->D = D; -} - -//---------------------------------------------------------------------------- -//--------end of md5.c -//---------------------------------------------------------------------------- - -#define ISWHITE(c) ((c) == ' ' || (c) == '\t') -#define ISXDIGIT(c) (isxdigit (c)) - -/* The minimum length of a valid digest line in a file produced - by `md5sum FILE' and read by `md5sum -c'. This length does - not include any newline character at the end of a line. */ -static const int MIN_DIGEST_LINE_LENGTH = 35; /* 32 - message digest length - 2 - blank and binary indicator - 1 - minimum filename length */ - -static int have_read_stdin; /* Nonzero if any of the files read were - the standard input. */ - -static int status_only = 0; /* With -c, don't generate any output. - The exit code indicates success or failure */ -static int warn = 0; /* With -w, print a message to standard error warning - about each improperly formatted MD5 checksum line */ - -static int split_3(char *s, size_t s_len, unsigned char **u, char **w) -{ - size_t i = 0; - int escaped_filename = 0; - - while (ISWHITE(s[i])) - ++i; - - /* The line must have at least 35 (36 if the first is a backslash) - more characters to contain correct message digest information. - Ignore this line if it is too short. */ - if (!(s_len - i >= MIN_DIGEST_LINE_LENGTH - || (s[i] == '\\' && s_len - i >= 1 + MIN_DIGEST_LINE_LENGTH))) - return FALSE; - - if (s[i] == '\\') { - ++i; - escaped_filename = 1; - } - *u = (unsigned char *) &s[i]; - - /* The first field has to be the 32-character hexadecimal - representation of the message digest. If it is not followed - immediately by a white space it's an error. */ - i += 32; - if (!ISWHITE(s[i])) - return FALSE; - - s[i++] = '\0'; - - if (s[i] != ' ' && s[i] != '*') - return FALSE; - - /* All characters between the type indicator and end of line are - significant -- that includes leading and trailing white space. */ - *w = &s[++i]; - - if (escaped_filename) { - /* Translate each `\n' string in the file name to a NEWLINE, - and each `\\' string to a backslash. */ - - char *dst = &s[i]; - - while (i < s_len) { - switch (s[i]) { - case '\\': - if (i == s_len - 1) { - /* A valid line does not end with a backslash. */ - return FALSE; - } - ++i; - switch (s[i++]) { - case 'n': - *dst++ = '\n'; - break; - case '\\': - *dst++ = '\\'; - break; - default: - /* Only `\' or `n' may follow a backslash. */ - return FALSE; - } - break; - - case '\0': - /* The file name may not contain a NUL. */ - return FALSE; - break; - - default: - *dst++ = s[i++]; - break; - } - } - *dst = '\0'; - } - return TRUE; -} - -static inline int hex_digits(unsigned char const *s) -{ - while (*s) { - if (!ISXDIGIT(*s)) - return TRUE; - ++s; - } - return FALSE; -} - -/* An interface to md5_stream. Operate on FILENAME (it may be "-") and - put the result in *MD5_RESULT. Return non-zero upon failure, zero - to indicate success. */ -static int md5_file(const char *filename, unsigned char *md5_result) -{ - FILE *fp; - - if (filename[0] == '-' && filename[1] == '\0') { - have_read_stdin = 1; - fp = stdin; - } else { - fp = bb_wfopen(filename, "r"); - if (fp == NULL) - return FALSE; - } - - if (md5_stream(fp, md5_result)) { - bb_perror_msg("%s", filename); - - if (fp != stdin) - fclose(fp); - return FALSE; - } - - if (fp != stdin && fclose(fp) == EOF) { - bb_perror_msg("%s", filename); - return FALSE; - } - - return TRUE; -} - -static int md5_check(const char *checkfile_name) -{ - FILE *checkfile_stream; - int n_properly_formated_lines = 0; - int n_mismatched_checksums = 0; - int n_open_or_read_failures = 0; - unsigned char md5buffer[16]; - size_t line_number; - char line[BUFSIZ]; - - if (checkfile_name[0] == '-' && checkfile_name[1] == '\0') { - have_read_stdin = 1; - checkfile_stream = stdin; - } else { - checkfile_stream = bb_wfopen(checkfile_name, "r"); - if (checkfile_stream == NULL) - return FALSE; - } - - line_number = 0; - - do { - char *filename; - unsigned char *md5num; - int line_length; - - ++line_number; - - fgets(line, BUFSIZ - 1, checkfile_stream); - line_length = strlen(line); - - if (line_length <= 0 || line == NULL) - break; - - /* Ignore comment lines, which begin with a '#' character. */ - if (line[0] == '#') - continue; - - /* Remove any trailing newline. */ - if (line[line_length - 1] == '\n') - line[--line_length] = '\0'; - - if (split_3(line, line_length, &md5num, &filename) - || !hex_digits(md5num)) { - if (warn) { - bb_error_msg - ("%s: %lu: improperly formatted MD5 checksum line", - checkfile_name, (unsigned long) line_number); - } - } else { - static const char bin2hex[] = { - '0', '1', '2', '3', - '4', '5', '6', '7', - '8', '9', 'a', 'b', - 'c', 'd', 'e', 'f' - }; - - ++n_properly_formated_lines; - - if (md5_file(filename, md5buffer)) { - ++n_open_or_read_failures; - if (!status_only) { - printf("%s: FAILED open or read\n", filename); - fflush(stdout); - } - } else { - size_t cnt; - - /* Compare generated binary number with text representation - in check file. Ignore case of hex digits. */ - for (cnt = 0; cnt < 16; ++cnt) { - if (tolower(md5num[2 * cnt]) - != bin2hex[md5buffer[cnt] >> 4] - || (tolower(md5num[2 * cnt + 1]) - != (bin2hex[md5buffer[cnt] & 0xf]))) - break; - } - if (cnt != 16) - ++n_mismatched_checksums; - - if (!status_only) { - printf("%s: %s\n", filename, - (cnt != 16 ? "FAILED" : "OK")); - fflush(stdout); - } - } - } - } - - while (!feof(checkfile_stream) && !ferror(checkfile_stream)); - - if (ferror(checkfile_stream)) { - bb_error_msg("%s: read error", checkfile_name); - return FALSE; - } - - if (checkfile_stream != stdin && fclose(checkfile_stream) == EOF) { - bb_perror_msg("md5sum: %s", checkfile_name); - return FALSE; - } - - if (n_properly_formated_lines == 0) { - /* Warn if no tests are found. */ - bb_error_msg("%s: no properly formatted MD5 checksum lines found", - checkfile_name); - return FALSE; - } else { - if (!status_only) { - int n_computed_checkums = (n_properly_formated_lines - - n_open_or_read_failures); - - if (n_open_or_read_failures > 0) { - bb_error_msg - ("WARNING: %d of %d listed files could not be read", - n_open_or_read_failures, n_properly_formated_lines); - return FALSE; - } - - if (n_mismatched_checksums > 0) { - bb_error_msg - ("WARNING: %d of %d computed checksums did NOT match", - n_mismatched_checksums, n_computed_checkums); - return FALSE; - } - } - } - - return ((n_properly_formated_lines > 0 && n_mismatched_checksums == 0 - && n_open_or_read_failures == 0) ? 0 : 1); -} - -int md5sum_main(int argc, char **argv) -{ - unsigned char md5buffer[16]; - int do_check = 0; - int opt; - char **string = NULL; - size_t n_strings = 0; - size_t err = 0; - char file_type_specified = 0; - char binary = 0; - - while ((opt = getopt(argc, argv, "g:bcstw")) != -1) { - switch (opt) { - case 'g':{ /* read a string */ - if (string == NULL) - string = (char **) xmalloc((argc - 1) * sizeof(char *)); - - string[n_strings++] = optarg; - break; - } - - case 'b': /* read files in binary mode */ - file_type_specified = 1; - binary = 1; - break; - - case 'c': /* check MD5 sums against given list */ - do_check = 1; - break; - - case 's': /* don't output anything, status code shows success */ - status_only = 1; - warn = 0; - break; - - case 't': /* read files in text mode (default) */ - file_type_specified = 1; - binary = 0; - break; - - case 'w': /* warn about improperly formated MD5 checksum lines */ - status_only = 0; - warn = 1; - break; - - default: - bb_show_usage(); - } - } - - if (file_type_specified && do_check) { - bb_error_msg_and_die - ("the -b and -t options are meaningless when verifying checksums"); - } - - if (n_strings > 0 && do_check) { - bb_error_msg_and_die("the -g and -c options are mutually exclusive"); - } - - if (status_only && !do_check) { - bb_error_msg_and_die - ("the -s option is meaningful only when verifying checksums"); - } - - if (warn && !do_check) { - bb_error_msg_and_die - ("the -w option is meaningful only when verifying checksums"); - } - - if (n_strings > 0) { - size_t i; - - if (optind < argc) { - bb_error_msg_and_die("no files may be specified when using -g"); - } - for (i = 0; i < n_strings; ++i) { - size_t cnt; - - md5_buffer(string[i], strlen(string[i]), md5buffer); - - for (cnt = 0; cnt < 16; ++cnt) - printf("%02x", md5buffer[cnt]); - - printf(" \"%s\"\n", string[i]); - } - } else if (do_check) { - if (optind + 1 < argc) { - bb_error_msg("only one argument may be specified when using -c"); - } - - err = md5_check((optind == argc) ? "-" : argv[optind]); - } else { - if (optind == argc) - argv[argc++] = "-"; - - for (; optind < argc; ++optind) { - int fail; - char *file = argv[optind]; - - fail = md5_file(file, md5buffer); - err |= fail; - if (!fail && file[0] == '-' && file[1] == '\0') { - size_t i; - - for (i = 0; i < 16; ++i) - printf("%02x", md5buffer[i]); - putchar('\n'); - } else if (!fail) { - size_t i; - - /* Output a leading backslash if the file name contains - a newline or backslash. */ - if (strchr(file, '\n') || strchr(file, '\\')) - putchar('\\'); - - for (i = 0; i < 16; ++i) - printf("%02x", md5buffer[i]); - - putchar(' '); - if (binary) - putchar('*'); - else - putchar(' '); - - /* Translate each NEWLINE byte to the string, "\\n", - and each backslash to "\\\\". */ - for (i = 0; i < strlen(file); ++i) { - switch (file[i]) { - case '\n': - fputs("\\n", stdout); - break; - - case '\\': - fputs("\\\\", stdout); - break; - - default: - putchar(file[i]); - break; - } - } - putchar('\n'); - } - } - } - - if (fclose(stdout) == EOF) { - bb_error_msg_and_die("write error"); - } - - if (have_read_stdin && fclose(stdin) == EOF) { - bb_error_msg_and_die(bb_msg_standard_input); - } - - if (err == 0) - return EXIT_SUCCESS; - else - return EXIT_FAILURE; -} |