1 /* md5sum.c - Compute MD5 checksum of files or strings according to the
2 * definition of MD5 in RFC 1321 from April 1992.
3 * Copyright (C) 1995-1999 Free Software Foundation, Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software Foundation,
17 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 /* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu> */
21 /* Hacked to work with BusyBox by Alfred M. Szmidt <ams@trillian.itslinux.org> */
29 /* It turns out that libc5 doesn't have this in its headers
30 * even though it is actually in the lib. Force it to work */
31 #if ! defined __GLIBC__ && ! defined __UCLIBC__
32 #define getline __getline
33 extern _IO_ssize_t getline __P ((char **, size_t *, FILE *));
36 //----------------------------------------------------------------------------
38 //----------------------------------------------------------------------------
40 /* md5.c - Functions to compute MD5 message digest of files or memory blocks
41 * according to the definition of MD5 in RFC 1321 from April 1992.
42 * Copyright (C) 1995, 1996 Free Software Foundation, Inc.
44 * NOTE: The canonical source of this file is maintained with the GNU C
45 * Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu.
47 * This program is free software; you can redistribute it and/or modify it
48 * under the terms of the GNU General Public License as published by the
49 * Free Software Foundation; either version 2, or (at your option) any
52 * This program is distributed in the hope that it will be useful,
53 * but WITHOUT ANY WARRANTY; without even the implied warranty of
54 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
55 * GNU General Public License for more details.
57 * You should have received a copy of the GNU General Public License
58 * along with this program; if not, write to the Free Software Foundation,
59 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
62 /* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. */
64 #include <sys/types.h>
70 //----------------------------------------------------------------------------
72 //----------------------------------------------------------------------------
74 /* md5.h - Declaration of functions and data types used for MD5 sum
75 computing library functions.
76 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
77 NOTE: The canonical source of this file is maintained with the GNU C
78 Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu.
80 This program is free software; you can redistribute it and/or modify it
81 under the terms of the GNU General Public License as published by the
82 Free Software Foundation; either version 2, or (at your option) any
85 This program is distributed in the hope that it will be useful,
86 but WITHOUT ANY WARRANTY; without even the implied warranty of
87 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
88 GNU General Public License for more details.
90 You should have received a copy of the GNU General Public License
91 along with this program; if not, write to the Free Software Foundation,
92 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
99 #if defined HAVE_LIMITS_H || _LIBC
103 /* The following contortions are an attempt to use the C preprocessor
104 to determine an unsigned integral type that is 32 bits wide. An
105 alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
106 doing that would require that the configure script compile and *run*
107 the resulting executable. Locally running cross-compiled executables
108 is usually not possible. */
111 # include <sys/types.h>
112 typedef u_int32_t md5_uint32;
114 # if defined __STDC__ && __STDC__
115 # define UINT_MAX_32_BITS 4294967295U
117 # define UINT_MAX_32_BITS 0xFFFFFFFF
120 /* If UINT_MAX isn't defined, assume it's a 32-bit type.
121 This should be valid for all systems GNU cares about because
122 that doesn't include 16-bit systems, and only modern systems
123 (that certainly have <limits.h>) have 64+-bit integral types. */
126 # define UINT_MAX UINT_MAX_32_BITS
129 # if UINT_MAX == UINT_MAX_32_BITS
130 typedef unsigned int md5_uint32;
132 # if USHRT_MAX == UINT_MAX_32_BITS
133 typedef unsigned short md5_uint32;
135 # if ULONG_MAX == UINT_MAX_32_BITS
136 typedef unsigned long md5_uint32;
138 /* The following line is intended to evoke an error.
139 Using #error is not portable enough. */
140 "Cannot determine unsigned 32-bit data type."
147 #if defined (__STDC__) && __STDC__
153 /* Structure to save state of computation between the single steps. */
167 * The following three functions are build up the low level used in
168 * the functions `md5_stream' and `md5_buffer'.
171 /* Initialize structure containing state of computation.
172 (RFC 1321, 3.3: Step 3) */
173 extern void md5_init_ctx __P ((struct md5_ctx *ctx));
175 /* Starting with the result of former calls of this function (or the
176 initialization function update the context for the next LEN bytes
178 It is necessary that LEN is a multiple of 64!!! */
179 extern void md5_process_block __P ((const void *buffer, size_t len,
180 struct md5_ctx *ctx));
182 /* Starting with the result of former calls of this function (or the
183 initialization function update the context for the next LEN bytes
185 It is NOT required that LEN is a multiple of 64. */
186 extern void md5_process_bytes __P ((const void *buffer, size_t len,
187 struct md5_ctx *ctx));
189 /* Process the remaining bytes in the buffer and put result from CTX
190 in first 16 bytes following RESBUF. The result is always in little
191 endian byte order, so that a byte-wise output yields to the wanted
192 ASCII representation of the message digest.
194 IMPORTANT: On some systems it is required that RESBUF is correctly
195 aligned for a 32 bits value. */
196 extern void *md5_finish_ctx __P ((struct md5_ctx *ctx, void *resbuf));
199 /* Put result from CTX in first 16 bytes following RESBUF. The result is
200 always in little endian byte order, so that a byte-wise output yields
201 to the wanted ASCII representation of the message digest.
203 IMPORTANT: On some systems it is required that RESBUF is correctly
204 aligned for a 32 bits value. */
205 extern void *md5_read_ctx __P ((const struct md5_ctx *ctx, void *resbuf));
208 /* Compute MD5 message digest for bytes read from STREAM. The
209 resulting message digest number will be written into the 16 bytes
210 beginning at RESBLOCK. */
211 extern int md5_stream __P ((FILE *stream, void *resblock));
213 /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
214 result is always in little endian byte order, so that a byte-wise
215 output yields to the wanted ASCII representation of the message
217 extern void *md5_buffer __P ((const char *buffer, size_t len, void *resblock));
221 //----------------------------------------------------------------------------
222 //--------end of md5.h
223 //----------------------------------------------------------------------------
227 /* This array contains the bytes used to pad the buffer to the next
228 64-byte boundary. (RFC 1321, 3.1: Step 1) */
229 static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
231 /* Initialize structure containing state of computation.
232 (RFC 1321, 3.3: Step 3) */
233 void md5_init_ctx(struct md5_ctx *ctx)
240 ctx->total[0] = ctx->total[1] = 0;
244 /* Put result from CTX in first 16 bytes following RESBUF. The result
245 must be in little endian byte order.
247 IMPORTANT: On some systems it is required that RESBUF is correctly
248 aligned for a 32 bits value. */
249 void *md5_read_ctx(const struct md5_ctx *ctx, void *resbuf)
251 ((md5_uint32 *) resbuf)[0] = SWAP(ctx->A);
252 ((md5_uint32 *) resbuf)[1] = SWAP(ctx->B);
253 ((md5_uint32 *) resbuf)[2] = SWAP(ctx->C);
254 ((md5_uint32 *) resbuf)[3] = SWAP(ctx->D);
259 /* Process the remaining bytes in the internal buffer and the usual
260 prolog according to the standard and write the result to RESBUF.
262 IMPORTANT: On some systems it is required that RESBUF is correctly
263 aligned for a 32 bits value. */
264 void *md5_finish_ctx(struct md5_ctx *ctx, void *resbuf)
266 /* Take yet unprocessed bytes into account. */
267 md5_uint32 bytes = ctx->buflen;
270 /* Now count remaining bytes. */
271 ctx->total[0] += bytes;
272 if (ctx->total[0] < bytes)
275 pad = bytes >= 56 ? 64 + 56 - bytes : 56 - bytes;
276 memcpy(&ctx->buffer[bytes], fillbuf, pad);
278 /* Put the 64-bit file length in *bits* at the end of the buffer. */
279 *(md5_uint32 *) & ctx->buffer[bytes + pad] = SWAP(ctx->total[0] << 3);
280 *(md5_uint32 *) & ctx->buffer[bytes + pad + 4] =
281 SWAP((ctx->total[1] << 3) | (ctx->total[0] >> 29));
283 /* Process last bytes. */
284 md5_process_block(ctx->buffer, bytes + pad + 8, ctx);
286 return md5_read_ctx(ctx, resbuf);
289 /* Compute MD5 message digest for bytes read from STREAM. The
290 resulting message digest number will be written into the 16 bytes
291 beginning at RESBLOCK. */
292 int md5_stream(FILE *stream, void *resblock)
294 /* Important: BLOCKSIZE must be a multiple of 64. */
295 #define BLOCKSIZE 4096
297 char buffer[BLOCKSIZE + 72];
300 /* Initialize the computation context. */
303 /* Iterate over full file contents. */
305 /* We read the file in blocks of BLOCKSIZE bytes. One call of the
306 computation function processes the whole buffer so that with the
307 next round of the loop another block can be read. */
311 /* Read block. Take care for partial reads. */
313 n = fread(buffer + sum, 1, BLOCKSIZE - sum, stream);
317 while (sum < BLOCKSIZE && n != 0);
318 if (n == 0 && ferror(stream))
321 /* If end of file is reached, end the loop. */
325 /* Process buffer with BLOCKSIZE bytes. Note that
328 md5_process_block(buffer, BLOCKSIZE, &ctx);
331 /* Add the last bytes if necessary. */
333 md5_process_bytes(buffer, sum, &ctx);
335 /* Construct result in desired memory. */
336 md5_finish_ctx(&ctx, resblock);
340 /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
341 result is always in little endian byte order, so that a byte-wise
342 output yields to the wanted ASCII representation of the message
344 void *md5_buffer(const char *buffer, size_t len, void *resblock)
348 /* Initialize the computation context. */
351 /* Process whole buffer but last len % 64 bytes. */
352 md5_process_bytes(buffer, len, &ctx);
354 /* Put result in desired memory area. */
355 return md5_finish_ctx(&ctx, resblock);
358 void md5_process_bytes(const void *buffer, size_t len, struct md5_ctx *ctx)
360 /* When we already have some bits in our internal buffer concatenate
361 both inputs first. */
362 if (ctx->buflen != 0) {
363 size_t left_over = ctx->buflen;
364 size_t add = 128 - left_over > len ? len : 128 - left_over;
366 memcpy(&ctx->buffer[left_over], buffer, add);
369 if (left_over + add > 64) {
370 md5_process_block(ctx->buffer, (left_over + add) & ~63, ctx);
371 /* The regions in the following copy operation cannot overlap. */
372 memcpy(ctx->buffer, &ctx->buffer[(left_over + add) & ~63],
373 (left_over + add) & 63);
374 ctx->buflen = (left_over + add) & 63;
377 buffer = (const char *) buffer + add;
381 /* Process available complete blocks. */
383 md5_process_block(buffer, len & ~63, ctx);
384 buffer = (const char *) buffer + (len & ~63);
388 /* Move remaining bytes in internal buffer. */
390 memcpy(ctx->buffer, buffer, len);
395 /* These are the four functions used in the four steps of the MD5 algorithm
396 and defined in the RFC 1321. The first function is a little bit optimized
397 (as found in Colin Plumbs public domain implementation). */
398 /* #define FF(b, c, d) ((b & c) | (~b & d)) */
399 #define FF(b, c, d) (d ^ (b & (c ^ d)))
400 #define FG(b, c, d) FF (d, b, c)
401 #define FH(b, c, d) (b ^ c ^ d)
402 #define FI(b, c, d) (c ^ (b | ~d))
404 /* Process LEN bytes of BUFFER, accumulating context into CTX.
405 It is assumed that LEN % 64 == 0. */
406 void md5_process_block(const void *buffer, size_t len, struct md5_ctx *ctx)
408 md5_uint32 correct_words[16];
409 const md5_uint32 *words = buffer;
410 size_t nwords = len / sizeof(md5_uint32);
411 const md5_uint32 *endp = words + nwords;
412 md5_uint32 A = ctx->A;
413 md5_uint32 B = ctx->B;
414 md5_uint32 C = ctx->C;
415 md5_uint32 D = ctx->D;
417 /* First increment the byte count. RFC 1321 specifies the possible
418 length of the file up to 2^64 bits. Here we only compute the
419 number of bytes. Do a double word increment. */
420 ctx->total[0] += len;
421 if (ctx->total[0] < len)
424 /* Process all bytes in the buffer with 64 bytes in each round of
426 while (words < endp) {
427 md5_uint32 *cwp = correct_words;
428 md5_uint32 A_save = A;
429 md5_uint32 B_save = B;
430 md5_uint32 C_save = C;
431 md5_uint32 D_save = D;
433 /* First round: using the given function, the context and a constant
434 the next context is computed. Because the algorithms processing
435 unit is a 32-bit word and it is determined to work on words in
436 little endian byte order we perhaps have to change the byte order
437 before the computation. To reduce the work for the next steps
438 we store the swapped words in the array CORRECT_WORDS. */
440 #define OP(a, b, c, d, s, T) \
443 a += FF (b, c, d) + (*cwp++ = SWAP (*words)) + T; \
450 /* It is unfortunate that C does not provide an operator for
451 cyclic rotation. Hope the C compiler is smart enough. */
452 #define CYCLIC(w, s) (w = (w << s) | (w >> (32 - s)))
454 /* Before we start, one word to the strange constants.
455 They are defined in RFC 1321 as
457 T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64
461 OP(A, B, C, D, 7, 0xd76aa478);
462 OP(D, A, B, C, 12, 0xe8c7b756);
463 OP(C, D, A, B, 17, 0x242070db);
464 OP(B, C, D, A, 22, 0xc1bdceee);
465 OP(A, B, C, D, 7, 0xf57c0faf);
466 OP(D, A, B, C, 12, 0x4787c62a);
467 OP(C, D, A, B, 17, 0xa8304613);
468 OP(B, C, D, A, 22, 0xfd469501);
469 OP(A, B, C, D, 7, 0x698098d8);
470 OP(D, A, B, C, 12, 0x8b44f7af);
471 OP(C, D, A, B, 17, 0xffff5bb1);
472 OP(B, C, D, A, 22, 0x895cd7be);
473 OP(A, B, C, D, 7, 0x6b901122);
474 OP(D, A, B, C, 12, 0xfd987193);
475 OP(C, D, A, B, 17, 0xa679438e);
476 OP(B, C, D, A, 22, 0x49b40821);
478 /* For the second to fourth round we have the possibly swapped words
479 in CORRECT_WORDS. Redefine the macro to take an additional first
480 argument specifying the function to use. */
482 #define OP(f, a, b, c, d, k, s, T) \
485 a += f (b, c, d) + correct_words[k] + T; \
492 OP(FG, A, B, C, D, 1, 5, 0xf61e2562);
493 OP(FG, D, A, B, C, 6, 9, 0xc040b340);
494 OP(FG, C, D, A, B, 11, 14, 0x265e5a51);
495 OP(FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
496 OP(FG, A, B, C, D, 5, 5, 0xd62f105d);
497 OP(FG, D, A, B, C, 10, 9, 0x02441453);
498 OP(FG, C, D, A, B, 15, 14, 0xd8a1e681);
499 OP(FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
500 OP(FG, A, B, C, D, 9, 5, 0x21e1cde6);
501 OP(FG, D, A, B, C, 14, 9, 0xc33707d6);
502 OP(FG, C, D, A, B, 3, 14, 0xf4d50d87);
503 OP(FG, B, C, D, A, 8, 20, 0x455a14ed);
504 OP(FG, A, B, C, D, 13, 5, 0xa9e3e905);
505 OP(FG, D, A, B, C, 2, 9, 0xfcefa3f8);
506 OP(FG, C, D, A, B, 7, 14, 0x676f02d9);
507 OP(FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
510 OP(FH, A, B, C, D, 5, 4, 0xfffa3942);
511 OP(FH, D, A, B, C, 8, 11, 0x8771f681);
512 OP(FH, C, D, A, B, 11, 16, 0x6d9d6122);
513 OP(FH, B, C, D, A, 14, 23, 0xfde5380c);
514 OP(FH, A, B, C, D, 1, 4, 0xa4beea44);
515 OP(FH, D, A, B, C, 4, 11, 0x4bdecfa9);
516 OP(FH, C, D, A, B, 7, 16, 0xf6bb4b60);
517 OP(FH, B, C, D, A, 10, 23, 0xbebfbc70);
518 OP(FH, A, B, C, D, 13, 4, 0x289b7ec6);
519 OP(FH, D, A, B, C, 0, 11, 0xeaa127fa);
520 OP(FH, C, D, A, B, 3, 16, 0xd4ef3085);
521 OP(FH, B, C, D, A, 6, 23, 0x04881d05);
522 OP(FH, A, B, C, D, 9, 4, 0xd9d4d039);
523 OP(FH, D, A, B, C, 12, 11, 0xe6db99e5);
524 OP(FH, C, D, A, B, 15, 16, 0x1fa27cf8);
525 OP(FH, B, C, D, A, 2, 23, 0xc4ac5665);
528 OP(FI, A, B, C, D, 0, 6, 0xf4292244);
529 OP(FI, D, A, B, C, 7, 10, 0x432aff97);
530 OP(FI, C, D, A, B, 14, 15, 0xab9423a7);
531 OP(FI, B, C, D, A, 5, 21, 0xfc93a039);
532 OP(FI, A, B, C, D, 12, 6, 0x655b59c3);
533 OP(FI, D, A, B, C, 3, 10, 0x8f0ccc92);
534 OP(FI, C, D, A, B, 10, 15, 0xffeff47d);
535 OP(FI, B, C, D, A, 1, 21, 0x85845dd1);
536 OP(FI, A, B, C, D, 8, 6, 0x6fa87e4f);
537 OP(FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
538 OP(FI, C, D, A, B, 6, 15, 0xa3014314);
539 OP(FI, B, C, D, A, 13, 21, 0x4e0811a1);
540 OP(FI, A, B, C, D, 4, 6, 0xf7537e82);
541 OP(FI, D, A, B, C, 11, 10, 0xbd3af235);
542 OP(FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
543 OP(FI, B, C, D, A, 9, 21, 0xeb86d391);
545 /* Add the starting values of the context. */
552 /* Put checksum in context given as argument. */
559 //----------------------------------------------------------------------------
560 //--------end of md5.c
561 //----------------------------------------------------------------------------
563 #define ISWHITE(c) ((c) == ' ' || (c) == '\t')
564 #define IN_CTYPE_DOMAIN(c) 1
565 #define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c))
566 #define STREQ(a, b) (strcmp ((a), (b)) == 0)
567 #define TOLOWER(Ch) tolower (Ch)
568 #define OPENOPTS(BINARY) "r"
570 /* The minimum length of a valid digest line in a file produced
571 by `md5sum FILE' and read by `md5sum -c'. This length does
572 not include any newline character at the end of a line. */
573 #define MIN_DIGEST_LINE_LENGTH 35 /* 32 - message digest length
574 2 - blank and binary indicator
575 1 - minimum filename length */
577 static int have_read_stdin; /* Nonzero if any of the files read were
578 the standard input. */
580 static int status_only = 0; /* With -c, don't generate any output.
581 The exit code indicates success or failure */
582 static int warn = 0; /* With -w, print a message to standard error warning
583 about each improperly formatted MD5 checksum line */
585 static const char md5sum_usage[] =
586 "md5sum [OPTION] [FILE]...\n"
587 "or: md5sum [OPTION] -c [FILE]\n"
588 #ifndef BB_FEATURE_TRIVIAL_HELP
589 "\nPrint or check MD5 checksums.\n\n"
591 "With no FILE, or when FILE is -, read standard input.\n\n"
592 "\t-b\tread files in binary mode\n"
593 "\t-c\tcheck MD5 sums against given list\n"
594 "\t-t\tread files in text mode (default)\n"
595 "\t-g\tread a string\n"
596 "\nThe following two options are useful only when verifying checksums:\n"
597 "\t-s,\tdon't output anything, status code shows success\n"
598 "\t-w,\twarn about improperly formated MD5 checksum lines\n"
602 static int split_3(char *s,
609 int escaped_filename = 0;
611 while (ISWHITE(s[i]))
614 /* The line must have at least 35 (36 if the first is a backslash)
615 more characters to contain correct message digest information.
616 Ignore this line if it is too short. */
617 if (!(s_len - i >= MIN_DIGEST_LINE_LENGTH
618 || (s[i] == '\\' && s_len - i >= 1 + MIN_DIGEST_LINE_LENGTH)))
623 escaped_filename = 1;
625 *u = (unsigned char *) &s[i];
627 /* The first field has to be the 32-character hexadecimal
628 representation of the message digest. If it is not followed
629 immediately by a white space it's an error. */
636 if (s[i] != ' ' && s[i] != '*')
638 *binary = (s[i++] == '*');
640 /* All characters between the type indicator and end of line are
641 significant -- that includes leading and trailing white space. */
644 if (escaped_filename) {
645 /* Translate each `\n' string in the file name to a NEWLINE,
646 and each `\\' string to a backslash. */
653 if (i == s_len - 1) {
654 /* A valid line does not end with a backslash. */
666 /* Only `\' or `n' may follow a backslash. */
672 /* The file name may not contain a NUL. */
686 static int hex_digits(unsigned char const *s)
696 /* An interface to md5_stream. Operate on FILENAME (it may be "-") and
697 put the result in *MD5_RESULT. Return non-zero upon failure, zero
698 to indicate success. */
699 static int md5_file(const char *filename,
701 unsigned char *md5_result)
705 if (STREQ(filename, "-")) {
709 fp = fopen(filename, OPENOPTS(binary));
711 errorMsg("md5sum: %s: %s\n", filename, strerror(errno));
716 if (md5_stream(fp, md5_result)) {
717 errorMsg("md5sum: %s: %s\n", filename, strerror(errno));
724 if (fp != stdin && fclose(fp) == EOF) {
725 errorMsg("md5sum: %s: %s\n", filename, strerror(errno));
732 static int md5_check(const char *checkfile_name)
734 FILE *checkfile_stream;
735 int n_properly_formated_lines = 0;
736 int n_mismatched_checksums = 0;
737 int n_open_or_read_failures = 0;
738 unsigned char md5buffer[16];
741 size_t line_chars_allocated;
743 if (STREQ(checkfile_name, "-")) {
745 checkfile_stream = stdin;
747 checkfile_stream = fopen(checkfile_name, "r");
748 if (checkfile_stream == NULL) {
749 errorMsg("md5sum: %s: %s\n", checkfile_name, strerror(errno));
756 line_chars_allocated = 0;
761 unsigned char *md5num;
766 line_length = getline(&line, &line_chars_allocated, checkfile_stream);
768 if (line_length <= 0)
771 /* Ignore comment lines, which begin with a '#' character. */
775 /* Remove any trailing newline. */
776 if (line[line_length - 1] == '\n')
777 line[--line_length] = '\0';
779 if (split_3(line, line_length, &md5num, &binary, &filename)
780 || !hex_digits(md5num)) {
782 errorMsg("%s: %lu: improperly formatted MD5 checksum line\n",
783 checkfile_name, (unsigned long) line_number);
786 static const char bin2hex[] = {
793 ++n_properly_formated_lines;
795 if (md5_file(filename, binary, md5buffer)) {
796 ++n_open_or_read_failures;
798 printf("%s: FAILED open or read\n", filename);
803 /* Compare generated binary number with text representation
804 in check file. Ignore case of hex digits. */
805 for (cnt = 0; cnt < 16; ++cnt) {
806 if (TOLOWER(md5num[2 * cnt])
807 != bin2hex[md5buffer[cnt] >> 4]
808 || (TOLOWER(md5num[2 * cnt + 1])
809 != (bin2hex[md5buffer[cnt] & 0xf])))
813 ++n_mismatched_checksums;
816 printf("%s: %s\n", filename,
817 (cnt != 16 ? "FAILED" : "OK"));
824 while (!feof(checkfile_stream) && !ferror(checkfile_stream));
829 if (ferror(checkfile_stream)) {
830 errorMsg("%s: read error", checkfile_name); /* */
834 if (checkfile_stream != stdin && fclose(checkfile_stream) == EOF) {
835 errorMsg("md5sum: %s: %s\n", checkfile_name, strerror(errno));
839 if (n_properly_formated_lines == 0) {
840 /* Warn if no tests are found. */
841 errorMsg("%s: no properly formatted MD5 checksum lines found\n",
846 int n_computed_checkums = (n_properly_formated_lines
847 - n_open_or_read_failures);
849 if (n_open_or_read_failures > 0) {
850 errorMsg("WARNING: %d of %d listed files could not be read\n",
851 n_open_or_read_failures, n_properly_formated_lines);
855 if (n_mismatched_checksums > 0) {
856 errorMsg("WARNING: %d of %d computed checksums did NOT match\n",
857 n_mismatched_checksums, n_computed_checkums);
863 return ((n_properly_formated_lines > 0 && n_mismatched_checksums == 0
864 && n_open_or_read_failures == 0) ? 0 : 1);
867 int md5sum_main(int argc,
870 unsigned char md5buffer[16];
873 char **string = NULL;
874 size_t n_strings = 0;
876 int file_type_specified = 0;
879 while ((opt = getopt(argc, argv, "g:bcstw")) != -1) {
881 case 'g': { /* read a string */
883 string = (char **) xmalloc ((argc - 1) * sizeof (char *));
887 string[n_strings++] = optarg;
891 case 'b': /* read files in binary mode */
892 file_type_specified = 1;
896 case 'c': /* check MD5 sums against given list */
900 case 's': /* don't output anything, status code shows success */
905 case 't': /* read files in text mode (default) */
906 file_type_specified = 1;
910 case 'w': /* warn about improperly formated MD5 checksum lines */
920 if (file_type_specified && do_check) {
921 errorMsg("the -b and -t options are meaningless when verifying checksums\n");
925 if (n_strings > 0 && do_check) {
926 errorMsg("the -g and -c options are mutually exclusive\n");
930 if (status_only && !do_check) {
931 errorMsg("the -s option is meaningful only when verifying checksums\n");
935 if (warn && !do_check) {
936 errorMsg("the -w option is meaningful only when verifying checksums\n");
944 errorMsg("no files may be specified when using -g\n");
947 for (i = 0; i < n_strings; ++i) {
949 md5_buffer (string[i], strlen (string[i]), md5buffer);
951 for (cnt = 0; cnt < 16; ++cnt)
952 printf ("%02x", md5buffer[cnt]);
954 printf (" \"%s\"\n", string[i]);
956 } else if (do_check) {
957 if (optind + 1 < argc) {
958 errorMsg("only one argument may be specified when using -c\n");
961 err = md5_check ((optind == argc) ? "-" : argv[optind]);
966 for (; optind < argc; ++optind) {
968 char *file = argv[optind];
970 fail = md5_file (file, binary, md5buffer);
974 /* Output a leading backslash if the file name contains
975 a newline or backslash. */
976 if (strchr (file, '\n') || strchr (file, '\\'))
979 for (i = 0; i < 16; ++i)
980 printf ("%02x", md5buffer[i]);
988 /* Translate each NEWLINE byte to the string, "\\n",
989 and each backslash to "\\\\". */
990 for (i = 0; i < strlen (file); ++i) {
993 fputs ("\\n", stdout);
997 fputs ("\\\\", stdout);
1010 if (fclose (stdout) == EOF) {
1011 errorMsg("write error");
1015 if (have_read_stdin && fclose (stdin) == EOF) {
1016 errorMsg("standard input");
1020 exit (err == 0 ? TRUE : FALSE);