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 || defined _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 int split_3(char *s,
592 int escaped_filename = 0;
594 while (ISWHITE(s[i]))
597 /* The line must have at least 35 (36 if the first is a backslash)
598 more characters to contain correct message digest information.
599 Ignore this line if it is too short. */
600 if (!(s_len - i >= MIN_DIGEST_LINE_LENGTH
601 || (s[i] == '\\' && s_len - i >= 1 + MIN_DIGEST_LINE_LENGTH)))
606 escaped_filename = 1;
608 *u = (unsigned char *) &s[i];
610 /* The first field has to be the 32-character hexadecimal
611 representation of the message digest. If it is not followed
612 immediately by a white space it's an error. */
619 if (s[i] != ' ' && s[i] != '*')
621 *binary = (s[i++] == '*');
623 /* All characters between the type indicator and end of line are
624 significant -- that includes leading and trailing white space. */
627 if (escaped_filename) {
628 /* Translate each `\n' string in the file name to a NEWLINE,
629 and each `\\' string to a backslash. */
636 if (i == s_len - 1) {
637 /* A valid line does not end with a backslash. */
649 /* Only `\' or `n' may follow a backslash. */
655 /* The file name may not contain a NUL. */
669 static int hex_digits(unsigned char const *s)
679 /* An interface to md5_stream. Operate on FILENAME (it may be "-") and
680 put the result in *MD5_RESULT. Return non-zero upon failure, zero
681 to indicate success. */
682 static int md5_file(const char *filename,
684 unsigned char *md5_result)
688 if (STREQ(filename, "-")) {
692 fp = fopen(filename, OPENOPTS(binary));
694 errorMsg("%s: %s\n", filename, strerror(errno));
699 if (md5_stream(fp, md5_result)) {
700 errorMsg("%s: %s\n", filename, strerror(errno));
707 if (fp != stdin && fclose(fp) == EOF) {
708 errorMsg("%s: %s\n", filename, strerror(errno));
715 static int md5_check(const char *checkfile_name)
717 FILE *checkfile_stream;
718 int n_properly_formated_lines = 0;
719 int n_mismatched_checksums = 0;
720 int n_open_or_read_failures = 0;
721 unsigned char md5buffer[16];
724 size_t line_chars_allocated;
726 if (STREQ(checkfile_name, "-")) {
728 checkfile_stream = stdin;
730 checkfile_stream = fopen(checkfile_name, "r");
731 if (checkfile_stream == NULL) {
732 errorMsg("%s: %s\n", checkfile_name, strerror(errno));
739 line_chars_allocated = 0;
744 unsigned char *md5num;
749 line_length = getline(&line, &line_chars_allocated, checkfile_stream);
751 if (line_length <= 0)
754 /* Ignore comment lines, which begin with a '#' character. */
758 /* Remove any trailing newline. */
759 if (line[line_length - 1] == '\n')
760 line[--line_length] = '\0';
762 if (split_3(line, line_length, &md5num, &binary, &filename)
763 || !hex_digits(md5num)) {
765 errorMsg("%s: %lu: improperly formatted MD5 checksum line\n",
766 checkfile_name, (unsigned long) line_number);
769 static const char bin2hex[] = {
776 ++n_properly_formated_lines;
778 if (md5_file(filename, binary, md5buffer)) {
779 ++n_open_or_read_failures;
781 printf("%s: FAILED open or read\n", filename);
786 /* Compare generated binary number with text representation
787 in check file. Ignore case of hex digits. */
788 for (cnt = 0; cnt < 16; ++cnt) {
789 if (TOLOWER(md5num[2 * cnt])
790 != bin2hex[md5buffer[cnt] >> 4]
791 || (TOLOWER(md5num[2 * cnt + 1])
792 != (bin2hex[md5buffer[cnt] & 0xf])))
796 ++n_mismatched_checksums;
799 printf("%s: %s\n", filename,
800 (cnt != 16 ? "FAILED" : "OK"));
807 while (!feof(checkfile_stream) && !ferror(checkfile_stream));
812 if (ferror(checkfile_stream)) {
813 errorMsg("%s: read error\n", checkfile_name); /* */
817 if (checkfile_stream != stdin && fclose(checkfile_stream) == EOF) {
818 errorMsg("md5sum: %s: %s\n", checkfile_name, strerror(errno));
822 if (n_properly_formated_lines == 0) {
823 /* Warn if no tests are found. */
824 errorMsg("%s: no properly formatted MD5 checksum lines found\n",
829 int n_computed_checkums = (n_properly_formated_lines
830 - n_open_or_read_failures);
832 if (n_open_or_read_failures > 0) {
833 errorMsg("WARNING: %d of %d listed files could not be read\n",
834 n_open_or_read_failures, n_properly_formated_lines);
838 if (n_mismatched_checksums > 0) {
839 errorMsg("WARNING: %d of %d computed checksums did NOT match\n",
840 n_mismatched_checksums, n_computed_checkums);
846 return ((n_properly_formated_lines > 0 && n_mismatched_checksums == 0
847 && n_open_or_read_failures == 0) ? 0 : 1);
850 int md5sum_main(int argc,
853 unsigned char md5buffer[16];
856 char **string = NULL;
857 size_t n_strings = 0;
859 int file_type_specified = 0;
862 while ((opt = getopt(argc, argv, "g:bcstw")) != -1) {
864 case 'g': { /* read a string */
866 string = (char **) xmalloc ((argc - 1) * sizeof (char *));
870 string[n_strings++] = optarg;
874 case 'b': /* read files in binary mode */
875 file_type_specified = 1;
879 case 'c': /* check MD5 sums against given list */
883 case 's': /* don't output anything, status code shows success */
888 case 't': /* read files in text mode (default) */
889 file_type_specified = 1;
893 case 'w': /* warn about improperly formated MD5 checksum lines */
903 if (file_type_specified && do_check) {
904 errorMsg("the -b and -t options are meaningless when verifying checksums\n");
908 if (n_strings > 0 && do_check) {
909 errorMsg("the -g and -c options are mutually exclusive\n");
913 if (status_only && !do_check) {
914 errorMsg("the -s option is meaningful only when verifying checksums\n");
918 if (warn && !do_check) {
919 errorMsg("the -w option is meaningful only when verifying checksums\n");
927 errorMsg("no files may be specified when using -g\n");
930 for (i = 0; i < n_strings; ++i) {
932 md5_buffer (string[i], strlen (string[i]), md5buffer);
934 for (cnt = 0; cnt < 16; ++cnt)
935 printf ("%02x", md5buffer[cnt]);
937 printf (" \"%s\"\n", string[i]);
939 } else if (do_check) {
940 if (optind + 1 < argc) {
941 errorMsg("only one argument may be specified when using -c\n");
944 err = md5_check ((optind == argc) ? "-" : argv[optind]);
949 for (; optind < argc; ++optind) {
951 char *file = argv[optind];
953 fail = md5_file (file, binary, md5buffer);
957 /* Output a leading backslash if the file name contains
958 a newline or backslash. */
959 if (strchr (file, '\n') || strchr (file, '\\'))
962 for (i = 0; i < 16; ++i)
963 printf ("%02x", md5buffer[i]);
971 /* Translate each NEWLINE byte to the string, "\\n",
972 and each backslash to "\\\\". */
973 for (i = 0; i < strlen (file); ++i) {
976 fputs ("\\n", stdout);
980 fputs ("\\\\", stdout);
993 if (fclose (stdout) == EOF) {
994 errorMsg("write error\n");
998 if (have_read_stdin && fclose (stdin) == EOF) {
999 errorMsg("standard input\n");
1003 exit (err == 0 ? TRUE : FALSE);