--- /dev/null
+/* Compute MD5 checksum of files or strings according to the definition
+ of MD5 in RFC 1321 from April 1992.
+ Copyright (C) 1995 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* If you want to use this code in your own program as a library just
+ define the preprocessor macro `USE_AS_LIBRARY'.
+
+ cc -DUSE_AS_LIBRARY -c md5sum.c
+ */
+
+/* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <getopt.h>
+#include <stdio.h>
+#include <values.h>
+#include <sys/types.h>
+
+#include "system.h"
+#include "error.h"
+#include "version.h"
+
+#ifdef WORDS_BIGENDIAN
+# define SWAP(n) \
+ ((n << 24) | ((n & 0xff00) << 8) | ((n >> 8) & 0xff00) | (n >> 24))
+#else
+# define SWAP(n) (n)
+#endif
+
+/* For performance reasons we use low-level I/O whenever possible. */
+#if defined UNIX || defined unix
+# define FILETYPE int
+# define STDINFILE STDIN_FILENO
+# define OPEN open
+# define OPENOPTS O_RDONLY
+# define ILLFILEVAL -1
+# define READ(f, b, n) read ((f), (b), (n))
+#else
+# ifdef MSDOS
+# define TEXT1TO1 "rb"
+# define TEXTCNVT "r"
+# elif defined VMS
+# define TEXT1TO1 "rb", "ctx=stm"
+# define TEXTCNVT "r", "ctx=stm"
+# endif
+# define FILETYPE FILE *
+# define STDINFILE stdin
+# define OPEN fopen
+# define OPENOPTS (binary != 0 ? TEXT1TO1 : TEXTCNVT)
+# define ILLFILEVAL NULL
+# define READ(f, b, n) fread ((b), 1, (n), (f))
+#endif
+
+#if defined __STDC__ && __STDC__
+# define __P(args) args
+#else
+# define __P(args) ()
+#endif
+
+#ifdef __GNUC__
+# define INLINE __inline
+#endif
+
+#if SIZEOF_UNSIGNED_INT == 4
+typedef unsigned int uint32;
+#elif SIZEOF_UNSIGNED_SHORT == 4
+typedef unsigned short uint32;
+#else
+ /* The following line is intended to throw an error. Using #error is
+ not portable enough. */
+ "Cannot determine unsigned 32-bit data type. I'm screwed"
+#endif
+
+/* Hook for i18n. */
+#define _(str) str
+
+/* Structure to safe state of computation between the single steps. */
+struct md5_ctx
+{
+ uint32 A;
+ uint32 B;
+ uint32 C;
+ uint32 D;
+};
+
+/* The name this program was run with. */
+char *program_name;
+
+/* 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, };
+
+
+static const struct option long_options[] =
+{
+ { "binary", no_argument, 0, 'b' },
+ { "check", required_argument, 0, 'c' },
+ { "help", no_argument, 0, 'h' },
+ { "string", required_argument, 0, 's' },
+ { "text", no_argument, 0, 't' },
+ { "verbose", no_argument, 0, 'v' },
+ { "version", no_argument, 0, 'V' },
+};
+
+/* Prototypes for local functions. */
+static void usage __P ((int status));
+static INLINE void init __P ((struct md5_ctx *ctx));
+static INLINE void *result __P ((struct md5_ctx *ctx, void *resbuf));
+void *md5_file __P ((const char *filename, void *resblock, int binary));
+void *md5_buffer __P ((const char *buffer, size_t len, void *resblock));
+static void process_buffer __P ((const void *buffer, size_t len,
+ struct md5_ctx *ctx));
+
+
+#ifndef USE_AS_LIBRARY
+int
+main (argc, argv)
+ int argc;
+ char *argv[];
+{
+ unsigned char md5buffer[16];
+ const char *check_file = NULL;
+ int binary = 1;
+ int do_help = 0;
+ int do_version = 0;
+ int verbose = 0;
+ int did_string = 0;
+ int opt;
+
+ /* Setting valuesof global variables. */
+ program_name = argv[0];
+
+ while ((opt = getopt_long (argc, argv, "bc:hs::tvV", long_options, NULL))
+ != EOF)
+ switch (opt)
+ {
+ case 0: /* long option */
+ break;
+ case 'b':
+ binary = 1;
+ break;
+ case 'c':
+ check_file = optarg;
+ break;
+ case 'h':
+ do_help = 1;
+ break;
+ case 's':
+ {
+ size_t cnt;
+
+ if (optarg == NULL)
+ optarg = "";
+
+ md5_buffer (optarg, strlen (optarg), md5buffer);
+
+ for (cnt = 0; cnt < 16; ++cnt)
+ printf ("%02x", md5buffer[cnt]);
+
+ printf (" b \"%s\"\n", optarg);
+
+ did_string = 1;
+ }
+ break;
+ case 't':
+ binary = 0;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 'V':
+ do_version = 1;
+ break;
+ default:
+ usage (1);
+ }
+
+ if (did_string != 0)
+ exit (0);
+
+ if (do_version)
+ {
+ printf ("md5sum - %s\n", version_string);
+ exit (0);
+ }
+
+ if (do_help)
+ usage (0);
+
+ if (check_file == NULL)
+ {
+ for (; optind < argc; ++optind)
+ {
+ size_t cnt;
+
+ md5_file (argv[optind], md5buffer, binary);
+
+ for (cnt = 0; cnt < 16; ++cnt)
+ printf ("%02x", md5buffer[cnt]);
+
+ printf (" %c %s\n", binary ? 'b' : 't', argv[optind]);
+ }
+ }
+ else
+ {
+ FILE *cfp;
+ int tests_all = 0;
+ int tests_failed = 0;
+
+ cfp = fopen (check_file, "r");
+ if (cfp == NULL)
+ error (1, errno, _("while opening check file"));
+
+ do
+ {
+ char line[1024];
+ char filename[FILENAME_MAX];
+ char binary;
+ char md5num[32];
+ int items;
+
+ if (fgets (line, 1024, cfp) == NULL)
+ break;
+
+ items = sscanf (line, "%32c %c %s", md5num, &binary, filename);
+
+ if (items != 3)
+ {
+ if (verbose)
+ error (0, 0, _("illegal line in check file: %s"), line);
+ }
+ else
+ {
+ static const char bin2hex[] = { '0', '1', '2', '3',
+ '4', '5', '6', '7',
+ '8', '9', 'a', 'b',
+ 'c', 'd', 'e', 'f' };
+ size_t cnt;
+
+ printf ("%s: ", filename);
+ if (verbose)
+ fflush (stdout);
+
+ ++tests_all;
+ md5_file (filename, md5buffer, binary == 'b');
+
+ for (cnt = 0; cnt < 16; ++cnt)
+ if (md5num[2 * cnt] != bin2hex[md5buffer[cnt] >> 4]
+ || md5num[2 * cnt + 1] != (bin2hex[md5buffer[cnt] & 0xf]))
+ break;
+
+ puts (cnt < 16 ? (++tests_failed, _("FAILED")) : _("OK"));
+ }
+ }
+ while (!feof (cfp));
+
+ printf (_("%d out of %d tests failed\n"), tests_failed, tests_all);
+ }
+
+ exit (0);
+}
+
+
+static void
+usage (status)
+ int status;
+{
+ if (status != 0)
+ fprintf (stderr, _("Try `%s --help' for more information.\n"),
+ program_name);
+ else
+ printf (_("Usage: %s [OPTION] [FILE]...\n\
+Mandatory arguments to long options are mandatory for short options too.\n\
+\n\
+ -h, --help display this help and exit\n\
+ -v, --verbose verbose output level\n\
+ -V, --version output version information and exit\n\
+\n\
+ -b, --binary read files in binary mode (default)\n\
+ -t, --text read files in text mode\n\
+\n\
+ -c, --check=FILE check MD5 sums against list in FILE\n\
+ -s, --string[=STRING] compute checksum for STRING\n\
+\n\
+The sums are computed as described in RFC 1321. The file given at the -c\n\
+option should be a former output of this program. The default mode is to\n\
+produce a list with the checksum informations. A file name - denotes stdin.\n"),
+ program_name);
+
+ exit (status);
+}
+#endif
+
+
+/* Initialize structure containing state of computation.
+ (RFC 1321, 3.3: Step 3) */
+static INLINE void
+init (ctx)
+ struct md5_ctx *ctx;
+{
+ ctx->A = 0x67452301;
+ ctx->B = 0xefcdab89;
+ ctx->C = 0x98badcfe;
+ ctx->D = 0x10325476;
+}
+
+/* Put result from CTX in first 16 bytes following RESBUF. The result must
+ be in little endian byte order. */
+static INLINE void *
+result (ctx, resbuf)
+ struct md5_ctx *ctx;
+ void *resbuf;
+{
+ ((uint32 *) resbuf)[0] = SWAP (ctx->A);
+ ((uint32 *) resbuf)[1] = SWAP (ctx->B);
+ ((uint32 *) resbuf)[2] = SWAP (ctx->C);
+ ((uint32 *) resbuf)[3] = SWAP (ctx->D);
+
+ return resbuf;
+}
+
+
+/* Read file FILENAME and process it using the MD5 algorithm. When BINARY
+ is != 0 and has a "special" text file format (e.g. MSDOG) conversation
+ takes place while reading. The resulting checksum will be placed in the
+ first 16 bytes following RESBLOCK. */
+/* ARGSUSED */
+void *
+md5_file (filename, resblock, binary)
+ const char *filename;
+ void *resblock;
+ int binary;
+{
+#define BLOCKSIZE 4096
+ struct md5_ctx ctx;
+ uint32 len[2] = { 0, 0 };
+ char buffer[BLOCKSIZE + 72];
+ size_t pad, sum;
+ FILETYPE f;
+
+ /* File name - means stdin. */
+ if (strcmp (filename, "-") == 0)
+ f = STDINFILE;
+ else
+ {
+ /* OPEN and OPENOPTS are macro. They vary according to the system
+ used. For UN*X systems it is simply open(), but for dumb systems
+ like MSDOG it is fopen. Of course are the reading functions
+ chosen according to the open function. */
+
+ f = OPEN (filename, OPENOPTS);
+ if (f == ILLFILEVAL)
+ error (1, errno, _("while opening input file `%s'"), filename);
+ }
+
+ /* Initialize the computation context. */
+ init (&ctx);
+
+ /* Iterate over full file contents. */
+ while (1)
+ {
+ /* We read the file in blocks of BLOCKSIZE bytes. One call of the
+ computation funtion 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 = READ (f, buffer, BLOCKSIZE - sum);
+
+ sum += n;
+ }
+ while (sum < BLOCKSIZE && n != 0);
+
+ /* RCS 1321 specifies the possible length of the file upto 2^64 bits.
+ Here we only compute the number of bytes. Do a double word
+ increment. */
+ len[0] += sum;
+ if (len[0] < sum)
+ ++len[1];
+
+ /* If end of file is reached end the loop. */
+ if (n == 0)
+ break;
+
+ /* Process buffer with BLOCKSIZE bytes. Please note take
+ BLOCKSIZE % 64 == 0
+ */
+ process_buffer (buffer, BLOCKSIZE, &ctx);
+ }
+
+ /* We can copy 64 byte because the buffer is always big enough. FILLBUF
+ contains the needed bits. */
+ memcpy (&buffer[sum], fillbuf, 64);
+
+ /* Compute amount of padding bytes needed. Alignment is done to
+ (N + PAD) % 64 == 56
+ There is always at least one byte padded. I.e. even the alignment
+ is correctly aligned 64 padding bytes are added. */
+ pad = sum & 63;
+ pad = pad >= 56 ? 64 + 56 - pad : 56 - pad;
+
+ /* Put the 64-bit file length in *bits* at the end of the buffer. */
+ *(uint32 *) &buffer[sum + pad] = SWAP (len[0] << 3);
+ *(uint32 *) &buffer[sum + pad + 4] = SWAP ((len[1] << 3) | (len[0] >> 29));
+
+ /* Process last bytes. */
+ process_buffer (buffer, sum + pad + 8, &ctx);
+
+ /* Construct result in desired memory. */
+ return result (&ctx, resblock);
+}
+
+void *
+md5_buffer (buffer, len, resblock)
+ const char *buffer;
+ size_t len;
+ void *resblock;
+{
+ struct md5_ctx ctx;
+ char restbuf[64 + 72];
+ size_t blocks = len & ~63;
+ size_t pad, rest;
+
+ /* Initialize the computation context. */
+ init (&ctx);
+
+ /* Process whole buffer but last len % 64 bytes. */
+ process_buffer (buffer, blocks, &ctx);
+
+ /* REST bytes are not processed yet. */
+ rest = len - blocks;
+ /* Copy to own buffer. */
+ memcpy (restbuf, &buffer[blocks], rest);
+ /* Append needed fill bytes at end of buffer. We can copy 64 byte
+ because the buffer is always big enough. */
+ memcpy (&restbuf[rest], fillbuf, 64);
+
+ /* PAD bytes are used for padding to correct alignment. Note that
+ always at least one byte is padded. */
+ pad = rest >= 56 ? 64 + 56 - rest : 56 - rest;
+
+ /* Put length of buffer in *bits* in last eight bytes. */
+ *(uint32 *) &restbuf[rest + pad] = SWAP (len << 3);
+ *(uint32 *) &restbuf[rest + pad + 4] = SWAP (len >> 29);
+
+ /* Process last bytes. */
+ process_buffer (restbuf, rest + pad + 8, &ctx);
+
+ /* Put result in desired memory area. */
+ return result (&ctx, resblock);
+}
+
+
+/* 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) ((work.b & work.c) | (~work.b & work.d)) */
+#define FF(b, c, d) (work.d ^ (work.b & (work.c ^ work.d)))
+#define FG(b, c, d) FF (d, b, c)
+#define FH(b, c, d) (work.b ^ work.c ^ work.d)
+#define FI(b, c, d) (work.c ^ (work.b | ~work.d))
+
+/* Process the next LEN bytes following BUFFER and use the context given
+ in CTX. It is assumed that
+ LEN % 64 == 0
+ */
+static void
+process_buffer (buffer, len, ctx)
+ const void *buffer;
+ size_t len;
+ struct md5_ctx *ctx;
+{
+ uint32 correct_words[16];
+ const uint32 *words = buffer;
+ size_t nwords = len / sizeof (uint32);
+ const uint32 *endp = words + nwords;
+ struct md5_ctx work = *ctx;
+
+ /* Process all bytes in the buffer with 64 bytes in each round of
+ the loop. */
+ while (words < endp)
+ {
+ struct md5_ctx save = work;
+ uint32 *cwp = correct_words;
+
+ /* 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) \
+ { \
+ work.a += FF (b, c, d) + (*cwp++ = SWAP (*words)) + T; \
+ ++words; \
+ CYCLIC (work.a, s); \
+ work.a += work.b; \
+ }
+
+ /* It is sad that C does not provide an operator for cyclic rotation.
+ Hope the C compiler is smart enough. */
+#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
+ */
+
+ /* 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)
+
+ /* 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) \
+ { \
+ work.a += f (b, c, d) + correct_words[k] + T; \
+ CYCLIC (work.a, s); \
+ work.a += work.b; \
+ }
+
+ /* 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)
+
+ /* Add the starting values of the context. */
+ work.A += save.A;
+ work.B += save.B;
+ work.C += save.C;
+ work.D += save.D;
+ }
+
+ /* Put checksum in context given as argument. */
+ *ctx = work;
+}
projects / thirdparty / coreutils.git / commitdiff
