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 <stdio.h>
#include <sys/types.h>
-#if HAVE_LIMITS_H || _LIBC
-# include <limits.h>
-#endif
-
+#include "md5.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. */
+/* Most systems does not make a difference between internal and external
+ text representation. */
#if UNIX || __UNIX__ || unix || __unix__ || _POSIX_VERSION
-# 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))
-# define CLOSE(f) close (f)
+# define OPENOPTS "r"
#else
# ifdef MSDOS
# define TEXT1TO1 "rb"
"Cannot determine system type."
# endif
# 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))
-# define CLOSE(f) fclose (f)
#endif
#undef __P
# define __P(args) ()
#endif
-/* The following contortions are an attempt to use the C preprocessor
- to determine an unsigned integral type that is 32 bits wide. An
- alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
- doing that would require that the configure script compile and *run*
- the resulting executable. Locally running cross-compiled executables
- is usually not possible. */
-
-#if defined __STDC__ && __STDC__
-# define UINT_MAX_32_BITS 4294967295U
-#else
-# define UINT_MAX_32_BITS 0xFFFFFFFF
-#endif
-
-/* If UINT_MAX isn't defined, assume it's a 32-bit type.
- This should be valid for all systems GNU cares about because
- that doesn't include 16-bit systems, and only modern systems
- (that certainly have <limits.h>) have 64+-bit integral types. */
-
-#ifndef UINT_MAX
-# define UINT_MAX UINT_MAX_32_BITS
-#endif
-
-#if UINT_MAX == UINT_MAX_32_BITS
- typedef unsigned int uint32;
+#if _LIBC
+/* GNU C Library has a correct tolower() function. */
+# define TOLOWER(c) tolower (c)
#else
-# if USHRT_MAX == UINT_MAX_32_BITS
- typedef unsigned short uint32;
-# else
-# if ULONG_MAX == UINT_MAX_32_BITS
- typedef unsigned long uint32;
-# else
- /* The following line is intended to evoke an error.
- Using #error is not portable enough. */
- "Cannot determine unsigned 32-bit data type."
-# endif
-# endif
+# define TOLOWER(c) (ISUPPER (c) ? tolower (c) : (c))
#endif
-#define TOLOWER(c) (ISUPPER (c) ? tolower (c) : (c))
-
/* Hook for i18n. */
#define _(str) str
-/* Structure to save 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 /* , 0, 0, ... */ };
-
static const struct option long_options[] =
{
{ "binary", no_argument, 0, 'b' },
char *xmalloc ();
-/* Prototypes for local functions. */
-static void usage __P ((int status));
-static inline void init __P ((struct md5_ctx *ctx));
-static inline void *result __P ((const 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
-
/* FIXME: but this won't work with filenames containing blanks. */
/* FIXME: This is provisory. Use strtok. */
if (n_strings > 0)
{
/* --quiet does not make much sense with --string. */
-
- /* FIXME: allow newline in filename by encoding it. */
if (optind < argc)
{
error (0, 0, _("no files may be specified when using --string"));
for (; optind < argc; ++optind)
{
size_t cnt;
+ FILE *fp;
+
+ if (strcmp (argv[optind], "-") == 0)
+ fp = stdin;
+ else
+ {
+ /* OPENOPTS is a macro. It varies with the system.
+ Some system make a difference between external and
+ internal text representation. */
+
+ fp = fopen (argv[optind], OPENOPTS);
+ if (fp == NULL)
+ error (1, errno, _("while opening input file `%s'"),
+ argv[optind]);
+ }
- md5_file (argv[optind], md5buffer, binary);
+ md5_stream (fp, md5buffer);
+
+ if (fp != stdin)
+ if (fclose (fp) == EOF)
+ error (1, errno, argv[optind]);
for (cnt = 0; cnt < 16; ++cnt)
printf ("%02x", md5buffer[cnt]);
'8', '9', 'a', 'b',
'c', 'd', 'e', 'f' };
size_t cnt;
+ FILE *fp;
if (!quiet)
{
fflush (stdout);
}
+ if (strcmp (filename, "-") == 0)
+ fp = stdin;
+ else
+ {
+ fp = fopen (filename, OPENOPTS);
+ if (fp == NULL)
+ /* The text of this sometimes message completes the
+ message given above. */
+ error (1, errno, quiet ? "%s: " : "", filename);
+ }
+
++n_tests;
- md5_file (filename, md5buffer, type_flag);
+ md5_stream (fp, md5buffer);
+
+ if (fp != stdin)
+ if (fclose (fp) == EOF)
+ error (1, errno, filename);
/* Compare generated binary number with text representation
in check file. Ignore case of hex digits. */
error (1, errno, checkfile_name);
if (!quiet)
- printf (_("%d out of %d tests failed\n"), n_tests_failed, n_tests);
+ printf (n_tests == 1 ? (n_tests_failed ? _("Test failed\n")
+ : _("Test passed\n"))
+ : _("%d out of %d tests failed\n"),
+ n_tests_failed, n_tests);
exit (n_tests_failed > 0);
}
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)
- const 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 non-zero and has a "special" text file format (e.g. MSDOG) conversation
- takes place while reading. The resulting checksum will be written into
- the 16 bytes beginning at RESBLOCK. */
-/* ARGSUSED */
-void *
-md5_file (filename, resblock, binary)
- const char *filename;
- void *resblock;
- int binary;
-{
- /* Important: BLOCKSIZE must be a multiple of 64. */
-#define BLOCKSIZE 4096
- struct md5_ctx ctx;
- uint32 len[2];
- 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);
-
- len[0] = 0;
- len[1] = 0;
-
- /* 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 = READ (f, buffer, BLOCKSIZE - sum);
-
- sum += n;
- }
- while (sum < BLOCKSIZE && n != 0);
-
- /* 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. */
- 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. Note that
- BLOCKSIZE % 64 == 0
- */
- process_buffer (buffer, BLOCKSIZE, &ctx);
- }
-
- /* The complete file contents is read. Close it now. */
- CLOSE (f);
-
- /* 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) ((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
-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;
- uint32 A = ctx->A;
- uint32 B = ctx->B;
- uint32 C = ctx->C;
- uint32 D = ctx->D;
-
- /* Process all bytes in the buffer with 64 bytes in each round of
- the loop. */
- while (words < endp)
- {
- uint32 *cwp = correct_words;
- uint32 A_save = A;
- uint32 B_save = B;
- uint32 C_save = C;
- uint32 D_save = D;
-
- /* 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. */
-#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) \
- do \
- { \
- a += f (b, c, d) + correct_words[k] + T; \
- CYCLIC (a, s); \
- a += b; \
- } \
- while (0)
-
- /* Round 2. */
- OP (FG, A, B, C, D, 1, 5, 0xf61e2562);
- OP (FG, D, A, B, C, 6, 9, 0xc040b340);
- OP (FG, C, D, A, B, 11, 14, 0x265e5a51);
- OP (FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
- OP (FG, A, B, C, D, 5, 5, 0xd62f105d);
- OP (FG, D, A, B, C, 10, 9, 0x02441453);
- OP (FG, C, D, A, B, 15, 14, 0xd8a1e681);
- OP (FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
- OP (FG, A, B, C, D, 9, 5, 0x21e1cde6);
- OP (FG, D, A, B, C, 14, 9, 0xc33707d6);
- OP (FG, C, D, A, B, 3, 14, 0xf4d50d87);
- OP (FG, B, C, D, A, 8, 20, 0x455a14ed);
- OP (FG, A, B, C, D, 13, 5, 0xa9e3e905);
- OP (FG, D, A, B, C, 2, 9, 0xfcefa3f8);
- OP (FG, C, D, A, B, 7, 14, 0x676f02d9);
- OP (FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
-
- /* Round 3. */
- OP (FH, A, B, C, D, 5, 4, 0xfffa3942);
- OP (FH, D, A, B, C, 8, 11, 0x8771f681);
- OP (FH, C, D, A, B, 11, 16, 0x6d9d6122);
- OP (FH, B, C, D, A, 14, 23, 0xfde5380c);
- OP (FH, A, B, C, D, 1, 4, 0xa4beea44);
- OP (FH, D, A, B, C, 4, 11, 0x4bdecfa9);
- OP (FH, C, D, A, B, 7, 16, 0xf6bb4b60);
- OP (FH, B, C, D, A, 10, 23, 0xbebfbc70);
- OP (FH, A, B, C, D, 13, 4, 0x289b7ec6);
- OP (FH, D, A, B, C, 0, 11, 0xeaa127fa);
- OP (FH, C, D, A, B, 3, 16, 0xd4ef3085);
- OP (FH, B, C, D, A, 6, 23, 0x04881d05);
- OP (FH, A, B, C, D, 9, 4, 0xd9d4d039);
- OP (FH, D, A, B, C, 12, 11, 0xe6db99e5);
- OP (FH, C, D, A, B, 15, 16, 0x1fa27cf8);
- OP (FH, B, C, D, A, 2, 23, 0xc4ac5665);
-
- /* Round 4. */
- OP (FI, A, B, C, D, 0, 6, 0xf4292244);
- OP (FI, D, A, B, C, 7, 10, 0x432aff97);
- OP (FI, C, D, A, B, 14, 15, 0xab9423a7);
- OP (FI, B, C, D, A, 5, 21, 0xfc93a039);
- OP (FI, A, B, C, D, 12, 6, 0x655b59c3);
- OP (FI, D, A, B, C, 3, 10, 0x8f0ccc92);
- OP (FI, C, D, A, B, 10, 15, 0xffeff47d);
- OP (FI, B, C, D, A, 1, 21, 0x85845dd1);
- OP (FI, A, B, C, D, 8, 6, 0x6fa87e4f);
- OP (FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
- OP (FI, C, D, A, B, 6, 15, 0xa3014314);
- OP (FI, B, C, D, A, 13, 21, 0x4e0811a1);
- OP (FI, A, B, C, D, 4, 6, 0xf7537e82);
- OP (FI, D, A, B, C, 11, 10, 0xbd3af235);
- OP (FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
- OP (FI, B, C, D, A, 9, 21, 0xeb86d391);
-
- /* 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;
-}
projects / thirdparty / coreutils.git / commitdiff
