/* md5.c - Functions to compute MD5 message digest of files or memory blocks
-Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+ according to the definition of MD5 in RFC 1321 from April 1992.
+ Copyright (C) 1995, 1996, 2001 Free Software Foundation, Inc.
+ NOTE: The canonical source of this file is maintained with the GNU C
+ Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu.
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+ 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.
-The GNU C Library 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
-Library General Public License for more details.
+ 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 Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+ 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>. */
+/* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "md5.h"
+#include "unlocked-io.h"
#ifdef _LIBC
# include <endian.h>
ctx->buflen = 0;
}
-/* Put result from CTX in first 16 bytes following RESBUF. The result must
- be in little endian byte order. */
+/* Put result from CTX in first 16 bytes following RESBUF. The result
+ must be in little endian byte order.
+
+ IMPORTANT: On some systems it is required that RESBUF is correctly
+ aligned for a 32 bits value. */
void *
md5_read_ctx (ctx, resbuf)
const struct md5_ctx *ctx;
}
/* Process the remaining bytes in the internal buffer and the usual
- prolog according to the standard and write the result to RESBUF. */
+ 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. */
void *
md5_finish_ctx (ctx, resbuf)
struct md5_ctx *ctx;
{ \
a += FF (b, c, d) + (*cwp++ = SWAP (*words)) + T; \
++words; \
- CYCLIC (a, s); \
+ a = rol (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
+ T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64, or
+ perl -e 'foreach(1..64){printf "0x%08x\n", int (4294967296 * abs (sin $_))}'
*/
/* Round 1. */
do \
{ \
a += f (b, c, d) + correct_words[k] + T; \
- CYCLIC (a, s); \
+ a = rol (a, s); \
a += b; \
} \
while (0)
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