/* md5.h - Declaration of functions and data types used for MD5 sum
computing library functions.
- Copyright (C) 1995 Free 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.
+ Copyright (C) 1995, 1996, 1999, 2000, 2003, 2004 Free Software
+ Foundation, Inc.
-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.
+ 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.
-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. */
+ 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.
-#ifndef _MD5_H
-#define _MD5_H
+ 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.
-#include <stdio.h>
+ 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. */
-#if defined HAVE_LIMITS_H || _LIBC
-# include <limits.h>
-#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
+#ifndef _MD5_H
+#define _MD5_H 1
-/* 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. */
+#include <stdio.h>
-#ifndef UINT_MAX
-# define UINT_MAX UINT_MAX_32_BITS
+#if HAVE_INTTYPES_H
+# include <inttypes.h>
#endif
-
-#if UINT_MAX == UINT_MAX_32_BITS
- typedef unsigned int md5_uint32;
-#else
-# if USHRT_MAX == UINT_MAX_32_BITS
- typedef unsigned short md5_uint32;
-# else
-# if ULONG_MAX == UINT_MAX_32_BITS
- typedef unsigned long md5_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
+#if HAVE_STDINT_H || _LIBC
+# include <stdint.h>
#endif
-#undef PARAMS
-#if defined (__STDC__) && __STDC__
-# define PARAMS(x) x
-#else
-# define PARAMS(x) ()
-#endif
+typedef uint32_t md5_uint32;
/* Structure to save state of computation between the single steps. */
struct md5_ctx
md5_uint32 B;
md5_uint32 C;
md5_uint32 D;
+
+ md5_uint32 total[2];
+ md5_uint32 buflen;
+ char buffer[128];
};
/*
/* Initialize structure containing state of computation.
(RFC 1321, 3.3: Step 3) */
-void md5_init_ctx PARAMS ((struct md5_ctx *ctx));
+extern void md5_init_ctx (struct md5_ctx *ctx);
/* Starting with the result of former calls of this function (or the
- initialzation function update the context for the next LEN bytes
+ initialization function update the context for the next LEN bytes
starting at BUFFER.
It is necessary that LEN is a multiple of 64!!! */
-void md5_process_block PARAMS ((const void *buffer, size_t len,
- struct md5_ctx *ctx));
+extern void md5_process_block (const void *buffer, size_t len,
+ struct md5_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is NOT required that LEN is a multiple of 64. */
+extern void md5_process_bytes (const void *buffer, size_t len,
+ struct md5_ctx *ctx);
+
+/* Process the remaining bytes in the buffer and put result from CTX
+ in first 16 bytes following RESBUF. The result is always in little
+ endian byte order, so that a byte-wise output yields to the wanted
+ ASCII representation of the message digest.
+
+ IMPORTANT: On some systems it is required that RESBUF be correctly
+ aligned for a 32 bits value. */
+extern void *md5_finish_ctx (struct md5_ctx *ctx, void *resbuf);
+
/* Put result from CTX in first 16 bytes following RESBUF. The result is
always in little endian byte order, so that a byte-wise output yields
- to the wanted ASCII representation of the message digest. */
-void *md5_read_ctx PARAMS ((const struct md5_ctx *ctx, void *resbuf));
+ to the wanted ASCII representation of the message digest.
+
+ IMPORTANT: On some systems it is required that RESBUF is correctly
+ aligned for a 32 bits value. */
+extern void *md5_read_ctx (const struct md5_ctx *ctx, void *resbuf);
/* Compute MD5 message digest for bytes read from STREAM. The
resulting message digest number will be written into the 16 bytes
beginning at RESBLOCK. */
-int md5_stream PARAMS ((FILE *stream, void *resblock));
+extern int md5_stream (FILE *stream, void *resblock);
/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
result is always in little endian byte order, so that a byte-wise
output yields to the wanted ASCII representation of the message
digest. */
-void *md5_buffer PARAMS ((const char *buffer, size_t len, void *resblock));
+extern void *md5_buffer (const char *buffer, size_t len, void *resblock);
+
+#define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) )
#endif
projects / gnulib.git / blobdiff