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/* md5.h - Declaration of functions and data types used for MD5 sum
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computing library functions.
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Copyright (C) 1995 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#if defined HAVE_LIMITS_H || _LIBC
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/* The following contortions are an attempt to use the C preprocessor
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to determine an unsigned integral type that is 32 bits wide. An
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alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
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doing that would require that the configure script compile and *run*
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the resulting executable. Locally running cross-compiled executables
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is usually not possible. */
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#if defined __STDC__ && __STDC__
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# define UINT_MAX_32_BITS 4294967295U
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# define UINT_MAX_32_BITS 0xFFFFFFFF
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/* If UINT_MAX isn't defined, assume it's a 32-bit type.
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This should be valid for all systems GNU cares about because
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that doesn't include 16-bit systems, and only modern systems
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(that certainly have <limits.h>) have 64+-bit integral types. */
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# define UINT_MAX UINT_MAX_32_BITS
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#if UINT_MAX == UINT_MAX_32_BITS
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typedef unsigned int md5_uint32;
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# if USHRT_MAX == UINT_MAX_32_BITS
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typedef unsigned short md5_uint32;
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# if ULONG_MAX == UINT_MAX_32_BITS
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typedef unsigned long md5_uint32;
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/* The following line is intended to evoke an error.
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Using #error is not portable enough. */
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"Cannot determine unsigned 32-bit data type."
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#if defined (__STDC__) && __STDC__
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/* Structure to save state of computation between the single steps. */
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* The following three functions are build up the low level used in
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* the functions `md5_stream' and `md5_buffer'.
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/* Initialize structure containing state of computation.
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(RFC 1321, 3.3: Step 3) */
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void md5_init_ctx __P ((struct md5_ctx *ctx));
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/* Starting with the result of former calls of this function (or the
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initialzation function update the context for the next LEN bytes
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It is necessary that LEN is a multiple of 64!!! */
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void md5_process_block __P ((const void *buffer, size_t len,
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struct md5_ctx *ctx));
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/* Put result from CTX in first 16 bytes following RESBUF. The result is
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always in little endian byte order, so that a byte-wise output yields
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to the wanted ASCII representation of the message digest. */
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void *md5_read_ctx __P ((const struct md5_ctx *ctx, void *resbuf));
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/* Compute MD5 message digest for bytes read from STREAM. The
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resulting message digest number will be written into the 16 bytes
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beginning at RESBLOCK. */
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int md5_stream __P ((FILE *stream, void *resblock));
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/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
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result is always in little endian byte order, so that a byte-wise
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output yields to the wanted ASCII representation of the message
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void *md5_buffer __P ((const char *buffer, size_t len, void *resblock));