84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
/* Declaration of functions and data types used for MD5 sum computing
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library functions.
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Copyright (C) 1995,1996,1997,1999,2000,2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _MD5_H
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#define _MD5_H 1
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#include <stdint.h>
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typedef uint32_t md5_uint32;
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typedef uintptr_t md5_uintptr;
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/* Structure to save state of computation between the single steps. */
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struct md5_ctx
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{
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md5_uint32 A;
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md5_uint32 B;
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md5_uint32 C;
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md5_uint32 D;
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md5_uint32 total[2];
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md5_uint32 buflen;
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char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32))));
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};
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/*
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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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*/
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/* Initialize structure containing state of computation.
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(RFC 1321, 3.3: Step 3) */
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extern 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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initialization function update the context for the next LEN bytes
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starting at BUFFER.
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It is necessary that LEN is a multiple of 64!!! */
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extern void md5_process_block __P ((const void *buffer, size_t len,
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struct md5_ctx *ctx));
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/* Starting with the result of former calls of this function (or the
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initialization function update the context for the next LEN bytes
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starting at BUFFER.
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It is NOT required that LEN is a multiple of 64. */
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extern void md5_process_bytes __P ((const void *buffer, size_t len,
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struct md5_ctx *ctx));
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/* Process the remaining bytes in the buffer and put result from CTX
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in first 16 bytes following RESBUF. The result is always in little
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endian byte order, so that a byte-wise output yields to the wanted
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ASCII representation of the message digest.
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IMPORTANT: On some systems it is required that RESBUF is correctly
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aligned for a 32 bits value. */
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extern void *md5_finish_ctx __P ((struct md5_ctx *ctx, void *resbuf));
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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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IMPORTANT: On some systems it is required that RESBUF is correctly
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aligned for a 32 bits value. */
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extern void *md5_read_ctx __P ((const struct md5_ctx *ctx, void *resbuf));
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#endif /* md5.h */
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