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/*
* Declaration of functions and data types used for MD5 sum computing
* library functions. Copyright (C) 1995, 1996 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.
*
* 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.
*
* 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 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.
*
* $Id$
*/
/*
* NOTE: during quick performance tests on a sun ultra and an alpha
* 255 300, the md5 libraries performed upwards of 3mb/sec. That
* included disk i/o on bobcat and panther.
*/
#ifndef __MD5_H__
#define __MD5_H__
#ifdef __cplusplus
extern "C" {
#endif
/*
* Size of a standard MD5 signature in bytes. This definition is for
* external programs only. The MD5 routines themselves reference the
* signature as 4 unsigned 32-bit integers.
*/
#define MD5_SIZE 16
/*
* NOTE: the following is assumed to generate a 32-bit unsigned data
* type.
*/
typedef unsigned int md5_uint32;
#define MAX_MD5_UINT32 ((md5_uint32)4294967295U)
/*
* The MD5 algorithm works on blocks of characters of 64 bytes. This
* is an internal value only and is not necessary for external use.
*/
#define MD5_BLOCK_SIZE 64
/*
* Structure to save state of computation between the single steps.
*/
typedef struct
{
md5_uint32 md_A; /* accumulater 1 */
md5_uint32 md_B; /* accumulater 2 */
md5_uint32 md_C; /* accumulater 3 */
md5_uint32 md_D; /* accumulater 4 */
md5_uint32 md_total[2]; /* totaling storage */
md5_uint32 md_buf_len; /* length of the storage buffer */
char md_buffer[MD5_BLOCK_SIZE * 2]; /* character storage buffer */
} md5_t;
/*<<<<<<<<<< The below prototypes are auto-generated by fillproto */
/*
* md5_init
*
* DESCRIPTION:
*
* Initialize structure containing state of MD5 computation. (RFC 1321,
* 3.3: Step 3). This is for progressive MD5 calculations only. If
* you have the complete string available, md5_buffer should be used.
* md5_process should be called for each bunch of bytes and after the
* last process call, md5_finish should be called to get the
* signature.
*
* RETURNS:
*
* None.
*
* ARGUMENTS:
*
* md5_p - Pointer to md5 structure that we are initializing.
*/
extern
void md5_init(md5_t *md5_p);
/*
* md5_process
*
* DESCRIPTION:
*
* This function is used to progressively calculate a MD5 signature some
* number of bytes at a time. If you have the complete string
* available, md5_buffer should be used. The MD5 structure should
* have been initialized with md5_init and after the last process
* call, md5_finish should be called to get the results.
*
* RETURNS:
*
* None.
*
* ARGUMENTS:
*
* md5_p - Pointer to MD5 structure which we are progressively updating.
*
* buffer - A buffer of bytes whose MD5 signature we are calculating.
*
* buf_len - The length of the buffer.
*/
extern
void md5_process(md5_t *md5_p, const void *buffer,
const unsigned int buf_len);
/*
* md5_finish
*
* DESCRIPTION:
*
* Finish a progressing MD5 calculation and copy the resulting MD5
* signature into the result buffer which should be 16 bytes
* (MD5_SIZE). After this call, the MD5 structure is invalid.
*
* RETURNS:
*
* None.
*
* ARGUMENTS:
*
* md5_p - Pointer to MD5 structure which we are finishing.
*
* signature - A 16 byte buffer that will contain the MD5 signature.
*/
extern
void md5_finish(md5_t *md5_p, void *signature);
/*
* md5_buffer
*
* DESCRIPTION:
*
* This function is used to calculate a MD5 signature for a buffer of
* bytes. If you only have part of a buffer that you want to process
* then md5_init, md5_process, and md5_finish should be used.
*
* RETURNS:
*
* None.
*
* ARGUMENTS:
*
* buffer - A buffer of bytes whose MD5 signature we are calculating.
*
* buf_len - The length of the buffer.
*
* signature - A 16 byte buffer that will contain the MD5 signature.
*/
extern
void md5_buffer(const char *buffer, const unsigned int buf_len,
void *signature);
/*
* md5_sig_to_string
*
* DESCRIPTION:
*
* Convert a MD5 signature in a 16 byte buffer into a hexadecimal string
* representation.
*
* RETURNS:
*
* None.
*
* ARGUMENTS:
*
* signature - a 16 byte buffer that contains the MD5 signature.
*
* str - a string of charactes which should be at least 33 bytes long (2
* characters per MD5 byte and 1 for the \0).
*
* str_len - the length of the string.
*/
extern
void md5_sig_to_string(void *signature, char *str, const int str_len);
/*
* md5_sig_from_string
*
* DESCRIPTION:
*
* Convert a MD5 signature from a hexadecimal string representation into
* a 16 byte buffer.
*
* RETURNS:
*
* None.
*
* ARGUMENTS:
*
* signature - A 16 byte buffer that will contain the MD5 signature.
*
* str - A string of charactes which _must_ be at least 32 bytes long (2
* characters per MD5 byte).
*/
extern
void md5_sig_from_string(void *signature, const char *str);
/*<<<<<<<<<< This is end of the auto-generated output from fillproto. */
#ifdef __cplusplus
}
#endif
#endif /* ! __MD5_H__ */
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