/* Declaration of functions and data types used for MD5 sum computing

   library functions.

   Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2018 Free Software

   Foundation, Inc.

   This file is part of the GNU C Library.

   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 3, 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, see <https://www.gnu.org/licenses/>.  */

#ifndef _MD5_H

#define _MD5_H 1

#include <stdio.h>

#include <stdint.h>

# if HAVE_OPENSSL_MD5

#  include <openssl/md5.h>

# endif

#define MD5_DIGEST_SIZE 16

#define MD5_BLOCK_SIZE 64

#ifndef __GNUC_PREREQ

# if defined __GNUC__ && defined __GNUC_MINOR__

#  define __GNUC_PREREQ(maj, min)                                       \

  ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))

# else

#  define __GNUC_PREREQ(maj, min) 0

# endif

#endif

#ifndef __THROW

# if defined __cplusplus && __GNUC_PREREQ (2,8)

#  define __THROW       throw ()

# else

#  define __THROW

# endif

#endif

#ifndef _LIBC

# define __md5_buffer md5_buffer

# define __md5_finish_ctx md5_finish_ctx

# define __md5_init_ctx md5_init_ctx

# define __md5_process_block md5_process_block

# define __md5_process_bytes md5_process_bytes

# define __md5_read_ctx md5_read_ctx

# define __md5_stream md5_stream

#endif

# ifdef __cplusplus

extern "C" {

# endif

# if HAVE_OPENSSL_MD5

#  define GL_OPENSSL_NAME 5

#  include "gl_openssl.h"

# else

/* Structure to save state of computation between the single steps.  */

struct md5_ctx

{

  uint32_t A;

  uint32_t B;

  uint32_t C;

  uint32_t D;

  uint32_t total[2];

  uint32_t buflen;     /* ≥ 0, ≤ 128 */

  uint32_t buffer[32]; /* 128 bytes; the first buflen bytes are in use */

};

/*

 * The following three functions are build up the low level used in

 * the functions 'md5_stream' and 'md5_buffer'.

 */

/* Initialize structure containing state of computation.

   (RFC 1321, 3.3: Step 3)  */

extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW;

/* 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 necessary that LEN is a multiple of 64!!! */

extern void __md5_process_block (const void *buffer, size_t len,

                                 struct md5_ctx *ctx) __THROW;

/* 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) __THROW;

/* 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.  */

extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW;

/* 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.  */

extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW;

/* 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.  */

extern void *__md5_buffer (const char *buffer, size_t len,

                           void *resblock) __THROW;

# endif

/* Compute MD5 message digest for bytes read from STREAM.

   STREAM is an open file stream.  Regular files are handled more efficiently.

   The contents of STREAM from its current position to its end will be read.

   The case that the last operation on STREAM was an 'ungetc' is not supported.

   The resulting message digest number will be written into the 16 bytes

   beginning at RESBLOCK.  */

extern int __md5_stream (FILE *stream, void *resblock) __THROW;

# ifdef __cplusplus

}

# endif

#endif /* md5.h */

/*

 * Hey Emacs!

 * Local Variables:

 * coding: utf-8

 * End:

 */