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/*
This file is part of GNU libmicrohttpd
Copyright (C) 2022 Evgeny Grin (Karlson2k)
GNU libmicrohttpd is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with GNU libmicrohttpd.
If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file microhttpd/md5_ext.h
* @brief Wrapper declarations for MD5 calculation performed by TLS library
* @author Karlson2k (Evgeny Grin)
*/
#ifndef MHD_MD5_EXT_H
#define MHD_MD5_EXT_H 1
#include "mhd_options.h"
#include <stdint.h>
#ifdef HAVE_STDDEF_H
#include <stddef.h> /* for size_t */
#endif /* HAVE_STDDEF_H */
/**
* Size of MD5 resulting digest in bytes
* This is the final digest size, not intermediate hash.
*/
#define MD5_DIGEST_SIZE (16)
/* Actual declaration is in GnuTLS lib header */
struct hash_hd_st;
/**
* Indicates that struct Md5CtxExt has 'ext_error'
*/
#define MHD_MD5_HAS_EXT_ERROR 1
/**
* MD5 calculation context
*/
struct Md5CtxExt
{
struct hash_hd_st *handle; /**< Hash calculation handle */
int ext_error; /**< Non-zero if external error occurs during init or hashing */
};
/**
* Indicates that MHD_MD5_init_one_time() function is present.
*/
#define MHD_MD5_HAS_INIT_ONE_TIME 1
/**
* Initialise structure for MD5 calculation, allocate resources.
*
* This function must not be called more than one time for @a ctx.
*
* @param ctx the calculation context
*/
void
MHD_MD5_init_one_time (struct Md5CtxExt *ctx);
/**
* MD5 process portion of bytes.
*
* @param ctx the calculation context
* @param data bytes to add to hash
* @param length number of bytes in @a data
*/
void
MHD_MD5_update (struct Md5CtxExt *ctx,
const uint8_t *data,
size_t length);
/**
* Indicates that MHD_MD5_finish_reset() function is available
*/
#define MHD_MD5_HAS_FINISH_RESET 1
/**
* Finalise MD5 calculation, return digest, reset hash calculation.
*
* @param ctx the calculation context
* @param[out] digest set to the hash, must be #MD5_DIGEST_SIZE bytes
*/
void
MHD_MD5_finish_reset (struct Md5CtxExt *ctx,
uint8_t digest[MD5_DIGEST_SIZE]);
/**
* Indicates that MHD_MD5_deinit() function is present
*/
#define MHD_MD5_HAS_DEINIT 1
/**
* Free allocated resources.
*
* @param ctx the calculation context
*/
void
MHD_MD5_deinit (struct Md5CtxExt *ctx);
#endif /* MHD_MD5_EXT_H */
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