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/*
* Copyright (C) 2000-2011 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS 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 3 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 this program. If not, see <http://www.gnu.org/licenses/>
*
*/
#ifndef GNUTLS_HASH_INT_H
#define GNUTLS_HASH_INT_H
#include <gnutls_int.h>
#include <gnutls/crypto.h>
#include <crypto-backend.h>
#include <crypto.h>
/* for message digests */
extern int crypto_mac_prio;
extern gnutls_crypto_mac_st _gnutls_mac_ops;
extern int crypto_digest_prio;
extern gnutls_crypto_digest_st _gnutls_digest_ops;
typedef int (*hash_func) (void *handle, const void *text, size_t size);
typedef int (*copy_func) (void **dst_ctx, void *src_ctx);
typedef void (*reset_func) (void *ctx);
typedef int (*output_func) (void *src_ctx, void *digest, size_t digestsize);
typedef void (*deinit_func) (void *handle);
typedef struct
{
gnutls_mac_algorithm_t algorithm;
const void *key;
int keysize;
hash_func hash;
copy_func copy;
reset_func reset;
output_func output;
deinit_func deinit;
void *handle;
} digest_hd_st;
/* basic functions */
int _gnutls_hmac_init (digest_hd_st *, gnutls_mac_algorithm_t algorithm,
const void *key, int keylen);
int _gnutls_hash_get_algo_len (gnutls_digest_algorithm_t algorithm);
#define _gnutls_hmac_get_algo_len _gnutls_hash_get_algo_len
int _gnutls_hmac_fast (gnutls_mac_algorithm_t algorithm, const void *key,
int keylen, const void *text, size_t textlen,
void *digest);
inline static int
_gnutls_hmac (digest_hd_st * handle, const void *text, size_t textlen)
{
if (textlen > 0)
{
return handle->hash (handle->handle, text, textlen);
}
return 0;
}
inline static void
_gnutls_hmac_output (digest_hd_st * handle, void *digest)
{
int maclen;
maclen = _gnutls_hmac_get_algo_len (handle->algorithm);
if (digest != NULL)
{
handle->output (handle->handle, digest, maclen);
}
}
void
_gnutls_hmac_deinit (digest_hd_st * handle, void *digest);
inline static void
_gnutls_hmac_reset (digest_hd_st * handle)
{
if (handle->handle == NULL)
{
return;
}
handle->reset (handle->handle);
}
/* Hash interface */
int _gnutls_hash_init (digest_hd_st *, gnutls_digest_algorithm_t algorithm);
inline static int
_gnutls_hash (digest_hd_st * handle, const void *text, size_t textlen)
{
if (textlen > 0)
{
handle->hash (handle->handle, text, textlen);
}
return 0;
}
/* when the current output is needed without calling deinit
*/
inline static void
_gnutls_hash_output (digest_hd_st * handle, void *digest)
{
size_t maclen;
maclen = _gnutls_hash_get_algo_len (handle->algorithm);
if (digest != NULL)
{
handle->output (handle->handle, digest, maclen);
}
}
inline static void
_gnutls_hash_reset (digest_hd_st * handle)
{
if (handle->handle == NULL)
{
return;
}
handle->reset (handle->handle);
}
void
_gnutls_hash_deinit (digest_hd_st * handle, void *digest);
int
_gnutls_hash_fast (gnutls_digest_algorithm_t algorithm,
const void *text, size_t textlen, void *digest);
/* help functions */
int _gnutls_mac_init_ssl3 (digest_hd_st *, gnutls_mac_algorithm_t algorithm,
void *key, int keylen);
int _gnutls_mac_deinit_ssl3 (digest_hd_st * handle, void *digest);
int _gnutls_mac_output_ssl3 (digest_hd_st * handle, void *digest);
int _gnutls_ssl3_generate_random (void *secret, int secret_len,
void *rnd, int random_len, int bytes,
opaque * ret);
int _gnutls_ssl3_hash_md5 (const void *first, int first_len,
const void *second, int second_len,
int ret_len, opaque * ret);
void _gnutls_mac_reset_ssl3 (digest_hd_st * handle);
int _gnutls_mac_deinit_ssl3_handshake (digest_hd_st * handle, void *digest,
opaque * key, uint32_t key_size);
int _gnutls_hash_copy (digest_hd_st * dst_handle, digest_hd_st * src_handle);
inline static int IS_SHA(gnutls_digest_algorithm_t algo)
{
if (algo == GNUTLS_DIG_SHA1 || algo == GNUTLS_DIG_SHA224 ||
algo == GNUTLS_DIG_SHA256 || algo == GNUTLS_DIG_SHA384 ||
algo == GNUTLS_DIG_SHA512)
return 1;
return 0;
}
#endif /* GNUTLS_HASH_INT_H */
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