/*
 *      Copyright (C) 2000 Nikos Mavroyanopoulos
 *
 * This file is part of GNUTLS.
 *
 * GNUTLS 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 of the License, or
 * (at your option) any later version.
 *
 * GNUTLS 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
 */

#include "gnutls_auth.h"

/* functions for version */

gnutls_protocol_version _gnutls_version_lowest( gnutls_session session);
gnutls_protocol_version _gnutls_version_max( gnutls_session session);
int _gnutls_version_priority(gnutls_session session, gnutls_protocol_version version);
int _gnutls_version_is_supported(gnutls_session session, const gnutls_protocol_version version);
int _gnutls_version_get_major( gnutls_protocol_version ver);
int _gnutls_version_get_minor( gnutls_protocol_version ver);
gnutls_protocol_version _gnutls_version_get( int major, int minor);

/* functions for macs */
int   _gnutls_mac_get_digest_size(gnutls_mac_algorithm algorithm);
const char* gnutls_mac_get_name(gnutls_mac_algorithm algorithm);
int   _gnutls_mac_is_ok(gnutls_mac_algorithm algorithm);
int   _gnutls_mac_priority(gnutls_session session, gnutls_mac_algorithm algorithm);

/* functions for cipher suites */
int   _gnutls_supported_ciphersuites(gnutls_session session, GNUTLS_CipherSuite **ciphers);
int   _gnutls_supported_ciphersuites_sorted(gnutls_session session, GNUTLS_CipherSuite **ciphers);
int   _gnutls_supported_compression_methods(gnutls_session session, uint8 **comp);

const char* _gnutls_cipher_suite_get_name(GNUTLS_CipherSuite algorithm);
gnutls_cipher_algorithm _gnutls_cipher_suite_get_cipher_algo(const GNUTLS_CipherSuite algorithm);
gnutls_kx_algorithm _gnutls_cipher_suite_get_kx_algo(const GNUTLS_CipherSuite algorithm);
gnutls_mac_algorithm _gnutls_cipher_suite_get_mac_algo(const GNUTLS_CipherSuite algorithm);
gnutls_protocol_version _gnutls_cipher_suite_get_version(const GNUTLS_CipherSuite algorithm);
GNUTLS_CipherSuite  _gnutls_cipher_suite_get_suite_name(GNUTLS_CipherSuite algorithm);

/* functions for ciphers */
int _gnutls_cipher_priority(gnutls_session session, gnutls_cipher_algorithm algorithm);
int _gnutls_cipher_get_block_size(gnutls_cipher_algorithm algorithm);
int _gnutls_cipher_is_block(gnutls_cipher_algorithm algorithm);
int _gnutls_cipher_is_ok(gnutls_cipher_algorithm algorithm);
size_t gnutls_cipher_get_key_size(gnutls_cipher_algorithm algorithm);
int _gnutls_cipher_get_iv_size(gnutls_cipher_algorithm algorithm);
int _gnutls_cipher_get_export_flag(gnutls_cipher_algorithm algorithm);
const char *gnutls_cipher_get_name(gnutls_cipher_algorithm algorithm);

/* functions for key exchange */
int _gnutls_kx_priority(gnutls_session session, gnutls_kx_algorithm algorithm);

MOD_AUTH_STRUCT * _gnutls_kx_auth_struct(gnutls_kx_algorithm algorithm);
const char *gnutls_kx_get_name(gnutls_kx_algorithm algorithm);
int _gnutls_kx_is_ok(gnutls_kx_algorithm algorithm);

/* functions for compression */
int _gnutls_compression_priority(gnutls_session session, gnutls_compression_method algorithm);
int _gnutls_compression_is_ok(gnutls_compression_method algorithm);
int _gnutls_compression_get_num(gnutls_compression_method algorithm);
gnutls_compression_method _gnutls_compression_get_id(int num);
const char *gnutls_compression_get_name(gnutls_compression_method algorithm);

int _gnutls_compression_get_mem_level(gnutls_compression_method algorithm);
int _gnutls_compression_get_comp_level(gnutls_compression_method algorithm);
int _gnutls_compression_get_wbits(gnutls_compression_method algorithm);

/* Type to KX mappings */
gnutls_kx_algorithm _gnutls_map_kx_get_kx(gnutls_credentials_type type, int server);
gnutls_credentials_type _gnutls_map_kx_get_cred(gnutls_kx_algorithm algorithm, int server);

/* KX to PK mapping */
gnutls_pk_algorithm _gnutls_map_pk_get_pk(gnutls_kx_algorithm kx_algorithm);

enum encipher_type { CIPHER_ENCRYPT=0, CIPHER_SIGN=1, CIPHER_IGN };

enum encipher_type _gnutls_kx_encipher_type(gnutls_kx_algorithm algorithm);

struct gnutls_kx_algo_entry {
	const char *name;
	gnutls_kx_algorithm algorithm;
	MOD_AUTH_STRUCT *auth_struct;
};
typedef struct gnutls_kx_algo_entry gnutls_kx_algo_entry;

struct gnutls_compression_entry {
	const char *name;
	gnutls_compression_method id;
	int num; /* the number reserved in TLS for the specific compression method */

	/* used in zlib compressor */
	int window_bits;
	int mem_level;
	int comp_level;
};
typedef struct gnutls_compression_entry gnutls_compression_entry;