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/* IKE modular algorithm handling interface
* Author: JuanJo Ciarlante <jjo-ipsec@mendoza.gov.ar>
*
* 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 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*
* RCSID $Id: ike_alg.h,v 1.3 2004/09/16 23:22:22 as Exp $
*/
#ifndef _IKE_ALG_H
#define _IKE_ALG_H
#include "connections.h"
struct ike_alg {
u_int16_t algo_type;
u_int16_t algo_id;
struct ike_alg *algo_next;
};
struct encrypt_desc {
u_int16_t algo_type;
u_int16_t algo_id;
struct ike_alg *algo_next;
size_t enc_ctxsize;
size_t enc_blocksize;
u_int keydeflen;
u_int keymaxlen;
u_int keyminlen;
void (*do_crypt)(u_int8_t *dat, size_t datasize, u_int8_t *key, size_t key_size, u_int8_t *iv, bool enc);
};
struct hash_desc {
u_int16_t algo_type;
u_int16_t algo_id;
struct ike_alg *algo_next;
size_t hash_ctx_size;
size_t hash_digest_size;
void (*hash_init)(void *ctx);
void (*hash_update)(void *ctx, const u_int8_t *in, size_t datasize);
void (*hash_final)(u_int8_t *out, void *ctx);
};
#define IKE_ALG_ENCRYPT 0
#define IKE_ALG_HASH 1
#define IKE_ALG_MAX IKE_ALG_HASH
extern int ike_alg_add(struct ike_alg *a);
extern struct hash_desc *ike_alg_get_hasher(u_int alg);
extern struct encrypt_desc *ike_alg_get_encrypter(u_int alg);
extern bool ike_alg_enc_present(u_int ealg);
extern bool ike_alg_hash_present(u_int halg);
extern int ike_alg_register_hash(struct hash_desc *a);
extern int ike_alg_register_enc(struct encrypt_desc *e);
extern const struct oakley_group_desc* ike_alg_pfsgroup(struct connection *c
, lset_t policy);
extern struct db_context * ike_alg_db_new(struct alg_info_ike *ai, lset_t policy);
extern void ike_alg_list(void);
extern void ike_alg_show_connection(struct connection *c, const char *instance);
extern bool ike_alg_ok_final(u_int ealg, u_int key_len, u_int aalg, u_int group
, struct alg_info_ike *alg_info_ike);
extern int ike_alg_init(void);
#endif /* _IKE_ALG_H */
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