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/* Algorithm info parsing and creation functions
* 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.
*/
#ifndef ALG_INFO_H
#define ALG_INFO_H
struct esp_info {
u_int8_t transid; /* ESP transform */
u_int16_t auth; /* AUTH */
size_t enckeylen; /* keylength for ESP transform */
size_t authkeylen; /* keylength for AUTH */
u_int8_t encryptalg; /* normally encryptalg=transid */
u_int8_t authalg; /* normally authalg=auth+1 */
};
struct ike_info {
u_int16_t ike_ealg; /* high 16 bit nums for reserved */
u_int8_t ike_halg;
size_t ike_eklen;
size_t ike_hklen;
u_int16_t ike_modp;
};
#define ALG_INFO_COMMON \
int alg_info_cnt; \
int ref_cnt; \
unsigned alg_info_flags; \
unsigned alg_info_protoid
struct alg_info {
ALG_INFO_COMMON;
};
struct alg_info_esp {
ALG_INFO_COMMON;
struct esp_info esp[64];
int esp_pfsgroup;
};
struct alg_info_ike {
ALG_INFO_COMMON;
struct ike_info ike[64];
};
#define esp_ealg_id transid
#define esp_aalg_id auth
#define esp_ealg_keylen enckeylen /* bits */
#define esp_aalg_keylen authkeylen /* bits */
/* alg_info_flags bits */
#define ALG_INFO_F_STRICT 0x01
extern int alg_info_esp_aa2sadb(int auth);
extern int alg_info_esp_sadb2aa(int sadb_aalg);
extern void alg_info_free(struct alg_info *alg_info);
extern void alg_info_addref(struct alg_info *alg_info);
extern void alg_info_delref(struct alg_info **alg_info);
extern struct alg_info_esp* alg_info_esp_create_from_str(char *alg_str);
extern struct alg_info_ike* alg_info_ike_create_from_str(char *alg_str);
extern int alg_info_parse(const char *str);
extern int alg_info_snprint(char *buf, int buflen, struct alg_info *alg_info);
extern int alg_info_snprint_esp(char *buf, int buflen
, struct alg_info_esp *alg_info);
extern int alg_info_snprint_ike(char *buf, int buflen
, struct alg_info_ike *alg_info);
#define ALG_INFO_ESP_FOREACH(ai, ai_esp, i) \
for (i=(ai)->alg_info_cnt,ai_esp=(ai)->esp; i--; ai_esp++)
#define ALG_INFO_IKE_FOREACH(ai, ai_ike, i) \
for (i=(ai)->alg_info_cnt,ai_ike=(ai)->ike; i--; ai_ike++)
#endif /* ALG_INFO_H */
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