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#ifndef _OSMOCRYPTO_AUTH_H
#define _OSMOCRYPTO_AUTH_H
#include <stdint.h>
#include <osmocom/core/linuxlist.h>
/*! \brief Authentication Type */
enum osmo_sub_auth_type {
OSMO_AUTH_TYPE_NONE = 0x00,
OSMO_AUTH_TYPE_GSM = 0x01,
OSMO_AUTH_TYPE_UMTS = 0x02,
};
/*! \brief Authentication Algorithm */
enum osmo_auth_algo {
OSMO_AUTH_ALG_NONE,
OSMO_AUTH_ALG_COMP128v1,
OSMO_AUTH_ALG_COMP128v2,
OSMO_AUTH_ALG_COMP128v3,
OSMO_AUTH_ALG_XOR,
OSMO_AUTH_ALG_MILENAGE,
_OSMO_AUTH_ALG_NUM,
};
/*! \brief permanent (secret) subscriber auth data */
struct osmo_sub_auth_data {
enum osmo_sub_auth_type type;
enum osmo_auth_algo algo;
union {
struct {
uint8_t opc[16];
uint8_t k[16];
uint8_t amf[2];
uint64_t sqn;
} umts;
struct {
uint8_t ki[16];
} gsm;
};
};
/* data structure describing a computed auth vector, generated by AuC */
struct osmo_auth_vector {
uint8_t rand[16];
uint8_t autn[16];
uint8_t ck[16];
uint8_t ik[16];
uint8_t res[16];
uint8_t res_len;
uint8_t kc[8];
uint8_t sres[4];
uint32_t auth_types; /*!< bitmask of OSMO_AUTH_TYPE_* */
};
/* \brief An implementation of an authentication algorithm */
struct osmo_auth_impl {
struct llist_head list;
enum osmo_auth_algo algo;
const char *name;
unsigned int priority;
int (*gen_vec)(struct osmo_auth_vector *vec,
struct osmo_sub_auth_data *aud,
const uint8_t *_rand);
int (*gen_vec_auts)(struct osmo_auth_vector *vec,
struct osmo_sub_auth_data *aud,
const uint8_t *rand_auts, const uint8_t *auts,
const uint8_t *_rand);
};
int osmo_auth_gen_vec(struct osmo_auth_vector *vec,
struct osmo_sub_auth_data *aud, const uint8_t *_rand);
int osmo_auth_gen_vec_auts(struct osmo_auth_vector *vec,
struct osmo_sub_auth_data *aud,
const uint8_t *rand_auts, const uint8_t *auts,
const uint8_t *_rand);
int osmo_auth_register(struct osmo_auth_impl *impl);
int osmo_auth_load(const char *path);
int osmo_auth_supported(enum osmo_auth_algo algo);
#endif /* _OSMOCRYPTO_AUTH_H */
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