diff options
Diffstat (limited to 'src/gsm/auth_xor.c')
-rw-r--r-- | src/gsm/auth_xor.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/gsm/auth_xor.c b/src/gsm/auth_xor.c new file mode 100644 index 00000000..2520f096 --- /dev/null +++ b/src/gsm/auth_xor.c @@ -0,0 +1,51 @@ +/* GSM/GPRS/3G authentication core infrastructure */ + +/* (C) 2014 by Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * 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. + * + * 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. + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <osmocom/crypt/auth.h> + +static int xor_gen_vec(struct osmo_auth_vector *vec, + struct osmo_sub_auth_data *aud, + const uint8_t *_rand) +{ + int i; + + for (i=0; i<4; i++) + vec->sres[i] = _rand[i] ^ aud->u.gsm.ki[i]; + for (i=0; i<8; i++) + vec->kc[i] = _rand[i+4] ^ aud->u.gsm.ki[i+4]; + + vec->auth_types = OSMO_AUTH_TYPE_GSM; + + return 0; +} + +static struct osmo_auth_impl xor_alg = { + .algo = OSMO_AUTH_ALG_XOR, + .name = "XOR (libosmogsm built-in)", + .priority = 1000, + .gen_vec = &xor_gen_vec, +}; + +static __attribute__((constructor)) void on_dso_load_xor(void) +{ + osmo_auth_register(&xor_alg); +} |