diff options
Diffstat (limited to 'src/gsm/auth_xor.c')
| -rw-r--r-- | src/gsm/auth_xor.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/src/gsm/auth_xor.c b/src/gsm/auth_xor.c index 36e006e6..a506a03d 100644 --- a/src/gsm/auth_xor.c +++ b/src/gsm/auth_xor.c @@ -20,10 +20,6 @@ * 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 <string.h> @@ -47,19 +43,23 @@ static void xor(uint8_t *out, const uint8_t *a, const uint8_t *b, size_t len) /* 3GPP TS 34.108, section 8.1.2.1 */ static int xor_gen_vec(struct osmo_auth_vector *vec, - struct osmo_sub_auth_data *aud, + struct osmo_sub_auth_data2 *aud, const uint8_t *_rand) { uint8_t xdout[16], cdout[8]; uint8_t ak[6], xmac[8]; int i; + OSMO_ASSERT(aud->algo == OSMO_AUTH_ALG_XOR_3G); + /* Step 1: xdout = (ki or k) ^ rand */ if (aud->type == OSMO_AUTH_TYPE_GSM) xor(xdout, aud->u.gsm.ki, _rand, sizeof(xdout)); - else if (aud->type == OSMO_AUTH_TYPE_UMTS) + else if (aud->type == OSMO_AUTH_TYPE_UMTS) { + if (aud->u.umts.k_len != 16) + return -EINVAL; xor(xdout, aud->u.umts.k, _rand, sizeof(xdout)); - else + } else return -ENOTSUP; /** @@ -129,7 +129,7 @@ static int xor_gen_vec(struct osmo_auth_vector *vec, /* 3GPP TS 34.108, section 8.1.2.2 */ static int xor_gen_vec_auts(struct osmo_auth_vector *vec, - struct osmo_sub_auth_data *aud, + struct osmo_sub_auth_data2 *aud, const uint8_t *auts, const uint8_t *rand_auts, const uint8_t *_rand) @@ -138,12 +138,16 @@ static int xor_gen_vec_auts(struct osmo_auth_vector *vec, uint8_t ak[6], xmac[8]; uint8_t sqnms[6]; + OSMO_ASSERT(aud->algo == OSMO_AUTH_ALG_XOR_3G); + /* Step 1: xdout = (ki or k) ^ rand */ if (aud->type == OSMO_AUTH_TYPE_GSM) xor(xdout, aud->u.gsm.ki, _rand, sizeof(xdout)); - else if (aud->type == OSMO_AUTH_TYPE_UMTS) + else if (aud->type == OSMO_AUTH_TYPE_UMTS) { + if (aud->u.umts.k_len != 16) + return -EINVAL; xor(xdout, aud->u.umts.k, _rand, sizeof(xdout)); - else + } else return -ENOTSUP; /* Step 2: ak = xdout[2-8] */ @@ -172,8 +176,8 @@ static int xor_gen_vec_auts(struct osmo_auth_vector *vec, } static struct osmo_auth_impl xor_alg = { - .algo = OSMO_AUTH_ALG_XOR, - .name = "XOR (libosmogsm built-in)", + .algo = OSMO_AUTH_ALG_XOR_3G, + .name = "XOR-3G (libosmogsm built-in)", .priority = 1000, .gen_vec = &xor_gen_vec, .gen_vec_auts = &xor_gen_vec_auts, |