diff options
| -rw-r--r-- | src/gsm/milenage/milenage.c | 15 | ||||
| -rw-r--r-- | src/gsm/milenage/milenage.h | 2 | ||||
| -rw-r--r-- | tests/auth/milenage_test.c | 20 |
3 files changed, 37 insertions, 0 deletions
diff --git a/src/gsm/milenage/milenage.c b/src/gsm/milenage/milenage.c index cc4e95c5..b43f986a 100644 --- a/src/gsm/milenage/milenage.c +++ b/src/gsm/milenage/milenage.c @@ -327,3 +327,18 @@ int milenage_check(const u8 *opc, const u8 *k, const u8 *sqn, const u8 *_rand, return 0; } + +int milenage_opc_gen(u8 *opc, const u8 *k, const u8 *op) +{ + int i; + + /* Encrypt OP using K */ + if (aes_128_encrypt_block(k, op, opc)) + return -1; + + /* XOR the resulting Ek(OP) with OP */ + for (i = 0; i < 16; i++) + opc[i] = opc[i] ^ op[i]; + + return 0; +} diff --git a/src/gsm/milenage/milenage.h b/src/gsm/milenage/milenage.h index d5054d6d..a91e946a 100644 --- a/src/gsm/milenage/milenage.h +++ b/src/gsm/milenage/milenage.h @@ -30,4 +30,6 @@ int milenage_f1(const u8 *opc, const u8 *k, const u8 *_rand, int milenage_f2345(const u8 *opc, const u8 *k, const u8 *_rand, u8 *res, u8 *ck, u8 *ik, u8 *ak, u8 *akstar); +int milenage_opc_gen(u8 *opc, const u8 *k, const u8 *op); + #endif /* MILENAGE_H */ diff --git a/tests/auth/milenage_test.c b/tests/auth/milenage_test.c index da7c800a..7c996f02 100644 --- a/tests/auth/milenage_test.c +++ b/tests/auth/milenage_test.c @@ -37,6 +37,24 @@ static struct osmo_sub_auth_data test_aud = { }, }; +static int opc_test(const struct osmo_sub_auth_data *aud) +{ + int rc; + uint8_t opc[16]; +#if 0 + const uint8_t op[16] = { 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }; +#else + const uint8_t op[16] = { 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0 }; +#endif + + rc = milenage_opc_gen(opc, aud->u.umts.k, op); + + printf("OP:\t%s\n", osmo_hexdump(op, sizeof(op))); + printf("OPC:\t%s\n", osmo_hexdump(opc, sizeof(opc))); + return rc; +} + int main(int argc, char **argv) { struct osmo_auth_vector _vec; @@ -73,6 +91,8 @@ int main(int argc, char **argv) printf("AUTS success: SEQ.MS = %lu\n", test_aud.u.umts.sqn); } + opc_test(&test_aud); + exit(0); } |