Sponsored-by: On-Waves ehf
---
 openbsc/tests/oap/oap_test.c  | 193 +++++++++++++++++++++++++++++++++++++++++-
 openbsc/tests/oap/oap_test.ok |   7 +-
 2 files changed, 195 insertions(+), 5 deletions(-)

diff --git a/openbsc/tests/oap/oap_test.c b/openbsc/tests/oap/oap_test.c
index b03c8dc..9a2063b 100644
--- a/openbsc/tests/oap/oap_test.c
+++ b/openbsc/tests/oap/oap_test.c
@@ -27,10 +27,195 @@

 #include <stdio.h>

-
-static void test_oap(void)
+static void test_oap_api(void)
 {
-       printf("not implemented\n");
+       printf("Testing OAP API\n  - Config parsing\n");
+
+       struct oap_config _config;
+       struct oap_config *config = &_config;
+
+       struct oap_state _state;
+       struct oap_state *state = &_state;
+
+       memset(config, 0, sizeof(*config));
+       memset(state, 0, sizeof(*state));
+
+       OSMO_ASSERT(osmo_hexparse("0102030405060708090a0b0c0d0e0f10", 
config->secret_k, 16) == 16);
+       OSMO_ASSERT(osmo_hexparse("1112131415161718191a1b1c1d1e1f20", 
config->secret_opc, 16) == 16);
+
+       /* make sure filling with zeros means uninitialized */
+       OSMO_ASSERT(state->state == OAP_UNINITIALIZED);
+
+       /* invalid client_id and shared secret */
+       config->client_id = 0;
+       config->secret_k_present = 0;
+       config->secret_opc_present = 0;
+       OSMO_ASSERT( oap_init(config, state) == 0 );
+       OSMO_ASSERT(state->state == OAP_DISABLED);
+
+       /* reset state */
+       memset(state, 0, sizeof(*state));
+
+       /* only client_id is invalid */
+       config->client_id = 0;
+       config->secret_k_present = 1;
+       config->secret_opc_present = 1;
+       OSMO_ASSERT( oap_init(config, state) == 0 );
+       OSMO_ASSERT(state->state == OAP_DISABLED);
+
+       memset(state, 0, sizeof(*state));
+
+       /* valid id, but omitted shared_secret (1/2) */
+       config->client_id = 12345;
+       config->secret_k_present = 0;
+       config->secret_opc_present = 1;
+       OSMO_ASSERT( oap_init(config, state) == 0 );
+       OSMO_ASSERT(state->state == OAP_DISABLED);
+
+       memset(state, 0, sizeof(*state));
+
+       /* valid id, but omitted shared_secret (2/2) */
+       config->client_id = 12345;
+       config->secret_k_present = 1;
+       config->secret_opc_present = 0;
+       OSMO_ASSERT( oap_init(config, state) == 0 );
+       OSMO_ASSERT(state->state == OAP_DISABLED);
+
+       memset(state, 0, sizeof(*state));
+
+
+       /* mint configuration */
+       config->client_id = 12345;
+       config->secret_k_present = 1;
+       config->secret_opc_present = 1;
+       /*config->secret_* buffers are still set from the top */
+       OSMO_ASSERT( oap_init(config, state) == 0 );
+       OSMO_ASSERT(state->state == OAP_INITIALIZED);
+
+       printf("  - AUTN failures\n");
+
+       struct oap_message oap_rx;
+       struct oap_message oap_tx;
+       struct msgb *msg_rx;
+       struct msgb *msg_tx;
+
+       memset(&oap_rx, 0, sizeof(oap_rx));
+
+       /* Missing challenge data */
+       oap_rx.message_type = OAP_MSGT_CHALLENGE_REQUEST;
+       oap_rx.rand_present = 0;
+       oap_rx.autn_present = 0;
+       msg_rx = oap_encoded(&oap_rx);
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == -2);
+       msgb_free(msg_rx);
+       OSMO_ASSERT(!msg_tx);
+
+       /* AUTN missing */
+       osmo_hexparse("0102030405060708090a0b0c0d0e0f10",
+                     oap_rx.rand, 16);
+       oap_rx.rand_present = 1;
+       msg_rx = oap_encoded(&oap_rx);
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == -2);
+       msgb_free(msg_rx);
+       OSMO_ASSERT(!msg_tx);
+
+       /* RAND missing */
+       oap_rx.rand_present = 0;
+       osmo_hexparse("cec4e3848a33000086781158ca40f136",
+                     oap_rx.autn, 16);
+       oap_rx.autn_present = 1;
+       msg_rx = oap_encoded(&oap_rx);
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == -2);
+       msgb_free(msg_rx);
+       OSMO_ASSERT(!msg_tx);
+
+       /* wrong autn (by one bit) */
+       osmo_hexparse("0102030405060708090a0b0c0d0e0f10",
+                     oap_rx.rand, 16);
+       osmo_hexparse("dec4e3848a33000086781158ca40f136",
+                     oap_rx.autn, 16);
+       oap_rx.rand_present = 1;
+       oap_rx.autn_present = 1;
+       msg_rx = oap_encoded(&oap_rx);
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == -2);
+       msgb_free(msg_rx);
+       OSMO_ASSERT(!msg_tx);
+
+       /* all data correct */
+       osmo_hexparse("cec4e3848a33000086781158ca40f136",
+                     oap_rx.autn, 16);
+       msg_rx = oap_encoded(&oap_rx);
+
+       /* but refuse to evaluate in uninitialized state */
+       OSMO_ASSERT(state->state == OAP_INITIALIZED);
+
+       state->state = OAP_UNINITIALIZED;
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == -1);
+       OSMO_ASSERT(!msg_tx);
+
+       state->state = OAP_DISABLED;
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == -1);
+       OSMO_ASSERT(!msg_tx);
+
+       state->state = OAP_INITIALIZED;
+
+       /* now everything is correct */
+       printf("  - AUTN success\n");
+       /* a successful return value here indicates correct autn */
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == 0);
+       msgb_free(msg_rx);
+
+       /* Expect the challenge response in msg_tx */
+       OSMO_ASSERT(msg_tx);
+       OSMO_ASSERT(oap_decode(msg_tx->data, msg_tx->len, &oap_tx) == 0);
+       OSMO_ASSERT(oap_tx.message_type == OAP_MSGT_CHALLENGE_RESULT);
+       OSMO_ASSERT(strcmp("e2d05b598c61d9ba",
+                          osmo_hexdump_nospc(oap_tx.xres, sizeof(oap_tx.xres)))
+                   == 0);
+       OSMO_ASSERT(state->state == OAP_SENT_CHALLENGE_RESULT);
+       msgb_free(msg_tx);
+       msg_tx = 0;
+
+       struct oap_state saved_state = _state;
+
+       printf("  - Registration failure\n");
+
+       memset(&oap_rx, 0, sizeof(oap_rx));
+       oap_rx.message_type = OAP_MSGT_REGISTER_ERROR;
+       oap_rx.cause = GMM_CAUSE_PROTO_ERR_UNSPEC;
+       msg_rx = oap_encoded(&oap_rx);
+
+       /* Receive registration error for the first time. */
+       OSMO_ASSERT(state->registration_failures == 0);
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == 0);
+       OSMO_ASSERT(state->registration_failures == 1);
+       OSMO_ASSERT(msg_tx);
+       OSMO_ASSERT(oap_decode(msg_tx->data, msg_tx->len, &oap_tx) == 0);
+       OSMO_ASSERT(oap_tx.message_type == OAP_MSGT_REGISTER_REQUEST);
+       OSMO_ASSERT(state->state == OAP_REQUESTED_CHALLENGE);
+       msgb_free(msg_tx);
+       msg_tx = 0;
+
+       /* Receive registration error for the Nth time. */
+       state->registration_failures = 999;
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == -11);
+       OSMO_ASSERT(!msg_tx);
+       OSMO_ASSERT(state->state == OAP_INITIALIZED);
+       msgb_free(msg_tx);
+       msg_tx = 0;
+
+       msgb_free(msg_rx);
+
+       printf("  - Registration success\n");
+
+       _state = saved_state;
+       memset(&oap_rx, 0, sizeof(oap_rx));
+       oap_rx.message_type = OAP_MSGT_REGISTER_RESULT;
+       msg_rx = oap_encoded(&oap_rx);
+       OSMO_ASSERT(oap_handle(state, msg_rx, &msg_tx) == 0);
+       OSMO_ASSERT(!msg_tx);
+       OSMO_ASSERT(state->state == OAP_REGISTERED);
+       msgb_free(msg_rx);
 }

 static struct log_info_cat gprs_categories[] = {
@@ -50,7 +235,7 @@ int main(int argc, char **argv)
 {
        osmo_init_logging(&info);

-       test_oap();
+       test_oap_api();
        printf("Done\n");

        return 0;
diff --git a/openbsc/tests/oap/oap_test.ok b/openbsc/tests/oap/oap_test.ok
index e411ad9..2e9ecf0 100644
--- a/openbsc/tests/oap/oap_test.ok
+++ b/openbsc/tests/oap/oap_test.ok
@@ -1,2 +1,7 @@
-not implemented
+Testing OAP API
+  - Config parsing
+  - AUTN failures
+  - AUTN success
+  - Registration failure
+  - Registration success
 Done
-- 
2.1.4

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