From d197fbec9aa05a276183140d5eb137c16e5e2f28 Mon Sep 17 00:00:00 2001 From: Tobias Brunner Date: Mon, 29 Jun 2020 14:13:53 +0200 Subject: [PATCH] unit-tests: Add tests for CHILD_SA rekeying with multiple key exchanges --- src/libcharon/tests/suites/test_child_rekey.c | 1186 ++++++++++++++++- 1 file changed, 1185 insertions(+), 1 deletion(-) diff --git a/src/libcharon/tests/suites/test_child_rekey.c b/src/libcharon/tests/suites/test_child_rekey.c index 265e1cd92..e4edddc5d 100644 --- a/src/libcharon/tests/suites/test_child_rekey.c +++ b/src/libcharon/tests/suites/test_child_rekey.c @@ -131,6 +131,118 @@ START_TEST(test_regular) } END_TEST +/** + * Config for multiple KE exchange tests + */ +static exchange_test_sa_conf_t multi_ke_conf = { + .initiator = { + .esp = "aes256-sha256-modp3072-ke1_ecp256", + }, + .responder = { + .esp = "aes256-sha256-modp3072-ke1_ecp256", + }, +}; + +/** + * Regular CHILD_SA rekey either initiated by the original initiator or + * responder of the IKE_SA. + */ +START_TEST(test_regular_multi_ke) +{ + ike_sa_t *a, *b; + uint32_t spi_a = _i+1, spi_b = 2-_i; + + if (_i) + { /* responder rekeys the CHILD_SA (SPI 2) */ + exchange_test_helper->establish_sa(exchange_test_helper, + &b, &a, &multi_ke_conf); + } + else + { /* initiator rekeys the CHILD_SA (SPI 1) */ + exchange_test_helper->establish_sa(exchange_test_helper, + &a, &b, &multi_ke_conf); + } + initiate_rekey(a, spi_a); + assert_ipsec_sas_installed(a, spi_a, spi_b); + + /* this should never get called as this results in a successful rekeying */ + assert_hook_not_called(child_updown); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, KEi, TSi, TSr } --> */ + assert_hook_not_called(child_rekey); + assert_notify(IN, REKEY_SA); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, spi_a, spi_b); + assert_hook(); + + /* <-- CREATE_CHILD_SA { SA, Nr, KEr, TSi, TSr, N(ADD_KE) } */ + assert_hook_not_called(child_rekey); + assert_no_notify(IN, REKEY_SA); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, spi_a, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, spi_a, spi_b); + assert_hook(); + + /* IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } --> */ + assert_hook_called(child_rekey); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(b, spi_a, spi_b, 4); + assert_hook(); + + /* <-- IKE_FOLLOWUP_KE { KEr } */ + assert_hook_called(child_rekey); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_no_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, spi_a, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 3, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, spi_a, spi_b, 3, 4); + assert_hook(); + + /* INFORMATIONAL { D } --> */ + assert_hook_not_called(child_rekey); + assert_jobs_scheduled(1); + assert_single_payload(IN, PLV2_DELETE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(b, 2); + assert_ipsec_sas_installed(b, spi_b, 3, 4); + assert_scheduler(); + assert_hook(); + /* <-- INFORMATIONAL { D } */ + assert_hook_not_called(child_rekey); + assert_jobs_scheduled(1); + assert_single_payload(IN, PLV2_DELETE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, spi_a, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 3, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, spi_a, 3, 4); + assert_scheduler(); + assert_hook(); + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, spi_a); + assert_child_sa_count(a, 1); + assert_ipsec_sas_installed(a, 3, 4); + destroy_rekeyed(b, spi_b); + assert_child_sa_count(b, 1); + assert_ipsec_sas_installed(a, 3, 4); + + /* child_updown */ + assert_hook(); + + call_ikesa(a, destroy); + call_ikesa(b, destroy); +} +END_TEST + /** * CHILD_SA rekey where the responder does not agree with the DH group selected * by the initiator, either initiated by the original initiator or responder of @@ -291,6 +403,203 @@ START_TEST(test_regular_ke_invalid) } END_TEST +/** + * CHILD_SA rekey with multiple key exchanges where the responder does not agree + * with the first key exchange method selected by the initiator, either + * initiated by the original initiator or responder of the IKE_SA. + */ +START_TEST(test_regular_ke_invalid_multi_ke) +{ + exchange_test_sa_conf_t conf = { + .initiator = { + .esp = "aes128-sha256-modp2048-modp3072-ke1_ecp256", + }, + .responder = { + .esp = "aes128-sha256-modp3072-modp2048-ke1_ecp256", + }, + }; + ike_sa_t *a, *b; + uint32_t spi_a = _i+1, spi_b = 2-_i; + + if (_i) + { /* responder rekeys the CHILD_SA (SPI 2) */ + exchange_test_helper->establish_sa(exchange_test_helper, + &b, &a, &conf); + } + else + { /* initiator rekeys the CHILD_SA (SPI 1) */ + exchange_test_helper->establish_sa(exchange_test_helper, + &a, &b, &conf); + } + initiate_rekey(a, spi_a); + assert_ipsec_sas_installed(a, spi_a, spi_b); + + /* this should never get called as this results in a successful rekeying */ + assert_hook_not_called(child_updown); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } --> */ + assert_hook_not_called(child_rekey); + assert_notify(IN, REKEY_SA); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_INSTALLED); + assert_child_sa_count(b, 1); + assert_ipsec_sas_installed(b, spi_a, spi_b); + assert_hook(); + + /* <-- CREATE_CHILD_SA { N(INVAL_KE) } */ + assert_hook_not_called(child_rekey); + assert_single_notify(IN, INVALID_KE_PAYLOAD); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, spi_a, CHILD_REKEYING); + assert_child_sa_count(a, 1); + assert_ipsec_sas_installed(a, spi_a, spi_b); + assert_hook(); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } --> */ + assert_hook_not_called(child_rekey); + assert_notify(IN, REKEY_SA); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, spi_a, spi_b); + assert_hook(); + + /* <-- CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr } */ + assert_hook_not_called(child_rekey); + assert_no_notify(IN, REKEY_SA); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, spi_a, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, spi_a, spi_b); + assert_hook(); + + /* IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } --> */ + assert_hook_called(child_rekey); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 5, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(b, spi_a, spi_b, 5); + assert_hook(); + + /* <-- IKE_FOLLOWUP_KE { KEr } */ + assert_hook_called(child_rekey); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_no_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, spi_a, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, spi_a, spi_b, 4, 5); + assert_hook(); + + /* INFORMATIONAL { D } --> */ + assert_hook_not_called(child_rekey); + assert_single_payload(IN, PLV2_DELETE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 5, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(b, 2); + assert_ipsec_sas_installed(b, spi_b, 4, 5); + assert_hook(); + + /* <-- INFORMATIONAL { D } */ + assert_hook_not_called(child_rekey); + assert_single_payload(IN, PLV2_DELETE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, spi_a, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 4, CHILD_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, spi_a, 4, 5); + assert_hook(); + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, spi_a); + assert_child_sa_count(a, 1); + assert_ipsec_sas_installed(a, 4, 5); + destroy_rekeyed(b, spi_b); + assert_child_sa_count(b, 1); + assert_ipsec_sas_installed(b, 4, 5); + + /* child_updown */ + assert_hook(); + + /* because the DH group should get reused another rekeying should complete + * without additional exchange */ + initiate_rekey(a, 4); + /* this should never get called as this results in a successful rekeying */ + assert_hook_not_called(child_updown); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } --> */ + assert_hook_not_called(child_rekey); + assert_notify(IN, REKEY_SA); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 5, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 4, 5); + assert_hook(); + + /* <-- CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr } */ + assert_hook_not_called(child_rekey); + assert_no_notify(IN, REKEY_SA); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 4, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 4, 5); + assert_hook(); + + /* IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } --> */ + assert_hook_called(child_rekey); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 5, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 7, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(b, 4, 5, 7); + assert_hook(); + + /* <-- IKE_FOLLOWUP_KE { KEr } */ + assert_hook_called(child_rekey); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_no_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 4, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 4, 5, 6, 7); + assert_hook(); + + /* INFORMATIONAL { D } --> */ + assert_hook_not_called(child_rekey); + assert_single_payload(IN, PLV2_DELETE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 5, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 7, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(b, 2); + assert_ipsec_sas_installed(b, 5, 6, 7); + assert_hook(); + + /* <-- INFORMATIONAL { D } */ + assert_hook_not_called(child_rekey); + assert_single_payload(IN, PLV2_DELETE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 4, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 6, CHILD_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, 4, 6, 7); + assert_hook(); + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, 4); + assert_child_sa_count(a, 1); + assert_ipsec_sas_installed(a, 6, 7); + destroy_rekeyed(b, 5); + assert_child_sa_count(b, 1); + assert_ipsec_sas_installed(b, 6, 7); + + /* child_updown */ + assert_hook(); + + call_ikesa(a, destroy); + call_ikesa(b, destroy); +} +END_TEST + /** * Check that the responder ignores soft expires while waiting for the delete * after a rekeying. @@ -446,7 +755,7 @@ START_TEST(test_regular_responder_handle_hard_expire) END_TEST /** - * Both peers initiate the CHILD_SA reekying concurrently and should handle + * Both peers initiate the CHILD_SA rekeying concurrently and should handle * the collision properly depending on the nonces. */ START_TEST(test_collision) @@ -653,6 +962,443 @@ START_TEST(test_collision) } END_TEST +/** + * Both peers initiate a multi-KE CHILD_SA rekeying concurrently and should + * handle the collision properly depending on the nonces. + */ +START_TEST(test_collision_multi_ke) +{ + ike_sa_t *a, *b; + + exchange_test_helper->establish_sa(exchange_test_helper, + &a, &b, &multi_ke_conf); + + /* When rekeyings collide we get two CHILD_SAs with a total of four nonces. + * The CHILD_SA with the lowest nonce SHOULD be deleted by the peer that + * created that CHILD_SA. However, with multiple key exchanges, no CHILD_SA + * has yet been established, so the losing peer just doesn't continue with + * IKE_FOLLOWUP_KE exchanges (i.e. that SA is not explicitly deleted later). + * The replaced CHILD_SA is deleted by the peer that initiated the + * surviving SA. Four nonces and SPIs are needed (SPI 1 and 2 are used for + * the initial CHILD_SA): + * N1/3 -----\ /----- N2/4 + * \--/-----> N3/5 + * N4/6 <-------/ /----- ... + * ... -----\ + * We test this four times, each time a different nonce is the lowest. + */ + struct { + /* Nonces used at each point */ + u_char nonces[4]; + /* SPIs of the deleted CHILD_SA (either redundant or replaced) */ + uint32_t spi_del_a, spi_del_b; + /* SPIs of the kept CHILD_SA */ + uint32_t spi_a, spi_b; + } data[] = { + { { 0x00, 0xFF, 0xFF, 0xFF }, 3, 2, 6, 4 }, + { { 0xFF, 0x00, 0xFF, 0xFF }, 1, 4, 3, 5 }, + { { 0xFF, 0xFF, 0x00, 0xFF }, 3, 2, 6, 4 }, + { { 0xFF, 0xFF, 0xFF, 0x00 }, 1, 4, 3, 5 }, + }; + + exchange_test_helper->nonce_first_byte = data[_i].nonces[0]; + initiate_rekey(a, 1); + assert_ipsec_sas_installed(a, 1, 2); + exchange_test_helper->nonce_first_byte = data[_i].nonces[1]; + initiate_rekey(b, 2); + assert_ipsec_sas_installed(b, 1, 2); + + /* this should never get called as this results in a successful rekeying */ + assert_hook_not_called(child_updown); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, KEi, TSi, TSr } --> */ + exchange_test_helper->nonce_first_byte = data[_i].nonces[2]; + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2); + assert_hook(); + + /* <-- CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, KEi, TSi, TSr } */ + exchange_test_helper->nonce_first_byte = data[_i].nonces[3]; + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 1, 2); + assert_hook(); + + /* <-- CREATE_CHILD_SA { SA, Nr, KEr, TSi, TSr, N(ADD_KE) } */ + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + /* if a won, it must remove the passive task, otherwise the active task, + * no new SA is yet created */ + assert_num_tasks(a, data[_i].spi_del_a == 1 ? 0 : 1, TASK_QUEUE_PASSIVE); + assert_num_tasks(a, data[_i].spi_del_a == 1 ? 1 : 0, TASK_QUEUE_ACTIVE); + assert_child_sa_state(a, 1, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 1, 2); + assert_hook(); + + /* CREATE_CHILD_SA { SA, Nr, KEr, TSi, TSr, N(ADD_KE) } --> */ + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_num_tasks(b, data[_i].spi_del_b == 2 ? 0 : 1, TASK_QUEUE_PASSIVE); + assert_num_tasks(b, data[_i].spi_del_b == 2 ? 1 : 0, TASK_QUEUE_ACTIVE); + assert_child_sa_state(b, 2, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2); + assert_hook(); + + if (data[_i].spi_del_a == 1) + { + /* IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } --> */ + assert_hook_rekey(child_rekey, 2, 5); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 5, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(b, 1, 2, 5); + assert_hook(); + + /* <-- IKE_FOLLOWUP_KE { KEr } */ + assert_hook_rekey(child_rekey, 1, data[_i].spi_a); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_no_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 3, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 1, 2, 3, 5); + assert_hook(); + } + else + { + /* <-- IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } */ + assert_hook_rekey(child_rekey, 1, 6); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(a, 1, 2, 6); + assert_hook(); + + /* IKE_FOLLOWUP_KE { KEr } --> */ + assert_hook_rekey(child_rekey, 2, data[_i].spi_b); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_no_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2, 4, 6); + assert_hook(); + } + + /* we don't expect this hook to get called anymore */ + assert_hook_not_called(child_rekey); + + if (data[_i].spi_del_a == 1) + { + /* INFORMATIONAL { D } --> */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 5, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(b, 2); + assert_ipsec_sas_installed(b, 2, 3, 5); + assert_scheduler(); + + /* <-- INFORMATIONAL { D } */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 3, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, 1, 3, 5); + assert_scheduler(); + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, data[_i].spi_del_a); + destroy_rekeyed(b, data[_i].spi_del_a); + } + else + { + /* <-- INFORMATIONAL { D } */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, 1, 4, 6); + assert_scheduler(); + + /* INFORMATIONAL { D } --> */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(b, 2); + assert_ipsec_sas_installed(b, 2, 4, 6); + assert_scheduler(); + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, data[_i].spi_del_b); + destroy_rekeyed(b, data[_i].spi_del_b); + } + + assert_child_sa_count(a, 1); + assert_ipsec_sas_installed(a, data[_i].spi_a, data[_i].spi_b); + assert_child_sa_count(b, 1); + assert_ipsec_sas_installed(b, data[_i].spi_a, data[_i].spi_b); + + /* child_rekey/child_updown */ + assert_hook(); + assert_hook(); + + call_ikesa(a, destroy); + call_ikesa(b, destroy); +} +END_TEST + +/** + * Both peers initiate a CHILD_SA rekeying concurrently, but only one of them + * proposes multiple key exchanges, they should still handle the collision + * properly. + */ +START_TEST(test_collision_mixed) +{ + exchange_test_sa_conf_t conf = { + .initiator = { + .esp = "aes256-sha256-modp3072-ke1_ecp256,aes256-sha256-modp3072", + }, + .responder = { + .esp = "aes256-sha256-modp3072,aes256-sha256-modp3072-ke1_ecp256", + }, + }; + ike_sa_t *a, *b; + + /* let's accept what the peer proposes first */ + lib->settings->set_bool(lib->settings, "%s.prefer_configured_proposals", + FALSE, lib->ns); + + exchange_test_helper->establish_sa(exchange_test_helper, + &a, &b, &conf); + + /* When rekeyings collide we get two CHILD_SAs with a total of four nonces. + * The CHILD_SA with the lowest nonce SHOULD be deleted by the peer that + * created that CHILD_SA. However, with multiple key exchanges, no CHILD_SA + * has yet been established, so the losing peer just doesn't continue with + * IKE_FOLLOWUP_KE exchanges (i.e. that SA is not explicitly deleted later). + * The replaced CHILD_SA is deleted by the peer that initiated the + * surviving SA. Four nonces and SPIs are needed (SPI 1 and 2 are used for + * the initial CHILD_SA): + * N1/3 -----\ /----- N2/4 + * \--/-----> N3/5 + * N4/6 <-------/ /----- ... + * ... -----\ + * We test this four times, each time a different nonce is the lowest. + */ + struct { + /* Nonces used at each point */ + u_char nonces[4]; + /* SPIs of the deleted CHILD_SA (either redundant or replaced) */ + uint32_t spi_del_a, spi_del_b; + /* SPIs of the kept CHILD_SA */ + uint32_t spi_a, spi_b; + } data[] = { + { { 0x00, 0xFF, 0xFF, 0xFF }, 3, 2, 6, 4 }, + { { 0xFF, 0x00, 0xFF, 0xFF }, 1, 4, 3, 5 }, + { { 0xFF, 0xFF, 0x00, 0xFF }, 3, 2, 6, 4 }, + { { 0xFF, 0xFF, 0xFF, 0x00 }, 1, 4, 3, 5 }, + }; + + exchange_test_helper->nonce_first_byte = data[_i].nonces[0]; + initiate_rekey(a, 1); + assert_ipsec_sas_installed(a, 1, 2); + exchange_test_helper->nonce_first_byte = data[_i].nonces[1]; + initiate_rekey(b, 2); + assert_ipsec_sas_installed(b, 1, 2); + + /* this should never get called as this results in a successful rekeying */ + assert_hook_not_called(child_updown); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, KEi, TSi, TSr } --> */ + exchange_test_helper->nonce_first_byte = data[_i].nonces[2]; + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2); + assert_hook(); + + /* <-- CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, KEi, TSi, TSr } */ + exchange_test_helper->nonce_first_byte = data[_i].nonces[3]; + assert_hook_rekey(child_rekey, 1, 6); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(a, 1, 2, 6); + assert_hook(); + + /* <-- CREATE_CHILD_SA { SA, Nr, KEr, TSi, TSr, N(ADD_KE) } */ + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + /* the single-KE passive task was completed and adopted above */ + assert_num_tasks(a, 0, TASK_QUEUE_PASSIVE); + if (data[_i].spi_del_a == 1) + { + assert_num_tasks(a, 1, TASK_QUEUE_ACTIVE); + assert_child_sa_state(a, 1, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_REKEYED, CHILD_OUTBOUND_REGISTERED); + } + else + { + assert_num_tasks(a, 0, TASK_QUEUE_ACTIVE); + assert_child_sa_state(a, 1, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + } + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, 1, 2, 6); + assert_hook(); + + if (data[_i].spi_del_a == 1) + { + /* CREATE_CHILD_SA { SA, Nr, KEr, TSi, TSr, N(ADD_KE) } --> */ + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_num_tasks(b, 1, TASK_QUEUE_PASSIVE); + assert_num_tasks(b, 1, TASK_QUEUE_ACTIVE); + assert_child_sa_state(b, 2, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 4, CHILD_DELETING, CHILD_OUTBOUND_REGISTERED); + assert_child_sa_count(b, 2); + assert_ipsec_sas_installed(b, 1, 2, 4); + assert_hook(); + + /* IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } --> */ + assert_hook_rekey(child_rekey, 2, 5); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 4, CHILD_DELETING, CHILD_OUTBOUND_REGISTERED); + assert_child_sa_state(b, 5, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_child_sa_count(b, 3); + assert_ipsec_sas_installed(b, 1, 2, 4, 5); + assert_hook(); + + /* <-- INFORMATIONAL { D } */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, 1, 2, 6); + assert_scheduler(); + + /* <-- IKE_FOLLOWUP_KE { KEr } */ + /* currently we call this again if we keep our own replacement as we + * already called it above */ + assert_hook_rekey(child_rekey, 1, data[_i].spi_a); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_no_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 3, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_ipsec_sas_installed(a, 1, 2, 3, 5, 6); + assert_hook(); + } + else + { + /* CREATE_CHILD_SA { SA, Nr, KEr, TSi, TSr, N(ADD_KE) } --> */ + assert_hook_rekey(child_rekey, 2, 4); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_num_tasks(b, 0, TASK_QUEUE_PASSIVE); + assert_num_tasks(b, 1, TASK_QUEUE_ACTIVE); + assert_child_sa_state(b, 2, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(b, 1, 2, 4, 6); + assert_hook(); + } + + /* we don't expect this hook to get called anymore */ + assert_hook_not_called(child_rekey); + + if (data[_i].spi_del_a == 1) + { + /* INFORMATIONAL { D } --> */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 4, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 5, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_child_sa_count(b, 3); + assert_ipsec_sas_installed(b, 1, 2, 4, 5); + assert_scheduler(); + + /* INFORMATIONAL { D } --> */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 4, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 5, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(b, 3); + assert_ipsec_sas_installed(b, 2, 4, 3, 5); + assert_scheduler(); + + /* <-- INFORMATIONAL { D } */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 3, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_count(a, 3); + assert_ipsec_sas_installed(a, 1, 3, 5, 6); + assert_scheduler(); + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, data[_i].spi_del_a); + destroy_rekeyed(a, data[_i].spi_del_b); + destroy_rekeyed(b, data[_i].spi_del_a); + destroy_rekeyed(b, data[_i].spi_del_b); + } + else + { + /* <-- INFORMATIONAL { D } */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, 1, 4, 6); + assert_scheduler(); + + /* INFORMATIONAL { D } --> */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(b, 2); + assert_ipsec_sas_installed(b, 2, 4, 6); + assert_scheduler(); + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, data[_i].spi_del_b); + destroy_rekeyed(b, data[_i].spi_del_b); + } + + assert_child_sa_count(a, 1); + assert_ipsec_sas_installed(a, data[_i].spi_a, data[_i].spi_b); + assert_child_sa_count(b, 1); + assert_ipsec_sas_installed(b, data[_i].spi_a, data[_i].spi_b); + + /* child_rekey/child_updown */ + assert_hook(); + assert_hook(); + + call_ikesa(a, destroy); + call_ikesa(b, destroy); +} +END_TEST + /** * This is like the rekey collision above, but one peer deletes the * redundant/old SA before the other peer receives the CREATE_CHILD_SA @@ -875,6 +1621,177 @@ START_TEST(test_collision_delayed_response) } END_TEST +/** + * This is like a regular rekey collision, but one CREATE_CHILD_SA response + * is delayed: + * Peer A Peer B + * rekey ----\ /---- rekey + * \-----/----> detect collision + * detect collision <---------/ /---- + * -----------/----> + * handle KE <---------/------ send additional KE (if won) + * ---------/------> + * handle rekey <-------/ + * additional KE ----------------> handle KE (if lost) + * <---------------- + * ... the winner deletes the old SA + * + * If A wins the collision, this is just a regular collision as B will simply + * abort its own rekeying and wait until A receives the response and continues + * with its IKE_FOLLOWUP_KE request. So we only look at the cases in which + * B wins. + * + * Besides the scenario depicted above, i.e. where the response arrives after + * handling B's IKE_FOLLOWUP_KE request, we also test when it arrives after + * handling the delete. + */ +START_TEST(test_collision_delayed_response_multi_ke) +{ + ike_sa_t *a, *b; + message_t *msg; + bool after_delete = _i >= 2; + + _i %= 2; + + exchange_test_helper->establish_sa(exchange_test_helper, + &a, &b, &multi_ke_conf); + + /* Four nonces and SPIs are needed (SPI 1 and 2 are used for the initial + * CHILD_SA): + * N1/3 -----\ /----- N2/4 + * \--/-----> N3/5 + * N4/6 <-------/ /----- ... + * ... -----\ + * We test this four times, B wins each time (with either of its nonces), + * but the response arrives at different times. + */ + struct { + /* Nonces used at each point */ + u_char nonces[4]; + /* SPIs of the deleted CHILD_SA (either redundant or replaced) */ + uint32_t spi_del_a, spi_del_b; + /* SPIs of the kept CHILD_SA */ + uint32_t spi_a, spi_b; + } data[] = { + { { 0x00, 0xFF, 0xFF, 0xFF }, 3, 2, 6, 4 }, + { { 0xFF, 0xFF, 0x00, 0xFF }, 3, 2, 6, 4 }, + }; + + exchange_test_helper->nonce_first_byte = data[_i].nonces[0]; + initiate_rekey(a, 1); + assert_ipsec_sas_installed(a, 1, 2); + exchange_test_helper->nonce_first_byte = data[_i].nonces[1]; + initiate_rekey(b, 2); + assert_ipsec_sas_installed(b, 1, 2); + + /* this should never get called as this results in a successful rekeying */ + assert_hook_not_called(child_updown); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } --> */ + exchange_test_helper->nonce_first_byte = data[_i].nonces[2]; + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2); + assert_hook(); + + /* <-- CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } */ + exchange_test_helper->nonce_first_byte = data[_i].nonces[3]; + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 1, 2); + assert_hook(); + + /* delay the CREATE_CHILD_SA response from b to a */ + msg = exchange_test_helper->sender->dequeue(exchange_test_helper->sender); + + /* CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr } --> */ + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_num_tasks(b, 0, TASK_QUEUE_PASSIVE); + assert_num_tasks(b, 1, TASK_QUEUE_ACTIVE); + assert_child_sa_state(b, 2, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2); + assert_hook(); + + /* <-- IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } */ + assert_hook_rekey(child_rekey, 1, 6); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(a, 1, 2, 6); + assert_hook(); + + /* IKE_FOLLOWUP_KE { KEr } --> */ + assert_hook_rekey(child_rekey, 2, 4); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2, 4, 6); + assert_hook(); + + /* we don't expect this hook to get called anymore */ + assert_hook_not_called(child_rekey); + + if (!after_delete) + { /* a receives the response right after the IKE_FOLLOWUP_KE, the passive + * rekeying is completed and the active aborted */ + /* <-- CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr } (delayed) */ + exchange_test_helper->process_message(exchange_test_helper, a, msg); + assert_num_tasks(a, 0, TASK_QUEUE_PASSIVE); + assert_num_tasks(a, 0, TASK_QUEUE_ACTIVE); + assert_child_sa_state(a, 1, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(a, 1, 2, 6); + } + + /* <-- INFORMATIONAL { D } */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 1, 4, 6); + assert_child_sa_count(a, 2); + assert_scheduler(); + + /* INFORMATIONAL { D } --> */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 2, 4, 6); + assert_child_sa_count(b, 2); + assert_scheduler(); + + if (after_delete) + { + /* <-- CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr } (delayed) */ + exchange_test_helper->process_message(exchange_test_helper, a, msg); + assert_num_tasks(a, 0, TASK_QUEUE_PASSIVE); + assert_num_tasks(a, 0, TASK_QUEUE_ACTIVE); + assert_child_sa_state(a, 1, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 6, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 1, 4, 6); + } + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, data[_i].spi_del_b); + assert_child_sa_count(a, 1); + assert_ipsec_sas_installed(a, data[_i].spi_a, data[_i].spi_b); + destroy_rekeyed(b, data[_i].spi_del_b); + assert_child_sa_count(b, 1); + assert_ipsec_sas_installed(b, data[_i].spi_a, data[_i].spi_b); + + /* child_rekey/child_updown */ + assert_hook(); + assert_hook(); + + call_ikesa(a, destroy); + call_ikesa(b, destroy); +} +END_TEST + /** * In this scenario one of the peers does not notice that there is a * rekey collision: @@ -1121,6 +2038,178 @@ START_TEST(test_collision_delayed_request_more) } END_TEST +/** + * In this scenario one of the peers does not notice that there is a + * rekey collision: + * + * rekey ----\ /---- rekey + * \ / + * detect collision <-----\---/ + * -------\--------> + * \ /---- send additional KE + * \-/----> detect collision + * handle KE <---------/ /---- TEMP_FAIL + * -----------/----> + * <---------/------ delete old SA + * delete ---------/------> + * aborts rekeying <-------/ + * + * In a variation of this scenario, the TEMP_FAIL notify arrives before the + * delete does. + */ +START_TEST(test_collision_delayed_request_multi_ke) +{ + ike_sa_t *a, *b; + message_t *msg; + bool after_delete = _i >= 3; + + _i %= 3; + + exchange_test_helper->establish_sa(exchange_test_helper, + &a, &b, &multi_ke_conf); + + /* Three nonces and SPIs are needed (SPI 1 and 2 are used for the initial + * CHILD_SA): + * N1/3 -----\ /----- N2/4 + * N3/5 <-----\--/ + * ... -----\ \-------> ... + * We test this three times, each time a different nonce is the lowest. + */ + struct { + /* Nonces used at each point */ + u_char nonces[3]; + } data[] = { + { { 0x00, 0xFF, 0xFF } }, + { { 0xFF, 0x00, 0xFF } }, + { { 0xFF, 0xFF, 0x00 } }, + }; + + exchange_test_helper->nonce_first_byte = data[_i].nonces[0]; + initiate_rekey(a, 1); + assert_ipsec_sas_installed(a, 1, 2); + exchange_test_helper->nonce_first_byte = data[_i].nonces[1]; + initiate_rekey(b, 2); + assert_ipsec_sas_installed(b, 1, 2); + + /* delay the CREATE_CHILD_SA request from a to b */ + msg = exchange_test_helper->sender->dequeue(exchange_test_helper->sender); + + /* this should never get called as this results in a successful rekeying */ + assert_hook_not_called(child_updown); + + /* <-- CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } */ + exchange_test_helper->nonce_first_byte = data[_i].nonces[2]; + assert_hook_not_called(child_rekey); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(a, 1, 2); + assert_hook(); + + /* CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr, N(ADD_KE) } --> */ + assert_hook_not_called(child_rekey); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2); + assert_hook(); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } --> (delayed) */ + assert_single_notify(OUT, TEMPORARY_FAILURE); + exchange_test_helper->process_message(exchange_test_helper, b, msg); + + /* <-- IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } */ + assert_hook_rekey(child_rekey, 1, 5); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_num_tasks(a, 0, TASK_QUEUE_PASSIVE); + assert_num_tasks(a, 1, TASK_QUEUE_ACTIVE); + assert_child_sa_state(a, 1, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 5, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(a, 1, 2, 5); + assert_hook(); + + /* <-- CREATE_CHILD_SA { N(TEMP_FAIL) } */ + if (!after_delete) + { + assert_hook_not_called(child_rekey); + assert_no_jobs_scheduled(); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_num_tasks(a, 0, TASK_QUEUE_ACTIVE); + assert_child_sa_state(a, 1, CHILD_REKEYED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(a, 5, CHILD_INSTALLED, CHILD_OUTBOUND_REGISTERED); + assert_ipsec_sas_installed(a, 1, 2, 5); + assert_scheduler(); + assert_hook(); + } + else + { /* delay until we received the delete */ + msg = exchange_test_helper->sender->dequeue(exchange_test_helper->sender); + } + + /* IKE_FOLLOWUP_KE { KEr } --> */ + assert_hook_rekey(child_rekey, 2, 4); + assert_payload(IN, PLV2_KEY_EXCHANGE); + assert_no_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_ipsec_sas_installed(b, 1, 2, 4, 5); + assert_hook(); + + /* we don't expect this hook to get called anymore */ + assert_hook_not_called(child_rekey); + + /* <-- INFORMATIONAL { D } */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, 1, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 5, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, 1, 4, 5); + assert_scheduler(); + + /* INFORMATIONAL { D } --> */ + assert_jobs_scheduled(1); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, 2, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(b, 4, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(b, 2); + assert_ipsec_sas_installed(b, 2, 4, 5); + assert_scheduler(); + + if (after_delete) + { + /* <-- CREATE_CHILD_SA { N(TEMP_FAIL) } */ + assert_no_jobs_scheduled(); + exchange_test_helper->process_message(exchange_test_helper, a, msg); + assert_num_tasks(a, 0, TASK_QUEUE_ACTIVE); + assert_child_sa_state(a, 1, CHILD_DELETED, CHILD_OUTBOUND_NONE); + assert_child_sa_state(a, 5, CHILD_INSTALLED, CHILD_OUTBOUND_INSTALLED); + assert_child_sa_count(a, 2); + assert_ipsec_sas_installed(a, 1, 4, 5); + assert_scheduler(); + } + + /* simulate the execution of the scheduled jobs */ + destroy_rekeyed(a, 1); + assert_child_sa_count(a, 1); + assert_ipsec_sas_installed(a, 4, 5); + destroy_rekeyed(b, 2); + assert_child_sa_count(b, 1); + assert_ipsec_sas_installed(b, 4, 5); + + /* child_rekey/child_updown */ + assert_hook(); + assert_hook(); + + assert_sa_idle(a); + assert_sa_idle(b); + + call_ikesa(a, destroy); + call_ikesa(b, destroy); +} +END_TEST + /** * Both peers initiate the CHILD_SA reekying concurrently but the proposed DH * groups are not the same after handling the INVALID_KE_PAYLOAD they should @@ -1582,6 +2671,94 @@ START_TEST(test_collision_delete) } END_TEST +/** + * One of the hosts initiates a DELETE of the CHILD_SA the other peer is + * concurrently trying to rekey with multiple key exchanges. + * + * rekey ----------------> + * <---------------- + * additional ke ----\ /---- delete + * \-----/----> detect collision + * detect collision <---------/ /---- TEMP_FAIL + * delete -----------/----> + * aborts rekeying <---------/ + */ +START_TEST(test_collision_delete_multi_ke) +{ + ike_sa_t *a, *b; + uint32_t spi_a = _i+1, spi_b = 2-_i; + + if (_i) + { /* responder rekeys the CHILD_SA (SPI 2) */ + exchange_test_helper->establish_sa(exchange_test_helper, + &b, &a, &multi_ke_conf); + } + else + { /* initiator rekeys the CHILD_SA (SPI 1) */ + exchange_test_helper->establish_sa(exchange_test_helper, + &a, &b, &multi_ke_conf); + } + initiate_rekey(a, spi_a); + + /* this should never get called as there is no successful rekeying on + * either side */ + assert_hook_not_called(child_rekey); + + /* CREATE_CHILD_SA { N(REKEY_SA), SA, Ni, [KEi,] TSi, TSr } --> */ + assert_notify(IN, REKEY_SA); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + + /* <-- CREATE_CHILD_SA { SA, Nr, [KEr,] TSi, TSr, N(ADD_KE) } */ + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_state(a, spi_a, CHILD_REKEYING, CHILD_OUTBOUND_INSTALLED); + + call_ikesa(b, delete_child_sa, PROTO_ESP, spi_b, FALSE); + assert_child_sa_state(b, spi_b, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + + /* IKE_FOLLOWUP_KE { KEi, N(ADD_KE) } --> */ + assert_hook_not_called(child_updown); + assert_notify(IN, ADDITIONAL_KEY_EXCHANGE); + assert_single_notify(OUT, TEMPORARY_FAILURE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_state(b, spi_b, CHILD_DELETING, CHILD_OUTBOUND_INSTALLED); + assert_hook(); + + /* <-- INFORMATIONAL { D } */ + assert_hook_updown(child_updown, FALSE); + assert_single_payload(IN, PLV2_DELETE); + assert_single_payload(OUT, PLV2_DELETE); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_child_sa_count(a, 0); + assert_hook(); + + /* <-- CREATE_CHILD_SA { N(TEMP_FAIL) } */ + assert_hook_not_called(child_updown); + /* we don't expect a job to retry the rekeying */ + assert_no_jobs_scheduled(); + exchange_test_helper->process_message(exchange_test_helper, a, NULL); + assert_num_tasks(a, 0, TASK_QUEUE_ACTIVE); + assert_scheduler(); + assert_hook(); + + /* INFORMATIONAL { D } --> */ + assert_hook_updown(child_updown, FALSE); + exchange_test_helper->process_message(exchange_test_helper, b, NULL); + assert_child_sa_count(b, 0); + assert_hook(); + + /* child_rekey */ + assert_hook(); + + assert_sa_idle(a); + assert_sa_idle(b); + + call_ikesa(a, destroy); + call_ikesa(b, destroy); +} +END_TEST + /** * One of the hosts initiates a DELETE of the CHILD_SA the other peer is * concurrently trying to rekey. However, the delete request is delayed or @@ -1949,22 +3126,29 @@ Suite *child_rekey_suite_create() tc = tcase_create("regular"); tcase_add_loop_test(tc, test_regular, 0, 2); + tcase_add_loop_test(tc, test_regular_multi_ke, 0, 2); tcase_add_loop_test(tc, test_regular_ke_invalid, 0, 2); + tcase_add_loop_test(tc, test_regular_ke_invalid_multi_ke, 0, 2); tcase_add_test(tc, test_regular_responder_ignore_soft_expire); tcase_add_test(tc, test_regular_responder_handle_hard_expire); suite_add_tcase(s, tc); tc = tcase_create("collisions rekey"); tcase_add_loop_test(tc, test_collision, 0, 4); + tcase_add_loop_test(tc, test_collision_multi_ke, 0, 4); + tcase_add_loop_test(tc, test_collision_mixed, 0, 4); tcase_add_loop_test(tc, test_collision_delayed_response, 0, 4); + tcase_add_loop_test(tc, test_collision_delayed_response_multi_ke, 0, 4); tcase_add_loop_test(tc, test_collision_delayed_request, 0, 3); tcase_add_loop_test(tc, test_collision_delayed_request_more, 0, 3); + tcase_add_loop_test(tc, test_collision_delayed_request_multi_ke, 0, 6); tcase_add_loop_test(tc, test_collision_ke_invalid, 0, 4); tcase_add_loop_test(tc, test_collision_ke_invalid_delayed_retry, 0, 3); suite_add_tcase(s, tc); tc = tcase_create("collisions delete"); tcase_add_loop_test(tc, test_collision_delete, 0, 2); + tcase_add_loop_test(tc, test_collision_delete_multi_ke, 0, 2); tcase_add_loop_test(tc, test_collision_delete_drop_delete, 0, 2); tcase_add_loop_test(tc, test_collision_delete_drop_rekey, 0, 2); suite_add_tcase(s, tc);