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- /* Copyright (c) 2016-2018, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file test_hs_client.c
- * \brief Test prop224 HS client functionality.
- */
- #define CRYPTO_PRIVATE
- #define MAIN_PRIVATE
- #define HS_CLIENT_PRIVATE
- #define TOR_CHANNEL_INTERNAL_
- #define CIRCUITBUILD_PRIVATE
- #define CIRCUITLIST_PRIVATE
- #define CONNECTION_PRIVATE
- #include "test/test.h"
- #include "test/test_helpers.h"
- #include "test/log_test_helpers.h"
- #include "test/rend_test_helpers.h"
- #include "test/hs_test_helpers.h"
- #include "app/config/config.h"
- #include "lib/crypt_ops/crypto_cipher.h"
- #include "lib/crypt_ops/crypto_dh.h"
- #include "core/or/channeltls.h"
- #include "feature/dircache/directory.h"
- #include "core/mainloop/main.h"
- #include "feature/nodelist/nodelist.h"
- #include "feature/nodelist/routerset.h"
- #include "feature/hs/hs_circuit.h"
- #include "feature/hs/hs_circuitmap.h"
- #include "feature/hs/hs_client.h"
- #include "feature/hs/hs_ident.h"
- #include "feature/hs/hs_cache.h"
- #include "core/or/circuitlist.h"
- #include "core/or/circuitbuild.h"
- #include "core/mainloop/connection.h"
- #include "core/or/connection_edge.h"
- #include "feature/nodelist/networkstatus.h"
- #include "core/or/cpath_build_state_st.h"
- #include "core/or/crypt_path_st.h"
- #include "feature/dircommon/dir_connection_st.h"
- #include "core/or/entry_connection_st.h"
- #include "core/or/extend_info_st.h"
- #include "feature/nodelist/networkstatus_st.h"
- #include "core/or/origin_circuit_st.h"
- #include "core/or/socks_request_st.h"
- static int
- mock_connection_ap_handshake_send_begin(entry_connection_t *ap_conn)
- {
- (void) ap_conn;
- return 0;
- }
- static networkstatus_t mock_ns;
- /* Always return NULL. */
- static networkstatus_t *
- mock_networkstatus_get_live_consensus_false(time_t now)
- {
- (void) now;
- return NULL;
- }
- static networkstatus_t *
- mock_networkstatus_get_live_consensus(time_t now)
- {
- (void) now;
- return &mock_ns;
- }
- /* Test helper function: Setup a circuit and a stream with the same hidden
- * service destination, and put them in <b>circ_out</b> and
- * <b>conn_out</b>. Make the stream wait for circuits to be established to the
- * hidden service. */
- static int
- helper_get_circ_and_stream_for_test(origin_circuit_t **circ_out,
- connection_t **conn_out,
- int is_legacy)
- {
- int retval;
- channel_tls_t *n_chan=NULL;
- rend_data_t *conn_rend_data = NULL;
- origin_circuit_t *or_circ = NULL;
- connection_t *conn = NULL;
- ed25519_public_key_t service_pk;
- /* Make a dummy connection stream and make it wait for our circuit */
- conn = test_conn_get_connection(AP_CONN_STATE_CIRCUIT_WAIT,
- CONN_TYPE_AP /* ??? */,
- 0);
- if (is_legacy) {
- /* Legacy: Setup rend_data of stream */
- char service_id[REND_SERVICE_ID_LEN_BASE32+1] = {0};
- TO_EDGE_CONN(conn)->rend_data = mock_rend_data(service_id);
- conn_rend_data = TO_EDGE_CONN(conn)->rend_data;
- } else {
- /* prop224: Setup hs conn identifier on the stream */
- ed25519_secret_key_t sk;
- tt_int_op(0, OP_EQ, ed25519_secret_key_generate(&sk, 0));
- tt_int_op(0, OP_EQ, ed25519_public_key_generate(&service_pk, &sk));
- /* Setup hs_conn_identifier of stream */
- TO_EDGE_CONN(conn)->hs_ident = hs_ident_edge_conn_new(&service_pk);
- }
- /* Make it wait for circuit */
- connection_ap_mark_as_pending_circuit(TO_ENTRY_CONN(conn));
- /* This is needed to silence a BUG warning from
- connection_edge_update_circuit_isolation() */
- TO_ENTRY_CONN(conn)->original_dest_address =
- tor_strdup(TO_ENTRY_CONN(conn)->socks_request->address);
- /****************************************************/
- /* Now make dummy circuit */
- or_circ = origin_circuit_new();
- or_circ->base_.purpose = CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED;
- or_circ->build_state = tor_malloc_zero(sizeof(cpath_build_state_t));
- or_circ->build_state->is_internal = 1;
- if (is_legacy) {
- /* Legacy: Setup rend data and final cpath */
- or_circ->build_state->pending_final_cpath =
- tor_malloc_zero(sizeof(crypt_path_t));
- or_circ->build_state->pending_final_cpath->magic = CRYPT_PATH_MAGIC;
- or_circ->build_state->pending_final_cpath->rend_dh_handshake_state =
- crypto_dh_new(DH_TYPE_REND);
- tt_assert(
- or_circ->build_state->pending_final_cpath->rend_dh_handshake_state);
- retval = crypto_dh_generate_public(
- or_circ->build_state->pending_final_cpath->rend_dh_handshake_state);
- tt_int_op(retval, OP_EQ, 0);
- or_circ->rend_data = rend_data_dup(conn_rend_data);
- } else {
- /* prop224: Setup hs ident on the circuit */
- or_circ->hs_ident = hs_ident_circuit_new(&service_pk,
- HS_IDENT_CIRCUIT_RENDEZVOUS);
- }
- TO_CIRCUIT(or_circ)->state = CIRCUIT_STATE_OPEN;
- /* fake n_chan */
- n_chan = tor_malloc_zero(sizeof(channel_tls_t));
- n_chan->base_.global_identifier = 1;
- or_circ->base_.n_chan = &(n_chan->base_);
- *circ_out = or_circ;
- *conn_out = conn;
- return 0;
- done:
- /* something failed */
- return -1;
- }
- /* Test: Ensure that setting up legacy e2e rendezvous circuits works
- * correctly. */
- static void
- test_e2e_rend_circuit_setup_legacy(void *arg)
- {
- ssize_t retval;
- origin_circuit_t *or_circ = NULL;
- connection_t *conn = NULL;
- (void) arg;
- /** In this test we create a v2 legacy HS stream and a circuit with the same
- * hidden service destination. We make the stream wait for circuits to be
- * established to the hidden service, and then we complete the circuit using
- * the hs_circuit_setup_e2e_rend_circ_legacy_client() function. We then
- * check that the end-to-end cpath was setup correctly and that the stream
- * was attached to the circuit as expected. */
- MOCK(connection_ap_handshake_send_begin,
- mock_connection_ap_handshake_send_begin);
- /* Setup */
- retval = helper_get_circ_and_stream_for_test( &or_circ, &conn, 1);
- tt_int_op(retval, OP_EQ, 0);
- tt_assert(or_circ);
- tt_assert(conn);
- /* Check number of hops */
- retval = cpath_get_n_hops(&or_circ->cpath);
- tt_int_op(retval, OP_EQ, 0);
- /* Check that our stream is not attached on any circuits */
- tt_ptr_op(TO_EDGE_CONN(conn)->on_circuit, OP_EQ, NULL);
- /********************************************** */
- /* Make a good RENDEZVOUS1 cell body because it needs to pass key exchange
- * digest verification... */
- uint8_t rend_cell_body[DH1024_KEY_LEN+DIGEST_LEN] = {2};
- {
- char keys[DIGEST_LEN+CPATH_KEY_MATERIAL_LEN];
- crypto_dh_t *dh_state =
- or_circ->build_state->pending_final_cpath->rend_dh_handshake_state;
- /* compute and overwrite digest of cell body with the right value */
- retval = crypto_dh_compute_secret(LOG_PROTOCOL_WARN, dh_state,
- (char*)rend_cell_body, DH1024_KEY_LEN,
- keys, DIGEST_LEN+CPATH_KEY_MATERIAL_LEN);
- tt_int_op(retval, OP_GT, 0);
- memcpy(rend_cell_body+DH1024_KEY_LEN, keys, DIGEST_LEN);
- }
- /* Setup the circuit */
- retval = hs_circuit_setup_e2e_rend_circ_legacy_client(or_circ,
- rend_cell_body);
- tt_int_op(retval, OP_EQ, 0);
- /**********************************************/
- /* See that a hop was added to the circuit's cpath */
- retval = cpath_get_n_hops(&or_circ->cpath);
- tt_int_op(retval, OP_EQ, 1);
- /* Check the digest algo */
- tt_int_op(crypto_digest_get_algorithm(or_circ->cpath->crypto.f_digest),
- OP_EQ, DIGEST_SHA1);
- tt_int_op(crypto_digest_get_algorithm(or_circ->cpath->crypto.b_digest),
- OP_EQ, DIGEST_SHA1);
- tt_assert(or_circ->cpath->crypto.f_crypto);
- tt_assert(or_circ->cpath->crypto.b_crypto);
- /* Ensure that circ purpose was changed */
- tt_int_op(or_circ->base_.purpose, OP_EQ, CIRCUIT_PURPOSE_C_REND_JOINED);
- /* Test that stream got attached */
- tt_ptr_op(TO_EDGE_CONN(conn)->on_circuit, OP_EQ, TO_CIRCUIT(or_circ));
- done:
- connection_free_minimal(conn);
- if (or_circ)
- tor_free(TO_CIRCUIT(or_circ)->n_chan);
- circuit_free_(TO_CIRCUIT(or_circ));
- }
- /* Test: Ensure that setting up v3 rendezvous circuits works correctly. */
- static void
- test_e2e_rend_circuit_setup(void *arg)
- {
- uint8_t ntor_key_seed[DIGEST256_LEN] = {0};
- origin_circuit_t *or_circ = NULL;
- int retval;
- connection_t *conn = NULL;
- (void) arg;
- /** In this test we create a prop224 v3 HS stream and a circuit with the same
- * hidden service destination. We make the stream wait for circuits to be
- * established to the hidden service, and then we complete the circuit using
- * the hs_circuit_setup_e2e_rend_circ() function. We then check that the
- * end-to-end cpath was setup correctly and that the stream was attached to
- * the circuit as expected. */
- MOCK(connection_ap_handshake_send_begin,
- mock_connection_ap_handshake_send_begin);
- /* Setup */
- retval = helper_get_circ_and_stream_for_test( &or_circ, &conn, 0);
- tt_int_op(retval, OP_EQ, 0);
- tt_assert(or_circ);
- tt_assert(conn);
- /* Check number of hops: There should be no hops yet to this circ */
- retval = cpath_get_n_hops(&or_circ->cpath);
- tt_int_op(retval, OP_EQ, 0);
- tt_ptr_op(or_circ->cpath, OP_EQ, NULL);
- /* Check that our stream is not attached on any circuits */
- tt_ptr_op(TO_EDGE_CONN(conn)->on_circuit, OP_EQ, NULL);
- /**********************************************/
- /* Setup the circuit */
- retval = hs_circuit_setup_e2e_rend_circ(or_circ,
- ntor_key_seed, sizeof(ntor_key_seed),
- 0);
- tt_int_op(retval, OP_EQ, 0);
- /**********************************************/
- /* See that a hop was added to the circuit's cpath */
- retval = cpath_get_n_hops(&or_circ->cpath);
- tt_int_op(retval, OP_EQ, 1);
- /* Check that the crypt path has prop224 algorithm parameters */
- tt_int_op(crypto_digest_get_algorithm(or_circ->cpath->crypto.f_digest),
- OP_EQ, DIGEST_SHA3_256);
- tt_int_op(crypto_digest_get_algorithm(or_circ->cpath->crypto.b_digest),
- OP_EQ, DIGEST_SHA3_256);
- tt_assert(or_circ->cpath->crypto.f_crypto);
- tt_assert(or_circ->cpath->crypto.b_crypto);
- /* Ensure that circ purpose was changed */
- tt_int_op(or_circ->base_.purpose, OP_EQ, CIRCUIT_PURPOSE_C_REND_JOINED);
- /* Test that stream got attached */
- tt_ptr_op(TO_EDGE_CONN(conn)->on_circuit, OP_EQ, TO_CIRCUIT(or_circ));
- done:
- connection_free_minimal(conn);
- if (or_circ)
- tor_free(TO_CIRCUIT(or_circ)->n_chan);
- circuit_free_(TO_CIRCUIT(or_circ));
- }
- /** Test client logic for picking intro points from a descriptor. Also test how
- * ExcludeNodes and intro point failures affect picking intro points. */
- static void
- test_client_pick_intro(void *arg)
- {
- int ret;
- ed25519_keypair_t service_kp;
- hs_descriptor_t *desc = NULL;
- MOCK(networkstatus_get_live_consensus,
- mock_networkstatus_get_live_consensus);
- (void) arg;
- hs_init();
- /* Generate service keypair */
- tt_int_op(0, OP_EQ, ed25519_keypair_generate(&service_kp, 0));
- /* Set time */
- ret = parse_rfc1123_time("Sat, 26 Oct 1985 13:00:00 UTC",
- &mock_ns.valid_after);
- tt_int_op(ret, OP_EQ, 0);
- ret = parse_rfc1123_time("Sat, 26 Oct 1985 14:00:00 UTC",
- &mock_ns.fresh_until);
- tt_int_op(ret, OP_EQ, 0);
- update_approx_time(mock_ns.fresh_until-10);
- time_t now = approx_time();
- /* Test logic:
- *
- * 1) Add our desc with intro points to the HS cache.
- *
- * 2) Mark all descriptor intro points except _the chosen one_ as
- * failed. Then query the desc to get a random intro: check that we got
- * _the chosen one_. Then fail the chosen one as well, and see that no
- * intros are returned.
- *
- * 3) Then clean the intro state cache and get an intro point.
- *
- * 4) Try fetching an intro with the wrong service key: shouldn't work
- *
- * 5) Set StrictNodes and put all our intro points in ExcludeNodes: see that
- * nothing is returned.
- */
- /* 1) Add desc to HS cache */
- {
- char *encoded = NULL;
- desc = hs_helper_build_hs_desc_with_ip(&service_kp);
- ret = hs_desc_encode_descriptor(desc, &service_kp, &encoded);
- tt_int_op(ret, OP_EQ, 0);
- tt_assert(encoded);
- /* store it */
- hs_cache_store_as_client(encoded, &service_kp.pubkey);
- /* fetch it to make sure it works */
- const hs_descriptor_t *fetched_desc =
- hs_cache_lookup_as_client(&service_kp.pubkey);
- tt_assert(fetched_desc);
- tt_mem_op(fetched_desc->subcredential, OP_EQ, desc->subcredential,
- DIGEST256_LEN);
- tt_assert(!tor_mem_is_zero((char*)fetched_desc->subcredential,
- DIGEST256_LEN));
- tor_free(encoded);
- }
- /* 2) Mark all intro points except _the chosen one_ as failed. Then query the
- * desc and get a random intro: check that we got _the chosen one_. */
- {
- /* Pick the chosen intro point and get its ei */
- hs_desc_intro_point_t *chosen_intro_point =
- smartlist_get(desc->encrypted_data.intro_points, 0);
- extend_info_t *chosen_intro_ei =
- desc_intro_point_to_extend_info(chosen_intro_point);
- tt_assert(chosen_intro_point);
- tt_assert(chosen_intro_ei);
- /* Now mark all other intro points as failed */
- SMARTLIST_FOREACH_BEGIN(desc->encrypted_data.intro_points,
- hs_desc_intro_point_t *, ip) {
- /* Skip the chosen intro point */
- if (ip == chosen_intro_point) {
- continue;
- }
- ed25519_public_key_t *intro_auth_key = &ip->auth_key_cert->signed_key;
- hs_cache_client_intro_state_note(&service_kp.pubkey,
- intro_auth_key,
- INTRO_POINT_FAILURE_GENERIC);
- } SMARTLIST_FOREACH_END(ip);
- /* Try to get a random intro: Should return the chosen one! */
- /* (We try several times, to make sure this behavior is consistent, and to
- * cover the different cases of client_get_random_intro().) */
- for (int i = 0; i < 64; ++i) {
- extend_info_t *ip = client_get_random_intro(&service_kp.pubkey);
- tor_assert(ip);
- tt_assert(!tor_mem_is_zero((char*)ip->identity_digest, DIGEST_LEN));
- tt_mem_op(ip->identity_digest, OP_EQ, chosen_intro_ei->identity_digest,
- DIGEST_LEN);
- extend_info_free(ip);
- }
- extend_info_free(chosen_intro_ei);
- /* Now also mark the chosen one as failed: See that we can't get any intro
- points anymore. */
- hs_cache_client_intro_state_note(&service_kp.pubkey,
- &chosen_intro_point->auth_key_cert->signed_key,
- INTRO_POINT_FAILURE_TIMEOUT);
- extend_info_t *ip = client_get_random_intro(&service_kp.pubkey);
- tor_assert(!ip);
- }
- /* 3) Clean the intro state cache and get an intro point */
- {
- /* Pretend we are 5 mins in the future and order a cleanup of the intro
- * state. This should clean up the intro point failures and allow us to get
- * an intro. */
- hs_cache_client_intro_state_clean(now + 5*60);
- /* Get an intro. It should work! */
- extend_info_t *ip = client_get_random_intro(&service_kp.pubkey);
- tor_assert(ip);
- extend_info_free(ip);
- }
- /* 4) Try fetching an intro with the wrong service key: shouldn't work */
- {
- ed25519_keypair_t dummy_kp;
- tt_int_op(0, OP_EQ, ed25519_keypair_generate(&dummy_kp, 0));
- extend_info_t *ip = client_get_random_intro(&dummy_kp.pubkey);
- tor_assert(!ip);
- }
- /* 5) Set StrictNodes and put all our intro points in ExcludeNodes: see that
- * nothing is returned. */
- {
- get_options_mutable()->ExcludeNodes = routerset_new();
- get_options_mutable()->StrictNodes = 1;
- SMARTLIST_FOREACH_BEGIN(desc->encrypted_data.intro_points,
- hs_desc_intro_point_t *, ip) {
- extend_info_t *intro_ei = desc_intro_point_to_extend_info(ip);
- if (intro_ei) {
- const char *ptr;
- char ip_addr[TOR_ADDR_BUF_LEN];
- /* We need to decorate in case it is an IPv6 else routerset_parse()
- * doesn't like it. */
- ptr = tor_addr_to_str(ip_addr, &intro_ei->addr, sizeof(ip_addr), 1);
- tt_assert(ptr == ip_addr);
- ret = routerset_parse(get_options_mutable()->ExcludeNodes,
- ip_addr, "");
- tt_int_op(ret, OP_EQ, 0);
- extend_info_free(intro_ei);
- }
- } SMARTLIST_FOREACH_END(ip);
- extend_info_t *ip = client_get_random_intro(&service_kp.pubkey);
- tt_assert(!ip);
- }
- done:
- hs_descriptor_free(desc);
- }
- static int
- mock_router_have_minimum_dir_info_false(void)
- {
- return 0;
- }
- static int
- mock_router_have_minimum_dir_info_true(void)
- {
- return 1;
- }
- static hs_client_fetch_status_t
- mock_fetch_v3_desc_error(const ed25519_public_key_t *key)
- {
- (void) key;
- return HS_CLIENT_FETCH_ERROR;
- }
- static void
- mock_connection_mark_unattached_ap_(entry_connection_t *conn, int endreason,
- int line, const char *file)
- {
- (void) line;
- (void) file;
- conn->edge_.end_reason = endreason;
- }
- static void
- test_descriptor_fetch(void *arg)
- {
- int ret;
- entry_connection_t *ec = NULL;
- ed25519_public_key_t service_pk;
- ed25519_secret_key_t service_sk;
- (void) arg;
- hs_init();
- memset(&service_sk, 'A', sizeof(service_sk));
- ret = ed25519_public_key_generate(&service_pk, &service_sk);
- tt_int_op(ret, OP_EQ, 0);
- /* Initialize this so get_voting_interval() doesn't freak out. */
- ret = parse_rfc1123_time("Sat, 26 Oct 1985 13:00:00 UTC",
- &mock_ns.valid_after);
- tt_int_op(ret, OP_EQ, 0);
- ret = parse_rfc1123_time("Sat, 26 Oct 1985 14:00:00 UTC",
- &mock_ns.fresh_until);
- tt_int_op(ret, OP_EQ, 0);
- ec = entry_connection_new(CONN_TYPE_AP, AF_INET);
- tt_assert(ec);
- ENTRY_TO_EDGE_CONN(ec)->hs_ident = hs_ident_edge_conn_new(&service_pk);
- tt_assert(ENTRY_TO_EDGE_CONN(ec)->hs_ident);
- TO_CONN(ENTRY_TO_EDGE_CONN(ec))->state = AP_CONN_STATE_RENDDESC_WAIT;
- smartlist_add(get_connection_array(), &ec->edge_.base_);
- /* 1. FetchHidServDescriptors is false so we shouldn't be able to fetch. */
- get_options_mutable()->FetchHidServDescriptors = 0;
- ret = hs_client_refetch_hsdesc(&service_pk);
- tt_int_op(ret, OP_EQ, HS_CLIENT_FETCH_NOT_ALLOWED);
- get_options_mutable()->FetchHidServDescriptors = 1;
- /* 2. We don't have a live consensus. */
- MOCK(networkstatus_get_live_consensus,
- mock_networkstatus_get_live_consensus_false);
- ret = hs_client_refetch_hsdesc(&service_pk);
- UNMOCK(networkstatus_get_live_consensus);
- tt_int_op(ret, OP_EQ, HS_CLIENT_FETCH_MISSING_INFO);
- /* From now on, return a live consensus. */
- MOCK(networkstatus_get_live_consensus,
- mock_networkstatus_get_live_consensus);
- /* 3. Not enough dir information. */
- MOCK(router_have_minimum_dir_info,
- mock_router_have_minimum_dir_info_false);
- ret = hs_client_refetch_hsdesc(&service_pk);
- UNMOCK(router_have_minimum_dir_info);
- tt_int_op(ret, OP_EQ, HS_CLIENT_FETCH_MISSING_INFO);
- /* From now on, we do have enough directory information. */
- MOCK(router_have_minimum_dir_info,
- mock_router_have_minimum_dir_info_true);
- /* 4. We do have a pending directory request. */
- {
- dir_connection_t *dir_conn = dir_connection_new(AF_INET);
- dir_conn->hs_ident = tor_malloc_zero(sizeof(hs_ident_dir_conn_t));
- TO_CONN(dir_conn)->purpose = DIR_PURPOSE_FETCH_HSDESC;
- ed25519_pubkey_copy(&dir_conn->hs_ident->identity_pk, &service_pk);
- smartlist_add(get_connection_array(), TO_CONN(dir_conn));
- ret = hs_client_refetch_hsdesc(&service_pk);
- smartlist_remove(get_connection_array(), TO_CONN(dir_conn));
- connection_free_minimal(TO_CONN(dir_conn));
- tt_int_op(ret, OP_EQ, HS_CLIENT_FETCH_PENDING);
- }
- /* 5. We'll trigger an error on the fetch_desc_v3 and force to close all
- * pending SOCKS request. */
- MOCK(router_have_minimum_dir_info,
- mock_router_have_minimum_dir_info_true);
- MOCK(fetch_v3_desc, mock_fetch_v3_desc_error);
- MOCK(connection_mark_unattached_ap_,
- mock_connection_mark_unattached_ap_);
- ret = hs_client_refetch_hsdesc(&service_pk);
- UNMOCK(fetch_v3_desc);
- UNMOCK(connection_mark_unattached_ap_);
- tt_int_op(ret, OP_EQ, HS_CLIENT_FETCH_ERROR);
- /* The close waiting for descriptor function has been called. */
- tt_int_op(ec->edge_.end_reason, OP_EQ, END_STREAM_REASON_RESOLVEFAILED);
- done:
- connection_free_minimal(ENTRY_TO_CONN(ec));
- UNMOCK(networkstatus_get_live_consensus);
- UNMOCK(router_have_minimum_dir_info);
- hs_free_all();
- }
- struct testcase_t hs_client_tests[] = {
- { "e2e_rend_circuit_setup_legacy", test_e2e_rend_circuit_setup_legacy,
- TT_FORK, NULL, NULL },
- { "e2e_rend_circuit_setup", test_e2e_rend_circuit_setup,
- TT_FORK, NULL, NULL },
- { "client_pick_intro", test_client_pick_intro,
- TT_FORK, NULL, NULL },
- { "descriptor_fetch", test_descriptor_fetch,
- TT_FORK, NULL, NULL },
- END_OF_TESTCASES
- };
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