test_hs_service.c 57.9 KB
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/* Copyright (c) 2016-2017, The Tor Project, Inc. */
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/* See LICENSE for licensing information */

/**
 * \file test_hs_service.c
 * \brief Test hidden service functionality.
 */

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#define CIRCUITBUILD_PRIVATE
#define CIRCUITLIST_PRIVATE
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#define CONFIG_PRIVATE
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#define CONNECTION_PRIVATE
#define CRYPTO_PRIVATE
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#define HS_COMMON_PRIVATE
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#define HS_SERVICE_PRIVATE
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#define HS_INTROPOINT_PRIVATE
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#define HS_CIRCUIT_PRIVATE
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#define MAIN_PRIVATE
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#define NETWORKSTATUS_PRIVATE
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#define STATEFILE_PRIVATE
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#define TOR_CHANNEL_INTERNAL_
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#define HS_CLIENT_PRIVATE
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#define ROUTERPARSE_PRIVATE
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#include "test.h"
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#include "test_helpers.h"
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#include "log_test_helpers.h"
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#include "rend_test_helpers.h"
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#include "hs_test_helpers.h"
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#include "or.h"
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#include "config.h"
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#include "circuitbuild.h"
#include "circuitlist.h"
#include "circuituse.h"
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#include "crypto_rand.h"
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#include "dirauth/dirvote.h"
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#include "networkstatus.h"
#include "nodelist.h"
#include "relay.h"
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#include "routerparse.h"
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#include "hs_common.h"
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#include "hs_config.h"
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#include "hs_ident.h"
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#include "hs_intropoint.h"
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#include "hs_ntor.h"
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#include "hs_circuit.h"
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#include "hs_service.h"
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#include "hs_client.h"
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#include "main.h"
#include "rendservice.h"
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#include "statefile.h"
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#include "dirauth/shared_random_state.h"
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#include "voting_schedule.h"
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/* Trunnel */
#include "hs/cell_establish_intro.h"

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static networkstatus_t mock_ns;

static networkstatus_t *
mock_networkstatus_get_live_consensus(time_t now)
{
  (void) now;
  return &mock_ns;
}

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static or_state_t *dummy_state = NULL;

/* Mock function to get fake or state (used for rev counters) */
static or_state_t *
get_or_state_replacement(void)
{
  return dummy_state;
}

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/* Mock function because we are not trying to test the close circuit that does
 * an awful lot of checks on the circuit object. */
static void
mock_circuit_mark_for_close(circuit_t *circ, int reason, int line,
                            const char *file)
{
  (void) circ;
  (void) reason;
  (void) line;
  (void) file;
  return;
}

static int
mock_relay_send_command_from_edge(streamid_t stream_id, circuit_t *circ,
                                  uint8_t relay_command, const char *payload,
                                  size_t payload_len,
                                  crypt_path_t *cpath_layer,
                                  const char *filename, int lineno)
{
  (void) stream_id;
  (void) circ;
  (void) relay_command;
  (void) payload;
  (void) payload_len;
  (void) cpath_layer;
  (void) filename;
  (void) lineno;
  return 0;
}

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/* Helper: from a set of options in conf, configure a service which will add
 * it to the staging list of the HS subsytem. */
static int
helper_config_service(const char *conf)
{
  int ret = 0;
  or_options_t *options = NULL;
  tt_assert(conf);
  options = helper_parse_options(conf);
  tt_assert(options);
  ret = hs_config_service_all(options, 0);
 done:
  or_options_free(options);
  return ret;
}

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/* Test: Ensure that setting up rendezvous circuits works correctly. */
static void
test_e2e_rend_circuit_setup(void *arg)
{
  ed25519_public_key_t service_pk;
  origin_circuit_t *or_circ;
  int retval;

  /** In this test we create a v3 prop224 service-side rendezvous circuit.
   *  We simulate an HS ntor key exchange with a client, and check that
   *  the circuit was setup correctly and is ready to accept rendezvous data */

  (void) arg;

  /* Now make dummy circuit */
  {
    or_circ = origin_circuit_new();

    or_circ->base_.purpose = CIRCUIT_PURPOSE_S_CONNECT_REND;

    or_circ->build_state = tor_malloc_zero(sizeof(cpath_build_state_t));
    or_circ->build_state->is_internal = 1;

    /* 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));

    or_circ->hs_ident = hs_ident_circuit_new(&service_pk,
                                             HS_IDENT_CIRCUIT_RENDEZVOUS);

    TO_CIRCUIT(or_circ)->state = CIRCUIT_STATE_OPEN;
  }

  /* Check number of hops */
  retval = cpath_get_n_hops(&or_circ->cpath);
  tt_int_op(retval, OP_EQ, 0);

  /* Setup the circuit: do the ntor key exchange */
  {
    uint8_t ntor_key_seed[DIGEST256_LEN] = {2};
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    retval = hs_circuit_setup_e2e_rend_circ(or_circ,
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                                       ntor_key_seed, sizeof(ntor_key_seed),
                                       1);
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    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 */
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  tt_int_op(crypto_digest_get_algorithm(or_circ->cpath->crypto.f_digest),
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            OP_EQ, DIGEST_SHA3_256);
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  tt_int_op(crypto_digest_get_algorithm(or_circ->cpath->crypto.b_digest),
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            OP_EQ, DIGEST_SHA3_256);
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  tt_assert(or_circ->cpath->crypto.f_crypto);
  tt_assert(or_circ->cpath->crypto.b_crypto);
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  /* Ensure that circ purpose was changed */
  tt_int_op(or_circ->base_.purpose, OP_EQ, CIRCUIT_PURPOSE_S_REND_JOINED);

 done:
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  circuit_free_(TO_CIRCUIT(or_circ));
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}

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/* Helper: Return a newly allocated and initialized origin circuit with
 * purpose and flags. A default HS identifier is set to an ed25519
 * authentication key for introduction point. */
static origin_circuit_t *
helper_create_origin_circuit(int purpose, int flags)
{
  origin_circuit_t *circ = NULL;

  circ = origin_circuit_init(purpose, flags);
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  tor_assert(circ);
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  circ->cpath = tor_malloc_zero(sizeof(crypt_path_t));
  circ->cpath->magic = CRYPT_PATH_MAGIC;
  circ->cpath->state = CPATH_STATE_OPEN;
  circ->cpath->package_window = circuit_initial_package_window();
  circ->cpath->deliver_window = CIRCWINDOW_START;
  circ->cpath->prev = circ->cpath;
  /* Random nonce. */
  crypto_rand(circ->cpath->prev->rend_circ_nonce, DIGEST_LEN);
  /* Create a default HS identifier. */
  circ->hs_ident = tor_malloc_zero(sizeof(hs_ident_circuit_t));

  return circ;
}

/* Helper: Return a newly allocated service object with the identity keypair
 * sets and the current descriptor. Then register it to the global map.
 * Caller should us hs_free_all() to free this service or remove it from the
 * global map before freeing. */
static hs_service_t *
helper_create_service(void)
{
  /* Set a service for this circuit. */
  hs_service_t *service = hs_service_new(get_options());
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  tor_assert(service);
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  service->config.version = HS_VERSION_THREE;
  ed25519_secret_key_generate(&service->keys.identity_sk, 0);
  ed25519_public_key_generate(&service->keys.identity_pk,
                              &service->keys.identity_sk);
  service->desc_current = service_descriptor_new();
  tt_assert(service->desc_current);
  /* Register service to global map. */
  int ret = register_service(get_hs_service_map(), service);
  tt_int_op(ret, OP_EQ, 0);

 done:
  return service;
}

/* Helper: Return a newly allocated service intro point with two link
 * specifiers, one IPv4 and one legacy ID set to As. */
static hs_service_intro_point_t *
helper_create_service_ip(void)
{
  hs_desc_link_specifier_t *ls;
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  hs_service_intro_point_t *ip = service_intro_point_new(NULL, 0, 0);
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  tor_assert(ip);
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  /* Add a first unused link specifier. */
  ls = tor_malloc_zero(sizeof(*ls));
  ls->type = LS_IPV4;
  smartlist_add(ip->base.link_specifiers, ls);
  /* Add a second link specifier used by a test. */
  ls = tor_malloc_zero(sizeof(*ls));
  ls->type = LS_LEGACY_ID;
  memset(ls->u.legacy_id, 'A', sizeof(ls->u.legacy_id));
  smartlist_add(ip->base.link_specifiers, ls);

  return ip;
}

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static void
test_load_keys(void *arg)
{
  int ret;
  char *conf = NULL;
  char *hsdir_v2 = tor_strdup(get_fname("hs2"));
  char *hsdir_v3 = tor_strdup(get_fname("hs3"));
  char addr[HS_SERVICE_ADDR_LEN_BASE32 + 1];

  (void) arg;

  /* We'll register two services, a v2 and a v3, then we'll load keys and
   * validate that both are in a correct state. */

  hs_init();

#define conf_fmt \
  "HiddenServiceDir %s\n" \
  "HiddenServiceVersion %d\n" \
  "HiddenServicePort 65535\n"

  /* v2 service. */
  tor_asprintf(&conf, conf_fmt, hsdir_v2, HS_VERSION_TWO);
  ret = helper_config_service(conf);
  tor_free(conf);
  tt_int_op(ret, OP_EQ, 0);
  /* This one should now be registered into the v2 list. */
  tt_int_op(get_hs_service_staging_list_size(), OP_EQ, 0);
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  tt_int_op(rend_num_services(), OP_EQ, 1);
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  /* v3 service. */
  tor_asprintf(&conf, conf_fmt, hsdir_v3, HS_VERSION_THREE);
  ret = helper_config_service(conf);
  tor_free(conf);
  tt_int_op(ret, OP_EQ, 0);
  /* It's in staging? */
  tt_int_op(get_hs_service_staging_list_size(), OP_EQ, 1);

  /* Load the keys for these. After that, the v3 service should be registered
   * in the global map. */
  hs_service_load_all_keys();
  tt_int_op(get_hs_service_map_size(), OP_EQ, 1);
  hs_service_t *s = get_first_service();
  tt_assert(s);

  /* Ok we have the service object. Validate few things. */
  tt_assert(!tor_mem_is_zero(s->onion_address, sizeof(s->onion_address)));
  tt_int_op(hs_address_is_valid(s->onion_address), OP_EQ, 1);
  tt_assert(!tor_mem_is_zero((char *) s->keys.identity_sk.seckey,
                             ED25519_SECKEY_LEN));
  tt_assert(!tor_mem_is_zero((char *) s->keys.identity_pk.pubkey,
                             ED25519_PUBKEY_LEN));
  /* Check onion address from identity key. */
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  hs_build_address(&s->keys.identity_pk, s->config.version, addr);
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  tt_int_op(hs_address_is_valid(addr), OP_EQ, 1);
  tt_str_op(addr, OP_EQ, s->onion_address);

 done:
  tor_free(hsdir_v2);
  tor_free(hsdir_v3);
  hs_free_all();
}

static void
test_access_service(void *arg)
{
  int ret;
  char *conf = NULL;
  char *hsdir_v3 = tor_strdup(get_fname("hs3"));
  hs_service_ht *global_map;
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  hs_service_t *s = NULL;
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  (void) arg;

  /* We'll register two services, a v2 and a v3, then we'll load keys and
   * validate that both are in a correct state. */

  hs_init();

#define conf_fmt \
  "HiddenServiceDir %s\n" \
  "HiddenServiceVersion %d\n" \
  "HiddenServicePort 65535\n"

  /* v3 service. */
  tor_asprintf(&conf, conf_fmt, hsdir_v3, HS_VERSION_THREE);
  ret = helper_config_service(conf);
  tor_free(conf);
  tt_int_op(ret, OP_EQ, 0);
  /* It's in staging? */
  tt_int_op(get_hs_service_staging_list_size(), OP_EQ, 1);

  /* Load the keys for these. After that, the v3 service should be registered
   * in the global map. */
  hs_service_load_all_keys();
  tt_int_op(get_hs_service_map_size(), OP_EQ, 1);
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  s = get_first_service();
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  tt_assert(s);
  global_map = get_hs_service_map();
  tt_assert(global_map);

  /* From here, we'll try the service accessors. */
  hs_service_t *query = find_service(global_map, &s->keys.identity_pk);
  tt_assert(query);
  tt_mem_op(query, OP_EQ, s, sizeof(hs_service_t));
  /* Remove service, check if it actually works and then put it back. */
  remove_service(global_map, s);
  tt_int_op(get_hs_service_map_size(), OP_EQ, 0);
  query = find_service(global_map, &s->keys.identity_pk);
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  tt_ptr_op(query, OP_EQ, NULL);
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  /* Register back the service in the map. */
  ret = register_service(global_map, s);
  tt_int_op(ret, OP_EQ, 0);
  tt_int_op(get_hs_service_map_size(), OP_EQ, 1);
  /* Twice should fail. */
  ret = register_service(global_map, s);
  tt_int_op(ret, OP_EQ, -1);
  /* Remove service from map so we don't double free on cleanup. */
  remove_service(global_map, s);
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  tt_int_op(get_hs_service_map_size(), OP_EQ, 0);
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  query = find_service(global_map, &s->keys.identity_pk);
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  tt_ptr_op(query, OP_EQ, NULL);
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  /* Let's try to remove twice for fun. */
  setup_full_capture_of_logs(LOG_WARN);
  remove_service(global_map, s);
  expect_log_msg_containing("Could not find service in the global map");
  teardown_capture_of_logs();

 done:
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  hs_service_free(s);
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  tor_free(hsdir_v3);
  hs_free_all();
}

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/** Test that we can create intro point objects, index them and find them */
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static void
test_service_intro_point(void *arg)
{
  hs_service_t *service = NULL;
  hs_service_intro_point_t *ip = NULL;

  (void) arg;

  /* Test simple creation of an object. */
  {
    time_t now = time(NULL);
    ip = helper_create_service_ip();
    tt_assert(ip);
    /* Make sure the authentication keypair is not zeroes. */
    tt_int_op(tor_mem_is_zero((const char *) &ip->auth_key_kp,
                              sizeof(ed25519_keypair_t)), OP_EQ, 0);
    /* The introduce2_max MUST be in that range. */
    tt_u64_op(ip->introduce2_max, OP_GE,
              INTRO_POINT_MIN_LIFETIME_INTRODUCTIONS);
    tt_u64_op(ip->introduce2_max, OP_LE,
              INTRO_POINT_MAX_LIFETIME_INTRODUCTIONS);
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    /* Time to expire MUST also be in that range. We subtract 500 seconds
     * because there could be a gap between setting now and the time taken in
     * service_intro_point_new. On ARM and other older CPUs, it can be
     * surprisingly slow... */
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    tt_u64_op(ip->time_to_expire, OP_GE,
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              now + INTRO_POINT_LIFETIME_MIN_SECONDS - 500);
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    /* We add 500 seconds, because this time we're testing against the
     * maximum allowed time. */
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    tt_u64_op(ip->time_to_expire, OP_LE,
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              now + INTRO_POINT_LIFETIME_MAX_SECONDS + 500);
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    tt_assert(ip->replay_cache);
    tt_assert(ip->base.link_specifiers);
    /* By default, this is NOT a legacy object. */
    tt_int_op(ip->base.is_only_legacy, OP_EQ, 0);
  }

  /* Test functions that uses a service intropoints map with that previously
   * created object (non legacy). */
  {
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    ed25519_public_key_t garbage = { {0} };
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    hs_service_intro_point_t *query;

    service = hs_service_new(get_options());
    tt_assert(service);
    service->desc_current = service_descriptor_new();
    tt_assert(service->desc_current);
    /* Add intropoint to descriptor map. */
    service_intro_point_add(service->desc_current->intro_points.map, ip);
    query = service_intro_point_find(service, &ip->auth_key_kp.pubkey);
    tt_mem_op(query, OP_EQ, ip, sizeof(hs_service_intro_point_t));
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    query = service_intro_point_find(service, &garbage);
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    tt_ptr_op(query, OP_EQ, NULL);
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    /* While at it, can I find the descriptor with the intro point? */
    hs_service_descriptor_t *desc_lookup =
      service_desc_find_by_intro(service, ip);
    tt_mem_op(service->desc_current, OP_EQ, desc_lookup,
              sizeof(hs_service_descriptor_t));

    /* Remove object from service descriptor and make sure it is out. */
    service_intro_point_remove(service, ip);
    query = service_intro_point_find(service, &ip->auth_key_kp.pubkey);
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    tt_ptr_op(query, OP_EQ, NULL);
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  }

 done:
  /* If the test succeed, this object is no longer referenced in the service
   * so we can free it without use after free. Else, it might explode because
   * it's still in the service descriptor map. */
  service_intro_point_free(ip);
  hs_service_free(service);
}

static node_t mock_node;
static const node_t *
mock_node_get_by_id(const char *digest)
{
  (void) digest;
  memset(mock_node.identity, 'A', DIGEST_LEN);
  /* Only return the matchin identity of As */
  if (!tor_memcmp(mock_node.identity, digest, DIGEST_LEN)) {
    return &mock_node;
  }
  return NULL;
}

static void
test_helper_functions(void *arg)
{
  int ret;
  hs_service_t *service = NULL;
  hs_service_intro_point_t *ip = NULL;
  hs_ident_circuit_t ident;

  (void) arg;

  MOCK(node_get_by_id, mock_node_get_by_id);

  hs_service_init();
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  time_t now = time(NULL);
  update_approx_time(now);
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  service = helper_create_service();

  ip = helper_create_service_ip();
  /* Immediately add the intro point to the service so the free service at the
   * end cleans it as well. */
  service_intro_point_add(service->desc_current->intro_points.map, ip);

  /* Setup the circuit identifier. */
  ed25519_pubkey_copy(&ident.intro_auth_pk, &ip->auth_key_kp.pubkey);
  ed25519_pubkey_copy(&ident.identity_pk, &service->keys.identity_pk);

  /* Testing get_objects_from_ident(). */
  {
    hs_service_t *s_lookup = NULL;
    hs_service_intro_point_t *ip_lookup = NULL;
    hs_service_descriptor_t *desc_lookup = NULL;

    get_objects_from_ident(&ident, &s_lookup, &ip_lookup, &desc_lookup);
    tt_mem_op(s_lookup, OP_EQ, service, sizeof(hs_service_t));
    tt_mem_op(ip_lookup, OP_EQ, ip, sizeof(hs_service_intro_point_t));
    tt_mem_op(desc_lookup, OP_EQ, service->desc_current,
              sizeof(hs_service_descriptor_t));
    /* Reset */
    s_lookup = NULL; ip_lookup = NULL; desc_lookup = NULL;

    /* NULL parameter should work. */
    get_objects_from_ident(&ident, NULL, &ip_lookup, &desc_lookup);
    tt_mem_op(ip_lookup, OP_EQ, ip, sizeof(hs_service_intro_point_t));
    tt_mem_op(desc_lookup, OP_EQ, service->desc_current,
              sizeof(hs_service_descriptor_t));
    /* Reset. */
    s_lookup = NULL; ip_lookup = NULL; desc_lookup = NULL;

    /* Break the ident and we should find nothing. */
    memset(&ident, 0, sizeof(ident));
    get_objects_from_ident(&ident, &s_lookup, &ip_lookup, &desc_lookup);
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    tt_ptr_op(s_lookup, OP_EQ, NULL);
    tt_ptr_op(ip_lookup, OP_EQ, NULL);
    tt_ptr_op(desc_lookup, OP_EQ, NULL);
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  }

  /* Testing get_node_from_intro_point() */
  {
    const node_t *node = get_node_from_intro_point(ip);
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    tt_ptr_op(node, OP_EQ, &mock_node);
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    SMARTLIST_FOREACH_BEGIN(ip->base.link_specifiers,
                            hs_desc_link_specifier_t *, ls) {
      if (ls->type == LS_LEGACY_ID) {
        /* Change legacy id in link specifier which is not the mock node. */
        memset(ls->u.legacy_id, 'B', sizeof(ls->u.legacy_id));
      }
    } SMARTLIST_FOREACH_END(ls);
    node = get_node_from_intro_point(ip);
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    tt_ptr_op(node, OP_EQ, NULL);
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  }

  /* Testing can_service_launch_intro_circuit() */
  {
    /* Put the start of the retry period back in time, we should be allowed.
     * to launch intro circuit. */
    service->state.num_intro_circ_launched = 2;
    service->state.intro_circ_retry_started_time =
      (now - INTRO_CIRC_RETRY_PERIOD - 1);
    ret = can_service_launch_intro_circuit(service, now);
    tt_int_op(ret, OP_EQ, 1);
    tt_u64_op(service->state.intro_circ_retry_started_time, OP_EQ, now);
    tt_u64_op(service->state.num_intro_circ_launched, OP_EQ, 0);
    /* Call it again, we should still be allowed because we are under
     * MAX_INTRO_CIRCS_PER_PERIOD which been set to 0 previously. */
    ret = can_service_launch_intro_circuit(service, now);
    tt_int_op(ret, OP_EQ, 1);
    tt_u64_op(service->state.intro_circ_retry_started_time, OP_EQ, now);
    tt_u64_op(service->state.num_intro_circ_launched, OP_EQ, 0);
    /* Too many intro circuit launched means we are not allowed. */
    service->state.num_intro_circ_launched = 20;
    ret = can_service_launch_intro_circuit(service, now);
    tt_int_op(ret, OP_EQ, 0);
  }

  /* Testing intro_point_should_expire(). */
  {
    /* Just some basic test of the current state. */
    tt_u64_op(ip->introduce2_max, OP_GE,
              INTRO_POINT_MIN_LIFETIME_INTRODUCTIONS);
    tt_u64_op(ip->introduce2_max, OP_LE,
              INTRO_POINT_MAX_LIFETIME_INTRODUCTIONS);
    tt_u64_op(ip->time_to_expire, OP_GE,
              now + INTRO_POINT_LIFETIME_MIN_SECONDS);
    tt_u64_op(ip->time_to_expire, OP_LE,
              now + INTRO_POINT_LIFETIME_MAX_SECONDS);

    /* This newly created IP from above shouldn't expire now. */
    ret = intro_point_should_expire(ip, now);
    tt_int_op(ret, OP_EQ, 0);
    /* Maximum number of INTRODUCE2 cell reached, it should expire. */
    ip->introduce2_count = INTRO_POINT_MAX_LIFETIME_INTRODUCTIONS + 1;
    ret = intro_point_should_expire(ip, now);
    tt_int_op(ret, OP_EQ, 1);
    ip->introduce2_count = 0;
    /* It should expire if time to expire has been reached. */
    ip->time_to_expire = now - 1000;
    ret = intro_point_should_expire(ip, now);
    tt_int_op(ret, OP_EQ, 1);
  }

 done:
  /* This will free the service and all objects associated to it. */
  hs_service_free_all();
  UNMOCK(node_get_by_id);
}

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/** Test that we do the right operations when an intro circuit opens */
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static void
test_intro_circuit_opened(void *arg)
{
  int flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL;
  hs_service_t *service;
  origin_circuit_t *circ = NULL;

  (void) arg;

  hs_init();
  MOCK(circuit_mark_for_close_, mock_circuit_mark_for_close);
  MOCK(relay_send_command_from_edge_, mock_relay_send_command_from_edge);

  circ = helper_create_origin_circuit(CIRCUIT_PURPOSE_S_ESTABLISH_INTRO,
                                      flags);

  /* No service associated with this circuit. */
  setup_full_capture_of_logs(LOG_WARN);
  hs_service_circuit_has_opened(circ);
  expect_log_msg_containing("Unknown service identity key");
  teardown_capture_of_logs();

  /* Set a service for this circuit. */
  {
    service = helper_create_service();
    ed25519_pubkey_copy(&circ->hs_ident->identity_pk,
                        &service->keys.identity_pk);

    /* No intro point associated with this circuit. */
    setup_full_capture_of_logs(LOG_WARN);
    hs_service_circuit_has_opened(circ);
    expect_log_msg_containing("Unknown introduction point auth key");
    teardown_capture_of_logs();
  }

  /* Set an IP object now for this circuit. */
  {
    hs_service_intro_point_t *ip = helper_create_service_ip();
    service_intro_point_add(service->desc_current->intro_points.map, ip);
    /* Update ident to contain the intro point auth key. */
    ed25519_pubkey_copy(&circ->hs_ident->intro_auth_pk,
                        &ip->auth_key_kp.pubkey);
  }

  /* This one should go all the way. */
  setup_full_capture_of_logs(LOG_INFO);
  hs_service_circuit_has_opened(circ);
  expect_log_msg_containing("Introduction circuit 0 established for service");
  teardown_capture_of_logs();

 done:
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  circuit_free_(TO_CIRCUIT(circ));
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  hs_free_all();
  UNMOCK(circuit_mark_for_close_);
  UNMOCK(relay_send_command_from_edge_);
}

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/** Test the operations we do on a circuit after we learn that we successfully
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 *  established an intro point on it */
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static void
test_intro_established(void *arg)
{
  int ret;
  int flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL;
  uint8_t payload[RELAY_PAYLOAD_SIZE] = {0};
  origin_circuit_t *circ = NULL;
  hs_service_t *service;
  hs_service_intro_point_t *ip = NULL;

  (void) arg;

  hs_init();
  MOCK(circuit_mark_for_close_, mock_circuit_mark_for_close);

  circ = helper_create_origin_circuit(CIRCUIT_PURPOSE_S_ESTABLISH_INTRO,
                                      flags);
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  tt_assert(circ);

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  /* Test a wrong purpose. */
  TO_CIRCUIT(circ)->purpose = CIRCUIT_PURPOSE_S_INTRO;
  setup_full_capture_of_logs(LOG_WARN);
  ret = hs_service_receive_intro_established(circ, payload, sizeof(payload));
  tt_int_op(ret, OP_EQ, -1);
  expect_log_msg_containing("Received an INTRO_ESTABLISHED cell on a "
                            "non introduction circuit of purpose");
  teardown_capture_of_logs();

  /* Back to normal. */
  TO_CIRCUIT(circ)->purpose = CIRCUIT_PURPOSE_S_ESTABLISH_INTRO;

  /* No service associated to it. */
  setup_full_capture_of_logs(LOG_WARN);
  ret = hs_service_receive_intro_established(circ, payload, sizeof(payload));
  tt_int_op(ret, OP_EQ, -1);
  expect_log_msg_containing("Unknown service identity key");
  teardown_capture_of_logs();

  /* Set a service for this circuit. */
  service = helper_create_service();
  ed25519_pubkey_copy(&circ->hs_ident->identity_pk,
                      &service->keys.identity_pk);
  /* No introduction point associated to it. */
  setup_full_capture_of_logs(LOG_WARN);
  ret = hs_service_receive_intro_established(circ, payload, sizeof(payload));
  tt_int_op(ret, OP_EQ, -1);
  expect_log_msg_containing("Introduction circuit established without an "
                            "intro point object on circuit");
  teardown_capture_of_logs();

  /* Set an IP object now for this circuit. */
  {
    ip = helper_create_service_ip();
    service_intro_point_add(service->desc_current->intro_points.map, ip);
    /* Update ident to contain the intro point auth key. */
    ed25519_pubkey_copy(&circ->hs_ident->intro_auth_pk,
                        &ip->auth_key_kp.pubkey);
  }

  /* Send an empty payload. INTRO_ESTABLISHED cells are basically zeroes. */
  ret = hs_service_receive_intro_established(circ, payload, sizeof(payload));
  tt_int_op(ret, OP_EQ, 0);
  tt_u64_op(ip->circuit_established, OP_EQ, 1);
  tt_int_op(TO_CIRCUIT(circ)->purpose, OP_EQ, CIRCUIT_PURPOSE_S_INTRO);

 done:
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  if (circ)
736
    circuit_free_(TO_CIRCUIT(circ));
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  hs_free_all();
  UNMOCK(circuit_mark_for_close_);
}

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/** Check the operations we do on a rendezvous circuit after we learn it's
 *  open */
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static void
test_rdv_circuit_opened(void *arg)
{
  int flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL;
  origin_circuit_t *circ = NULL;
  hs_service_t *service;

  (void) arg;

  hs_init();
  MOCK(circuit_mark_for_close_, mock_circuit_mark_for_close);
  MOCK(relay_send_command_from_edge_, mock_relay_send_command_from_edge);

  circ = helper_create_origin_circuit(CIRCUIT_PURPOSE_S_CONNECT_REND, flags);
  crypto_rand((char *) circ->hs_ident->rendezvous_cookie, REND_COOKIE_LEN);
  crypto_rand((char *) circ->hs_ident->rendezvous_handshake_info,
              sizeof(circ->hs_ident->rendezvous_handshake_info));

  /* No service associated with this circuit. */
  setup_full_capture_of_logs(LOG_WARN);
  hs_service_circuit_has_opened(circ);
  expect_log_msg_containing("Unknown service identity key");
  teardown_capture_of_logs();
  /* This should be set to a non zero timestamp. */
  tt_u64_op(TO_CIRCUIT(circ)->timestamp_dirty, OP_NE, 0);

  /* Set a service for this circuit. */
  service = helper_create_service();
  ed25519_pubkey_copy(&circ->hs_ident->identity_pk,
                      &service->keys.identity_pk);
  /* Should be all good. */
  hs_service_circuit_has_opened(circ);
  tt_int_op(TO_CIRCUIT(circ)->purpose, OP_EQ, CIRCUIT_PURPOSE_S_REND_JOINED);

 done:
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  circuit_free_(TO_CIRCUIT(circ));
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  hs_free_all();
  UNMOCK(circuit_mark_for_close_);
  UNMOCK(relay_send_command_from_edge_);
}

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static void
mock_assert_circuit_ok(const circuit_t *c)
{
  (void) c;
  return;
}

/** Test for the general mechanism for closing intro circs.
 *  Also a way to identify that #23603 has been fixed. */
static void
test_closing_intro_circs(void *arg)
{
  hs_service_t *service = NULL;
  hs_service_intro_point_t *ip = NULL, *entry = NULL;
  origin_circuit_t *intro_circ = NULL, *tmp_circ;
  int flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL;

  (void) arg;

  MOCK(assert_circuit_ok, mock_assert_circuit_ok);

  hs_init();

  /* Initialize service */
  service = helper_create_service();
  /* Initialize intro point */
  ip = helper_create_service_ip();
  tt_assert(ip);
  service_intro_point_add(service->desc_current->intro_points.map, ip);

  /* Initialize intro circuit */
  intro_circ = origin_circuit_init(CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, flags);
  intro_circ->hs_ident = hs_ident_circuit_new(&service->keys.identity_pk,
                                              HS_IDENT_CIRCUIT_INTRO);
  /* Register circuit in the circuitmap . */
  hs_circuitmap_register_intro_circ_v3_service_side(intro_circ,
                                                    &ip->auth_key_kp.pubkey);
  tmp_circ =
    hs_circuitmap_get_intro_circ_v3_service_side(&ip->auth_key_kp.pubkey);
  tt_ptr_op(tmp_circ, OP_EQ, intro_circ);

  /* Pretend that intro point has failed too much */
  ip->circuit_retries = MAX_INTRO_POINT_CIRCUIT_RETRIES+1;

  /* Now pretend we are freeing this intro circuit. We want to see that our
   * destructor is not gonna kill our intro point structure since that's the
   * job of the cleanup routine. */
831
  circuit_free_(TO_CIRCUIT(intro_circ));
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  intro_circ = NULL;
  entry = service_intro_point_find(service, &ip->auth_key_kp.pubkey);
  tt_assert(entry);
  /* The free should also remove the circuit from the circuitmap. */
  tmp_circ =
    hs_circuitmap_get_intro_circ_v3_service_side(&ip->auth_key_kp.pubkey);
  tt_assert(!tmp_circ);

  /* Now pretend that a new intro point circ was launched and opened. Check
   * that the intro point will be established correctly. */
  intro_circ = origin_circuit_init(CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, flags);
  intro_circ->hs_ident = hs_ident_circuit_new(&service->keys.identity_pk,
                                              HS_IDENT_CIRCUIT_INTRO);
  ed25519_pubkey_copy(&intro_circ->hs_ident->intro_auth_pk,
                      &ip->auth_key_kp.pubkey);
  /* Register circuit in the circuitmap . */
  hs_circuitmap_register_intro_circ_v3_service_side(intro_circ,
                                                    &ip->auth_key_kp.pubkey);
  tmp_circ =
    hs_circuitmap_get_intro_circ_v3_service_side(&ip->auth_key_kp.pubkey);
  tt_ptr_op(tmp_circ, OP_EQ, intro_circ);
  tt_int_op(TO_CIRCUIT(intro_circ)->marked_for_close, OP_EQ, 0);
  circuit_mark_for_close(TO_CIRCUIT(intro_circ), END_CIRC_REASON_INTERNAL);
  tt_int_op(TO_CIRCUIT(intro_circ)->marked_for_close, OP_NE, 0);
  /* At this point, we should not be able to find it in the circuitmap. */
  tmp_circ =
    hs_circuitmap_get_intro_circ_v3_service_side(&ip->auth_key_kp.pubkey);
  tt_assert(!tmp_circ);

 done:
  if (intro_circ) {
863
    circuit_free_(TO_CIRCUIT(intro_circ));
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  }
  /* Frees the service object. */
  hs_free_all();
  UNMOCK(assert_circuit_ok);
}

870
/** Test sending and receiving introduce2 cells */
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static void
test_introduce2(void *arg)
{
  int ret;
  int flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL;
  uint8_t payload[RELAY_PAYLOAD_SIZE] = {0};
  origin_circuit_t *circ = NULL;
  hs_service_t *service;
  hs_service_intro_point_t *ip = NULL;

  (void) arg;

  hs_init();
  MOCK(circuit_mark_for_close_, mock_circuit_mark_for_close);
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  MOCK(get_or_state,
       get_or_state_replacement);

  dummy_state = tor_malloc_zero(sizeof(or_state_t));
889
890

  circ = helper_create_origin_circuit(CIRCUIT_PURPOSE_S_INTRO, flags);
891
  tt_assert(circ);
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  /* Test a wrong purpose. */
  TO_CIRCUIT(circ)->purpose = CIRCUIT_PURPOSE_S_ESTABLISH_INTRO;
  setup_full_capture_of_logs(LOG_WARN);
  ret = hs_service_receive_introduce2(circ, payload, sizeof(payload));
  tt_int_op(ret, OP_EQ, -1);
  expect_log_msg_containing("Received an INTRODUCE2 cell on a "
                            "non introduction circuit of purpose");
  teardown_capture_of_logs();

  /* Back to normal. */
  TO_CIRCUIT(circ)->purpose = CIRCUIT_PURPOSE_S_INTRO;

  /* No service associated to it. */
  setup_full_capture_of_logs(LOG_WARN);
  ret = hs_service_receive_introduce2(circ, payload, sizeof(payload));
  tt_int_op(ret, OP_EQ, -1);
  expect_log_msg_containing("Unknown service identity key");
  teardown_capture_of_logs();

  /* Set a service for this circuit. */
  service = helper_create_service();
  ed25519_pubkey_copy(&circ->hs_ident->identity_pk,
                      &service->keys.identity_pk);
  /* No introduction point associated to it. */
  setup_full_capture_of_logs(LOG_WARN);
  ret = hs_service_receive_introduce2(circ, payload, sizeof(payload));
  tt_int_op(ret, OP_EQ, -1);
  expect_log_msg_containing("Unknown introduction auth key when handling "
                            "an INTRODUCE2 cell on circuit");
  teardown_capture_of_logs();

  /* Set an IP object now for this circuit. */
  {
    ip = helper_create_service_ip();
    service_intro_point_add(service->desc_current->intro_points.map, ip);
    /* Update ident to contain the intro point auth key. */
    ed25519_pubkey_copy(&circ->hs_ident->intro_auth_pk,
                        &ip->auth_key_kp.pubkey);
  }

  /* This will fail because receiving an INTRODUCE2 cell implies a valid cell
   * and then launching circuits so let's not do that and instead test that
   * behaviour differently. */
  ret = hs_service_receive_introduce2(circ, payload, sizeof(payload));
  tt_int_op(ret, OP_EQ, -1);
  tt_u64_op(ip->introduce2_count, OP_EQ, 0);

 done:
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  or_state_free(dummy_state);
  dummy_state = NULL;
943
  if (circ)
944
    circuit_free_(TO_CIRCUIT(circ));
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  hs_free_all();
  UNMOCK(circuit_mark_for_close_);
}

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/** Test basic hidden service housekeeping operations (maintaining intro
 *  points, etc) */
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static void
test_service_event(void *arg)
{
  int flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL;
  time_t now = time(NULL);
  hs_service_t *service;
  origin_circuit_t *circ = NULL;

  (void) arg;

  hs_init();
  MOCK(circuit_mark_for_close_, mock_circuit_mark_for_close);

  circ = helper_create_origin_circuit(CIRCUIT_PURPOSE_S_INTRO, flags);

  /* Set a service for this circuit. */
  service = helper_create_service();
  ed25519_pubkey_copy(&circ->hs_ident->identity_pk,
                      &service->keys.identity_pk);

  /* Currently this consists of cleaning invalid intro points. So adding IPs
   * here that should get cleaned up. */
  {
    hs_service_intro_point_t *ip = helper_create_service_ip();
    service_intro_point_add(service->desc_current->intro_points.map, ip);
    /* This run will remove the IP because we have no circuits nor node_t
     * associated with it. */
    run_housekeeping_event(now);
    tt_int_op(digest256map_size(service->desc_current->intro_points.map),
              OP_EQ, 0);
    /* We'll trigger a removal because we've reached our maximum amount of
     * times we should retry a circuit. For this, we need to have a node_t
     * that matches the identity of this IP. */
    routerinfo_t ri;
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    memset(&ri, 0, sizeof(ri));
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    ip = helper_create_service_ip();
    service_intro_point_add(service->desc_current->intro_points.map, ip);
    memset(ri.cache_info.identity_digest, 'A', DIGEST_LEN);
    /* This triggers a node_t creation. */
    tt_assert(nodelist_set_routerinfo(&ri, NULL));
    ip->circuit_retries = MAX_INTRO_POINT_CIRCUIT_RETRIES + 1;
    run_housekeeping_event(now);
    tt_int_op(digest256map_size(service->desc_current->intro_points.map),
              OP_EQ, 0);
    /* No removal but no circuit so this means the IP object will stay in the
     * descriptor map so we can retry it. */
    ip = helper_create_service_ip();
    service_intro_point_add(service->desc_current->intro_points.map, ip);
    ip->circuit_established = 1;  /* We'll test that, it MUST be 0 after. */
    run_housekeeping_event(now);