commit a64ef7d6c5f609229c4e6a25f1b18494a3ba6eea Author: David Goulet dgoulet@torproject.org Date: Thu Jul 27 17:15:19 2017 -0400

prop224: Implement hs_client_any_intro_points_usable()

Signed-off-by: David Goulet dgoulet@torproject.org --- src/or/connection_edge.c | 4 +++- src/or/hs_client.c | 34 ++++++++++++++++++++++++---------- src/or/hs_client.h | 3 ++- 3 files changed, 29 insertions(+), 12 deletions(-)

diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c index 3dd08b6d2..6409c5be8 100644 --- a/src/or/connection_edge.c +++ b/src/or/connection_edge.c @@ -1501,7 +1501,9 @@ connection_ap_handle_onion(entry_connection_t *conn, cached_desc = hs_cache_lookup_as_client(&hs_conn_ident->identity_pk); if (cached_desc) { rend_cache_lookup_result = 0; - descriptor_is_usable = hs_client_any_intro_points_usable(cached_desc); + descriptor_is_usable = + hs_client_any_intro_points_usable(&hs_conn_ident->identity_pk, + cached_desc); log_info(LD_GENERAL, "Found %s descriptor in cache for %s. %s.", (descriptor_is_usable) ? "usable" : "unusable", safe_str_client(onion_address), diff --git a/src/or/hs_client.c b/src/or/hs_client.c index 06cbcc409..e7e3eb72a 100644 --- a/src/or/hs_client.c +++ b/src/or/hs_client.c @@ -242,7 +242,8 @@ send_introduce1(origin_circuit_t *intro_circ, /* 1) Get descriptor from our cache. */ const hs_descriptor_t *desc = hs_cache_lookup_as_client(service_identity_pk); - if (desc == NULL || !hs_client_any_intro_points_usable(desc)) { + if (desc == NULL || !hs_client_any_intro_points_usable(service_identity_pk, + desc)) { log_info(LD_REND, "Request to %s %s. Trying to fetch a new descriptor.", safe_str_client(onion_address), (desc) ? "didn't have usable intro points" : @@ -479,7 +480,8 @@ client_get_random_intro(const ed25519_public_key_t *service_pk) tor_assert(service_pk);

desc = hs_cache_lookup_as_client(service_pk); - if (desc == NULL || !hs_client_any_intro_points_usable(desc)) { + if (desc == NULL || !hs_client_any_intro_points_usable(service_pk, + desc)) { log_info(LD_REND, "Unable to randomly select an introduction point " "because descriptor %s.", (desc) ? "doesn't have usable intro point" : "is missing"); @@ -565,7 +567,8 @@ close_or_reextend_intro_circ(origin_circuit_t *intro_circ) } /* We still have the descriptor, great! Let's try to see if we can * re-extend by looking up if there are any usable intro points. */ - if (!hs_client_any_intro_points_usable(desc)) { + if (!hs_client_any_intro_points_usable(&intro_circ->hs_ident->identity_pk, + desc)) { goto close; } /* Try to re-extend now. */ @@ -824,14 +827,24 @@ hs_client_decode_descriptor(const char *desc_str, return -1; }

-/** Return true if there are any usable intro points in the v3 HS descriptor - * <b>desc</b>. */ +/* Return true iff there are at least one usable intro point in the service + * descriptor desc. */ int -hs_client_any_intro_points_usable(const hs_descriptor_t *desc) +hs_client_any_intro_points_usable(const ed25519_public_key_t *service_pk, + const hs_descriptor_t *desc) { - /* XXX stub waiting for more client-side work: - equivalent to v2 rend_client_any_intro_points_usable() */ + tor_assert(service_pk); tor_assert(desc); + + SMARTLIST_FOREACH_BEGIN(desc->encrypted_data.intro_points, + const hs_desc_intro_point_t *, ip) { + if (intro_point_is_usable(service_pk, ip)) { + goto usable; + } + } SMARTLIST_FOREACH_END(ip); + + return 0; + usable: return 1; }

@@ -856,7 +869,8 @@ hs_client_refetch_hsdesc(const ed25519_public_key_t *identity_pk) { const hs_descriptor_t *cached_desc = NULL; cached_desc = hs_cache_lookup_as_client(identity_pk); - if (cached_desc && hs_client_any_intro_points_usable(cached_desc)) { + if (cached_desc && hs_client_any_intro_points_usable(identity_pk, + cached_desc)) { log_warn(LD_GENERAL, "We would fetch a v3 hidden service descriptor " "but we already have a useable descriprot."); return 0; @@ -989,7 +1003,7 @@ hs_client_desc_has_arrived(const hs_ident_dir_conn_t *ident) goto end; }

- if (!hs_client_any_intro_points_usable(desc)) { + if (!hs_client_any_intro_points_usable(&ident->identity_pk, desc)) { log_info(LD_REND, "Hidden service descriptor is unusable. " "Closing streams."); connection_mark_unattached_ap(entry_conn, diff --git a/src/or/hs_client.h b/src/or/hs_client.h index 440698788..8ed0501c9 100644 --- a/src/or/hs_client.h +++ b/src/or/hs_client.h @@ -20,7 +20,8 @@ int hs_client_decode_descriptor( const char *desc_str, const ed25519_public_key_t *service_identity_pk, hs_descriptor_t **desc); -int hs_client_any_intro_points_usable(const hs_descriptor_t *desc); +int hs_client_any_intro_points_usable(const ed25519_public_key_t *service_pk, + const hs_descriptor_t *desc); int hs_client_refetch_hsdesc(const ed25519_public_key_t *identity_pk);

int hs_client_send_introduce1(origin_circuit_t *intro_circ,