August 2019 - tor-commits - lists.torproject.org

[tor/master] rendservice: Always use a 3-hop path when a v2 single onion rend fails
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit dc08f8ac70e95b9a76f86a5e15dfcabd7ada25b9 Author: teor <teor(a)torproject.org> Date: Fri Aug 23 14:38:54 2019 +1000 rendservice: Always use a 3-hop path when a v2 single onion rend fails Previously, we used a 1-hop path when a single onion rend failed immediately, and a 3-hop path when it failed after trying to build a circuit. Fixes bug 23818; bugfix on 0.2.9.3-alpha. --- src/or/rendservice.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/src/or/rendservice.c b/src/or/rendservice.c index 32b856452..f145e9d69 100644 --- a/src/or/rendservice.c +++ b/src/or/rendservice.c @@ -2073,8 +2073,12 @@ rend_service_receive_introduction(origin_circuit_t *circuit, int flags = CIRCLAUNCH_NEED_CAPACITY | CIRCLAUNCH_IS_INTERNAL; if (circ_needs_uptime) flags |= CIRCLAUNCH_NEED_UPTIME; /* A Single Onion Service only uses a direct connection if its - * firewall rules permit direct connections to the address. */ - if (rend_service_use_direct_connection(options, rp)) { + * firewall rules permit direct connections to the address. + * + * We only use a one-hop path on the first attempt. If the first attempt + * fails, we use a 3-hop path for reachability / reliability. + * See the comment in rend_service_relauch_rendezvous() for details. */ + if (rend_service_use_direct_connection(options, rp) && i == 0) { flags = flags | CIRCLAUNCH_ONEHOP_TUNNEL; } launched = circuit_launch_by_extend_info(

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[tor/master] rendservice: Always use a 3-hop path when a v2 single onion intro fails
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit 144084d6facc3d688c7d423a8b5b8da5e26de84c Author: teor <teor(a)torproject.org> Date: Fri Aug 23 14:54:15 2019 +1000 rendservice: Always use a 3-hop path when a v2 single onion intro fails Previously, we always used a 1-hop path, no matter how many times a v2 single onion intro failed. Fixes bug 23818; bugfix on 0.2.9.3-alpha. --- src/or/rendservice.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/src/or/rendservice.c b/src/or/rendservice.c index f145e9d69..ca1be5e5d 100644 --- a/src/or/rendservice.c +++ b/src/or/rendservice.c @@ -3041,8 +3041,15 @@ rend_service_launch_establish_intro(rend_service_t *service, extend_info_t *launch_ei = intro->extend_info; extend_info_t *direct_ei = NULL; - /* Are we in single onion mode? */ - if (rend_service_allow_non_anonymous_connection(options)) { + /* Are we in single onion mode? + * + * We only use a one-hop path on the first attempt. If the first attempt + * fails, we use a 3-hop path for reachability / reliability. + * (Unlike v3, retries is incremented by the caller after it calls this + * function.) + */ + if (rend_service_allow_non_anonymous_connection(options) && + intro->circuit_retries == 0) { /* Do we have a descriptor for the node? * We've either just chosen it from the consensus, or we've just reviewed * our intro points to see which ones are still valid, and deleted the ones

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[tor/master] changes: file for 23507, v3 onion service fix
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit 41bc1fac8e77e399572e020c5ba59462afd75f4b Author: teor <teor(a)torproject.org> Date: Fri Aug 23 16:25:33 2019 +1000 changes: file for 23507, v3 onion service fix --- changes/bug23507 | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/changes/bug23507 b/changes/bug23507 new file mode 100644 index 000000000..de18273fd --- /dev/null +++ b/changes/bug23507 @@ -0,0 +1,5 @@ + o Minor bugfixes (v3 single onion services): + - Make v3 single onion services fall back to a 3-hop intro, when there + all intro points are unreachable via a 1-hop path. Previously, v3 + single onion services failed when all intro nodes were unreachable + via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.

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[tor/master] changes: file for 23818, v3 onion service fix
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit 084245134b022aa983c45aa3fc0ace9fd7ae21a9 Author: teor <teor(a)torproject.org> Date: Fri Aug 23 15:10:45 2019 +1000 changes: file for 23818, v3 onion service fix --- changes/bug23818_v3 | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/changes/bug23818_v3 b/changes/bug23818_v3 new file mode 100644 index 000000000..c430144d8 --- /dev/null +++ b/changes/bug23818_v3 @@ -0,0 +1,6 @@ + o Minor bugfixes (v3 single onion services): + - Always retry v3 single onion service intro and rend circuits with a + 3-hop path. Previously, v3 single onion services used a 3-hop path + when rend circuits were retried after a remote or delayed failure, + but a 1-hop path for immediate retries. Fixes bug 23818; + bugfix on 0.3.2.1-alpha.

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[tor/master] hs: Always use a 3-hop path when a v3 single onion intro fails
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit 229a982405e0fd2f9980d3c1a41c34e0cf26ae26 Author: teor <teor(a)torproject.org> Date: Fri Aug 23 14:56:01 2019 +1000 hs: Always use a 3-hop path when a v3 single onion intro fails Previously, we always used a 1-hop path, no matter how many times a v3 single onion intro failed. Fixes bug 23818; bugfix on 0.3.2.1-alpha. --- src/feature/hs/hs_circuit.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/src/feature/hs/hs_circuit.c b/src/feature/hs/hs_circuit.c index f7996a24f..d74b088f0 100644 --- a/src/feature/hs/hs_circuit.c +++ b/src/feature/hs/hs_circuit.c @@ -775,8 +775,15 @@ hs_circ_launch_intro_point(hs_service_t *service, tor_assert(ei); /* Update circuit flags in case of a single onion service that requires a - * direct connection. */ - if (service->config.is_single_onion) { + * direct connection. + * + * We only use a one-hop path on the first attempt. If the first attempt + * fails, we use a 3-hop path for reachability / reliability. + * (Unlike v2, retries is incremented by the caller before it calls this + * function.) + */ + tor_assert_nonfatal(ip->circuit_retries > 0); + if (service->config.is_single_onion && ip->circuit_retries == 1) { circ_flags |= CIRCLAUNCH_ONEHOP_TUNNEL; }

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[tor/master] hs: Always use a 3-hop path when a v3 single onion rend fails
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit c94904b35982a73a652d9bed8b195ce625bbb962 Author: teor <teor(a)torproject.org> Date: Fri Aug 23 14:41:24 2019 +1000 hs: Always use a 3-hop path when a v3 single onion rend fails Previously, we used a 1-hop path when a single onion rend failed immediately, and a 3-hop path when it failed after trying to build a circuit. Fixes bug 23818; bugfix on 0.3.2.1-alpha. --- src/feature/hs/hs_circuit.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/src/feature/hs/hs_circuit.c b/src/feature/hs/hs_circuit.c index e3873d2f1..f7996a24f 100644 --- a/src/feature/hs/hs_circuit.c +++ b/src/feature/hs/hs_circuit.c @@ -405,8 +405,12 @@ launch_rendezvous_point_circuit(const hs_service_t *service, if (circ_needs_uptime) { circ_flags |= CIRCLAUNCH_NEED_UPTIME; } - /* Firewall and policies are checked when getting the extend info. */ - if (service->config.is_single_onion) { + /* Firewall and policies are checked when getting the extend info. + * + * We only use a one-hop path on the first attempt. If the first attempt + * fails, we use a 3-hop path for reachability / reliability. + * See the comment in retry_service_rendezvous_point() for details. */ + if (service->config.is_single_onion && i == 0) { circ_flags |= CIRCLAUNCH_ONEHOP_TUNNEL; }

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[tor/master] hs: v3 single onion services fall back to 3-hop intro for unreachable nodes
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit e2e1c07fd25c96a83b38f5d84d2c063b98ed8f46 Author: teor <teor(a)torproject.org> Date: Fri Aug 23 16:17:47 2019 +1000 hs: v3 single onion services fall back to 3-hop intro for unreachable nodes Previously, v3 single onion services failed when all intro nodes were unreachable via a 1-hop path. Now, we select intros that are only available via a 3-hop path, and use a 3-hop path to connect to them. Fixes bug 23507; bugfix on 0.3.2.1-alpha. --- src/feature/hs/hs_circuit.c | 25 +++++++++++++++---------- src/feature/hs/hs_circuit.h | 3 ++- src/feature/hs/hs_service.c | 30 +++++++++++++++++++++++------- 3 files changed, 40 insertions(+), 18 deletions(-) diff --git a/src/feature/hs/hs_circuit.c b/src/feature/hs/hs_circuit.c index d74b088f0..8acfcbd65 100644 --- a/src/feature/hs/hs_circuit.c +++ b/src/feature/hs/hs_circuit.c @@ -758,13 +758,16 @@ hs_circ_retry_service_rendezvous_point(origin_circuit_t *circ) } /* For a given service and a service intro point, launch a circuit to the - * extend info ei. If the service is a single onion, a one-hop circuit will be - * requested. Return 0 if the circuit was successfully launched and tagged + * extend info ei. If the service is a single onion, and direct_conn is true, + * a one-hop circuit will be requested. + * + * Return 0 if the circuit was successfully launched and tagged * with the correct identifier. On error, a negative value is returned. */ int hs_circ_launch_intro_point(hs_service_t *service, const hs_service_intro_point_t *ip, - extend_info_t *ei) + extend_info_t *ei, + bool direct_conn) { /* Standard flags for introduction circuit. */ int ret = -1, circ_flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL; @@ -775,15 +778,17 @@ hs_circ_launch_intro_point(hs_service_t *service, tor_assert(ei); /* Update circuit flags in case of a single onion service that requires a - * direct connection. - * - * We only use a one-hop path on the first attempt. If the first attempt + * direct connection. */ + tor_assert_nonfatal(ip->circuit_retries > 0); + /* Only single onion services can make direct conns */ + if (BUG(!service->config.is_single_onion && direct_conn)) { + goto end; + } + /* We only use a one-hop path on the first attempt. If the first attempt * fails, we use a 3-hop path for reachability / reliability. * (Unlike v2, retries is incremented by the caller before it calls this - * function.) - */ - tor_assert_nonfatal(ip->circuit_retries > 0); - if (service->config.is_single_onion && ip->circuit_retries == 1) { + * function.) */ + if (direct_conn && ip->circuit_retries == 1) { circ_flags |= CIRCLAUNCH_ONEHOP_TUNNEL; } diff --git a/src/feature/hs/hs_circuit.h b/src/feature/hs/hs_circuit.h index b8d8b25ad..e168b301f 100644 --- a/src/feature/hs/hs_circuit.h +++ b/src/feature/hs/hs_circuit.h @@ -26,7 +26,8 @@ void hs_circ_service_rp_has_opened(const hs_service_t *service, origin_circuit_t *circ); int hs_circ_launch_intro_point(hs_service_t *service, const hs_service_intro_point_t *ip, - extend_info_t *ei); + extend_info_t *ei, + bool direct_conn); int hs_circ_launch_rendezvous_point(const hs_service_t *service, const curve25519_public_key_t *onion_key, const uint8_t *rendezvous_cookie); diff --git a/src/feature/hs/hs_service.c b/src/feature/hs/hs_service.c index 402929036..b05f20366 100644 --- a/src/feature/hs/hs_service.c +++ b/src/feature/hs/hs_service.c @@ -2105,6 +2105,7 @@ build_all_descriptors(time_t now) static hs_service_intro_point_t * pick_intro_point(unsigned int direct_conn, smartlist_t *exclude_nodes) { + const or_options_t *options = get_options(); const node_t *node; extend_info_t *info = NULL; hs_service_intro_point_t *ip = NULL; @@ -2113,11 +2114,19 @@ pick_intro_point(unsigned int direct_conn, smartlist_t *exclude_nodes) /* Single onion flags. */ router_crn_flags_t direct_flags = flags | CRN_PREF_ADDR | CRN_DIRECT_CONN; - node = router_choose_random_node(exclude_nodes, get_options()->ExcludeNodes, + node = router_choose_random_node(exclude_nodes, options->ExcludeNodes, direct_conn ? direct_flags : flags); - /* Unable to find a node. When looking for a node for a direct connection, - * we could try a 3-hop path instead. We'll add support for this in a later - * release. */ + + /* If we are in single onion mode, retry node selection for a 3-hop + * path */ + if (direct_conn && !node) { + log_info(LD_REND, + "Unable to find an intro point that we can connect to " + "directly, falling back to a 3-hop path."); + node = router_choose_random_node(exclude_nodes, options->ExcludeNodes, + flags); + } + if (!node) { goto err; } @@ -2644,7 +2653,7 @@ launch_intro_point_circuits(hs_service_t *service) * circuits using the current map. */ FOR_EACH_DESCRIPTOR_BEGIN(service, desc) { /* Keep a ref on if we need a direct connection. We use this often. */ - unsigned int direct_conn = service->config.is_single_onion; + bool direct_conn = service->config.is_single_onion; DIGEST256MAP_FOREACH_MODIFY(desc->intro_points.map, key, hs_service_intro_point_t *, ip) { @@ -2655,8 +2664,15 @@ launch_intro_point_circuits(hs_service_t *service) if (hs_circ_service_get_intro_circ(ip)) { continue; } - ei = get_extend_info_from_intro_point(ip, direct_conn); + + /* If we can't connect directly to the intro point, get an extend_info + * for a multi-hop path instead. */ + if (ei == NULL && direct_conn) { + direct_conn = false; + ei = get_extend_info_from_intro_point(ip, 0); + } + if (ei == NULL) { /* This is possible if we can get a node_t but not the extend info out * of it. In this case, we remove the intro point and a new one will @@ -2668,7 +2684,7 @@ launch_intro_point_circuits(hs_service_t *service) /* Launch a circuit to the intro point. */ ip->circuit_retries++; - if (hs_circ_launch_intro_point(service, ip, ei) < 0) { + if (hs_circ_launch_intro_point(service, ip, ei, direct_conn) < 0) { log_info(LD_REND, "Unable to launch intro circuit to node %s " "for service %s.", safe_str_client(extend_info_describe(ei)),

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[tor/master] Merge branch 'bug23818_035' into bug23818_master
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit 65935f6da7ac9201c6197f4fc1b57527c8e3457a Merge: d475d7c2f 41bc1fac8 Author: teor <teor(a)torproject.org> Date: Fri Aug 23 16:26:32 2019 +1000 Merge branch 'bug23818_035' into bug23818_master changes/bug23507 | 5 +++++ changes/bug23818_v2 | 6 ++++++ changes/bug23818_v3 | 6 ++++++ src/feature/hs/hs_circuit.c | 28 ++++++++++++++++++++++------ src/feature/hs/hs_circuit.h | 3 ++- src/feature/hs/hs_service.c | 30 +++++++++++++++++++++++------- src/feature/rend/rendservice.c | 19 +++++++++++++++---- 7 files changed, 79 insertions(+), 18 deletions(-) diff --cc src/feature/hs/hs_service.c index 8a4f1efb1,b05f20366..283591274 --- a/src/feature/hs/hs_service.c +++ b/src/feature/hs/hs_service.c @@@ -2071,7 -2105,9 +2071,8 @@@ build_all_descriptors(time_t now static hs_service_intro_point_t * pick_intro_point(unsigned int direct_conn, smartlist_t *exclude_nodes) { + const or_options_t *options = get_options(); const node_t *node; - extend_info_t *info = NULL; hs_service_intro_point_t *ip = NULL; /* Normal 3-hop introduction point flags. */ router_crn_flags_t flags = CRN_NEED_UPTIME | CRN_NEED_DESC;

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[tor/master] hs: Remove an outdated comment
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit 55580d063d03ee100a75f4acea8286a6c6e53c8f Author: teor <teor(a)torproject.org> Date: Fri Aug 23 14:43:16 2019 +1000 hs: Remove an outdated comment --- src/feature/hs/hs_circuit.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/src/feature/hs/hs_circuit.c b/src/feature/hs/hs_circuit.c index 716c4b1f1..e3f9ca1de 100644 --- a/src/feature/hs/hs_circuit.c +++ b/src/feature/hs/hs_circuit.c @@ -389,10 +389,7 @@ launch_rendezvous_point_circuit(const hs_service_t *service, &data->onion_pk, service->config.is_single_onion); if (info == NULL) { - /* We are done here, we can't extend to the rendezvous point. - * If you're running an IPv6-only v3 single onion service on 0.3.2 or with - * 0.3.2 clients, and somehow disable the option check, it will fail here. - */ + /* We are done here, we can't extend to the rendezvous point. */ log_fn(LOG_PROTOCOL_WARN, LD_REND, "Not enough info to open a circuit to a rendezvous point for " "%s service %s.",

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[tor/master] Merge branch 'tor-github/pr/1257'
by dgoulet＠torproject.org 29 Aug '19

29 Aug '19

commit 960d9894159ebd830e41db7ed9ae4e166235e331 Merge: 7c99a4ddd 55580d063 Author: David Goulet <dgoulet(a)torproject.org> Date: Thu Aug 29 08:56:04 2019 -0400 Merge branch 'tor-github/pr/1257' src/feature/hs/hs_circuit.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)

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