tor-commits August 2017

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[tor/master] Re-run trunnel.
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 8e84968ffbf6d284e8a877ddcde6ded40b3f5681 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Aug 8 20:34:39 2017 -0400 Re-run trunnel. --- src/trunnel/channelpadding_negotiation.c | 10 +++++----- src/trunnel/channelpadding_negotiation.h | 10 +++++----- src/trunnel/ed25519_cert.h | 4 ---- 3 files changed, 10 insertions(+), 14 deletions(-) diff --git a/src/trunnel/channelpadding_negotiation.c b/src/trunnel/channelpadding_negotiation.c index 172d6f8a0..02fd823bf 100644 --- a/src/trunnel/channelpadding_negotiation.c +++ b/src/trunnel/channelpadding_negotiation.c @@ -1,4 +1,4 @@ -/* channelpadding_negotiation.c -- generated by Trunnel v1.4.3. +/* channelpadding_negotiation.c -- generated by Trunnel v1.5.1. * https://gitweb.torproject.org/trunnel.git * You probably shouldn't edit this file. */ @@ -57,7 +57,7 @@ channelpadding_negotiate_free(channelpadding_negotiate_t *obj) } uint8_t -channelpadding_negotiate_get_version(channelpadding_negotiate_t *inp) +channelpadding_negotiate_get_version(const channelpadding_negotiate_t *inp) { return inp->version; } @@ -72,7 +72,7 @@ channelpadding_negotiate_set_version(channelpadding_negotiate_t *inp, uint8_t va return 0; } uint8_t -channelpadding_negotiate_get_command(channelpadding_negotiate_t *inp) +channelpadding_negotiate_get_command(const channelpadding_negotiate_t *inp) { return inp->command; } @@ -87,7 +87,7 @@ channelpadding_negotiate_set_command(channelpadding_negotiate_t *inp, uint8_t va return 0; } uint16_t -channelpadding_negotiate_get_ito_low_ms(channelpadding_negotiate_t *inp) +channelpadding_negotiate_get_ito_low_ms(const channelpadding_negotiate_t *inp) { return inp->ito_low_ms; } @@ -98,7 +98,7 @@ channelpadding_negotiate_set_ito_low_ms(channelpadding_negotiate_t *inp, uint16_ return 0; } uint16_t -channelpadding_negotiate_get_ito_high_ms(channelpadding_negotiate_t *inp) +channelpadding_negotiate_get_ito_high_ms(const channelpadding_negotiate_t *inp) { return inp->ito_high_ms; } diff --git a/src/trunnel/channelpadding_negotiation.h b/src/trunnel/channelpadding_negotiation.h index e58bda3be..631c99670 100644 --- a/src/trunnel/channelpadding_negotiation.h +++ b/src/trunnel/channelpadding_negotiation.h @@ -1,4 +1,4 @@ -/* channelpadding_negotiation.h -- generated by by Trunnel v1.4.3. +/* channelpadding_negotiation.h -- generated by by Trunnel v1.5.1. * https://gitweb.torproject.org/trunnel.git * You probably shouldn't edit this file. */ @@ -60,7 +60,7 @@ int channelpadding_negotiate_clear_errors(channelpadding_negotiate_t *obj); /** Return the value of the version field of the * channelpadding_negotiate_t in 'inp' */ -uint8_t channelpadding_negotiate_get_version(channelpadding_negotiate_t *inp); +uint8_t channelpadding_negotiate_get_version(const channelpadding_negotiate_t *inp); /** Set the value of the version field of the * channelpadding_negotiate_t in 'inp' to 'val'. Return 0 on success; * return -1 and set the error code on 'inp' on failure. @@ -69,7 +69,7 @@ int channelpadding_negotiate_set_version(channelpadding_negotiate_t *inp, uint8_ /** Return the value of the command field of the * channelpadding_negotiate_t in 'inp' */ -uint8_t channelpadding_negotiate_get_command(channelpadding_negotiate_t *inp); +uint8_t channelpadding_negotiate_get_command(const channelpadding_negotiate_t *inp); /** Set the value of the command field of the * channelpadding_negotiate_t in 'inp' to 'val'. Return 0 on success; * return -1 and set the error code on 'inp' on failure. @@ -78,7 +78,7 @@ int channelpadding_negotiate_set_command(channelpadding_negotiate_t *inp, uint8_ /** Return the value of the ito_low_ms field of the * channelpadding_negotiate_t in 'inp' */ -uint16_t channelpadding_negotiate_get_ito_low_ms(channelpadding_negotiate_t *inp); +uint16_t channelpadding_negotiate_get_ito_low_ms(const channelpadding_negotiate_t *inp); /** Set the value of the ito_low_ms field of the * channelpadding_negotiate_t in 'inp' to 'val'. Return 0 on success; * return -1 and set the error code on 'inp' on failure. @@ -87,7 +87,7 @@ int channelpadding_negotiate_set_ito_low_ms(channelpadding_negotiate_t *inp, uin /** Return the value of the ito_high_ms field of the * channelpadding_negotiate_t in 'inp' */ -uint16_t channelpadding_negotiate_get_ito_high_ms(channelpadding_negotiate_t *inp); +uint16_t channelpadding_negotiate_get_ito_high_ms(const channelpadding_negotiate_t *inp); /** Set the value of the ito_high_ms field of the * channelpadding_negotiate_t in 'inp' to 'val'. Return 0 on success; * return -1 and set the error code on 'inp' on failure. diff --git a/src/trunnel/ed25519_cert.h b/src/trunnel/ed25519_cert.h index 0aa953d17..782bd5958 100644 --- a/src/trunnel/ed25519_cert.h +++ b/src/trunnel/ed25519_cert.h @@ -59,10 +59,6 @@ struct link_specifier_st { }; #endif typedef struct link_specifier_st link_specifier_t; -/** XXX hs_link_specifier_dup() violates the opaqueness of link_specifier_t by - * taking its sizeof(). If we ever want to turn on TRUNNEL_OPAQUE we would - * need to refactor that function to do the coyp by encoding and decoding the - * object. */ #if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_ED25519_CERT) struct ed25519_cert_st { uint8_t version;

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[tor/master] prop224: Always note down the use of internal circuit
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 400ba2f636edf5afb14fe3b57f23d80e433d893d Author: David Goulet <dgoulet(a)torproject.org> Date: Fri Aug 4 12:06:34 2017 -0400 prop224: Always note down the use of internal circuit Also, this removes all the callsite of this rephist in the hs subsystem Fixes #23097 Signed-off-by: David Goulet <dgoulet(a)torproject.org> --- src/or/circuituse.c | 31 ++++++++++++++++++++++++++----- src/or/circuituse.h | 3 ++- src/or/hs_circuit.c | 12 +----------- src/or/hs_circuit.h | 2 +- src/or/hs_service.c | 6 +++--- 5 files changed, 33 insertions(+), 21 deletions(-) diff --git a/src/or/circuituse.c b/src/or/circuituse.c index 5292dc01d..66006542d 100644 --- a/src/or/circuituse.c +++ b/src/or/circuituse.c @@ -1114,11 +1114,32 @@ needs_exit_circuits(time_t now, int *needs_uptime, int *needs_capacity) /* Return true if we need any more hidden service server circuits. * HS servers only need an internal circuit. */ STATIC int -needs_hs_server_circuits(int num_uptime_internal) +needs_hs_server_circuits(time_t now, int num_uptime_internal) { - return ((rend_num_services() || hs_service_get_num_services()) && - num_uptime_internal < SUFFICIENT_UPTIME_INTERNAL_HS_SERVERS && - router_have_consensus_path() != CONSENSUS_PATH_UNKNOWN); + if (!rend_num_services() && !hs_service_get_num_services()) { + /* No services, we don't need anything. */ + goto no_need; + } + + if (num_uptime_internal >= SUFFICIENT_UPTIME_INTERNAL_HS_SERVERS) { + /* We have sufficient amount of internal circuit. */ + goto no_need; + } + + if (router_have_consensus_path() == CONSENSUS_PATH_UNKNOWN) { + /* Consensus hasn't been checked or might be invalid so requesting + * internal circuits is not wise. */ + goto no_need; + } + + /* At this point, we need a certain amount of circuits and we will most + * likely use them for rendezvous so we note down the use of internal + * circuit for our prediction for circuit needing uptime and capacity. */ + rep_hist_note_used_internal(now, 1, 1); + + return 1; + no_need: + return 0; } /* We need at least this many internal circuits for hidden service clients */ @@ -1217,7 +1238,7 @@ circuit_predict_and_launch_new(void) return; } - if (needs_hs_server_circuits(num_uptime_internal)) { + if (needs_hs_server_circuits(now, num_uptime_internal)) { flags = (CIRCLAUNCH_NEED_CAPACITY | CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL); diff --git a/src/or/circuituse.h b/src/or/circuituse.h index ad4c214a3..e66679586 100644 --- a/src/or/circuituse.h +++ b/src/or/circuituse.h @@ -68,7 +68,8 @@ STATIC int circuit_is_available_for_use(const circuit_t *circ); STATIC int needs_exit_circuits(time_t now, int *port_needs_uptime, int *port_needs_capacity); -STATIC int needs_hs_server_circuits(int num_uptime_internal); +STATIC int needs_hs_server_circuits(time_t now, + int num_uptime_internal); STATIC int needs_hs_client_circuits(time_t now, int *needs_uptime, diff --git a/src/or/hs_circuit.c b/src/or/hs_circuit.c index f6594739b..d0265dc54 100644 --- a/src/or/hs_circuit.c +++ b/src/or/hs_circuit.c @@ -480,8 +480,6 @@ launch_rendezvous_point_circuit(const hs_service_t *service, tor_assert(data); circ_needs_uptime = hs_service_requires_uptime_circ(service->config.ports); - /* Help predict this next time */ - rep_hist_note_used_internal(now, circ_needs_uptime, 1); /* Get the extend info data structure for the chosen rendezvous point * specified by the given link specifiers. */ @@ -632,10 +630,6 @@ retry_service_rendezvous_point(const origin_circuit_t *circ) * has no anonymity (single onion), this change of behavior won't affect * security directly. */ - /* Help predict this next time */ - rep_hist_note_used_internal(time(NULL), bstate->need_uptime, - bstate->need_capacity); - new_circ = circuit_launch_by_extend_info(CIRCUIT_PURPOSE_S_CONNECT_REND, bstate->chosen_exit, flags); if (new_circ == NULL) { @@ -728,7 +722,7 @@ hs_circ_retry_service_rendezvous_point(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, time_t now) + extend_info_t *ei) { /* Standard flags for introduction circuit. */ int ret = -1, circ_flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL; @@ -748,10 +742,6 @@ hs_circ_launch_intro_point(hs_service_t *service, safe_str_client(extend_info_describe(ei)), safe_str_client(service->onion_address)); - /* Note down that we are about to use an internal circuit. */ - rep_hist_note_used_internal(now, circ_flags & CIRCLAUNCH_NEED_UPTIME, - circ_flags & CIRCLAUNCH_NEED_CAPACITY); - /* Note down the launch for the retry period. Even if the circuit fails to * be launched, we still want to respect the retry period to avoid stress on * the circuit subsystem. */ diff --git a/src/or/hs_circuit.h b/src/or/hs_circuit.h index 8706e6b0e..9e359394e 100644 --- a/src/or/hs_circuit.h +++ b/src/or/hs_circuit.h @@ -24,7 +24,7 @@ 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, time_t now); + extend_info_t *ei); 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/or/hs_service.c b/src/or/hs_service.c index 4c0ec628c..5f3696454 100644 --- a/src/or/hs_service.c +++ b/src/or/hs_service.c @@ -1749,7 +1749,7 @@ run_build_descriptor_event(time_t now) /* For the given service, launch any intro point circuits that could be * needed. This considers every descriptor of the service. */ static void -launch_intro_point_circuits(hs_service_t *service, time_t now) +launch_intro_point_circuits(hs_service_t *service) { tor_assert(service); @@ -1785,7 +1785,7 @@ launch_intro_point_circuits(hs_service_t *service, time_t now) /* Launch a circuit to the intro point. */ ip->circuit_retries++; - if (hs_circ_launch_intro_point(service, ip, ei, now) < 0) { + if (hs_circ_launch_intro_point(service, ip, ei) < 0) { log_warn(LD_REND, "Unable to launch intro circuit to node %s " "for service %s.", safe_str_client(extend_info_describe(ei)), @@ -1910,7 +1910,7 @@ run_build_circuit_event(time_t now) * circuit creation so make sure this service is respecting that limit. */ if (can_service_launch_intro_circuit(service, now)) { /* Launch intro point circuits if needed. */ - launch_intro_point_circuits(service, now); + launch_intro_point_circuits(service); /* Once the circuits have opened, we'll make sure to update the * descriptor intro point list and cleanup any extraneous. */ }

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[tor/master] prop224: Function to inc/decrement num rendezvous stream
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 5c4f4acedb8600769889cdff0940806c27b679bd Author: George Kadianakis <desnacked(a)riseup.net> Date: Mon Jul 31 17:59:12 2017 +0300 prop224: Function to inc/decrement num rendezvous stream Add a common function for both legacy and prop224 hidden service to increment and decrement the rendezvous stream counter on an origin circuit. Signed-off-by: David Goulet <dgoulet(a)torproject.org> --- src/or/circuituse.c | 3 +-- src/or/connection_edge.c | 10 +--------- src/or/hs_common.c | 34 ++++++++++++++++++++++++++++++++++ src/or/hs_common.h | 3 +++ 4 files changed, 39 insertions(+), 11 deletions(-) diff --git a/src/or/circuituse.c b/src/or/circuituse.c index 66006542d..21cc9c540 100644 --- a/src/or/circuituse.c +++ b/src/or/circuituse.c @@ -1383,8 +1383,7 @@ circuit_detach_stream(circuit_t *circ, edge_connection_t *conn) * number of streams on the circuit associated with the rend service. */ if (circ->purpose == CIRCUIT_PURPOSE_S_REND_JOINED) { - tor_assert(origin_circ->rend_data); - origin_circ->rend_data->nr_streams--; + hs_dec_rdv_stream_counter(origin_circ); } return; } diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c index 9f0cc061e..12ddc7e82 100644 --- a/src/or/connection_edge.c +++ b/src/or/connection_edge.c @@ -3139,15 +3139,7 @@ handle_hs_exit_conn(circuit_t *circ, edge_connection_t *conn) conn->on_circuit = circ; assert_circuit_ok(circ); - if (origin_circ->rend_data) { - origin_circ->rend_data->nr_streams++; - } else if (origin_circ->hs_ident) { - origin_circ->hs_ident->num_rdv_streams++; - } else { - /* The previous if/else at the start of the function guarantee that we'll - * never end up in a else situation unless it's freed in between. */ - tor_assert(0); - } + hs_inc_rdv_stream_counter(origin_circ); /* Connect tor to the hidden service destination. */ connection_exit_connect(conn); diff --git a/src/or/hs_common.c b/src/or/hs_common.c index 2b637eb78..0d3d41b7c 100644 --- a/src/or/hs_common.c +++ b/src/or/hs_common.c @@ -1333,3 +1333,37 @@ hs_free_all(void) hs_cache_free_all(); } +/* For the given origin circuit circ, decrement the number of rendezvous + * stream counter. This handles every hidden service version. */ +void +hs_dec_rdv_stream_counter(origin_circuit_t *circ) +{ + tor_assert(circ); + + if (circ->rend_data) { + circ->rend_data->nr_streams--; + } else if (circ->hs_ident) { + circ->hs_ident->num_rdv_streams--; + } else { + /* Should not be called if this circuit is not for hidden service. */ + tor_assert_nonfatal_unreached(); + } +} + +/* For the given origin circuit circ, increment the number of rendezvous + * stream counter. This handles every hidden service version. */ +void +hs_inc_rdv_stream_counter(origin_circuit_t *circ) +{ + tor_assert(circ); + + if (circ->rend_data) { + circ->rend_data->nr_streams++; + } else if (circ->hs_ident) { + circ->hs_ident->num_rdv_streams++; + } else { + /* Should not be called if this circuit is not for hidden service. */ + tor_assert_nonfatal_unreached(); + } +} + diff --git a/src/or/hs_common.h b/src/or/hs_common.h index 5004e0208..fd2a1f4e3 100644 --- a/src/or/hs_common.h +++ b/src/or/hs_common.h @@ -222,6 +222,9 @@ void hs_get_responsible_hsdirs(const ed25519_public_key_t *blinded_pk, int hs_set_conn_addr_port(const smartlist_t *ports, edge_connection_t *conn); +void hs_inc_rdv_stream_counter(origin_circuit_t *circ); +void hs_dec_rdv_stream_counter(origin_circuit_t *circ); + #ifdef HS_COMMON_PRIVATE STATIC void get_disaster_srv(uint64_t time_period_num, uint8_t *srv_out);

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[tor/master] Put comment in the trunnel file, so it wont go away.
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 2f17743d6f7222cf96250890dd91d6689b2d55c6 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Aug 8 20:31:47 2017 -0400 Put comment in the trunnel file, so it wont go away. --- src/trunnel/ed25519_cert.trunnel | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/trunnel/ed25519_cert.trunnel b/src/trunnel/ed25519_cert.trunnel index e424ce546..8d6483d55 100644 --- a/src/trunnel/ed25519_cert.trunnel +++ b/src/trunnel/ed25519_cert.trunnel @@ -28,6 +28,12 @@ const LS_IPV6 = 0x01; const LS_LEGACY_ID = 0x02; const LS_ED25519_ID = 0x03; +// XXX hs_link_specifier_dup() violates the opaqueness of link_specifier_t by +// taking its sizeof(). If we ever want to turn on TRUNNEL_OPAQUE, or +// if we ever make link_specifier contain other types, we will +// need to refactor that function to do the copy by encoding and decoding the +// object. + // amended from tor.trunnel struct link_specifier { u8 ls_type;

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[tor/master] Merge branch 'ticket20657_nickm_bugfixes_squashed'
by nickm＠torproject.org 09 Aug '17

09 Aug '17

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[tor/master] Add note about handling INTRODUCE2 cells.
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 0a0bbfe96fe425f27641f86fabd19f65a551ac6c Author: George Kadianakis <desnacked(a)riseup.net> Date: Tue Aug 8 11:51:16 2017 +0300 Add note about handling INTRODUCE2 cells. Also fix a check-spaces instance. --- src/or/hs_cell.c | 5 +++++ src/test/test_hs_service.c | 3 ++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/src/or/hs_cell.c b/src/or/hs_cell.c index 064e26334..a0e907460 100644 --- a/src/or/hs_cell.c +++ b/src/or/hs_cell.c @@ -210,6 +210,11 @@ build_legacy_establish_intro(const char *circ_nonce, crypto_pk_t *enc_key, * service and circuit which are used only for logging purposes. The resulting * parsed cell is put in cell_ptr_out. * + * This function only parses prop224 INTRODUCE2 cells even when the intro point + * is a legacy intro point. That's because intro points don't actually care + * about the contents of the introduce cell. Legacy INTRODUCE cells are only + * used by the legacy system now. + * * Return 0 on success else a negative value and cell_ptr_out is untouched. */ static int parse_introduce2_cell(const hs_service_t *service, diff --git a/src/test/test_hs_service.c b/src/test/test_hs_service.c index 6a7b9b527..aea2c8fbf 100644 --- a/src/test/test_hs_service.c +++ b/src/test/test_hs_service.c @@ -1114,7 +1114,8 @@ test_build_update_descriptors(void *arg) ed25519_keypair_generate(&kp1, 0); ri.cache_info.signing_key_cert = tor_malloc_zero(sizeof(tor_cert_t)); tt_assert(ri.cache_info.signing_key_cert); - ed25519_pubkey_copy(&ri.cache_info.signing_key_cert->signing_key, &kp1.pubkey); + ed25519_pubkey_copy(&ri.cache_info.signing_key_cert->signing_key, + &kp1.pubkey); nodelist_set_routerinfo(&ri, NULL); node = node_get_mutable_by_id(ri.cache_info.identity_digest); tt_assert(node);

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[tor/master] prop224: Use state file to save/load revision counters
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 6f046b2191ed1a10e9058fcc49491b8db5a96280 Author: George Kadianakis <desnacked(a)riseup.net> Date: Fri Jul 21 15:53:17 2017 +0300 prop224: Use state file to save/load revision counters Signed-off-by: David Goulet <dgoulet(a)torproject.org> --- src/or/hs_service.c | 209 ++++++++++++++++++++++++++++++++++++++++++++++++++-- src/or/or.h | 3 + src/or/statefile.c | 3 + 3 files changed, 208 insertions(+), 7 deletions(-) diff --git a/src/or/hs_service.c b/src/or/hs_service.c index f656592d5..6519cb1b6 100644 --- a/src/or/hs_service.c +++ b/src/or/hs_service.c @@ -23,6 +23,7 @@ #include "router.h" #include "routerkeys.h" #include "routerlist.h" +#include "statefile.h" #include "hs_circuit.h" #include "hs_common.h" @@ -71,6 +72,8 @@ static const char *address_tld = "onion"; * loading keys requires that we are an actual running tor process. */ static smartlist_t *hs_service_staging_list; +static void set_descriptor_revision_counter(hs_descriptor_t *hs_desc); + /* Helper: Function to compare two objects in the service map. Return 1 if the * two service have the same master public identity key. */ static inline int @@ -1283,6 +1286,9 @@ build_service_descriptor(hs_service_t *service, time_t now, goto err; } + /* Set the revision counter for this descriptor */ + set_descriptor_revision_counter(desc->desc); + /* Let's make sure that we've created a descriptor that can actually be * encoded properly. This function also checks if the encoded output is * decodable after. */ @@ -1936,6 +1942,200 @@ upload_descriptor_to_hsdir(const hs_service_t *service, return; } +/** Return a newly-allocated string for our state file which contains revision + * counter information for desc. The format is: + * + * HidServRevCounter <blinded_pubkey> <rev_counter> + */ +static char * +encode_desc_rev_counter_for_state(const hs_service_descriptor_t *desc) +{ + char *state_str = NULL; + char blinded_pubkey_b64[ED25519_BASE64_LEN+1]; + uint64_t rev_counter = desc->desc->plaintext_data.revision_counter; + const ed25519_public_key_t *blinded_pubkey = &desc->blinded_kp.pubkey; + + /* Turn the blinded key into b64 so that we save it on state */ + tor_assert(blinded_pubkey); + if (ed25519_public_to_base64(blinded_pubkey_b64, blinded_pubkey) < 0) { + goto done; + } + + /* Format is: <blinded key> <rev counter> */ + tor_asprintf(&state_str, "%s %" PRIu64, blinded_pubkey_b64, rev_counter); + + log_info(LD_GENERAL, "[!] Adding rev counter %" PRIu64 " for %s!", + rev_counter, blinded_pubkey_b64); + + done: + return state_str; +} + +/** Update HS descriptor revision counters in our state by removing the old + * ones and writing down the ones that are currently active. */ +static void +update_revision_counters_in_state(void) +{ + config_line_t *lines = NULL; + config_line_t **nextline = &lines; + or_state_t *state = get_or_state(); + + /* Prepare our state structure with the rev counters */ + FOR_EACH_SERVICE_BEGIN(service) { + FOR_EACH_DESCRIPTOR_BEGIN(service, desc) { + /* We don't want to save zero counters */ + if (desc->desc->plaintext_data.revision_counter == 0) { + continue; + } + + *nextline = tor_malloc_zero(sizeof(config_line_t)); + (*nextline)->key = tor_strdup("HidServRevCounter"); + (*nextline)->value = encode_desc_rev_counter_for_state(desc); + nextline = &(*nextline)->next; + } FOR_EACH_DESCRIPTOR_END; + } FOR_EACH_SERVICE_END; + + /* Remove the old rev counters, and replace them with the new ones */ + config_free_lines(state->HidServRevCounters); + state->HidServRevCounters = lines; + + /* Set the state as dirty since we just edited it */ + if (!get_options()->AvoidDiskWrites) { + or_state_mark_dirty(state, 0); + } +} + +/** Scan the string state_line for the revision counter of the service + * with blinded_pubkey. Set service_found_out to True if the + * line is relevant to this service, and return the cached revision + * counter. Else set service_found_out to False. */ +static uint64_t +check_state_line_for_service_rev_counter(const char *state_line, + ed25519_public_key_t *blinded_pubkey, + int *service_found_out) +{ + smartlist_t *items = NULL; + int ok; + ed25519_public_key_t pubkey_in_state; + uint64_t rev_counter = 0; + + tor_assert(service_found_out); + tor_assert(state_line); + tor_assert(blinded_pubkey); + + /* Assume that the line is not for this service */ + *service_found_out = 0; + + /* Start parsing the state line */ + items = smartlist_new(); + smartlist_split_string(items, state_line, NULL, + SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, -1); + if (smartlist_len(items) < 2) { + log_warn(LD_GENERAL, "Incomplete rev counter line. Ignoring."); + goto done; + } + + char *b64_key_str = smartlist_get(items, 0); + char *saved_rev_counter_str = smartlist_get(items, 1); + + /* Parse blinded key to check if it's for this hidden service */ + if (ed25519_public_from_base64(&pubkey_in_state, b64_key_str) < 0) { + log_warn(LD_GENERAL, "Unable to base64 key in revcount line. Ignoring."); + goto done; + } + /* State line not for this hidden service */ + if (!ed25519_pubkey_eq(&pubkey_in_state, blinded_pubkey)) { + goto done; + } + + rev_counter = tor_parse_uint64(saved_rev_counter_str, + 10, 0, UINT64_MAX, &ok, NULL); + if (!ok) { + log_warn(LD_GENERAL, "Unable to parse rev counter. Ignoring."); + goto done; + } + + /* Since we got this far, the line was for this service */ + *service_found_out = 1; + + log_info(LD_GENERAL, "Found rev counter for %s: %" PRIu64, + b64_key_str, rev_counter); + + done: + if (items) { + SMARTLIST_FOREACH(items, char*, s, tor_free(s)); + smartlist_free(items); + } + + return rev_counter; +} + +/** Dig into our state file and find the current revision counter for the + * service with blinded key blinded_pubkey. If no revision counter is + * found, return 0. */ +static uint64_t +get_rev_counter_for_service(ed25519_public_key_t *blinded_pubkey) +{ + or_state_t *state = get_or_state(); + config_line_t *line; + + /* Set default value for rev counters (if not found) to 0 */ + uint64_t final_rev_counter = 0; + + for (line = state->HidServRevCounters ; line ; line = line->next) { + int service_found = 0; + uint64_t rev_counter = 0; + + tor_assert(!strcmp(line->key, "HidServRevCounter")); + + /* Scan all the HidServRevCounters lines till we find the line for this + service: */ + rev_counter = check_state_line_for_service_rev_counter(line->value, + blinded_pubkey, + &service_found); + if (service_found) { + final_rev_counter = rev_counter; + goto done; + } + } + + done: + return final_rev_counter; +} + +/** Update the value of the revision counter for hs_desc and save it on + our state file. */ +static void +update_descriptor_revision_counter(hs_descriptor_t *hs_desc) +{ + /* Find stored rev counter if it exists */ + uint64_t rev_counter = + get_rev_counter_for_service(&hs_desc->plaintext_data.blinded_pubkey); + + /* Increment the revision counter of hs_desc so the next update (which + * will trigger an upload) will have the right value. We do this at this + * stage to only do it once because a descriptor can have many updates before + * being uploaded. By doing it at upload, we are sure to only increment by 1 + * and thus avoid leaking how many operations we made on the descriptor from + * the previous one before uploading. */ + rev_counter++; + hs_desc->plaintext_data.revision_counter = rev_counter; + + update_revision_counters_in_state(); +} + +/** Set the revision counter in hs_desc, using the state file to find + * the current counter value if it exists. */ +static void +set_descriptor_revision_counter(hs_descriptor_t *hs_desc) +{ + /* Find stored rev counter if it exists */ + uint64_t rev_counter = + get_rev_counter_for_service(&hs_desc->plaintext_data.blinded_pubkey); + + hs_desc->plaintext_data.revision_counter = rev_counter; +} + /* Encode and sign the service descriptor desc and upload it to the * responsible hidden service directories. If for_next_period is true, the set * of directories are selected using the next hsdir_index. This does nothing @@ -1992,13 +2192,8 @@ upload_descriptor_to_all(const hs_service_t *service, safe_str_client(service->onion_address), fmt_next_time); } - /* Increment the revision counter so the next update (which will trigger an - * upload) will have the right value. We do this at this stage to only do it - * once because a descriptor can have many updates before being uploaded. By - * doing it at upload, we are sure to only increment by 1 and thus avoid - * leaking how many operations we made on the descriptor from the previous - * one before uploading. */ - desc->desc->plaintext_data.revision_counter += 1; + /* Update the revision counter of this descriptor */ + update_descriptor_revision_counter(desc->desc); smartlist_free(responsible_dirs); return; diff --git a/src/or/or.h b/src/or/or.h index 09e58b7b1..d8aea3827 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -4626,6 +4626,9 @@ typedef struct { config_line_t *TransportProxies; + /** Cached revision counters for active hidden services on this host */ + config_line_t *HidServRevCounters; + /** These fields hold information on the history of bandwidth usage for * servers. The "Ends" fields hold the time when we last updated the * bandwidth usage. The "Interval" fields hold the granularity, in seconds, diff --git a/src/or/statefile.c b/src/or/statefile.c index d0606b301..6b759960c 100644 --- a/src/or/statefile.c +++ b/src/or/statefile.c @@ -85,6 +85,9 @@ static config_var_t state_vars_[] = { VAR("TransportProxy", LINELIST_S, TransportProxies, NULL), V(TransportProxies, LINELIST_V, NULL), + VAR("HidServRevCounter", LINELIST_S, HidServRevCounters, NULL), + V(HidServRevCounters, LINELIST_V, NULL), + V(BWHistoryReadEnds, ISOTIME, NULL), V(BWHistoryReadInterval, UINT, "900"), V(BWHistoryReadValues, CSV, ""),

1 0

[tor/master] SR: Calculate current SRV phase/run duration.
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 0b22b7fce3f1ce97a85f4022533b206f847b7307 Author: George Kadianakis <desnacked(a)riseup.net> Date: Mon Jul 24 13:30:04 2017 +0300 SR: Calculate current SRV phase/run duration. This is also needed to make the HS desc overlap mode function independent of absolute hours. --- src/or/shared_random_state.c | 16 ++++++++++++++++ src/or/shared_random_state.h | 2 ++ src/test/test_shared_random.c | 21 +++++++++++++++++++++ 3 files changed, 39 insertions(+) diff --git a/src/or/shared_random_state.c b/src/or/shared_random_state.c index 1fc1440d0..7f8094daf 100644 --- a/src/or/shared_random_state.c +++ b/src/or/shared_random_state.c @@ -176,6 +176,22 @@ sr_state_get_start_time_of_current_protocol_run(time_t now) return beginning_of_current_round - time_elapsed_since_start_of_run; } +/** Return the time (in seconds) it takes to complete a full SR protocol phase + * (e.g. the commit phase). */ +unsigned int +sr_state_get_phase_duration(void) +{ + return SHARED_RANDOM_N_ROUNDS * get_voting_interval(); +} + +/** Return the time (in seconds) it takes to complete a full SR protocol run */ +unsigned int +sr_state_get_protocol_run_duration(void) +{ + int total_protocol_rounds = SHARED_RANDOM_N_ROUNDS * SHARED_RANDOM_N_PHASES; + return total_protocol_rounds * get_voting_interval(); +} + /* Return the time we should expire the state file created at now. * We expire the state file in the beginning of the next protocol run. */ STATIC time_t diff --git a/src/or/shared_random_state.h b/src/or/shared_random_state.h index ae1c5ac21..03dd5eb37 100644 --- a/src/or/shared_random_state.h +++ b/src/or/shared_random_state.h @@ -122,6 +122,8 @@ void sr_state_save(void); void sr_state_free(void); time_t sr_state_get_start_time_of_current_protocol_run(time_t now); +unsigned int sr_state_get_phase_duration(void); +unsigned int sr_state_get_protocol_run_duration(void); #ifdef SHARED_RANDOM_STATE_PRIVATE diff --git a/src/test/test_shared_random.c b/src/test/test_shared_random.c index 3eb47dfbc..ea037d417 100644 --- a/src/test/test_shared_random.c +++ b/src/test/test_shared_random.c @@ -260,6 +260,25 @@ test_get_start_time_of_current_run(void *arg) ; } +static void +test_get_sr_protocol_duration(void *arg) +{ + (void) arg; + + /* Check that by default an SR phase is 12 hours */ + tt_int_op(sr_state_get_phase_duration(), ==, 12*60*60); + tt_int_op(sr_state_get_protocol_run_duration(), ==, 24*60*60); + + /* Now alter the voting interval and check that the SR phase is 2 mins long + * if voting happens every 10 seconds (10*12 seconds = 2 mins) */ + or_options_t *options = get_options_mutable(); + options->V3AuthVotingInterval = 10; + tt_int_op(sr_state_get_phase_duration(), ==, 2*60); + tt_int_op(sr_state_get_protocol_run_duration(), ==, 4*60); + + done: ; +} + /* Mock function to immediately return our local 'mock_consensus'. */ static networkstatus_t * mock_networkstatus_get_live_consensus(time_t now) @@ -1345,6 +1364,8 @@ struct testcase_t sr_tests[] = { NULL, NULL }, { "get_start_time_of_current_run", test_get_start_time_of_current_run, TT_FORK, NULL, NULL }, + { "get_sr_protocol_duration", test_get_sr_protocol_duration, TT_FORK, + NULL, NULL }, { "get_state_valid_until_time", test_get_state_valid_until_time, TT_FORK, NULL, NULL }, { "vote", test_vote, TT_FORK,

1 0

[tor/master] prop224: Compute start time of next time period.
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 2cd5f9a2fc2765539899b6e84ed4b1c9e02febad Author: George Kadianakis <desnacked(a)riseup.net> Date: Tue Jul 18 16:44:03 2017 +0300 prop224: Compute start time of next time period. --- src/or/hs_common.c | 16 +++++++++++++ src/or/hs_common.h | 1 + src/test/test_hs_common.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 78 insertions(+) diff --git a/src/or/hs_common.c b/src/or/hs_common.c index 01bd204e1..0d81063cf 100644 --- a/src/or/hs_common.c +++ b/src/or/hs_common.c @@ -23,6 +23,7 @@ #include "rendservice.h" #include "router.h" #include "shared_random.h" +#include "shared_random_state.h" /* Ed25519 Basepoint value. Taken from section 5 of * https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-03 */ @@ -216,6 +217,21 @@ hs_get_next_time_period_num(time_t now) return hs_get_time_period_num(now) + 1; } +/* Return the start time of the upcoming time period based on now. */ +time_t +hs_get_start_time_of_next_time_period(time_t now) +{ + uint64_t time_period_length = get_time_period_length(); + + /* Get start time of next time period */ + uint64_t next_time_period_num = hs_get_next_time_period_num(now); + uint64_t start_of_next_tp_in_mins = next_time_period_num *time_period_length; + + /* Apply rotation offset as specified by prop224 section [TIME-PERIODS] */ + unsigned int time_period_rotation_offset = sr_state_get_phase_duration(); + return start_of_next_tp_in_mins * 60 + time_period_rotation_offset; +} + /* Create a new rend_data_t for a specific given version. * Return a pointer to the newly allocated data structure. */ static rend_data_t * diff --git a/src/or/hs_common.h b/src/or/hs_common.h index cbf1ac113..519485d57 100644 --- a/src/or/hs_common.h +++ b/src/or/hs_common.h @@ -195,6 +195,7 @@ void hs_get_subcredential(const ed25519_public_key_t *identity_pk, uint64_t hs_get_time_period_num(time_t now); uint64_t hs_get_next_time_period_num(time_t now); +time_t hs_get_start_time_of_next_time_period(time_t now); link_specifier_t *hs_link_specifier_dup(const link_specifier_t *lspec); diff --git a/src/test/test_hs_common.c b/src/test/test_hs_common.c index 27bbab8d4..e41d68d42 100644 --- a/src/test/test_hs_common.c +++ b/src/test/test_hs_common.c @@ -14,6 +14,7 @@ #include "hs_test_helpers.h" #include "hs_common.h" +#include "config.h" static void test_validate_address(void *arg) @@ -132,6 +133,64 @@ test_time_period(void *arg) ; } +static void +test_start_time_of_next_time_period(void *arg) +{ + (void) arg; + int retval; + time_t fake_time; + char tbuf[ISO_TIME_LEN + 1]; + time_t next_tp_start_time; + + /* Do some basic tests */ + retval = parse_rfc1123_time("Wed, 13 Apr 2016 11:00:00 UTC", + &fake_time); + tt_int_op(retval, ==, 0); + next_tp_start_time = hs_get_start_time_of_next_time_period(fake_time); + /* Compare it with the correct result */ + format_iso_time(tbuf, next_tp_start_time); + tt_str_op("2016-04-13 12:00:00", OP_EQ, tbuf); + + /* Another test with an edge-case time (start of TP) */ + retval = parse_rfc1123_time("Wed, 13 Apr 2016 12:00:00 UTC", + &fake_time); + tt_int_op(retval, ==, 0); + next_tp_start_time = hs_get_start_time_of_next_time_period(fake_time); + format_iso_time(tbuf, next_tp_start_time); + tt_str_op("2016-04-14 12:00:00", OP_EQ, tbuf); + + { + /* Now pretend we are on a testing network and alter the voting schedule to + be every 10 seconds. This means that a time period has length 10*24 + seconds (4 minutes). It also means that we apply a rotational offset of + 120 seconds to the time period, so that it starts at 00:02:00 instead of + 00:00:00. */ + or_options_t *options = get_options_mutable(); + options->TestingTorNetwork = 1; + options->V3AuthVotingInterval = 10; + options->TestingV3AuthInitialVotingInterval = 10; + + retval = parse_rfc1123_time("Wed, 13 Apr 2016 00:00:00 UTC", + &fake_time); + tt_int_op(retval, ==, 0); + next_tp_start_time = hs_get_start_time_of_next_time_period(fake_time); + /* Compare it with the correct result */ + format_iso_time(tbuf, next_tp_start_time); + tt_str_op("2016-04-13 00:02:00", OP_EQ, tbuf); + + retval = parse_rfc1123_time("Wed, 13 Apr 2016 00:02:00 UTC", + &fake_time); + tt_int_op(retval, ==, 0); + next_tp_start_time = hs_get_start_time_of_next_time_period(fake_time); + /* Compare it with the correct result */ + format_iso_time(tbuf, next_tp_start_time); + tt_str_op("2016-04-13 00:06:00", OP_EQ, tbuf); + } + + done: + ; +} + /** Test that our HS overlap period functions work properly. */ static void test_desc_overlap_period(void *arg) @@ -186,6 +245,8 @@ struct testcase_t hs_common_tests[] = { NULL, NULL }, { "time_period", test_time_period, TT_FORK, NULL, NULL }, + { "start_time_of_next_time_period", test_start_time_of_next_time_period, + TT_FORK, NULL, NULL }, { "desc_overlap_period", test_desc_overlap_period, TT_FORK, NULL, NULL },

1 0

[tor/master] prop224: Make prop224 time periods smaller in testnets.
by nickm＠torproject.org 09 Aug '17

09 Aug '17

commit 6c00bd1f10f4683824deeaa7dd8a23aaf6b9a40e Author: George Kadianakis <desnacked(a)riseup.net> Date: Tue Jul 18 18:10:26 2017 +0300 prop224: Make prop224 time periods smaller in testnets. It used to be that time periods were 24 hours long even on chutney, which made testing harder. With this commit, time periods have the same length as a full SRV protocol run, which means that they will change every 4 minutes in a 10-second voting interval chutney network! --- src/or/hs_common.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/src/or/hs_common.c b/src/or/hs_common.c index 0ae196d93..9c3d2c171 100644 --- a/src/or/hs_common.c +++ b/src/or/hs_common.c @@ -181,6 +181,17 @@ hs_check_service_private_dir(const char *username, const char *path, STATIC uint64_t get_time_period_length(void) { + /* If we are on a test network, make the time period smaller than normal so + that we actually see it rotate. Specifically, make it the same length as + an SRV protocol run. */ + if (get_options()->TestingTorNetwork) { + unsigned run_duration = sr_state_get_protocol_run_duration(); + /* An SRV run should take more than a minute (it's 24 rounds) */ + tor_assert_nonfatal(run_duration > 60); + /* Turn it from seconds to minutes before returning: */ + return sr_state_get_protocol_run_duration() / 60; + } + int32_t time_period_length = networkstatus_get_param(NULL, "hsdir-interval", HS_TIME_PERIOD_LENGTH_DEFAULT, HS_TIME_PERIOD_LENGTH_MIN,

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