diff options
Diffstat (limited to 'src/or/router.c')
| -rw-r--r-- | src/or/router.c | 233 |
1 files changed, 160 insertions, 73 deletions
diff --git a/src/or/router.c b/src/or/router.c index 2707e028b8..8ad5d038ef 100644 --- a/src/or/router.c +++ b/src/or/router.c @@ -1,7 +1,7 @@ /* Copyright (c) 2001 Matej Pfajfar. * Copyright (c) 2001-2004, Roger Dingledine. * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. - * Copyright (c) 2007-2016, The Tor Project, Inc. */ + * Copyright (c) 2007-2017, The Tor Project, Inc. */ /* See LICENSE for licensing information */ #define ROUTER_PRIVATE @@ -148,6 +148,51 @@ dup_onion_keys(crypto_pk_t **key, crypto_pk_t **last) tor_mutex_release(key_lock); } +/** Expire our old set of onion keys. This is done by setting + * last_curve25519_onion_key and lastonionkey to all zero's and NULL + * respectively. + * + * This function does not perform any grace period checks for the old onion + * keys. + */ +void +expire_old_onion_keys(void) +{ + char *fname = NULL; + + tor_mutex_acquire(key_lock); + + /* Free lastonionkey and set it to NULL. */ + if (lastonionkey) { + crypto_pk_free(lastonionkey); + lastonionkey = NULL; + } + + /* We zero out the keypair. See the tor_mem_is_zero() check made in + * construct_ntor_key_map() below. */ + memset(&last_curve25519_onion_key, 0, sizeof(last_curve25519_onion_key)); + + tor_mutex_release(key_lock); + + fname = get_datadir_fname2("keys", "secret_onion_key.old"); + if (file_status(fname) == FN_FILE) { + if (tor_unlink(fname) != 0) { + log_warn(LD_FS, "Couldn't unlink old onion key file %s: %s", + fname, strerror(errno)); + } + } + tor_free(fname); + + fname = get_datadir_fname2("keys", "secret_onion_key_ntor.old"); + if (file_status(fname) == FN_FILE) { + if (tor_unlink(fname) != 0) { + log_warn(LD_FS, "Couldn't unlink old ntor onion key file %s: %s", + fname, strerror(errno)); + } + } + tor_free(fname); +} + /** Return the current secret onion key for the ntor handshake. Must only * be called from the main thread. */ static const curve25519_keypair_t * @@ -212,7 +257,11 @@ set_server_identity_key(crypto_pk_t *k) { crypto_pk_free(server_identitykey); server_identitykey = k; - crypto_pk_get_digest(server_identitykey, server_identitykey_digest); + if (crypto_pk_get_digest(server_identitykey, + server_identitykey_digest) < 0) { + log_err(LD_BUG, "Couldn't compute our own identity key digest."); + tor_assert(0); + } } /** Make sure that we have set up our identity keys to match or not match as @@ -683,6 +732,47 @@ v3_authority_check_key_expiry(void) last_warned = now; } +/** Get the lifetime of an onion key in days. This value is defined by the + * network consesus parameter "onion-key-rotation-days". Always returns a value + * between <b>MIN_ONION_KEY_LIFETIME_DAYS</b> and + * <b>MAX_ONION_KEY_LIFETIME_DAYS</b>. + */ +static int +get_onion_key_rotation_days_(void) +{ + return networkstatus_get_param(NULL, + "onion-key-rotation-days", + DEFAULT_ONION_KEY_LIFETIME_DAYS, + MIN_ONION_KEY_LIFETIME_DAYS, + MAX_ONION_KEY_LIFETIME_DAYS); +} + +/** Get the current lifetime of an onion key in seconds. This value is defined + * by the network consesus parameter "onion-key-rotation-days", but the value + * is converted to seconds. + */ +int +get_onion_key_lifetime(void) +{ + return get_onion_key_rotation_days_()*24*60*60; +} + +/** Get the grace period of an onion key in seconds. This value is defined by + * the network consesus parameter "onion-key-grace-period-days", but the value + * is converted to seconds. + */ +int +get_onion_key_grace_period(void) +{ + int grace_period; + grace_period = networkstatus_get_param(NULL, + "onion-key-grace-period-days", + DEFAULT_ONION_KEY_GRACE_PERIOD_DAYS, + MIN_ONION_KEY_GRACE_PERIOD_DAYS, + get_onion_key_rotation_days_()); + return grace_period*24*60*60; +} + /** Set up Tor's TLS contexts, based on our configuration and keys. Return 0 * on success, and -1 on failure. */ int @@ -693,12 +783,6 @@ router_initialize_tls_context(void) int lifetime = options->SSLKeyLifetime; if (public_server_mode(options)) flags |= TOR_TLS_CTX_IS_PUBLIC_SERVER; - if (options->TLSECGroup) { - if (!strcasecmp(options->TLSECGroup, "P256")) - flags |= TOR_TLS_CTX_USE_ECDHE_P256; - else if (!strcasecmp(options->TLSECGroup, "P224")) - flags |= TOR_TLS_CTX_USE_ECDHE_P224; - } if (!lifetime) { /* we should guess a good ssl cert lifetime */ /* choose between 5 and 365 days, and round to the day */ @@ -876,8 +960,12 @@ init_keys(void) } cert = get_my_v3_authority_cert(); if (cert) { - crypto_pk_get_digest(get_my_v3_authority_cert()->identity_key, - v3_digest); + if (crypto_pk_get_digest(get_my_v3_authority_cert()->identity_key, + v3_digest) < 0) { + log_err(LD_BUG, "Couldn't compute my v3 authority identity key " + "digest."); + return -1; + } v3_digest_set = 1; } } @@ -929,7 +1017,7 @@ init_keys(void) /* We have no LastRotatedOnionKey set; either we just created the key * or it's a holdover from 0.1.2.4-alpha-dev or earlier. In either case, * start the clock ticking now so that we will eventually rotate it even - * if we don't stay up for a full MIN_ONION_KEY_LIFETIME. */ + * if we don't stay up for the full lifetime of an onion key. */ state->LastRotatedOnionKey = onionkey_set_at = now; or_state_mark_dirty(state, options->AvoidDiskWrites ? time(NULL)+3600 : 0); @@ -985,7 +1073,7 @@ init_keys(void) /* 4. Build our router descriptor. */ /* Must be called after keys are initialized. */ mydesc = router_get_my_descriptor(); - if (authdir_mode_handles_descs(options, ROUTER_PURPOSE_GENERAL)) { + if (authdir_mode_v3(options)) { const char *m = NULL; routerinfo_t *ri; /* We need to add our own fingerprint so it gets recognized. */ @@ -1385,14 +1473,23 @@ consider_testing_reachability(int test_or, int test_dir) !connection_get_by_type_addr_port_purpose( CONN_TYPE_DIR, &addr, me->dir_port, DIR_PURPOSE_FETCH_SERVERDESC)) { + tor_addr_port_t my_orport, my_dirport; + memcpy(&my_orport.addr, &addr, sizeof(addr)); + memcpy(&my_dirport.addr, &addr, sizeof(addr)); + my_orport.port = me->or_port; + my_dirport.port = me->dir_port; /* ask myself, via tor, for my server descriptor. */ - directory_initiate_command(&addr, me->or_port, - &addr, me->dir_port, - me->cache_info.identity_digest, - DIR_PURPOSE_FETCH_SERVERDESC, - ROUTER_PURPOSE_GENERAL, - DIRIND_ANON_DIRPORT, "authority.z", - NULL, 0, 0, NULL); + directory_request_t *req = + directory_request_new(DIR_PURPOSE_FETCH_SERVERDESC); + directory_request_set_or_addr_port(req, &my_orport); + directory_request_set_dir_addr_port(req, &my_dirport); + directory_request_set_directory_id_digest(req, + me->cache_info.identity_digest); + // ask via an anon circuit, connecting to our dirport. + directory_request_set_indirection(req, DIRIND_ANON_DIRPORT); + directory_request_set_resource(req, "authority.z"); + directory_initiate_request(req); + directory_request_free(req); } } @@ -1507,32 +1604,19 @@ authdir_mode_v3(const or_options_t *options) { return authdir_mode(options) && options->V3AuthoritativeDir != 0; } -/** Return true iff we are a v3 directory authority. */ -int -authdir_mode_any_main(const or_options_t *options) -{ - return options->V3AuthoritativeDir; -} -/** Return true if we believe ourselves to be any kind of - * authoritative directory beyond just a hidserv authority. */ -int -authdir_mode_any_nonhidserv(const or_options_t *options) -{ - return options->BridgeAuthoritativeDir || - authdir_mode_any_main(options); -} /** Return true iff we are an authoritative directory server that is * authoritative about receiving and serving descriptors of type - * <b>purpose</b> on its dirport. Use -1 for "any purpose". */ + * <b>purpose</b> on its dirport. + */ int authdir_mode_handles_descs(const or_options_t *options, int purpose) { - if (purpose < 0) - return authdir_mode_any_nonhidserv(options); + if (BUG(purpose < 0)) /* Deprecated. */ + return authdir_mode(options); else if (purpose == ROUTER_PURPOSE_GENERAL) - return authdir_mode_any_main(options); + return authdir_mode_v3(options); else if (purpose == ROUTER_PURPOSE_BRIDGE) - return (options->BridgeAuthoritativeDir); + return authdir_mode_bridge(options); else return 0; } @@ -1544,7 +1628,7 @@ authdir_mode_publishes_statuses(const or_options_t *options) { if (authdir_mode_bridge(options)) return 0; - return authdir_mode_any_nonhidserv(options); + return authdir_mode(options); } /** Return true iff we are an authoritative directory server that * tests reachability of the descriptors it learns about. @@ -1552,7 +1636,7 @@ authdir_mode_publishes_statuses(const or_options_t *options) int authdir_mode_tests_reachability(const or_options_t *options) { - return authdir_mode_handles_descs(options, -1); + return authdir_mode(options); } /** Return true iff we believe ourselves to be a bridge authoritative * directory server. @@ -1569,8 +1653,7 @@ MOCK_IMPL(int, server_mode,(const or_options_t *options)) { if (options->ClientOnly) return 0; - /* XXXX I believe we can kill off ORListenAddress here.*/ - return (options->ORPort_set || options->ORListenAddress); + return (options->ORPort_set); } /** Return true iff we are trying to be a non-bridge server. @@ -1781,7 +1864,7 @@ static const char *desc_gen_reason = NULL; * now. */ static time_t desc_clean_since = 0; /** Why did we mark the descriptor dirty? */ -static const char *desc_dirty_reason = NULL; +static const char *desc_dirty_reason = "Tor just started"; /** Boolean: do we need to regenerate the above? */ static int desc_needs_upload = 0; @@ -1862,7 +1945,7 @@ router_compare_to_my_exit_policy(const tor_addr_t *addr, uint16_t port) desc_routerinfo->ipv6_exit_policy && compare_tor_addr_to_short_policy(addr, port, me->ipv6_exit_policy) != ADDR_POLICY_ACCEPTED; -#endif +#endif /* 0 */ } else { return -1; } @@ -2194,19 +2277,17 @@ router_build_fresh_descriptor(routerinfo_t **r, extrainfo_t **e) } if (options->MyFamily && ! options->BridgeRelay) { - smartlist_t *family; if (!warned_nonexistent_family) warned_nonexistent_family = smartlist_new(); - family = smartlist_new(); ri->declared_family = smartlist_new(); - smartlist_split_string(family, options->MyFamily, ",", - SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK|SPLIT_STRIP_SPACE, 0); - SMARTLIST_FOREACH_BEGIN(family, char *, name) { + config_line_t *family; + for (family = options->MyFamily; family; family = family->next) { + char *name = family->value; const node_t *member; if (!strcasecmp(name, options->Nickname)) - goto skip; /* Don't list ourself, that's redundant */ + continue; /* Don't list ourself, that's redundant */ else - member = node_get_by_nickname(name, 1); + member = node_get_by_nickname(name, 0); if (!member) { int is_legal = is_legal_nickname_or_hexdigest(name); if (!smartlist_contains_string(warned_nonexistent_family, name) && @@ -2223,8 +2304,7 @@ router_build_fresh_descriptor(routerinfo_t **r, extrainfo_t **e) smartlist_add_strdup(warned_nonexistent_family, name); } if (is_legal) { - smartlist_add(ri->declared_family, name); - name = NULL; + smartlist_add_strdup(ri->declared_family, name); } } else if (router_digest_is_me(member->identity)) { /* Don't list ourself in our own family; that's redundant */ @@ -2238,15 +2318,11 @@ router_build_fresh_descriptor(routerinfo_t **r, extrainfo_t **e) if (smartlist_contains_string(warned_nonexistent_family, name)) smartlist_string_remove(warned_nonexistent_family, name); } - skip: - tor_free(name); - } SMARTLIST_FOREACH_END(name); + } /* remove duplicates from the list */ smartlist_sort_strings(ri->declared_family); smartlist_uniq_strings(ri->declared_family); - - smartlist_free(family); } /* Now generate the extrainfo. */ @@ -2762,7 +2838,7 @@ router_dump_router_to_string(routerinfo_t *router, make_ntor_onion_key_crosscert(ntor_keypair, &router->cache_info.signing_key_cert->signing_key, router->cache_info.published_on, - MIN_ONION_KEY_LIFETIME, &sign); + get_onion_key_lifetime(), &sign); if (!cert) { log_warn(LD_BUG,"make_ntor_onion_key_crosscert failed!"); goto err; @@ -2848,7 +2924,7 @@ router_dump_router_to_string(routerinfo_t *router, "onion-key\n%s" "signing-key\n%s" "%s%s" - "%s%s%s%s", + "%s%s%s", router->nickname, address, router->or_port, @@ -2871,8 +2947,7 @@ router_dump_router_to_string(routerinfo_t *router, ntor_cc_line ? ntor_cc_line : "", family_line, we_are_hibernating() ? "hibernating 1\n" : "", - "hidden-service-dir\n", - options->AllowSingleHopExits ? "allow-single-hop-exits\n" : ""); + "hidden-service-dir\n"); if (options->ContactInfo && strlen(options->ContactInfo)) { const char *ci = options->ContactInfo; @@ -2881,6 +2956,18 @@ router_dump_router_to_string(routerinfo_t *router, smartlist_add_asprintf(chunks, "contact %s\n", ci); } + if (options->BridgeRelay) { + const char *bd; + if (options->BridgeDistribution && strlen(options->BridgeDistribution)) { + bd = options->BridgeDistribution; + } else { + bd = "any"; + } + if (strchr(bd, '\n') || strchr(bd, '\r')) + bd = escaped(bd); + smartlist_add_asprintf(chunks, "bridge-distribution-request %s\n", bd); + } + if (router->onion_curve25519_pkey) { char kbuf[128]; base64_encode(kbuf, sizeof(kbuf), @@ -2942,7 +3029,6 @@ router_dump_router_to_string(routerinfo_t *router, crypto_digest_smartlist(digest, DIGEST_LEN, chunks, "", DIGEST_SHA1); - note_crypto_pk_op(SIGN_RTR); { char *sig; if (!(sig = router_get_dirobj_signature(digest, DIGEST_LEN, ident_key))) { @@ -2973,7 +3059,7 @@ router_dump_router_to_string(routerinfo_t *router, tor_free(s_dup); routerinfo_free(ri_tmp); } -#endif +#endif /* defined(DEBUG_ROUTER_DUMP_ROUTER_TO_STRING) */ goto done; @@ -3201,6 +3287,12 @@ extrainfo_dump_to_string(char **s_out, extrainfo_t *extrainfo, } } + if (options->PaddingStatistics) { + contents = rep_hist_get_padding_count_lines(); + if (contents) + smartlist_add(chunks, contents); + } + /* Add information about the pluggable transports we support. */ if (options->ServerTransportPlugin) { char *pluggable_transports = pt_get_extra_info_descriptor_string(); @@ -3417,7 +3509,7 @@ router_get_description(char *buf, const routerinfo_t *ri) return "<null>"; return format_node_description(buf, ri->cache_info.identity_digest, - router_is_named(ri), + 0, ri->nickname, NULL, ri->addr); @@ -3527,7 +3619,7 @@ routerstatus_describe(const routerstatus_t *rs) return routerstatus_get_description(buf, rs); } -/** Return a human-readable description of the extend_info_t <b>ri</b>. +/** Return a human-readable description of the extend_info_t <b>ei</b>. * * This function is not thread-safe. Each call to this function invalidates * previous values returned by this function. @@ -3543,21 +3635,16 @@ extend_info_describe(const extend_info_t *ei) * verbose representation of the identity of <b>router</b>. The format is: * A dollar sign. * The upper-case hexadecimal encoding of the SHA1 hash of router's identity. - * A "=" if the router is named; a "~" if it is not. + * A "=" if the router is named (no longer implemented); a "~" if it is not. * The router's nickname. **/ void router_get_verbose_nickname(char *buf, const routerinfo_t *router) { - const char *good_digest = networkstatus_get_router_digest_by_nickname( - router->nickname); - int is_named = good_digest && tor_memeq(good_digest, - router->cache_info.identity_digest, - DIGEST_LEN); buf[0] = '$'; base16_encode(buf+1, HEX_DIGEST_LEN+1, router->cache_info.identity_digest, DIGEST_LEN); - buf[1+HEX_DIGEST_LEN] = is_named ? '=' : '~'; + buf[1+HEX_DIGEST_LEN] = '~'; strlcpy(buf+1+HEX_DIGEST_LEN+1, router->nickname, MAX_NICKNAME_LEN+1); } |