diff options
Diffstat (limited to 'src/feature/dirparse/routerparse.c')
| -rw-r--r-- | src/feature/dirparse/routerparse.c | 1646 |
1 files changed, 1 insertions, 1645 deletions
diff --git a/src/feature/dirparse/routerparse.c b/src/feature/dirparse/routerparse.c index daeb67c917..956e8f3eae 100644 --- a/src/feature/dirparse/routerparse.c +++ b/src/feature/dirparse/routerparse.c @@ -193,110 +193,6 @@ static token_rule_t extrainfo_token_table[] = { END_OF_TABLE }; -/** List of tokens recognized in the body part of v3 networkstatus - * documents. */ -static token_rule_t rtrstatus_token_table[] = { - T01("p", K_P, CONCAT_ARGS, NO_OBJ ), - T1( "r", K_R, GE(7), NO_OBJ ), - T0N("a", K_A, GE(1), NO_OBJ ), - T1( "s", K_S, ARGS, NO_OBJ ), - T01("v", K_V, CONCAT_ARGS, NO_OBJ ), - T01("w", K_W, ARGS, NO_OBJ ), - T0N("m", K_M, CONCAT_ARGS, NO_OBJ ), - T0N("id", K_ID, GE(2), NO_OBJ ), - T01("pr", K_PROTO, CONCAT_ARGS, NO_OBJ ), - T0N("opt", K_OPT, CONCAT_ARGS, OBJ_OK ), - END_OF_TABLE -}; - -/** List of tokens recognized in V3 networkstatus votes. */ -static token_rule_t networkstatus_token_table[] = { - T1_START("network-status-version", K_NETWORK_STATUS_VERSION, - GE(1), NO_OBJ ), - T1("vote-status", K_VOTE_STATUS, GE(1), NO_OBJ ), - T1("published", K_PUBLISHED, CONCAT_ARGS, NO_OBJ ), - T1("valid-after", K_VALID_AFTER, CONCAT_ARGS, NO_OBJ ), - T1("fresh-until", K_FRESH_UNTIL, CONCAT_ARGS, NO_OBJ ), - T1("valid-until", K_VALID_UNTIL, CONCAT_ARGS, NO_OBJ ), - T1("voting-delay", K_VOTING_DELAY, GE(2), NO_OBJ ), - T1("known-flags", K_KNOWN_FLAGS, ARGS, NO_OBJ ), - T01("params", K_PARAMS, ARGS, NO_OBJ ), - T( "fingerprint", K_FINGERPRINT, CONCAT_ARGS, NO_OBJ ), - T01("signing-ed25519", K_SIGNING_CERT_ED, NO_ARGS , NEED_OBJ ), - T01("shared-rand-participate",K_SR_FLAG, NO_ARGS, NO_OBJ ), - T0N("shared-rand-commit", K_COMMIT, GE(3), NO_OBJ ), - T01("shared-rand-previous-value", K_PREVIOUS_SRV,EQ(2), NO_OBJ ), - T01("shared-rand-current-value", K_CURRENT_SRV, EQ(2), NO_OBJ ), - T0N("package", K_PACKAGE, CONCAT_ARGS, NO_OBJ ), - T01("recommended-client-protocols", K_RECOMMENDED_CLIENT_PROTOCOLS, - CONCAT_ARGS, NO_OBJ ), - T01("recommended-relay-protocols", K_RECOMMENDED_RELAY_PROTOCOLS, - CONCAT_ARGS, NO_OBJ ), - T01("required-client-protocols", K_REQUIRED_CLIENT_PROTOCOLS, - CONCAT_ARGS, NO_OBJ ), - T01("required-relay-protocols", K_REQUIRED_RELAY_PROTOCOLS, - CONCAT_ARGS, NO_OBJ ), - -#include "feature/dirparse/authcert_members.i" - - T0N("opt", K_OPT, CONCAT_ARGS, OBJ_OK ), - T1( "contact", K_CONTACT, CONCAT_ARGS, NO_OBJ ), - T1( "dir-source", K_DIR_SOURCE, GE(6), NO_OBJ ), - T01("legacy-dir-key", K_LEGACY_DIR_KEY, GE(1), NO_OBJ ), - T1( "known-flags", K_KNOWN_FLAGS, CONCAT_ARGS, NO_OBJ ), - T01("client-versions", K_CLIENT_VERSIONS, CONCAT_ARGS, NO_OBJ ), - T01("server-versions", K_SERVER_VERSIONS, CONCAT_ARGS, NO_OBJ ), - T1( "consensus-methods", K_CONSENSUS_METHODS, GE(1), NO_OBJ ), - - END_OF_TABLE -}; - -/** List of tokens recognized in V3 networkstatus consensuses. */ -static token_rule_t networkstatus_consensus_token_table[] = { - T1_START("network-status-version", K_NETWORK_STATUS_VERSION, - GE(1), NO_OBJ ), - T1("vote-status", K_VOTE_STATUS, GE(1), NO_OBJ ), - T1("valid-after", K_VALID_AFTER, CONCAT_ARGS, NO_OBJ ), - T1("fresh-until", K_FRESH_UNTIL, CONCAT_ARGS, NO_OBJ ), - T1("valid-until", K_VALID_UNTIL, CONCAT_ARGS, NO_OBJ ), - T1("voting-delay", K_VOTING_DELAY, GE(2), NO_OBJ ), - - T0N("opt", K_OPT, CONCAT_ARGS, OBJ_OK ), - - T1N("dir-source", K_DIR_SOURCE, GE(6), NO_OBJ ), - T1N("contact", K_CONTACT, CONCAT_ARGS, NO_OBJ ), - T1N("vote-digest", K_VOTE_DIGEST, GE(1), NO_OBJ ), - - T1( "known-flags", K_KNOWN_FLAGS, CONCAT_ARGS, NO_OBJ ), - - T01("client-versions", K_CLIENT_VERSIONS, CONCAT_ARGS, NO_OBJ ), - T01("server-versions", K_SERVER_VERSIONS, CONCAT_ARGS, NO_OBJ ), - T01("consensus-method", K_CONSENSUS_METHOD, EQ(1), NO_OBJ), - T01("params", K_PARAMS, ARGS, NO_OBJ ), - - T01("shared-rand-previous-value", K_PREVIOUS_SRV, EQ(2), NO_OBJ ), - T01("shared-rand-current-value", K_CURRENT_SRV, EQ(2), NO_OBJ ), - - T01("recommended-client-protocols", K_RECOMMENDED_CLIENT_PROTOCOLS, - CONCAT_ARGS, NO_OBJ ), - T01("recommended-relay-protocols", K_RECOMMENDED_RELAY_PROTOCOLS, - CONCAT_ARGS, NO_OBJ ), - T01("required-client-protocols", K_REQUIRED_CLIENT_PROTOCOLS, - CONCAT_ARGS, NO_OBJ ), - T01("required-relay-protocols", K_REQUIRED_RELAY_PROTOCOLS, - CONCAT_ARGS, NO_OBJ ), - - END_OF_TABLE -}; - -/** List of tokens recognized in the footer of v1 directory footers. */ -static token_rule_t networkstatus_vote_footer_token_table[] = { - T01("directory-footer", K_DIRECTORY_FOOTER, NO_ARGS, NO_OBJ ), - T01("bandwidth-weights", K_BW_WEIGHTS, ARGS, NO_OBJ ), - T( "directory-signature", K_DIRECTORY_SIGNATURE, GE(2), NEED_OBJ ), - END_OF_TABLE -}; - #undef T /* static function prototypes */ @@ -318,52 +214,6 @@ router_get_router_hash(const char *s, size_t s_len, char *digest) DIGEST_SHA1); } -/** Try to find the start and end of the signed portion of a networkstatus - * document in <b>s</b>. On success, set <b>start_out</b> to the first - * character of the document, and <b>end_out</b> to a position one after the - * final character of the signed document, and return 0. On failure, return - * -1. */ -int -router_get_networkstatus_v3_signed_boundaries(const char *s, - const char **start_out, - const char **end_out) -{ - return router_get_hash_impl_helper(s, strlen(s), - "network-status-version", - "\ndirectory-signature", - ' ', LOG_INFO, - start_out, end_out); -} - -/** Set <b>digest_out</b> to the SHA3-256 digest of the signed portion of the - * networkstatus vote in <b>s</b> -- or of the entirety of <b>s</b> if no - * signed portion can be identified. Return 0 on success, -1 on failure. */ -int -router_get_networkstatus_v3_sha3_as_signed(uint8_t *digest_out, - const char *s) -{ - const char *start, *end; - if (router_get_networkstatus_v3_signed_boundaries(s, &start, &end) < 0) { - start = s; - end = s + strlen(s); - } - tor_assert(start); - tor_assert(end); - return crypto_digest256((char*)digest_out, start, end-start, - DIGEST_SHA3_256); -} - -/** Set <b>digests</b> to all the digests of the consensus document in - * <b>s</b> */ -int -router_get_networkstatus_v3_hashes(const char *s, common_digests_t *digests) -{ - return router_get_hashes_impl(s,strlen(s),digests, - "network-status-version", - "\ndirectory-signature", - ' '); -} - /** Set <b>digest</b> to the SHA-1 digest of the hash of the <b>s_len</b>-byte * extrainfo string at <b>s</b>. Return 0 on success, -1 on failure. */ int @@ -1351,93 +1201,10 @@ extrainfo_parse_entry_from_string(const char *s, const char *end, return extrainfo; } -/** Helper: given a string <b>s</b>, return the start of the next router-status - * object (starting with "r " at the start of a line). If none is found, - * return the start of the directory footer, or the next directory signature. - * If none is found, return the end of the string. */ -static inline const char * -find_start_of_next_routerstatus(const char *s) -{ - const char *eos, *footer, *sig; - if ((eos = strstr(s, "\nr "))) - ++eos; - else - eos = s + strlen(s); - - footer = tor_memstr(s, eos-s, "\ndirectory-footer"); - sig = tor_memstr(s, eos-s, "\ndirectory-signature"); - - if (footer && sig) - return MIN(footer, sig) + 1; - else if (footer) - return footer+1; - else if (sig) - return sig+1; - else - return eos; -} - -/** Parse the GuardFraction string from a consensus or vote. - * - * If <b>vote</b> or <b>vote_rs</b> are set the document getting - * parsed is a vote routerstatus. Otherwise it's a consensus. This is - * the same semantic as in routerstatus_parse_entry_from_string(). */ -STATIC int -routerstatus_parse_guardfraction(const char *guardfraction_str, - networkstatus_t *vote, - vote_routerstatus_t *vote_rs, - routerstatus_t *rs) -{ - int ok; - const char *end_of_header = NULL; - int is_consensus = !vote_rs; - uint32_t guardfraction; - - tor_assert(bool_eq(vote, vote_rs)); - - /* If this info comes from a consensus, but we should't apply - guardfraction, just exit. */ - if (is_consensus && !should_apply_guardfraction(NULL)) { - return 0; - } - - end_of_header = strchr(guardfraction_str, '='); - if (!end_of_header) { - return -1; - } - - guardfraction = (uint32_t)tor_parse_ulong(end_of_header+1, - 10, 0, 100, &ok, NULL); - if (!ok) { - log_warn(LD_DIR, "Invalid GuardFraction %s", escaped(guardfraction_str)); - return -1; - } - - log_debug(LD_GENERAL, "[*] Parsed %s guardfraction '%s' for '%s'.", - is_consensus ? "consensus" : "vote", - guardfraction_str, rs->nickname); - - if (!is_consensus) { /* We are parsing a vote */ - vote_rs->status.guardfraction_percentage = guardfraction; - vote_rs->status.has_guardfraction = 1; - } else { - /* We are parsing a consensus. Only apply guardfraction to guards. */ - if (rs->is_possible_guard) { - rs->guardfraction_percentage = guardfraction; - rs->has_guardfraction = 1; - } else { - log_warn(LD_BUG, "Got GuardFraction for non-guard %s. " - "This is not supposed to happen. Not applying. ", rs->nickname); - } - } - - return 0; -} - /** Summarize the protocols listed in <b>protocols</b> into <b>out</b>, * falling back or correcting them based on <b>version</b> as appropriate. */ -STATIC void +void summarize_protover_flags(protover_summary_flags_t *out, const char *protocols, const char *version) @@ -1478,1417 +1245,6 @@ summarize_protover_flags(protover_summary_flags_t *out, } } -/** Given a string at *<b>s</b>, containing a routerstatus object, and an - * empty smartlist at <b>tokens</b>, parse and return the first router status - * object in the string, and advance *<b>s</b> to just after the end of the - * router status. Return NULL and advance *<b>s</b> on error. - * - * If <b>vote</b> and <b>vote_rs</b> are provided, don't allocate a fresh - * routerstatus but use <b>vote_rs</b> instead. - * - * If <b>consensus_method</b> is nonzero, this routerstatus is part of a - * consensus, and we should parse it according to the method used to - * make that consensus. - * - * Parse according to the syntax used by the consensus flavor <b>flav</b>. - **/ -STATIC routerstatus_t * -routerstatus_parse_entry_from_string(memarea_t *area, - const char **s, smartlist_t *tokens, - networkstatus_t *vote, - vote_routerstatus_t *vote_rs, - int consensus_method, - consensus_flavor_t flav) -{ - const char *eos, *s_dup = *s; - routerstatus_t *rs = NULL; - directory_token_t *tok; - char timebuf[ISO_TIME_LEN+1]; - struct in_addr in; - int offset = 0; - tor_assert(tokens); - tor_assert(bool_eq(vote, vote_rs)); - - if (!consensus_method) - flav = FLAV_NS; - tor_assert(flav == FLAV_NS || flav == FLAV_MICRODESC); - - eos = find_start_of_next_routerstatus(*s); - - if (tokenize_string(area,*s, eos, tokens, rtrstatus_token_table,0)) { - log_warn(LD_DIR, "Error tokenizing router status"); - goto err; - } - if (smartlist_len(tokens) < 1) { - log_warn(LD_DIR, "Impossibly short router status"); - goto err; - } - tok = find_by_keyword(tokens, K_R); - tor_assert(tok->n_args >= 7); /* guaranteed by GE(7) in K_R setup */ - if (flav == FLAV_NS) { - if (tok->n_args < 8) { - log_warn(LD_DIR, "Too few arguments to r"); - goto err; - } - } else if (flav == FLAV_MICRODESC) { - offset = -1; /* There is no descriptor digest in an md consensus r line */ - } - - if (vote_rs) { - rs = &vote_rs->status; - } else { - rs = tor_malloc_zero(sizeof(routerstatus_t)); - } - - if (!is_legal_nickname(tok->args[0])) { - log_warn(LD_DIR, - "Invalid nickname %s in router status; skipping.", - escaped(tok->args[0])); - goto err; - } - strlcpy(rs->nickname, tok->args[0], sizeof(rs->nickname)); - - if (digest_from_base64(rs->identity_digest, tok->args[1])) { - log_warn(LD_DIR, "Error decoding identity digest %s", - escaped(tok->args[1])); - goto err; - } - - if (flav == FLAV_NS) { - if (digest_from_base64(rs->descriptor_digest, tok->args[2])) { - log_warn(LD_DIR, "Error decoding descriptor digest %s", - escaped(tok->args[2])); - goto err; - } - } - - if (tor_snprintf(timebuf, sizeof(timebuf), "%s %s", - tok->args[3+offset], tok->args[4+offset]) < 0 || - parse_iso_time(timebuf, &rs->published_on)<0) { - log_warn(LD_DIR, "Error parsing time '%s %s' [%d %d]", - tok->args[3+offset], tok->args[4+offset], - offset, (int)flav); - goto err; - } - - if (tor_inet_aton(tok->args[5+offset], &in) == 0) { - log_warn(LD_DIR, "Error parsing router address in network-status %s", - escaped(tok->args[5+offset])); - goto err; - } - rs->addr = ntohl(in.s_addr); - - rs->or_port = (uint16_t) tor_parse_long(tok->args[6+offset], - 10,0,65535,NULL,NULL); - rs->dir_port = (uint16_t) tor_parse_long(tok->args[7+offset], - 10,0,65535,NULL,NULL); - - { - smartlist_t *a_lines = find_all_by_keyword(tokens, K_A); - if (a_lines) { - find_single_ipv6_orport(a_lines, &rs->ipv6_addr, &rs->ipv6_orport); - smartlist_free(a_lines); - } - } - - tok = find_opt_by_keyword(tokens, K_S); - if (tok && vote) { - int i; - vote_rs->flags = 0; - for (i=0; i < tok->n_args; ++i) { - int p = smartlist_string_pos(vote->known_flags, tok->args[i]); - if (p >= 0) { - vote_rs->flags |= (UINT64_C(1)<<p); - } else { - log_warn(LD_DIR, "Flags line had a flag %s not listed in known_flags.", - escaped(tok->args[i])); - goto err; - } - } - } else if (tok) { - /* This is a consensus, not a vote. */ - int i; - for (i=0; i < tok->n_args; ++i) { - if (!strcmp(tok->args[i], "Exit")) - rs->is_exit = 1; - else if (!strcmp(tok->args[i], "Stable")) - rs->is_stable = 1; - else if (!strcmp(tok->args[i], "Fast")) - rs->is_fast = 1; - else if (!strcmp(tok->args[i], "Running")) - rs->is_flagged_running = 1; - else if (!strcmp(tok->args[i], "Named")) - rs->is_named = 1; - else if (!strcmp(tok->args[i], "Valid")) - rs->is_valid = 1; - else if (!strcmp(tok->args[i], "Guard")) - rs->is_possible_guard = 1; - else if (!strcmp(tok->args[i], "BadExit")) - rs->is_bad_exit = 1; - else if (!strcmp(tok->args[i], "Authority")) - rs->is_authority = 1; - else if (!strcmp(tok->args[i], "Unnamed") && - consensus_method >= 2) { - /* Unnamed is computed right by consensus method 2 and later. */ - rs->is_unnamed = 1; - } else if (!strcmp(tok->args[i], "HSDir")) { - rs->is_hs_dir = 1; - } else if (!strcmp(tok->args[i], "V2Dir")) { - rs->is_v2_dir = 1; - } - } - /* These are implied true by having been included in a consensus made - * with a given method */ - rs->is_flagged_running = 1; /* Starting with consensus method 4. */ - rs->is_valid = 1; /* Starting with consensus method 24. */ - } - { - const char *protocols = NULL, *version = NULL; - if ((tok = find_opt_by_keyword(tokens, K_PROTO))) { - tor_assert(tok->n_args == 1); - protocols = tok->args[0]; - } - if ((tok = find_opt_by_keyword(tokens, K_V))) { - tor_assert(tok->n_args == 1); - version = tok->args[0]; - if (vote_rs) { - vote_rs->version = tor_strdup(tok->args[0]); - } - } - - summarize_protover_flags(&rs->pv, protocols, version); - } - - /* handle weighting/bandwidth info */ - if ((tok = find_opt_by_keyword(tokens, K_W))) { - int i; - for (i=0; i < tok->n_args; ++i) { - if (!strcmpstart(tok->args[i], "Bandwidth=")) { - int ok; - rs->bandwidth_kb = - (uint32_t)tor_parse_ulong(strchr(tok->args[i], '=')+1, - 10, 0, UINT32_MAX, - &ok, NULL); - if (!ok) { - log_warn(LD_DIR, "Invalid Bandwidth %s", escaped(tok->args[i])); - goto err; - } - rs->has_bandwidth = 1; - } else if (!strcmpstart(tok->args[i], "Measured=") && vote_rs) { - int ok; - vote_rs->measured_bw_kb = - (uint32_t)tor_parse_ulong(strchr(tok->args[i], '=')+1, - 10, 0, UINT32_MAX, &ok, NULL); - if (!ok) { - log_warn(LD_DIR, "Invalid Measured Bandwidth %s", - escaped(tok->args[i])); - goto err; - } - vote_rs->has_measured_bw = 1; - vote->has_measured_bws = 1; - } else if (!strcmpstart(tok->args[i], "Unmeasured=1")) { - rs->bw_is_unmeasured = 1; - } else if (!strcmpstart(tok->args[i], "GuardFraction=")) { - if (routerstatus_parse_guardfraction(tok->args[i], - vote, vote_rs, rs) < 0) { - goto err; - } - } - } - } - - /* parse exit policy summaries */ - if ((tok = find_opt_by_keyword(tokens, K_P))) { - tor_assert(tok->n_args == 1); - if (strcmpstart(tok->args[0], "accept ") && - strcmpstart(tok->args[0], "reject ")) { - log_warn(LD_DIR, "Unknown exit policy summary type %s.", - escaped(tok->args[0])); - goto err; - } - /* XXX weasel: parse this into ports and represent them somehow smart, - * maybe not here but somewhere on if we need it for the client. - * we should still parse it here to check it's valid tho. - */ - rs->exitsummary = tor_strdup(tok->args[0]); - rs->has_exitsummary = 1; - } - - if (vote_rs) { - SMARTLIST_FOREACH_BEGIN(tokens, directory_token_t *, t) { - if (t->tp == K_M && t->n_args) { - vote_microdesc_hash_t *line = - tor_malloc(sizeof(vote_microdesc_hash_t)); - line->next = vote_rs->microdesc; - line->microdesc_hash_line = tor_strdup(t->args[0]); - vote_rs->microdesc = line; - } - if (t->tp == K_ID) { - tor_assert(t->n_args >= 2); - if (!strcmp(t->args[0], "ed25519")) { - vote_rs->has_ed25519_listing = 1; - if (strcmp(t->args[1], "none") && - digest256_from_base64((char*)vote_rs->ed25519_id, - t->args[1])<0) { - log_warn(LD_DIR, "Bogus ed25519 key in networkstatus vote"); - goto err; - } - } - } - if (t->tp == K_PROTO) { - tor_assert(t->n_args == 1); - vote_rs->protocols = tor_strdup(t->args[0]); - } - } SMARTLIST_FOREACH_END(t); - } else if (flav == FLAV_MICRODESC) { - tok = find_opt_by_keyword(tokens, K_M); - if (tok) { - tor_assert(tok->n_args); - if (digest256_from_base64(rs->descriptor_digest, tok->args[0])) { - log_warn(LD_DIR, "Error decoding microdescriptor digest %s", - escaped(tok->args[0])); - goto err; - } - } else { - log_info(LD_BUG, "Found an entry in networkstatus with no " - "microdescriptor digest. (Router %s ($%s) at %s:%d.)", - rs->nickname, hex_str(rs->identity_digest, DIGEST_LEN), - fmt_addr32(rs->addr), rs->or_port); - } - } - - if (!strcasecmp(rs->nickname, UNNAMED_ROUTER_NICKNAME)) - rs->is_named = 0; - - goto done; - err: - dump_desc(s_dup, "routerstatus entry"); - if (rs && !vote_rs) - routerstatus_free(rs); - rs = NULL; - done: - SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t)); - smartlist_clear(tokens); - if (area) { - DUMP_AREA(area, "routerstatus entry"); - memarea_clear(area); - } - *s = eos; - - return rs; -} - -int -compare_vote_routerstatus_entries(const void **_a, const void **_b) -{ - const vote_routerstatus_t *a = *_a, *b = *_b; - return fast_memcmp(a->status.identity_digest, b->status.identity_digest, - DIGEST_LEN); -} - -/** Verify the bandwidth weights of a network status document */ -int -networkstatus_verify_bw_weights(networkstatus_t *ns, int consensus_method) -{ - int64_t G=0, M=0, E=0, D=0, T=0; - double Wgg, Wgm, Wgd, Wmg, Wmm, Wme, Wmd, Weg, Wem, Wee, Wed; - double Gtotal=0, Mtotal=0, Etotal=0; - const char *casename = NULL; - int valid = 1; - (void) consensus_method; - - const int64_t weight_scale = networkstatus_get_weight_scale_param(ns); - tor_assert(weight_scale >= 1); - Wgg = networkstatus_get_bw_weight(ns, "Wgg", -1); - Wgm = networkstatus_get_bw_weight(ns, "Wgm", -1); - Wgd = networkstatus_get_bw_weight(ns, "Wgd", -1); - Wmg = networkstatus_get_bw_weight(ns, "Wmg", -1); - Wmm = networkstatus_get_bw_weight(ns, "Wmm", -1); - Wme = networkstatus_get_bw_weight(ns, "Wme", -1); - Wmd = networkstatus_get_bw_weight(ns, "Wmd", -1); - Weg = networkstatus_get_bw_weight(ns, "Weg", -1); - Wem = networkstatus_get_bw_weight(ns, "Wem", -1); - Wee = networkstatus_get_bw_weight(ns, "Wee", -1); - Wed = networkstatus_get_bw_weight(ns, "Wed", -1); - - if (Wgg<0 || Wgm<0 || Wgd<0 || Wmg<0 || Wmm<0 || Wme<0 || Wmd<0 || Weg<0 - || Wem<0 || Wee<0 || Wed<0) { - log_warn(LD_BUG, "No bandwidth weights produced in consensus!"); - return 0; - } - - // First, sanity check basic summing properties that hold for all cases - // We use > 1 as the check for these because they are computed as integers. - // Sometimes there are rounding errors. - if (fabs(Wmm - weight_scale) > 1) { - log_warn(LD_BUG, "Wmm=%f != %"PRId64, - Wmm, (weight_scale)); - valid = 0; - } - - if (fabs(Wem - Wee) > 1) { - log_warn(LD_BUG, "Wem=%f != Wee=%f", Wem, Wee); - valid = 0; - } - - if (fabs(Wgm - Wgg) > 1) { - log_warn(LD_BUG, "Wgm=%f != Wgg=%f", Wgm, Wgg); - valid = 0; - } - - if (fabs(Weg - Wed) > 1) { - log_warn(LD_BUG, "Wed=%f != Weg=%f", Wed, Weg); - valid = 0; - } - - if (fabs(Wgg + Wmg - weight_scale) > 0.001*weight_scale) { - log_warn(LD_BUG, "Wgg=%f != %"PRId64" - Wmg=%f", Wgg, - (weight_scale), Wmg); - valid = 0; - } - - if (fabs(Wee + Wme - weight_scale) > 0.001*weight_scale) { - log_warn(LD_BUG, "Wee=%f != %"PRId64" - Wme=%f", Wee, - (weight_scale), Wme); - valid = 0; - } - - if (fabs(Wgd + Wmd + Wed - weight_scale) > 0.001*weight_scale) { - log_warn(LD_BUG, "Wgd=%f + Wmd=%f + Wed=%f != %"PRId64, - Wgd, Wmd, Wed, (weight_scale)); - valid = 0; - } - - Wgg /= weight_scale; - Wgm /= weight_scale; (void) Wgm; // unused from here on. - Wgd /= weight_scale; - - Wmg /= weight_scale; - Wmm /= weight_scale; - Wme /= weight_scale; - Wmd /= weight_scale; - - Weg /= weight_scale; (void) Weg; // unused from here on. - Wem /= weight_scale; (void) Wem; // unused from here on. - Wee /= weight_scale; - Wed /= weight_scale; - - // Then, gather G, M, E, D, T to determine case - SMARTLIST_FOREACH_BEGIN(ns->routerstatus_list, routerstatus_t *, rs) { - int is_exit = 0; - /* Bug #2203: Don't count bad exits as exits for balancing */ - is_exit = rs->is_exit && !rs->is_bad_exit; - if (rs->has_bandwidth) { - T += rs->bandwidth_kb; - if (is_exit && rs->is_possible_guard) { - D += rs->bandwidth_kb; - Gtotal += Wgd*rs->bandwidth_kb; - Mtotal += Wmd*rs->bandwidth_kb; - Etotal += Wed*rs->bandwidth_kb; - } else if (is_exit) { - E += rs->bandwidth_kb; - Mtotal += Wme*rs->bandwidth_kb; - Etotal += Wee*rs->bandwidth_kb; - } else if (rs->is_possible_guard) { - G += rs->bandwidth_kb; - Gtotal += Wgg*rs->bandwidth_kb; - Mtotal += Wmg*rs->bandwidth_kb; - } else { - M += rs->bandwidth_kb; - Mtotal += Wmm*rs->bandwidth_kb; - } - } else { - log_warn(LD_BUG, "Missing consensus bandwidth for router %s", - routerstatus_describe(rs)); - } - } SMARTLIST_FOREACH_END(rs); - - // Finally, check equality conditions depending upon case 1, 2 or 3 - // Full equality cases: 1, 3b - // Partial equality cases: 2b (E=G), 3a (M=E) - // Fully unknown: 2a - if (3*E >= T && 3*G >= T) { - // Case 1: Neither are scarce - casename = "Case 1"; - if (fabs(Etotal-Mtotal) > 0.01*MAX(Etotal,Mtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Etotal %f != Mtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Etotal, Mtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - if (fabs(Etotal-Gtotal) > 0.01*MAX(Etotal,Gtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Etotal %f != Gtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Etotal, Gtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - if (fabs(Gtotal-Mtotal) > 0.01*MAX(Gtotal,Mtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Mtotal %f != Gtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Mtotal, Gtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - } else if (3*E < T && 3*G < T) { - int64_t R = MIN(E, G); - int64_t S = MAX(E, G); - /* - * Case 2: Both Guards and Exits are scarce - * Balance D between E and G, depending upon - * D capacity and scarcity. Devote no extra - * bandwidth to middle nodes. - */ - if (R+D < S) { // Subcase a - double Rtotal, Stotal; - if (E < G) { - Rtotal = Etotal; - Stotal = Gtotal; - } else { - Rtotal = Gtotal; - Stotal = Etotal; - } - casename = "Case 2a"; - // Rtotal < Stotal - if (Rtotal > Stotal) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Rtotal %f > Stotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Rtotal, Stotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - // Rtotal < T/3 - if (3*Rtotal > T) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: 3*Rtotal %f > T " - "%"PRId64". G=%"PRId64" M=%"PRId64" E=%"PRId64 - " D=%"PRId64" T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Rtotal*3, (T), - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - // Stotal < T/3 - if (3*Stotal > T) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: 3*Stotal %f > T " - "%"PRId64". G=%"PRId64" M=%"PRId64" E=%"PRId64 - " D=%"PRId64" T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Stotal*3, (T), - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - // Mtotal > T/3 - if (3*Mtotal < T) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: 3*Mtotal %f < T " - "%"PRId64". " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Mtotal*3, (T), - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - } else { // Subcase b: R+D > S - casename = "Case 2b"; - - /* Check the rare-M redirect case. */ - if (D != 0 && 3*M < T) { - casename = "Case 2b (balanced)"; - if (fabs(Etotal-Mtotal) > 0.01*MAX(Etotal,Mtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Etotal %f != Mtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Etotal, Mtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - if (fabs(Etotal-Gtotal) > 0.01*MAX(Etotal,Gtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Etotal %f != Gtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Etotal, Gtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - if (fabs(Gtotal-Mtotal) > 0.01*MAX(Gtotal,Mtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Mtotal %f != Gtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Mtotal, Gtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - } else { - if (fabs(Etotal-Gtotal) > 0.01*MAX(Etotal,Gtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Etotal %f != Gtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Etotal, Gtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - } - } - } else { // if (E < T/3 || G < T/3) { - int64_t S = MIN(E, G); - int64_t NS = MAX(E, G); - if (3*(S+D) < T) { // Subcase a: - double Stotal; - double NStotal; - if (G < E) { - casename = "Case 3a (G scarce)"; - Stotal = Gtotal; - NStotal = Etotal; - } else { // if (G >= E) { - casename = "Case 3a (E scarce)"; - NStotal = Gtotal; - Stotal = Etotal; - } - // Stotal < T/3 - if (3*Stotal > T) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: 3*Stotal %f > T " - "%"PRId64". G=%"PRId64" M=%"PRId64" E=%"PRId64 - " D=%"PRId64" T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Stotal*3, (T), - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - if (NS >= M) { - if (fabs(NStotal-Mtotal) > 0.01*MAX(NStotal,Mtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: NStotal %f != Mtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, NStotal, Mtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - } else { - // if NS < M, NStotal > T/3 because only one of G or E is scarce - if (3*NStotal < T) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: 3*NStotal %f < T " - "%"PRId64". G=%"PRId64" M=%"PRId64 - " E=%"PRId64" D=%"PRId64" T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, NStotal*3, (T), - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - } - } else { // Subcase b: S+D >= T/3 - casename = "Case 3b"; - if (fabs(Etotal-Mtotal) > 0.01*MAX(Etotal,Mtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Etotal %f != Mtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Etotal, Mtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - if (fabs(Etotal-Gtotal) > 0.01*MAX(Etotal,Gtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Etotal %f != Gtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Etotal, Gtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - if (fabs(Gtotal-Mtotal) > 0.01*MAX(Gtotal,Mtotal)) { - log_warn(LD_DIR, - "Bw Weight Failure for %s: Mtotal %f != Gtotal %f. " - "G=%"PRId64" M=%"PRId64" E=%"PRId64" D=%"PRId64 - " T=%"PRId64". " - "Wgg=%f Wgd=%f Wmg=%f Wme=%f Wmd=%f Wee=%f Wed=%f", - casename, Mtotal, Gtotal, - (G), (M), (E), - (D), (T), - Wgg, Wgd, Wmg, Wme, Wmd, Wee, Wed); - valid = 0; - } - } - } - - if (valid) - log_notice(LD_DIR, "Bandwidth-weight %s is verified and valid.", - casename); - - return valid; -} - -/** Check if a shared random value of type <b>srv_type</b> is in - * <b>tokens</b>. If there is, parse it and set it to <b>srv_out</b>. Return - * -1 on failure, 0 on success. The resulting srv is allocated on the heap and - * it's the responsibility of the caller to free it. */ -static int -extract_one_srv(smartlist_t *tokens, directory_keyword srv_type, - sr_srv_t **srv_out) -{ - int ret = -1; - directory_token_t *tok; - sr_srv_t *srv = NULL; - smartlist_t *chunks; - - tor_assert(tokens); - - chunks = smartlist_new(); - tok = find_opt_by_keyword(tokens, srv_type); - if (!tok) { - /* That's fine, no SRV is allowed. */ - ret = 0; - goto end; - } - for (int i = 0; i < tok->n_args; i++) { - smartlist_add(chunks, tok->args[i]); - } - srv = sr_parse_srv(chunks); - if (srv == NULL) { - log_warn(LD_DIR, "SR: Unparseable SRV %s", escaped(tok->object_body)); - goto end; - } - /* All is good. */ - *srv_out = srv; - ret = 0; - end: - smartlist_free(chunks); - return ret; -} - -/** Extract any shared random values found in <b>tokens</b> and place them in - * the networkstatus <b>ns</b>. */ -static void -extract_shared_random_srvs(networkstatus_t *ns, smartlist_t *tokens) -{ - const char *voter_identity; - networkstatus_voter_info_t *voter; - - tor_assert(ns); - tor_assert(tokens); - /* Can be only one of them else code flow. */ - tor_assert(ns->type == NS_TYPE_VOTE || ns->type == NS_TYPE_CONSENSUS); - - if (ns->type == NS_TYPE_VOTE) { - voter = smartlist_get(ns->voters, 0); - tor_assert(voter); - voter_identity = hex_str(voter->identity_digest, - sizeof(voter->identity_digest)); - } else { - /* Consensus has multiple voters so no specific voter. */ - voter_identity = "consensus"; - } - - /* We extract both, and on error everything is stopped because it means - * the vote is malformed for the shared random value(s). */ - if (extract_one_srv(tokens, K_PREVIOUS_SRV, &ns->sr_info.previous_srv) < 0) { - log_warn(LD_DIR, "SR: Unable to parse previous SRV from %s", - voter_identity); - /* Maybe we have a chance with the current SRV so let's try it anyway. */ - } - if (extract_one_srv(tokens, K_CURRENT_SRV, &ns->sr_info.current_srv) < 0) { - log_warn(LD_DIR, "SR: Unable to parse current SRV from %s", - voter_identity); - } -} - -/** Parse a v3 networkstatus vote, opinion, or consensus (depending on - * ns_type), from <b>s</b>, and return the result. Return NULL on failure. */ -networkstatus_t * -networkstatus_parse_vote_from_string(const char *s, const char **eos_out, - networkstatus_type_t ns_type) -{ - smartlist_t *tokens = smartlist_new(); - smartlist_t *rs_tokens = NULL, *footer_tokens = NULL; - networkstatus_voter_info_t *voter = NULL; - networkstatus_t *ns = NULL; - common_digests_t ns_digests; - uint8_t sha3_as_signed[DIGEST256_LEN]; - const char *cert, *end_of_header, *end_of_footer, *s_dup = s; - directory_token_t *tok; - struct in_addr in; - int i, inorder, n_signatures = 0; - memarea_t *area = NULL, *rs_area = NULL; - consensus_flavor_t flav = FLAV_NS; - char *last_kwd=NULL; - - tor_assert(s); - - if (eos_out) - *eos_out = NULL; - - if (router_get_networkstatus_v3_hashes(s, &ns_digests) || - router_get_networkstatus_v3_sha3_as_signed(sha3_as_signed, s)<0) { - log_warn(LD_DIR, "Unable to compute digest of network-status"); - goto err; - } - - area = memarea_new(); - end_of_header = find_start_of_next_routerstatus(s); - if (tokenize_string(area, s, end_of_header, tokens, - (ns_type == NS_TYPE_CONSENSUS) ? - networkstatus_consensus_token_table : - networkstatus_token_table, 0)) { - log_warn(LD_DIR, "Error tokenizing network-status header"); - goto err; - } - - ns = tor_malloc_zero(sizeof(networkstatus_t)); - memcpy(&ns->digests, &ns_digests, sizeof(ns_digests)); - memcpy(&ns->digest_sha3_as_signed, sha3_as_signed, sizeof(sha3_as_signed)); - - tok = find_by_keyword(tokens, K_NETWORK_STATUS_VERSION); - tor_assert(tok); - if (tok->n_args > 1) { - int flavor = networkstatus_parse_flavor_name(tok->args[1]); - if (flavor < 0) { - log_warn(LD_DIR, "Can't parse document with unknown flavor %s", - escaped(tok->args[1])); - goto err; - } - ns->flavor = flav = flavor; - } - if (flav != FLAV_NS && ns_type != NS_TYPE_CONSENSUS) { - log_warn(LD_DIR, "Flavor found on non-consensus networkstatus."); - goto err; - } - - if (ns_type != NS_TYPE_CONSENSUS) { - const char *end_of_cert = NULL; - if (!(cert = strstr(s, "\ndir-key-certificate-version"))) - goto err; - ++cert; - ns->cert = authority_cert_parse_from_string(cert, &end_of_cert); - if (!ns->cert || !end_of_cert || end_of_cert > end_of_header) - goto err; - } - - tok = find_by_keyword(tokens, K_VOTE_STATUS); - tor_assert(tok->n_args); - if (!strcmp(tok->args[0], "vote")) { - ns->type = NS_TYPE_VOTE; - } else if (!strcmp(tok->args[0], "consensus")) { - ns->type = NS_TYPE_CONSENSUS; - } else if (!strcmp(tok->args[0], "opinion")) { - ns->type = NS_TYPE_OPINION; - } else { - log_warn(LD_DIR, "Unrecognized vote status %s in network-status", - escaped(tok->args[0])); - goto err; - } - if (ns_type != ns->type) { - log_warn(LD_DIR, "Got the wrong kind of v3 networkstatus."); - goto err; - } - - if (ns->type == NS_TYPE_VOTE || ns->type == NS_TYPE_OPINION) { - tok = find_by_keyword(tokens, K_PUBLISHED); - if (parse_iso_time(tok->args[0], &ns->published)) - goto err; - - ns->supported_methods = smartlist_new(); - tok = find_opt_by_keyword(tokens, K_CONSENSUS_METHODS); - if (tok) { - for (i=0; i < tok->n_args; ++i) - smartlist_add_strdup(ns->supported_methods, tok->args[i]); - } else { - smartlist_add_strdup(ns->supported_methods, "1"); - } - } else { - tok = find_opt_by_keyword(tokens, K_CONSENSUS_METHOD); - if (tok) { - int num_ok; - ns->consensus_method = (int)tor_parse_long(tok->args[0], 10, 1, INT_MAX, - &num_ok, NULL); - if (!num_ok) - goto err; - } else { - ns->consensus_method = 1; - } - } - - if ((tok = find_opt_by_keyword(tokens, K_RECOMMENDED_CLIENT_PROTOCOLS))) - ns->recommended_client_protocols = tor_strdup(tok->args[0]); - if ((tok = find_opt_by_keyword(tokens, K_RECOMMENDED_RELAY_PROTOCOLS))) - ns->recommended_relay_protocols = tor_strdup(tok->args[0]); - if ((tok = find_opt_by_keyword(tokens, K_REQUIRED_CLIENT_PROTOCOLS))) - ns->required_client_protocols = tor_strdup(tok->args[0]); - if ((tok = find_opt_by_keyword(tokens, K_REQUIRED_RELAY_PROTOCOLS))) - ns->required_relay_protocols = tor_strdup(tok->args[0]); - - tok = find_by_keyword(tokens, K_VALID_AFTER); - if (parse_iso_time(tok->args[0], &ns->valid_after)) - goto err; - - tok = find_by_keyword(tokens, K_FRESH_UNTIL); - if (parse_iso_time(tok->args[0], &ns->fresh_until)) - goto err; - - tok = find_by_keyword(tokens, K_VALID_UNTIL); - if (parse_iso_time(tok->args[0], &ns->valid_until)) - goto err; - - tok = find_by_keyword(tokens, K_VOTING_DELAY); - tor_assert(tok->n_args >= 2); - { - int ok; - ns->vote_seconds = - (int) tor_parse_long(tok->args[0], 10, 0, INT_MAX, &ok, NULL); - if (!ok) - goto err; - ns->dist_seconds = - (int) tor_parse_long(tok->args[1], 10, 0, INT_MAX, &ok, NULL); - if (!ok) - goto err; - } - if (ns->valid_after + - (get_options()->TestingTorNetwork ? - MIN_VOTE_INTERVAL_TESTING : MIN_VOTE_INTERVAL) > ns->fresh_until) { - log_warn(LD_DIR, "Vote/consensus freshness interval is too short"); - goto err; - } - if (ns->valid_after + - (get_options()->TestingTorNetwork ? - MIN_VOTE_INTERVAL_TESTING : MIN_VOTE_INTERVAL)*2 > ns->valid_until) { - log_warn(LD_DIR, "Vote/consensus liveness interval is too short"); - goto err; - } - if (ns->vote_seconds < MIN_VOTE_SECONDS) { - log_warn(LD_DIR, "Vote seconds is too short"); - goto err; - } - if (ns->dist_seconds < MIN_DIST_SECONDS) { - log_warn(LD_DIR, "Dist seconds is too short"); - goto err; - } - - if ((tok = find_opt_by_keyword(tokens, K_CLIENT_VERSIONS))) { - ns->client_versions = tor_strdup(tok->args[0]); - } - if ((tok = find_opt_by_keyword(tokens, K_SERVER_VERSIONS))) { - ns->server_versions = tor_strdup(tok->args[0]); - } - - { - smartlist_t *package_lst = find_all_by_keyword(tokens, K_PACKAGE); - ns->package_lines = smartlist_new(); - if (package_lst) { - SMARTLIST_FOREACH(package_lst, directory_token_t *, t, - smartlist_add_strdup(ns->package_lines, t->args[0])); - } - smartlist_free(package_lst); - } - - tok = find_by_keyword(tokens, K_KNOWN_FLAGS); - ns->known_flags = smartlist_new(); - inorder = 1; - for (i = 0; i < tok->n_args; ++i) { - smartlist_add_strdup(ns->known_flags, tok->args[i]); - if (i>0 && strcmp(tok->args[i-1], tok->args[i])>= 0) { - log_warn(LD_DIR, "%s >= %s", tok->args[i-1], tok->args[i]); - inorder = 0; - } - } - if (!inorder) { - log_warn(LD_DIR, "known-flags not in order"); - goto err; - } - if (ns->type != NS_TYPE_CONSENSUS && - smartlist_len(ns->known_flags) > MAX_KNOWN_FLAGS_IN_VOTE) { - /* If we allowed more than 64 flags in votes, then parsing them would make - * us invoke undefined behavior whenever we used 1<<flagnum to do a - * bit-shift. This is only for votes and opinions: consensus users don't - * care about flags they don't recognize, and so don't build a bitfield - * for them. */ - log_warn(LD_DIR, "Too many known-flags in consensus vote or opinion"); - goto err; - } - - tok = find_opt_by_keyword(tokens, K_PARAMS); - if (tok) { - int any_dups = 0; - inorder = 1; - ns->net_params = smartlist_new(); - for (i = 0; i < tok->n_args; ++i) { - int ok=0; - char *eq = strchr(tok->args[i], '='); - size_t eq_pos; - if (!eq) { - log_warn(LD_DIR, "Bad element '%s' in params", escaped(tok->args[i])); - goto err; - } - eq_pos = eq-tok->args[i]; - tor_parse_long(eq+1, 10, INT32_MIN, INT32_MAX, &ok, NULL); - if (!ok) { - log_warn(LD_DIR, "Bad element '%s' in params", escaped(tok->args[i])); - goto err; - } - if (i > 0 && strcmp(tok->args[i-1], tok->args[i]) >= 0) { - log_warn(LD_DIR, "%s >= %s", tok->args[i-1], tok->args[i]); - inorder = 0; - } - if (last_kwd && eq_pos == strlen(last_kwd) && - fast_memeq(last_kwd, tok->args[i], eq_pos)) { - log_warn(LD_DIR, "Duplicate value for %s parameter", - escaped(tok->args[i])); - any_dups = 1; - } - tor_free(last_kwd); - last_kwd = tor_strndup(tok->args[i], eq_pos); - smartlist_add_strdup(ns->net_params, tok->args[i]); - } - if (!inorder) { - log_warn(LD_DIR, "params not in order"); - goto err; - } - if (any_dups) { - log_warn(LD_DIR, "Duplicate in parameters"); - goto err; - } - } - - ns->voters = smartlist_new(); - - SMARTLIST_FOREACH_BEGIN(tokens, directory_token_t *, _tok) { - tok = _tok; - if (tok->tp == K_DIR_SOURCE) { - tor_assert(tok->n_args >= 6); - - if (voter) - smartlist_add(ns->voters, voter); - voter = tor_malloc_zero(sizeof(networkstatus_voter_info_t)); - voter->sigs = smartlist_new(); - if (ns->type != NS_TYPE_CONSENSUS) - memcpy(voter->vote_digest, ns_digests.d[DIGEST_SHA1], DIGEST_LEN); - - voter->nickname = tor_strdup(tok->args[0]); - if (strlen(tok->args[1]) != HEX_DIGEST_LEN || - base16_decode(voter->identity_digest, sizeof(voter->identity_digest), - tok->args[1], HEX_DIGEST_LEN) - != sizeof(voter->identity_digest)) { - log_warn(LD_DIR, "Error decoding identity digest %s in " - "network-status document.", escaped(tok->args[1])); - goto err; - } - if (ns->type != NS_TYPE_CONSENSUS && - tor_memneq(ns->cert->cache_info.identity_digest, - voter->identity_digest, DIGEST_LEN)) { - log_warn(LD_DIR,"Mismatch between identities in certificate and vote"); - goto err; - } - if (ns->type != NS_TYPE_CONSENSUS) { - if (authority_cert_is_blacklisted(ns->cert)) { - log_warn(LD_DIR, "Rejecting vote signature made with blacklisted " - "signing key %s", - hex_str(ns->cert->signing_key_digest, DIGEST_LEN)); - goto err; - } - } - voter->address = tor_strdup(tok->args[2]); - if (!tor_inet_aton(tok->args[3], &in)) { - log_warn(LD_DIR, "Error decoding IP address %s in network-status.", - escaped(tok->args[3])); - goto err; - } - voter->addr = ntohl(in.s_addr); - int ok; - voter->dir_port = (uint16_t) - tor_parse_long(tok->args[4], 10, 0, 65535, &ok, NULL); - if (!ok) - goto err; - voter->or_port = (uint16_t) - tor_parse_long(tok->args[5], 10, 0, 65535, &ok, NULL); - if (!ok) - goto err; - } else if (tok->tp == K_CONTACT) { - if (!voter || voter->contact) { - log_warn(LD_DIR, "contact element is out of place."); - goto err; - } - voter->contact = tor_strdup(tok->args[0]); - } else if (tok->tp == K_VOTE_DIGEST) { - tor_assert(ns->type == NS_TYPE_CONSENSUS); - tor_assert(tok->n_args >= 1); - if (!voter || ! tor_digest_is_zero(voter->vote_digest)) { - log_warn(LD_DIR, "vote-digest element is out of place."); - goto err; - } - if (strlen(tok->args[0]) != HEX_DIGEST_LEN || - base16_decode(voter->vote_digest, sizeof(voter->vote_digest), - tok->args[0], HEX_DIGEST_LEN) - != sizeof(voter->vote_digest)) { - log_warn(LD_DIR, "Error decoding vote digest %s in " - "network-status consensus.", escaped(tok->args[0])); - goto err; - } - } - } SMARTLIST_FOREACH_END(_tok); - if (voter) { - smartlist_add(ns->voters, voter); - voter = NULL; - } - if (smartlist_len(ns->voters) == 0) { - log_warn(LD_DIR, "Missing dir-source elements in a networkstatus."); - goto err; - } else if (ns->type != NS_TYPE_CONSENSUS && smartlist_len(ns->voters) != 1) { - log_warn(LD_DIR, "Too many dir-source elements in a vote networkstatus."); - goto err; - } - - if (ns->type != NS_TYPE_CONSENSUS && - (tok = find_opt_by_keyword(tokens, K_LEGACY_DIR_KEY))) { - int bad = 1; - if (strlen(tok->args[0]) == HEX_DIGEST_LEN) { - networkstatus_voter_info_t *voter_0 = smartlist_get(ns->voters, 0); - if (base16_decode(voter_0->legacy_id_digest, DIGEST_LEN, - tok->args[0], HEX_DIGEST_LEN) != DIGEST_LEN) - bad = 1; - else - bad = 0; - } - if (bad) { - log_warn(LD_DIR, "Invalid legacy key digest %s on vote.", - escaped(tok->args[0])); - } - } - - /* If this is a vote document, check if information about the shared - randomness protocol is included, and extract it. */ - if (ns->type == NS_TYPE_VOTE) { - dirvote_parse_sr_commits(ns, tokens); - } - /* For both a vote and consensus, extract the shared random values. */ - if (ns->type == NS_TYPE_VOTE || ns->type == NS_TYPE_CONSENSUS) { - extract_shared_random_srvs(ns, tokens); - } - - /* Parse routerstatus lines. */ - rs_tokens = smartlist_new(); - rs_area = memarea_new(); - s = end_of_header; - ns->routerstatus_list = smartlist_new(); - - while (!strcmpstart(s, "r ")) { - if (ns->type != NS_TYPE_CONSENSUS) { - vote_routerstatus_t *rs = tor_malloc_zero(sizeof(vote_routerstatus_t)); - if (routerstatus_parse_entry_from_string(rs_area, &s, rs_tokens, ns, - rs, 0, 0)) { - smartlist_add(ns->routerstatus_list, rs); - } else { - vote_routerstatus_free(rs); - } - } else { - routerstatus_t *rs; - if ((rs = routerstatus_parse_entry_from_string(rs_area, &s, rs_tokens, - NULL, NULL, - ns->consensus_method, - flav))) { - /* Use exponential-backoff scheduling when downloading microdescs */ - smartlist_add(ns->routerstatus_list, rs); - } - } - } - for (i = 1; i < smartlist_len(ns->routerstatus_list); ++i) { - routerstatus_t *rs1, *rs2; - if (ns->type != NS_TYPE_CONSENSUS) { - vote_routerstatus_t *a = smartlist_get(ns->routerstatus_list, i-1); - vote_routerstatus_t *b = smartlist_get(ns->routerstatus_list, i); - rs1 = &a->status; rs2 = &b->status; - } else { - rs1 = smartlist_get(ns->routerstatus_list, i-1); - rs2 = smartlist_get(ns->routerstatus_list, i); - } - if (fast_memcmp(rs1->identity_digest, rs2->identity_digest, DIGEST_LEN) - >= 0) { - log_warn(LD_DIR, "Networkstatus entries not sorted by identity digest"); - goto err; - } - } - if (ns_type != NS_TYPE_CONSENSUS) { - digest256map_t *ed_id_map = digest256map_new(); - SMARTLIST_FOREACH_BEGIN(ns->routerstatus_list, vote_routerstatus_t *, - vrs) { - if (! vrs->has_ed25519_listing || - tor_mem_is_zero((const char *)vrs->ed25519_id, DIGEST256_LEN)) - continue; - if (digest256map_get(ed_id_map, vrs->ed25519_id) != NULL) { - log_warn(LD_DIR, "Vote networkstatus ed25519 identities were not " - "unique"); - digest256map_free(ed_id_map, NULL); - goto err; - } - digest256map_set(ed_id_map, vrs->ed25519_id, (void*)1); - } SMARTLIST_FOREACH_END(vrs); - digest256map_free(ed_id_map, NULL); - } - - /* Parse footer; check signature. */ - footer_tokens = smartlist_new(); - if ((end_of_footer = strstr(s, "\nnetwork-status-version "))) - ++end_of_footer; - else - end_of_footer = s + strlen(s); - if (tokenize_string(area,s, end_of_footer, footer_tokens, - networkstatus_vote_footer_token_table, 0)) { - log_warn(LD_DIR, "Error tokenizing network-status vote footer."); - goto err; - } - - { - int found_sig = 0; - SMARTLIST_FOREACH_BEGIN(footer_tokens, directory_token_t *, _tok) { - tok = _tok; - if (tok->tp == K_DIRECTORY_SIGNATURE) - found_sig = 1; - else if (found_sig) { - log_warn(LD_DIR, "Extraneous token after first directory-signature"); - goto err; - } - } SMARTLIST_FOREACH_END(_tok); - } - - if ((tok = find_opt_by_keyword(footer_tokens, K_DIRECTORY_FOOTER))) { - if (tok != smartlist_get(footer_tokens, 0)) { - log_warn(LD_DIR, "Misplaced directory-footer token"); - goto err; - } - } - - tok = find_opt_by_keyword(footer_tokens, K_BW_WEIGHTS); - if (tok) { - ns->weight_params = smartlist_new(); - for (i = 0; i < tok->n_args; ++i) { - int ok=0; - char *eq = strchr(tok->args[i], '='); - if (!eq) { - log_warn(LD_DIR, "Bad element '%s' in weight params", - escaped(tok->args[i])); - goto err; - } - tor_parse_long(eq+1, 10, INT32_MIN, INT32_MAX, &ok, NULL); - if (!ok) { - log_warn(LD_DIR, "Bad element '%s' in params", escaped(tok->args[i])); - goto err; - } - smartlist_add_strdup(ns->weight_params, tok->args[i]); - } - } - - SMARTLIST_FOREACH_BEGIN(footer_tokens, directory_token_t *, _tok) { - char declared_identity[DIGEST_LEN]; - networkstatus_voter_info_t *v; - document_signature_t *sig; - const char *id_hexdigest = NULL; - const char *sk_hexdigest = NULL; - digest_algorithm_t alg = DIGEST_SHA1; - tok = _tok; - if (tok->tp != K_DIRECTORY_SIGNATURE) - continue; - tor_assert(tok->n_args >= 2); - if (tok->n_args == 2) { - id_hexdigest = tok->args[0]; - sk_hexdigest = tok->args[1]; - } else { - const char *algname = tok->args[0]; - int a; - id_hexdigest = tok->args[1]; - sk_hexdigest = tok->args[2]; - a = crypto_digest_algorithm_parse_name(algname); - if (a<0) { - log_warn(LD_DIR, "Unknown digest algorithm %s; skipping", - escaped(algname)); - continue; - } - alg = a; - } - - if (!tok->object_type || - strcmp(tok->object_type, "SIGNATURE") || - tok->object_size < 128 || tok->object_size > 512) { - log_warn(LD_DIR, "Bad object type or length on directory-signature"); - goto err; - } - - if (strlen(id_hexdigest) != HEX_DIGEST_LEN || - base16_decode(declared_identity, sizeof(declared_identity), - id_hexdigest, HEX_DIGEST_LEN) - != sizeof(declared_identity)) { - log_warn(LD_DIR, "Error decoding declared identity %s in " - "network-status document.", escaped(id_hexdigest)); - goto err; - } - if (!(v = networkstatus_get_voter_by_id(ns, declared_identity))) { - log_warn(LD_DIR, "ID on signature on network-status document does " - "not match any declared directory source."); - goto err; - } - sig = tor_malloc_zero(sizeof(document_signature_t)); - memcpy(sig->identity_digest, v->identity_digest, DIGEST_LEN); - sig->alg = alg; - if (strlen(sk_hexdigest) != HEX_DIGEST_LEN || - base16_decode(sig->signing_key_digest, sizeof(sig->signing_key_digest), - sk_hexdigest, HEX_DIGEST_LEN) - != sizeof(sig->signing_key_digest)) { - log_warn(LD_DIR, "Error decoding declared signing key digest %s in " - "network-status document.", escaped(sk_hexdigest)); - tor_free(sig); - goto err; - } - - if (ns->type != NS_TYPE_CONSENSUS) { - if (tor_memneq(declared_identity, ns->cert->cache_info.identity_digest, - DIGEST_LEN)) { - log_warn(LD_DIR, "Digest mismatch between declared and actual on " - "network-status vote."); - tor_free(sig); - goto err; - } - } - - if (networkstatus_get_voter_sig_by_alg(v, sig->alg)) { - /* We already parsed a vote with this algorithm from this voter. Use the - first one. */ - log_fn(LOG_PROTOCOL_WARN, LD_DIR, "We received a networkstatus " - "that contains two signatures from the same voter with the same " - "algorithm. Ignoring the second signature."); - tor_free(sig); - continue; - } - - if (ns->type != NS_TYPE_CONSENSUS) { - if (check_signature_token(ns_digests.d[DIGEST_SHA1], DIGEST_LEN, - tok, ns->cert->signing_key, 0, - "network-status document")) { - tor_free(sig); - goto err; - } - sig->good_signature = 1; - } else { - if (tok->object_size >= INT_MAX || tok->object_size >= SIZE_T_CEILING) { - tor_free(sig); - goto err; - } - sig->signature = tor_memdup(tok->object_body, tok->object_size); - sig->signature_len = (int) tok->object_size; - } - smartlist_add(v->sigs, sig); - - ++n_signatures; - } SMARTLIST_FOREACH_END(_tok); - - if (! n_signatures) { - log_warn(LD_DIR, "No signatures on networkstatus document."); - goto err; - } else if (ns->type == NS_TYPE_VOTE && n_signatures != 1) { - log_warn(LD_DIR, "Received more than one signature on a " - "network-status vote."); - goto err; - } - - if (eos_out) - *eos_out = end_of_footer; - - goto done; - err: - dump_desc(s_dup, "v3 networkstatus"); - networkstatus_vote_free(ns); - ns = NULL; - done: - if (tokens) { - SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t)); - smartlist_free(tokens); - } - if (voter) { - if (voter->sigs) { - SMARTLIST_FOREACH(voter->sigs, document_signature_t *, sig, - document_signature_free(sig)); - smartlist_free(voter->sigs); - } - tor_free(voter->nickname); - tor_free(voter->address); - tor_free(voter->contact); - tor_free(voter); - } - if (rs_tokens) { - SMARTLIST_FOREACH(rs_tokens, directory_token_t *, t, token_clear(t)); - smartlist_free(rs_tokens); - } - if (footer_tokens) { - SMARTLIST_FOREACH(footer_tokens, directory_token_t *, t, token_clear(t)); - smartlist_free(footer_tokens); - } - if (area) { - DUMP_AREA(area, "v3 networkstatus"); - memarea_drop_all(area); - } - if (rs_area) - memarea_drop_all(rs_area); - tor_free(last_kwd); - - return ns; -} - /** Parse the addr policy in the string <b>s</b> and return it. If * assume_action is nonnegative, then insert its action (ADDR_POLICY_ACCEPT or * ADDR_POLICY_REJECT) for items that specify no action. |