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|
- #define ROUTER_PRIVATE
- #include "or.h"
- #include "circuitbuild.h"
- #include "circuitlist.h"
- #include "circuituse.h"
- #include "config.h"
- #include "connection.h"
- #include "control.h"
- #include "crypto_rand.h"
- #include "crypto_util.h"
- #include "crypto_curve25519.h"
- #include "directory.h"
- #include "dirserv.h"
- #include "dns.h"
- #include "geoip.h"
- #include "hibernate.h"
- #include "main.h"
- #include "networkstatus.h"
- #include "nodelist.h"
- #include "policies.h"
- #include "protover.h"
- #include "relay.h"
- #include "rephist.h"
- #include "router.h"
- #include "routerkeys.h"
- #include "routerlist.h"
- #include "routerparse.h"
- #include "statefile.h"
- #include "torcert.h"
- #include "transports.h"
- #include "routerset.h"
- #include "dirauth/mode.h"
- static tor_mutex_t *key_lock=NULL;
- static time_t onionkey_set_at=0;
- static crypto_pk_t *onionkey=NULL;
- static crypto_pk_t *lastonionkey=NULL;
- static curve25519_keypair_t curve25519_onion_key;
- static curve25519_keypair_t last_curve25519_onion_key;
- static crypto_pk_t *server_identitykey=NULL;
- static char server_identitykey_digest[DIGEST_LEN];
- static crypto_pk_t *client_identitykey=NULL;
- static crypto_pk_t *authority_signing_key = NULL;
- static authority_cert_t *authority_key_certificate = NULL;
- static crypto_pk_t *legacy_signing_key = NULL;
- static authority_cert_t *legacy_key_certificate = NULL;
- const char *format_node_description(char *buf,
- const char *id_digest,
- int is_named,
- const char *nickname,
- const tor_addr_t *addr,
- uint32_t addr32h);
- static void
- set_onion_key(crypto_pk_t *k)
- {
- if (onionkey && crypto_pk_eq_keys(onionkey, k)) {
-
- crypto_pk_free(k);
- return;
- }
- tor_mutex_acquire(key_lock);
- crypto_pk_free(onionkey);
- onionkey = k;
- tor_mutex_release(key_lock);
- mark_my_descriptor_dirty("set onion key");
- }
- crypto_pk_t *
- get_onion_key(void)
- {
- tor_assert(onionkey);
- return onionkey;
- }
- void
- dup_onion_keys(crypto_pk_t **key, crypto_pk_t **last)
- {
- tor_assert(key);
- tor_assert(last);
- tor_mutex_acquire(key_lock);
- if (onionkey)
- *key = crypto_pk_copy_full(onionkey);
- else
- *key = NULL;
- if (lastonionkey)
- *last = crypto_pk_copy_full(lastonionkey);
- else
- *last = NULL;
- tor_mutex_release(key_lock);
- }
- void
- expire_old_onion_keys(void)
- {
- char *fname = NULL;
- tor_mutex_acquire(key_lock);
-
- if (lastonionkey) {
- crypto_pk_free(lastonionkey);
- lastonionkey = NULL;
- }
-
- memset(&last_curve25519_onion_key, 0, sizeof(last_curve25519_onion_key));
- tor_mutex_release(key_lock);
- fname = get_keydir_fname("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_keydir_fname("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);
- }
- static const curve25519_keypair_t *
- get_current_curve25519_keypair(void)
- {
- return &curve25519_onion_key;
- }
- di_digest256_map_t *
- construct_ntor_key_map(void)
- {
- di_digest256_map_t *m = NULL;
- if (!tor_mem_is_zero((const char*)
- curve25519_onion_key.pubkey.public_key,
- CURVE25519_PUBKEY_LEN)) {
- dimap_add_entry(&m,
- curve25519_onion_key.pubkey.public_key,
- tor_memdup(&curve25519_onion_key,
- sizeof(curve25519_keypair_t)));
- }
- if (!tor_mem_is_zero((const char*)
- last_curve25519_onion_key.pubkey.public_key,
- CURVE25519_PUBKEY_LEN)) {
- dimap_add_entry(&m,
- last_curve25519_onion_key.pubkey.public_key,
- tor_memdup(&last_curve25519_onion_key,
- sizeof(curve25519_keypair_t)));
- }
- return m;
- }
- static void
- ntor_key_map_free_helper(void *arg)
- {
- curve25519_keypair_t *k = arg;
- memwipe(k, 0, sizeof(*k));
- tor_free(k);
- }
- void
- ntor_key_map_free_(di_digest256_map_t *map)
- {
- if (!map)
- return;
- dimap_free(map, ntor_key_map_free_helper);
- }
- time_t
- get_onion_key_set_at(void)
- {
- return onionkey_set_at;
- }
- void
- set_server_identity_key(crypto_pk_t *k)
- {
- crypto_pk_free(server_identitykey);
- server_identitykey = k;
- 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);
- }
- }
- static void
- assert_identity_keys_ok(void)
- {
- if (1)
- return;
- tor_assert(client_identitykey);
- if (public_server_mode(get_options())) {
-
- tor_assert(server_identitykey);
- tor_assert(crypto_pk_eq_keys(client_identitykey, server_identitykey));
- } else {
-
- if (server_identitykey)
- tor_assert(!crypto_pk_eq_keys(client_identitykey, server_identitykey));
- }
- }
- crypto_pk_t *
- get_server_identity_key(void)
- {
- tor_assert(server_identitykey);
- tor_assert(server_mode(get_options()));
- assert_identity_keys_ok();
- return server_identitykey;
- }
- int
- server_identity_key_is_set(void)
- {
- return server_mode(get_options()) && server_identitykey != NULL;
- }
- void
- set_client_identity_key(crypto_pk_t *k)
- {
- crypto_pk_free(client_identitykey);
- client_identitykey = k;
- }
- crypto_pk_t *
- get_tlsclient_identity_key(void)
- {
- tor_assert(client_identitykey);
- assert_identity_keys_ok();
- return client_identitykey;
- }
- int
- client_identity_key_is_set(void)
- {
- return client_identitykey != NULL;
- }
- MOCK_IMPL(authority_cert_t *,
- get_my_v3_authority_cert, (void))
- {
- return authority_key_certificate;
- }
- crypto_pk_t *
- get_my_v3_authority_signing_key(void)
- {
- return authority_signing_key;
- }
- authority_cert_t *
- get_my_v3_legacy_cert(void)
- {
- return legacy_key_certificate;
- }
- crypto_pk_t *
- get_my_v3_legacy_signing_key(void)
- {
- return legacy_signing_key;
- }
- void
- rotate_onion_key(void)
- {
- char *fname, *fname_prev;
- crypto_pk_t *prkey = NULL;
- or_state_t *state = get_or_state();
- curve25519_keypair_t new_curve25519_keypair;
- time_t now;
- fname = get_keydir_fname("secret_onion_key");
- fname_prev = get_keydir_fname("secret_onion_key.old");
-
- if (file_status(fname) == FN_FILE) {
- if (replace_file(fname, fname_prev))
- goto error;
- }
- if (!(prkey = crypto_pk_new())) {
- log_err(LD_GENERAL,"Error constructing rotated onion key");
- goto error;
- }
- if (crypto_pk_generate_key(prkey)) {
- log_err(LD_BUG,"Error generating onion key");
- goto error;
- }
- if (crypto_pk_write_private_key_to_filename(prkey, fname)) {
- log_err(LD_FS,"Couldn't write generated onion key to \"%s\".", fname);
- goto error;
- }
- tor_free(fname);
- tor_free(fname_prev);
- fname = get_keydir_fname("secret_onion_key_ntor");
- fname_prev = get_keydir_fname("secret_onion_key_ntor.old");
- if (curve25519_keypair_generate(&new_curve25519_keypair, 1) < 0)
- goto error;
-
- if (file_status(fname) == FN_FILE) {
- if (replace_file(fname, fname_prev))
- goto error;
- }
- if (curve25519_keypair_write_to_file(&new_curve25519_keypair, fname,
- "onion") < 0) {
- log_err(LD_FS,"Couldn't write curve25519 onion key to \"%s\".",fname);
- goto error;
- }
- log_info(LD_GENERAL, "Rotating onion key");
- tor_mutex_acquire(key_lock);
- crypto_pk_free(lastonionkey);
- lastonionkey = onionkey;
- onionkey = prkey;
- memcpy(&last_curve25519_onion_key, &curve25519_onion_key,
- sizeof(curve25519_keypair_t));
- memcpy(&curve25519_onion_key, &new_curve25519_keypair,
- sizeof(curve25519_keypair_t));
- now = time(NULL);
- state->LastRotatedOnionKey = onionkey_set_at = now;
- tor_mutex_release(key_lock);
- mark_my_descriptor_dirty("rotated onion key");
- or_state_mark_dirty(state, get_options()->AvoidDiskWrites ? now+3600 : 0);
- goto done;
- error:
- log_warn(LD_GENERAL, "Couldn't rotate onion key.");
- if (prkey)
- crypto_pk_free(prkey);
- done:
- memwipe(&new_curve25519_keypair, 0, sizeof(new_curve25519_keypair));
- tor_free(fname);
- tor_free(fname_prev);
- }
- static void
- log_new_relay_greeting(void)
- {
- static int already_logged = 0;
- if (already_logged)
- return;
- tor_log(LOG_NOTICE, LD_GENERAL, "You are running a new relay. "
- "Thanks for helping the Tor network! If you wish to know "
- "what will happen in the upcoming weeks regarding its usage, "
- "have a look at https://blog.torproject.org/blog/lifecycle-of"
- "-a-new-relay");
- already_logged = 1;
- }
- crypto_pk_t *
- init_key_from_file(const char *fname, int generate, int severity,
- int log_greeting)
- {
- crypto_pk_t *prkey = NULL;
- if (!(prkey = crypto_pk_new())) {
- tor_log(severity, LD_GENERAL,"Error constructing key");
- goto error;
- }
- switch (file_status(fname)) {
- case FN_DIR:
- case FN_ERROR:
- tor_log(severity, LD_FS,"Can't read key from \"%s\"", fname);
- goto error;
-
- case FN_NOENT:
- case FN_EMPTY:
- if (generate) {
- if (!have_lockfile()) {
- if (try_locking(get_options(), 0)<0) {
-
- tor_log(severity, LD_FS, "Another Tor process has locked \"%s\". "
- "Not writing any new keys.", fname);
-
- goto error;
- }
- }
- log_info(LD_GENERAL, "No key found in \"%s\"; generating fresh key.",
- fname);
- if (crypto_pk_generate_key(prkey)) {
- tor_log(severity, LD_GENERAL,"Error generating onion key");
- goto error;
- }
- if (crypto_pk_check_key(prkey) <= 0) {
- tor_log(severity, LD_GENERAL,"Generated key seems invalid");
- goto error;
- }
- log_info(LD_GENERAL, "Generated key seems valid");
- if (log_greeting) {
- log_new_relay_greeting();
- }
- if (crypto_pk_write_private_key_to_filename(prkey, fname)) {
- tor_log(severity, LD_FS,
- "Couldn't write generated key to \"%s\".", fname);
- goto error;
- }
- } else {
- tor_log(severity, LD_GENERAL, "No key found in \"%s\"", fname);
- goto error;
- }
- return prkey;
- case FN_FILE:
- if (crypto_pk_read_private_key_from_filename(prkey, fname)) {
- tor_log(severity, LD_GENERAL,"Error loading private key.");
- goto error;
- }
- return prkey;
- default:
- tor_assert(0);
- }
- error:
- if (prkey)
- crypto_pk_free(prkey);
- return NULL;
- }
- static int
- init_curve25519_keypair_from_file(curve25519_keypair_t *keys_out,
- const char *fname,
- int generate,
- int severity,
- const char *tag)
- {
- switch (file_status(fname)) {
- case FN_DIR:
- case FN_ERROR:
- tor_log(severity, LD_FS,"Can't read key from \"%s\"", fname);
- goto error;
-
- case FN_NOENT:
- case FN_EMPTY:
- if (generate) {
- if (!have_lockfile()) {
- if (try_locking(get_options(), 0)<0) {
-
- tor_log(severity, LD_FS, "Another Tor process has locked \"%s\". "
- "Not writing any new keys.", fname);
-
- goto error;
- }
- }
- log_info(LD_GENERAL, "No key found in \"%s\"; generating fresh key.",
- fname);
- if (curve25519_keypair_generate(keys_out, 1) < 0)
- goto error;
- if (curve25519_keypair_write_to_file(keys_out, fname, tag)<0) {
- tor_log(severity, LD_FS,
- "Couldn't write generated key to \"%s\".", fname);
- memwipe(keys_out, 0, sizeof(*keys_out));
- goto error;
- }
- } else {
- log_info(LD_GENERAL, "No key found in \"%s\"", fname);
- }
- return 0;
- case FN_FILE:
- {
- char *tag_in=NULL;
- if (curve25519_keypair_read_from_file(keys_out, &tag_in, fname) < 0) {
- tor_log(severity, LD_GENERAL,"Error loading private key.");
- tor_free(tag_in);
- goto error;
- }
- if (!tag_in || strcmp(tag_in, tag)) {
- tor_log(severity, LD_GENERAL,"Unexpected tag %s on private key.",
- escaped(tag_in));
- tor_free(tag_in);
- goto error;
- }
- tor_free(tag_in);
- return 0;
- }
- default:
- tor_assert(0);
- }
- error:
- return -1;
- }
- static int
- load_authority_keyset(int legacy, crypto_pk_t **key_out,
- authority_cert_t **cert_out)
- {
- int r = -1;
- char *fname = NULL, *cert = NULL;
- const char *eos = NULL;
- crypto_pk_t *signing_key = NULL;
- authority_cert_t *parsed = NULL;
- fname = get_keydir_fname(
- legacy ? "legacy_signing_key" : "authority_signing_key");
- signing_key = init_key_from_file(fname, 0, LOG_ERR, 0);
- if (!signing_key) {
- log_warn(LD_DIR, "No version 3 directory key found in %s", fname);
- goto done;
- }
- tor_free(fname);
- fname = get_keydir_fname(
- legacy ? "legacy_certificate" : "authority_certificate");
- cert = read_file_to_str(fname, 0, NULL);
- if (!cert) {
- log_warn(LD_DIR, "Signing key found, but no certificate found in %s",
- fname);
- goto done;
- }
- parsed = authority_cert_parse_from_string(cert, &eos);
- if (!parsed) {
- log_warn(LD_DIR, "Unable to parse certificate in %s", fname);
- goto done;
- }
- if (!crypto_pk_eq_keys(signing_key, parsed->signing_key)) {
- log_warn(LD_DIR, "Stored signing key does not match signing key in "
- "certificate");
- goto done;
- }
- crypto_pk_free(*key_out);
- authority_cert_free(*cert_out);
- *key_out = signing_key;
- *cert_out = parsed;
- r = 0;
- signing_key = NULL;
- parsed = NULL;
- done:
- tor_free(fname);
- tor_free(cert);
- crypto_pk_free(signing_key);
- authority_cert_free(parsed);
- return r;
- }
- static int
- init_v3_authority_keys(void)
- {
- if (load_authority_keyset(0, &authority_signing_key,
- &authority_key_certificate)<0)
- return -1;
- if (get_options()->V3AuthUseLegacyKey &&
- load_authority_keyset(1, &legacy_signing_key,
- &legacy_key_certificate)<0)
- return -1;
- return 0;
- }
- void
- v3_authority_check_key_expiry(void)
- {
- time_t now, expires;
- static time_t last_warned = 0;
- int badness, time_left, warn_interval;
- if (!authdir_mode_v3(get_options()) || !authority_key_certificate)
- return;
- now = time(NULL);
- expires = authority_key_certificate->expires;
- time_left = (int)( expires - now );
- if (time_left <= 0) {
- badness = LOG_ERR;
- warn_interval = 60*60;
- } else if (time_left <= 24*60*60) {
- badness = LOG_WARN;
- warn_interval = 60*60;
- } else if (time_left <= 24*60*60*7) {
- badness = LOG_WARN;
- warn_interval = 24*60*60;
- } else if (time_left <= 24*60*60*30) {
- badness = LOG_WARN;
- warn_interval = 24*60*60*5;
- } else {
- return;
- }
- if (last_warned + warn_interval > now)
- return;
- if (time_left <= 0) {
- tor_log(badness, LD_DIR, "Your v3 authority certificate has expired."
- " Generate a new one NOW.");
- } else if (time_left <= 24*60*60) {
- tor_log(badness, LD_DIR, "Your v3 authority certificate expires in %d "
- "hours; Generate a new one NOW.", time_left/(60*60));
- } else {
- tor_log(badness, LD_DIR, "Your v3 authority certificate expires in %d "
- "days; Generate a new one soon.", time_left/(24*60*60));
- }
- last_warned = now;
- }
- 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);
- }
- int
- get_onion_key_lifetime(void)
- {
- return get_onion_key_rotation_days_()*24*60*60;
- }
- 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;
- }
- int
- router_initialize_tls_context(void)
- {
- unsigned int flags = 0;
- const or_options_t *options = get_options();
- int lifetime = options->SSLKeyLifetime;
- if (public_server_mode(options))
- flags |= TOR_TLS_CTX_IS_PUBLIC_SERVER;
- if (!lifetime) {
-
- unsigned int five_days = 5*24*3600;
- unsigned int one_year = 365*24*3600;
- lifetime = crypto_rand_int_range(five_days, one_year);
- lifetime -= lifetime % (24*3600);
- if (crypto_rand_int(2)) {
-
- lifetime--;
- }
- }
-
- return tor_tls_context_init(flags,
- get_tlsclient_identity_key(),
- server_mode(options) ?
- get_server_identity_key() : NULL,
- (unsigned int)lifetime);
- }
- STATIC int
- router_write_fingerprint(int hashed)
- {
- char *keydir = NULL, *cp = NULL;
- const char *fname = hashed ? "hashed-fingerprint" :
- "fingerprint";
- char fingerprint[FINGERPRINT_LEN+1];
- const or_options_t *options = get_options();
- char *fingerprint_line = NULL;
- int result = -1;
- keydir = get_datadir_fname(fname);
- log_info(LD_GENERAL,"Dumping %sfingerprint to \"%s\"...",
- hashed ? "hashed " : "", keydir);
- if (!hashed) {
- if (crypto_pk_get_fingerprint(get_server_identity_key(),
- fingerprint, 0) < 0) {
- log_err(LD_GENERAL,"Error computing fingerprint");
- goto done;
- }
- } else {
- if (crypto_pk_get_hashed_fingerprint(get_server_identity_key(),
- fingerprint) < 0) {
- log_err(LD_GENERAL,"Error computing hashed fingerprint");
- goto done;
- }
- }
- tor_asprintf(&fingerprint_line, "%s %s\n", options->Nickname, fingerprint);
-
- cp = read_file_to_str(keydir, RFTS_IGNORE_MISSING, NULL);
- if (!cp || strcmp(cp, fingerprint_line)) {
- if (write_str_to_file(keydir, fingerprint_line, 0)) {
- log_err(LD_FS, "Error writing %sfingerprint line to file",
- hashed ? "hashed " : "");
- goto done;
- }
- }
- log_notice(LD_GENERAL, "Your Tor %s identity key fingerprint is '%s %s'",
- hashed ? "bridge's hashed" : "server's", options->Nickname,
- fingerprint);
- result = 0;
- done:
- tor_free(cp);
- tor_free(keydir);
- tor_free(fingerprint_line);
- return result;
- }
- static int
- init_keys_common(void)
- {
- if (!key_lock)
- key_lock = tor_mutex_new();
-
- if (crypto_global_init(get_options()->HardwareAccel,
- get_options()->AccelName,
- get_options()->AccelDir)) {
- log_err(LD_BUG, "Unable to initialize OpenSSL. Exiting.");
- return -1;
- }
- return 0;
- }
- int
- init_keys_client(void)
- {
- crypto_pk_t *prkey;
- if (init_keys_common() < 0)
- return -1;
- if (!(prkey = crypto_pk_new()))
- return -1;
- if (crypto_pk_generate_key(prkey)) {
- crypto_pk_free(prkey);
- return -1;
- }
- set_client_identity_key(prkey);
-
- if (router_initialize_tls_context() < 0) {
- log_err(LD_GENERAL,"Error creating TLS context for Tor client.");
- return -1;
- }
- return 0;
- }
- int
- init_keys(void)
- {
- char *keydir;
- const char *mydesc;
- crypto_pk_t *prkey;
- char digest[DIGEST_LEN];
- char v3_digest[DIGEST_LEN];
- const or_options_t *options = get_options();
- dirinfo_type_t type;
- time_t now = time(NULL);
- dir_server_t *ds;
- int v3_digest_set = 0;
- authority_cert_t *cert = NULL;
-
- if (!server_mode(options)) {
- return init_keys_client();
- }
- if (init_keys_common() < 0)
- return -1;
- if (create_keys_directory(options) < 0)
- return -1;
-
- memset(v3_digest, 0, sizeof(v3_digest));
- if (authdir_mode_v3(options)) {
- if (init_v3_authority_keys()<0) {
- log_err(LD_GENERAL, "We're configured as a V3 authority, but we "
- "were unable to load our v3 authority keys and certificate! "
- "Use tor-gencert to generate them. Dying.");
- return -1;
- }
- cert = get_my_v3_authority_cert();
- if (cert) {
- 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;
- }
- }
-
- keydir = get_keydir_fname("secret_id_key");
- log_info(LD_GENERAL,"Reading/making identity key \"%s\"...",keydir);
- prkey = init_key_from_file(keydir, 1, LOG_ERR, 1);
- tor_free(keydir);
- if (!prkey) return -1;
- set_server_identity_key(prkey);
-
- if (public_server_mode(options)) {
- set_client_identity_key(crypto_pk_dup_key(prkey));
- } else {
- if (!(prkey = crypto_pk_new()))
- return -1;
- if (crypto_pk_generate_key(prkey)) {
- crypto_pk_free(prkey);
- return -1;
- }
- set_client_identity_key(prkey);
- }
-
- const int new_signing_key = load_ed_keys(options,now);
- if (new_signing_key < 0)
- return -1;
-
- keydir = get_keydir_fname("secret_onion_key");
- log_info(LD_GENERAL,"Reading/making onion key \"%s\"...",keydir);
- prkey = init_key_from_file(keydir, 1, LOG_ERR, 1);
- tor_free(keydir);
- if (!prkey) return -1;
- set_onion_key(prkey);
- if (options->command == CMD_RUN_TOR) {
-
- or_state_t *state = get_or_state();
- if (state->LastRotatedOnionKey > 100 && state->LastRotatedOnionKey < now) {
-
- onionkey_set_at = state->LastRotatedOnionKey;
- } else {
-
- state->LastRotatedOnionKey = onionkey_set_at = now;
- or_state_mark_dirty(state, options->AvoidDiskWrites ?
- time(NULL)+3600 : 0);
- }
- }
- keydir = get_keydir_fname("secret_onion_key.old");
- if (!lastonionkey && file_status(keydir) == FN_FILE) {
-
- prkey = init_key_from_file(keydir, 0, LOG_ERR, 0);
- if (prkey)
- lastonionkey = prkey;
- }
- tor_free(keydir);
- {
-
- int r;
- keydir = get_keydir_fname("secret_onion_key_ntor");
- r = init_curve25519_keypair_from_file(&curve25519_onion_key,
- keydir, 1, LOG_ERR, "onion");
- tor_free(keydir);
- if (r<0)
- return -1;
- keydir = get_keydir_fname("secret_onion_key_ntor.old");
- if (tor_mem_is_zero((const char *)
- last_curve25519_onion_key.pubkey.public_key,
- CURVE25519_PUBKEY_LEN) &&
- file_status(keydir) == FN_FILE) {
-
- init_curve25519_keypair_from_file(&last_curve25519_onion_key,
- keydir, 0, LOG_ERR, "onion");
- }
- tor_free(keydir);
- }
-
- if (router_initialize_tls_context() < 0) {
- log_err(LD_GENERAL,"Error initializing TLS context");
- return -1;
- }
-
- if (generate_ed_link_cert(options, now, new_signing_key > 0) < 0) {
- log_err(LD_GENERAL,"Couldn't make link cert");
- return -1;
- }
-
-
- mydesc = router_get_my_descriptor();
- if (authdir_mode_v3(options)) {
- const char *m = NULL;
- routerinfo_t *ri;
-
- if (dirserv_add_own_fingerprint(get_server_identity_key())) {
- log_err(LD_GENERAL,"Error adding own fingerprint to set of relays");
- return -1;
- }
- if (mydesc) {
- was_router_added_t added;
- ri = router_parse_entry_from_string(mydesc, NULL, 1, 0, NULL, NULL);
- if (!ri) {
- log_err(LD_GENERAL,"Generated a routerinfo we couldn't parse.");
- return -1;
- }
- added = dirserv_add_descriptor(ri, &m, "self");
- if (!WRA_WAS_ADDED(added)) {
- if (!WRA_WAS_OUTDATED(added)) {
- log_err(LD_GENERAL, "Unable to add own descriptor to directory: %s",
- m?m:"<unknown error>");
- return -1;
- } else {
-
- log_info(LD_GENERAL, "Couldn't add own descriptor to directory "
- "after key init: %s This is usually not a problem.",
- m?m:"<unknown error>");
- }
- }
- }
- }
-
- if (router_write_fingerprint(0)) {
- log_err(LD_FS, "Error writing fingerprint to file");
- return -1;
- }
- if (!public_server_mode(options) && router_write_fingerprint(1)) {
- log_err(LD_FS, "Error writing hashed fingerprint to file");
- return -1;
- }
- if (!authdir_mode(options))
- return 0;
-
- if (dirserv_load_fingerprint_file() < 0) {
- log_err(LD_GENERAL,"Error loading fingerprints");
- return -1;
- }
-
- crypto_pk_get_digest(get_server_identity_key(), digest);
- type = ((options->V3AuthoritativeDir ?
- (V3_DIRINFO|MICRODESC_DIRINFO|EXTRAINFO_DIRINFO) : NO_DIRINFO) |
- (options->BridgeAuthoritativeDir ? BRIDGE_DIRINFO : NO_DIRINFO));
- ds = router_get_trusteddirserver_by_digest(digest);
- if (!ds) {
- ds = trusted_dir_server_new(options->Nickname, NULL,
- router_get_advertised_dir_port(options, 0),
- router_get_advertised_or_port(options),
- NULL,
- digest,
- v3_digest,
- type, 0.0);
- if (!ds) {
- log_err(LD_GENERAL,"We want to be a directory authority, but we "
- "couldn't add ourselves to the authority list. Failing.");
- return -1;
- }
- dir_server_add(ds);
- }
- if (ds->type != type) {
- log_warn(LD_DIR, "Configured authority type does not match authority "
- "type in DirAuthority list. Adjusting. (%d v %d)",
- type, ds->type);
- ds->type = type;
- }
- if (v3_digest_set && (ds->type & V3_DIRINFO) &&
- tor_memneq(v3_digest, ds->v3_identity_digest, DIGEST_LEN)) {
- log_warn(LD_DIR, "V3 identity key does not match identity declared in "
- "DirAuthority line. Adjusting.");
- memcpy(ds->v3_identity_digest, v3_digest, DIGEST_LEN);
- }
- if (cert) {
- log_info(LD_DIR, "adding my own v3 cert");
- if (trusted_dirs_load_certs_from_string(
- cert->cache_info.signed_descriptor_body,
- TRUSTED_DIRS_CERTS_SRC_SELF, 0,
- NULL)<0) {
- log_warn(LD_DIR, "Unable to parse my own v3 cert! Failing.");
- return -1;
- }
- }
- return 0;
- }
- static int can_reach_or_port = 0;
- static int can_reach_dir_port = 0;
- void
- router_reset_reachability(void)
- {
- can_reach_or_port = can_reach_dir_port = 0;
- }
- static int
- router_reachability_checks_disabled(const or_options_t *options)
- {
- return options->AssumeReachable ||
- net_is_disabled();
- }
- int
- check_whether_orport_reachable(const or_options_t *options)
- {
- int reach_checks_disabled = router_reachability_checks_disabled(options);
- return reach_checks_disabled ||
- can_reach_or_port;
- }
- int
- check_whether_dirport_reachable(const or_options_t *options)
- {
- int reach_checks_disabled = router_reachability_checks_disabled(options) ||
- !options->DirPort_set;
- return reach_checks_disabled ||
- can_reach_dir_port;
- }
- #define MIN_BW_TO_ADVERTISE_DIRSERVER 51200
- static int
- router_has_bandwidth_to_be_dirserver(const or_options_t *options)
- {
- if (options->BandwidthRate < MIN_BW_TO_ADVERTISE_DIRSERVER) {
- return 0;
- }
- if (options->RelayBandwidthRate > 0 &&
- options->RelayBandwidthRate < MIN_BW_TO_ADVERTISE_DIRSERVER) {
- return 0;
- }
- return 1;
- }
- static int
- router_should_be_dirserver(const or_options_t *options, int dir_port)
- {
- static int advertising=1;
- int new_choice=1;
- const char *reason = NULL;
- if (accounting_is_enabled(options) &&
- get_options()->AccountingRule != ACCT_IN) {
-
- int interval_length = accounting_get_interval_length();
- uint32_t effective_bw = get_effective_bwrate(options);
- uint64_t acc_bytes;
- if (!interval_length) {
- log_warn(LD_BUG, "An accounting interval is not allowed to be zero "
- "seconds long. Raising to 1.");
- interval_length = 1;
- }
- log_info(LD_GENERAL, "Calculating whether to advertise %s: effective "
- "bwrate: %u, AccountingMax: "U64_FORMAT", "
- "accounting interval length %d",
- dir_port ? "dirport" : "begindir",
- effective_bw, U64_PRINTF_ARG(options->AccountingMax),
- interval_length);
- acc_bytes = options->AccountingMax;
- if (get_options()->AccountingRule == ACCT_SUM)
- acc_bytes /= 2;
- if (effective_bw >=
- acc_bytes / interval_length) {
- new_choice = 0;
- reason = "AccountingMax enabled";
- }
- } else if (! router_has_bandwidth_to_be_dirserver(options)) {
-
- new_choice = 0;
- reason = "BandwidthRate under 50KB";
- }
- if (advertising != new_choice) {
- if (new_choice == 1) {
- if (dir_port > 0)
- log_notice(LD_DIR, "Advertising DirPort as %d", dir_port);
- else
- log_notice(LD_DIR, "Advertising directory service support");
- } else {
- tor_assert(reason);
- log_notice(LD_DIR, "Not advertising Dir%s (Reason: %s)",
- dir_port ? "Port" : "ectory Service support", reason);
- }
- advertising = new_choice;
- }
- return advertising;
- }
- int
- dir_server_mode(const or_options_t *options)
- {
- if (!options->DirCache)
- return 0;
- return options->DirPort_set ||
- (server_mode(options) && router_has_bandwidth_to_be_dirserver(options));
- }
- static int
- decide_to_advertise_dir_impl(const or_options_t *options,
- uint16_t dir_port,
- int supports_tunnelled_dir_requests)
- {
-
-
- if (!dir_port && !supports_tunnelled_dir_requests)
- return 0;
- if (authdir_mode(options))
- return 1;
- if (net_is_disabled())
- return 0;
- if (dir_port && !router_get_advertised_dir_port(options, dir_port))
- return 0;
- if (supports_tunnelled_dir_requests &&
- !router_get_advertised_or_port(options))
- return 0;
-
- return router_should_be_dirserver(options, dir_port);
- }
- static int
- router_should_advertise_dirport(const or_options_t *options, uint16_t dir_port)
- {
-
- return decide_to_advertise_dir_impl(options, dir_port, 0) ? dir_port : 0;
- }
- static int
- router_should_advertise_begindir(const or_options_t *options,
- int supports_tunnelled_dir_requests)
- {
-
- return decide_to_advertise_dir_impl(options, 0,
- supports_tunnelled_dir_requests);
- }
- static extend_info_t *
- extend_info_from_router(const routerinfo_t *r)
- {
- tor_addr_port_t ap;
- tor_assert(r);
-
- tor_assert_nonfatal(router_skip_or_reachability(get_options(), 0));
- const ed25519_public_key_t *ed_id_key;
- if (r->cache_info.signing_key_cert)
- ed_id_key = &r->cache_info.signing_key_cert->signing_key;
- else
- ed_id_key = NULL;
- router_get_prim_orport(r, &ap);
- return extend_info_new(r->nickname, r->cache_info.identity_digest,
- ed_id_key,
- r->onion_pkey, r->onion_curve25519_pkey,
- &ap.addr, ap.port);
- }
- static int
- router_should_check_reachability(int test_or, int test_dir)
- {
- const routerinfo_t *me = router_get_my_routerinfo();
- const or_options_t *options = get_options();
- if (!me)
- return 0;
- if (routerset_contains_router(options->ExcludeNodes, me, -1) &&
- options->StrictNodes) {
-
- if (test_or || test_dir) {
- #define SELF_EXCLUDED_WARN_INTERVAL 3600
- static ratelim_t warning_limit=RATELIM_INIT(SELF_EXCLUDED_WARN_INTERVAL);
- log_fn_ratelim(&warning_limit, LOG_WARN, LD_CIRC,
- "Can't peform self-tests for this relay: we have "
- "listed ourself in ExcludeNodes, and StrictNodes is set. "
- "We cannot learn whether we are usable, and will not "
- "be able to advertise ourself.");
- }
- return 0;
- }
- return 1;
- }
- void
- router_do_reachability_checks(int test_or, int test_dir)
- {
- const routerinfo_t *me = router_get_my_routerinfo();
- const or_options_t *options = get_options();
- int orport_reachable = check_whether_orport_reachable(options);
- tor_addr_t addr;
- if (router_should_check_reachability(test_or, test_dir)) {
- if (test_or && (!orport_reachable || !circuit_enough_testing_circs())) {
- extend_info_t *ei = extend_info_from_router(me);
-
- log_info(LD_CIRC, "Testing %s of my ORPort: %s:%d.",
- !orport_reachable ? "reachability" : "bandwidth",
- fmt_addr32(me->addr), me->or_port);
- circuit_launch_by_extend_info(CIRCUIT_PURPOSE_TESTING, ei,
- CIRCLAUNCH_NEED_CAPACITY|CIRCLAUNCH_IS_INTERNAL);
- extend_info_free(ei);
- }
-
- tor_addr_from_ipv4h(&addr, me->addr);
- if (test_dir && !check_whether_dirport_reachable(options) &&
- !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;
-
- 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);
-
- directory_request_set_indirection(req, DIRIND_ANON_DIRPORT);
- directory_request_set_resource(req, "authority.z");
- directory_initiate_request(req);
- directory_request_free(req);
- }
- }
- }
- void
- router_orport_found_reachable(void)
- {
- const routerinfo_t *me = router_get_my_routerinfo();
- const or_options_t *options = get_options();
- if (!can_reach_or_port && me) {
- char *address = tor_dup_ip(me->addr);
- log_notice(LD_OR,"Self-testing indicates your ORPort is reachable from "
- "the outside. Excellent.%s",
- options->PublishServerDescriptor_ != NO_DIRINFO
- && check_whether_dirport_reachable(options) ?
- " Publishing server descriptor." : "");
- can_reach_or_port = 1;
- mark_my_descriptor_dirty("ORPort found reachable");
-
- if (options->TestingTorNetwork == 1) {
- reschedule_descriptor_update_check();
- }
- control_event_server_status(LOG_NOTICE,
- "REACHABILITY_SUCCEEDED ORADDRESS=%s:%d",
- address, me->or_port);
- tor_free(address);
- }
- }
- void
- router_dirport_found_reachable(void)
- {
- const routerinfo_t *me = router_get_my_routerinfo();
- const or_options_t *options = get_options();
- if (!can_reach_dir_port && me) {
- char *address = tor_dup_ip(me->addr);
- log_notice(LD_DIRSERV,"Self-testing indicates your DirPort is reachable "
- "from the outside. Excellent.%s",
- options->PublishServerDescriptor_ != NO_DIRINFO
- && check_whether_orport_reachable(options) ?
- " Publishing server descriptor." : "");
- can_reach_dir_port = 1;
- if (router_should_advertise_dirport(options, me->dir_port)) {
- mark_my_descriptor_dirty("DirPort found reachable");
-
- if (options->TestingTorNetwork == 1) {
- reschedule_descriptor_update_check();
- }
- }
- control_event_server_status(LOG_NOTICE,
- "REACHABILITY_SUCCEEDED DIRADDRESS=%s:%d",
- address, me->dir_port);
- tor_free(address);
- }
- }
- void
- router_perform_bandwidth_test(int num_circs, time_t now)
- {
- int num_cells = (int)(get_options()->BandwidthRate * 10 /
- CELL_MAX_NETWORK_SIZE);
- int max_cells = num_cells < CIRCWINDOW_START ?
- num_cells : CIRCWINDOW_START;
- int cells_per_circuit = max_cells / num_circs;
- origin_circuit_t *circ = NULL;
- log_notice(LD_OR,"Performing bandwidth self-test...done.");
- while ((circ = circuit_get_next_by_pk_and_purpose(circ, NULL,
- CIRCUIT_PURPOSE_TESTING))) {
-
- int i = cells_per_circuit;
- if (circ->base_.state != CIRCUIT_STATE_OPEN)
- continue;
- circ->base_.timestamp_dirty = now;
- while (i-- > 0) {
- if (relay_send_command_from_edge(0, TO_CIRCUIT(circ),
- RELAY_COMMAND_DROP,
- NULL, 0, circ->cpath->prev)<0) {
- return;
- }
- }
- }
- }
- int
- net_is_disabled(void)
- {
- return get_options()->DisableNetwork || we_are_hibernating();
- }
- int
- authdir_mode(const or_options_t *options)
- {
- return options->AuthoritativeDir != 0;
- }
- int
- authdir_mode_handles_descs(const or_options_t *options, int purpose)
- {
- if (BUG(purpose < 0))
- return authdir_mode(options);
- else if (purpose == ROUTER_PURPOSE_GENERAL)
- return authdir_mode_v3(options);
- else if (purpose == ROUTER_PURPOSE_BRIDGE)
- return authdir_mode_bridge(options);
- else
- return 0;
- }
- int
- authdir_mode_publishes_statuses(const or_options_t *options)
- {
- if (authdir_mode_bridge(options))
- return 0;
- return authdir_mode(options);
- }
- int
- authdir_mode_tests_reachability(const or_options_t *options)
- {
- return authdir_mode(options);
- }
- int
- authdir_mode_bridge(const or_options_t *options)
- {
- return authdir_mode(options) && options->BridgeAuthoritativeDir != 0;
- }
- MOCK_IMPL(int,
- server_mode,(const or_options_t *options))
- {
- if (options->ClientOnly) return 0;
- return (options->ORPort_set);
- }
- MOCK_IMPL(int,
- public_server_mode,(const or_options_t *options))
- {
- if (!server_mode(options)) return 0;
- return (!options->BridgeRelay);
- }
- int
- should_refuse_unknown_exits(const or_options_t *options)
- {
- if (options->RefuseUnknownExits != -1) {
- return options->RefuseUnknownExits;
- } else {
- return networkstatus_get_param(NULL, "refuseunknownexits", 1, 0, 1);
- }
- }
- static int server_is_advertised=0;
- MOCK_IMPL(int,
- advertised_server_mode,(void))
- {
- return server_is_advertised;
- }
- static void
- set_server_advertised(int s)
- {
- server_is_advertised = s;
- }
- int
- proxy_mode(const or_options_t *options)
- {
- (void)options;
- SMARTLIST_FOREACH_BEGIN(get_configured_ports(), const port_cfg_t *, p) {
- if (p->type == CONN_TYPE_AP_LISTENER ||
- p->type == CONN_TYPE_AP_TRANS_LISTENER ||
- p->type == CONN_TYPE_AP_DNS_LISTENER ||
- p->type == CONN_TYPE_AP_NATD_LISTENER)
- return 1;
- } SMARTLIST_FOREACH_END(p);
- return 0;
- }
- static int
- decide_if_publishable_server(void)
- {
- const or_options_t *options = get_options();
- if (options->ClientOnly)
- return 0;
- if (options->PublishServerDescriptor_ == NO_DIRINFO)
- return 0;
- if (!server_mode(options))
- return 0;
- if (authdir_mode(options))
- return 1;
- if (!router_get_advertised_or_port(options))
- return 0;
- if (!check_whether_orport_reachable(options))
- return 0;
- if (router_have_consensus_path() == CONSENSUS_PATH_INTERNAL) {
-
- return 1;
- } else {
- return check_whether_dirport_reachable(options);
- }
- }
- void
- consider_publishable_server(int force)
- {
- int rebuilt;
- if (!server_mode(get_options()))
- return;
- rebuilt = router_rebuild_descriptor(0);
- if (decide_if_publishable_server()) {
- set_server_advertised(1);
- if (rebuilt == 0)
- router_upload_dir_desc_to_dirservers(force);
- } else {
- set_server_advertised(0);
- }
- }
- uint16_t
- router_get_active_listener_port_by_type_af(int listener_type,
- sa_family_t family)
- {
-
- smartlist_t *conns = get_connection_array();
- SMARTLIST_FOREACH_BEGIN(conns, connection_t *, conn) {
- if (conn->type == listener_type && !conn->marked_for_close &&
- conn->socket_family == family) {
- return conn->port;
- }
- } SMARTLIST_FOREACH_END(conn);
- return 0;
- }
- uint16_t
- router_get_advertised_or_port(const or_options_t *options)
- {
- return router_get_advertised_or_port_by_af(options, AF_INET);
- }
- uint16_t
- router_get_advertised_or_port_by_af(const or_options_t *options,
- sa_family_t family)
- {
- int port = get_first_advertised_port_by_type_af(CONN_TYPE_OR_LISTENER,
- family);
- (void)options;
-
- if (port == CFG_AUTO_PORT)
- return router_get_active_listener_port_by_type_af(CONN_TYPE_OR_LISTENER,
- family);
- return port;
- }
- uint16_t
- router_get_advertised_dir_port(const or_options_t *options, uint16_t dirport)
- {
- int dirport_configured = get_primary_dir_port();
- (void)options;
- if (!dirport_configured)
- return dirport;
- if (dirport_configured == CFG_AUTO_PORT)
- return router_get_active_listener_port_by_type_af(CONN_TYPE_DIR_LISTENER,
- AF_INET);
- return dirport_configured;
- }
- static routerinfo_t *desc_routerinfo = NULL;
- static extrainfo_t *desc_extrainfo = NULL;
- static const char *desc_gen_reason = NULL;
- static time_t desc_clean_since = 0;
- static const char *desc_dirty_reason = "Tor just started";
- static int desc_needs_upload = 0;
- void
- router_upload_dir_desc_to_dirservers(int force)
- {
- const routerinfo_t *ri;
- extrainfo_t *ei;
- char *msg;
- size_t desc_len, extra_len = 0, total_len;
- dirinfo_type_t auth = get_options()->PublishServerDescriptor_;
- ri = router_get_my_routerinfo();
- if (!ri) {
- log_info(LD_GENERAL, "No descriptor; skipping upload");
- return;
- }
- ei = router_get_my_extrainfo();
- if (auth == NO_DIRINFO)
- return;
- if (!force && !desc_needs_upload)
- return;
- log_info(LD_OR, "Uploading relay descriptor to directory authorities%s",
- force ? " (forced)" : "");
- desc_needs_upload = 0;
- desc_len = ri->cache_info.signed_descriptor_len;
- extra_len = ei ? ei->cache_info.signed_descriptor_len : 0;
- total_len = desc_len + extra_len + 1;
- msg = tor_malloc(total_len);
- memcpy(msg, ri->cache_info.signed_descriptor_body, desc_len);
- if (ei) {
- memcpy(msg+desc_len, ei->cache_info.signed_descriptor_body, extra_len);
- }
- msg[desc_len+extra_len] = 0;
- directory_post_to_dirservers(DIR_PURPOSE_UPLOAD_DIR,
- (auth & BRIDGE_DIRINFO) ?
- ROUTER_PURPOSE_BRIDGE :
- ROUTER_PURPOSE_GENERAL,
- auth, msg, desc_len, extra_len);
- tor_free(msg);
- }
- int
- router_compare_to_my_exit_policy(const tor_addr_t *addr, uint16_t port)
- {
- const routerinfo_t *me = router_get_my_routerinfo();
- if (!me)
- return -1;
-
- if (tor_addr_is_null(addr))
- return -1;
-
- if ((tor_addr_family(addr) == AF_INET ||
- tor_addr_family(addr) == AF_INET6)) {
- return compare_tor_addr_to_addr_policy(addr, port,
- me->exit_policy) != ADDR_POLICY_ACCEPTED;
- #if 0
- } else if (tor_addr_family(addr) == AF_INET6) {
- return get_options()->IPv6Exit &&
- desc_routerinfo->ipv6_exit_policy &&
- compare_tor_addr_to_short_policy(addr, port,
- me->ipv6_exit_policy) != ADDR_POLICY_ACCEPTED;
- #endif
- } else {
- return -1;
- }
- }
- MOCK_IMPL(int,
- router_my_exit_policy_is_reject_star,(void))
- {
- if (!router_get_my_routerinfo())
- return -1;
- return router_get_my_routerinfo()->policy_is_reject_star;
- }
- int
- router_digest_is_me(const char *digest)
- {
- return (server_identitykey &&
- tor_memeq(server_identitykey_digest, digest, DIGEST_LEN));
- }
- const uint8_t *
- router_get_my_id_digest(void)
- {
- return (const uint8_t *)server_identitykey_digest;
- }
- int
- router_extrainfo_digest_is_me(const char *digest)
- {
- extrainfo_t *ei = router_get_my_extrainfo();
- if (!ei)
- return 0;
- return tor_memeq(digest,
- ei->cache_info.signed_descriptor_digest,
- DIGEST_LEN);
- }
- int
- router_is_me(const routerinfo_t *router)
- {
- return router_digest_is_me(router->cache_info.identity_digest);
- }
- MOCK_IMPL(const routerinfo_t *,
- router_get_my_routerinfo,(void))
- {
- if (!server_mode(get_options()))
- return NULL;
- if (router_rebuild_descriptor(0))
- return NULL;
- return desc_routerinfo;
- }
- const char *
- router_get_my_descriptor(void)
- {
- const char *body;
- const routerinfo_t *me = router_get_my_routerinfo();
- if (! me)
- return NULL;
- tor_assert(me->cache_info.saved_location == SAVED_NOWHERE);
- body = signed_descriptor_get_body(&me->cache_info);
-
- tor_assert(!body[me->cache_info.signed_descriptor_len]);
- log_debug(LD_GENERAL,"my desc is '%s'", body);
- return body;
- }
- extrainfo_t *
- router_get_my_extrainfo(void)
- {
- if (!server_mode(get_options()))
- return NULL;
- if (router_rebuild_descriptor(0))
- return NULL;
- return desc_extrainfo;
- }
- const char *
- router_get_descriptor_gen_reason(void)
- {
- return desc_gen_reason;
- }
- static smartlist_t *warned_nonexistent_family = NULL;
- static int router_guess_address_from_dir_headers(uint32_t *guess);
- MOCK_IMPL(int,
- router_pick_published_address,(const or_options_t *options, uint32_t *addr,
- int cache_only))
- {
-
- *addr = get_last_resolved_addr();
- if (*addr)
- return 0;
-
- if (!cache_only) {
- if (resolve_my_address(LOG_INFO, options, addr, NULL, NULL) >= 0) {
- log_info(LD_CONFIG,"Success: chose address '%s'.", fmt_addr32(*addr));
- return 0;
- }
- }
-
- if (router_guess_address_from_dir_headers(addr) >= 0)
- return 0;
-
- return -1;
- }
- static void
- router_check_descriptor_address_port_consistency(uint32_t ipv4h_desc_addr,
- int listener_type)
- {
- tor_assert(listener_type == CONN_TYPE_OR_LISTENER ||
- listener_type == CONN_TYPE_DIR_LISTENER);
-
- int port_v4_cfg = get_first_advertised_port_by_type_af(listener_type,
- AF_INET);
- if (port_v4_cfg != 0 &&
- !port_exists_by_type_addr32h_port(listener_type,
- ipv4h_desc_addr, port_v4_cfg, 1)) {
- const tor_addr_t *port_addr = get_first_advertised_addr_by_type_af(
- listener_type,
- AF_INET);
-
- tor_assert(port_addr);
- tor_addr_t desc_addr;
- char port_addr_str[TOR_ADDR_BUF_LEN];
- char desc_addr_str[TOR_ADDR_BUF_LEN];
- tor_addr_to_str(port_addr_str, port_addr, TOR_ADDR_BUF_LEN, 0);
- tor_addr_from_ipv4h(&desc_addr, ipv4h_desc_addr);
- tor_addr_to_str(desc_addr_str, &desc_addr, TOR_ADDR_BUF_LEN, 0);
- const char *listener_str = (listener_type == CONN_TYPE_OR_LISTENER ?
- "OR" : "Dir");
- log_warn(LD_CONFIG, "The IPv4 %sPort address %s does not match the "
- "descriptor address %s. If you have a static public IPv4 "
- "address, use 'Address <IPv4>' and 'OutboundBindAddress "
- "<IPv4>'. If you are behind a NAT, use two %sPort lines: "
- "'%sPort <PublicPort> NoListen' and '%sPort <InternalPort> "
- "NoAdvertise'.",
- listener_str, port_addr_str, desc_addr_str, listener_str,
- listener_str, listener_str);
- }
- }
- static void
- router_check_descriptor_address_consistency(uint32_t ipv4h_desc_addr)
- {
- router_check_descriptor_address_port_consistency(ipv4h_desc_addr,
- CONN_TYPE_OR_LISTENER);
- router_check_descriptor_address_port_consistency(ipv4h_desc_addr,
- CONN_TYPE_DIR_LISTENER);
- }
- int
- router_build_fresh_descriptor(routerinfo_t **r, extrainfo_t **e)
- {
- routerinfo_t *ri;
- extrainfo_t *ei;
- uint32_t addr;
- char platform[256];
- int hibernating = we_are_hibernating();
- const or_options_t *options = get_options();
- if (router_pick_published_address(options, &addr, 0) < 0) {
- log_warn(LD_CONFIG, "Don't know my address while generating descriptor");
- return -1;
- }
-
- router_check_descriptor_address_consistency(addr);
- ri = tor_malloc_zero(sizeof(routerinfo_t));
- ri->cache_info.routerlist_index = -1;
- ri->nickname = tor_strdup(options->Nickname);
- ri->addr = addr;
- ri->or_port = router_get_advertised_or_port(options);
- ri->dir_port = router_get_advertised_dir_port(options, 0);
- ri->supports_tunnelled_dir_requests =
- directory_permits_begindir_requests(options);
- ri->cache_info.published_on = time(NULL);
- ri->onion_pkey = crypto_pk_dup_key(get_onion_key());
- ri->onion_curve25519_pkey =
- tor_memdup(&get_current_curve25519_keypair()->pubkey,
- sizeof(curve25519_public_key_t));
-
- {
- const port_cfg_t *ipv6_orport = NULL;
- SMARTLIST_FOREACH_BEGIN(get_configured_ports(), const port_cfg_t *, p) {
- if (p->type == CONN_TYPE_OR_LISTENER &&
- ! p->server_cfg.no_advertise &&
- ! p->server_cfg.bind_ipv4_only &&
- tor_addr_family(&p->addr) == AF_INET6) {
-
- const int default_auth = using_default_dir_authorities(options);
- if (! tor_addr_is_internal(&p->addr, 0) || ! default_auth) {
- ipv6_orport = p;
- break;
- } else {
- char addrbuf[TOR_ADDR_BUF_LEN];
- log_warn(LD_CONFIG,
- "Unable to use configured IPv6 address \"%s\" in a "
- "descriptor. Skipping it. "
- "Try specifying a globally reachable address explicitly.",
- tor_addr_to_str(addrbuf, &p->addr, sizeof(addrbuf), 1));
- }
- }
- } SMARTLIST_FOREACH_END(p);
- if (ipv6_orport) {
- tor_addr_copy(&ri->ipv6_addr, &ipv6_orport->addr);
- ri->ipv6_orport = ipv6_orport->port;
- }
- }
- ri->identity_pkey = crypto_pk_dup_key(get_server_identity_key());
- if (crypto_pk_get_digest(ri->identity_pkey,
- ri->cache_info.identity_digest)<0) {
- routerinfo_free(ri);
- return -1;
- }
- ri->cache_info.signing_key_cert =
- tor_cert_dup(get_master_signing_key_cert());
- get_platform_str(platform, sizeof(platform));
- ri->platform = tor_strdup(platform);
- ri->protocol_list = tor_strdup(protover_get_supported_protocols());
-
- ri->bandwidthrate = get_effective_bwrate(options);
-
- ri->bandwidthburst = get_effective_bwburst(options);
- ri->bandwidthcapacity = hibernating ? 0 : rep_hist_bandwidth_assess();
- if (dns_seems_to_be_broken() || has_dns_init_failed()) {
-
- policies_exit_policy_append_reject_star(&ri->exit_policy);
- } else {
- policies_parse_exit_policy_from_options(options,ri->addr,&ri->ipv6_addr,
- &ri->exit_policy);
- }
- ri->policy_is_reject_star =
- policy_is_reject_star(ri->exit_policy, AF_INET, 1) &&
- policy_is_reject_star(ri->exit_policy, AF_INET6, 1);
- if (options->IPv6Exit) {
- char *p_tmp = policy_summarize(ri->exit_policy, AF_INET6);
- if (p_tmp)
- ri->ipv6_exit_policy = parse_short_policy(p_tmp);
- tor_free(p_tmp);
- }
- if (options->MyFamily && ! options->BridgeRelay) {
- if (!warned_nonexistent_family)
- warned_nonexistent_family = smartlist_new();
- ri->declared_family = smartlist_new();
- 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))
- continue;
- else
- 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) &&
- !is_legal_hexdigest(name)) {
- if (is_legal)
- log_warn(LD_CONFIG,
- "I have no descriptor for the router named \"%s\" in my "
- "declared family; I'll use the nickname as is, but "
- "this may confuse clients.", name);
- else
- log_warn(LD_CONFIG, "There is a router named \"%s\" in my "
- "declared family, but that isn't a legal nickname. "
- "Skipping it.", escaped(name));
- smartlist_add_strdup(warned_nonexistent_family, name);
- }
- if (is_legal) {
- smartlist_add_strdup(ri->declared_family, name);
- }
- } else if (router_digest_is_me(member->identity)) {
-
-
- } else {
- char *fp = tor_malloc(HEX_DIGEST_LEN+2);
- fp[0] = '$';
- base16_encode(fp+1,HEX_DIGEST_LEN+1,
- member->identity, DIGEST_LEN);
- smartlist_add(ri->declared_family, fp);
- if (smartlist_contains_string(warned_nonexistent_family, name))
- smartlist_string_remove(warned_nonexistent_family, name);
- }
- }
-
- smartlist_sort_strings(ri->declared_family);
- smartlist_uniq_strings(ri->declared_family);
- }
-
- ei = tor_malloc_zero(sizeof(extrainfo_t));
- ei->cache_info.is_extrainfo = 1;
- strlcpy(ei->nickname, get_options()->Nickname, sizeof(ei->nickname));
- ei->cache_info.published_on = ri->cache_info.published_on;
- ei->cache_info.signing_key_cert =
- tor_cert_dup(get_master_signing_key_cert());
- memcpy(ei->cache_info.identity_digest, ri->cache_info.identity_digest,
- DIGEST_LEN);
- if (extrainfo_dump_to_string(&ei->cache_info.signed_descriptor_body,
- ei, get_server_identity_key(),
- get_master_signing_keypair()) < 0) {
- log_warn(LD_BUG, "Couldn't generate extra-info descriptor.");
- extrainfo_free(ei);
- ei = NULL;
- } else {
- ei->cache_info.signed_descriptor_len =
- strlen(ei->cache_info.signed_descriptor_body);
- router_get_extrainfo_hash(ei->cache_info.signed_descriptor_body,
- ei->cache_info.signed_descriptor_len,
- ei->cache_info.signed_descriptor_digest);
- crypto_digest256((char*) ei->digest256,
- ei->cache_info.signed_descriptor_body,
- ei->cache_info.signed_descriptor_len,
- DIGEST_SHA256);
- }
-
- if (ei) {
- memcpy(ri->cache_info.extra_info_digest,
- ei->cache_info.signed_descriptor_digest,
- DIGEST_LEN);
- memcpy(ri->cache_info.extra_info_digest256,
- ei->digest256,
- DIGEST256_LEN);
- } else {
-
- }
- if (! (ri->cache_info.signed_descriptor_body =
- router_dump_router_to_string(ri, get_server_identity_key(),
- get_onion_key(),
- get_current_curve25519_keypair(),
- get_master_signing_keypair())) ) {
- log_warn(LD_BUG, "Couldn't generate router descriptor.");
- routerinfo_free(ri);
- extrainfo_free(ei);
- return -1;
- }
- ri->cache_info.signed_descriptor_len =
- strlen(ri->cache_info.signed_descriptor_body);
- ri->purpose =
- options->BridgeRelay ? ROUTER_PURPOSE_BRIDGE : ROUTER_PURPOSE_GENERAL;
- if (options->BridgeRelay) {
-
- ri->cache_info.send_unencrypted = 0;
- if (ei)
- ei->cache_info.send_unencrypted = 0;
- } else {
- ri->cache_info.send_unencrypted = 1;
- if (ei)
- ei->cache_info.send_unencrypted = 1;
- }
- router_get_router_hash(ri->cache_info.signed_descriptor_body,
- strlen(ri->cache_info.signed_descriptor_body),
- ri->cache_info.signed_descriptor_digest);
- if (ei) {
- tor_assert(!
- routerinfo_incompatible_with_extrainfo(ri->identity_pkey, ei,
- &ri->cache_info, NULL));
- }
- *r = ri;
- *e = ei;
- return 0;
- }
- int
- router_rebuild_descriptor(int force)
- {
- routerinfo_t *ri;
- extrainfo_t *ei;
- uint32_t addr;
- const or_options_t *options = get_options();
- if (desc_clean_since && !force)
- return 0;
- if (router_pick_published_address(options, &addr, 0) < 0 ||
- router_get_advertised_or_port(options) == 0) {
-
- desc_clean_since = time(NULL);
- return -1;
- }
- log_info(LD_OR, "Rebuilding relay descriptor%s", force ? " (forced)" : "");
- if (router_build_fresh_descriptor(&ri, &ei) < 0) {
- return -1;
- }
- routerinfo_free(desc_routerinfo);
- desc_routerinfo = ri;
- extrainfo_free(desc_extrainfo);
- desc_extrainfo = ei;
- desc_clean_since = time(NULL);
- desc_needs_upload = 1;
- desc_gen_reason = desc_dirty_reason;
- desc_dirty_reason = NULL;
- control_event_my_descriptor_changed();
- return 0;
- }
- #define FORCE_REGENERATE_DESCRIPTOR_INTERVAL (18*60*60)
- #define FAST_RETRY_DESCRIPTOR_INTERVAL (90*60)
- void
- mark_my_descriptor_dirty_if_too_old(time_t now)
- {
- networkstatus_t *ns;
- const routerstatus_t *rs;
- const char *retry_fast_reason = NULL;
- const time_t slow_cutoff = now - FORCE_REGENERATE_DESCRIPTOR_INTERVAL;
- const time_t fast_cutoff = now - FAST_RETRY_DESCRIPTOR_INTERVAL;
-
- if (! desc_clean_since)
- return;
-
- if (desc_clean_since < slow_cutoff) {
- mark_my_descriptor_dirty("time for new descriptor");
- return;
- }
-
- ns = networkstatus_get_live_consensus(now);
- if (ns) {
- rs = networkstatus_vote_find_entry(ns, server_identitykey_digest);
- if (rs == NULL)
- retry_fast_reason = "not listed in consensus";
- else if (rs->published_on < slow_cutoff)
- retry_fast_reason = "version listed in consensus is quite old";
- }
- if (retry_fast_reason && desc_clean_since < fast_cutoff)
- mark_my_descriptor_dirty(retry_fast_reason);
- }
- void
- mark_my_descriptor_dirty(const char *reason)
- {
- const or_options_t *options = get_options();
- if (server_mode(options) && options->PublishServerDescriptor_)
- log_info(LD_OR, "Decided to publish new relay descriptor: %s", reason);
- desc_clean_since = 0;
- if (!desc_dirty_reason)
- desc_dirty_reason = reason;
- }
- #define MAX_BANDWIDTH_CHANGE_FREQ (3*60*60)
- void
- check_descriptor_bandwidth_changed(time_t now)
- {
- static time_t last_changed = 0;
- uint64_t prev, cur;
- if (!router_get_my_routerinfo())
- return;
- prev = router_get_my_routerinfo()->bandwidthcapacity;
- cur = we_are_hibernating() ? 0 : rep_hist_bandwidth_assess();
- if ((prev != cur && (!prev || !cur)) ||
- cur > prev*2 ||
- cur < prev/2) {
- if (last_changed+MAX_BANDWIDTH_CHANGE_FREQ < now || !prev) {
- log_info(LD_GENERAL,
- "Measured bandwidth has changed; rebuilding descriptor.");
- mark_my_descriptor_dirty("bandwidth has changed");
- last_changed = now;
- }
- }
- }
- static void
- log_addr_has_changed(int severity,
- const tor_addr_t *prev,
- const tor_addr_t *cur,
- const char *source)
- {
- char addrbuf_prev[TOR_ADDR_BUF_LEN];
- char addrbuf_cur[TOR_ADDR_BUF_LEN];
- if (tor_addr_to_str(addrbuf_prev, prev, sizeof(addrbuf_prev), 1) == NULL)
- strlcpy(addrbuf_prev, "???", TOR_ADDR_BUF_LEN);
- if (tor_addr_to_str(addrbuf_cur, cur, sizeof(addrbuf_cur), 1) == NULL)
- strlcpy(addrbuf_cur, "???", TOR_ADDR_BUF_LEN);
- if (!tor_addr_is_null(prev))
- log_fn(severity, LD_GENERAL,
- "Our IP Address has changed from %s to %s; "
- "rebuilding descriptor (source: %s).",
- addrbuf_prev, addrbuf_cur, source);
- else
- log_notice(LD_GENERAL,
- "Guessed our IP address as %s (source: %s).",
- addrbuf_cur, source);
- }
- void
- check_descriptor_ipaddress_changed(time_t now)
- {
- uint32_t prev, cur;
- const or_options_t *options = get_options();
- const char *method = NULL;
- char *hostname = NULL;
- (void) now;
- if (router_get_my_routerinfo() == NULL)
- return;
-
- prev = router_get_my_routerinfo()->addr;
- if (resolve_my_address(LOG_INFO, options, &cur, &method, &hostname) < 0) {
- log_info(LD_CONFIG,"options->Address didn't resolve into an IP.");
- return;
- }
- if (prev != cur) {
- char *source;
- tor_addr_t tmp_prev, tmp_cur;
- tor_addr_from_ipv4h(&tmp_prev, prev);
- tor_addr_from_ipv4h(&tmp_cur, cur);
- tor_asprintf(&source, "METHOD=%s%s%s", method,
- hostname ? " HOSTNAME=" : "",
- hostname ? hostname : "");
- log_addr_has_changed(LOG_NOTICE, &tmp_prev, &tmp_cur, source);
- tor_free(source);
- ip_address_changed(0);
- }
- tor_free(hostname);
- }
- static tor_addr_t last_guessed_ip = TOR_ADDR_NULL;
- void
- router_new_address_suggestion(const char *suggestion,
- const dir_connection_t *d_conn)
- {
- tor_addr_t addr;
- uint32_t cur = 0;
- const or_options_t *options = get_options();
-
- if (tor_addr_parse(&addr, suggestion) == -1) {
- log_debug(LD_DIR, "Malformed X-Your-Address-Is header %s. Ignoring.",
- escaped(suggestion));
- return;
- }
- log_debug(LD_DIR, "Got X-Your-Address-Is: %s.", suggestion);
- if (!server_mode(options)) {
- tor_addr_copy(&last_guessed_ip, &addr);
- return;
- }
-
- cur = get_last_resolved_addr();
- if (cur ||
- resolve_my_address(LOG_INFO, options, &cur, NULL, NULL) >= 0) {
-
- tor_addr_from_ipv4h(&last_guessed_ip, cur);
- return;
- }
- if (tor_addr_is_internal(&addr, 0)) {
-
- return;
- }
- if (tor_addr_eq(&d_conn->base_.addr, &addr)) {
-
- log_debug(LD_DIR, "A directory server told us our IP address is %s, "
- "but they are just reporting their own IP address. Ignoring.",
- suggestion);
- return;
- }
-
- if (!tor_addr_eq(&last_guessed_ip, &addr)) {
- control_event_server_status(LOG_NOTICE,
- "EXTERNAL_ADDRESS ADDRESS=%s METHOD=DIRSERV",
- suggestion);
- log_addr_has_changed(LOG_NOTICE, &last_guessed_ip, &addr,
- d_conn->base_.address);
- ip_address_changed(0);
- tor_addr_copy(&last_guessed_ip, &addr);
- }
- }
- static int
- router_guess_address_from_dir_headers(uint32_t *guess)
- {
- if (!tor_addr_is_null(&last_guessed_ip)) {
- *guess = tor_addr_to_ipv4h(&last_guessed_ip);
- return 0;
- }
- return -1;
- }
- STATIC void
- get_platform_str(char *platform, size_t len)
- {
- tor_snprintf(platform, len, "Tor %s on %s",
- get_short_version(), get_uname());
- }
- #define DEBUG_ROUTER_DUMP_ROUTER_TO_STRING
- char *
- router_dump_router_to_string(routerinfo_t *router,
- const crypto_pk_t *ident_key,
- const crypto_pk_t *tap_key,
- const curve25519_keypair_t *ntor_keypair,
- const ed25519_keypair_t *signing_keypair)
- {
- char *address = NULL;
- char *onion_pkey = NULL;
- char *identity_pkey = NULL;
- char digest[DIGEST256_LEN];
- char published[ISO_TIME_LEN+1];
- char fingerprint[FINGERPRINT_LEN+1];
- char *extra_info_line = NULL;
- size_t onion_pkeylen, identity_pkeylen;
- char *family_line = NULL;
- char *extra_or_address = NULL;
- const or_options_t *options = get_options();
- smartlist_t *chunks = NULL;
- char *output = NULL;
- const int emit_ed_sigs = signing_keypair &&
- router->cache_info.signing_key_cert;
- char *ed_cert_line = NULL;
- char *rsa_tap_cc_line = NULL;
- char *ntor_cc_line = NULL;
- char *proto_line = NULL;
-
- if (!crypto_pk_eq_keys(ident_key, router->identity_pkey)) {
- log_warn(LD_BUG,"Tried to sign a router with a private key that didn't "
- "match router's public key!");
- goto err;
- }
- if (emit_ed_sigs) {
- if (!router->cache_info.signing_key_cert->signing_key_included ||
- !ed25519_pubkey_eq(&router->cache_info.signing_key_cert->signed_key,
- &signing_keypair->pubkey)) {
- log_warn(LD_BUG, "Tried to sign a router descriptor with a mismatched "
- "ed25519 key chain %d",
- router->cache_info.signing_key_cert->signing_key_included);
- goto err;
- }
- }
-
- if (crypto_pk_get_fingerprint(router->identity_pkey, fingerprint, 1)<0) {
- log_err(LD_BUG,"Error computing fingerprint");
- goto err;
- }
- if (emit_ed_sigs) {
-
- char ed_cert_base64[256];
- char ed_fp_base64[ED25519_BASE64_LEN+1];
- if (base64_encode(ed_cert_base64, sizeof(ed_cert_base64),
- (const char*)router->cache_info.signing_key_cert->encoded,
- router->cache_info.signing_key_cert->encoded_len,
- BASE64_ENCODE_MULTILINE) < 0) {
- log_err(LD_BUG,"Couldn't base64-encode signing key certificate!");
- goto err;
- }
- if (ed25519_public_to_base64(ed_fp_base64,
- &router->cache_info.signing_key_cert->signing_key)<0) {
- log_err(LD_BUG,"Couldn't base64-encode identity key\n");
- goto err;
- }
- tor_asprintf(&ed_cert_line, "identity-ed25519\n"
- "-----BEGIN ED25519 CERT-----\n"
- "%s"
- "-----END ED25519 CERT-----\n"
- "master-key-ed25519 %s\n",
- ed_cert_base64, ed_fp_base64);
- }
-
- if (crypto_pk_write_public_key_to_string(router->onion_pkey,
- &onion_pkey,&onion_pkeylen)<0) {
- log_warn(LD_BUG,"write onion_pkey to string failed!");
- goto err;
- }
-
- if (crypto_pk_write_public_key_to_string(router->identity_pkey,
- &identity_pkey,&identity_pkeylen)<0) {
- log_warn(LD_BUG,"write identity_pkey to string failed!");
- goto err;
- }
-
- if (tap_key && router->cache_info.signing_key_cert &&
- router->cache_info.signing_key_cert->signing_key_included) {
- char buf[256];
- int tap_cc_len = 0;
- uint8_t *tap_cc =
- make_tap_onion_key_crosscert(tap_key,
- &router->cache_info.signing_key_cert->signing_key,
- router->identity_pkey,
- &tap_cc_len);
- if (!tap_cc) {
- log_warn(LD_BUG,"make_tap_onion_key_crosscert failed!");
- goto err;
- }
- if (base64_encode(buf, sizeof(buf), (const char*)tap_cc, tap_cc_len,
- BASE64_ENCODE_MULTILINE) < 0) {
- log_warn(LD_BUG,"base64_encode(rsa_crosscert) failed!");
- tor_free(tap_cc);
- goto err;
- }
- tor_free(tap_cc);
- tor_asprintf(&rsa_tap_cc_line,
- "onion-key-crosscert\n"
- "-----BEGIN CROSSCERT-----\n"
- "%s"
- "-----END CROSSCERT-----\n", buf);
- }
-
- if (ntor_keypair && router->cache_info.signing_key_cert &&
- router->cache_info.signing_key_cert->signing_key_included) {
- int sign = 0;
- char buf[256];
-
- tor_cert_t *cert =
- make_ntor_onion_key_crosscert(ntor_keypair,
- &router->cache_info.signing_key_cert->signing_key,
- router->cache_info.published_on,
- get_onion_key_lifetime(), &sign);
- if (!cert) {
- log_warn(LD_BUG,"make_ntor_onion_key_crosscert failed!");
- goto err;
- }
- tor_assert(sign == 0 || sign == 1);
- if (base64_encode(buf, sizeof(buf),
- (const char*)cert->encoded, cert->encoded_len,
- BASE64_ENCODE_MULTILINE)<0) {
- log_warn(LD_BUG,"base64_encode(ntor_crosscert) failed!");
- tor_cert_free(cert);
- goto err;
- }
- tor_cert_free(cert);
- tor_asprintf(&ntor_cc_line,
- "ntor-onion-key-crosscert %d\n"
- "-----BEGIN ED25519 CERT-----\n"
- "%s"
- "-----END ED25519 CERT-----\n", sign, buf);
- }
-
- format_iso_time(published, router->cache_info.published_on);
- if (router->declared_family && smartlist_len(router->declared_family)) {
- char *family = smartlist_join_strings(router->declared_family,
- " ", 0, NULL);
- tor_asprintf(&family_line, "family %s\n", family);
- tor_free(family);
- } else {
- family_line = tor_strdup("");
- }
- if (!tor_digest_is_zero(router->cache_info.extra_info_digest)) {
- char extra_info_digest[HEX_DIGEST_LEN+1];
- base16_encode(extra_info_digest, sizeof(extra_info_digest),
- router->cache_info.extra_info_digest, DIGEST_LEN);
- if (!tor_digest256_is_zero(router->cache_info.extra_info_digest256)) {
- char d256_64[BASE64_DIGEST256_LEN+1];
- digest256_to_base64(d256_64, router->cache_info.extra_info_digest256);
- tor_asprintf(&extra_info_line, "extra-info-digest %s %s\n",
- extra_info_digest, d256_64);
- } else {
- tor_asprintf(&extra_info_line, "extra-info-digest %s\n",
- extra_info_digest);
- }
- }
- if (router->ipv6_orport &&
- tor_addr_family(&router->ipv6_addr) == AF_INET6) {
- char addr[TOR_ADDR_BUF_LEN];
- const char *a;
- a = tor_addr_to_str(addr, &router->ipv6_addr, sizeof(addr), 1);
- if (a) {
- tor_asprintf(&extra_or_address,
- "or-address %s:%d\n", a, router->ipv6_orport);
- log_debug(LD_OR, "My or-address line is <%s>", extra_or_address);
- }
- }
- if (router->protocol_list) {
- tor_asprintf(&proto_line, "proto %s\n", router->protocol_list);
- } else {
- proto_line = tor_strdup("");
- }
- address = tor_dup_ip(router->addr);
- chunks = smartlist_new();
-
- smartlist_add_asprintf(chunks,
- "router %s %s %d 0 %d\n"
- "%s"
- "%s"
- "platform %s\n"
- "%s"
- "published %s\n"
- "fingerprint %s\n"
- "uptime %ld\n"
- "bandwidth %d %d %d\n"
- "%s%s"
- "onion-key\n%s"
- "signing-key\n%s"
- "%s%s"
- "%s%s%s",
- router->nickname,
- address,
- router->or_port,
- router_should_advertise_dirport(options, router->dir_port),
- ed_cert_line ? ed_cert_line : "",
- extra_or_address ? extra_or_address : "",
- router->platform,
- proto_line,
- published,
- fingerprint,
- get_uptime(),
- (int) router->bandwidthrate,
- (int) router->bandwidthburst,
- (int) router->bandwidthcapacity,
- extra_info_line ? extra_info_line : "",
- (options->DownloadExtraInfo || options->V3AuthoritativeDir) ?
- "caches-extra-info\n" : "",
- onion_pkey, identity_pkey,
- rsa_tap_cc_line ? rsa_tap_cc_line : "",
- ntor_cc_line ? ntor_cc_line : "",
- family_line,
- we_are_hibernating() ? "hibernating 1\n" : "",
- "hidden-service-dir\n");
- if (options->ContactInfo && strlen(options->ContactInfo)) {
- const char *ci = options->ContactInfo;
- if (strchr(ci, '\n') || strchr(ci, '\r'))
- ci = escaped(ci);
- 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),
- (const char *)router->onion_curve25519_pkey->public_key,
- CURVE25519_PUBKEY_LEN, BASE64_ENCODE_MULTILINE);
- smartlist_add_asprintf(chunks, "ntor-onion-key %s", kbuf);
- } else {
-
- log_err(LD_BUG, "A relay must have an ntor onion key");
- goto err;
- }
-
- if (!router->exit_policy || !smartlist_len(router->exit_policy)) {
- smartlist_add_strdup(chunks, "reject *:*\n");
- } else if (router->exit_policy) {
- char *exit_policy = router_dump_exit_policy_to_string(router,1,0);
- if (!exit_policy)
- goto err;
- smartlist_add_asprintf(chunks, "%s\n", exit_policy);
- tor_free(exit_policy);
- }
- if (router->ipv6_exit_policy) {
- char *p6 = write_short_policy(router->ipv6_exit_policy);
- if (p6 && strcmp(p6, "reject 1-65535")) {
- smartlist_add_asprintf(chunks,
- "ipv6-policy %s\n", p6);
- }
- tor_free(p6);
- }
- if (router_should_advertise_begindir(options,
- router->supports_tunnelled_dir_requests)) {
- smartlist_add_strdup(chunks, "tunnelled-dir-server\n");
- }
-
- if (emit_ed_sigs) {
- smartlist_add_strdup(chunks, "router-sig-ed25519 ");
- crypto_digest_smartlist_prefix(digest, DIGEST256_LEN,
- ED_DESC_SIGNATURE_PREFIX,
- chunks, "", DIGEST_SHA256);
- ed25519_signature_t sig;
- char buf[ED25519_SIG_BASE64_LEN+1];
- if (ed25519_sign(&sig, (const uint8_t*)digest, DIGEST256_LEN,
- signing_keypair) < 0)
- goto err;
- if (ed25519_signature_to_base64(buf, &sig) < 0)
- goto err;
- smartlist_add_asprintf(chunks, "%s\n", buf);
- }
-
- smartlist_add_strdup(chunks, "router-signature\n");
- crypto_digest_smartlist(digest, DIGEST_LEN, chunks, "", DIGEST_SHA1);
- {
- char *sig;
- if (!(sig = router_get_dirobj_signature(digest, DIGEST_LEN, ident_key))) {
- log_warn(LD_BUG, "Couldn't sign router descriptor");
- goto err;
- }
- smartlist_add(chunks, sig);
- }
-
- smartlist_add_strdup(chunks, "\n");
- output = smartlist_join_strings(chunks, "", 0, NULL);
- #ifdef DEBUG_ROUTER_DUMP_ROUTER_TO_STRING
- {
- char *s_dup;
- const char *cp;
- routerinfo_t *ri_tmp;
- cp = s_dup = tor_strdup(output);
- ri_tmp = router_parse_entry_from_string(cp, NULL, 1, 0, NULL, NULL);
- if (!ri_tmp) {
- log_err(LD_BUG,
- "We just generated a router descriptor we can't parse.");
- log_err(LD_BUG, "Descriptor was: <<%s>>", output);
- goto err;
- }
- tor_free(s_dup);
- routerinfo_free(ri_tmp);
- }
- #endif
- goto done;
- err:
- tor_free(output);
- done:
- if (chunks) {
- SMARTLIST_FOREACH(chunks, char *, cp, tor_free(cp));
- smartlist_free(chunks);
- }
- tor_free(address);
- tor_free(family_line);
- tor_free(onion_pkey);
- tor_free(identity_pkey);
- tor_free(extra_or_address);
- tor_free(ed_cert_line);
- tor_free(rsa_tap_cc_line);
- tor_free(ntor_cc_line);
- tor_free(extra_info_line);
- tor_free(proto_line);
- return output;
- }
- char *
- router_dump_exit_policy_to_string(const routerinfo_t *router,
- int include_ipv4,
- int include_ipv6)
- {
- if ((!router->exit_policy) || (router->policy_is_reject_star)) {
- return tor_strdup("reject *:*");
- }
- return policy_dump_to_string(router->exit_policy,
- include_ipv4,
- include_ipv6);
- }
- void
- router_get_prim_orport(const routerinfo_t *router, tor_addr_port_t *ap_out)
- {
- tor_assert(ap_out != NULL);
- tor_addr_from_ipv4h(&ap_out->addr, router->addr);
- ap_out->port = router->or_port;
- }
- int
- router_has_addr(const routerinfo_t *router, const tor_addr_t *addr)
- {
- return
- tor_addr_eq_ipv4h(addr, router->addr) ||
- tor_addr_eq(&router->ipv6_addr, addr);
- }
- int
- router_has_orport(const routerinfo_t *router, const tor_addr_port_t *orport)
- {
- return
- (tor_addr_eq_ipv4h(&orport->addr, router->addr) &&
- orport->port == router->or_port) ||
- (tor_addr_eq(&orport->addr, &router->ipv6_addr) &&
- orport->port == router->ipv6_orport);
- }
- static int
- load_stats_file(const char *filename, const char *end_line, time_t now,
- char **out)
- {
- int r = -1;
- char *fname = get_datadir_fname(filename);
- char *contents, *start = NULL, *tmp, timestr[ISO_TIME_LEN+1];
- time_t written;
- switch (file_status(fname)) {
- case FN_FILE:
-
- if ((contents = read_file_to_str(fname, 0, NULL))) {
- tmp = strstr(contents, end_line);
-
- while (tmp) {
- start = tmp;
- tmp = strstr(tmp + 1, end_line);
- }
- if (!start)
- goto notfound;
- if (strlen(start) < strlen(end_line) + 1 + sizeof(timestr))
- goto notfound;
- strlcpy(timestr, start + 1 + strlen(end_line), sizeof(timestr));
- if (parse_iso_time(timestr, &written) < 0)
- goto notfound;
- if (written < now - (25*60*60) || written > now + (1*60*60))
- goto notfound;
- *out = tor_strdup(start);
- r = 1;
- }
- notfound:
- tor_free(contents);
- break;
-
- case FN_NOENT:
- case FN_EMPTY:
- r = 0;
- break;
- case FN_ERROR:
- case FN_DIR:
- default:
- break;
- }
- tor_free(fname);
- return r;
- }
- int
- extrainfo_dump_to_string(char **s_out, extrainfo_t *extrainfo,
- crypto_pk_t *ident_key,
- const ed25519_keypair_t *signing_keypair)
- {
- const or_options_t *options = get_options();
- char identity[HEX_DIGEST_LEN+1];
- char published[ISO_TIME_LEN+1];
- char digest[DIGEST_LEN];
- char *bandwidth_usage;
- int result;
- static int write_stats_to_extrainfo = 1;
- char sig[DIROBJ_MAX_SIG_LEN+1];
- char *s = NULL, *pre, *contents, *cp, *s_dup = NULL;
- time_t now = time(NULL);
- smartlist_t *chunks = smartlist_new();
- extrainfo_t *ei_tmp = NULL;
- const int emit_ed_sigs = signing_keypair &&
- extrainfo->cache_info.signing_key_cert;
- char *ed_cert_line = NULL;
- base16_encode(identity, sizeof(identity),
- extrainfo->cache_info.identity_digest, DIGEST_LEN);
- format_iso_time(published, extrainfo->cache_info.published_on);
- bandwidth_usage = rep_hist_get_bandwidth_lines();
- if (emit_ed_sigs) {
- if (!extrainfo->cache_info.signing_key_cert->signing_key_included ||
- !ed25519_pubkey_eq(&extrainfo->cache_info.signing_key_cert->signed_key,
- &signing_keypair->pubkey)) {
- log_warn(LD_BUG, "Tried to sign a extrainfo descriptor with a "
- "mismatched ed25519 key chain %d",
- extrainfo->cache_info.signing_key_cert->signing_key_included);
- goto err;
- }
- char ed_cert_base64[256];
- if (base64_encode(ed_cert_base64, sizeof(ed_cert_base64),
- (const char*)extrainfo->cache_info.signing_key_cert->encoded,
- extrainfo->cache_info.signing_key_cert->encoded_len,
- BASE64_ENCODE_MULTILINE) < 0) {
- log_err(LD_BUG,"Couldn't base64-encode signing key certificate!");
- goto err;
- }
- tor_asprintf(&ed_cert_line, "identity-ed25519\n"
- "-----BEGIN ED25519 CERT-----\n"
- "%s"
- "-----END ED25519 CERT-----\n", ed_cert_base64);
- } else {
- ed_cert_line = tor_strdup("");
- }
- tor_asprintf(&pre, "extra-info %s %s\n%spublished %s\n%s",
- extrainfo->nickname, identity,
- ed_cert_line,
- published, bandwidth_usage);
- smartlist_add(chunks, pre);
- if (geoip_is_loaded(AF_INET))
- smartlist_add_asprintf(chunks, "geoip-db-digest %s\n",
- geoip_db_digest(AF_INET));
- if (geoip_is_loaded(AF_INET6))
- smartlist_add_asprintf(chunks, "geoip6-db-digest %s\n",
- geoip_db_digest(AF_INET6));
- if (options->ExtraInfoStatistics && write_stats_to_extrainfo) {
- log_info(LD_GENERAL, "Adding stats to extra-info descriptor.");
- if (options->DirReqStatistics &&
- load_stats_file("stats"PATH_SEPARATOR"dirreq-stats",
- "dirreq-stats-end", now, &contents) > 0) {
- smartlist_add(chunks, contents);
- }
- if (options->HiddenServiceStatistics &&
- load_stats_file("stats"PATH_SEPARATOR"hidserv-stats",
- "hidserv-stats-end", now, &contents) > 0) {
- smartlist_add(chunks, contents);
- }
- if (options->EntryStatistics &&
- load_stats_file("stats"PATH_SEPARATOR"entry-stats",
- "entry-stats-end", now, &contents) > 0) {
- smartlist_add(chunks, contents);
- }
- if (options->CellStatistics &&
- load_stats_file("stats"PATH_SEPARATOR"buffer-stats",
- "cell-stats-end", now, &contents) > 0) {
- smartlist_add(chunks, contents);
- }
- if (options->ExitPortStatistics &&
- load_stats_file("stats"PATH_SEPARATOR"exit-stats",
- "exit-stats-end", now, &contents) > 0) {
- smartlist_add(chunks, contents);
- }
- if (options->ConnDirectionStatistics &&
- load_stats_file("stats"PATH_SEPARATOR"conn-stats",
- "conn-bi-direct", now, &contents) > 0) {
- smartlist_add(chunks, contents);
- }
- }
- if (options->PaddingStatistics) {
- contents = rep_hist_get_padding_count_lines();
- if (contents)
- smartlist_add(chunks, contents);
- }
-
- if (options->ServerTransportPlugin) {
- char *pluggable_transports = pt_get_extra_info_descriptor_string();
- if (pluggable_transports)
- smartlist_add(chunks, pluggable_transports);
- }
- if (should_record_bridge_info(options) && write_stats_to_extrainfo) {
- const char *bridge_stats = geoip_get_bridge_stats_extrainfo(now);
- if (bridge_stats) {
- smartlist_add_strdup(chunks, bridge_stats);
- }
- }
- if (emit_ed_sigs) {
- char sha256_digest[DIGEST256_LEN];
- smartlist_add_strdup(chunks, "router-sig-ed25519 ");
- crypto_digest_smartlist_prefix(sha256_digest, DIGEST256_LEN,
- ED_DESC_SIGNATURE_PREFIX,
- chunks, "", DIGEST_SHA256);
- ed25519_signature_t ed_sig;
- char buf[ED25519_SIG_BASE64_LEN+1];
- if (ed25519_sign(&ed_sig, (const uint8_t*)sha256_digest, DIGEST256_LEN,
- signing_keypair) < 0)
- goto err;
- if (ed25519_signature_to_base64(buf, &ed_sig) < 0)
- goto err;
- smartlist_add_asprintf(chunks, "%s\n", buf);
- }
- smartlist_add_strdup(chunks, "router-signature\n");
- s = smartlist_join_strings(chunks, "", 0, NULL);
- while (strlen(s) > MAX_EXTRAINFO_UPLOAD_SIZE - DIROBJ_MAX_SIG_LEN) {
-
- if (smartlist_len(chunks) > 2) {
-
- int idx = smartlist_len(chunks) - 2;
- char *e = smartlist_get(chunks, idx);
- smartlist_del_keeporder(chunks, idx);
- log_warn(LD_GENERAL, "We just generated an extra-info descriptor "
- "with statistics that exceeds the 50 KB "
- "upload limit. Removing last added "
- "statistics.");
- tor_free(e);
- tor_free(s);
- s = smartlist_join_strings(chunks, "", 0, NULL);
- } else {
- log_warn(LD_BUG, "We just generated an extra-info descriptors that "
- "exceeds the 50 KB upload limit.");
- goto err;
- }
- }
- memset(sig, 0, sizeof(sig));
- if (router_get_extrainfo_hash(s, strlen(s), digest) < 0 ||
- router_append_dirobj_signature(sig, sizeof(sig), digest, DIGEST_LEN,
- ident_key) < 0) {
- log_warn(LD_BUG, "Could not append signature to extra-info "
- "descriptor.");
- goto err;
- }
- smartlist_add_strdup(chunks, sig);
- tor_free(s);
- s = smartlist_join_strings(chunks, "", 0, NULL);
- cp = s_dup = tor_strdup(s);
- ei_tmp = extrainfo_parse_entry_from_string(cp, NULL, 1, NULL, NULL);
- if (!ei_tmp) {
- if (write_stats_to_extrainfo) {
- log_warn(LD_GENERAL, "We just generated an extra-info descriptor "
- "with statistics that we can't parse. Not "
- "adding statistics to this or any future "
- "extra-info descriptors.");
- write_stats_to_extrainfo = 0;
- result = extrainfo_dump_to_string(s_out, extrainfo, ident_key,
- signing_keypair);
- goto done;
- } else {
- log_warn(LD_BUG, "We just generated an extrainfo descriptor we "
- "can't parse.");
- goto err;
- }
- }
- *s_out = s;
- s = NULL;
- result = 0;
- goto done;
- err:
- result = -1;
- done:
- tor_free(s);
- SMARTLIST_FOREACH(chunks, char *, chunk, tor_free(chunk));
- smartlist_free(chunks);
- tor_free(s_dup);
- tor_free(ed_cert_line);
- extrainfo_free(ei_tmp);
- tor_free(bandwidth_usage);
- return result;
- }
- int
- is_legal_nickname(const char *s)
- {
- size_t len;
- tor_assert(s);
- len = strlen(s);
- return len > 0 && len <= MAX_NICKNAME_LEN &&
- strspn(s,LEGAL_NICKNAME_CHARACTERS) == len;
- }
- int
- is_legal_nickname_or_hexdigest(const char *s)
- {
- if (*s!='$')
- return is_legal_nickname(s);
- else
- return is_legal_hexdigest(s);
- }
- int
- is_legal_hexdigest(const char *s)
- {
- size_t len;
- tor_assert(s);
- if (s[0] == '$') s++;
- len = strlen(s);
- if (len > HEX_DIGEST_LEN) {
- if (s[HEX_DIGEST_LEN] == '=' ||
- s[HEX_DIGEST_LEN] == '~') {
- if (!is_legal_nickname(s+HEX_DIGEST_LEN+1))
- return 0;
- } else {
- return 0;
- }
- }
- return (len >= HEX_DIGEST_LEN &&
- strspn(s,HEX_CHARACTERS)==HEX_DIGEST_LEN);
- }
- #define NODE_DESC_BUF_LEN (MAX_VERBOSE_NICKNAME_LEN+4+TOR_ADDR_BUF_LEN)
- const char *
- format_node_description(char *buf,
- const char *id_digest,
- int is_named,
- const char *nickname,
- const tor_addr_t *addr,
- uint32_t addr32h)
- {
- char *cp;
- if (!buf)
- return "<NULL BUFFER>";
- buf[0] = '$';
- base16_encode(buf+1, HEX_DIGEST_LEN+1, id_digest, DIGEST_LEN);
- cp = buf+1+HEX_DIGEST_LEN;
- if (nickname) {
- buf[1+HEX_DIGEST_LEN] = is_named ? '=' : '~';
- strlcpy(buf+1+HEX_DIGEST_LEN+1, nickname, MAX_NICKNAME_LEN+1);
- cp += strlen(cp);
- }
- if (addr32h || addr) {
- memcpy(cp, " at ", 4);
- cp += 4;
- if (addr) {
- tor_addr_to_str(cp, addr, TOR_ADDR_BUF_LEN, 0);
- } else {
- struct in_addr in;
- in.s_addr = htonl(addr32h);
- tor_inet_ntoa(&in, cp, INET_NTOA_BUF_LEN);
- }
- }
- return buf;
- }
- const char *
- router_describe(const routerinfo_t *ri)
- {
- static char buf[NODE_DESC_BUF_LEN];
- if (!ri)
- return "<null>";
- return format_node_description(buf,
- ri->cache_info.identity_digest,
- 0,
- ri->nickname,
- NULL,
- ri->addr);
- }
- const char *
- node_describe(const node_t *node)
- {
- static char buf[NODE_DESC_BUF_LEN];
- const char *nickname = NULL;
- uint32_t addr32h = 0;
- int is_named = 0;
- if (!node)
- return "<null>";
- if (node->rs) {
- nickname = node->rs->nickname;
- is_named = node->rs->is_named;
- addr32h = node->rs->addr;
- } else if (node->ri) {
- nickname = node->ri->nickname;
- addr32h = node->ri->addr;
- }
- return format_node_description(buf,
- node->identity,
- is_named,
- nickname,
- NULL,
- addr32h);
- }
- const char *
- routerstatus_describe(const routerstatus_t *rs)
- {
- static char buf[NODE_DESC_BUF_LEN];
- if (!rs)
- return "<null>";
- return format_node_description(buf,
- rs->identity_digest,
- rs->is_named,
- rs->nickname,
- NULL,
- rs->addr);
- }
- const char *
- extend_info_describe(const extend_info_t *ei)
- {
- static char buf[NODE_DESC_BUF_LEN];
- if (!ei)
- return "<null>";
- return format_node_description(buf,
- ei->identity_digest,
- 0,
- ei->nickname,
- &ei->addr,
- 0);
- }
- void
- router_get_verbose_nickname(char *buf, const routerinfo_t *router)
- {
- buf[0] = '$';
- base16_encode(buf+1, HEX_DIGEST_LEN+1, router->cache_info.identity_digest,
- DIGEST_LEN);
- buf[1+HEX_DIGEST_LEN] = '~';
- strlcpy(buf+1+HEX_DIGEST_LEN+1, router->nickname, MAX_NICKNAME_LEN+1);
- }
- void
- router_reset_warnings(void)
- {
- if (warned_nonexistent_family) {
- SMARTLIST_FOREACH(warned_nonexistent_family, char *, cp, tor_free(cp));
- smartlist_clear(warned_nonexistent_family);
- }
- }
- const char *
- router_purpose_to_string(uint8_t p)
- {
- switch (p)
- {
- case ROUTER_PURPOSE_GENERAL: return "general";
- case ROUTER_PURPOSE_BRIDGE: return "bridge";
- case ROUTER_PURPOSE_CONTROLLER: return "controller";
- default:
- tor_assert(0);
- }
- return NULL;
- }
- uint8_t
- router_purpose_from_string(const char *s)
- {
- if (!strcmp(s, "general"))
- return ROUTER_PURPOSE_GENERAL;
- else if (!strcmp(s, "bridge"))
- return ROUTER_PURPOSE_BRIDGE;
- else if (!strcmp(s, "controller"))
- return ROUTER_PURPOSE_CONTROLLER;
- else
- return ROUTER_PURPOSE_UNKNOWN;
- }
- void
- router_free_all(void)
- {
- crypto_pk_free(onionkey);
- crypto_pk_free(lastonionkey);
- crypto_pk_free(server_identitykey);
- crypto_pk_free(client_identitykey);
- tor_mutex_free(key_lock);
- routerinfo_free(desc_routerinfo);
- extrainfo_free(desc_extrainfo);
- crypto_pk_free(authority_signing_key);
- authority_cert_free(authority_key_certificate);
- crypto_pk_free(legacy_signing_key);
- authority_cert_free(legacy_key_certificate);
- memwipe(&curve25519_onion_key, 0, sizeof(curve25519_onion_key));
- memwipe(&last_curve25519_onion_key, 0, sizeof(last_curve25519_onion_key));
- if (warned_nonexistent_family) {
- SMARTLIST_FOREACH(warned_nonexistent_family, char *, cp, tor_free(cp));
- smartlist_free(warned_nonexistent_family);
- }
- }
- smartlist_t *
- router_get_all_orports(const routerinfo_t *ri)
- {
- tor_assert(ri);
- node_t fake_node;
- memset(&fake_node, 0, sizeof(fake_node));
-
- fake_node.ri = (routerinfo_t *)ri;
- return node_get_all_orports(&fake_node);
- }
|