X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fprotocol_key.c;h=b409a357eab66dfca03459751ce3aab052109876;hb=0c7e0210d900185d4c1a9ffd969dc2a26d9523a9;hp=016fbff7733bb871b2904c55559cbe69fdbadfcc;hpb=3c5655f59e85d312d11fa04489123e604920f95b;p=tinc diff --git a/src/protocol_key.c b/src/protocol_key.c index 016fbff7..b409a357 100644 --- a/src/protocol_key.c +++ b/src/protocol_key.c @@ -1,7 +1,7 @@ /* protocol_key.c -- handle the meta-protocol, key exchange - Copyright (C) 1999-2002 Ivo Timmermans , - 2000-2002 Guus Sliepen + Copyright (C) 1999-2005 Ivo Timmermans, + 2000-2014 Guus Sliepen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -13,274 +13,505 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id: protocol_key.c,v 1.1.4.6 2002/03/22 13:31:18 guus Exp $ + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#include "config.h" - -#include -#include -#include -#include -#include -#include - -#include -#include -#include +#include "system.h" -#include "conf.h" +#include "cipher.h" +#include "connection.h" +#include "crypto.h" +#include "logger.h" #include "net.h" #include "netutl.h" -#include "protocol.h" -#include "meta.h" -#include "connection.h" #include "node.h" -#include "edge.h" +#include "prf.h" +#include "protocol.h" +#include "sptps.h" +#include "utils.h" +#include "xalloc.h" -#include "system.h" +static bool mykeyused = false; + +void send_key_changed(void) { +#ifndef DISABLE_LEGACY + send_request(everyone, "%d %x %s", KEY_CHANGED, rand(), myself->name); + + /* Immediately send new keys to directly connected nodes to keep UDP mappings alive */ + + for list_each(connection_t, c, connection_list) + if(c->edge && c->node && c->node->status.reachable && !c->node->status.sptps) + send_ans_key(c->node); +#endif + + /* Force key exchange for connections using SPTPS */ + + if(experimental) { + for splay_each(node_t, n, node_tree) + if(n->status.reachable && n->status.validkey && n->status.sptps) + sptps_force_kex(&n->sptps); + } +} + +bool key_changed_h(connection_t *c, const char *request) { + char name[MAX_STRING_SIZE]; + node_t *n; + + if(sscanf(request, "%*d %*x " MAX_STRING, name) != 1) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "KEY_CHANGED", + c->name, c->hostname); + return false; + } + + if(seen_request(request)) + return true; + + n = lookup_node(name); + + if(!n) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got %s from %s (%s) origin %s which does not exist", + "KEY_CHANGED", c->name, c->hostname, name); + return true; + } + + if(!n->status.sptps) { + n->status.validkey = false; + n->last_req_key = 0; + } + + /* Tell the others */ + + if(!tunnelserver) + forward_request(c, request); -int mykeyused = 0; - -int send_key_changed(connection_t *c, node_t *n) -{ - connection_t *other; - avl_node_t *node; -cp - /* Only send this message if some other daemon requested our key previously. - This reduces unnecessary key_changed broadcasts. - */ - - if(n == myself && !mykeyused) - return 0; - - for(node = connection_tree->head; node; node = node->next) - { - other = (connection_t *)node->data; - if(other->status.active && other != c) - send_request(other, "%d %lx %s", KEY_CHANGED, random(), n->name); - } -cp - return 0; + return true; } -int key_changed_h(connection_t *c) -{ - char name[MAX_STRING_SIZE]; - avl_node_t *node; - connection_t *other; - node_t *n; -cp - if(sscanf(c->buffer, "%*d %*x "MAX_STRING, name) != 1) - { - syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "KEY_CHANGED", - c->name, c->hostname); - return -1; - } - - if(seen_request(c->buffer)) - return 0; - - n = lookup_node(name); - - if(!n) - { - syslog(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist"), "KEY_CHANGED", - c->name, c->hostname, name); - return -1; - } - - n->status.validkey = 0; - n->status.waitingforkey = 0; - n->sent_seqno = 0; - - /* Tell the others */ - - for(node = connection_tree->head; node; node = node->next) - { - other = (connection_t *)node->data; - if(other->status.active && other != c) - send_request(other, "%s", c->buffer); - } -cp - return 0; +static bool send_sptps_data_myself(void *handle, uint8_t type, const void *data, size_t len) { + return send_sptps_data(handle, myself, type, data, len); } -int send_req_key(connection_t *c, node_t *from, node_t *to) -{ -cp - return send_request(c, "%d %s %s", REQ_KEY, - from->name, to->name); +static bool send_initial_sptps_data(void *handle, uint8_t type, const void *data, size_t len) { + node_t *to = handle; + to->sptps.send_data = send_sptps_data_myself; + char buf[len * 4 / 3 + 5]; + b64encode(data, buf, len); + return send_request(to->nexthop->connection, "%d %s %s %d %s", REQ_KEY, myself->name, to->name, REQ_KEY, buf); } -int req_key_h(connection_t *c) -{ - char from_name[MAX_STRING_SIZE]; - char to_name[MAX_STRING_SIZE]; - node_t *from, *to; -cp - if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING, from_name, to_name) != 2) - { - syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "REQ_KEY", - c->name, c->hostname); - return -1; - } - - from = lookup_node(from_name); - - if(!from) - { - syslog(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist in our connection list"), "REQ_KEY", - c->name, c->hostname, from_name); - return -1; - } - - to = lookup_node(to_name); - - if(!to) - { - syslog(LOG_ERR, _("Got %s from %s (%s) destination %s which does not exist in our connection list"), "REQ_KEY", - c->name, c->hostname, to_name); - return -1; - } - - /* Check if this key request is for us */ - - if(to == myself) /* Yes, send our own key back */ - { - mykeyused = 1; - from->received_seqno = 0; - send_ans_key(c, myself, from); - } - else - { -/* Proxy keys - if(to->status.validkey) - { - send_ans_key(c, to, from); - } - else -*/ - send_req_key(to->nexthop->connection, from, to); - } +bool send_req_key(node_t *to) { + if(to->status.sptps) { + if(!node_read_ecdsa_public_key(to)) { + logger(DEBUG_PROTOCOL, LOG_DEBUG, "No Ed25519 key known for %s (%s)", to->name, to->hostname); + send_request(to->nexthop->connection, "%d %s %s %d", REQ_KEY, myself->name, to->name, REQ_PUBKEY); + return true; + } + + char label[25 + strlen(myself->name) + strlen(to->name)]; + snprintf(label, sizeof label, "tinc UDP key expansion %s %s", myself->name, to->name); + sptps_stop(&to->sptps); + to->status.validkey = false; + to->status.waitingforkey = true; + to->last_req_key = now.tv_sec; + to->incompression = myself->incompression; + return sptps_start(&to->sptps, to, true, true, myself->connection->ecdsa, to->ecdsa, label, sizeof label, send_initial_sptps_data, receive_sptps_record); + } -cp - return 0; + return send_request(to->nexthop->connection, "%d %s %s", REQ_KEY, myself->name, to->name); } -int send_ans_key(connection_t *c, node_t *from, node_t *to) -{ - char key[MAX_STRING_SIZE]; -cp - bin2hex(from->key, key, from->keylength); - key[from->keylength * 2] = '\0'; -cp - return send_request(c, "%d %s %s %s %d %d %d %d", ANS_KEY, - from->name, to->name, key, from->cipher?from->cipher->nid:0, from->digest?from->digest->type:0, from->maclength, from->compression); +/* REQ_KEY is overloaded to allow arbitrary requests to be routed between two nodes. */ + +static bool req_key_ext_h(connection_t *c, const char *request, node_t *from, node_t *to, int reqno) { + /* If this is a SPTPS packet, see if sending UDP info helps. + Note that we only do this if we're the destination or the static relay; + otherwise every hop would initiate its own UDP info message, resulting in elevated chatter. */ + if((reqno == REQ_KEY || reqno == SPTPS_PACKET) && to->via == myself) + send_udp_info(myself, from); + + if(reqno == SPTPS_PACKET) { + /* This is a SPTPS data packet. */ + + char buf[MAX_STRING_SIZE]; + int len; + if(sscanf(request, "%*d %*s %*s %*d " MAX_STRING, buf) != 1 || !(len = b64decode(buf, buf, strlen(buf)))) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s) to %s (%s): %s", "SPTPS_PACKET", from->name, from->hostname, to->name, to->hostname, "invalid SPTPS data"); + return true; + } + + if(to != myself) { + /* We don't just forward the request, because we want to use UDP if it's available. */ + send_sptps_data(to, from, 0, buf, len); + try_tx(to, true); + } else { + /* The packet is for us */ + if(!sptps_receive_data(&from->sptps, buf, len)) { + /* Uh-oh. It might be that the tunnel is stuck in some corrupted state, + so let's restart SPTPS in case that helps. But don't do that too often + to prevent storms. */ + if(from->last_req_key < now.tv_sec - 10) { + logger(DEBUG_PROTOCOL, LOG_ERR, "Failed to decode TCP packet from %s (%s), restarting SPTPS", from->name, from->hostname); + send_req_key(from); + } + return true; + } + send_mtu_info(myself, from, MTU); + } + + return true; + } + + /* Requests that are not SPTPS data packets are forwarded as-is. */ + + if (to != myself) + return send_request(to->nexthop->connection, "%s", request); + + /* The request is for us */ + + switch(reqno) { + case REQ_PUBKEY: { + if(!node_read_ecdsa_public_key(from)) { + /* Request their key *before* we send our key back. Otherwise the first SPTPS packet from them will get dropped. */ + logger(DEBUG_PROTOCOL, LOG_DEBUG, "Preemptively requesting Ed25519 key for %s (%s)", from->name, from->hostname); + send_request(from->nexthop->connection, "%d %s %s %d", REQ_KEY, myself->name, from->name, REQ_PUBKEY); + } + char *pubkey = ecdsa_get_base64_public_key(myself->connection->ecdsa); + send_request(from->nexthop->connection, "%d %s %s %d %s", REQ_KEY, myself->name, from->name, ANS_PUBKEY, pubkey); + free(pubkey); + return true; + } + + case ANS_PUBKEY: { + if(node_read_ecdsa_public_key(from)) { + logger(DEBUG_PROTOCOL, LOG_WARNING, "Got ANS_PUBKEY from %s (%s) even though we already have his pubkey", from->name, from->hostname); + return true; + } + + char pubkey[MAX_STRING_SIZE]; + if(sscanf(request, "%*d %*s %*s %*d " MAX_STRING, pubkey) != 1 || !(from->ecdsa = ecdsa_set_base64_public_key(pubkey))) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s): %s", "ANS_PUBKEY", from->name, from->hostname, "invalid pubkey"); + return true; + } + + logger(DEBUG_PROTOCOL, LOG_INFO, "Learned Ed25519 public key from %s (%s)", from->name, from->hostname); + append_config_file(from->name, "Ed25519PublicKey", pubkey); + return true; + } + + case REQ_KEY: { + if(!node_read_ecdsa_public_key(from)) { + logger(DEBUG_PROTOCOL, LOG_DEBUG, "No Ed25519 key known for %s (%s)", from->name, from->hostname); + send_request(from->nexthop->connection, "%d %s %s %d", REQ_KEY, myself->name, from->name, REQ_PUBKEY); + return true; + } + + if(from->sptps.label) + logger(DEBUG_ALWAYS, LOG_DEBUG, "Got REQ_KEY from %s while we already started a SPTPS session!", from->name); + + char buf[MAX_STRING_SIZE]; + int len; + + if(sscanf(request, "%*d %*s %*s %*d " MAX_STRING, buf) != 1 || !(len = b64decode(buf, buf, strlen(buf)))) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s): %s", "REQ_SPTPS_START", from->name, from->hostname, "invalid SPTPS data"); + return true; + } + + char label[25 + strlen(from->name) + strlen(myself->name)]; + snprintf(label, sizeof label, "tinc UDP key expansion %s %s", from->name, myself->name); + sptps_stop(&from->sptps); + from->status.validkey = false; + from->status.waitingforkey = true; + from->last_req_key = now.tv_sec; + sptps_start(&from->sptps, from, false, true, myself->connection->ecdsa, from->ecdsa, label, sizeof label, send_sptps_data_myself, receive_sptps_record); + sptps_receive_data(&from->sptps, buf, len); + send_mtu_info(myself, from, MTU); + return true; + } + + default: + logger(DEBUG_ALWAYS, LOG_ERR, "Unknown extended REQ_KEY request from %s (%s): %s", from->name, from->hostname, request); + return true; + } } -int ans_key_h(connection_t *c) -{ - char from_name[MAX_STRING_SIZE]; - char to_name[MAX_STRING_SIZE]; - char key[MAX_STRING_SIZE]; - int cipher, digest, maclength, compression; - node_t *from, *to; -cp - if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %d %d %d", from_name, to_name, key, &cipher, &digest, &maclength, &compression) != 7) - { - syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ANS_KEY", - c->name, c->hostname); - return -1; - } - - from = lookup_node(from_name); - - if(!from) - { - syslog(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist in our connection list"), "ANS_KEY", - c->name, c->hostname, from_name); - return -1; - } - - to = lookup_node(to_name); - - if(!to) - { - syslog(LOG_ERR, _("Got %s from %s (%s) destination %s which does not exist in our connection list"), "ANS_KEY", - c->name, c->hostname, to_name); - return -1; - } - - /* Forward it if necessary */ - - if(to != myself) - { - return send_request(to->nexthop->connection, "%s", c->buffer); - } - - /* Update our copy of the origin's packet key */ - - if(from->key) - free(from->key); - - from->key = xstrdup(key); - from->keylength = strlen(key) / 2; - hex2bin(from->key, from->key, from->keylength); - from->key[from->keylength] = '\0'; - - from->status.validkey = 1; - from->status.waitingforkey = 0; - - /* Check and lookup cipher and digest algorithms */ - - if(cipher) - { - from->cipher = EVP_get_cipherbynid(cipher); - if(!from->cipher) - { - syslog(LOG_ERR, _("Node %s (%s) uses unknown cipher!"), from->name, from->hostname); - return -1; +bool req_key_h(connection_t *c, const char *request) { + char from_name[MAX_STRING_SIZE]; + char to_name[MAX_STRING_SIZE]; + node_t *from, *to; + int reqno = 0; + + if(sscanf(request, "%*d " MAX_STRING " " MAX_STRING " %d", from_name, to_name, &reqno) < 2) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "REQ_KEY", c->name, + c->hostname); + return false; + } + + if(!check_id(from_name) || !check_id(to_name)) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s): %s", "REQ_KEY", c->name, c->hostname, "invalid name"); + return false; + } + + from = lookup_node(from_name); + + if(!from) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got %s from %s (%s) origin %s which does not exist in our connection list", + "REQ_KEY", c->name, c->hostname, from_name); + return true; } - if(from->keylength != from->cipher->key_len + from->cipher->iv_len) - { - syslog(LOG_ERR, _("Node %s (%s) uses wrong keylength!"), from->name, from->hostname); - return -1; - } - } - else - { - from->cipher = NULL; - } - - from->maclength = maclength; - - if(digest) - { - from->digest = EVP_get_digestbynid(digest); - if(!from->digest) - { - syslog(LOG_ERR, _("Node %s (%s) uses unknown digest!"), from->name, from->hostname); - return -1; + + to = lookup_node(to_name); + + if(!to) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got %s from %s (%s) destination %s which does not exist in our connection list", + "REQ_KEY", c->name, c->hostname, to_name); + return true; } - if(from->maclength > from->digest->md_size || from->maclength < 0) - { - syslog(LOG_ERR, _("Node %s (%s) uses bogus MAC length!"), from->name, from->hostname); - return -1; + + /* Check if this key request is for us */ + + if(to == myself) { /* Yes */ + /* Is this an extended REQ_KEY message? */ + if(experimental && reqno) + return req_key_ext_h(c, request, from, to, reqno); + + /* No, just send our key back */ + send_ans_key(from); + } else { + if(tunnelserver) + return true; + + if(!to->status.reachable) { + logger(DEBUG_PROTOCOL, LOG_WARNING, "Got %s from %s (%s) destination %s which is not reachable", + "REQ_KEY", c->name, c->hostname, to_name); + return true; + } + + /* Is this an extended REQ_KEY message? */ + if(experimental && reqno) + return req_key_ext_h(c, request, from, to, reqno); + + send_request(to->nexthop->connection, "%s", request); } - } - else - { - from->digest = NULL; - } - - from->compression = compression; - - flush_queue(from); -cp - return 0; + + return true; +} + +bool send_ans_key(node_t *to) { + if(to->status.sptps) + abort(); + +#ifdef DISABLE_LEGACY + return false; +#else + size_t keylen = myself->incipher ? cipher_keylength(myself->incipher) : 1; + char key[keylen * 2 + 1]; + + randomize(key, keylen); + + cipher_close(to->incipher); + digest_close(to->indigest); + + if(myself->incipher) { + to->incipher = cipher_open_by_nid(cipher_get_nid(myself->incipher)); + if(!to->incipher) + abort(); + if(!cipher_set_key(to->incipher, key, false)) + abort(); + } + + if(myself->indigest) { + to->indigest = digest_open_by_nid(digest_get_nid(myself->indigest), digest_length(myself->indigest)); + if(!to->indigest) + abort(); + if(!digest_set_key(to->indigest, key, keylen)) + abort(); + } + + to->incompression = myself->incompression; + + bin2hex(key, key, keylen); + + // Reset sequence number and late packet window + mykeyused = true; + to->received_seqno = 0; + to->received = 0; + if(replaywin) memset(to->late, 0, replaywin); + + to->status.validkey_in = true; + + return send_request(to->nexthop->connection, "%d %s %s %s %d %d %d %d", ANS_KEY, + myself->name, to->name, key, + cipher_get_nid(to->incipher), + digest_get_nid(to->indigest), + (int)digest_length(to->indigest), + to->incompression); +#endif +} + +bool ans_key_h(connection_t *c, const char *request) { + char from_name[MAX_STRING_SIZE]; + char to_name[MAX_STRING_SIZE]; + char key[MAX_STRING_SIZE]; + char address[MAX_STRING_SIZE] = ""; + char port[MAX_STRING_SIZE] = ""; + int cipher, digest, maclength, compression, keylen; + node_t *from, *to; + + if(sscanf(request, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %d %d %d "MAX_STRING" "MAX_STRING, + from_name, to_name, key, &cipher, &digest, &maclength, + &compression, address, port) < 7) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "ANS_KEY", c->name, + c->hostname); + return false; + } + + if(!check_id(from_name) || !check_id(to_name)) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s): %s", "ANS_KEY", c->name, c->hostname, "invalid name"); + return false; + } + + from = lookup_node(from_name); + + if(!from) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got %s from %s (%s) origin %s which does not exist in our connection list", + "ANS_KEY", c->name, c->hostname, from_name); + return true; + } + + to = lookup_node(to_name); + + if(!to) { + logger(DEBUG_ALWAYS, LOG_ERR, "Got %s from %s (%s) destination %s which does not exist in our connection list", + "ANS_KEY", c->name, c->hostname, to_name); + return true; + } + + /* Forward it if necessary */ + + if(to != myself) { + if(tunnelserver) + return true; + + if(!to->status.reachable) { + logger(DEBUG_ALWAYS, LOG_WARNING, "Got %s from %s (%s) destination %s which is not reachable", + "ANS_KEY", c->name, c->hostname, to_name); + return true; + } + + if(!*address && from->address.sa.sa_family != AF_UNSPEC) { + char *address, *port; + logger(DEBUG_PROTOCOL, LOG_DEBUG, "Appending reflexive UDP address to ANS_KEY from %s to %s", from->name, to->name); + sockaddr2str(&from->address, &address, &port); + send_request(to->nexthop->connection, "%s %s %s", request, address, port); + free(address); + free(port); + return true; + } + + return send_request(to->nexthop->connection, "%s", request); + } + +#ifndef DISABLE_LEGACY + /* Don't use key material until every check has passed. */ + cipher_close(from->outcipher); + digest_close(from->outdigest); +#endif + from->status.validkey = false; + + if(compression < 0 || compression > 11) { + logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses bogus compression level!", from->name, from->hostname); + return true; + } + + from->outcompression = compression; + + /* SPTPS or old-style key exchange? */ + + if(from->status.sptps) { + char buf[strlen(key)]; + int len = b64decode(key, buf, strlen(key)); + if(!len || !sptps_receive_data(&from->sptps, buf, len)) { + /* Uh-oh. It might be that the tunnel is stuck in some corrupted state, + so let's restart SPTPS in case that helps. But don't do that too often + to prevent storms. + Note that simply relying on handshake timeout is not enough, because + that doesn't apply to key regeneration. */ + if(from->last_req_key < now.tv_sec - 10) { + logger(DEBUG_PROTOCOL, LOG_ERR, "Failed to decode handshake TCP packet from %s (%s), restarting SPTPS", from->name, from->hostname); + send_req_key(from); + } + return true; + } + + if(from->status.validkey) { + if(*address && *port) { + logger(DEBUG_PROTOCOL, LOG_DEBUG, "Using reflexive UDP address from %s: %s port %s", from->name, address, port); + sockaddr_t sa = str2sockaddr(address, port); + update_node_udp(from, &sa); + } + } + + send_mtu_info(myself, from, MTU); + + return true; + } + +#ifdef DISABLE_LEGACY + logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses legacy protocol!", from->name, from->hostname); + return false; +#else + /* Check and lookup cipher and digest algorithms */ + + if(cipher) { + if(!(from->outcipher = cipher_open_by_nid(cipher))) { + logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses unknown cipher!", from->name, from->hostname); + return false; + } + } else { + from->outcipher = NULL; + } + + if(digest) { + if(!(from->outdigest = digest_open_by_nid(digest, maclength))) { + logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses unknown digest!", from->name, from->hostname); + return false; + } + } else { + from->outdigest = NULL; + } + + if(maclength != digest_length(from->outdigest)) { + logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses bogus MAC length!", from->name, from->hostname); + return false; + } + + /* Process key */ + + keylen = hex2bin(key, key, sizeof key); + + if(keylen != (from->outcipher ? cipher_keylength(from->outcipher) : 1)) { + logger(DEBUG_ALWAYS, LOG_ERR, "Node %s (%s) uses wrong keylength!", from->name, from->hostname); + return true; + } + + /* Update our copy of the origin's packet key */ + + if(from->outcipher && !cipher_set_key(from->outcipher, key, true)) + return false; + if(from->outdigest && !digest_set_key(from->outdigest, key, keylen)) + return false; + + from->status.validkey = true; + from->sent_seqno = 0; + + if(*address && *port) { + logger(DEBUG_PROTOCOL, LOG_DEBUG, "Using reflexive UDP address from %s: %s port %s", from->name, address, port); + sockaddr_t sa = str2sockaddr(address, port); + update_node_udp(from, &sa); + } + + return true; +#endif }