X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fpokey%2Fprotocol_key.c;fp=src%2Fpokey%2Fprotocol_key.c;h=0000000000000000000000000000000000000000;hb=013a2e159e42c46808ea8d0b6abd57525db30a50;hp=6ccf3664b9ea9e259493edd4027ebf1914b1523e;hpb=efa5148bc76effb440d807d653dda02de050fde0;p=tinc diff --git a/src/pokey/protocol_key.c b/src/pokey/protocol_key.c deleted file mode 100644 index 6ccf3664..00000000 --- a/src/pokey/protocol_key.c +++ /dev/null @@ -1,285 +0,0 @@ -/* - protocol_key.c -- handle the meta-protocol, key exchange - Copyright (C) 1999-2002 Ivo Timmermans , - 2000-2002 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 - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - 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 2002/04/28 12:46:26 zarq Exp $ -*/ - -#include "config.h" - -#include -#include -#include -#include -#include - -#include -#include -#include - -#include "conf.h" -#include "interface.h" -#include "net.h" -#include "netutl.h" -#include "protocol.h" -#include "meta.h" -#include "connection.h" -#include "node.h" -#include "edge.h" -#include "logging.h" - -#include "system.h" - -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; -} - -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; -} - -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); -} - -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); - } - -cp - return 0; -} - -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); -} - -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; - } - 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; - } - 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; - } - } - else - { - from->digest = NULL; - } - - from->compression = compression; -cp - return 0; -}