- Some key exchange stuff. (Last commit before going to bed.)
This commit is contained in:
Guus Sliepen
parent
675ed08a71
commit
76b5f255c6
1 changed files with 24 additions and 153 deletions
177
src/protocol.c
177
src/protocol.c
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@ -17,7 +17,7 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: protocol.c,v 1.28.4.27 2000/09/10 22:49:46 guus Exp $
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$Id: protocol.c,v 1.28.4.28 2000/09/10 23:11:37 guus Exp $
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*/
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#include "config.h"
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@ -674,9 +674,11 @@ cp
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if(!(from = lookup_id(from_id)))
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{
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syslog(LOG_ERR, _("Got KEY_CHANGED from %s (%s) origin %s which does not exist in our connection list"), cl->id, cl->hostname, from_id);
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free(from);
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free(from_id);
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return -1;
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}
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free(from_id);
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from->status.validkey = 0;
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from->status.waitingforkey = 0;
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@ -706,7 +708,7 @@ cp
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if(!(from = lookup_id(from_id)))
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{
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syslog(LOG_ERR, _("Got REQ_KEY from %s (%s) origin %s which does not exist in our connection list"), cl->id, cl->hostname, from_id);
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free(from); free(to);
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free(from_id); free(to_id);
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return -1;
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}
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@ -721,13 +723,13 @@ cp
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if(!(to = lookup_id(to_id)))
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{
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syslog(LOG_ERR, _("Got REQ_KEY from %s (%s) destination %s which does not exist in our connection list"), cl->id, cl->hostname, to_id);
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free(from); free(to);
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free(from_id); free(to_id);
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return -1;
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}
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send_req_key(from, to);
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}
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free(from); free(to);
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free(from_id); free(to_id);
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cp
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return 0;
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}
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@ -741,6 +743,7 @@ cp
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int ans_key_h(conn_list_t *cl)
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{
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char *from_id, *to_id, *datakey;
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int keylength;
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conn_list_t *from, *to;
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cp
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if(sscanf(cl->buffer, "%*d %as %as %as", &from_id, &to_id, &datakey) != 3)
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@ -752,7 +755,7 @@ cp
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if(!(from = lookup_id(from_id)))
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{
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syslog(LOG_ERR, _("Got ANS_KEY from %s (%s) origin %s which does not exist in our connection list"), cl->id, cl->hostname, from_id);
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free(from); free(to); free(datakey);
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free(from_id); free(to_id); free(datakey);
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return -1;
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}
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@ -760,56 +763,38 @@ cp
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if(!strcmp(id, myself->strcmp))
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{
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send_ans_key(myself, from);
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/* It is for us, convert it to binary and set the key with it. */
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keylength = strlen(datakey);
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if((keylength%1) || (keylength <= 0))
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{
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syslog(LOG_ERR, _("Got bad ANS_KEY from %s (%s) origin %s: invalid key"), cl->id, cl->hostname, from->id);
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free(from_id); free(to_id); free(datakey);
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return -1;
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}
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keylength /= 2;
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hex2bin(datakey, datakey, keylength);
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BF_set_key(cl->datakey, keylength, datakey);
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}
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else
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{
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if(!(to = lookup_id(to_id)))
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{
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syslog(LOG_ERR, _("Got ANS_KEY from %s (%s) destination %s which does not exist in our connection list"), cl->id, cl->hostname, to_id);
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free(from); free(to); free(datakey);
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free(from_id); free(to_id); free(datakey);
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return -1;
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}
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send_ans_key(from, to, datakey);
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}
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free(from); free(to); free(datakey);
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free(from_id); free(to_id); free(datakey);
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cp
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return 0;
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}
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/* Old routines */
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int send_tcppacket(conn_list_t *cl, void *data, int len)
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{
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cp
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if(debug_lvl > 3)
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syslog(LOG_DEBUG, _("Sending PACKET to %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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buflen = snprintf(buffer, MAXBUFSIZE, "%d %d\n", PACKET, len);
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if((write(cl->meta_socket, buffer, buflen)) < 0)
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{
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syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
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return -1;
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}
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if((write(cl->meta_socket, data, len)) < 0)
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{
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syslog(LOG_ERR, _("Send failed: %s:%d: %m"), __FILE__, __LINE__);
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return -1;
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}
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cp
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return 0;
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}
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/*
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Notify all my direct connections of a new host
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that was added to the vpn, with the exception
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@ -844,120 +829,6 @@ cp
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return 0;
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}
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/*
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The incoming request handlers
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*/
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int tcppacket_h(conn_list_t *cl)
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{
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int len;
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cp
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if(!cl->status.active)
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{
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syslog(LOG_ERR, _("Got unauthorized PACKET from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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if(sscanf(cl->buffer, "%*d %d", &len) != 1)
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{
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syslog(LOG_ERR, _("Got bad PACKET from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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if(len > MTU)
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{
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syslog(LOG_ERR, _("Got too big PACKET from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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if(debug_lvl > 3)
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syslog(LOG_DEBUG, _("Got PACKET length %d from %s (%s)"), len,
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cl->vpn_hostname, cl->real_hostname);
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cl->tcppacket=len;
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cp
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return 0;
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}
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void set_keys(conn_list_t *cl, int expiry, char *key)
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{
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char *ek;
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cp
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if(!cl->public_key)
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{
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cl->public_key = xmalloc(sizeof(*cl->key));
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cl->public_key->key = NULL;
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}
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if(cl->public_key->key)
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free(cl->public_key->key);
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cl->public_key->length = strlen(key);
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cl->public_key->expiry = expiry;
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cl->public_key->key = xmalloc(cl->public_key->length + 1);
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strcpy(cl->public_key->key, key);
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ek = make_shared_key(key);
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if(!cl->key)
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{
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cl->key = xmalloc(sizeof(*cl->key));
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cl->key->key = NULL;
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}
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if(cl->key->key)
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free(cl->key->key);
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cl->key->length = strlen(ek);
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cl->key->expiry = expiry;
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cl->key->key = xmalloc(cl->key->length + 1);
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strcpy(cl->key->key, ek);
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cp
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}
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int key_changed_h(conn_list_t *cl)
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{
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ip_t from;
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conn_list_t *ik;
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cp
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if(!cl->status.active)
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{
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syslog(LOG_ERR, _("Got unauthorized KEY_CHANGED from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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if(sscanf(cl->buffer, "%*d %lx", &from) != 1)
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{
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syslog(LOG_ERR, _("Got bad KEY_CHANGED from %s (%s)"),
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cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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ik = lookup_conn(from);
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if(!ik)
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{
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syslog(LOG_ERR, _("Got KEY_CHANGED origin %d.%d.%d.%d from %s (%s), which does not exist?"),
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IP_ADDR_V(from), cl->vpn_hostname, cl->real_hostname);
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return -1;
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}
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if(debug_lvl > 1)
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syslog(LOG_DEBUG, _("Got KEY_CHANGED origin %s from %s (%s)"),
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ik->vpn_hostname, cl->vpn_hostname, cl->real_hostname);
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ik->status.validkey = 0;
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ik->status.waitingforkey = 0;
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notify_others(ik, cl, send_key_changed);
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cp
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return 0;
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}
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/* "Complete overhaul". */
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int (*request_handlers[])(conn_list_t*) = {
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