j3d1/tinc
1
0
Fork 0
Code Issues 1 Pull requests Releases Wiki Activity

Fix pointer arithmetic when creating and verifying message authentication codes.

Browse source
This commit is contained in:
Guus Sliepen 2009-06-06 20:14:51 +02:00
parent 4124b9682f
commit 9b129c07e2
1 changed files with 3 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
src/net_packet.c
View file

@ -166,7 +166,7 @@ static bool try_mac(node_t *n, const vpn_packet_t *inpkt)
if(!digest_active(&n->indigest) || inpkt->len < sizeof inpkt->seqno + digest_length(&n->indigest))
return false;
return digest_verify(&n->indigest, &inpkt->seqno, inpkt->len, &inpkt->seqno + inpkt->len);
return digest_verify(&n->indigest, &inpkt->seqno, inpkt->len, (const char *)&inpkt->seqno + inpkt->len);
}
static void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
@ -196,7 +196,7 @@ static void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
/* Check the message authentication code */
if(digest_active(&n->indigest) && !digest_verify(&n->indigest, &inpkt->seqno, inpkt->len, &inpkt->seqno + inpkt->len)) {
if(digest_active(&n->indigest) && !digest_verify(&n->indigest, &inpkt->seqno, inpkt->len, (const char *)&inpkt->seqno + inpkt->len)) {
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Got unauthenticated packet from %s (%s)"), n->name, n->hostname);
return;
}
@ -369,7 +369,7 @@ static void send_udppacket(node_t *n, vpn_packet_t *origpkt) {
/* Add the message authentication code */
if(digest_active(&n->outdigest)) {
digest_create(&n->outdigest, &inpkt->seqno, inpkt->len, &inpkt->seqno + inpkt->len);
digest_create(&n->outdigest, &inpkt->seqno, inpkt->len, (char *)&inpkt->seqno + inpkt->len);
inpkt->len += digest_length(&n->outdigest);
}