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Add randomness to PING/PONG packets to prevent crypto attacks on quiet

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tunnels.
This commit is contained in:
Guus Sliepen 2001-05-24 21:29:09 +00:00
parent 4493b0650b
commit d1b597758e
1 changed files with 10 additions and 3 deletions
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13
src/protocol.c
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@ -17,7 +17,7 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: protocol.c,v 1.28.4.87 2001/05/07 19:08:46 guus Exp $
$Id: protocol.c,v 1.28.4.88 2001/05/24 21:29:09 guus Exp $
*/
#include "config.h"
@ -1060,11 +1060,14 @@ cp
int send_ping(connection_t *cl)
{
char salt[SALTLEN*2+1];
cp
cl->status.pinged = 1;
cl->last_ping_time = time(NULL);
RAND_bytes(salt, SALTLEN);
bin2hex(salt, salt, SALTLEN);
cp
return send_request(cl, "%d", PING);
return send_request(cl, "%d %s", PING, salt);
}
int ping_h(connection_t *cl)
@ -1075,8 +1078,12 @@ cp
int send_pong(connection_t *cl)
{
char salt[SALTLEN*2+1];
cp
return send_request(cl, "%d", PONG);
RAND_bytes(salt, SALTLEN);
bin2hex(salt, salt, SALTLEN);
cp
return send_request(cl, "%d %s", PONG, salt);
}
int pong_h(connection_t *cl)