[or-cvs] Backport: discard special bignum values

[Nick Mathewson]

Update of /home/or/cvsroot/tor/src/common
In directory moria:/tmp/cvs-serv6011/src/common

Modified Files:
      Tag: tor-0_1_0-patches
	crypto.c 
Log Message:
Backport: discard special bignum values

Index: crypto.c
===================================================================
RCS file: /home/or/cvsroot/tor/src/common/crypto.c,v
retrieving revision 1.137.2.4
retrieving revision 1.137.2.5
diff -u -d -r1.137.2.4 -r1.137.2.5
--- crypto.c	4 Aug 2005 23:19:23 -0000	1.137.2.4
+++ crypto.c	5 Aug 2005 19:01:04 -0000	1.137.2.5
@@ -1379,6 +1379,10 @@
     log_fn(LOG_WARN, "bn<0");
     return -1;
   }
+  if (BN_cmp(bn,dh_param_p)>=0) {
+    log_fn(LOG_WARN, "bn>=p");
+    return -1;
+  }
   for (i=0; i < N_XX_GX; ++i) {
     if (!BN_cmp(bn, dh_gx_xx[i])) {
       char *which = BN_bn2hex(dh_gx_xx[i]);