- djm@cvs.openbsd.org 2004/06/13 12:53:24

     [dh.c dh.h kex.c kex.h kexdhc.c kexdhs.c monitor.c myproposal.h]
     [ssh-keyscan.c sshconnect2.c sshd.c]
     implement diffie-hellman-group14-sha1 kex method (trivial extension to
     existing diffie-hellman-group1-sha1); ok markus@

1 files changed, 24 insertions, 4 deletions

diff --git a/dh.c b/dh.c
index afd1e05d0..176fb7469 100644
--- a/dh.c
+++ b/dh.c
@@ -23,7 +23,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: dh.c,v 1.29 2004/02/27 22:49:27 dtucker Exp $");
+RCSID("$OpenBSD: dh.c,v 1.30 2004/06/13 12:53:24 djm Exp $");
 
 #include "xmalloc.h"
 
@@ -115,8 +115,9 @@ choose_dh(int min, int wantbits, int max)
 
         if ((f = fopen(_PATH_DH_MODULI, "r")) == NULL &&
             (f = fopen(_PATH_DH_PRIMES, "r")) == NULL) {
-                logit("WARNING: %s does not exist, using old modulus", _PATH_DH_MODULI);
-                return (dh_new_group1());
+                logit("WARNING: %s does not exist, using fixed modulus",
+                    _PATH_DH_MODULI);
+                return (dh_new_group14());
         }
 
         linenum = 0;
@@ -169,7 +170,7 @@ choose_dh(int min, int wantbits, int max)
         return (dh_new_group(dhg.g, dhg.p));
 }
 
-/* diffie-hellman-group1-sha1 */
+/* diffie-hellman-groupN-sha1 */
 
 int
 dh_pub_is_valid(DH *dh, BIGNUM *dh_pub)
@@ -272,6 +273,25 @@ dh_new_group1(void)
         return (dh_new_group_asc(gen, group1));
 }
 
+DH *
+dh_new_group14(void)
+{
+        static char *gen = "2", *group14 =
+            "FFFFFFFF" "FFFFFFFF" "C90FDAA2" "2168C234" "C4C6628B" "80DC1CD1"
+            "29024E08" "8A67CC74" "020BBEA6" "3B139B22" "514A0879" "8E3404DD"
+            "EF9519B3" "CD3A431B" "302B0A6D" "F25F1437" "4FE1356D" "6D51C245"
+            "E485B576" "625E7EC6" "F44C42E9" "A637ED6B" "0BFF5CB6" "F406B7ED"
+            "EE386BFB" "5A899FA5" "AE9F2411" "7C4B1FE6" "49286651" "ECE45B3D"
+            "C2007CB8" "A163BF05" "98DA4836" "1C55D39A" "69163FA8" "FD24CF5F"
+            "83655D23" "DCA3AD96" "1C62F356" "208552BB" "9ED52907" "7096966D"
+            "670C354E" "4ABC9804" "F1746C08" "CA18217C" "32905E46" "2E36CE3B"
+            "E39E772C" "180E8603" "9B2783A2" "EC07A28F" "B5C55DF0" "6F4C52C9"
+            "DE2BCBF6" "95581718" "3995497C" "EA956AE5" "15D22618" "98FA0510"
+            "15728E5A" "8AACAA68" "FFFFFFFF" "FFFFFFFF";
+
+        return (dh_new_group_asc(gen, group14));
+}
+
 /*
  * Estimates the group order for a Diffie-Hellman group that has an
  * attack complexity approximately the same as O(2**bits).  Estimate