SKE: support for simplified key exchange

[silc.git] / lib / silcske / groups.c

diff --git a/lib/silcske/groups.c b/lib/silcske/groups.c
index 7f55aced89703d774c4b43b2729de6213b3100f9..d5b3b128e1b2e7efeb51ff3bc9d3e315fdcc4f00 100644 (file)
--- a/lib/silcske/groups.c
+++ b/lib/silcske/groups.c
@@ -23,47 +23,47 @@
 
 /* Fixed and public Diffie Hellman Groups defined by the SKE
    protocol. These are equivalent to the OAKLEY Key Determination
-   protocol groups (taken from RFC 2412). */
+   protocol groups. */
 const struct SilcSKEDiffieHellmanGroupDefStruct silc_ske_groups[] =
 {
-  /* 1024 bits modulus (Mandatory group) */
-  { 1, "diffie-hellman-group1",
+  /* 1536 bits modulus (Optional group) (RFC 3526). */
+  { 2, "diffie-hellman-group2",
 
     "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
     "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
     "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
     "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
-    "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381"
-    "FFFFFFFFFFFFFFFF",
+    "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
+    "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
+    "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
+    "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF",
 
     "7FFFFFFFFFFFFFFFE487ED5110B4611A62633145C06E0E68"
     "948127044533E63A0105DF531D89CD9128A5043CC71A026E"
     "F7CA8CD9E69D218D98158536F92F8A1BA7F09AB6B6A8E122"
     "F242DABB312F3F637A262174D31BF6B585FFAE5B7A035BF6"
-    "F71C35FDAD44CFD2D74F9208BE258FF324943328F67329C0"
-    "FFFFFFFFFFFFFFFF",
+    "F71C35FDAD44CFD2D74F9208BE258FF324943328F6722D9E"
+    "E1003E5C50B1DF82CC6D241B0E2AE9CD348B1FD47E9267AF"
+    "C1B2AE91EE51D6CB0E3179AB1042A95DCF6A9483B84B4B36"
+    "B3861AA7255E4C0278BA36046511B993FFFFFFFFFFFFFFFF",
     "2" },
 
-  /* 1536 bits modulus (Optional group) */
-  { 2, "diffie-hellman-group2",
+  /* 1024 bits modulus (Mandatory group) (RFC 2412). */
+  { 1, "diffie-hellman-group1",
 
     "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
     "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
     "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
     "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
-    "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
-    "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
-    "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
-    "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF",
+    "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381"
+    "FFFFFFFFFFFFFFFF",
 
     "7FFFFFFFFFFFFFFFE487ED5110B4611A62633145C06E0E68"
     "948127044533E63A0105DF531D89CD9128A5043CC71A026E"
     "F7CA8CD9E69D218D98158536F92F8A1BA7F09AB6B6A8E122"
     "F242DABB312F3F637A262174D31BF6B585FFAE5B7A035BF6"
-    "F71C35FDAD44CFD2D74F9208BE258FF324943328F6722D9E"
-    "E1003E5C50B1DF82CC6D241B0E2AE9CD348B1FD47E9267AF"
-    "C1B2AE91EE51D6CB0E3179AB1042A95DCF6A9483B84B4B36"
-    "B3861AA7255E4C0278BA36046511B993FFFFFFFFFFFFFFFF",
+    "F71C35FDAD44CFD2D74F9208BE258FF324943328F67329C0"
+    "FFFFFFFFFFFFFFFF",
     "2" },
 
   { 0, NULL, NULL, NULL }
@@ -153,13 +153,16 @@ void silc_ske_group_free(SilcSKEDiffieHellmanGroup group)
 
 /* Returns comma separated list of supported groups */
 
-char *silc_ske_get_supported_groups()
+char *silc_ske_get_supported_groups(SilcUInt32 limit)
 {
   char *list = NULL;
   int i, len;
 
+  if (!limit)
+    limit = ~0;
+
   len = 0;
-  for (i = 0; silc_ske_groups[i].name; i++) {
+  for (i = 0; silc_ske_groups[i].name && i < limit; i++) {
     len += strlen(silc_ske_groups[i].name);
     list = silc_realloc(list, len + 1);
 
@@ -169,7 +172,8 @@ char *silc_ske_get_supported_groups()
     len++;
   }
 
-  list[len - 1] = 0;
+  if (list)
+    list[len - 1] = 0;
 
   return list;
 }