X-Git-Url: http://git.silcnet.org/gitweb/?p=silc.git;a=blobdiff_plain;f=lib%2Fsilccore%2Fsilcauth.c;h=38a1a961392e87fe668cd7110f48dc0418990780;hp=7cb173ecc702c94ed760c659b04aeb8edf4607d2;hb=382d15d447b7a95390decfa783836ae4fe255b3d;hpb=8c94186e5b81937b67ce0862c1f3e2cb1f484719

diff --git a/lib/silccore/silcauth.c b/lib/silccore/silcauth.c
index 7cb173ec..38a1a961 100644
--- a/lib/silccore/silcauth.c
+++ b/lib/silccore/silcauth.c
@@ -1,6 +1,6 @@
 /*
 
-  silcauth.c
+  silcauth.c 
 
   Author: Pekka Riikonen <priikone@silcnet.org>
 
@@ -8,8 +8,7 @@
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
-  (at your option) any later version.
+  the Free Software Foundation; version 2 of the License.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -186,7 +185,7 @@ unsigned char *silc_auth_get_data(SilcAuthPayload payload,
 
 static unsigned char *
 silc_auth_public_key_encode_data(SilcPublicKey public_key,
-				 const unsigned char *random,
+				 const unsigned char *randomdata,
 				 SilcUInt32 random_len, const void *id,
 				 SilcIdType type, SilcUInt32 *ret_len)
 {
@@ -212,7 +211,7 @@ silc_auth_public_key_encode_data(SilcPublicKey public_key,
     return NULL;
   }
   silc_buffer_format(buf,
-		     SILC_STR_UI_XNSTRING(random, random_len),
+		     SILC_STR_UI_XNSTRING(randomdata, random_len),
 		     SILC_STR_UI_XNSTRING(id_data, id_len),
 		     SILC_STR_UI_XNSTRING(pk, pk_len),
 		     SILC_STR_END);
@@ -224,6 +223,7 @@ silc_auth_public_key_encode_data(SilcPublicKey public_key,
   if (ret_len)
     *ret_len = buf->len;
 
+  silc_buffer_clear(buf);
   silc_buffer_free(buf);
   silc_free(id_data);
   silc_free(pk);
@@ -240,8 +240,8 @@ SilcBuffer silc_auth_public_key_auth_generate(SilcPublicKey public_key,
 					      SilcRng rng, SilcHash hash,
 					      const void *id, SilcIdType type)
 {
-  unsigned char *random;
-  unsigned char auth_data[1024];
+  unsigned char *randomdata;
+  unsigned char auth_data[2048 + 1];
   SilcUInt32 auth_len;
   unsigned char *tmp;
   SilcUInt32 tmp_len;
@@ -252,20 +252,20 @@ SilcBuffer silc_auth_public_key_auth_generate(SilcPublicKey public_key,
 
   /* Get 256 bytes of random data */
   if (rng)
-    random = silc_rng_get_rn_data(rng, 256);
+    randomdata = silc_rng_get_rn_data(rng, 256);
   else
-    random = silc_rng_global_get_rn_data(256);
-  if (!random)
+    randomdata = silc_rng_global_get_rn_data(256);
+  if (!randomdata)
     return NULL;
 
   /* Encode the auth data */
-  tmp = silc_auth_public_key_encode_data(public_key, random, 256, id, type,
-					 &tmp_len);
+  tmp = silc_auth_public_key_encode_data(public_key, randomdata, 256, id, 
+					 type, &tmp_len);
   if (!tmp)
     return NULL;
 
   /* Allocate PKCS object */
-  if (!silc_pkcs_alloc(public_key->name, &pkcs)) {
+  if (!silc_pkcs_alloc(private_key->name, &pkcs)) {
     memset(tmp, 0, tmp_len);
     silc_free(tmp);
     return NULL;
@@ -274,25 +274,26 @@ SilcBuffer silc_auth_public_key_auth_generate(SilcPublicKey public_key,
   silc_pkcs_private_key_set(pkcs, private_key);
 
   /* Compute the hash and the signature. */
-  if (!silc_pkcs_sign_with_hash(pkcs, hash, tmp, tmp_len, auth_data,
+  if (silc_pkcs_get_key_len(pkcs) / 8 > sizeof(auth_data) - 1 ||
+      !silc_pkcs_sign_with_hash(pkcs, hash, tmp, tmp_len, auth_data,
 				&auth_len)) {
-    memset(random, 0, 256);
+    memset(randomdata, 0, 256);
     memset(tmp, 0, tmp_len);
     silc_free(tmp);
-    silc_free(random);
+    silc_free(randomdata);
     silc_pkcs_free(pkcs);
     return NULL;
   }
 
   /* Encode Authentication Payload */
-  buf = silc_auth_payload_encode(SILC_AUTH_PUBLIC_KEY, random, 256,
+  buf = silc_auth_payload_encode(SILC_AUTH_PUBLIC_KEY, randomdata, 256,
 				 auth_data, auth_len);
 
   memset(tmp, 0, tmp_len);
   memset(auth_data, 0, sizeof(auth_data));
-  memset(random, 0, 256);
+  memset(randomdata, 0, 256);
   silc_free(tmp);
-  silc_free(random);
+  silc_free(randomdata);
   silc_pkcs_free(pkcs);
 
   return buf;