--- Decrypt.cc.jn	2002-12-06 00:44:32.000000000 +0100
+++ Decrypt.cc	2005-01-14 13:38:48.192647128 +0100
@@ -132,13 +132,19 @@ GBool Decrypt::makeFileKey2(int encVersi
   Guchar *buf;
   Guchar test[32];
   Guchar fState[256];
-  Guchar tmpKey[16];
+  Guchar *tmpKey;
   Guchar fx, fy;
   int len, i, j;
   GBool ok;
 
+  // check whether we have non-zero keyLength
+  if ( !keyLength ) {
+    return gFalse;
+  }
+  
   // generate file key
   buf = (Guchar *)gmalloc(68 + fileID->getLength());
+  tmpKey = (Guchar *)gmalloc(keyLength * sizeof(Guchar));
   if (userPassword) {
     len = userPassword->getLength();
     if (len < 32) {
@@ -191,6 +197,7 @@ GBool Decrypt::makeFileKey2(int encVersi
     ok = gFalse;
   }
 
+  gfree(tmpKey);
   gfree(buf);
   return ok;
 }