Make credential IDs random, so that it will be very unlikely that two

independently generated credentials will collide.

protogeni/lib/GeniCredential.pm.in

@@ -513,9 +513,11 @@ sub Sign($$)
     #
     # Create a template xml file to sign.
     #
+    my $id = sprintf( "%08X%08X", int( rand( 0x100000000 ) ),
+		      int( rand( 0x100000000 ) ) );
     my $template =
 	"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n".
-	"<credential xml:id=\"ref1\">\n".
+	"<credential xml:id=\"ref$id\">\n".
 	" <type>privilege</type>\n".
 	" <serial>$idx</serial>\n".
 	" <owner_gid>$owner_cert</owner_gid>\n".

protogeni/test/delegate.py

@@ -16,6 +16,7 @@
 import datetime
 import getopt
 import os
+import random
 import re
 import sys
 import tempfile
@@ -200,10 +201,13 @@ old = Lookup( doc.documentElement, "credential" )
 
 c = doc.createElement( "credential" )
 
-id = 1
-while filter( lambda x: x.getAttribute( "xml:id" ) == "ref" + str( id ),
-              doc.getElementsByTagName( "credential" ) ):    
-    id = id + 1
+# I really want do loops in Python...
+while True:
+    id = "ref" + '%016X' % random.getrandbits( 64 )
+    if not filter( lambda x: x.getAttribute( "xml:id" ) == "ref" + str( id ),
+                   doc.getElementsByTagName( "credential" ) ):
+        break
+
 c.setAttribute( "xml:id", "ref" + str( id ) )
 c.appendChild( Lookup( old, "type" ).cloneNode( True ) )