[PATCH][ACM] Add type check and conversion to get_decision

["Bryan D. Payne" <bdpayne@us.ibm.com>]

This patch allows domid and ssidref args to get_decision in 
util/security.py to be either strings or ints (previously only strings 
would work due to the underlying call to lowlevel.acm).

Signed-off-by: Bryan D. Payne <bdpayne@us.ibm.com>
Signed-off-by: Reiner Sailer <sailer@us.ibm.com>
---
tools/python/xen/util/security.py |    9 +++++++++
1 file changed, 9 insertions(+)

Index: xen-unstable.hg-shype/tools/python/xen/util/security.py
===================================================================
--- xen-unstable.hg-shype.orig/tools/python/xen/util/security.py
+++ xen-unstable.hg-shype/tools/python/xen/util/security.py
@@ -429,6 +429,15 @@ def get_decision(arg1, arg2):
             err("Argument type not supported.")
         ssidref = label2ssidref(arg2[2][1], arg2[1][1])
         arg2 = ['ssidref', str(ssidref)]
+
+    # accept only int or string types for domid and ssidref
+    if isinstance(arg1[1], int):
+        arg1[1] = str(arg1[1])
+    if isinstance(arg2[1], int):
+        arg2[1] = str(arg2[1])
+    if not isinstance(arg1[1], str) or not isinstance(arg2[1], str):
+        err("Invalid id or ssidref type, string or int required")
+
     try:
         decision = acm.getdecision(arg1[0], arg1[1], arg2[0], arg2[1])
     except: