modified sighash to use hashlib versus hash. 'hash' produced different values for new IDA instances.

Author: hbitsoi

plugins/rizzo/rizzo.py

@@ -34,6 +34,7 @@
 import time
 import pickle       # http://natashenka.ca/pickle/
 import collections
+import hashlib
 
 from shims import ida_shims
 
@@ -163,7 +164,11 @@ def load(self):
         return sigs
 
     def sighash(self, value):
-        return hash(str(value)) & 0xFFFFFFFF
+        h = hashlib.md5()
+        h.update(value.encode("utf-8"))
+        hash_value = h.hexdigest()
+        del(h)
+        return hash_value
 
     def block(self, block):
         '''
@@ -340,7 +345,6 @@ def match(self, extsigs):
         strings = {}
         immediates = {}
 
-
         # Match formal function signatures
         start = time.time()
         for (extsig, ext_func_ea) in extsigs.formal.items():