Make it possible to compute SHA and MD5 sums from restricted code.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25615 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Utils.py

@@ -31,6 +31,8 @@ import os
 import re
 import string
 import time
+from md5 import new as md5_new
+from sha import new as sha_new
 
 from Globals import package_home
 from Globals import DevelopmentMode
@@ -39,6 +41,8 @@ from Acquisition import aq_inner
 from Acquisition import aq_parent
 from Acquisition import aq_self
 
+from AccessControl.SecurityInfo import allow_class
+
 from Products.CMFCore import utils
 from Products.CMFCore.Expression import Expression
 from Products.CMFCore.DirectoryView import registerDirectory
@@ -2726,3 +2730,35 @@ def sqlquote(x):
     raise TypeError, 'do not know how to handle type %s' % type(x)
   return x
 
+#####################################################
+# Hashing
+#####################################################
+
+class GenericSum:
+  def __init__(self, sum):
+    self.sum = sum
+
+  def digest(self):
+    return self.sum.digest()
+
+  def hexdigest(self):
+    return self.sum.hexdigest()
+
+  def update(self, data):
+    self.sum.update(data)
+
+  def copy(self):
+    return self.__class__(self.sum.copy())
+
+class md5(GenericSum):
+  def __init__(self, *args):
+    GenericSum.__init__(self, md5_new(*args))
+
+allow_class(md5)
+
+class sha(GenericSum):
+  def __init__(self, *args):
+    GenericSum.__init__(self, sha_new(*args))
+
+allow_class(sha)
+