1 files changed, 17 insertions, 0 deletions
diff --git a/src/cryptography/x509/extensions.py b/src/cryptography/x509/extensions.py
index 8880f744..9d6b3e79 100644
--- a/src/cryptography/x509/extensions.py
+++ b/src/cryptography/x509/extensions.py
@@ -597,6 +597,9 @@ class CertificatePolicies(object):
     def __getitem__(self, idx):
         return self._policies[idx]
 
+    def __hash__(self):
+        return hash(tuple(self._policies))
+
 
 class PolicyInformation(object):
     def __init__(self, policy_identifier, policy_qualifiers):
@@ -636,6 +639,14 @@ class PolicyInformation(object):
     def __ne__(self, other):
         return not self == other
 
+    def __hash__(self):
+        if self.policy_qualifiers is not None:
+            pq = tuple(self.policy_qualifiers)
+        else:
+            pq = None
+
+        return hash((self.policy_identifier, pq))
+
     policy_identifier = utils.read_only_property("_policy_identifier")
     policy_qualifiers = utils.read_only_property("_policy_qualifiers")
 
@@ -670,6 +681,9 @@ class UserNotice(object):
     def __ne__(self, other):
         return not self == other
 
+    def __hash__(self):
+        return hash((self.notice_reference, self.explicit_text))
+
     notice_reference = utils.read_only_property("_notice_reference")
     explicit_text = utils.read_only_property("_explicit_text")
 
@@ -703,6 +717,9 @@ class NoticeReference(object):
     def __ne__(self, other):
         return not self == other
 
+    def __hash__(self):
+        return hash((self.organization, tuple(self.notice_numbers)))
+
     organization = utils.read_only_property("_organization")
     notice_numbers = utils.read_only_property("_notice_numbers")