Fixed #2120 -- added __hash__ to x509.Cert

2 files changed, 10 insertions, 0 deletions

diff --git a/src/cryptography/hazmat/backends/openssl/x509.py b/src/cryptography/hazmat/backends/openssl/x509.py
index 7bfeb2ce..5e42b8e4 100644
--- a/src/cryptography/hazmat/backends/openssl/x509.py
+++ b/src/cryptography/hazmat/backends/openssl/x509.py
@@ -226,6 +226,10 @@ class _Certificate(object):
     def __ne__(self, other):
         return not self == other
 
+    def __hash__(self):
+        # TODO: Using fingerprint() with SHA256 is way overkill.
+        return hash(self.fingerprint(hashes.SHA256()))
+
     def fingerprint(self, algorithm):
         h = hashes.Hash(algorithm, self._backend)
         bio = self._backend._create_mem_bio()
diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index afd28f20..8d28c35c 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -1324,6 +1324,12 @@ class Certificate(object):
         """
 
     @abc.abstractmethod
+    def __hash__(self):
+        """
+        Computes a hash.
+        """
+
+    @abc.abstractmethod
     def public_bytes(self, encoding):
         """
         Serializes the certificate to PEM or DER format.