2 files changed, 9 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/x509.py b/src/cryptography/hazmat/backends/openssl/x509.py
index 399e6a6e..d78c60fa 100644
--- a/src/cryptography/hazmat/backends/openssl/x509.py
+++ b/src/cryptography/hazmat/backends/openssl/x509.py
@@ -724,6 +724,9 @@ class _CertificateSigningRequest(object):
     def __ne__(self, other):
         return not self == other
 
+    def __hash__(self):
+        return hash(self.public_bytes(serialization.Encoding.DER))
+
     def public_key(self):
         pkey = self._backend._lib.X509_REQ_get_pubkey(self._x509_req)
         assert pkey != self._backend._ffi.NULL
diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index d9d6db4a..33c64168 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -1444,6 +1444,12 @@ class CertificateSigningRequest(object):
         """
 
     @abc.abstractmethod
+    def __hash__(self):
+        """
+        Computes a hash.
+        """
+
+    @abc.abstractmethod
     def public_key(self):
         """
         Returns the public key