1 files changed, 7 insertions, 1 deletions
diff --git a/cryptography/hazmat/bindings/openssl/backend.py b/cryptography/hazmat/bindings/openssl/backend.py
index f9bef1a5..3702dcae 100644
--- a/cryptography/hazmat/bindings/openssl/backend.py
+++ b/cryptography/hazmat/bindings/openssl/backend.py
@@ -20,7 +20,7 @@ import cffi
 
 from cryptography.hazmat.primitives import interfaces
 from cryptography.hazmat.primitives.block.ciphers import (
-    AES, Blowfish, Camellia, TripleDES,
+    AES, Blowfish, Camellia, CAST5, TripleDES,
 )
 from cryptography.hazmat.primitives.block.modes import CBC, CTR, ECB, OFB, CFB
 
@@ -227,6 +227,12 @@ class Ciphers(object):
                 mode_cls,
                 GetCipherByName("bf-{mode.name}")
             )
+        for mode_cls in [CBC, CFB, OFB, ECB]:
+            self.register_cipher_adapter(
+                CAST5,
+                mode_cls,
+                GetCipherByName("cast5-{mode.name}")
+            )
 
     def create_encrypt_ctx(self, cipher, mode):
         return _CipherContext(self._backend, cipher, mode,