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-rw-r--r--src/cryptography/hazmat/backends/openssl/backend.py6
1 files changed, 2 insertions, 4 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index 13699558..59503bd9 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -1210,10 +1210,8 @@ class Backend(object):
elif (self._lib.Cryptography_HAS_EC == 1 and
type == self._lib.EVP_PKEY_EC):
write_bio = self._lib.i2d_ECPrivateKey_bio
- else:
- raise TypeError(
- "Only RSA & EC keys are supported for DER serialization"
- )
+ elif type == self._lib.EVP_PKEY_DSA:
+ write_bio = self._lib.i2d_DSAPrivateKey_bio
bio = self._create_mem_bio()
res = write_bio(bio, cdata)