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-rw-r--r--src/cryptography/hazmat/backends/openssl/backend.py21
1 files changed, 11 insertions, 10 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index 38fe0772..e8b0322e 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -1453,16 +1453,17 @@ class Backend(object):
if not isinstance(algorithm, hashes.HashAlgorithm):
raise TypeError('Algorithm must be a registered hash algorithm.')
- if isinstance(private_key, _DSAPrivateKey):
- raise NotImplementedError(
- "CRL signatures aren't implemented for DSA"
- " keys at this time."
- )
- if isinstance(private_key, _EllipticCurvePrivateKey):
- raise NotImplementedError(
- "CRL signatures aren't implemented for EC"
- " keys at this time."
- )
+ if self._lib.OPENSSL_VERSION_NUMBER <= 0x10001000:
+ if isinstance(private_key, _DSAPrivateKey):
+ raise NotImplementedError(
+ "CRL signatures aren't implemented for DSA"
+ " keys on OpenSSL versions less than 1.0.1."
+ )
+ if isinstance(private_key, _EllipticCurvePrivateKey):
+ raise NotImplementedError(
+ "CRL signatures aren't implemented for EC"
+ " keys on OpenSSL versions less than 1.0.1."
+ )
evp_md = self._lib.EVP_get_digestbyname(
algorithm.name.encode('ascii')