fix: remove checks for ancient versions of Cryptography (#596)
Refs https://github.com/googleapis/google-auth-library-python/issues/595#issuecomment-683903062
I see no point in checking whether someone is running a version of https://github.com/pyca/cryptography/ from 2014 that doesn't even compile against modern versions of OpenSSL anymore.
diff --git a/google/auth/crypt/_cryptography_rsa.py b/google/auth/crypt/_cryptography_rsa.py
index e94bc68..916c9d8 100644
--- a/google/auth/crypt/_cryptography_rsa.py
+++ b/google/auth/crypt/_cryptography_rsa.py
@@ -25,23 +25,10 @@
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric import padding
import cryptography.x509
-import pkg_resources
from google.auth import _helpers
from google.auth.crypt import base
-_IMPORT_ERROR_MSG = (
- "cryptography>=1.4.0 is required to use cryptography-based RSA " "implementation."
-)
-
-try: # pragma: NO COVER
- release = pkg_resources.get_distribution("cryptography").parsed_version
- if release < pkg_resources.parse_version("1.4.0"):
- raise ImportError(_IMPORT_ERROR_MSG)
-except pkg_resources.DistributionNotFound: # pragma: NO COVER
- raise ImportError(_IMPORT_ERROR_MSG)
-
-
_CERTIFICATE_MARKER = b"-----BEGIN CERTIFICATE-----"
_BACKEND = backends.default_backend()
_PADDING = padding.PKCS1v15()
diff --git a/google/auth/crypt/es256.py b/google/auth/crypt/es256.py
index 6955efc..c6d6176 100644
--- a/google/auth/crypt/es256.py
+++ b/google/auth/crypt/es256.py
@@ -25,22 +25,10 @@
from cryptography.hazmat.primitives.asymmetric.utils import decode_dss_signature
from cryptography.hazmat.primitives.asymmetric.utils import encode_dss_signature
import cryptography.x509
-import pkg_resources
from google.auth import _helpers
from google.auth.crypt import base
-_IMPORT_ERROR_MSG = (
- "cryptography>=1.4.0 is required to use cryptography-based ECDSA " "algorithms"
-)
-
-try: # pragma: NO COVER
- release = pkg_resources.get_distribution("cryptography").parsed_version
- if release < pkg_resources.parse_version("1.4.0"):
- raise ImportError(_IMPORT_ERROR_MSG)
-except pkg_resources.DistributionNotFound: # pragma: NO COVER
- raise ImportError(_IMPORT_ERROR_MSG)
-
_CERTIFICATE_MARKER = b"-----BEGIN CERTIFICATE-----"
_BACKEND = backends.default_backend()