Add example certificate from showing macOS 12 ARM64 error

From @TheEnbyperor in #67

tests/fixtures/macos_12_public_key_export_issue.crt

@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
+

tests/test_asymmetric.py

@@ -629,3 +629,9 @@ def test_ec_private_key_unwrap(self):
  def test_ec_public_key_unwrap(self):
  public = asymmetric.load_public_key(os.path.join(fixtures_dir, 'keys/test-ec-named.crt'))
  self.assertIsInstance(public.unwrap(), keys.ECPointBitString)
+
+ def test_macos_public_key_export_issue(self):
+ # This was failing on Apple Silicon Macs with macOS 12+
+ cert = asymmetric.load_certificate(os.path.join(fixtures_dir, 'macos_12_public_key_export_issue.crt'))
+ public = cert.public_key
+ self.assertEqual('rsa', public.asn1.algorithm)