fix: Update minimum required version of cryptography in pyopenssl extra

README.rst

@@ -22,6 +22,17 @@ For more information on setting up your Python development environment, please r
 
 .. _`Python Development Environment Setup Guide`: https://cloud.google.com/python/setup
 
+Extras
+------
+
+google-auth has few extras that you can install. For example::
+
+ $ pip install google-auth[pyopenssl]
+
+Note that the extras pyopenssl and enterprise_cert should not be used together because they use conflicting versions of `cryptography`_.
+
+.. _`cryptography`: https://cryptography.io/en/latest/
+
 Supported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 Python >= 3.6

setup.py

@@ -36,7 +36,7 @@
  "aiohttp >= 3.6.2, < 4.0.0dev; python_version>='3.6'",
  "requests >= 2.20.0, < 3.0.0dev",
  ],
- "pyopenssl": "pyopenssl>=20.0.0",
+ "pyopenssl": ["pyopenssl>=20.0.0", "cryptography>=38.0.3"],
  "reauth": "pyu2f>=0.1.5",
  # Enterprise cert only works for OpenSSL 1.1.1. Newer versions of these
  # dependencies are built with OpenSSL 3.0 so we need to fix the version.