The current version of the gem does not seem to be compatible with OpenSSL 3.0. The problem seems to be that pkeys are immutable in OpenSSL 3.

Environment details

• OS: Ubuntu Jammy Jellyfish (development branch), running on WSL 2
• Ruby version: 3.1.1 (built against OpenSSL 3.0)
• Gem name and version: google-auth-library-ruby (main Branch)

Steps to reproduce

1. Make sure that ruby -e 'require "openssl"; p OpenSSL::::OPENSSL_VERSION' report version 3.0.0
2. Run the tests using toys do test
3. Errors that occur:

• OpenSSL::PKey::PKeyError: rsa#set_key= is incompatible with OpenSSL 3.0
• OpenSSL::PKey::PKeyError: pkeys are immutable on OpenSSL 3.0