Gem::Commands::CertCommand#load_default_key

# File tmp/rubies/ruby-4.0.0/lib/rubygems/commands/cert_command.rb, line 261
def load_default_key
  key_file = File.join Gem.default_key_path
  key = File.read key_file
  passphrase = ENV["GEM_PRIVATE_KEY_PASSPHRASE"]
  options[:key] = OpenSSL::PKey.read key, passphrase
rescue Errno::ENOENT
  alert_error \
    "--private-key not specified and ~/.gem/gem-private_key.pem does not exist"

  terminate_interaction 1
rescue OpenSSL::PKey::PKeyError
  alert_error \
    "--private-key not specified and ~/.gem/gem-private_key.pem is not valid"

  terminate_interaction 1
end