Gem::Commands::CertCommand#sign

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/commands/cert_command.rb, line 292
def sign(cert_file)
  cert = File.read cert_file
  cert = OpenSSL::X509::Certificate.new cert

  permissions = File.stat(cert_file).mode & 0o777

  issuer_cert = options[:issuer_cert]
  issuer_key = options[:key]

  cert = Gem::Security.sign cert, issuer_key, issuer_cert

  Gem::Security.write_certificate cert, cert_file, permissions
end