Fix test when GCM is not supported

Author: pitbulk

test/response_test.rb

@@ -1594,20 +1594,23 @@ def generate_audience_error(expected, actual)
         end
 
         it "EncryptionMethod AES-128-GCM && Key Encryption Algorithm RSA-OAEP-MGF1P" do
+          return unless OpenSSL::Cipher.ciphers.include? 'AES-128-GCM'
           unsigned_message_aes128gcm_encrypted_signed_assertion = read_response('unsigned_message_aes128gcm_encrypted_signed_assertion.xml.base64')
           response = OneLogin::RubySaml::Response.new(unsigned_message_aes128gcm_encrypted_signed_assertion, :settings => settings)
           assert_equal "test", response.attributes[:uid]
           assert_equal "_ce3d2948b4cf20146dee0a0b3dd6f69b6cf86f62d7", response.nameid
         end
 
         it "EncryptionMethod AES-192-GCM && Key Encryption Algorithm RSA-OAEP-MGF1P" do
+          return unless OpenSSL::Cipher.ciphers.include? 'AES-192-GCM'
           unsigned_message_aes192gcm_encrypted_signed_assertion = read_response('unsigned_message_aes192gcm_encrypted_signed_assertion.xml.base64')
           response = OneLogin::RubySaml::Response.new(unsigned_message_aes192gcm_encrypted_signed_assertion, :settings => settings)
           assert_equal "test", response.attributes[:uid]
           assert_equal "_ce3d2948b4cf20146dee0a0b3dd6f69b6cf86f62d7", response.nameid
         end
 
         it "EncryptionMethod AES-256-GCM && Key Encryption Algorithm RSA-OAEP-MGF1P" do
+          return unless OpenSSL::Cipher.ciphers.include? 'AES-256-GCM'
           unsigned_message_aes256gcm_encrypted_signed_assertion = read_response('unsigned_message_aes256gcm_encrypted_signed_assertion.xml.base64')
           response = OneLogin::RubySaml::Response.new(unsigned_message_aes256gcm_encrypted_signed_assertion, :settings => settings)
           assert_equal "test", response.attributes[:uid]