DependencyInjection/Source/EncrypterSource.php
public function getNodeDefinition(ArrayNodeDefinition $node)
    {
        $node
            ->children()
                ->arrayNode($this->getName())
                    ->useAttributeAsKey('name')
                    ->prototype('array')
                        ->children()
                        ->booleanNode('is_public')
                            ->info('If true, the service will be public, else private.')
                            ->defaultTrue()
                        ->end()
                            ->arrayNode('key_encryption_algorithms')
                                ->useAttributeAsKey('name')
                                ->isRequired()
                                ->prototype('scalar')->end()
                            ->end()
                            ->arrayNode('content_encryption_algorithms')
                                ->useAttributeAsKey('name')
                                ->isRequired()
                                ->prototype('scalar')->end()
                            ->end()
                            ->arrayNode('compression_methods')
                                ->useAttributeAsKey('name')
                                ->defaultValue(['DEF'])
                                ->prototype('scalar')->end()
                            ->end()
                            ->booleanNode('create_decrypter')
                                ->defaultFalse()
                            ->end()
                        ->end()
                    ->end()
                ->end()
            ->end();
    }
public function getNodeDefinition(ArrayNodeDefinition $node)
    {
        $node
            ->children()
                ->arrayNode($this->getName())
                    ->useAttributeAsKey('name')
                    ->prototype('array')
                        ->children()
                        ->booleanNode('is_public')
                            ->info('If true, the service will be public, else private.')
                            ->defaultTrue()
                        ->end()
                            ->arrayNode('key_encryption_algorithms')
                                ->useAttributeAsKey('name')
                                ->isRequired()
                                ->prototype('scalar')->end()
                            ->end()
                            ->arrayNode('content_encryption_algorithms')
                                ->useAttributeAsKey('name')
                                ->isRequired()
                                ->prototype('scalar')->end()
                            ->end()
                            ->arrayNode('compression_methods')
                                ->useAttributeAsKey('name')
                                ->defaultValue(['DEF'])
                                ->prototype('scalar')->end()
                            ->end()
                            ->booleanNode('create_decrypter')
                                ->defaultFalse()
                            ->end()
                        ->end()
                    ->end()
                ->end()
            ->end();
    }
{@inheritdoc}