Add command for generating encryption keys (#208)

CHANGELOG.md

@@ -20,6 +20,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 - Added support for custom encryption providers.
 - Added support for data encryption with [defuse/php-encryption](https://github.com/defuse/php-encryption).
 - Added ability to configure which crypto provider should be used. Current available options are `mcrypt` (not recommended since it will be removed in PHP 7.2) and `defuse_php_encryption`.
+- Added console command to generate an encryption key for use with `defuse_php_encryption`.
 
 ### Removed
 - Removed support for PHP 5.3. If you're still using PHP 5.3, please consider upgrading since it reached End Of Life in August 2014. Otherwise, use `1.2.*`.

Command/GenerateKeyCommand.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace JMS\Payment\CoreBundle\Command;
+
+use Defuse\Crypto\Key;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class GenerateKeyCommand extends Command
+{
+    protected function configure()
+    {
+        $this
+            ->setName('jms_payment_core:generate-key')
+            ->setDescription('Generate an encryption key')
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $output->writeln(Key::createNewRandomKey()->saveToAsciiSafeString());
+    }
+}

Resources/doc/setup.rst

@@ -31,10 +31,7 @@ You can generate the secret with the following command:
 
 .. code-block :: bash
 
-    php -r '
-        require "vendor/autoload.php";
-        echo (\Defuse\Crypto\Key::createNewRandomKey())->saveToAsciiSafeString()."\n";
-    '
+    bin/console jms_payment_core:generate-key
 
 And then use it in your configuration:
 

Tests/Functional/Command/GenerateKeyCommandTest.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace JMS\Payment\CoreBundle\Tests\Command;
+
+use JMS\Payment\CoreBundle\Command\GenerateKeyCommand;
+use JMS\Payment\CoreBundle\Cryptography\DefusePhpEncryptionService;
+use JMS\Payment\CoreBundle\Tests\Functional\BaseTestCase;
+use Symfony\Bundle\FrameworkBundle\Console\Application;
+use Symfony\Component\Console\Tester\CommandTester;
+
+class GenerateKeyCommandTest extends BaseTestCase
+{
+    public function setUp()
+    {
+        self::createKernel();
+
+        $application = new Application(self::$kernel);
+        $application->add(new GenerateKeyCommand());
+
+        $this->command = $application->find('jms_payment_core:generate-key');
+
+        parent::setUp();
+    }
+
+    /**
+     * @runInSeparateProcess
+     */
+    public function testGeneration()
+    {
+        $key = trim($this->execute(array()));
+
+        $cipher = new DefusePhpEncryptionService($key);
+
+        $this->assertNotEmpty($key);
+        $this->assertEquals('foo', $cipher->decrypt($cipher->encrypt('foo')));
+    }
+
+    private function execute(array $input)
+    {
+        $commandTester = new CommandTester($this->command);
+
+        $commandTester->execute(array_merge(array(
+            'command' => $this->command->getName(),
+        ), $input));
+
+        return $commandTester->getDisplay();
+    }
+}