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+<?php
+
+/*
+ * This file is part of the Acme PHP project.
+ *
+ * (c) Titouan Galopin <galopintitouan@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace AcmePhp\Ssl\Generator;
+
+use AcmePhp\Ssl\Exception\KeyGenerationException;
+use AcmePhp\Ssl\Exception\KeyPairGenerationException;
+use AcmePhp\Ssl\Generator\DhKey\DhKeyGenerator;
+use AcmePhp\Ssl\Generator\DsaKey\DsaKeyGenerator;
+use AcmePhp\Ssl\Generator\EcKey\EcKeyGenerator;
+use AcmePhp\Ssl\Generator\RsaKey\RsaKeyGenerator;
+use AcmePhp\Ssl\Generator\RsaKey\RsaKeyOption;
+use AcmePhp\Ssl\KeyPair;
+
+/**
+ * Generate random KeyPair using OpenSSL.
+ *
+ * @author Jérémy Derussé <jeremy@derusse.com>
+ */
+class KeyPairGenerator
+{
+    private $generator;
+
+    public function __construct(PrivateKeyGeneratorInterface $generator = null)
+    {
+        $this->generator = $generator ?: new ChainPrivateKeyGenerator(
+            [
+                new RsaKeyGenerator(),
+                new EcKeyGenerator(),
+                new DhKeyGenerator(),
+                new DsaKeyGenerator(),
+            ]
+        );
+    }
+
+    /**
+     * @param KeyOption|null $keyOption configuration of the key to generate
+     *
+     * @throws KeyPairGenerationException when OpenSSL failed to generate keys
+     */
+    public function generateKeyPair(KeyOption $keyOption = null): KeyPair
+    {
+        if (null === $keyOption) {
+            $keyOption = new RsaKeyOption();
+        }
+
+        try {
+            $privateKey = $this->generator->generatePrivateKey($keyOption);
+        } catch (KeyGenerationException $e) {
+            throw new KeyPairGenerationException('Fail to generate a KeyPair with the given options', 0, $e);
+        }
+
+        return new KeyPair(
+            $privateKey->getPublicKey(),
+            $privateKey
+        );
+    }
+}