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cacme/vendor/acmephp/ssl/Generator/DhKey/DhKeyGenerator.php

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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\DhKey;
+
+use AcmePhp\Ssl\Generator\KeyOption;
+use AcmePhp\Ssl\Generator\OpensslPrivateKeyGeneratorTrait;
+use AcmePhp\Ssl\Generator\PrivateKeyGeneratorInterface;
+use AcmePhp\Ssl\PrivateKey;
+use Webmozart\Assert\Assert;
+
+/**
+ * Generate random DH private key using OpenSSL.
+ *
+ * @author Jérémy Derussé <jeremy@derusse.com>
+ */
+class DhKeyGenerator implements PrivateKeyGeneratorInterface
+{
+    use OpensslPrivateKeyGeneratorTrait;
+
+    public function generatePrivateKey(KeyOption $keyOption): PrivateKey
+    {
+        Assert::isInstanceOf($keyOption, DhKeyOption::class);
+
+        return $this->generatePrivateKeyFromOpensslOptions([
+            'private_key_type' => OPENSSL_KEYTYPE_DH,
+            'dh' => [
+                'p' => $keyOption->getPrime(),
+                'g' => $keyOption->getGenerator(),
+            ],
+        ]);
+    }
+
+    public function supportsKeyOption(KeyOption $keyOption): bool
+    {
+        return $keyOption instanceof DhKeyOption;
+    }
+}

cacme/vendor/acmephp/ssl/Generator/DhKey/DhKeyOption.php

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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\DhKey;
+
+use AcmePhp\Ssl\Generator\KeyOption;
+
+class DhKeyOption implements KeyOption
+{
+    /** @var string */
+    private $generator;
+
+    /** @var string */
+    private $prime;
+
+    /**
+     * @param string $prime     Hexadecimal representation of the prime
+     * @param string $generator Hexadecimal representation of the generator: ie. 02
+     *
+     * @see https://tools.ietf.org/html/rfc3526 how to choose a prime and generator numbers
+     */
+    public function __construct(string $prime, string $generator = '02')
+    {
+        $this->generator = pack('H*', $generator);
+        $this->prime = pack('H*', $prime);
+    }
+
+    public function getGenerator(): string
+    {
+        return $this->generator;
+    }
+
+    public function getPrime(): string
+    {
+        return $this->prime;
+    }
+}