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2024-08-05 22:57:28 +08:00
commit 0efda6c02a
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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\Parser;
+
+use AcmePhp\Ssl\Exception\KeyFormatException;
+use AcmePhp\Ssl\Exception\KeyParsingException;
+use AcmePhp\Ssl\Key;
+use AcmePhp\Ssl\ParsedKey;
+
+/**
+ * Parse keys to extract metadata.
+ *
+ * @author Titouan Galopin
+ */
+class KeyParser
+{
+    public function parse(Key $key): ParsedKey
+    {
+        try {
+            $resource = $key->getResource();
+        } catch (KeyFormatException $e) {
+            throw new KeyParsingException('Fail to load resource for key', 0, $e);
+        }
+
+        $rawData = openssl_pkey_get_details($resource);
+
+        // PHP 8 automatically frees the key instance and deprecates the function
+        if (\PHP_VERSION_ID < 80000) {
+            openssl_free_key($resource);
+        }
+
+        if (!\is_array($rawData)) {
+            throw new KeyParsingException(sprintf('Fail to parse key with error: %s', openssl_error_string()));
+        }
+
+        foreach (['type', 'key', 'bits'] as $requiredKey) {
+            if (!isset($rawData[$requiredKey])) {
+                throw new KeyParsingException(sprintf('Missing expected key "%s" in OpenSSL key', $requiredKey));
+            }
+        }
+
+        $details = [];
+
+        if (OPENSSL_KEYTYPE_RSA === $rawData['type']) {
+            $details = $rawData['rsa'];
+        } elseif (OPENSSL_KEYTYPE_DSA === $rawData['type']) {
+            $details = $rawData['dsa'];
+        } elseif (OPENSSL_KEYTYPE_DH === $rawData['type']) {
+            $details = $rawData['dh'];
+        } elseif (OPENSSL_KEYTYPE_EC === $rawData['type']) {
+            $details = $rawData['ec'];
+        }
+
+        return new ParsedKey($key, $rawData['key'], $rawData['bits'], $rawData['type'], $details);
+    }
+}