Initial commit

application/Espo/Core/Utils/Crypt.php

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+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\Utils;
+
+use RuntimeException;
+
+class Crypt
+{
+    private string $cryptKey;
+    private ?string $key = null;
+    private ?string $iv = null;
+
+    public function __construct(Config $config)
+    {
+        $this->cryptKey = $config->get('cryptKey', '');
+    }
+
+    private function getKey(): string
+    {
+        if ($this->key === null) {
+            $this->key = hash('sha256', $this->cryptKey, true);
+        }
+
+        if (!$this->key) {
+            throw new RuntimeException("Could not hash the key.");
+        }
+
+        return $this->key;
+    }
+
+    private function getIv(): string
+    {
+        if ($this->iv === null) {
+            if (!extension_loaded('openssl')) {
+                throw new RuntimeException("openssl extension is not loaded.");
+            }
+
+            $iv = openssl_random_pseudo_bytes(16);
+
+            $this->iv = $iv;
+        }
+
+        return $this->iv;
+    }
+
+    public function encrypt(string $string): string
+    {
+        $iv = $this->getIv();
+
+        if (!extension_loaded('openssl')) {
+            throw new RuntimeException("openssl extension is not loaded.");
+        }
+
+        return base64_encode(
+            openssl_encrypt($string, 'aes-256-cbc', $this->getKey(), OPENSSL_RAW_DATA, $iv) . $iv
+        );
+    }
+
+    public function decrypt(string $encryptedString): string
+    {
+        $encryptedStringDecoded = base64_decode($encryptedString);
+        $string = substr($encryptedStringDecoded, 0, strlen($encryptedStringDecoded) - 16);
+        $iv = substr($encryptedStringDecoded, -16);
+
+        if (!extension_loaded('openssl')) {
+            throw new RuntimeException("openssl extension is not loaded.");
+        }
+
+        $value = openssl_decrypt($string, 'aes-256-cbc', $this->getKey(), OPENSSL_RAW_DATA, $iv);
+
+        if ($value === false) {
+            throw new RuntimeException("OpenSSL decrypt failure.");
+        }
+
+        return trim($value);
+    }
+}