CoreLibs add Security\SymmetricEncryption

src/Security/CreateKey.php

@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * very simple symmetric encryption
+ * better use: https://paragonie.com/project/halite
+ *
+ * this is for creating secret keys for
+ * Security\SymmetricEncryption
+ */
+
+declare(strict_types=1);
+
+namespace CoreLibs\Security;
+
+class CreateKey
+{
+	/**
+	 * Create a random key that is a hex string
+	 *
+	 * @return string Hex string key for encrypting
+	 */
+	public static function generateRandomKey(): string
+	{
+		return self::bin2hex(self::randomKey());
+	}
+
+	/**
+	 * create a random string as binary to encrypt data
+	 * to store it in clear text in some .env file use bin2hex
+	 *
+	 * @return string Binary string for encryption
+	 */
+	public static function randomKey(): string
+	{
+		return random_bytes(SODIUM_CRYPTO_SECRETBOX_KEYBYTES);
+	}
+
+	/**
+	 * convert binary key to hex string
+	 *
+	 * @param  string $hex_key Convert binary key string to hex
+	 * @return string
+	 */
+	public static function bin2hex(string $hex_key): string
+	{
+		return sodium_bin2hex($hex_key);
+	}
+
+	/**
+	 * convert hex string to binary key
+	 *
+	 * @param  string $string_key Convery hex key string to binary
+	 * @return string
+	 */
+	public static function hex2bin(string $string_key): string
+	{
+		return sodium_hex2bin($string_key);
+	}
+}
+
+// __END__