SSL encryption/decryption

gistfile1.txt

class Ssl
{
    private $cipher = "aes-128-gcm";
    private $options = 0;

    /**
     * @param string $plaintext
     * @return array
     */
    public function encrypt($plaintext)
    {
        $key = \openssl_random_pseudo_bytes(16);
        $ivlen = \openssl_cipher_iv_length($this->cipher);
        $iv = \openssl_random_pseudo_bytes($ivlen);
        $ciphertext = openssl_encrypt($plaintext, $this->cipher, $key, $this->options, $iv,$tag);

        return array(
            'key' => \bin2hex($key),
            'iv' => \bin2hex($iv),
            'tag' => \bin2hex($tag),
            'ciphertext' => $ciphertext,
        );
    }

    /**
     * @param string $json
     * @return false|string
     */
    public function decrypt($json, $key)
    {
        $data = \json_decode($json);
        $result = \openssl_decrypt($data->ciphertext, $this->cipher, \hex2bin($key), $this->options, \hex2bin($data->iv), \hex2bin($data->tag));

        return \json_decode($result, true);
    }
}