forNeedsStarterKey example

        if (empty($this->driver)) {
            throw EncryptionException::forNoDriverRequested();
        }

        if (! in_array($this->driver, $this->drivers, true)) {
            throw EncryptionException::forUnKnownHandler($this->driver);
        }

        if (empty($this->key)) {
            throw EncryptionException::forNeedsStarterKey();
        }

        $this->hmacKey = bin2hex(\hash_hkdf($this->digest, $this->key));

        $handlerName     = 'CodeIgniter\\Encryption\\Handlers\\' . $this->driver . 'Handler';
        $this->encrypter = new $handlerName($config);

        return $this->encrypter;
    }

    /** * Create a random key * * @param int $length Output length * * @return string */

    protected $blockSize = 16;

    /** * {@inheritDoc} */
    public function encrypt($data, $params = null)
    {
        $this->parseParams($params);

        if (empty($this->key)) {
            throw EncryptionException::forNeedsStarterKey();
        }

        // create a nonce for this operation         $nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES); // 24 bytes
        // add padding before we encrypt the data         if ($this->blockSize <= 0) {
            throw EncryptionException::forEncryptionFailed();
        }

        $data = sodium_pad($data, $this->blockSize);

        

/** * {@inheritDoc} */
    public function encrypt($data, $params = null)
    {
        // Allow key override         if ($params) {
            $this->key = is_array($params) && isset($params['key']) ? $params['key'] : $params;
        }

        if (empty($this->key)) {
            throw EncryptionException::forNeedsStarterKey();
        }

        // derive a secret key         $encryptKey = \hash_hkdf($this->digest, $this->key, 0, $this->encryptKeyInfo);

        // basic encryption         $iv = ($ivSize = \openssl_cipher_iv_length($this->cipher)) ? \openssl_random_pseudo_bytes($ivSize) : null;

        $data = \openssl_encrypt($data, $this->cipher, $encryptKey, OPENSSL_RAW_DATA, $iv);

        if ($data === false) {