public function getToken($tokenId) {

		if($this->storage->hasToken($tokenId)) {
			return $this->storage->getToken($tokenId);
		}

		$token = new CsrfToken(
			$tokenId,
			$this->generateValue((int) $this->tokenLength)
		);

		$this->storage->setToken($tokenId, $token);

		return $token;
	}