export declare class CryptoA01 {
    private subtleCrypto;
    constructor();
    /**
     * Perform decryption using AES based V1 algorithm.
     *
     * string: the encrypted string (base64 encoded)
     * password: the password used for encryption
     * salt: the base64 encoded salt used
     */
    decrypt(token: string, password: string, salt: string): Promise<string>;
    private deriveKey;
    private splitKey;
    private base64UrlDecode;
}