/// <reference types="node" />
export declare class CryptoService {
    private static encryptionAlgorithm;
    private static hashAlgorithm;
    private static hashIterations;
    private static keySize;
    private static ivSize;
    private static saltSize;
    private static version;
    private constructor();
    private static pInstance;
    static get instance(): CryptoService;
    static reset(): void;
    /**
     * Create pbkdf2 hash with 100k iterations with provided password and optionally salt
     * If salt is not provided - it will be generated and returned back
     * @param password
     * @param salt
     */
    getPasswordHash(password: string, salt?: Buffer): Promise<{
        hash: Buffer;
        salt: Buffer;
    }>;
    /**
     * Encrypt file with provided password
     * @param source
     * @param destination
     * @param password
     */
    encrypt(source: string, destination: string, password: string): Promise<void>;
    /**
     * Decrypt file
     * @param source
     * @param destination
     * @param password
     */
    decrypt(source: string, destination: string, password: string): Promise<void>;
    /**
     * Read stream into buffer
     * @param stream
     */
    private streamToBuffer;
}