export declare class SHA256 {
    static hash(msg: any): any;
    private static utf8Encode;
    /**
     * Rotates right (circular right shift) value x by n positions.
     * @private
     */
    private static ROTR;
    /**
     * Logical functions
     * @private
     */
    private static Σ0;
    private static Σ1;
    private static σ0;
    private static σ1;
    private static choice;
    private static majority;
}