/// <reference path="../../../third_party/uTransformers/utransformers.d.ts" />
/**
 * An obfuscator which employs the Caesar cipher. *This does not provide any
 * real security!* It's intended to help prototype the interface between
 * transport and obfuscation and was chosen because even though it's trivial to
 * implement it still requires some configuration.
 */
declare class CaesarCipher implements Transformer {
    /** Value by which bytes' values are shifted. */
    private shift_;
    constructor();
    /**
     * Caesar cipher requires just one parameter: the value by which to shift
     * each byte. key should be an ArrayBuffer of just one byte, the value of
     * which will be used for the shift amount (the byte is interpreted as
     * an unsigned integer, so negative shift is not possible).
     */
    setKey: (key: ArrayBuffer) => void;
    /** Nothing to configure -- all this transformer needs is a key. */
    configure: (json: string) => void;
    transform: (buffer: ArrayBuffer) => ArrayBuffer;
    restore: (buffer: ArrayBuffer) => ArrayBuffer;
    dispose: () => void;
    /** Applies mapper to each byte of buffer. */
    private map_;
    transformByte: (i: number) => number;
    restoreByte: (i: number) => number;
}
export = CaesarCipher;