/**
 * Interleaves a sequence of bytes. When encrypting EO data, bytes are "woven" into each other.
 * <br>
 * Used when encrypting packets and data files.
 *
 * @example
 *   {0, 1, 2, 3, 4, 5} → {0, 5, 1, 4, 2, 3}
 *
 * @remarks
 * This is an in-place operation.
 *
 * @param data - the data to interleave
 */
export declare function interleave(data: Uint8Array): void;
/**
 * Deinterleaves a sequence of bytes. This is the reverse of `interleave`. <br>
 * Used when decrypting packets and data files.
 *
 * @example
 *   {0, 1, 2, 3, 4, 5} → {0, 2, 4, 5, 3, 1}
 *
 * @remarks
 * This is an in-place operation.
 *
 * @param data - the data to deinterleave
 */
export declare function deinterleave(data: Uint8Array): void;
/**
 * Flips the most significant bits of each byte in a sequence of bytes. (Values `0` and `128` are
 * not flipped.) <br>
 * Used when encrypting and decrypting packets.
 *
 * @example
 *   {0, 1, 127, 128, 129, 254, 255} → {0, 129, 255, 128, 1, 126, 127}
 *
 * @remarks
 * This is an in-place operation.
 *
 * @param data - the data to flip most significant bits on
 */
export declare function flipMsb(data: Uint8Array): void;
/**
 * Swaps the order of contiguous bytes in a sequence of bytes that are divisible by a given
 * multiple value. <br>
 * Used when encrypting and decrypting packets and data files.
 *
 * @example
 * multiple = 3
 * {10, 21, 27} → {10, 27, 21}
 *
 * @remarks
 * This is an in-place operation.
 *
 * @param data - the data to swap bytes in
 * @param multiple - the multiple value
 */
export declare function swapMultiples(data: Uint8Array, multiple: number): void;
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