/**
 * DOCX Module - CFB (Compound File Binary) Reader
 *
 * Minimal reader for OLE2/CFB format used by encrypted Office documents.
 * Implements enough of MS-CFB to extract named streams (EncryptionInfo, EncryptedPackage).
 *
 * References:
 *   - MS-CFB: Compound File Binary File Format
 *   - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-cfb
 */
/** A stream entry extracted from/written to a CFB file. */
export interface CfbEntry {
    /** Stream name (UTF-16LE decoded). */
    readonly name: string;
    /** Stream data. */
    readonly data: Uint8Array;
    /**
     * Optional storage path for the stream. Each element is a storage
     * (directory) name; the stream lives inside the nested storages.
     * For example `path: ["\u0006DataSpaces", "TransformInfo"]` with
     * `name: "..."` places the stream at
     * `\u0006DataSpaces/TransformInfo/<name>`. Omit or use `[]` for a
     * top-level stream under the root storage.
     */
    readonly path?: readonly string[];
}
/**
 * Read a CFB (OLE2 Compound File) and extract all stream entries.
 *
 * Only reads v3 and v4 CFB files (sector sizes 512 and 4096).
 *
 * @param buffer - The CFB file data.
 * @returns Array of named stream entries.
 */
export declare function readCfb(buffer: Uint8Array): CfbEntry[];
/**
 * Write a set of named stream entries into a CFB (OLE2 Compound File) container.
 *
 * Produces a v3 CFB with 512-byte sectors. Streams smaller than 4096 bytes are
 * stored in the mini-stream (64-byte mini-sectors) exactly as Office does;
 * larger streams use regular sectors. Entries may declare a `path` to nest the
 * stream inside one or more storages — required for the `\u0006DataSpaces`
 * structure that Office demands in encrypted documents.
 *
 * @param entries - Named stream entries to include.
 * @returns The CFB file as a Uint8Array.
 */
export declare function writeCfb(entries: readonly CfbEntry[]): Uint8Array;