/** Thrown when the bytes are encrypted and the password does not open them. */
export declare class WrongPasswordError extends Error {
    /** @param message The message to carry; the default states the failure. */
    constructor(message?: string);
}
/** Whether the bytes are an OOXML package encrypted per ECMA-376 §2.3. */
export declare function isEncryptedPackage(bytes: Uint8Array): boolean;
/**
 * Decrypt an encrypted OOXML package into the plain OPC zip inside it.
 *
 * @param bytes    The compound file (`EncryptionInfo` + `EncryptedPackage`).
 * @param password The password to open it with.
 * @returns The decrypted package bytes — an ordinary `.docx`/`.xlsx` zip.
 * @throws WrongPasswordError when the password fails the document's own
 * verifier, and Error when the encryption is one this reader does not know.
 */
export declare function decryptPackage(bytes: Uint8Array, password: string): Uint8Array;