import { Cipher } from '../../crypto/types.js';
import { ByteArray } from '../../types.js';
import { PdfEncryptionAlgorithmType } from '../types.js';
import { PdfStandardSecurityHandler } from './base.js';
/**
 * V1 security handler implementing 40-bit RC4 encryption.
 * This is the original PDF encryption format (PDF 1.1).
 *
 * @example
 * ```typescript
 * const handler = new PdfV1SecurityHandler({
 *     password: 'user123',
 *     ownerPassword: 'admin456'
 * })
 * ```
 */
export declare class PdfV1SecurityHandler extends PdfStandardSecurityHandler {
    /**
     * Gets the encryption revision number.
     *
     * @returns 2 for V1 encryption.
     */
    getRevision(): number;
    /**
     * Gets the encryption version number.
     *
     * @returns 1 for 40-bit RC4 encryption.
     */
    getVersion(): number;
    /**
     * Gets the encryption key length in bits.
     *
     * @returns 40 for V1 encryption.
     */
    getKeyBits(): number;
    /**
     * Computes the owner key (O value) using RC4-40 algorithm.
     *
     * @returns The computed owner key.
     */
    protected computeOwnerKey(): Promise<ByteArray>;
    /**
     * Computes the user key (U value) using RC4-40 algorithm.
     *
     * @returns The computed user key.
     * @throws Error if document ID, owner key, or permissions are not set.
     */
    protected computeUserKey(): Promise<ByteArray>;
    /**
     * Computes the master encryption key from the password.
     *
     * @returns The computed master key.
     * @throws Error if required parameters are missing or password is incorrect.
     */
    protected computeMasterKey(): Promise<ByteArray>;
    /**
     * Computes the object-specific encryption key.
     *
     * @param objectNumber - The PDF object number.
     * @param generationNumber - The PDF generation number.
     * @param algorithm - Optional algorithm type for key derivation.
     * @returns The computed object key.
     * @throws Error if object or generation number is invalid.
     */
    computeObjectKey(objectNumber?: number, generationNumber?: number, algorithm?: PdfEncryptionAlgorithmType): Promise<ByteArray>;
    /**
     * Gets an RC4 cipher for the specified object.
     *
     * @param objectNumber - The PDF object number.
     * @param generationNumber - The PDF generation number.
     * @returns An RC4 cipher instance.
     */
    protected getCipher(objectNumber?: number, generationNumber?: number): Promise<Cipher>;
    /**
     * Recovers the user password from the owner password.
     *
     * @param ownerPassword - The owner password.
     * @returns The recovered user password as a string.
     */
    recoverUserPassword(ownerPassword?: ByteArray | string): Promise<string>;
}