import { Cipher } from '../../crypto/types.js';
import { PdfCryptFilter, CryptFilterOptions } from './base.js';
/**
 * AESV3 crypt filter using AES-256-CBC encryption.
 * Implements 256-bit AES encryption in CBC mode for PDF content.
 * This is the recommended encryption method for new documents.
 *
 * @example
 * ```typescript
 * const filter = new AesV3CryptFilter({
 *     authEvent: 'DocOpen',
 *     securityHandler
 * })
 * const encrypted = await filter.encrypt(data, objectNumber, generationNumber)
 * ```
 */
export declare class AesV3CryptFilter extends PdfCryptFilter {
    /**
     * Creates a new AES-256 crypt filter.
     *
     * @param options - Configuration options with authentication event and security handler.
     */
    constructor(options: {
        authEvent: CryptFilterOptions['authEvent'];
        securityHandler?: CryptFilterOptions['securityHandler'];
    });
    /**
     * Gets an AES-256 cipher for encryption/decryption.
     *
     * @param objectNumber - The PDF object number (unused for AESV3).
     * @param generationNumber - The PDF generation number (unused for AESV3).
     * @returns An AES-256 cipher instance.
     * @throws Error if security handler is not set.
     */
    getCipher(objectNumber?: number, generationNumber?: number): Promise<Cipher>;
}