import { _PdfAbstractSyntaxElement } from '../asn1/abstract-syntax';
import { _PdfAlgorithms } from './x509-algorithm';
import { _PdfUniqueBitString } from './x509-bit-string-handler';
import { _PdfSignedCertificate } from './x509-signed-certificate';
/**
 * Representation of the top-level X.509 certificate structure (tbsCertificate + signature).
 *
 * @private
 */
export declare class _PdfX509CertificateStructure {
    /**
     * The parsed ToBeSigned certificate component.
     *
     * @private
     * @type {_PdfSignedCertificate}
     */
    _toBeSignedCertificate: _PdfSignedCertificate;
    /**
     * Algorithm identifier used for the certificate signature.
     *
     * @private
     * @type {_PdfAlgorithms}
     */
    _signatureAlgorithmIdentifier: _PdfAlgorithms;
    /**
     * Raw signature BIT STRING for the certificate.
     *
     * @private
     * @type {_PdfUniqueBitString}
     */
    _signature: _PdfUniqueBitString;
    /**
     * Underlying ASN.1 sequence elements representing the certificate.
     *
     * @private
     * @type {_PdfAbstractSyntaxElement[]}
     */
    _sequence: _PdfAbstractSyntaxElement[];
    constructor(seq?: _PdfAbstractSyntaxElement[]);
    /**
     * Return the parsed `ToBeSigned` certificate wrapper.
     *
     * @private
     * @returns {_PdfSignedCertificate} The signed certificate component.
     */
    _getSignedCertificate(): _PdfSignedCertificate;
    /**
     * Construct an instance from an ASN.1 sequence array if valid.
     *
     * @private
     * @param {any} obj - Candidate sequence array.
     * @returns {_PdfX509CertificateStructure} New structure instance or null.
     */
    _getInstance(obj: any): _PdfX509CertificateStructure;
    /**
     * Produce DER encoded bytes for the entire certificate structure.
     *
     * @private
     * @returns {Uint8Array} DER-encoded certificate bytes.
     */
    _getDerEncoded(): Uint8Array;
}