/**
 * Provides internal NIST object identifiers (OIDs) for hash and signature algorithms.
 *
 * @private
 */
export declare class _NistObjectIdentifiers {
    /**
     * OID for the SHA-256 hash algorithm.
     *
     * @private
     */
    _secureHash256AlgorithmIdentifier: any;
    /**
     * OID for the SHA-384 hash algorithm.
     *
     * @private
     */
    _secureHash384AlgorithmIdentifier: any;
    /**
     * OID for the SHA-512 hash algorithm.
     *
     * @private
     */
    _secureHash512AlgorithmIdentifier: any;
    /**
     * OID for RIPEMD-160 (race evaluation message digest).
     *
     * @private
     */
    _raceEvaluationMessageDigestAlgorithmIdentifier: any;
    /**
     * OID for the SHA-256 signature algorithm identifier.
     *
     * @private
     */
    _digitalSignatureWithSecureHash256AlgorithmIdentifier: any;
    /**
     * OID for the RIPEMD-160 with RSA (race evaluation with Ron cipher) algorithm identifier.
     *
     * @private
     */
    _ronCipherWithRaceEvaluationAlgorithmIdentifier: any;
}
/**
 * OID for the RIPEMD-160 with RSA (race evaluation with Ron cipher) algorithm identifier.
 *
 * @private
 */
export declare class _PdfCryptographicObjectIdentifier {
    /**
     * OID for the MD5 message-digest.
     *
     * @private
     */
    _messageDigest5: any;
    /**
     * OID for SHA-1 with RSA encryption.
     *
     * @private
     */
    _secureHash1WithRonCipherEncryption: any;
    /**
     * OID for SHA-256 with RSA encryption.
     *
     * @private
     */
    _secureHash256WithRonCipherEncryption: any;
    /**
     * OID for SHA-384 with RSA encryption.
     *
     * @private
     */
    _secureHash384WithRonCipherEncryption: any;
    /**
     * OID for SHA-512 with RSA encryption.
     *
     * @private
     */
    _secureHash512WithRonCipherEncryption: any;
    /**
     * OID for MD2 with RSA encryption.
     *
     * @private
     */
    _messageDigest2WithRonCipherEncryption: any;
    /**
     * OID for RSA encryption (public key).
     *
     * @private
     */
    _raceEvaluationEncryption: any;
}
/**
 * Provides internal CMS/PKCS digital content and attribute OIDs used in signatures.
 *
 * @private
 */
export declare class _PdfDigitalIdentifiers {
    /**
     * OID for PKCS#7 Data content type.
     *
     * @private
     */
    _cryptographicData: string;
    /**
     * OID for PKCS#7 SignedData content type.
     *
     * @private
     */
    _cryptographicSignedData: string;
    /**
     * OID for RSA encryption (public key).
     *
     * @private
     */
    _rsaEncryption: string;
    /**
     * OID for DSA signature (public key algorithm).
     *
     * @private
     */
    _dsaSignature: string;
    /**
     * OID for EC public key (public key algorithm).
     *
     * @private
     */
    _ecPublicKey: string;
    /**
     * OID for the CMS ContentType attribute.
     *
     * @private
     */
    _contentType: string;
    /**
     * OID for the CMS MessageDigest attribute.
     *
     * @private
     */
    _messageDigest: string;
    /**
     * OID for the CMS SigningCertificate attribute.
     *
     * @private
     */
    _signingCertificate: string;
    /**
     * OID for the Adobe RevocationInfoArchival attribute.
     *
     * @private
     */
    _revocation: string;
}