setCrypto 在 itextpdf 5.5.13.3 上找不到

Question

我将 itextpdf 从 5.2.1 更新到 5.5.13.3 以修复漏洞，但找不到函数 setCrypto。它被什么功能取代了？

PdfSignatureAppearance sap = stamper.getSignatureAppearance();
sap.setCrypto(privateKey, certificateChain, null, PdfSignatureAppearance.SELF_SIGNED); // this function remove on itextpdf 5.5.13.3

//5.2.1 上的文档

/**
 * Sets the cryptographic parameters.
 * @param privKey the private key
 * @param certChain the certificate chain
 * @param crlList the certificate revocation list. It may be <CODE>null</CODE>
 * @param filter the cryptographic filter type. It can be SELF_SIGNED, VERISIGN_SIGNED or WINCER_SIGNED
 */
public void setCrypto(PrivateKey privKey, Certificate[] certChain, CRL[] crlList, PdfName filter) {
    this.privKey = privKey;
    this.certChain = certChain;
    this.crlList = crlList;
    this.filter = filter;
}