我使用了一个示例（Node.js使用自动JSON规范化创建Egypt ITIDA CAdES-BES签名），但总是收到此错误（4043 4043：消息摘要属性值与计算值不匹配[消息摘要属性值与计算值不匹配]）。
你能帮我解决这个问题吗？
所用代码：

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

var crypt = new chilkat.Crypt2();
crypt.VerboseLogging = true;

var cert = new chilkat.Cert();
cert.VerboseLogging = true;

// Set the smart card PIN, which will be needed for signing.
cert.SmartCardPin = "12345678";

// There are many ways to load the certificate.  
// This example was created for a customer using an ePass2003 USB token.
// Assuming the USB token is the only source of a hardware-based private key..
var success = cert.LoadFromSmartcard("");
if (success !== true) {
    console.log(cert.LastErrorText);
    return;
}

// Tell the crypt class to use this cert.
success = crypt.SetSigningCert(cert);
if (success !== true) {
    console.log(crypt.LastErrorText);
    return;
}

var cmsOptions = new chilkat.JsonObject();
// Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
cmsOptions.UpdateBool("DigestData",true);
cmsOptions.UpdateBool("OmitAlgorithmIdNull",true);

// Indicate that we are passing normal JSON and we want Chilkat do automatically
// do the ITIDA JSON canonicalization:
cmsOptions.UpdateBool("CanonicalizeITIDA",true);

crypt.CmsOptions = cmsOptions.Emit();

// The CadesEnabled property applies to all methods that create CMS/PKCS7 signatures. 
// To create a CAdES-BES signature, set this property equal to true. 
crypt.CadesEnabled = true;

crypt.HashAlgorithm = "sha256";

var jsonSigningAttrs = new chilkat.JsonObject();
jsonSigningAttrs.UpdateInt("contentType",1);
jsonSigningAttrs.UpdateInt("signingTime",1);
jsonSigningAttrs.UpdateInt("messageDigest",1);
jsonSigningAttrs.UpdateInt("signingCertificateV2",1);
crypt.SigningAttributes = jsonSigningAttrs.Emit();

// By default, all the certs in the chain of authentication are included in the signature.
// If desired, we can choose to only include the signing certificate:
crypt.IncludeCertChain = false;

var jsonToSign = "{ ... }";

// Create the CAdES-BES signature.
crypt.EncodingMode = "base64";

// Make sure we sign the utf-8 byte representation of the JSON string
crypt.Charset = "utf-8";

var sigBase64 = crypt.SignStringENC(jsonToSign);
if (crypt.LastMethodSuccess == false) {
    console.log(crypt.LastErrorText);
    return;
}

console.log("Base64 signature:");
console.log(sigBase64);