(JavaScript) Sign PDF in the Cloud using AWS CloudHSM

See more Signing in the Cloud Examples

Note: This example requires Chilkat v9.5.0.96 or greater.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

// Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

var pkcs11 = new CkPkcs11();

// Provide the path to the AWS CloudHSM PKCS11 driver.
// This example runs on Windows, so we'll provide the CloudHSM DLL.
// If your code runs on Linux, the CloudHSM driver might be at /opt/cloudhsm/lib/libcloudhsm_pkcs11.so
pkcs11.SharedLibPath = "C:\\Program Files\\Amazon\\CloudHSM\\lib\\cloudhsm_pkcs11.dll";

// Your PIN should be a string containing your crypto user's login and password, with a colon char delimiting.
// See https://docs.aws.amazon.com/cloudhsm/latest/userguide/pkcs11-pin.html
var pin = "user:password";
var userType = 1;

// Establish a PKCS logged-on session using the driver (.so, .dylib, or .dll) as specified in the SharedLibPath above.
success = pkcs11.QuickSession(userType,pin);
if (success == false) {
    console.log(pkcs11.LastErrorText);
    return;
}

var cert = new CkCert();
success = cert.LoadFromFile("qa_data/certs/myCert.cer");
if (success == false) {
    console.log(cert.LastErrorText);
    return;
}

// Tell the certificate to link with the PKCS11 session.
// The cert's private key should be installed on the CloudHSM.
// If there are multiple private keys on the CloudHSM, then Chilkat will automatically
// locate and use the private key corresponding to the certificate.
success = cert.LinkPkcs11(pkcs11);
if (success == false) {
    console.log(cert.LastErrorText);
    return;
}

// --------------------------------------------------------------------------
// At this point, we have the cert to be used for signing.
// Our PDF signing code is the same as for a cert obtained from any other source..

var pdf = new CkPdf();

// Load a PDF to be signed.
success = pdf.LoadFile("qa_data/pdf/hello.pdf");
if (success == false) {
    console.log(pdf.LastErrorText);
    success = pkcs11.CloseSession();
    return;
}

var json = new CkJsonObject();

json.UpdateInt("page",1);
json.UpdateString("appearance.y","top");
json.UpdateString("appearance.x","left");
json.UpdateString("appearance.fontScale","10.0");
json.UpdateString("signingAlgorithm","pss");
json.UpdateString("hashAlgorithm","sha256");

var i = 0;
json.I = i;
json.UpdateString("appearance.text[i]","Digitaly signed by: Xyz Widgets, Inc.");
i = i+1;
json.I = i;
json.UpdateString("appearance.text[i]","current_dt");
i = i+1;
json.I = i;
json.UpdateString("appearance.text[i]","blah blah blah");

// The certificate is internally linked to the Pkcs11 object, which is currently in an authenticated session.
success = pdf.SetSigningCert(cert);

success = pdf.SignPdf(json,"qa_output/out.pdf");
if (success == false) {
    console.log(pdf.LastErrorText);
    success = pkcs11.CloseSession();
    return;
}

// --------------------------------------------------------------------------

// Revert to an unauthenticated session by calling Logout.
success = pkcs11.Logout();
if (success == false) {
    console.log(pkcs11.LastErrorText);
    success = pkcs11.CloseSession();
    return;
}

// When finished, close the session.
// It is important to close the session (memory leaks will occur if the session is not properly closed).
success = pkcs11.CloseSession();
if (success == false) {
    console.log(pkcs11.LastErrorText);
    return;
}

console.log("Success.");