Node.js

Get PDF Signer Certs

See more PDF Signatures Examples

This example demonstrates how to validate the signatures in a PDF and also shows how to get Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var pdf = new chilkat.Pdf();

    // Load a PDF that has cryptographic signatures to be validated
    success = pdf.LoadFile("qa_data/pdf/sign_testing_1/helloSigned2.pdf");
    if (success == false) {
        console.log(pdf.LastErrorText);
        return;
    }

    // Each time we verify a signature, information about the signature is written into
    // sigInfo (replacing whatever sigInfo previously contained).
    var sigInfo = new chilkat.JsonObject();

    // Iterate over each signature and validate each.
    var numSignatures = pdf.NumSignatures;
    var validated = false;
    var cert = new chilkat.Cert();
    var i = 0;
    while (i < numSignatures) {
        validated = pdf.VerifySignature(i,sigInfo);
        console.log("Signature " + i + " validated: " + validated);

        // After calling VerifySignature, you can get the signer certificate by calling
        // GetSignerCert with the same index. 
        success = pdf.GetSignerCert(i,cert);
        if (success !== false) {
            console.log("PDF signer certificate: " + cert.SubjectDN);
        }

        i = i+1;
    }

    console.log("Finished.");

}

chilkatExample();