Node.js

Convert PDF to pdf.p7s (Digitally Signed)

See more CAdES Examples

Demonstrates how to convert a PDF into a .p7s file that contains the PDF within a PKCS7 signature (the .p7s format). Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    //  -----------------------------------------------------------------
    //  Note: This is case where the .p7s extension is used where the .p7m extension
    //  is technically more appropriate.
    //  See .p7s vs .p7m file extension
    //  -----------------------------------------------------------------

    var crypt = new chilkat.Crypt2();

    var cert = new chilkat.Cert();
    success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123");
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

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

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

    crypt.HashAlgorithm = "sha256";

    //  We can sign any type of file, creating a .p7s as output.
    //  The .p7s contains the signature and also embeds the data of the file that is signed.
    var inFile = "qa_data/pdf/sample.pdf";
    var p7sFile = "qa_output/sample.pdf.p7s";

    //  -----------------------------------------------------------------------------------------
    //  Also see Chilkat's online tool to examine a .p7m and generate code to duplicate the .p7m
    //  -----------------------------------------------------------------------------------------

    //  Create the CAdES-BES attached signature, which contains the original data.
    //  Note: Chilkat's function naming is not accurate.  CreateP7M creates a PKCS7 signature where the signed file
    //  is contained within the signature.  CreateP7S creates a detached PKCS7 signature where the signed file
    //  is NOT contained within the signature.  We want the data to be contained in the signature, therefore
    //  we call CreateP7M even though we are naming our output file .p7s.
    success = crypt.CreateP7M(inFile,p7sFile);
    if (success == false) {
        console.log(crypt.LastErrorText);
        return;
    }

    //  Verify the .p7s file and extract the original file from the .p7s. 
    var extractedToFilePath = "qa_output/sample.pdf";
    success = crypt.VerifyP7M(p7sFile,extractedToFilePath);
    if (success == false) {
        console.log(crypt.LastErrorText);
        return;
    }

    console.log("Success!");

}

chilkatExample();