(JavaScript) Duplicate OpensSSL to Create Signature using Cert and Key Files

This example duplicates the following:

openssl smime –sign -in something.xml -out something.der -signer mycert.crt -inkey cert.key -outform der –nodetach

Note: Although "smime" is the OpenSSL command, it's not actually producing S/MIME. The arguments "-outform der -binary" indicates that the output is binary DER (i.e. the PKCS7 binary signature). The input can be any type of file: XML, PDF, JPG, ... *anything*...

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.

var crypt = new CkCrypt2();

// Load the cert and private key from separate files.
var cert = new CkCert();
success = cert.LoadFromFile("myCert.crt");
if (success !== true) {
    console.log(cert.LastErrorText);
    return;
}

var bd = new CkBinData();
success = bd.LoadFile("cert.key");
var privkey = new CkPrivateKey();
// Load from any format private key.
// If the file does not need a password, the 2nd arg is ignored.
success = privkey.LoadAnyFormat(bd,"password_if_needed");
if (success !== true) {
    console.log(privkey.LastErrorText);
    return;
}

success = crypt.SetSigningCert2(cert,privkey);
if (success !== true) {
    console.log(crypt.LastErrorText);
    return;
}

// Create the opaque signature (PKCS7 binary DER that contains both the signature and original file data).
success = crypt.CreateP7M("qa_data/infile.anything","qa_output/outfile.der");
if (success !== true) {
    console.log(crypt.LastErrorText);
    return;
}

console.log("Success.");