(Node.js) POP3 Verify Signed (S/MIME) Email

Demonstrates how to download and verify digitally signed S/MIME email.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node11-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node11-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node11-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node11-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node11-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node11-macosx');
}

function chilkatExample() {

    var mailman = new chilkat.MailMan();

    // Any string argument automatically begins the 30-day trial.
    var success = mailman.UnlockComponent("30-day trial");
    if (success !== true) {
        console.log(mailman.LastErrorText);
        return;
    }

    // Set the POP3 server's hostname
    mailman.MailHost = "pop.someMailServer.com";

    // Set the POP3 login/password.
    mailman.PopUsername = "myLogin";
    mailman.PopPassword = "myPassword";

    // sa: StringArray
    var sa;

    sa = mailman.GetUidls();
    if (sa == null ) {
        console.log(mailman.LastErrorText);
        return;
    }

    var i;
    var n = sa.Count;

    // email: Email
    var email;
    var uidl;

    for (i = 0; i <= n - 1; i++) {

        uidl = sa.GetString(i);

        email = mailman.FetchEmail(uidl);
        if (email == null ) {
            console.log(mailman.LastErrorText);

            return;
        }

        console.log(email.From);
        console.log(email.Subject);

        // The security layers of signed and/or encrypted emails
        // are automatically "unwrapped" when loaded into
        // a Chilkat email object.
        // An application only needs to check to see if an email
        // was received signed or encrypted, and then examine
        // the success/failure.  For example:
        if (email.ReceivedSigned == true) {

            console.log("This email was signed.");

            // Check to see if the signatures were verified.
            if (email.SignaturesValid == true) {
                console.log("Digital signature(s) verified.");

                console.log("Signer: " + email.SignedBy);

                // The certificate used for signing may be obtained
                // by calling email.GetSignedByCert.
                // cert: Cert
                var cert;
                cert = email.GetSignedByCert();
                if (cert == null ) {
                    console.log("Failed to get signing certificate object.");
                }
                else {
                    console.log("Signing cert: " + cert.SubjectCN);

                }

            }
            else {
                console.log("Digital signature verification failed.");
            }

        }

    }

    success = mailman.Pop3EndSession();

}

chilkatExample();