Node.js

POP3 Verify Signed (S/MIME) Email

Demonstrates how to download and verify digitally signed S/MIME email. 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 mailman = new chilkat.MailMan();

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

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

    var stUidls = new chilkat.StringTable();
    success = mailman.FetchUidls(stUidls);
    if (success == false) {
        console.log(mailman.LastErrorText);
        return;
    }

    var email = new chilkat.Email();
    var cert = new chilkat.Cert();

    var count = stUidls.Count;
    var i = 0;
    while (i < count) {
        // Download the full email.
        success = mailman.FetchByUidl(stUidls.StringAt(i),false,0,email);
        if (success == false) {
            console.log(mailman.LastErrorText);
            return;
        }

        console.log(i);
        console.log("From: " + email.From);
        console.log("Subject: " + 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);

                success = email.LastSignerCert(0,cert);
                if (success == false) {
                    console.log(email.LastErrorText);
                    return;
                }

                console.log("Signing cert: " + cert.SubjectCN);
            }

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

        i = i+1;
    }

    mailman.Pop3EndSession();

}

chilkatExample();