(Node.js) POP3 Read S/MIME Encrypted Email

Read S/MIME encrypted 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-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

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

    // The mailman object is used for receiving (POP3) 
    // and sending (SMTP) email.
    var mailman = new chilkat.MailMan();

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

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

    // If running on Microsoft Windows, the Chilkat mailman
    // will automatically search the registry-based certificate stores
    // for matching certificates and private keys required for
    // decryption.  However, on Linux, MAX OS X, and other
    // operating systems, no such thing exists.  Therefore, you'll 
    // need to specify one or more PFX (.p12 / .pfx) files as
    // sources for locating the certs required for decyrption.
    var success = mailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_1.pfx","pfxPassword1");
    if (success !== true) {
        console.log(mailman.LastErrorText);
        return;
    }

    success = mailman.AddPfxSourceFile("/pfxFiles/certs_and_keys_2.pfx","pfxPassword2");
    if (success !== true) {
        console.log(mailman.LastErrorText);
        return;
    }

    // ...
    // Note: On MS Windows, it is not required to provide PFX sources
    // if the needed certs and private keys are already installed
    // on the system (in the registry-based certificate stores).

    // Copy the all email from the user's POP3 mailbox 
    // into a bundle object.  The email remains on the server.
    // bundle: EmailBundle
    var bundle = mailman.CopyMail();
    if (mailman.LastMethodSuccess == false) {
        console.log(mailman.LastErrorText);
        return;
    }

    // S/MIME security envelopes are automatically "unwrapped" 
    // when a message is retrieved from the server. Signed emails are automatically verified, and 
    // encrypted emails are automatically decrypted, restoring the email to the original state before 
    // signing and/or encrypting. Information about the signing and encrypting certificates can be 
    // retrieved from the Email object (methods: GetSignedByCert, GetEncryptedByCert; 
    // properties: SignedBy, EncryptedBy, SignaturesValid, Decrypted, ReceivedSigned, 
    // ReceivedEncrypted).

    // Loop over the bundle, 
    var i = 0;
    while (i < bundle.MessageCount) {
        // email: Email
        var email;
        email = bundle.GetEmail(i);

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

        // At this point, if the email was signed and/or encrypted, it is already "unwrapped", i.e.
        // the email is already decrypted and in a state as if it were never signed or encrypted.
        // You may check to see if the email was received encrypted or signed, and if so,
        // whether it was successfully unwrapped and who signed or encrypted it:
        if (email.ReceivedEncrypted == true) {

            console.log("This email was encrypted when received.");
            if (email.Decrypted == true) {
                console.log("This email was successfully decrypted.  It was encrypted by:");
                console.log(email.EncryptedBy);
            }
            else {
                console.log("This email was not decrypted.");
            }

        }

        if (email.ReceivedSigned == true) {

            console.log("This email was signed when received.");
            if (email.SignaturesValid == true) {
                console.log("The signature was verified.  It was signed by:");
                console.log(email.SignedBy);
            }
            else {
                console.log("The signature verification failed.");
            }

        }

        // The email's body, HTML body, attachments, etc.
        // are decrypted and available just like any non-encrypted email.

        console.log("--");

        i = i+1;
    }


}

chilkatExample();