(Node.js) Send Encrypted Email using Certificate in Apple Keychain

See more Apple Keychain Examples

Send encrypted (S/MIME) email using a certificate found in the Apple Keychain.

Note: This example requires Chilkat v10.1.2 or later.

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

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    var email = new chilkat.Email();
    email.Subject = "This email is encrypted";
    email.Body = "This is a S/MIME encrypted mail";
    email.From = "Joe <joe@example.com>";

    // Emails are encrypted using the recipient's certificate.
    var recipientEmailAddr = "jane@example2.com";
    email.AddTo("",recipientEmailAddr);

    // Indicate that the email is to be sent encrypted.
    email.SendEncrypted = true;

    var cert = new chilkat.Cert();

    // -----------------------------------------------
    // This example requires Chilkat v10.1.2 or later.
    // -----------------------------------------------

    // The recipient's certificate is used to encrypt.
    // This will load the certificate from the Apple Keychain.
    var success = cert.LoadByEmailAddress(recipientEmailAddr);
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    // Specify the certificate to be used for encryption.
    success = email.SetEncryptCert(cert);
    email.SendEncrypted = true;

    var mailman = new chilkat.MailMan();
    mailman.SmtpHost = "smtp.example.com";
    mailman.SmtpUsername = "joe@example.com";
    mailman.SmtpPort = 587;
    mailman.StartTLS = true;

    // We'll get the SMTP password from the Apple Keychain.
    // See how we originally saved the email credentials to the Keychain here:
    // Save Email Credentials in Apple Keychain or Windows Credentials Manager
    var secrets = new chilkat.Secrets();

    // On Windows, this is the Windows Credentials Manager
    // On MacOS/iOS, it is the Apple Keychain
    secrets.Location = "local_manager";

    // Specify the name of the secret.
    // service and username are required.
    // appName and domain are optional.
    // Note: The values are arbitrary and can be anything you want.
    var json = new chilkat.JsonObject();
    json.UpdateString("appName","MyEmailApp");
    json.UpdateString("service","SMTP");
    json.UpdateString("domain","example.com");
    json.UpdateString("username","joe@example.com");

    mailman.SmtpPassword = secrets.GetSecretStr(json);

    // Send the encrypted email.
    // The email is encrypted and sent within the SendEmail function.
    success = mailman.SendEmail(email);
    if (success !== true) {
        console.log(mailman.LastErrorText);
        return;
    }

    console.log("Encrypted email sent!");

}

chilkatExample();