(Node.js) Encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption

Demonstrates how to encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption.

Note: This example requires Chilkat v9.5.0.67 or greater.

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

    var success;
    var mime = new chilkat.Mime();

    // Create a MIME message to encrypt.
    mime.NewMultipartMixed();
    mime.AddHeaderField("someHeader1","Some value 1");
    mime.AddHeaderField("someHeader2","Some value 2");

    var part0 = new chilkat.Mime();
    part0.AddHeaderField("hdrA","Some value A");
    part0.AddHeaderField("hdrB","Some value B");
    part0.ContentType = "text/plain";
    part0.SetBody("This is the plain-text body.");

    var part1 = new chilkat.Mime();
    part1.AddHeaderField("hdrX","Some value X");
    part1.AddHeaderField("hdrY","Some value Y");
    part1.ContentType = "text/xml";
    part1.SetBody("<a>This is the XML body</a>");

    mime.AppendPart(part0);
    mime.AppendPart(part1);

    // The MIME to be encrypted:
    var sbMime = new chilkat.StringBuilder();
    mime.GetMimeSb(sbMime);
    console.log(sbMime.GetAsString());

    // 	Content-Type: multipart/mixed; boundary="------------080303020600020604010008"
    // 	someHeader1: Some value 1
    // 	someHeader2: Some value 2
    // 
    // 	--------------080303020600020604010008
    // 	hdrA: Some value A
    // 	hdrB: Some value B
    // 	Content-Type: text/plain
    // 
    // 	This is the plain-text body.
    // 	--------------080303020600020604010008
    // 	hdrX: Some value X
    // 	hdrY: Some value Y
    // 	Content-Type: text/xml
    // 
    // 	<a>This is the XML body</a>
    // 	--------------080303020600020604010008--
    // 

    // Load an RSA-based certificate.
    // (Encrypting MIME only requires the public key.  Decrypting MIME requires the private key.)
    var cert = new chilkat.Cert();
    success = cert.LoadFromFile("qa_data/rsaes-oaep/cert.pem");
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    // Set the email object properties to indicate the desired encryption.
    mime.Pkcs7CryptAlg = "aes";
    // If AES-256 is desired, set the following property to 256.
    mime.Pkcs7KeyLength = 128;
    mime.OaepPadding = true;
    // Other choices for the OAEP hash algorithm are "sha1", "sha384", and "sha512"
    mime.OaepHash = "sha256";

    // Encrypt the MIME (to create S/MIME, which stands for "Secure MIME")
    success = mime.Encrypt(cert);
    if (success !== true) {
        console.log(mime.LastErrorText);
        return;
    }

    console.log("---------------");
    console.log("Encrypted MIME:");
    console.log("---------------");
    console.log(mime.GetMime());

    console.log("Success.");

    // ---------------------------------------------------
    // This is sample output for RSAES-OAEP encrypted MIME:
    // ---------------------------------------------------

    // Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
    // someHeader1: Some value 1
    // someHeader2: Some value 2
    // Content-Disposition: attachment; filename="smime.p7m"
    // Content-Transfer-Encoding: base64
    // 
    // MIIDvAYJKoZIhvcNAQcDoIIDrTCCA6kCAQAxggGgMIIBnAIBADB1MGgxCzAJBgNVBAYTAlVTMQsw
    // CQYDVQQIDAJJTDEQMA4GA1UEBwwHV2hlYXRvbjEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQ
    // dHkgTHRkMRcwFQYDVQQDDA5DaGlsa2F0V2lkZ2V0cwIJAMRwugDmvniwMBwGCSqGSIb3DQEBBzAP
    // oA0wCwYJYIZIAWUDBAIBBIIBAFaUL1ga1bOrdqYKcMm+FHUacBvzfBxk0fnPA0AMBdN8BvTWT3CN
    // YuqBhjOGyq0FpYD9pVZybUuFMCVsVyIW2O62HnsOK58YaPEUUcdH2sI+yjqX9UAn0P0nVDSsVdeK
    // W8x9kMfZg+3UP+y1q+lu7VRJO3f2C9oLQpTkc4VW4n7UOcUI0waykLCjCTL8lFDb7/J3GeuMKyhH
    // 5riNz50kpbzqn7m2Ks9yA+QmcTdXclclGFr2vwEUFzSdT2pxh/vaUrogCxkYWbQ2eV7vZg6O4kV0
    // aqHBqySkPTAzHKiHH8K8GVdlTuJ8350CpICa4T8w7/Ht5I7dyOPPKy4C+rVtrvcwggH+BgkqhkiG
    // 9w0BBwEwHQYJYIZIAWUDBAECBBDTC2WNBN+z2I47/4Feu9YqgIIB0MZvl3nC/q/Wzil6HtfQTr12
    // Q5moHY+ORzAa1P9XvX2ZUFhW530mV395mQw/A4o4ekmX9eRPEZquYzZPLT8hNeZIuNdhpcSQUmad
    // rKnKkR0wKJ3jJ3LhOIohVBQSYs8kVDZKq6lJBIznlsurFelZoNEhyRschhteDZx5rb7fCe8c2+/O
    // DHxaqaHCAzm/Bd7kcg6FFfuTZy3tu0PgP5IsXN4OFA3kkvwjAs4XsVS8jdIcmDNBkYieE8WmJOIm
    // Mz7mh/CHWLgWfGKa0Dkb9RcbFgLwYNT3GzuXFw9XPbKkEZjEAtJajWbN6P0WQl96YYd9qZxUpGxZ
    // zjTHEYzViUdUXolfpLufttrRXyxN1RFWhNFMFbv66xYqklMSgpdM/Mbk+EuvX6eXayDPvDBpfYMw
    // NoRAzv1Ony2c0ez9rBemJICicxAzpuvHbRxdjYs63Dnv+TYgpBK12AxWWpPIjXvw0WQKgTC3Tg8s
    // EnuGhpENqso/clJBEBSn4+2WhYtYbdI5sVme67lvqQl1Xxy3r18SWaQbyDOwgYi1E+54lMDOxMy0
    // y0FPHk5pP45DnXWj+XORPp5LhuZr5mf62YOXSSUwR5P0cXy4Rc+pN5lhRQPCf5z2

}

chilkatExample();