(Node.js) Load Signed and/or Encrypted Email and Unwrap Security Layers

The LoadEml method loads an email (.eml file containing the MIME of an email) and automatically unwraps the digital signature and encryption security layers. A program can then examine the properties of the email object to see what was unwrapped.

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() {

    var email = new chilkat.Email();

    // Provide PFX/.p12 files for any certs+keys needed for decryption.
    // Signature verification does not need anything extra.  
    // (Also, Chilkat will automatically find and use pre-installed certs + private keys needed for decryption
    // on a Windows system.)
    var success = email.AddPfxSourceFile("/pfxFiles/certs_and_keys_1.pfx","pfxPassword1");
    if (success !== true) {
        console.log(email.LastErrorText);
        return;
    }

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

    // ...

    // Load a potentially signed and/or encrypted email.
    success = email.LoadEml("someDir/someEmail.eml");

    // If the email was signed and/or encrypted, it was "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.");
        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.");
        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.");
        }

    }

    // At this point, the contents of the email, including attachments, can be accessed normally..

}

chilkatExample();