(Node.js) Twofish OFB Output Feedback Mode Encryption

Demonstrates how to encrypt using Twofish OFB (Output Feedback) mode.

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.

    var crypt = new chilkat.Crypt2();

    crypt.CryptAlgorithm = "twofish";
    // Set the cipher mode to Output Feedback
    crypt.CipherMode = "ofb";
    crypt.KeyLength = 256;

    // EncodingMode specifies the encoding of the output for
    // encryption, and the input for decryption.
    // It may be "hex", "url", "base64", "quoted-printable", or many other choices.
    crypt.EncodingMode = "hex";

    var ivHex = "000102030405060708090A0B0C0D0E0F";
    crypt.SetEncodedIV(ivHex,"hex");

    // The secret key must equal the size of the key.  For
    // 256-bit encryption, the binary secret key is 32 bytes.
    var keyHex = "603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4";
    crypt.SetEncodedKey(keyHex,"hex");

    // Encrypt a string...
    var encStr = crypt.EncryptStringENC("Without music to decorate it, time is just a bunch of boring production deadlines or dates by which bills must be paid. -- Frank Zappa");
    console.log(encStr);

    var decrypt = new chilkat.Crypt2();
    decrypt.CryptAlgorithm = "twofish";
    decrypt.CipherMode = "ofb";
    decrypt.KeyLength = 256;
    decrypt.EncodingMode = "hex";
    decrypt.SetEncodedIV(ivHex,"hex");
    decrypt.SetEncodedKey(keyHex,"hex");

    // Now decrypt:
    var decStr = decrypt.DecryptStringENC(encStr);
    console.log(decStr);

}

chilkatExample();