(Node.js) Encrypt / Decrypt a File and Verify it has not Changed

Demonstrates how to encrypt and decrypt a file, and verify it has not changed.

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 crypt = new chilkat.Crypt2();

    crypt.CryptAlgorithm = "aes";
    crypt.CipherMode = "cbc";
    crypt.KeyLength = 128;
    crypt.PaddingScheme = 0;

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

    var keyHex = "00010203040506071011121314151617";
    crypt.SetEncodedKey(keyHex,"hex");

    var dataFile = "qa_data/zips/HBIQ040615300005.ZIP";
    var outFile = "qa_output/HBIQ040615300005.enc";
    var outFile2 = "qa_output/HBIQ040615300005.ZIP";

    success = crypt.CkEncryptFile(dataFile,outFile);
    success = crypt.CkDecryptFile(outFile,outFile2);

    var fac = new chilkat.FileAccess();
    var bEqual = fac.FileContentsEqual(dataFile,outFile2);
    if (bEqual !== true) {
        console.log("Decrypted file not equal to the original.");
    }
    else {
        console.log("Success.");
    }


}

chilkatExample();