(Node.js) Demonstrates the MacBytes Method

Demonstrates the MacBytes method to do HMAC-SHA256, HMAC-SHA1, and HMAC-MD5.

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 Chilkat Crypt2 to have been previously unlocked.
    // See Unlock Crypt2 for sample code.

    // Demonstrates how to reproduce the following results found at
    // https://en.wikipedia.org/wiki/Hash-based_message_authentication_code

    // HMAC_SHA256("key", "The quick brown fox jumps over the lazy dog") = 0xf7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8
    // HMAC_MD5("key", "The quick brown fox jumps over the lazy dog")    = 0x80070713463e7749b90c2dc24911e275
    // HMAC_SHA1("key", "The quick brown fox jumps over the lazy dog")   = 0xde7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9

    var crypt = new chilkat.Crypt2();

    crypt.MacAlgorithm = "hmac";
    crypt.EncodingMode = "hex";
    crypt.SetMacKeyString("key");
    var sData = "The quick brown fox jumps over the lazy dog";

    // We're doing this in a convoluted, roundabout fashion to show syntax
    // and data types for handling binary data.
    // The straightforward way of doing an HMAC on a string is
    // shown here: HMAC String

    var binData = new chilkat.BinData();
    binData.AppendString(sData,"utf-8");
    dataToHmac = binData.GetBinary();

    crypt.HashAlgorithm = "SHA-256";
    macBytes = crypt.MacBytes(dataToHmac);
    binData.Clear();
    binData.AppendBinary(macBytes);
    console.log("HMAC_SHA256: " + binData.GetEncoded("hex"));

    crypt.HashAlgorithm = "MD5";
    macBytes = crypt.MacBytes(dataToHmac);
    binData.Clear();
    binData.AppendBinary(macBytes);
    console.log("HMAC_MD5: " + binData.GetEncoded("hex"));

    crypt.HashAlgorithm = "SHA-1";
    macBytes = crypt.MacBytes(dataToHmac);
    binData.Clear();
    binData.AppendBinary(macBytes);
    console.log("HMAC_SHA1: " + binData.GetEncoded("hex"));

    // The output is the same (ignore case)
    // HMAC_SHA256: F7BC83F430538424B13298E6AA6FB143EF4D59A14946175997479DBC2D1A3CD8
    // HMAC_MD5: 80070713463E7749B90C2DC24911E275
    // HMAC_SHA1: DE7C9B85B8B78AA6BC8A7A36F70A90701C9DB4D9

}

chilkatExample();