(Node.js) HMAC Hex String

Demonstrates how to compute an HMAC using a hexidecimal key and data.

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();

    // Set the MAC algorithm to HMAC
    crypt.MacAlgorithm = "hmac";

    // Our HMAC key will be the bytes represented in the following hex string.
    // In other words, the HMAC key is composed of the bytes 0x41, 0xC2, 0x1C, ...
    // (It is not composed of the us-ascii string '4', '1', 'C', ...)
    var keyHex = "41C21CB9D7A02FC5D4FADB9E4755B9DE";
    var success = crypt.SetMacKeyEncoded(keyHex,"hex");

    // Our desire is to HMAC the bytes represented in the following string:
    var dataHex = "C22078065B01460001000000010062043BF5B18228C8E02D17BCFE4E00561FA6DEC216EA97195CEB579942E275C21932258E3CD391E507FF4E7FD4C787A8447DA111C54A9C1795E7FF4C0BAA2EDA";

    // We'll need to decode the hex to binary:
    var bd = new chilkat.BinData();
    bd.AppendEncoded(dataHex,"hex");

    // Do the HMAC-SHA256 hash and return as a hex string:
    crypt.EncodingMode = "hex";
    crypt.HashAlgorithm = "sha-256";
    var macHex = crypt.MacBdENC(bd);
    console.log(macHex);

}

chilkatExample();