Node.js

AES-CMAC

See more Encryption Examples

Demonstrates using the AES-CMAC algorithm, which is a keyed hash function similar to HMAC and Poly1305.

Note: Chilkat added AES-CMAC in version 9.5.0.95.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // 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 AES-CMAC
    crypt.MacAlgorithm = "aes-cmac";

    // AES-CMAC always uses a 16-byte (128-bit) MAC key.
    var keyHex = "2b7e151628aed2a6abf7158809cf4f3c";
    success = crypt.SetMacKeyEncoded(keyHex,"hex");

    // Let's compute the AES-CMAC for the test vector at https://www.rfc-editor.org/rfc/rfc4493#appendix-A
    // Here we have 64 bytes in hex representation.
    var messageBytes = "6bc1bee22e409f96e93d7e117393172aae2d8a571e03ac9c9eb76fac45af8e5130c81c46a35ce411e5fbc1191a0a52eff69f2445df4f9b17ad2b417be66c3710";

    var bd = new chilkat.BinData();
    bd.AppendEncoded(messageBytes,"hex");

    // Compute the AES-CMAC for the bytes contained in bd and return the AES-CMAC in hex representation.
    crypt.EncodingMode = "hex_lower";
    var cmac = crypt.MacBdENC(bd);
    console.log(cmac);
    // Output should be: 51f0bebf7e3b9d92fc49741779363cfe

    // Now do the same for a string:
    var plainText = "'Twas brillig, and the slithy toves\nDid gyre and gimble in the wabe:\nAll mimsy were the borogoves,\nAnd the mome raths outgrabe.";
    var encTag = crypt.MacStringENC(plainText);
    console.log(encTag);

    // Output should be: 4fca1fcbd265048d247f99ab57fa3ceb

}

chilkatExample();