(Java) HMAC Hex String

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

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkCrypt2 crypt = new CkCrypt2();

    boolean success = crypt.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
        }

    //  Set the MAC algorithm to HMAC
    crypt.put_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', ...)
    String keyHex = "41C21CB9D7A02FC5D4FADB9E4755B9DE";
    success = crypt.SetMacKeyEncoded(keyHex,"hex");

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

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

    //  Do the HMAC-SHA256 hash and return as a hex string:
    crypt.put_EncodingMode("hex");
    crypt.put_HashAlgorithm("sha-256");
    String macHex = crypt.macBdENC(bd);
    System.out.println(macHex);
  }
}