Java

HMAC Hex String

See more Encryption Examples

Demonstrates how to compute an HMAC using a hexidecimal key and data. Chilkat2 Java

import com.chilkatsoft.chilkat2.BinData;
import com.chilkatsoft.chilkat2.Crypt2;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Crypt2 crypt = new Crypt2();

        // Set the MAC algorithm to HMAC
        crypt.setMacAlgorithm("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";
        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:
        BinData bd = new BinData();
        bd.appendEncoded(dataHex, "hex");

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