(Java) Demonstrates HMAC SHA256

Demonstrates HMAC-SHA256. Also demonstrates HMAC-SHA1 and HMAC-MD5.

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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[])
  {
    // 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

    CkCrypt2 crypt = new CkCrypt2();

    crypt.put_MacAlgorithm("hmac");
    crypt.put_EncodingMode("hex");
    crypt.SetMacKeyString("key");
    String sData = "The quick brown fox jumps over the lazy dog";

    crypt.put_HashAlgorithm("SHA-256");
    System.out.println("HMAC_SHA256: " + crypt.macStringENC(sData));

    crypt.put_HashAlgorithm("MD5");
    System.out.println("HMAC_MD5: " + crypt.macStringENC(sData));

    crypt.put_HashAlgorithm("SHA-1");
    System.out.println("HMAC_SHA1: " + crypt.macStringENC(sData));

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