(Java) WPA Key Calculation from PassPhrase to Hex

Demonstrates how to calculate a WPA key from a passprhase and network SSID.

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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 the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkCrypt2 crypt = new CkCrypt2();

    String wpaHexKey;

    // The "ps" is the WPA passphrase
    String pw = "password";
    String pwCharset = "ansi";

    // Hash algorithms may be: sha1, md2, md5, etc.
    String hashAlg = "sha1";

    // Specify the SSID in hex:
    // For example, if the SSID is "ABC", then the 
    // hex values for these us-ascii chars is "414243"
    String ssidHex = "414243";

    // The WPA key calculation will always use 4096 iterations.
    int iterationCount = 4096;

    // The WPA hex output should be 256 bits.
    int outputBitLen = 256;

    // Indicate that "hex" is to be returned.
    String enc = "hex";

    wpaHexKey = crypt.pbkdf2(pw,pwCharset,hashAlg,ssidHex,iterationCount,outputBitLen,enc);

    System.out.println(wpaHexKey);
  }
}