Java

PBKDF2 Key Derivation

Demonstrates AES secret key derivation from a password using PBDKF2. Java

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 password = "correcthorsebatterystaple";

    //  Derive from the utf-8 byte representation of the password.
    String charset = "utf-8";

    String hashAlg = "sha256";

    crypt.put_EncodingMode("hex");
    String saltHex = crypt.genRandomBytesENC(16);

    int iterationCount = 310000;

    //  Derive a 256-bit key from the password.
    int outputBitLen = 256;

    //  The derived key is returned as a hex or base64 encoded string.
    //  (Note: The salt argument must be a string that also uses
    //  the same encoding.)
    String enc = "hex";

    String hexKey = crypt.pbkdf2(password,charset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

    System.out.println(hexKey);

    //  Sample output:
    //  597734C894FF89CFD3B93D925462C24E97724BCB118F6FC919007F5ABC27E768
  }
}