Hash a Password with Argon2 (Defaults)

Demonstrates Crypt2.Argon2HashPassword, which hashes a password with Argon2 and returns a PHC-format string. Passing an empty options string uses all defaults, including a random salt.

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();

    //  The password should come from a secure source rather than being hard-coded.
    String password = "correct horse battery staple";

    //  Hash the password using all defaults by passing an empty options string.  The defaults are
    //  Argon2id, version 19, 3 iterations, 64 MB of memory, 1 lane, a 32-byte hash, and a 16-byte random
    //  salt.  A random salt is generated automatically, which is what should normally happen.
    String phcHash = crypt.argon2HashPassword(password,"");
    if (crypt.get_LastMethodSuccess() == false) {
        System.out.println(crypt.lastErrorText());
        return;
        }

    //  The returned PHC-format string records the variant, version, cost parameters, salt, and hash --
    //  everything needed to verify the password later.  Store the whole string.
    System.out.println(phcHash);
  }
}