(Android™) Password_Digest = Base64 (SHA-1 ( nonce + created + SHA-1 (password) ) )

Demonstrates how to compute:

Password_Digest = Base64 (SHA-1 ( nonce + created + SHA-1 (password)))

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

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

    String password = "secret";

    CkCrypt2 crypt = new CkCrypt2();
    crypt.put_HashAlgorithm("SHA-1");
    crypt.put_EncodingMode("base64");

    //  Generate a 16-byte random nonce
    CkPrng prng = new CkPrng();
    CkBinData bd = new CkBinData();
    prng.GenRandomBd(16,bd);

    //  Get the current date/time in a string with this format: 2010-06-08T07:26:50Z
    CkDateTime dt = new CkDateTime();
    dt.SetFromCurrentSystemTime();
    String created = dt.getAsTimestamp(false);
    bd.AppendString(created,"utf-8");

    //  This example wishes to calculate a password digest like this:
    //  Password_Digest = Base64 ( SHA-1 ( nonce + created + SHA-1(password) ) )

    //  First SHA-1 digest the password...
    String passwordSha1 = crypt.hashStringENC(password);
    //  Append the 20 binary bytes of the SHA1 hash to bd, which already contains the nonce and created date/time.
    bd.AppendEncoded(passwordSha1,"base64");

    String passwordDigest = crypt.hashBdENC(bd);

    Log.i(TAG, "Base64 password digest = " + passwordDigest);

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}