(Android™) Hash Algorithms: SHA-1, HAVAL, MD2, MD5, SHA-256, SHA-384, SHA-512

How to create hashes (message digests) for strings.

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.

    CkCrypt2 crypt = new CkCrypt2();

    String s = "The quick brown fox jumps over the lazy dog";

    crypt.put_HashAlgorithm("sha1");
    crypt.put_EncodingMode("hex");

    // Other possible EncodingMode settings are: 
    // "quoted-printable", "base64","url", and many more..

    String hash = crypt.hashStringENC(s);
    Log.i(TAG, "SHA1: " + hash);

    // Hash using MD2
    crypt.put_HashAlgorithm("md2");
    hash = crypt.hashStringENC(s);
    Log.i(TAG, "MD2: " + hash);

    // Hash using MD5
    crypt.put_HashAlgorithm("md5");
    hash = crypt.hashStringENC(s);
    Log.i(TAG, "MD5: " + hash);

    // Note: SHA-2 is a set of cryptographic hash functions (SHA-224, SHA-256, SHA-384, SHA-512)

    // Hash using SHA-256
    crypt.put_HashAlgorithm("sha256");
    hash = crypt.hashStringENC(s);
    Log.i(TAG, "SHA256: " + hash);

    // Hash using SHA-384
    crypt.put_HashAlgorithm("sha384");
    hash = crypt.hashStringENC(s);
    Log.i(TAG, "SHA384: " + hash);

    // Hash using SHA-512
    crypt.put_HashAlgorithm("sha512");
    hash = crypt.hashStringENC(s);
    Log.i(TAG, "SHA512: " + hash);

    // Hash using HAVAL
    // There are two additional properties relevant to HAVAL:
    // HavalRounds, and KeyLength.
    // HavalRounds can have values of 3, 4, or 5.
    // KeyLength can have values of 128, 160, 192, 224, or 256
    crypt.put_HashAlgorithm("haval");
    crypt.put_HavalRounds(5);
    crypt.put_KeyLength(256);
    hash = crypt.hashStringENC(s);
    Log.i(TAG, "Haval: " + hash);

    // Hashes for "The quick brown fox jumps over the lazy dog"

    // SHA1:
    // 2FD4E1C67A2D28FCED849EE1BB76E7391B93EB12

    // MD2:
    // 03D85A0D629D2C442E987525319FC471

    // MD5:
    // 9E107D9D372BB6826BD81D3542A419D6

    // SHA256:
    // D7A8FBB307D7809469CA9ABCB0082E4F8D5651E46D3CDB762D02D0BF37C9E592

    // SHA384:
    // CA737F1014A48F4C0B6DD43CB177B0AFD9E5169367544C494011E3317DBF9A509CB1E5DC1E85A941BBEE3D7F2AFBC9B1

    // SHA512:
    // 07E547D9586F6A73F73FBAC0435ED76951218FB7D0C8D788A309D785436BBB642E93A252A954F23912547D1E8A3B5ED6E1BFD7097821233FA0538F3DB854FEE6

    // Haval:
    // B89C551CDFE2E06DBD4CEA2BE1BC7D557416C58EBB4D07CBC94E49F710C55BE

  }

  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."
  }
}