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

Computing the hash for a file of any size.

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

    CkCrypt2 crypt = new CkCrypt2();

    // Any type of file may be hashed.
    // There is  no size limitation because the file is consumed
    // in streaming mode internally.
    String filename;
    filename = "something.zip";

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

    // Other possible EncodingMode settings are: 
    // "quoted-printable", "base64", "base32", and "url"

    String hash = crypt.hashFileENC(filename);
    Log.i(TAG, "SHA1:");
    Log.i(TAG, hash);

    // Hash using MD2
    crypt.put_HashAlgorithm("md2");
    hash = crypt.hashFileENC(filename);
    Log.i(TAG, "MD2:");
    Log.i(TAG, hash);

    // Hash using MD5
    crypt.put_HashAlgorithm("md5");
    hash = crypt.hashFileENC(filename);
    Log.i(TAG, "MD5:");
    Log.i(TAG, hash);

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

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

    // Hash using SHA-512
    crypt.put_HashAlgorithm("sha512");
    hash = crypt.hashFileENC(filename);
    Log.i(TAG, "SHA512:");
    Log.i(TAG, 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.hashFileENC(filename);
    Log.i(TAG, "Haval:");
    Log.i(TAG, hash);

  }

  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."
  }
}