package cordova.plugin.thisiswhatitis; import android.content.Context; import android.content.Intent; import org.apache.cordova.CallbackContext; import org.apache.cordova.CordovaArgs; import org.apache.cordova.CordovaPlugin; import org.json.JSONException; import org.json.JSONObject; import javax.crypto.Cipher; import android.app.KeyguardManager; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.content.Context; import android.util.Log; import android.util.Base64; import android.security.KeyPairGeneratorSpec; import android.os.Build; import android.content.Context; import android.util.Log; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import java.security.*; import java.math.BigInteger; import java.util.ArrayList; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.lang.StringBuffer; import java.util.Calendar; import javax.crypto.Cipher; import javax.crypto.CipherInputStream; import javax.crypto.CipherOutputStream; import javax.security.auth.x500.X500Principal; import android.security.keystore.KeyGenParameterSpec; import static android.os.Build.VERSION.SDK_INT; import android.security.keystore.KeyProperties; import javax.crypto.KeyGenerator; import android.util.Log; import javax.crypto.SecretKey; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.GCMParameterSpec; /** * This class echoes a string called from JavaScript. */ public class thisiswhatitis extends CordovaPlugin { Cipher cipher = null; @Override public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException { if (action.equals("set")) { String alias = args.getString(0); String input = args.getString(1); alias = alias + "thisisanpasswordusedforstoringthedatarequired"; this.set(alias, input, callbackContext); return true; } else if (action.equals("get")) { String alias = args.getString(0); alias = alias + "thisisanpasswordusedforstoringthedatarequired"; this.get(alias, callbackContext); return true; } else if (action.equals("delete")) { String alias = args.getString(0); alias = alias + "thisisanpasswordusedforstoringthedatarequired"; this.delete(alias, callbackContext); return true; } return false; } private void set(String alias, String input, CallbackContext callbackContext) { try { KeyStore keyStore = KeyStore.getInstance("AndroidKeyStore"); keyStore.load(null); Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding"); if (!keyStore.containsAlias(alias)) { if (SDK_INT < 23) { cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding"); Calendar start = Calendar.getInstance(); Calendar end = Calendar.getInstance(); end.add(Calendar.YEAR, 2); KeyPairGeneratorSpec spec = new KeyPairGeneratorSpec.Builder(getContext()) .setAlias(alias) .setSubject(new X500Principal(String.format("CN=%s, O=%s", "Bower", "com.android.keystore.com"))) .setSerialNumber(BigInteger.ONE) .setStartDate(start.getTime()) .setEndDate(end.getTime()) .build(); KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "AndroidKeyStore"); generator.initialize(spec); KeyPair keyPair = generator.generateKeyPair(); PublicKey publicKey = keyStore.getCertificate(alias).getPublicKey(); cipher.init(Cipher.ENCRYPT_MODE, publicKey); } else if (SDK_INT >= 23) { cipher = Cipher.getInstance("AES/GCM/NoPadding"); KeyGenerator keyGenerator = KeyGenerator.getInstance( KeyProperties.KEY_ALGORITHM_AES, "AndroidKeyStore"); keyGenerator.init( new KeyGenParameterSpec.Builder(alias, KeyProperties.PURPOSE_ENCRYPT | KeyProperties.PURPOSE_DECRYPT) .setBlockModes(KeyProperties.BLOCK_MODE_GCM) .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE) .build()); keyGenerator.generateKey(); cipher.init(Cipher.ENCRYPT_MODE, keyGenerator.generateKey() ); byte[] encryptionIv = cipher.getIV(); SharedPreferences.Editor editor = getContext().getSharedPreferences("com.save.e",0).edit(); editor.putString("encryptionIv", Base64.encodeToString(encryptionIv, Base64.DEFAULT)); editor.apply(); } ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); CipherOutputStream cipherOutputStream = new CipherOutputStream( outputStream, cipher); cipherOutputStream.write(input.getBytes("UTF-8")); cipherOutputStream.close(); byte[] vals = outputStream.toByteArray(); this.write(vals, callbackContext); callbackContext.success("Success"); } } catch (Exception e) { callbackContext.error(e.getMessage()); } } public void write(byte[] vals, CallbackContext callbackContext) { try { SharedPreferences pref = getContext().getSharedPreferences("com.save",0); Editor editor = pref.edit(); editor.putString("npcorbower", Base64.encodeToString(vals, 0)); editor.commit(); // FileOutputStream fileStream = context.openFileOutput("npcorbower.sdat", context.MODE_PRIVATE); // fileStream.write(vals); // fileStream.close(); } catch (Exception e) { callbackContext.error(e.getMessage()); } } private void get(String alias, CallbackContext callbackContext) { try { KeyStore keyStore = KeyStore.getInstance("AndroidKeyStore"); keyStore.load(null); if (SDK_INT < 23) { cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding"); PrivateKey privateKey = (PrivateKey) keyStore.getKey(alias, null); cipher.init(Cipher.DECRYPT_MODE, privateKey); } else if (SDK_INT >= 23) { cipher = Cipher.getInstance("AES/GCM/NoPadding"); SharedPreferences pref = getContext().getSharedPreferences("com.save.e",0); String base64EncryptionIv = pref.getString("encryptionIv", null); byte[] encryptionIv = Base64.decode(base64EncryptionIv, Base64.DEFAULT); SecretKey key = (SecretKey) keyStore.getKey(alias, null); cipher.init(Cipher.DECRYPT_MODE, key, new GCMParameterSpec(16*8,encryptionIv) ); } CipherInputStream cipherInputStream = new CipherInputStream( new ByteArrayInputStream(this.read(callbackContext)), cipher); ArrayList values = new ArrayList(); int nextByte; while ((nextByte = cipherInputStream.read()) != -1) { values.add((byte)nextByte); } byte[] bytes = new byte[values.size()]; for(int i = 0; i < bytes.length; i++) { bytes[i] = values.get(i).byteValue(); } String value = new String(bytes, 0, bytes.length, "UTF-8"); callbackContext.success(value); } catch (Exception e){ callbackContext.error(e.getMessage()); } } public byte[] read(CallbackContext callbackContext) { try { SharedPreferences pref = getContext().getSharedPreferences("com.save",0); String value = pref.getString("npcorbower", null); byte[] encryptedText = Base64.decode(value.getBytes(), Base64.DEFAULT); // FileInputStream fileStream = context.openFileInput("npcorbower.sdat"); // byte[] buffer = new byte[8192]; // int bytesRead; // ByteArrayOutputStream byteStream = new ByteArrayOutputStream(); // while ((bytesRead = fileStream.read(buffer)) != -1) { // byteStream.write(buffer, 0, bytesRead); // } // byte[] encryptedText = byteStream.toByteArray(); // fileStream.close(); return encryptedText; } catch (Exception e) { callbackContext.error(e.getMessage());; return new byte[0]; } } private void delete(String alias, CallbackContext callbackContext) { try { KeyStore keyStore = KeyStore.getInstance("AndroidKeyStore"); keyStore.load(null); keyStore.deleteEntry(alias); this.remove(callbackContext); callbackContext.success("Success"); } catch (Exception e){ callbackContext.error(e.getMessage()); } } public void remove(CallbackContext callbackContext) { try { SharedPreferences pref = getContext().getSharedPreferences("com.save",0); Editor editor = pref.edit(); editor.remove("npcorbower"); editor.commit(); // context.deleteFile("npcorbower.sdat"); } catch (Exception e) { callbackContext.error(e.getMessage()); } } private Context getContext() { return cordova.getActivity().getApplicationContext(); } }