I am using the code for encryption and encryption. Its not giving the string result. The byte array is not converting to string. I tried everything almost to convert the byte array to char but its not giving the result.
public class EncryptionTest extends Activity {
EditText input, output, outputDecrypt;
String plain_text;
byte[] key, encrypted_bytes,keyStart,byte_char_text,decrpyted_bytes ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_encryption_test);
input = (EditText) findViewById(R.id.text_inputText);
output = (EditText) findViewById(R.id.text_Result);
outputDecrypt = (EditText) findViewById(R.id.text_decrypt_Result);
Button encrypt_btn = (Button) findViewById(R.id.btn_encrpyt);
Button decrypt_btn = (Button) findViewById(R.id.btn_Decrypt);
plain_text = input.getText().toString();
keyStart = "Supriyo".getBytes();
byte_char_text = plain_text.getBytes();
encrypt_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
try {
KeyGenerator keygen = KeyGenerator.getInstance("AES");
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
sr.setSeed(keyStart);
keygen.init(128, sr);
SecretKey skey = keygen.generateKey();
key = skey.getEncoded();
encrypted_bytes = encrypt(key, byte_char_text);
String inputResult = encrypted_bytes.toString();
output.setText(inputResult);
decrpyted_bytes = decrypt(key, encrypted_bytes);
System.out.println("decr"+Arrays.toString(decrpyted_bytes));
String outputResult = new String(decrpyted_bytes,"UTF-8");
System.out.println("-->>>"+outputResult);
outputDecrypt.setText(outputResult);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchPaddingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (BadPaddingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
public static byte[] decrypt(byte[] raw, byte[] encrypteds)
throws Exception {
SecretKeySpec skey = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, skey);
byte[] decrypted = cipher.doFinal(encrypteds);
return decrypted;
}
public static byte[] encrypt(byte[] raw, byte[] clear)
throws Exception{
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte encrypted[] = cipher.doFinal(clear);
return encrypted;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.encryption_test, menu);
return true;
}
}