There are a lot of threads on stack overflow with this topic, and always the same solutions, but these doesn't work for me. I am looking for a way to decrypt the value byte[] encrypted and return byte[] decodedBytes.
With the method AESCrypt. I use compile 'com.scottyab:aescrypt:0.0.1'
private void testAES() {
try {
final byte[] encrypted = Base64.decode("R3JhbmRlIFZpY3RvaXJlICE=", Base64.NO_WRAP);
byte[] keyBytes = Base64.decode("L/91ZYrliXvmhYt9FKEkkDDni+PzcnOuV9cikm188+4=", Base64.NO_WRAP);
final byte[] ivBytes = Base64.decode("gqjFHI+YQiP7XYEfcIEJHw==".getBytes(), Base64.NO_WRAP);
final SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");
byte[] decodedBytes = AESCrypt.decrypt(keySpec, ivBytes, encrypted);
} catch (Exception e) {
e.printStackTrace();
}
}
With the value Cipher, i use it like that.
private static byte[] testCipher() {
try {
final byte[] encrypted = Base64.decode("R3JhbmRlIFZpY3RvaXJlICE=", Base64.NO_WRAP);
byte[] keyBytes = Base64.decode("L/91ZYrliXvmhYt9FKEkkDDni+PzcnOuV9cikm188+4=", Base64.NO_WRAP);
byte[] ivBytes = Base64.decode("gqjFHI+YQiP7XYEfcIEJHw==".getBytes(), Base64.NO_WRAP);
final IvParameterSpec ivSpecForData = new IvParameterSpec(ivBytes);
SecretKeySpec decodedKeySpec = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, decodedKeySpec, ivSpecForData);
byte[] decodedBytes = cipher.doFinal(encrypted); // I have the error here //
return decodedBytes;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
Whatever i do, i allways have the same error :
error:1e06b07b:Cipher functions:EVP_DecryptFinal_ex:WRONG_FINAL_BLOCK_LENGTH
I try to put in Cipher.getInstance (AES/CBC/NoPadding, AES/CBC/PKCS5Padding, AES/CBC/PKCS7Padding) but nothing change. Do you have any idea to help me ?
