Encryption using AES-128 in Android and IPhone (Different result)

Question

I am trying to encrypt some text using the AES algorithm on both the Android and IPhone platforms. My problem is, even using the same encryption/decryption algorithm (AES-12

Answer 1

For iPhone I used AESCrypt-ObjC, and for Android use this code:

public class AESCrypt {

  private final Cipher cipher;
  private final SecretKeySpec key;
  private AlgorithmParameterSpec spec;


  public AESCrypt(String password) throws Exception
  {
    // hash password with SHA-256 and crop the output to 128-bit for key
    MessageDigest digest = MessageDigest.getInstance("SHA-256");
    digest.update(password.getBytes("UTF-8"));
    byte[] keyBytes = new byte[32];
    System.arraycopy(digest.digest(), 0, keyBytes, 0, keyBytes.length);

    cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
    key = new SecretKeySpec(keyBytes, "AES");
    spec = getIV();
  }       

  public AlgorithmParameterSpec getIV()
  {
    byte[] iv = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, };
    IvParameterSpec ivParameterSpec;
    ivParameterSpec = new IvParameterSpec(iv);

    return ivParameterSpec;
  }

  public String encrypt(String plainText) throws Exception
  {
    cipher.init(Cipher.ENCRYPT_MODE, key, spec);
    byte[] encrypted = cipher.doFinal(plainText.getBytes("UTF-8"));
    String encryptedText = new String(Base64.encode(encrypted, Base64.DEFAULT), "UTF-8");

    return encryptedText;
  }

  public String decrypt(String cryptedText) throws Exception
  {
    cipher.init(Cipher.DECRYPT_MODE, key, spec);
    byte[] bytes = Base64.decode(cryptedText, Base64.DEFAULT);
    byte[] decrypted = cipher.doFinal(bytes);
    String decryptedText = new String(decrypted, "UTF-8");

    return decryptedText;
  }
}