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Java string encryption

I use the encryption class in Objective-C for my iPhone application, but I'm struggling to get the same functionality as JAVA from my Android application. My encryption code is below:

NSString * _secret = @"password";
NSString * _key = @"1428324560542678";

StringEncryption *crypto = [[StringEncryption alloc] init];
NSData *_secretData = [_secret dataUsingEncoding:NSUTF8StringEncoding];
CCOptions padding = kCCOptionPKCS7Padding;
NSData *encryptedData = [crypto encrypt:_secretData key:[_key dataUsingEncoding:NSUTF8StringEncoding] padding:&padding];

I tried to replicate it in JAVA, but I get a different line when I encode the same data. Therefore, I am doing something wrong, but I cannot understand it. Here is my JAVA code:

byte[] key = "1428324560542678".getBytes();

Cipher c = null;
            try {
                c = Cipher.getInstance("AES/ECB/PKCS7Padding");
            } catch (NoSuchAlgorithmException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

SecretKeySpec k =  new SecretKeySpec(key, "AES");
            try {
                c.init(Cipher.ENCRYPT_MODE, k);
            } catch (InvalidKeyException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

    try {
        EditText tv1passwordText = (EditText) findViewById(R.id.password);
        String password = URLEncoder.encode(tv1passwordText.getText().toString(), "UTF-8");

            byte[] encryptedData = c.doFinal( password.getBytes());

Can anyone see where I'm wrong?

Based on the comments below, I added getBytes, but the lines created are still different:

byte[] key = null;
            try {
                key = "1428324560542678".getBytes("UTF-8");
            } catch (UnsupportedEncodingException e2) {
                // TODO Auto-generated catch block
                e2.printStackTrace();
            }

            Cipher c = null;
            try {
                c = Cipher.getInstance("AES/ECB/PKCS7Padding");
            } catch (NoSuchAlgorithmException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            SecretKeySpec k =  new SecretKeySpec(key, "AES");
            try {
                c.init(Cipher.ENCRYPT_MODE, k);
            } catch (InvalidKeyException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            try {
                EditText tv1passwordText = (EditText) findViewById(R.id.password);

                byte[] password = tv1passwordText.getText().toString().getBytes("UTF-8");

                byte[] encryptedData = c.doFinal(password);
+5
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3 answers

Here is an example of encryption and decryption:

public static SecretKey generateKey() throws NoSuchAlgorithmException, InvalidKeySpecException {
    return secret = new SecretKeySpec(password.getBytes(), "AES");
}

public static byte[] encryptMsg(String message, SecretKey secret) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidParameterSpecException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
/* Encrypt the message. */
    Cipher cipher = null;
    cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, secret);
    byte[] cipherText = cipher.doFinal(message.getBytes("UTF-8"));
    return cipherText;
}

public static String decryptMsg(byte[] cipherText, SecretKey secret) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidParameterSpecException, InvalidAlgorithmParameterException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, UnsupportedEncodingException {

    /* Decrypt the message, given derived encContentValues and initialization vector. */
    Cipher cipher = null;
    cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
   cipher.init(Cipher.DECRYPT_MODE, secret);
    String decryptString = new String(cipher.doFinal(cipherText), "UTF-8");
    return decryptString;
}

To encrypt:

    SecretKey secret = EncUtil.generateKey();
    EncUtil.encryptMsg(<String to Encrypt>, secret))

for decryption

    EncUtil.decryptMsg(<byte[]>, secret))
+7
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, , CBC CTR. .

, Objective-C UTF-8, Java-. getBytes("UTF-8").

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In addition, a step URLEncoderin java can introduce additional control characters and other things that are not present on the iOS side. It might be worth comparing the text after that with the text going to the iOS encryption step to make sure they are exactly the same.

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