Java Development

[swap_chau]

Hi All,

I have to use AESEncryptorEngine.encrypt() to encrypt data using AES algo. But the whenever I try that, BB throws IllegalArgumentException. There is no detailed message in the exception nor the stacktrace. 

I have seen examples where CBCEncryptorEngine &/or PKCS5FormatterEngine being used along with AESEncryptorEngine. This works fine, but I need to use only AES and no padding.

What is the wrokaround for this?

Can you suggest me some Third party encryption library. I tried J2Me version of Bouncy Castle, it is not getting compiled in BB.

Thanks.

[peter_strange]

Can you share the code so we see what you are actually providing the method?

have you tried any sample code and compared with your code?

[swap_chau]

Thanks for reply.

Please find my code below:

private void a() {
		byte[] key1 = {(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32, (byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03,
				(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32, (byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03};
		AESKey aesKey = new AESKey(key1);//new AESKey(256);
		try {
			AESEncryptorEngine aesEngine = new AESEncryptorEngine(aesKey);
			byte[] output = new byte[5];
			byte[] input = "Hello".getBytes();
			aesEngine.encrypt(input, 0, output, 0);
			String string = new String(output);
			LabelField lblField = new LabelField(string);
			add(lblField);
		} catch (CryptoTokenException e) {
			e.printStackTrace();
		} catch (CryptoUnsupportedOperationException e) {
			e.printStackTrace();
		}
	}

Whichever codes I looked for, had padding in it, and they work fine, but I need code without padding.

[peter_strange · Accepted solution]

I think the problem here is the plainText and cipherText have to match the block length for the algorithm.  So make these both 16 bytes and give this another try. 

[swap_chau]

Yes that worked. Thanks a lot.