Re: ArrayIndexOutOfBoundsException

I saw the same problem and solved it by allocating extra space in the output buffer;

Here is a useful code example I found:

byte[] output = new byte[aes.getOutputSize(plaintext.length)];

Tim.

> On 20 Nov 2018, at 07:01, lokesh kalal <[email protected]> wrote:
> 
> Hey guys ,
> Can anybody help me on this?
> 
> On Fri, Nov 16, 2018 at 10:41 AM lokesh kalal <[email protected]> wrote:
> Hi 
> I am using folllwing class to decrypt the various data packet in a loop.
> 
> public class Decryptor {
> 
> private Cipher aesDecryptCipher = null;
> 
> public byte[] Decrypt(byte[] data) {
> 		byte[] decryptedData = null;
> 		
> 		try {
> 			if (aesKeySpec == null)
> 				aesKeySpec = new SecretKeySpec(sessionKey, "AES");
> 			if (aesDecryptCipher == null) {
> 				aesDecryptCipher = Cipher.getInstance("AES", "BC");
> 				aesDecryptCipher.init(Cipher.DECRYPT_MODE, aesKeySpec);
> 			}
> 			decryptedData = aesDecryptCipher.doFinal(data);
> 			
> 		} catch (NoSuchAlgorithmException e) {
> 			Logger.d(tag, "NoSuchAlgorithmException: " + e.toString());
> 		} catch (NoSuchPaddingException e) {
> 			Logger.d(tag, "NoSuchPaddingException: " + e.toString());
> 		} catch (InvalidKeyException e) {
> 			Logger.d(tag, "InvalidKeyException: " + e.toString());
> 		} catch (IllegalBlockSizeException e) {
> 			Logger.d(tag, "IllegalBlockSizeException: " + e.toString());
> 		} catch (BadPaddingException e) {
> 			Logger.d(tag, "BadPaddingException: " + e.toString());
> 		} catch (NoSuchProviderException e) {
> 			Logger.d(tag, "aesDecrypt NoSuchProviderException: " + e.toString());
> 		} catch (IllegalStateException e) {
> 			Logger.e(tag, "aesDecrypt IllegalStateException: " + e.toString());
> 		}
> 		
> 		return decryptedData;
> 	}
> 
> }
> 
> On Thu, Nov 15, 2018 at 3:21 PM Eckenfels. Bernd <[email protected]> wrote:
> You need to provide us with a minimal code example on how you use the Cipher so we can help you. What methods do you call with which buffer length, what version is it, which cipher do you use, what do you want to achieve. It looks like you use doFinal(byte[], int) with a too short output buffer. Did you account for IV block, padding and AE Tag?
> 
> Gruss
> Bernd
> --
> http://www.seeburger.com
> ________________________________________
> From: lokesh kalal [[email protected]]
> Sent: Thursday, November 15, 2018 09:24
> To: [email protected]
> Subject: [dev-crypto] ArrayIndexOutOfBoundsException
> 
> Hi Guys ,
> Facing multiple crashes in my application.
> Is there somthing we can do to fix this?
> 
> Fatal Exception: java.lang.
> : src.length=208 srcPos=192 dst.length=16 dstPos=16 length=16
>        at java.lang.System.arraycopy(System.java:252)
>        at com.android.org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher.processBytes(PaddedBufferedBlockCipher.java:221)
>        at com.android.org.bouncycastle.jcajce.provider.symmetric.util.BaseBlockCipher$BufferedGenericBlockCipher.processBytes(BaseBlockCipher.java:1004)
>        at com.android.org.bouncycastle.jcajce.provider.symmetric.util.BaseBlockCipher.engineDoFinal(BaseBlockCipher.java:841)
>        at javax.crypto.Cipher.doFinal(Cipher.java:1340)
> 
> --
> Thanks & Regards,
> Lokesh Kalal
> 
> 
> 
> 
> 
> 
> 
> 
> 
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> 
> 
> -- 
> Thanks & Regards,
> Lokesh Kalal
> 
> 
> 
> -- 
> Thanks & Regards,
> Lokesh Kalal
>