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List:       bouncycastle-crypto-dev
Subject:    RE: [dev-crypto] Exception during decryption...
From:       "Venkataraman Sivasankaran (vsivasan)" <vsivasan () cisco ! com>
Date:       2008-06-26 0:18:52
Message-ID: EEC54FBC32B60F4E90B453EAD6A7232F06474B25 () xmb-sjc-217 ! amer ! cisco ! com
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Hi David,

Thanks. We troubleshooted and the problem was with a faulty algorithm
that did the intermediate packaging (splitting and joining) of large
files.

Regards,
Venkat

-----Original Message-----
From: David Hook [mailto:dgh@lockboxlabs.com] 
Sent: Wednesday, June 25, 2008 5:11 PM
To: Venkataraman Sivasankaran (vsivasan)
Cc: dev-crypto@bouncycastle.org; Chuck Rossi (chuckr)
Subject: Re: [dev-crypto] Exception during decryption...


The only likely cause of this is that the data stream is truncated. 

Having said that, you'd also see this if someone was inadvertently
sharing the cipher object between threads - the fact this is
intermittent suggests that would be a good place to look as well.

Regards,

David

On Wed, 2008-06-25 at 11:36 -0700, Venkataraman Sivasankaran (vsivasan)
wrote:
> Hi,
>  
> When decrypting large files, we are seeing this exception sometimes.
>  
> javax.crypto.IllegalBlockSizeException: last block incomplete in 
> decryption  at 
> org.bouncycastle.jce.provider.JCEBlockCipher.engineDoFinal(Unknown
> Source)
>  at javax.crypto.Cipher.doFinal(DashoA12275)
> ...
> ...
>  
> We are using:
>  
> AES with PKCS5Padding for data encryption and  RSA with PKCS1PADDING 
> for key encryption.
>  
> Any help on this?
>  
> thanks in advance.
>  
> Venkat



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