Re: AES in M2Crypto advice

On Saturday 31 May 2003 01:36 pm, Jason H. Smith wrote:
> Thus far, I am basically using this procedure:

That doesn't work because the length of the output of the AES function 
will always be greater than the length of the input, since the algorithm 
allows any size input.  In the last block, it is presumably storing extra 
metadata that tells itself what to truncate on decryption.  So, each 
iteration of my procedure will throw in extra data.  Using aes_128_cbc, 
my output image should be at most 16 bytes larger than the hard drive.

So how can I use M2Crypto AES to encrypt something which is many gigabytes 
in size?

Thanks.

-- 
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http://www.ece.utexas.edu/~jhs/public_key.gpg

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