Re: using crypto_digest() on non-kmalloc'd memory failures

[James Morris]

On Tue, 19 Oct 2004, Oleg Makarenko wrote:

> And one more question on crypto api. It looks like it is not very 
> effective for a single byte "block" ciphers as arc4. The overhead is 
> probably too big. Just look at the loop in cipher.c/crypt() and the code 
> in arc4.c/arc4_crypt(). All this code is called for every single clear 
> text byte. Right? Looks like an overkill for bsize == 1.
> 
> Is there any better way to use crypto api for arc4 or similar ciphers? 
> Cipher block size is not always a natural choice for the crypto_yield(). 
> Especially for fast ciphers (arc4) and small "block" sizes (arc4 again).

ARC4 is a bit strange because it's a stream cipher.  I guess we could add 
another encryption mode 'stream' which is optimized for one byte at a time 
operation.


- James
-- 
James Morris
<jmorris@xxxxxxxxxx>


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