On Mon, Sep 24, 2007 at 07:31:32PM -0500, Joy Latten wrote: > > I have another question regarding this change to using a tuple. > The size of my counter is now, csize = blocksize - (noncesize + ivsize). > rfc 3686 (CTR-AES for ESP) states in section 4, that the counter > portion of the counter block be a 32-bit big endian. To keep > code endian-neutral as I can, would it be appropriate if I only did > this when my csize is 2, 4 or 8 bytes so I can easily use be16_to_cpu(), > be32_to_cpu() and be64_to_cpu() respectively? And for all other > sizes for csize, don't worry about this "endian" requirement, just store as is. > Does it matter that I store the 32 bits as big endian? Just fail the algorithm construction if the the counter block size doesn't come out to be 4 for now. We can change this later on when needs arise. Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt - To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
