Hello list, I'm currently implementing the blockcipher mode ABL. It allows turning a cipher with 128 bit blocks into a blockcipher with eg. 512, 4k etc blocks. It is specified in: http://grouper.ieee.org/groups/1619/email/rtf00000.rtf (October 28, 2004) http://grouper.ieee.org/groups/1619/email/pdf00005.pdf (April 15 2004) by David McGrew and John Viega. I'm working with David to generate official test vectors. A new specification is forthcoming in January. This mode needs a certain IV, this IV is called bewbi (big endian wide block count) (analogous with benbi, the narrow block count, which is in the current Linus tree). It is implemented in the first patch. The second patch introduces an optional argument to dm-crypt; the 'extra sector size shift'. Data is transferred to and from the crypto layer in chunks 512 bytes by default, the patch allows the user to enlarge this size by factors of 2 up to and including PAGE_SIZE. This is useful for deniable encryption. I don't really understand the internals of dm-crypt so I don't know if my implementation is correct. (although it seems to work for me). The patches are against the current cryptodev-2.6 tree. I didn't include the patch that introduces ABL itself, you can find it at http://cube.dyndns.org/~rsnel/abl/20061223-cryptodev-2.6/. If there are no objections or comments the dm-crypt changes will probably go into cryptodev-2.6. Greetings, Rik. --------------------------------------------------------------------- dm-crypt mailing list - http://www.saout.de/misc/dm-crypt/ To unsubscribe, e-mail: dm-crypt-unsubscribe@xxxxxxxx For additional commands, e-mail: dm-crypt-help@xxxxxxxx
