Messages in this thread | | | Date | Fri, 23 Nov 2007 20:22:59 +0800 | From | Herbert Xu <> | Subject | Re: [PATCH 3/3] dm-crypt: Add support for stream ciphers using blkcipher interface |
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On Thu, Nov 22, 2007 at 05:38:12AM +0800, Tan Swee Heng wrote: > Current implementation of dm-crypt supports block ciphers of the form > "template(cipher)", e.g. "cbc(aes)". It does not support stream > ciphers of the form "cipher", e.g. "salsa20", that uses the blkcipher > interface directly. > > This patch adds support for stream ciphers using the blkcipher > interface directly. It uses a special chainmode called "stream". > Example of usage: > cryptsetup luksFormat -c salsa20-stream-plain /dev/loop0
I'd really like to have a new format altogether that does not involve dashes as a separator. The reason is that dash is used as a part of the name of certain algorithms.
Once dm-crypt starts using the givcrypt interface instead of its own IV generators, we can get away with just a single algorithm string, of the form
geniv(mode(block-cipher))
Obviously stream ciphers would just be
geniv(stream-cipher)
So when that happens we can just use the format "-string" as that's an invalid specification in the current format.
Of course we'd continue to support the current format as well which can coexist with the new format forever.
Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au> 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-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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