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3 Commits

Author SHA1 Message Date
Herbert Xu
f13ba2f7d3 [CRYPTO] skcipher: Fix section mismatches 
The previous patch to move chainiv and eseqiv into blkcipher created
a section mismatch for the chainiv exit function which was also called
from __init.  This patch removes the __exit marking on it.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
 2008-03-08 20:29:43 +08:00
Herbert Xu
76fc60a2e3 [CRYPTO] skcipher: Move chainiv/seqiv into crypto_blkcipher module 
For compatibility with dm-crypt initramfs setups it is useful to merge
chainiv/seqiv into the crypto_blkcipher module.  Since they're required
by most algorithms anyway this is an acceptable trade-off.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
 2008-02-23 11:12:06 +08:00
Herbert Xu
806d183aa6 [CRYPTO] eseqiv: Add Encrypted Sequence Number IV Generator 
This generator generates an IV based on a sequence number by xoring it
with a salt and then encrypting it with the same key as used to encrypt
the plain text.  This algorithm requires that the block size be equal
to the IV size.  It is mainly useful for CBC.

It has one noteworthy property that for IPsec the IV happens to lie
just before the plain text so the IV generation simply increases the
number of encrypted blocks by one.  Therefore the cost of this generator
is entirely dependent on the speed of the underlying cipher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
 2008-01-11 08:16:45 +11:00