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[CRYPTO] seqiv: Add Sequence Number IV Generator

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This generator generates an IV based on a sequence number by xoring it
with a salt.  This algorithm is mainly useful for CTR and similar modes.

This patch also sets it as the default IV generator for ctr.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2007-11-30 21:38:37 +11:00
parent 45d44eb56a
commit 0a270321db
4 changed files with 198 additions and 0 deletions
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crypto/Kconfig
+9
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@@ -32,6 +32,14 @@ config CRYPTO_BLKCIPHER
tristate
select CRYPTO_ALGAPI
config CRYPTO_SEQIV
tristate "Sequence Number IV Generator"
select CRYPTO_BLKCIPHER
help
This IV generator generates an IV based on a sequence number by
xoring it with a salt. This algorithm is mainly useful for CTR
and similar modes.
config CRYPTO_HASH
tristate
select CRYPTO_ALGAPI
@@ -197,6 +205,7 @@ config CRYPTO_XTS
config CRYPTO_CTR
tristate "CTR support"
select CRYPTO_BLKCIPHER
select CRYPTO_SEQIV
select CRYPTO_MANAGER
help
CTR: Counter mode