[CRYPTO] seqiv: Add Sequence Number IV Generator
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>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index c4b6c91..7ad9711 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -32,6 +32,14 @@
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_CTR
tristate "CTR support"
select CRYPTO_BLKCIPHER
+ select CRYPTO_SEQIV
select CRYPTO_MANAGER
help
CTR: Counter mode