Commit a10f554f authored by Herbert Xu's avatar Herbert Xu

crypto: echainiv - Add encrypted chain IV generator

This patch adds a new AEAD IV generator echainiv.  It is intended
to replace the existing skcipher IV generator eseqiv.

If the underlying AEAD algorithm is using the old AEAD interface,
then echainiv will simply use its IV generator.

Otherwise, echainiv will encrypt a counter just like eseqiv but
it'll first xor it against a previously stored IV similar to
chainiv.
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 3c08fee7
......@@ -227,6 +227,16 @@ config CRYPTO_SEQIV
This IV generator generates an IV based on a sequence number by
xoring it with a salt. This algorithm is mainly useful for CTR
config CRYPTO_ECHAINIV
tristate "Encrypted Chain IV Generator"
select CRYPTO_AEAD
select CRYPTO_NULL
select CRYPTO_RNG
help
This IV generator generates an IV based on the encryption of
a sequence number xored with a salt. This is the default
algorithm for CBC.
comment "Block modes"
config CRYPTO_CBC
......
......@@ -21,6 +21,7 @@ obj-$(CONFIG_CRYPTO_BLKCIPHER2) += crypto_blkcipher.o
obj-$(CONFIG_CRYPTO_BLKCIPHER2) += chainiv.o
obj-$(CONFIG_CRYPTO_BLKCIPHER2) += eseqiv.o
obj-$(CONFIG_CRYPTO_SEQIV) += seqiv.o
obj-$(CONFIG_CRYPTO_ECHAINIV) += echainiv.o
crypto_hash-y += ahash.o
crypto_hash-y += shash.o
......
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