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authorMartin Willi <martin@strongswan.org>2015-06-01 13:43:56 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2015-06-04 15:04:49 +0800
commitc08d0e647305c3f8f640010a56c9e4bafb9488d3 (patch)
treef6d862fda8608a41677ec721f5dc280a1899a320 /crypto/Kconfig
parentfb43f69401fef8ed2f72d7ea4a25910a0f2138bc (diff)
downloadlinux-stericsson-c08d0e647305c3f8f640010a56c9e4bafb9488d3.tar.gz
crypto: chacha20 - Add a generic ChaCha20 stream cipher implementation
ChaCha20 is a high speed 256-bit key size stream cipher algorithm designed by Daniel J. Bernstein. It is further specified in RFC7539 for use in IETF protocols as a building block for the ChaCha20-Poly1305 AEAD. This is a portable C implementation without any architecture specific optimizations. It uses a 16-byte IV, which includes the 12-byte ChaCha20 nonce prepended by the initial block counter. Some algorithms require an explicit counter value, for example the mentioned AEAD construction. Signed-off-by: Martin Willi <martin@strongswan.org> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
-rw-r--r--crypto/Kconfig13
1 files changed, 13 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index af011a96e97d..bf657becbb71 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1156,6 +1156,19 @@ config CRYPTO_SALSA20_X86_64
The Salsa20 stream cipher algorithm is designed by Daniel J.
Bernstein <djb@cr.yp.to>. See <http://cr.yp.to/snuffle.html>
+config CRYPTO_CHACHA20
+ tristate "ChaCha20 cipher algorithm"
+ select CRYPTO_BLKCIPHER
+ help
+ ChaCha20 cipher algorithm, RFC7539.
+
+ ChaCha20 is a 256-bit high-speed stream cipher designed by Daniel J.
+ Bernstein and further specified in RFC7539 for use in IETF protocols.
+ This is the portable C implementation of ChaCha20.
+
+ See also:
+ <http://cr.yp.to/chacha/chacha-20080128.pdf>
+
config CRYPTO_SEED
tristate "SEED cipher algorithm"
select CRYPTO_ALGAPI