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| author | Martin Willi <martin@strongswan.org> | 2015-06-01 13:43:56 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-06-04 15:04:49 +0800 |
| commit | c08d0e647305c3f8f640010a56c9e4bafb9488d3 (patch) | |
| tree | f6d862fda8608a41677ec721f5dc280a1899a320 /crypto/Kconfig | |
| parent | fb43f69401fef8ed2f72d7ea4a25910a0f2138bc (diff) | |
| download | lwn-c08d0e647305c3f8f640010a56c9e4bafb9488d3.tar.gz lwn-c08d0e647305c3f8f640010a56c9e4bafb9488d3.zip | |
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/Kconfig | 13 |
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 |