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author | Martin Willi <martin@strongswan.org> | 2015-06-01 13:43:56 +0200 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-06-04 15:04:49 +0800 |
commit | e4a6db70d12f8a57c8d0cbf99894463458882f9e (patch) | |
tree | 5f0a535fbff6d2c7d36e586d789e6051bde8e6c5 /crypto/xcbc.c | |
parent | 0cf71a16fe0e984647c56ce9177522dfc4ebaff7 (diff) | |
download | linux-crypto-e4a6db70d12f8a57c8d0cbf99894463458882f9e.tar.gz linux-crypto-e4a6db70d12f8a57c8d0cbf99894463458882f9e.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/xcbc.c')
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