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3 Commits

Author SHA1 Message Date
Martin Willi
2546f811ef crypto: poly1305 - Export common Poly1305 helpers 
As architecture specific drivers need a software fallback, export Poly1305
init/update/final functions together with some helpers in a header file.

Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
 2015-07-17 21:20:26 +08:00
Martin Willi
c2b7b20aed crypto: poly1305 - Pass key as first two message blocks to each desc_ctx 
The Poly1305 authenticator requires a unique key for each generated tag. This
implies that we can't set the key per tfm, as multiple users set individual
keys. Instead we pass a desc specific key as the first two blocks of the
message to authenticate in update().

Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
 2015-06-17 15:35:11 +08:00
Martin Willi
f979e014c5 crypto: poly1305 - Add a generic Poly1305 authenticator implementation 
Poly1305 is a fast message authenticator designed by Daniel J. Bernstein.
It is further defined in RFC7539 as a building block for the ChaCha20-Poly1305
AEAD for use in IETF protocols.

This is a portable C implementation of the algorithm without architecture
specific optimizations, based on public domain code by Daniel J. Bernstein and
Andrew Moon.

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>
 2015-06-04 15:04:50 +08:00