tree 6013fcbd4c774b15033d09b67dfa7320ec22bc3a
parent 0f961f9f670e7c07690bfde2f533b93c653569cc
author Eric Biggers <ebiggers@google.com> 1543990802 -0800
committer Herbert Xu <herbert@gondor.apana.org.au> 1544696697 +0800

crypto: x86/chacha20 - add XChaCha20 support

Add an XChaCha20 implementation that is hooked up to the x86_64 SIMD
implementations of ChaCha20.  This can be used by Adiantum.

An SSSE3 implementation of single-block HChaCha20 is also added so that
XChaCha20 can use it rather than the generic implementation.  This
required refactoring the ChaCha permutation into its own function.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>