crypto: x86/chacha20 - add XChaCha20 support

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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>

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Eric Biggers 2018-12-04 22:20:02 -08:00 • committed by Herbert Xu

parent 0f961f9f67

commit 4af7826187

3 changed files with 141 additions and 60 deletions

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81

arch/x86/crypto/chacha20-ssse3-x86_64.S

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106

arch/x86/crypto/chacha20_glue.c

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12

crypto/Kconfig

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