diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2019-11-08 13:22:32 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-11-17 09:02:43 +0800 |
| commit | 0ed42a6f431e930b2e8fae21955406e09fe75d70 (patch) | |
| tree | eff8cd4d432e1ba4788bf968b94a32f223b7f4dc /lib/crypto/Kconfig | |
| parent | ed0356eda153f6a95649e11feb7b07083caf9e20 (diff) | |
crypto: curve25519 - generic C library implementations
This contains two formally verified C implementations of the Curve25519
scalar multiplication function, one for 32-bit systems, and one for
64-bit systems whose compiler supports efficient 128-bit integer types.
Not only are these implementations formally verified, but they are also
the fastest available C implementations. They have been modified to be
friendly to kernel space and to be generally less horrendous looking,
but still an effort has been made to retain their formally verified
characteristic, and so the C might look slightly unidiomatic.
The 64-bit version comes from HACL*: https://github.com/project-everest/hacl-star
The 32-bit version comes from Fiat: https://github.com/mit-plv/fiat-crypto
Information: https://cr.yp.to/ecdh.html
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
[ardb: - move from lib/zinc to lib/crypto
- replace .c #includes with Kconfig based object selection
- drop simd handling and simplify support for per-arch versions ]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'lib/crypto/Kconfig')
| -rw-r--r-- | lib/crypto/Kconfig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig index 7ad98b624e55..b1d830dc1c9e 100644 --- a/lib/crypto/Kconfig +++ b/lib/crypto/Kconfig @@ -59,6 +59,31 @@ config CRYPTO_LIB_CHACHA by either the generic implementation or an arch-specific one, if one is available and enabled. +config CRYPTO_ARCH_HAVE_LIB_CURVE25519 + tristate + help + Declares whether the architecture provides an arch-specific + accelerated implementation of the Curve25519 library interface, + either builtin or as a module. + +config CRYPTO_LIB_CURVE25519_GENERIC + tristate + help + This symbol can be depended upon by arch implementations of the + Curve25519 library interface that require the generic code as a + fallback, e.g., for SIMD implementations. If no arch specific + implementation is enabled, this implementation serves the users + of CRYPTO_LIB_CURVE25519. + +config CRYPTO_LIB_CURVE25519 + tristate "Curve25519 scalar multiplication library" + depends on CRYPTO_ARCH_HAVE_LIB_CURVE25519 || !CRYPTO_ARCH_HAVE_LIB_CURVE25519 + select CRYPTO_LIB_CURVE25519_GENERIC if CRYPTO_ARCH_HAVE_LIB_CURVE25519=n + help + Enable the Curve25519 library interface. This interface may be + fulfilled by either the generic implementation or an arch-specific + one, if one is available and enabled. + config CRYPTO_LIB_DES tristate |