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Instead of providing crypto_shash algorithms for the arch-optimized
SHA-256 code, instead implement the SHA-256 library. This is much
simpler, it makes the SHA-256 library functions be arch-optimized, and
it fixes the longstanding issue where the arch-optimized SHA-256 was
disabled by default. SHA-256 still remains available through
crypto_shash, but individual architectures no longer need to handle it.
Remove support for SHA-256 finalization from the ARMv8 CE assembly code,
since the library does not yet support architecture-specific overrides
of the finalization. (Support for that has been omitted for now, for
simplicity and because usually it isn't performance-critical.)
To match sha256_blocks_arch(), change the type of the nblocks parameter
of the assembly functions from int or 'unsigned int' to size_t. Update
the ARMv8 CE assembly function accordingly. The scalar and NEON
assembly functions actually already treated it as size_t.
While renaming the assembly files, also fix the naming quirks where
"sha2" meant sha256, and "sha512" meant both sha256 and sha512.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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