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SECLIB-667: Accelerate SHA-256 with A64 crypto extensions

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Provide an additional pair of #defines, MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT
and MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY. At most one of them may be
specified. If used, it is necessary to compile with -march=armv8-a+crypto.

The MBEDTLS_SHA256_PROCESS_ALT and MBEDTLS_SHA256_ALT mechanisms
continue to work, and are mutually exclusive with A64_CRYPTO.

There should be minimal code size impact if no A64_CRYPTO option is set.

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
This commit is contained in:
Tom Cosgrove 2022-02-20 22:25:31 +00:00
parent 9b545c04f7
commit f3ebd90a1c
6 changed files with 364 additions and 11 deletions
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22
include/mbedtls/check_config.h
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@ -592,6 +592,28 @@
#error "MBEDTLS_SHA256_C defined without MBEDTLS_SHA224_C"
#endif
#if defined(MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT) && \
defined(MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY)
#error "Must only define one of MBEDTLS_SHA256_USE_A64_CRYPTO_*"
#endif
#if defined(MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT) || \
defined(MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY)
#if !defined(MBEDTLS_SHA256_C)
#error "MBEDTLS_SHA256_USE_A64_CRYPTO_* defined without MBEDTLS_SHA256_C"
#endif
#if defined(MBEDTLS_SHA256_ALT) || defined(MBEDTLS_SHA256_PROCESS_ALT)
#error "MBEDTLS_SHA256_*ALT can't be used with MBEDTLS_SHA256_USE_A64_CRYPTO_*"
#endif
#if defined(__aarch64__) && !defined(__ARM_FEATURE_CRYPTO)
#error "Must use minimum -march=armv8-a+crypto for MBEDTLS_SHA256_USE_A64_CRYPTO_*"
#endif
#endif
#if defined(MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY) && !defined(__aarch64__)
#error "MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY defined on non-Aarch64 system"
#endif
#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && ( !defined(MBEDTLS_SHA1_C) && \
!defined(MBEDTLS_SHA256_C) && !defined(MBEDTLS_SHA512_C) )
#error "MBEDTLS_SSL_PROTO_TLS1_2 defined, but not all prerequisites"