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Merge pull request #5547 from tom-cosgrove-arm/seclib-667-sha256-acceleration-mbedtls-internal

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SECLIB-667: Accelerate SHA-256 with A64 crypto extensions
This commit is contained in:
Dave Rodgman
2022-03-14 12:57:37 +00:00
committed by GitHub
parent c11bffe989 7e7aba8c9d
commit 868d38f50f
6 changed files with 380 additions and 11 deletions
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23
include/mbedtls/check_config.h
View File

@ -613,6 +613,29 @@
#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__) && !defined(_M_ARM64)
#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"

50
include/mbedtls/mbedtls_config.h
View File

@ -2759,6 +2759,56 @@
*/
#define MBEDTLS_SHA256_C
/**
* \def MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT
*
* Enable acceleration of the SHA-256 cryptographic hash algorithm with the
* Arm A64 cryptographic extensions if they are available at runtime. If not,
* it will fall back to the C implementation.
*
* \note If MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT is defined when building
* for a non-Aarch64 build it will be silently ignored.
*
* \note The code uses Neon intrinsics, so \c CFLAGS must be set to a minimum
* of \c -march=armv8-a+crypto.
*
* \warning MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT cannot be defined at the
* same time as MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY.
*
* Requires: MBEDTLS_SHA256_C.
*
* Module: library/sha256.c
*
* Uncomment to have the library check for the A64 SHA-256 crypto extensions
* and use them if available.
*/
//#define MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT
/**
* \def MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY
*
* Enable acceleration of the SHA-256 cryptographic hash algorithm with the
* Arm A64 cryptographic extensions, which must be available at runtime (or
* an illegal instruction fault will occur).
*
* \note This allows builds with a smaller code size than with
* MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT
*
* \note The code uses Neon intrinsics, so \c CFLAGS must be set to a minimum
* of \c -march=armv8-a+crypto.
*
* \warning MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY cannot be defined at the same
* time as MBEDTLS_SHA256_USE_A64_CRYPTO_IF_PRESENT.
*
* Requires: MBEDTLS_SHA256_C.
*
* Module: library/sha256.c
*
* Uncomment to have the library use the A64 SHA-256 crypto extensions
* unconditionally.
*/
//#define MBEDTLS_SHA256_USE_A64_CRYPTO_ONLY
/**
* \def MBEDTLS_SHA384_C
*