On Fri, Aug 16, 2024 at 02:43:57PM -0700, Raymond Mao wrote: > Smaller implementation for SHA256 and SHA512 helps to reduce the > ROM footprint though it has a certain impact on performance. > As a trade-off, enable it as a default config when MbedTLS is > enabled can reduce the target size significantly with acceptable > performace loss. > > Signed-off-by: Raymond Mao <raymond....@linaro.org> > --- > Changes in v6 > - Initial patch > > lib/mbedtls/Kconfig | 24 ++++++++++++++++++++++++ > lib/mbedtls/mbedtls_def_config.h | 6 ++++++ > 2 files changed, 30 insertions(+) > > diff --git a/lib/mbedtls/Kconfig b/lib/mbedtls/Kconfig > index 12f8c965f5a..0e22edf1b6c 100644 > --- a/lib/mbedtls/Kconfig > +++ b/lib/mbedtls/Kconfig > @@ -151,18 +151,42 @@ config SHA1_MBEDTLS > config SHA256_MBEDTLS > bool "Enable SHA256 support with MbedTLS crypto library" > depends on MBEDTLS_LIB_CRYPTO && SHA256 > + select SHA256_SMALLER > help > This option enables support of hashing using SHA256 algorithm > with MbedTLS crypto library. > > +if SHA256_MBEDTLS > + > +config SHA256_SMALLER > + bool "Enable SHA256 smaller implementation with MbedTLS crypto library" > + depends on SHA256_MBEDTLS > + help > + This option enables support of hashing using SHA256 algorithm > + smaller implementation with MbedTLS crypto library. > + > +endif
For each of these, they shouldn't be select'd, they just need to depends on the right option (SHA256_MBEDTLS, etc) and be default y. -- Tom
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