libmbedtls: support mbedTLS in kernel mode

Initial step of mbedtls cryptos integration.
Directory created and interface file is drafted.
All function interfaces are set to "not supported".
The mbedt

libmbedtls: support mbedTLS in kernel mode

Initial step of mbedtls cryptos integration.
Directory created and interface file is drafted.
All function interfaces are set to "not supported".
The mbedtls can be selected by specifying build flags
"CFG_CRYPTOLIB_NAME=mbedtls" and "CFG_CRYPTOLIB_DIR=lib/libmbedtls"

Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Edison Ai <edison.ai@arm.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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ta: switch to to mbedtls for bignum

Adds tee_api_arith_mpi.c wrapper providing the TEE Arithmetical API around
the big (mpi) routines from mbedtls.

CFG_TA_MBEDTLS_MPI=y (default y) enables the usag

ta: switch to to mbedtls for bignum

Adds tee_api_arith_mpi.c wrapper providing the TEE Arithmetical API around
the big (mpi) routines from mbedtls.

CFG_TA_MBEDTLS_MPI=y (default y) enables the usage of the bignum routines
in libutee.

Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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core: mbedtls: configure bignum word size

Configures mbedtls bignum word size (mbedtls_mpi_uint and mbedtls_mpi_sint)
as 32-bit or 64-bit depending on arm architecture.

Reviewed-by: Jerome Forissie

core: mbedtls: configure bignum word size

Configures mbedtls bignum word size (mbedtls_mpi_uint and mbedtls_mpi_sint)
as 32-bit or 64-bit depending on arm architecture.

Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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core: switch to mbedtls for bignum

Adds a mpi_desc.c wrapper to LTC in order to enable usage of bignum
(mpi) routines from mbedtls.

CFG_MBEDTLS_MPI=y (default y) builds the bignum routines for mbed

core: switch to mbedtls for bignum

Adds a mpi_desc.c wrapper to LTC in order to enable usage of bignum
(mpi) routines from mbedtls.

CFG_MBEDTLS_MPI=y (default y) builds the bignum routines for mbedtls and
also enables their usage in LTC and by that replaces libmpa for
privileged mode usage.

User mode TAs still use libmpa.

Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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mbedtls_config_uta.h: enable check key usage

Defines MBEDTLS_X509_CHECK_KEY_USAGE to enable checking key usage of a
certificate.

Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-o

mbedtls_config_uta.h: enable check key usage

Defines MBEDTLS_X509_CHECK_KEY_USAGE to enable checking key usage of a
certificate.

Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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libmbedtls: configure and compile mbedtls

Configures mbedtls with a minimal user mode TA configuration and makes
it compile.

Adds dummy include/mbedtls_config_kernel.h to give a good error message

libmbedtls: configure and compile mbedtls

Configures mbedtls with a minimal user mode TA configuration and makes
it compile.

Adds dummy include/mbedtls_config_kernel.h to give a good error message
in case mbedTLS is compiled in for kernel mode.

mbedTLS is enabled for TAs with CFG_TA_MBEDTLS = y
Builtin self tests are enabled with CFG_TA_MBEDTLS_SELF_TEST = y

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

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