PSA_WANT_xxx is useful regardless of how the symbols are defined:
explicitly (with MBEDTLS_PSA_CRYPTO_CONFIG) or implicitly (without
MBEDTLS_PSA_CRYPTO_CONFIG).
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Without MBEDTLS_PSA_CRYPTO_CONFIG, PSA_WANT_xxx needs to be defined,
for the sake of code that calls the PSA API (TLS code, tests, sample
apps).
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Proposed specification for conditional inclusion of cryptographic
mechanism through the PSA API in Mbed TLS.
The inclusion of a mechanism is based on a declaration of boolean
symbols by the application. There is a symbol for each key type or
parametrized key type constructor, and for each algorithm or
parametrized algorithm constructor.
This is work in progress, presented for a first design discussion.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Locations aren't in the official PSA API specification yet (they've
only be made public in Mbed TLS). Until version 1.0.1 of the API
specification is out, this document needs to explain locations.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Rather than have some functions take the in-memory copy of the
persistent data as argument, allow all of them to access the
persistent data, including modifying it.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Opaque drivers only have a destroy function if the key is stored in
the secure element.
Expand on how key creation works. Provide more explanations of
allocate_key in drivers for secure elements with storage. Discuss key
destruction as well.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Call the functions listed in the driver description "entry points".
It's more precise than "functions", which could also mean any C
function defined in the driver code.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Driver developer's guide: introduction on how to write a driver.
Driver integration guide: how to build Mbed TLS with drivers.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Working draft of the PSA cryptography unified interface specification.
Eventually this document will be under Arm PSA architecture ownership,
but for the time being this draft is maintained in Mbed TLS.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Rename PSA_ECC_CURVE_xxx to PSA_ECC_FAMILY_xxx, also rename
PSA_KEY_TYPE_GET_CURVE to PSA_KEY_TYPE_ECC_GET_FAMILY and rename
psa_ecc_curve_t to psa_ecc_family_t. Old defines are provided in
include/crypto_compat.h for backward compatibility.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Clarify that using a header in library/ rather than include/ for
internal functions is a rule, not just a possibility.
As suggested by Manuel, state a rule for functions that need to be
static for best optimization but that we want to unit-test.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
