Hold mutex for the entirety of the call.
We are writing to storage and writing to the slot state here.
If we didn't keep the mutex for the whole duration then we may end up with
another thread seeing that a persistent key is in storage before
our slot is set to FULL; this would be unlinearizable behaviour.
Signed-off-by: Ryan Everett <ryan.everett@arm.com>
Everything needs to be done under the mutex here, we operate directly on FULL/EMPTY
slots, and we can't let key_slots_initialized change before we operate on slots.
Refactor to use an exit label.
Signed-off-by: Ryan Everett <ryan.everett@arm.com>
Call unconditionally the CCS writing function
when sending a CCS may be necessary in the
course of an handshake. Enforce in the writing
function and only in the writing function that
only one CCS is sent.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This saves ~160 bytes of code size, at the cost of a bit of localized
complexity in the code. The impact on performance is measurable but small
(<5% observed on x86_64) and can go either way (there's a calculation vs
memory bandwidth compromise).
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Implement mbedtls_pk_import_into_psa for all PK types except RSA_ALT.
This covers importing a key pair, importing a public key and importing
the public part of a key pair.
Test mbedtls_pk_import_into_psa() with the output of
mbedtls_pk_get_psa_attributes(). Also unit-test mbedtls_pk_import_into_psa()
on its own to get extra coverage, mostly for negative cases.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
... on MAC functions where the label was only added
due to the modifications required by this PR.
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
...on hash functions where the label was only added
due to the modifications required by this PR.
Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
Add non-regression tests. Update some test functions to not assume that
byte_length == bit_length / 8.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
ctx->buflen now returns the amount of valid data in ctx->buf.
Unencrypted buffers were already ok, but encrypted ones were
used to return the length of the encrypted buffer, not the
unencrypted one.
This commit fix this behavior for encrypted buffers.
Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
