Currently just replacing existing uses, but the real point of having
these conditions as a single macro is that we'll be able to use them in
tests case dependencies, see next commit.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Strategy for dependencies inside libmbecrypto, in particular in the PSA
Crypto core, are outside the scope of the present study.
Note: PR 6065, referenced in a few places, is the one that also
introduces the present commit. It kicks of the work towards G5 in parts
of the code governed by MBEDTLS_USE_PSA_CRYPTO.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
- lack of support for PSA_CRYPTO_CONFIG is not really a reason not to
enable MBEDTLS_USE_PSA_CRYPTO by default - while it's true that
currently X.509/TLS do not behave as expected when PSA_CRYPTO_CONFIG and
MBEDTLS_USE_PSA_CRYPTO are both enabled, it's no worse than when
MBEDTLS_USE_PSA_CRYPTO is disabled.
- as a consequence of removing the paragraph mentioned above, the
sub-section about PSA_CRYPTO_CONFIG no longer belongs in the
"compile-time option" section. Also, it's superseded by the study work
that happened in the meantime (of which this PR is part). So let's
remove it, and the new commit will add something more up-to-date
instead.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Not related to the changes in this PR, except in the next commit I'll
update the strategy document for changes in this PR and to outline
likely follow-ups, and while looking at the document I noticed a few
things that needed updated, so here there are in their own commit.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Note: limitations of opaque PSKs changed from "TLS 1.2 only" to "none"
since TLS 1.3 does not support PSK at all so far, and it is expected to
support opaque PSKs as soon as it gains PSK support, it will be just a
matter of selecting between psa_key_derivation_input_bytes() and
psa_key_derivation_input_key() - and testing obviously.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
The scope of the option has been expanded, now it makes more sense to
describe it as "everything except ...".
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
It was initially motivated by the fact that the PSA Crypto APIs
themselves were not stable. In the meantime, PSA Crypto has reached
1.0.0 so this no longer applies.
If we want user to be able to fully benefit from PSA in order to
isolate long-term secrets, they need to be able to use the new APIs with
confidence. There is no reason to think those APIs are any more likely
to change than any of our other APIs, and if they do, we'll follow the
normal process (deprecated in favour of a new variant).
For reference, the APIs in question are:
mbedtls_pk_setup_opaque() // to use PSA-held ECDSA/RSA keys in TLS
mbedtls_ssl_conf_psk_opaque() // for PSA-held PSKs in TLS
mbedtls_ssl_set_hs_psk_opaque() // for PSA-held PSKs in TLS
mbedtls_cipher_setup_psa() (deprecated in 3.2)
mbedtls_pk_wrap_as_opaque() (documented internal, to be removed in 3.2)
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
- misc updates about on-going/recent work
- removal of the section about mixed-PSK: being done in #5762
- clarifications in some places
- some typo fixes
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
We hadn't updated the storage specification in a while. There have been no
changes to the storage layout, but the details of the contents of some
fields have changed.
Since this is now a de facto stable format (unchanged between 2.25 and 3.2),
describe it fully, avoiding references to previous versions.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Also have check_config.h enforce this. And MBEDTLS_SSL_EXPORT_KEYS has been removed,
so no longer mention it.
Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
