This algorithm is used for example by the Thread 1.1.1 specification,
which is not public but can be obtained free of charge at
https://www.threadgroup.org/ThreadSpec
Here it doesn't really make sense to define a parametrised family, as
this really seems to be the only use of PBKDF2 with a CMAC-based PRF (or
with any PRF other than HMAC with SHA1 or SHA2, for that matter).
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Move the key buffer size calculation code under
tests to avoid check-names.sh to complain about
"likely macros with typos".
This removes the calculation of key buffer
sizes for the test driver from the wrapper based on
static size data. But the code is still there in test
code to be used when we go back to work on the
generation of the driver wrapper.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Handling the receipt of a handshake record after the initial handshake
requires non-trivial logic depending on the protocol version and the
endpoint. This logic is currently embedded in mbedtls_ssl_read().
With the introduction of support for [D]TLS 1.3, the logic will become
even more complex, since [D]TLS 1.3 drops support for renegotiation --
which in [D]TLS 1.2 is the main purpose of post-handshake handshake
messages -- but instead introduces numerous other post-handshake
handshake messages.
In order to pave the way for those changes, this commit improves
readability and maintainability of mbedtls_ssl_read() by moving
the TLS <=1.2 logic for handling post-handshake handshake messages
into a separate helper function ssl_handle_hs_message_post_handshake().
The logic of the code is entirely unchanged.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
Might make the implementer's life a bit simpler, and is not a big
constraint on applications.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
No change of behaviour, encoding or naming intended in this commit: just
describe the same behaviour, but in a way that's hopefully clearer and
more complete.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
The server-side `Certificate` handshake message writer checks
whether a certificate is present, and if not fails with:
```
MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED
```
This should never happen, since the library checks the presence
of a suitable certificate before picking a ciphersuite. It is
therefore more suitable to convert this check into an assertion,
and fail with MBEDTLS_ERR_SSL_INTERNAL_ERROR upon failure.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit removes the unused error code
```
MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH
```
from the public API for Mbed TLS 3.0.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
The error code MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH is only
returned from the internal function
```
mbedtls_ssl_set_calc_verify_md()
```
Moreover, at every call-site of this function, it is only
checked whether the return value is 0 or not, while the
exact return value is irrelevant.
The behavior the library is therefore unchanged if we return 1
instead of MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH in
`mbedtls_ssl_set_calc_verify_md()`. This commit makes this change.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This error is used when the output buffer isn't large enough
to hold our own certificate.
In the interest of cleaning up the error space for 3.0, this commit
removes MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE and replaces its single
use by MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
The SSL error code MBEDTLS_ERR_SSL_PEER_VERIFY_FAILED is unused.
Remove it for Mbed TLS 3.0.
The code being unused comes as a surprise, at is seems to be
reasonable to report it to the user upon peer CRT verification
failure. However, this study (can potentially re-introduction
of the code) can be left for 3.x, while the error code removal
can only happen in 3.0.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
The SSL error code MBEDTLS_ERR_SSL_UNKNOWN_CIPHER is unused.
Remove it for Mbed TLS 3.0 and leave a comment indicating the
gap in the error code space it creates.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
