Nowadays, the timing module just builds on a function that provides a timer
with millisecond resolution. In terms of platform requirements, this is
almost exactly equivalent to `mbedtls_ms_time()`
provides (`mbedtls_ms_time()` is arguably a little stronger because it is
supposed to last longer than a single timer object, but an application could
start a timer when it starts, so there's no real difference.) So it's a bit
silly that `timing.c` essentially reimplements this. Rely on
`mbedtls_ms_time()` instead.
This is an API break because in Mbed TLS 4.0, it was possible to enable
`MBEDTLS_TIMING_C` without `MBEDTLS_HAVE_TIME`. However, `timing.c` only
provided an implementation for Windows and Unix-like platforms, and on those
platforms, it is very likely that the default implementation of
`MBEDTLS_HAVE_TIME` would also work. (The main exception would be a platform
that has the traditional Unix function `gettimeofday()`, but not the 1990s
novelty `clock_gettime()`.) So make this an official requirement, as a
belated change that really should have gone into 4.0 if we'd taken the time
to dig into it.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Even though the TLS RFCs do not mandate libraries to expose *Error
Alerts* (as defined in RFC8446 6.2 for TLS 1.3 and in RFC5246 7.2.2 for
TLS 1.2) to the user, there are use cases when it is handy to get the
actual last received fatal error instead of a generic one. For instance
this enables the user to differ between received fatal errors in case
`mbedtls_ssl_handshake()`, `mbedtls_ssl_handshake_step()` or
`mbedtls_ssl_read()` returned `MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE`.
This changesets stores the last incoming fatal alert in
`mbedtls_ssl_context` and provides `mbedtls_ssl_get_alert()` as a getter
for retrieving it. Another option would be to provide a callback
mechanisms for all kinds of alerts (not only fatals) but for simplicity
I discarded this option.
Signed-off-by: Nico Geyso <ng@gsmk.de>
ripgrep was used to check against the
tf-psa-crypto.v1.0.0-beta Changelog.
rg --multiline -F -f {changelog_to_check}.txt -o ../tf-psa-crypto-ChangeLog
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This commit restores all changelog entries between the
mbedtls-3.6.0 tag and the mbedtls-4.0.0-beta tag.
git diff ce4683e..09dc57d --name-status -- ChangeLog.d
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
The support for TLS ciphersuites without
encryption does not rely anymore on the
MBEDTLS_CIPHER_NULL_CIPHER feature of
the cipher module. Introduce a specific
config option to enable these ciphersuites
and use it instead of MBEDTLS_CIPHER_NULL_CIPHER.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Return a const char* instead of taking a char* as an argument.
This aligns us with the interface used in TF PSA Crypto.
Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
Gilles Peskine