For each received ClientHello fragment, check
that its epoch is zero and update the
record-level sequence number.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Simplify and improve error reporting and remove unnecessary
initialisation (the caller is responsible for initialising those
values).
Signed-off-by: Janos Follath <janos.follath@arm.com>
The caller is returning MBEDTLS_ERR_SSL_ILLEGAL_PARAMETER if
ssl_parse_signature_algorithm() fails, but
ssl_parse_signature_algorithm() returns
MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE upon failure. There is no good reason
for this mismatch and better to be aligned.
Signed-off-by: Janos Follath <janos.follath@arm.com>
After the recent refactoring ssl_parse_signature_algorithm() sends an
alert on failure, but the caller also sends an alert on failure. Sending
two alerts is at least a protocol violation, and might not leave the SSL
context in a good state.
It is simpler to have the caller read the two bytes, and pass them to
this function.
Signed-off-by: Janos Follath <janos.follath@arm.com>
The logic was easier to follow before 693a47a, which removed the
ssl_parse_signature_algorithm function and introduced the bug being
fixed in this PR.
When validating multiple conditions, it's easier to read, easier to
debug and, as we can see, easier to get right if you validate them
separately.
Signed-off-by: Janos Follath <janos.follath@arm.com>
This bug caused the client accepting sig_algs used by the server that
it explicitly wanted to disallow.
Signed-off-by: Janos Follath <janos.follath@arm.com>
The check was wrongly removed by the commit
"ssl_tls12_server.c: Move ClientHello message_seq adjustment".
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Move back the digest update just after
the call to mbedtls_ssl_read_record().
It fits well here as we explain in the
comment associated to the call to
mbedtls_ssl_read_record() that we
update it manually.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Define `_POSIX_C_SOURCE` and `_XOPEN_SOURCE` in a single place that
applies everywhere, to make things simple.
This may break some platforms that require special handling for POSIX
functions and types. Subsequent commits will add platform-specific hacks
as needed.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
We were using slightly different guards to decide whether to include
`<unistd.h>` in different places. Unify those.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
On MingW, temporarily force the use of the standard versions of `snprintf()`
and `vsnprintf()` (since we set `__USE_MINGW_ANSI_STDIO` in
`mbedtls_platform_requirements.h`). Do not honor `platform.h` configuration,
because with the current TF-PSA-Crypto, `MBEDTLS_PLATFORM_VSNPRINTF_ALT and
`MBEDTLS_PLATFORM_SNPRINTF_ALT` are always enabled on MinGW, so what matters
is the setting of `__USE_MINGW_ANSI_STDIO` when `platform.c` is built, and
until https://github.com/Mbed-TLS/TF-PSA-Crypto/pull/694, the legacy printf
functions are used there.
Revert this commit once the `tf-psa-crypto` module is updated with the merge
of https://github.com/Mbed-TLS/TF-PSA-Crypto/pull/694.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Always activate `__USE_MINGW_ANSI_STDIO` unless overridden on the command
line. This is necessary with older versions of MingW and/or Windows,
where snprintf does not always zero-terminate the buffer, and does
not support formats such as `"%zu"` for size_t and `"%lld"` for long long.
Simplify debug.h accordingly. The macros `MBEDTLS_PRINTF_SIZET`,
`MBEDTLS_PRINTF_SIZET_HAX` and `MBEDTLS_PRINTF_LONGLONG` are no longer
needed, but they are still used in our code base and must stay in debug.h
for backward compatibility.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
In `test_suite_debug`, test `mbedtls_debug_snprintf()`, which uses
`mbedtls_vsnprintf()` like `mbedtls_debug_print_msg()`. Do this instead of
testing `mbedtls_snprintf()`, which might be subtly different (older
Windows runtimes had slightly different behavior for vsnprintf() vs
snprintf(); TF-PSA-Crypto might pick up a different function if the
platform configuration is different in TF-PSA-Crypto and Mbed TLS).
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
On some platforms, the system headers expose different interfaces depending
on what macros are defined, for example to provide different standards
compliance level. Create a common place where we can declare such macros,
so that our code can behave in the same way when it's in different files.
Individual .c files can still override these requirements by defining
macros before including the common header, if it's really necessary.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
We already have `x509_internal.h` which is common to all parts of the X.509
library, and `ssl_misc.h` which is common to all parts of the TLS library.
Also create `mbedtls_common.h` which is for the Mbed TLS project as a whole.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
In mbedtls_x509_string_to_names() we were not checking for allocation
failures. An allocation failure would lead to a memcpy() to a null
pointer address.
Fix this by checking the result of the call to mbedtls_calloc() and
returning MBEDTLS_ERR_X509_ALLOC_FAILED in the error case.
Signed-off-by: David Horstmann <david.horstmann@arm.com>
In ssl_tls12_server.c:ssl_parse_client_hello(), remove
the code that directly reads the received data to read
the record expected to contain the ClientHello message.
The function already supported handling a ClientHello
read via mbedtls_ssl_read_record() in the following
cases:
- when the ClientHello was read as a post-handshake
message (renegotiation).
- when the ClientHello was read by
ssl_tls13_process_client_hello() during TLS 1.3 or
TLS 1.2 version negotiation.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
