Most buffers that MPS deals with are small and representable
with integer types of width 16-bit or more.
For highly memory constrained systems, it is therefore a potential
for significant memory savings to use 16-bit types for buffer sizes
throughout MPS.
In prepraration for this, this commit introduces typdefs
```
mbedtls_mps_size_t
mbedtls_mps_stored_size_t
```
for buffer sizes in the MPS implementation and the MPS structures,
respectively.
So far, those MUST be defined as `size_t`: While an effort has been made
to write most of MPS code in terms of `mbedtls_mps_[stored_]size_t` in a
way that would allow narrower types, those aren't yet supported. Still,
we retain the typedefs in order to avoid unnecessary rewriting of a large
body of the MPS codebase.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit adds the interface fo the MPS reader component as
`library/mps/reader.h`.
Please see the file itself for extensive documentation.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
MPS' tracing module uses four macros:
1) TRACE( type, fmt, ... )
This acts like `printf( fmt, ... )` but also allows
the specification of a type of trace output (comment,
warning, error, ...)
2) TRACE_INIT
This acts like TRACE() but increases the level of
indentation. It will be used at the beginning of
function calls.
3) RETURN( val )
Equivalent to `return( val )` plus a decrement in the
level of indentation. This should be used at the end of
functions that have been started with TRACE_INIT.
4) TRACE_END
This combines a trace output with a decrement of the
level of indentation. It's necessary prior to leaving
functions which have been started with TRACE_INIT
but which don't have a return value.
This commit defines those macros as no-op dummies in
`library/mps/trace.h` for now.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit adds an MPS-specific compile-time option
`MBEDTLS_MPS_TRACE` to the internal MPS header `mps/common.h`.
So far -- this may need revisiting -- MPS comes with its own
internal tracing module which allows to track the operation of
MPS' various layers for the purpose of understanding of it workings
as well as for debugging.
The reasons for the introduction of a module separate from SSL debug
are the following:
1) The SSL debug module requires an SSL context to function because
debug callbacks are part of the runtime configuration of the SSL
module.
The MPS tracing module, in contrast, is not supposed to be used
in production environments, and there is no need for a runtime
configuration. Instead, a compile-time defined tracing callback
is used.
2) In the interest of modularity, MPS' tracing module shouldn't
require having an SSL context around.
3) Purely visually, MPS' tracing module adds support for indentation
according to call-depth and coloring according to which module is
being used, which makes it very useful for what's going on; however,
those features aren't available in the SSL debug module (and they
shouldn't be).
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit adds the compile-time option MBEDTLS_MPS_ENABLE_ASSERTIONS
which controls the presence of runtime assertions in MPS code.
See the documentation in the header for more information.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit introduces the internal MPS header `mps/common.h`
which will subsequently be populated with MPS-specific compile-time
options and helper macros. For now, it's a stub.
Signed-off-by: Hanno Becker <hanno.becker@arm.com>
Remove cipher_generate_iv driver entry point as there
is no known use case to delegate this to a driver.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
The IV length computed in the cipher PSA implementation is
the default IV length thus use the PSA macro PSA_CIPHER_IV_LENGTH
defined to do that.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Use psa_generate_random() to generate IVs instead of
mbedtls_psa_get_random(). mbedtls_psa_get_random() is
meant to be used as the f_rng argument of Mbed TLS
library functions.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Symmetric key management is not intended to be
delegated to drivers. Thus, key management code
for a given symmetric key type should be included
in the library whether or not the support for
cryptographic operations based on that type of
symmetric key may be delegated to drivers.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Isolate the Mbed TLS cipher driver interfaces.
Do the actual cipher operations in utility
functions that are just called by the interface
functions.
The utility functions are intended to be also called
by the cipher test driver interface functions (to be
introduced subsequently) and allow to test the case
where cipher operations are fully accelerated with no
fallback (component test_psa_crypto_config_basic of
all.sh).
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
As per drivers, pass to the Mbed TLS implementation of
the cipher multi-part operation its operation context
and not the PSA operation context.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Move members that are of no use to the PSA crypto core
to the Mbed TLS implementation specific operation context.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
For cipher multi-part operations, dispatch based on
the driver identifier even in the case of the
Mbed TLS software implementation (viewed as a driver).
Also use the driver identifier to check that an
cipher operation context is active or not.
This aligns the way hash and cipher multi-part
operations are dispatched.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Change the operation context to the PSA one to be
able to call the software implementation from
the driver wrapper later on.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Change the signature of
psa_driver_wrapper_cipher_encrypt/decrypt_setup to
that of a PSA driver cipher_encrypt/decrypt_setup
entry point.
Change the operation context to the PSA one to be
able to call the software implementation from
the driver wrapper later on.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Split out the cipher setup based on cipher.c
in psa_cipher_setup_internal() whose signature
is that of a PSA driver cipher_setup entry
point.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Rework psa_cipher_setup in preparation of
calling the cipher setup based on cipher.c
through the interface of a PSA driver
cipher_setup entry point.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Add psa_crypto_cipher.[ch] files to contain the
Mbed TLS implementation of PSA driver cipher driver
entry points.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
To run succesfully the test
"PSA sign: invalid algorithm for ECC key" of
test_suite_psa_crypto when ECDSA support is not included
in the library, always return INVALID_ARGUMENT
in case of an ECC key not used for ECDSA, whether
ECDSA support is present or not.
Then apply the same logic to RSA sign RSA and RSA/ECC
verify for the sake of consistency.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Add missing PSA_WANT_CCM/GCM/CMAC. This completes
the set of PSA_WANT config options given the
current support of PSA crypto in Mbed TLS.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
If an elliptic curve was enabled in the Mbed TLS classic API (#define
MBEDTLS_ECP_DP_xxx), but not enabled in the PSA configuration (#define
PSA_WANT_ECC_xxx), it would still work if you tried to use it through
PSA.
This is generally benign, but could be a security issue if you want to
disable a curve in PSA for some security reason (such as a known bug
in its implementation, which may not matter in the classic API if Mbed
TLS is running in a secure enclave and is only reachable from
untrusted callers through the PSA API). More urgently, this broke
test_suite_psa_crypto_not_supported.generated.
So if a curve is not enabled in the PSA configuration, ensure that
it's treated as unsupported through the PSA software implementation.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Return PSA_ERROR_INVALID_HANDLE instead of
PSA_ERROR_DOES_NOT_EXIST if invalid key is passed for some key
operations.
Signed-off-by: Maulik Patel <Maulik.Patel@arm.com>
The hash driver entry points (and consequentially the hash driver core)
are now always compiled on when PSA_CRYPTO_DRIVER_TEST is turned on.
Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
The PSA Core is already calling psa_hash_abort, so the driver doesn't
have to do that explicitly.
Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
Drivers (both built-in and external) need to declare their context
structures in a way such that they are accessible by the
to-be-autogenerated crypto_driver_contexts.h file. That file lives in
include/psa, which means all builtin driver context structure
declarations also need to live in include/psa.
Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
MinGW and older windows compilers cannot cope with %zu or %lld (there is
a workaround for MinGW, but it involves linking more code, there is no
workaround for Windows compilers prior to 2013). Attempt to work around
this by defining printf specifiers for size_t per platform for the
compilers that cannot use the C99 specifiers.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This was a false positive caused by the compiler seeing the %08lx
specifiers and judging the output on that, rather than the numbers being
fed in. Given these are going to be maximum 32 bit numbers, then better
to use %08x, which keeps -Wformat-truncation=2 happy as well.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Fixes for printf format specifiers, where they have been flagged as
invalid sizes by coverity, and new build flags to enable catching these
errors when building using CMake. Note that this patch uses %zu, which
requires C99 or later.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Printf could potentially produce 2 64 bit numbers here when there is
only space for one, thus causing a buffer overflow. This was caught by
the new warning flags.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
We were not getting any warnings on printf format errors, as we do not
explicitly use printf anywhere in the code. Thankfully there is a way
to mark a function as having printf behaviour so that its inputs can be
checked in the same way as printf would be.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Apply the right define guards for the right purpose. The 'core' hash
driver is included if any hash algorithm is either to be tested through
the test driver, or if it is requested by a user and not accelerated
(i.e. 'fallback'/'software' driver requested for the algorithm).
Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
Apparently there's a goal to make the PSA Crypto core free from
dynamic memory allocations. Therefore, all driver context structures
need to be known at compile time in order for the core to know their
final size.
This change defines & implements for hashing operations how the context
structures get defined.
Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
mac size is previously checked to not be less than 4, so it can't be zero
anymore at this point.
Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
Memsan build was reporting a false positive use of uninitialised memory
in x509_crt.c on a struct filled by an _stat function call. According to
the man pages, the element reported has to be filled in by the call, so
to be safe, and keep memsan happy, zero the struct first.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
When ECDSA is not supported by the library, prefer
to return NOT_SUPPORTED than INVALID_ARGUMENT when
asked for an ECDSA signature.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Move the check that ECDSA is supported from the
caller of the function responsible for Mbed TLS
ECDSA signatures to this function, namely
mbedtls_psa_ecdsa_sign_hash().
This makes the caller code more readable and is
more aligned with what is expected from a
sign_hash() PSA driver entry point.
Add a negative test case where a deterministic
ECDSA signature is requested while the library
does not support deterministic ECDSA.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
