psa_cipher_encrypt() and psa_cipher_decrypt() sometimes add a zero offset to
a null pointer when the cipher does not use an IV. This is undefined
behavior, although it works as naively expected on most platforms. This
can cause a crash with modern Clang+ASan (depending on compiler optimizations).
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
In some cases, a cipher operation for an unsupported algorithm could succeed
in psa_cipher_{encrypt,decrypt}_setup() and fail only when input is actually
fed. This is not a major bug, but it has several minor downsides: fail-late
is harder to diagnose for users than fail-early; some code size can be
gained; tests that expect failure for not-supported parameters would have to
be accommodated to also accept success.
This commit at least partially addresses the issue. The only completeness
goal in this commit is to pass our full CI, which discovered that disabling
only PSA_WANT_ALG_STREAM_CIPHER or PSA_WANT_ALG_ECB_NO_PADDING (but keeping
the relevant key type) allowed cipher setup to succeed, which caused
failures in test_suite_psa_crypto_op_fail.generated in
component_test_psa_crypto_config_accel_xxx.
Changes in this commit:
* mbedtls_cipher_info_from_psa() now returns NULL for unsupported cipher
algorithms. (No change related to key types.)
* Some code that is only relevant for ECB is no longer built if
PSA_WANT_ALG_ECB_NO_PADDING is disabled.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The current testing of the PSA configuration is
based on test code located in the library itself.
Remove this code as we are moving to using a
test library instead.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Rename test driver entry points to
libtestdriver1_<name of the Mbed TLS entry point>.
This aligns with the renaming of all Mbed TLS APIs
for the test driver library (that will be put in place
in the following commits) to avoid name conflicts
when linking it with the Mbed TLS library.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Define test driver entry points that provide an alternative
to Mbed TLS driver entry points only when the PSA configuration
is used. Their purpose is only to test the PSA configuration
thus there is no good reason to use them out of this scope.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Use the encoding from an upcoming version of the specification.
Add as much (or as little) testing as is currently present for Camellia.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This parameter was set but not used, which was pointless. Clang 14 detects
this and legitimately complains.
Remove the parameter. This is an internal function, only called once. The
caller already has a sufficient check on the output buffer size which
applies in more cases, so there is no real gain in robustness in adding the
same check inside the internal function.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Fix initialization of mbedtls_psa_cipher_operation_t by not initializing the mbedtls_cipher_context_t typed field completely.
Signed-off-by: gabor-mezei-arm <gabor.mezei@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>
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>
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>
