Move the global variable to the PSA layer, and just set that when calling PSA
level functions.
Move the internal ecp set to before each ecp call.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Change name and document to ensure suitability only for "tags" is explicit. Add
support for output size of zero in PSA_SUCCESS case.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Also in the core part change stage to computation after return from psa_driver_wrapper_pake_setup() regardless of the result. At this point driver context is active even if init has failed.
Additionally handle deallocation of password on failure in mbedtls_psa_pake_setup(). The plan was to handle deallocation on core level by calling abort on failure.
Unfortunately in this case when mbedtls_psa_pake_setup() fails with an unsupported result the built-in implementation is executed (if available) and it will reallocate the password leading to the memory leak.
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
Adapt pake test (passing NULL buffers is not allowed).
Passing the null buffer to psa_pake_output results in a hard fault.
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
In the future key attributes will be available for opaque driver via psa_crypto_driver_pake_get_password_key().
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
Driver is now responsible for creating its own copy of the password in the setup function.
After calling pake setup driver entry point core frees memory for password.
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
- Add `alg` and `computation_stage` to `psa_pake_operation_s`.
Now when logic is moved to core information about `alg` is required.
`computation_stage` is a structure that provides a union of computation stages for pake algorithms.
- Move the jpake operation logic from driver to core. This requires changing driver entry points for `psa_pake_output`/`psa_pake_input` functions and adding a `computation_stage` parameter. I'm not sure if this solution is correct. Now the driver can check the current computation stage and perform some action. For jpake drivers `step` parameter is now not used, but I think it needs to stay as it might be needed for other pake algorithms.
- Removed test that seems to be redundant as we can't be sure that operation is aborted after failure.
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
psa_get_and_lock_key_slot_with_policy() becomes public temporarily as part of:
https://github.com/Mbed-TLS/mbedtls/pull/6608
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
Previously calling get_num_ops more than once would have ended up with ops
getting double counted, and not calling inbetween completes would have ended up
with ops getting missed. Fix this by moving this to where the work is actually
done, and add tests for double calls to get_num_ops().
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Truncate input hashes to curve private key size as that is all that is required
for the internal implementation.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
After moving the MPIs used to output from the operation into the complete
function, I failed to move the accompanying free as well.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Move the obfuscation of the internal library only returning a delta of ops done
into the driver wrapper, thus meaning driver wrapper and API call both return
absolute values of work done. Document the differences at the internal
implementation level.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
If an error occurs, calling any function on the same operation should return
PSA_ERROR_BAD_STATE, and we were not honouring that for all errors. Add extra
failure tests to try and ratify this.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
For sign and verify, the pointer passed in to the hash is not guaranteed to
remain valid inbetween calls, thus we need to store the hash in the
operation. Added a test to ensure this is the case.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Set the psa level global anyway, regardless of having a built in
implementation, to match the set function. Also, ensure that value returned
is the same as value passed in, irregardless of internal implementation
requirements.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Ensure that num_ops is cleared when manual abort is called, but obviously not
when an operation just completes, and test this.
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Move to accumulate ops in context rather than attempting to read straight out
of structures due to structure ops getting reset per operation, and also
issues with _abort clearing internal data. Fix usage of size_t in structures
Signed-off-by: Paul Elliott <paul.elliott@arm.com>
Pacify Clang >=15 which complained:
```
include/psa/crypto.h:91:23: error: empty paragraph passed to '\retval' command [-Werror,-Wdocumentation]
* \retval #PSA_SUCCESS
~~~~~~~~~~~~~~~~~~~^
```
This commit performs the following systematic replacement:
```
perl -i -0777 -p -e 's/([\\@])(retval +\S+)\n(?! *\*? *([^\n \\*\/]|\\[cp]\b))/$1$2 ${1}emptydescription\n/g' $(git ls-files '*.[hc]' '*.function' '*.jinja')
```
i.e. add an `\emptydescription` argument to `\retval` commands (or
`@retval`, which we don't normally used) that are followed by a single word,
unless the next line looks like it contains text which would be the
description.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The key derivation algorithm PSA_ALG_TLS12_ECJPAKE_TO_PMS cannot be
used on a shared secret from a key agreement since its input must be
an ECC public key. Reject this properly.
This is tested by test_suite_psa_crypto_op_fail.generated.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
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>
Additionally use psa_get_and_lock_key_slot_with_policy() to obtain key.
This requires making this function public. This will have to be solved while adding driver dipatch for EC-JPAKE.
Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
Add component_test_psa_config_accel_ecdh to all.sh to test key agreement driver wrapper with libtestdriver1.
Signed-off-by: Aditya Deshpande <aditya.deshpande@arm.com>
