sys/psa_crypto: Adding ecc p256r1 pub key derivation

[Lukas-Luger]

Contribution description

This PR adds public key derivation for P256R1 curves using the micro-ecc backend. Unfortunately the Cryptocell 310 does not support this operation.

Testing procedure

The existing test at tests/sys/psa_crypto_ecdsa has been extended to verify the key derivation.

Issues/PRs references

None

[riot-ci]

Murdock results

✔️ PASSED

a932a4e tests/sys/psa_crypto_ecdsa: add pub key derivation

Success	Failures	Total	Runtime
10362	0	10363	14m:55s

Artifacts

• Documentation preview

[mguetschow]

Quoting Murdock

In file included from psa_crypto_algorithm_dispatch.c:34:
include/psa_ecc.h:99:35: error: empty paragraph passed to '@param' command [-Werror,-Wdocumentation]
 * @param[in]       priv_key_buffer
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
include/psa_ecc.h:100:34: error: empty paragraph passed to '@param' command [-Werror,-Wdocumentation]
 * @param[out]      pub_key_buffer
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
include/psa_ecc.h:101:42: error: empty paragraph passed to '@param' command [-Werror,-Wdocumentation]
 * @param[in]       priv_key_buffer_length
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
include/psa_ecc.h:102:10: error: unrecognized parameter passing direction, valid directions are '[in]', '[out]' and '[in,out]' [-Werror,-Wdocumentation]
 * @param[inout]    pub_key_buffer_length
         ^~~~~~~
include/psa_ecc.h:102:41: error: empty paragraph passed to '@param' command [-Werror,-Wdocumentation]
 * @param[inout]    pub_key_buffer_length
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
5 errors generated.

[mguetschow]

Thanks, please squash :)