Ronald Cron 9103d490e8 psa: ecdsa: Rework deterministic support check
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>
2021-03-04 13:32:27 +01:00
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