PSA_KEY_USAGE_DERIVE macro

Whether the key may be used to derive other keys or produce a password hash. This flag allows the key to be used for a key derivation operation or for a key agreement operation, if otherwise permitted by the key's type and policy. If this flag is present on all keys used in calls to psa_key_derivation_input_key() for a key derivation operation, then it permits calling psa_key_derivation_output_bytes() or psa_key_derivation_output_key() at the end of the operation.