Dave Rodgman d69da6c3c3 Improve PSA error return code ...

psa_key_derivation_output_key: prioritize BAD_STATE over NOT_PERMITTED

If psa_key_derivation_output_key() is called on an operation which hasn't been
set up or which has been aborted, return PSA_ERROR_BAD_STATE. Only return
PSA_ERROR_NOT_PERMITTED if the operation state is ok for
psa_key_derivation_input_bytes() or psa_key_derivation_output_bytes() but not
ok to output a key.

Ideally psa_key_derivation_output_key() would return PSA_ERROR_NOT_PERMITTED
only when psa_key_derivation_output_bytes() is possible, but this is clumsier
to implement.

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>

2021-11-16 16:03:31 +00:00

203 KiB

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