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Add a note about why key_type is required

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Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
This commit is contained in:
Steven Cooreman 2021-03-02 21:27:42 +01:00
parent 1ac5ce3b91
commit 5a17267442
1 changed files with 10 additions and 0 deletions
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10
library/psa_crypto.c
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@ -917,6 +917,11 @@ static int psa_key_algorithm_permits( psa_key_type_t key_type,
*
* The caller must test usage flags separately.
*
* \note This function requires providing the key type for which the policy is
* being validated, since some algorithm policy definitions (e.g. MAC)
* have different properties depending on what kind of cipher it is
* combined with.
*
* \retval PSA_SUCCESS When \p alg is a specific algorithm
* allowed by the \p policy.
* \retval PSA_ERROR_INVALID_ARGUMENT When \p alg is not a specific algorithm
@ -943,6 +948,11 @@ static psa_status_t psa_key_policy_permits( const psa_key_policy_t *policy,
}
/** Restrict a key policy based on a constraint.
*
* \note This function requires providing the key type for which the policy is
* being restricted, since some algorithm policy definitions (e.g. MAC)
* have different properties depending on what kind of cipher it is
* combined with.
*
* \param[in] key_type The key type for which to restrict the policy
* \param[in,out] policy The policy to restrict.