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New macro PSA_KEY_LIFETIME_IS_READ_ONLY

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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
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Gilles Peskine
2021-04-21 20:05:59 +02:00
parent 90dfc35643
commit d133bb2909
3 changed files with 28 additions and 0 deletions
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20
include/psa/crypto_values.h
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@ -2020,6 +2020,26 @@
(PSA_KEY_LIFETIME_GET_PERSISTENCE(lifetime) == \
PSA_KEY_PERSISTENCE_VOLATILE)
/** Whether a key lifetime indicates that the key is read-only.
*
* Read-only keys cannot be created or destroyed through the PSA Crypto API.
* They must be created through platform-specific means that bypass the API.
*
* Some platforms may offer ways to destroy read-only keys. For example,
* a platform with multiple levels of privilege may expose a key to an
* application without allowing that application to destroy the key, in
* which case it may show the key a view of the key metadata where the
* lifetime is read-only.
*
* \param lifetime The lifetime value to query (value of type
* ::psa_key_lifetime_t).
*
* \return \c 1 if the key is read-only, otherwise \c 0.
*/
#define PSA_KEY_LIFETIME_IS_READ_ONLY(lifetime) \
(PSA_KEY_LIFETIME_GET_PERSISTENCE(lifetime) == \
PSA_KEY_PERSISTENCE_READ_ONLY)
/** Construct a lifetime from a persistence level and a location.
*
* \param persistence The persistence level