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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>
This commit is contained in:
Gilles Peskine 2021-04-21 20:05:59 +02:00
parent a5a800dce0
commit 7aa260d481
3 changed files with 28 additions and 0 deletions
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20
include/psa/crypto_values.h
View File

@ -1895,6 +1895,26 @@
(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

6
tests/suites/test_suite_psa_crypto_metadata.data
View File

@ -380,6 +380,9 @@ lifetime:PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(2, PSA_KEY_LOCATION_LOCA
Lifetime: 254, local storage
lifetime:PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(254, PSA_KEY_LOCATION_LOCAL_STORAGE):0:254:PSA_KEY_LOCATION_LOCAL_STORAGE
Lifetime: read-only, local storage
lifetime:PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(PSA_KEY_PERSISTENCE_READ_ONLY, PSA_KEY_LOCATION_LOCAL_STORAGE):KEY_LIFETIME_IS_READ_ONLY:PSA_KEY_PERSISTENCE_READ_ONLY:PSA_KEY_LOCATION_LOCAL_STORAGE
Lifetime: volatile, 0x123456
lifetime:PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(PSA_KEY_PERSISTENCE_VOLATILE, 0x123456):KEY_LIFETIME_IS_VOLATILE:PSA_KEY_PERSISTENCE_VOLATILE:0x123456
@ -391,3 +394,6 @@ lifetime:PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(2, 0x123456):0:2:0x12345
Lifetime: 254, 0x123456
lifetime:PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(254, 0x123456):0:254:0x123456
Lifetime: read-only, 0x123456
lifetime:PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION(PSA_KEY_PERSISTENCE_READ_ONLY, 0x123456):KEY_LIFETIME_IS_READ_ONLY:PSA_KEY_PERSISTENCE_READ_ONLY:0x123456

2
tests/suites/test_suite_psa_crypto_metadata.function
View File

@ -59,6 +59,7 @@
* lifetime classification macro PSA_KEY_LIFETIME_IS_xxx. The name of the
* flag is the name of the classification macro without the PSA_ prefix. */
#define KEY_LIFETIME_IS_VOLATILE ( 1u << 0 )
#define KEY_LIFETIME_IS_READ_ONLY ( 1u << 1 )
#define TEST_CLASSIFICATION_MACRO( flag, alg, flags ) \
do \
@ -662,6 +663,7 @@ void lifetime( int lifetime_arg, int classification_flags,
unsigned flags = classification_flags;
TEST_CLASSIFICATION_MACRO( KEY_LIFETIME_IS_VOLATILE, lifetime, flags );
TEST_CLASSIFICATION_MACRO( KEY_LIFETIME_IS_READ_ONLY, lifetime, flags );
TEST_EQUAL( PSA_KEY_LIFETIME_GET_PERSISTENCE( lifetime ), persistence );
TEST_EQUAL( PSA_KEY_LIFETIME_GET_LOCATION( lifetime ), location );