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psa: storage: Use key id macros to compute ITS file identifier

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Use macros instead of accessing directly the key identifier
fields for coding consistency and ease maintenance.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2020-08-25 09:53:53 +02:00
parent f1c9a55947
commit 79ca4274e1
1 changed files with 3 additions and 2 deletions
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5
library/psa_crypto_storage.c
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@ -67,8 +67,9 @@ static psa_storage_uid_t psa_its_identifier_of_slot( mbedtls_svc_key_id_t key )
* owner values are nonzero (as they are on a PSA platform),
* no key file will ever have a value less than 0x100000000, so
* the whole range 0..0xffffffff is available for non-key files. */
uint32_t unsigned_owner = (uint32_t) key.owner;
return( (uint64_t) unsigned_owner << 32 | key.key_id );
uint32_t unsigned_owner_id = MBEDTLS_SVC_KEY_ID_GET_OWNER_ID( key );
return( ( (uint64_t) unsigned_owner_id << 32 ) |
MBEDTLS_SVC_KEY_ID_GET_KEY_ID( key ) );
#else
/* Use the key id directly as a file name.
* psa_is_key_id_valid() in psa_crypto_slot_management.c