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Add a wrapper function for psa_unregister_read

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There are at least 20 occurences in the current code where
we will need this pattern of code, so I thought it best to
put this in a function

Signed-off-by: Ryan Everett <ryan.everett@arm.com>
This commit is contained in:
Ryan Everett 2024-01-31 13:36:39 +00:00
parent 2f1f17201d
commit eb1722a2b9
2 changed files with 36 additions and 0 deletions
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15
library/psa_crypto_slot_management.c
View file

@ -458,6 +458,21 @@ psa_status_t psa_unregister_read(psa_key_slot_t *slot)
return PSA_ERROR_CORRUPTION_DETECTED;
}
psa_status_t psa_unregister_read_under_mutex(psa_key_slot_t *slot)
{
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
#if defined(MBEDTLS_THREADING_C)
PSA_THREADING_CHK_RET(mbedtls_mutex_lock(
&mbedtls_threading_key_slot_mutex));
#endif
status = psa_unregister_read(slot);
#if defined(MBEDTLS_THREADING_C)
PSA_THREADING_CHK_RET(mbedtls_mutex_unlock(
&mbedtls_threading_key_slot_mutex));
#endif
return status;
}
psa_status_t psa_validate_key_location(psa_key_lifetime_t lifetime,
psa_se_drv_table_entry_t **p_drv)
{

21
library/psa_crypto_slot_management.h
View file

@ -200,6 +200,27 @@ static inline psa_status_t psa_register_read(psa_key_slot_t *slot)
*/
psa_status_t psa_unregister_read(psa_key_slot_t *slot);
/** Wrap a call to psa_unregister_read in the global key slot mutex.
*
* If threading is disabled, this simply calls psa_unregister_read.
*
* \note To ease the handling of errors in retrieving a key slot
* a NULL input pointer is valid, and the function returns
* successfully without doing anything in that case.
*
* \param[in] slot The key slot.
* \retval #PSA_SUCCESS
* \p slot is NULL or the key slot reader counter has been
* decremented (and potentially wiped) successfully.
* \retval #PSA_ERROR_CORRUPTION_DETECTED
* The slot's state was neither PSA_SLOT_FULL nor
* PSA_SLOT_PENDING_DELETION.
* Or a wipe was attempted and the slot's state was not
* PSA_SLOT_PENDING_DELETION.
* Or registered_readers was equal to 0.
*/
psa_status_t psa_unregister_read_under_mutex(psa_key_slot_t *slot);
/** Test whether a lifetime designates a key in an external cryptoprocessor.
*
* \param lifetime The lifetime to test.