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Make psa_close_key thread safe

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There are two mutex locks here, the one performed in get_and_lock.. and the one performed outside.
Linearizes at the final unlock.
(This function is deprecated)
Signed-off-by: Ryan Everett <ryan.everett@arm.com>
This commit is contained in:
Ryan Everett 2024-01-24 11:39:21 +00:00
parent 47c74a4773
commit f23336e040
1 changed files with 13 additions and 2 deletions
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15
library/psa_crypto_slot_management.c
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@ -536,11 +536,22 @@ psa_status_t psa_close_key(psa_key_handle_t handle)
return status;
}
#if defined(MBEDTLS_THREADING_C)
PSA_THREADING_CHK_RET(mbedtls_mutex_lock(
&mbedtls_threading_key_slot_mutex));
#endif
if (slot->registered_readers == 1) {
return psa_wipe_key_slot(slot);
status = psa_wipe_key_slot(slot);
} else {
return psa_unregister_read(slot);
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_purge_key(mbedtls_svc_key_id_t key)