Initialize key bits to max size + 1 in psa_import_key
In psa_import_key, the key bits value was uninitialized before
calling the secure element driver import function. There is a
potential issue if the driver returns PSA_SUCCESS without setting
the key bits. This shouldn't happen, but shouldn't be discounted
either, so we initialize the key bits to an invalid issue.
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 6ec2a1c..93af0d3 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -1835,7 +1835,9 @@
if( driver != NULL )
{
const psa_drv_se_t *drv = psa_get_se_driver_methods( driver );
- size_t bits;
+ /* The driver should set the number of key bits, however in
+ * case it doesn't, we initialize bits to an invalid value. */
+ size_t bits = PSA_MAX_KEY_BITS + 1;
if( drv->key_management == NULL ||
drv->key_management->p_import == NULL )
{