Implement missing attributes setters and getters

Author: gilles-peskine-arm

include/psa/crypto_struct.h

@@ -276,6 +276,26 @@ static inline struct psa_key_attributes_s psa_key_attributes_init( void )
     return( v );
 }
 
+static inline void psa_make_key_persistent(psa_key_attributes_t *attributes,
+                                           psa_key_id_t id,
+                                           psa_key_lifetime_t lifetime)
+{
+    attributes->id = id;
+    attributes->lifetime = lifetime;
+}
+
+static inline psa_key_id_t psa_get_key_id(
+    const psa_key_attributes_t *attributes)
+{
+    return( attributes->id );
+}
+
+static inline psa_key_lifetime_t psa_get_key_lifetime(
+    const psa_key_attributes_t *attributes)
+{
+    return( attributes->lifetime );
+}
+
 static inline void psa_set_key_usage_flags(psa_key_attributes_t *attributes,
                                            psa_key_usage_t usage_flags)
 {
@@ -312,4 +332,10 @@ static inline psa_key_type_t psa_get_key_type(
     return( attributes->type );
 }
 
+static inline size_t psa_get_key_bits(
+    const psa_key_attributes_t *attributes)
+{
+    return( attributes->bits );
+}
+
 #endif /* PSA_CRYPTO_STRUCT_H */

library/psa_crypto.c

@@ -965,7 +965,7 @@ psa_status_t psa_destroy_key( psa_key_handle_t handle )
 }
 
 /* Return the size of the key in the given slot, in bits. */
-static size_t psa_get_key_bits( const psa_key_slot_t *slot )
+static size_t psa_get_key_slot_bits( const psa_key_slot_t *slot )
 {
     if( key_type_is_raw_bytes( slot->type ) )
         return( slot->data.raw.bytes * 8 );
@@ -1001,7 +1001,7 @@ psa_status_t psa_get_key_information( psa_key_handle_t handle,
     if( type != NULL )
         *type = slot->type;
     if( bits != NULL )
-        *bits = psa_get_key_bits( slot );
+        *bits = psa_get_key_slot_bits( slot );
     return( PSA_SUCCESS );
 }
 
@@ -1050,7 +1050,7 @@ static psa_status_t psa_internal_export_key( const psa_key_slot_t *slot,
     {
         psa_status_t status;
 
-        size_t bytes = PSA_BITS_TO_BYTES( psa_get_key_bits( slot ) );
+        size_t bytes = PSA_BITS_TO_BYTES( psa_get_key_slot_bits( slot ) );
         if( bytes > data_size )
             return( PSA_ERROR_BUFFER_TOO_SMALL );
         status = mbedtls_to_psa_error(
@@ -1285,7 +1285,7 @@ static psa_status_t psa_finish_key_creation( psa_key_slot_t *slot )
         size_t length;
 
         buffer_size = PSA_KEY_EXPORT_MAX_SIZE( slot->type,
-                                               psa_get_key_bits( slot ) );
+                                               psa_get_key_slot_bits( slot ) );
         buffer = mbedtls_calloc( 1, buffer_size );
         if( buffer == NULL && buffer_size != 0 )
             return( PSA_ERROR_INSUFFICIENT_MEMORY );
@@ -1355,7 +1355,7 @@ static psa_status_t psa_copy_key_material( const psa_key_slot_t *source,
     size_t length;
 
     buffer_size = PSA_KEY_EXPORT_MAX_SIZE( source->type,
-                                           psa_get_key_bits( source ) );
+                                           psa_get_key_slot_bits( source ) );
     buffer = mbedtls_calloc( 1, buffer_size );
     if( buffer == NULL && buffer_size != 0 )
         return( PSA_ERROR_INSUFFICIENT_MEMORY );
@@ -2149,7 +2149,7 @@ static psa_status_t psa_mac_setup( psa_mac_operation_t *operation,
     status = psa_get_key_from_slot( handle, &slot, usage, alg );
     if( status != PSA_SUCCESS )
         goto exit;
-    key_bits = psa_get_key_bits( slot );
+    key_bits = psa_get_key_slot_bits( slot );
 
 #if defined(MBEDTLS_CMAC_C)
     if( full_length_alg == PSA_ALG_CMAC )
@@ -3060,7 +3060,7 @@ static psa_status_t psa_cipher_setup( psa_cipher_operation_t *operation,
     status = psa_get_key_from_slot( handle, &slot, usage, alg);
     if( status != PSA_SUCCESS )
         goto exit;
-    key_bits = psa_get_key_bits( slot );
+    key_bits = psa_get_key_slot_bits( slot );
 
     cipher_info = mbedtls_cipher_info_from_psa( alg, slot->type, key_bits, NULL );
     if( cipher_info == NULL )
@@ -3470,7 +3470,7 @@ static psa_status_t psa_aead_setup( aead_operation_t *operation,
     if( status != PSA_SUCCESS )
         return( status );
 
-    key_bits = psa_get_key_bits( operation->slot );
+    key_bits = psa_get_key_slot_bits( operation->slot );
 
     operation->cipher_info =
         mbedtls_cipher_info_from_psa( alg, operation->slot->type, key_bits,