commit 672279829a891d3a663f71b506d3cf603d51b819
author Ronald Cron <ronald.cron@arm.com> Thu Nov 26 15:16:05 2020 +0100
committer Ronald Cron <ronald.cron@arm.com> Tue Feb 02 11:29:08 2021 +0100
tree 5efa9bd31f9abcac8d3682571bce36f331e0a549
parent 7285cda3873b7cb26385d6a7f4bd9fba72f0df9f

psa: Call export software implementation as a driver

Signed-off-by: Ronald Cron <ronald.cron@arm.com>

library/psa_crypto_driver_wrappers.c

diff --git a/library/psa_crypto_driver_wrappers.c b/library/psa_crypto_driver_wrappers.c
index a58967a..766cf10 100644
--- a/library/psa_crypto_driver_wrappers.c
+++ b/library/psa_crypto_driver_wrappers.c
@@ -444,13 +444,50 @@
 #endif /* PSA_CRYPTO_DRIVER_PRESENT */
 }
 
+psa_status_t psa_driver_wrapper_export_key(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *key_buffer, size_t key_buffer_size,
+    uint8_t *data, size_t data_size, size_t *data_length )
+
+{
+    psa_status_t status = PSA_ERROR_INVALID_ARGUMENT;
+    psa_key_location_t location = PSA_KEY_LIFETIME_GET_LOCATION(
+                                      psa_get_key_lifetime( attributes ) );
+
+    switch( location )
+    {
+        case PSA_KEY_LOCATION_LOCAL_STORAGE:
+            return( psa_export_key_internal( attributes,
+                                             key_buffer,
+                                             key_buffer_size,
+                                             data,
+                                             data_size,
+                                             data_length ) );
+
+        /* Add cases for opaque driver here */
+#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
+#if defined(PSA_CRYPTO_DRIVER_TEST)
+        case PSA_CRYPTO_TEST_DRIVER_LIFETIME:
+            return( test_opaque_export_key( attributes,
+                                            key_buffer,
+                                            key_buffer_size,
+                                            data,
+                                            data_size,
+                                            data_length ) );
+#endif /* PSA_CRYPTO_DRIVER_TEST */
+#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
+        default:
+            /* Key is declared with a lifetime not known to us */
+            return( status );
+    }
+}
+
 psa_status_t psa_driver_wrapper_export_public_key(
     const psa_key_attributes_t *attributes,
     const uint8_t *key_buffer, size_t key_buffer_size,
     uint8_t *data, size_t data_size, size_t *data_length )
 
 {
-#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
     psa_status_t status = PSA_ERROR_INVALID_ARGUMENT;
     psa_key_location_t location = PSA_KEY_LIFETIME_GET_LOCATION(
                                       psa_get_key_lifetime( attributes ) );
@@ -460,6 +497,7 @@
         case PSA_KEY_LOCATION_LOCAL_STORAGE:
             /* Key is stored in the slot in export representation, so
              * cycle through all known transparent accelerators */
+#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
 #if defined(PSA_CRYPTO_DRIVER_TEST)
             status = test_transparent_export_public_key( attributes,
                                                          key_buffer,
@@ -471,9 +509,17 @@
             if( status != PSA_ERROR_NOT_SUPPORTED )
                 return( status );
 #endif /* PSA_CRYPTO_DRIVER_TEST */
+#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
             /* Fell through, meaning no accelerator supports this operation */
-            return( PSA_ERROR_NOT_SUPPORTED );
+            return( psa_export_public_key_internal( attributes,
+                                                    key_buffer,
+                                                    key_buffer_size,
+                                                    data,
+                                                    data_size,
+                                                    data_length ) );
+
         /* Add cases for opaque driver here */
+#if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)
 #if defined(PSA_CRYPTO_DRIVER_TEST)
         case PSA_CRYPTO_TEST_DRIVER_LIFETIME:
             return( test_opaque_export_public_key( attributes,
@@ -483,19 +529,11 @@
                                                    data_size,
                                                    data_length ) );
 #endif /* PSA_CRYPTO_DRIVER_TEST */
+#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
         default:
             /* Key is declared with a lifetime not known to us */
             return( status );
     }
-#else /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
-    (void) attributes;
-    (void) key_buffer;
-    (void) key_buffer_size;
-    (void) data;
-    (void) data_size;
-    (void) data_length;
-    return( PSA_ERROR_NOT_SUPPORTED );
-#endif /* PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT */
 }
 
 /*