diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 57844c5..bd67887 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -2652,35 +2652,45 @@
 }
 
 psa_status_t psa_mac_update(psa_mac_operation_t *operation,
-                            const uint8_t *input,
+                            const uint8_t *input_external,
                             size_t input_length)
 {
+    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
+    LOCAL_INPUT_DECLARE(input_external, input);
+
     if (operation->id == 0) {
-        return PSA_ERROR_BAD_STATE;
+        status = PSA_ERROR_BAD_STATE;
+        return status;
     }
 
     /* Don't require hash implementations to behave correctly on a
      * zero-length input, which may have an invalid pointer. */
     if (input_length == 0) {
-        return PSA_SUCCESS;
+        status = PSA_SUCCESS;
+        return status;
     }
 
-    psa_status_t status = psa_driver_wrapper_mac_update(operation,
-                                                        input, input_length);
+    LOCAL_INPUT_ALLOC(input_external, input_length, input);
+    status = psa_driver_wrapper_mac_update(operation, input, input_length);
+
     if (status != PSA_SUCCESS) {
         psa_mac_abort(operation);
     }
 
+exit:
+    LOCAL_INPUT_FREE(input_external, input);
+
     return status;
 }
 
 psa_status_t psa_mac_sign_finish(psa_mac_operation_t *operation,
-                                 uint8_t *mac,
+                                 uint8_t *mac_external,
                                  size_t mac_size,
                                  size_t *mac_length)
 {
     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
     psa_status_t abort_status = PSA_ERROR_CORRUPTION_DETECTED;
+    LOCAL_OUTPUT_DECLARE(mac_external, mac);
 
     if (operation->id == 0) {
         status = PSA_ERROR_BAD_STATE;
@@ -2704,6 +2714,7 @@
         goto exit;
     }
 
+    LOCAL_OUTPUT_ALLOC(mac_external, mac_size, mac);
     status = psa_driver_wrapper_mac_sign_finish(operation,
                                                 mac, operation->mac_size,
                                                 mac_length);
@@ -2723,16 +2734,18 @@
     psa_wipe_tag_output_buffer(mac, status, mac_size, *mac_length);
 
     abort_status = psa_mac_abort(operation);
+    LOCAL_OUTPUT_FREE(mac_external, mac);
 
     return status == PSA_SUCCESS ? abort_status : status;
 }
 
 psa_status_t psa_mac_verify_finish(psa_mac_operation_t *operation,
-                                   const uint8_t *mac,
+                                   const uint8_t *mac_external,
                                    size_t mac_length)
 {
     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
     psa_status_t abort_status = PSA_ERROR_CORRUPTION_DETECTED;
+    LOCAL_INPUT_DECLARE(mac_external, mac);
 
     if (operation->id == 0) {
         status = PSA_ERROR_BAD_STATE;
@@ -2749,11 +2762,13 @@
         goto exit;
     }
 
+    LOCAL_INPUT_ALLOC(mac_external, mac_length, mac);
     status = psa_driver_wrapper_mac_verify_finish(operation,
                                                   mac, mac_length);
 
 exit:
     abort_status = psa_mac_abort(operation);
+    LOCAL_INPUT_FREE(mac_external, mac);
 
     return status == PSA_SUCCESS ? abort_status : status;
 }
@@ -2825,28 +2840,42 @@
 
 psa_status_t psa_mac_compute(mbedtls_svc_key_id_t key,
                              psa_algorithm_t alg,
-                             const uint8_t *input,
+                             const uint8_t *input_external,
                              size_t input_length,
-                             uint8_t *mac,
+                             uint8_t *mac_external,
                              size_t mac_size,
                              size_t *mac_length)
 {
-    return psa_mac_compute_internal(key, alg,
+    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
+    LOCAL_INPUT_DECLARE(input_external, input);
+    LOCAL_OUTPUT_DECLARE(mac_external, mac);
+
+    LOCAL_INPUT_ALLOC(input_external, input_length, input);
+    LOCAL_OUTPUT_ALLOC(mac_external, mac_size, mac);
+    status = psa_mac_compute_internal(key, alg,
                                     input, input_length,
                                     mac, mac_size, mac_length, 1);
+exit:
+    LOCAL_INPUT_FREE(input_external, input);
+    LOCAL_OUTPUT_FREE(mac_external, mac);
+
+    return status;
 }
 
 psa_status_t psa_mac_verify(mbedtls_svc_key_id_t key,
                             psa_algorithm_t alg,
-                            const uint8_t *input,
+                            const uint8_t *input_external,
                             size_t input_length,
-                            const uint8_t *mac,
+                            const uint8_t *mac_external,
                             size_t mac_length)
 {
     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
     uint8_t actual_mac[PSA_MAC_MAX_SIZE];
     size_t actual_mac_length;
+    LOCAL_INPUT_DECLARE(input_external, input);
+    LOCAL_INPUT_DECLARE(mac_external, mac);
 
+    LOCAL_INPUT_ALLOC(input_external, input_length, input);
     status = psa_mac_compute_internal(key, alg,
                                       input, input_length,
                                       actual_mac, sizeof(actual_mac),
@@ -2859,6 +2888,8 @@
         status = PSA_ERROR_INVALID_SIGNATURE;
         goto exit;
     }
+
+    LOCAL_INPUT_ALLOC(mac_external, mac_length, mac);
     if (mbedtls_ct_memcmp(mac, actual_mac, actual_mac_length) != 0) {
         status = PSA_ERROR_INVALID_SIGNATURE;
         goto exit;
@@ -2866,6 +2897,8 @@
 
 exit:
     mbedtls_platform_zeroize(actual_mac, sizeof(actual_mac));
+    LOCAL_INPUT_FREE(input_external, input);
+    LOCAL_INPUT_FREE(mac_external, mac);
 
     return status;
 }