allow to fix local csrk for testing

ble/sm.c

@@ -117,6 +117,8 @@ typedef enum {
 // GLOBAL DATA
 //
 
+static uint8_t test_use_fixed_local_csrk;
+
 // configuration
 static uint8_t sm_accepted_stk_generation_methods;
 static uint8_t sm_max_encryption_key_size;
@@ -1505,6 +1507,11 @@ static void sm_run(void){
                 if (setup->sm_key_distribution_send_set &   SM_KEYDIST_FLAG_SIGNING_IDENTIFICATION){
                     setup->sm_key_distribution_send_set &= ~SM_KEYDIST_FLAG_SIGNING_IDENTIFICATION;
 
+                    // hack to reproduce test runs
+                    if (test_use_fixed_local_csrk){
+                        memset(setup->sm_local_csrk, 0xcc, 16);
+                    }
+
                     uint8_t buffer[17];
                     buffer[0] = SM_CODE_SIGNING_INFORMATION;
                     log_info("sm: store local CSRK");
@@ -2280,6 +2287,10 @@ void sm_test_set_irk(sm_key_t irk){
     sm_persistent_irk_ready = 1;
 }
 
+void sm_test_use_fixed_local_csrk(void){
+    test_use_fixed_local_csrk = 1;
+}
+
 void sm_init(void){
     // set some (BTstack default) ER and IR
     int i;
@@ -2311,6 +2322,8 @@ void sm_init(void){
 
     sm_active_connection = 0;
 
+    test_use_fixed_local_csrk = 0;
+
     // attach to lower layers
     l2cap_register_fixed_channel(sm_packet_handler, L2CAP_CID_SECURITY_MANAGER_PROTOCOL);
 }

ble/sm.h

@@ -279,6 +279,9 @@ int sm_address_resolution_lookup(uint8_t addr_type, bd_addr_t addr);
 int sm_le_device_index(uint16_t handle );
 /* API_END */
 
+// testing only
+void sm_test_use_fixed_local_csrk(void);
+
 #if defined __cplusplus
 }
 #endif

test/pts/ble_central_test.c

@@ -1494,6 +1494,7 @@ int btstack_main(int argc, const char * argv[]){
 
     sm_set_encryption_key_size_range(sm_min_key_size, 16);
     sm_test_set_irk(test_irk);
+    sm_test_use_fixed_local_csrk();
 
     // setup GATT Client
     gatt_client_init();