new API call to change db at runtime

Author: paul-szczepanek-arm

features/FEATURE_BLE/ble/SecurityManager.h

@@ -441,7 +441,7 @@ class SecurityManager {
      *                           support out-of-band exchanges of security data.
      * @param[in]  passkey       To specify a static passkey.
      * @param[in]  signing       Generate and distribute signing key during pairing
-     * @param[in]  dbPath        Path to the folder used to store keys in the filesystem,
+     * @param[in]  dbPath        Path to the file used to store keys in the filesystem,
      *                           if NULL keys will be only stored in memory
      *
      *
@@ -452,17 +452,31 @@ class SecurityManager {
                              SecurityIOCapabilities_t iocaps        = IO_CAPS_NONE,
                              const Passkey_t          passkey       = NULL,
                              bool                     signing       = true,
-                             const char              *dbPath        = NULL) {
+                             const char              *dbFilepath    = NULL) {
         /* Avoid compiler warnings about unused variables. */
         (void)enableBonding;
         (void)requireMITM;
         (void)iocaps;
         (void)passkey;
-        (void)dbPath;
+        (void)dbFilepath;
 
         return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if security is supported. */
     }
 
+    /**
+     * Change the file used for the security datagse. If path is invalid or a NULL is passed
+     * keys will only be stored in memory.
+     *
+     * @param[in]  dbPath        Path to the file used to store keys in the filesystem,
+     *                           if NULL keys will be only stored in memory
+     *
+     * @return BLE_ERROR_NONE on success.
+     */
+    virtual ble_error_t setDatabaseFile(const char *dbFilepath = NULL) {
+        (void)dbFilepath;
+        return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if security is supported. */
+    }
+
     /**
      * Notify all registered onShutdown callbacks that the SecurityManager is
      * about to be shutdown and clear all SecurityManager state of the

features/FEATURE_BLE/ble/generic/GenericSecurityManager.h

@@ -53,6 +53,8 @@ class GenericSecurityManager : public SecurityManager,
         const char* db_path = NULL
     );
 
+    virtual ble_error_t setDatabaseFile(const char *db_path = NULL);
+
     virtual ble_error_t reset();
 
     virtual ble_error_t preserveBondingStateOnReset(

features/FEATURE_BLE/source/generic/GenericSecurityManager.cpp

@@ -43,29 +43,16 @@ ble_error_t GenericSecurityManager::init(
     const char* db_path
 ) {
 
-    ble_error_t err = _pal.initialize();
-    if (err) {
-    	return err;
+    ble_error_t result = _pal.initialize();
+    if (result != BLE_ERROR_NONE) {
+    	return result;
     }
 
-    if (_db) {
-        delete _db;
-    }
-
-    FILE* db_file = FileSecurityDb::open_db_file(db_path);
-
-    if (db_file) {
-        _db = new (std::nothrow) FileSecurityDb(db_file);
-    } else {
-        _db = new (std::nothrow) MemorySecurityDb();
+    result = setDatabaseFile(db_path);
+    if (result != BLE_ERROR_NONE) {
+        return result;
     }
 
-    if (!_db) {
-        return BLE_ERROR_NO_MEM;
-    }
-
-    _db->restore();
-
     _pal.set_io_capability((io_capability_t::type) iocaps);
 
     if (passkey) {
@@ -115,6 +102,30 @@ ble_error_t GenericSecurityManager::init(
     return BLE_ERROR_NONE;
 }
 
+ble_error_t GenericSecurityManager::setDatabaseFile(
+    const char *db_path
+) {
+    if (_db) {
+        delete _db;
+    }
+
+    FILE* db_file = FileSecurityDb::open_db_file(db_path);
+
+    if (db_file) {
+        _db = new (std::nothrow) FileSecurityDb(db_file);
+    } else {
+        _db = new (std::nothrow) MemorySecurityDb();
+    }
+
+    if (!_db) {
+        return BLE_ERROR_NO_MEM;
+    }
+
+    _db->restore();
+
+    return BLE_ERROR_NONE;
+}
+
 ble_error_t GenericSecurityManager::reset(void) {
     _pal.reset();
     SecurityManager::reset();