Provide the possibility to clean up internal ENGINE structures. This

takes care of what would otherwise be seen as a memory leak.

crypto/engine/engine.h

@@ -349,6 +349,9 @@ int ENGINE_set_cmd_defns(ENGINE *e, const ENGINE_CMD_DEFN *defns);
 /* Copies across all ENGINE methods and pointers. NB: This does *not* change
  * reference counts however. */
 int ENGINE_cpy(ENGINE *dest, const ENGINE *src);
+/* Cleans the internal engine structure.  This should only be used when the
+ * application is about to exit. */
+void ENGINE_cleanup(void);
 
 /* These return values from within the ENGINE structure. These can be useful
  * with functional references as well as structural references - it depends

crypto/engine/engine_list.c

@@ -376,6 +376,20 @@ int ENGINE_free(ENGINE *e)
 	return 1;
 	}
 
+void ENGINE_cleanup(void)
+        {
+        ENGINE *iterator = engine_list_head;
+
+        while(iterator != NULL)
+                {
+                ENGINE_remove(iterator);
+                ENGINE_free(iterator);
+                iterator = engine_list_head;
+                }
+        engine_list_flag = 0;
+        return;
+        }
+
 int ENGINE_set_id(ENGINE *e, const char *id)
 	{
 	if(id == NULL)