Strict control of streaming API keys and MACHINE GUIDs in stream.conf (#14063)

do not allow machine guids to be used as API keys

streaming/rrdpush.c

@@ -766,21 +766,30 @@ int rrdpush_receiver_thread_spawn(struct web_client *w, char *url) {
 
     if(regenerate_guid(key, buf) == -1) {
         rrdhost_system_info_free(system_info);
-        log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - INVALID KEY");
+        log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - INVALID KEY");
         error("STREAM [receive from [%s]:%s]: API key '%s' is not valid GUID (use the command uuidgen to generate one). Forbidding access.", w->client_ip, w->client_port, key);
         return rrdpush_receiver_permission_denied(w);
     }
 
     if(regenerate_guid(machine_guid, buf) == -1) {
         rrdhost_system_info_free(system_info);
-        log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - INVALID MACHINE GUID");
+        log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - INVALID MACHINE GUID");
         error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not GUID. Forbidding access.", w->client_ip, w->client_port, machine_guid);
         return rrdpush_receiver_permission_denied(w);
     }
 
+    const char *api_key_type = appconfig_get(&stream_config, key, "type", "api");
+    if(!api_key_type || !*api_key_type) api_key_type = "unknown";
+    if(strcmp(api_key_type, "api") != 0) {
+        rrdhost_system_info_free(system_info);
+        log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - API KEY GIVEN IS NOT API KEY");
+        error("STREAM [receive from [%s]:%s]: API key '%s' is a %s GUID. Forbidding access.", w->client_ip, w->client_port, key, api_key_type);
+        return rrdpush_receiver_permission_denied(w);
+    }
+
     if(!appconfig_get_boolean(&stream_config, key, "enabled", 0)) {
         rrdhost_system_info_free(system_info);
-        log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - KEY NOT ENABLED");
+        log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - KEY NOT ENABLED");
         error("STREAM [receive from [%s]:%s]: API key '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, key);
         return rrdpush_receiver_permission_denied(w);
     }
@@ -791,7 +800,7 @@ int rrdpush_receiver_thread_spawn(struct web_client *w, char *url) {
             if(!simple_pattern_matches(key_allow_from, w->client_ip)) {
                 simple_pattern_free(key_allow_from);
                 rrdhost_system_info_free(system_info);
-                log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname) ? hostname : "-", "ACCESS DENIED - KEY NOT ALLOWED FROM THIS IP");
+                log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - KEY NOT ALLOWED FROM THIS IP");
                 error("STREAM [receive from [%s]:%s]: API key '%s' is not permitted from this IP. Forbidding access.", w->client_ip, w->client_port, key);
                 return rrdpush_receiver_permission_denied(w);
             }
@@ -799,9 +808,18 @@ int rrdpush_receiver_thread_spawn(struct web_client *w, char *url) {
         }
     }
 
+    const char *machine_guid_type = appconfig_get(&stream_config, machine_guid, "type", "machine");
+    if(!machine_guid_type || !*machine_guid_type) machine_guid_type = "unknown";
+    if(strcmp(machine_guid_type, "machine") != 0) {
+        rrdhost_system_info_free(system_info);
+        log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - MACHINE GUID GIVEN IS NOT A MACHINE GUID");
+        error("STREAM [receive from [%s]:%s]: machine GUID '%s' is a %s GUID. Forbidding access.", w->client_ip, w->client_port, machine_guid, machine_guid_type);
+        return rrdpush_receiver_permission_denied(w);
+    }
+
     if(!appconfig_get_boolean(&stream_config, machine_guid, "enabled", 1)) {
         rrdhost_system_info_free(system_info);
-        log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname)?hostname:"-", "ACCESS DENIED - MACHINE GUID NOT ENABLED");
+        log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - MACHINE GUID NOT ENABLED");
         error("STREAM [receive from [%s]:%s]: machine GUID '%s' is not allowed. Forbidding access.", w->client_ip, w->client_port, machine_guid);
         return rrdpush_receiver_permission_denied(w);
     }
@@ -812,7 +830,7 @@ int rrdpush_receiver_thread_spawn(struct web_client *w, char *url) {
             if(!simple_pattern_matches(machine_allow_from, w->client_ip)) {
                 simple_pattern_free(machine_allow_from);
                 rrdhost_system_info_free(system_info);
-                log_stream_connection(w->client_ip, w->client_port, (key && *key)?key:"-", (machine_guid && *machine_guid)?machine_guid:"-", (hostname && *hostname) ? hostname : "-", "ACCESS DENIED - MACHINE GUID NOT ALLOWED FROM THIS IP");
+                log_stream_connection(w->client_ip, w->client_port, key, machine_guid, hostname, "ACCESS DENIED - MACHINE GUID NOT ALLOWED FROM THIS IP");
                 error("STREAM [receive from [%s]:%s]: Machine GUID '%s' is not permitted from this IP. Forbidding access.", w->client_ip, w->client_port, machine_guid);
                 return rrdpush_receiver_permission_denied(w);
             }

streaming/stream.conf

@@ -111,6 +111,11 @@
 [API_KEY]
     # Default settings for this API key
 
+    # This GUID is to be used as an API key from remote agents connecting
+    # to this machine. Failure to match such a key, denies access.
+    # YOU MUST SET THIS FIELD ON ALL API KEYS.
+    type = api
+
     # You can disable the API key, by setting this to: no
     # The default (for unknown API keys) is: no
     enabled = no
@@ -187,6 +192,11 @@
 # you can give settings for each sending host here.
 
 [MACHINE_GUID]
+    # This GUID is to be used as a MACHINE GUID from remote agents connecting
+    # to this machine, not an API key.
+    # YOU MUST SET THIS FIELD ON ALL MACHINE GUIDs.
+    type = machine
+
     # enable this host: yes | no
     # When disabled, the parent will not receive metrics for this host.
     # THIS IS NOT A SECURITY MECHANISM - AN ATTACKER CAN SET ANY OTHER GUID.