Added page authentication

nomadnet/Directory.py

@@ -32,7 +32,7 @@ class Directory:
             packed_list = []
             for source_hash in self.directory_entries:
                 e = self.directory_entries[source_hash]
-                packed_list.append((e.source_hash, e.display_name, e.trust_level, e.hosts_node, e.preferred_delivery))
+                packed_list.append((e.source_hash, e.display_name, e.trust_level, e.hosts_node, e.preferred_delivery, e.identify))
 
             directory = {
                 "entry_list": packed_list,
@@ -65,7 +65,12 @@ class Directory:
                     else:
                         preferred_delivery = None
 
-                    entries[e[0]] = DirectoryEntry(e[0], e[1], e[2], hosts_node, preferred_delivery=preferred_delivery)
+                    if len(e) > 5:
+                        identify = e[5]
+                    else:
+                        identify = False
+
+                    entries[e[0]] = DirectoryEntry(e[0], e[1], e[2], hosts_node, preferred_delivery=preferred_delivery, identify_on_connect=identify)
 
                 self.directory_entries = entries
 
@@ -183,6 +188,18 @@ class Directory:
         except Exception as e:
             return False
 
+    def should_identify_on_connect(self, source_hash):
+        if source_hash in self.directory_entries:
+            entry = self.directory_entries[source_hash]
+            return entry.identify
+        else:
+            return False
+
+    def set_identify_on_connect(self, source_hash, state):
+        if source_hash in self.directory_entries:
+            entry = self.directory_entries[source_hash]
+            entry.identify = state
+    
     def known_nodes(self):
         node_list = []
         for eh in self.directory_entries:
@@ -214,7 +231,7 @@ class DirectoryEntry:
     DIRECT     = 0x01
     PROPAGATED = 0x02
 
-    def __init__(self, source_hash, display_name=None, trust_level=UNKNOWN, hosts_node=False, preferred_delivery=None):
+    def __init__(self, source_hash, display_name=None, trust_level=UNKNOWN, hosts_node=False, preferred_delivery=None, identify_on_connect=False):
         if len(source_hash) == RNS.Identity.TRUNCATED_HASHLENGTH//8:
             self.source_hash  = source_hash
             self.display_name = display_name
@@ -228,5 +245,6 @@ class DirectoryEntry:
 
             self.trust_level  = trust_level
             self.hosts_node   = hosts_node
+            self.identify     = identify_on_connect
         else:
             raise TypeError("Attempt to add invalid source hash to directory")

nomadnet/Node.py

@@ -79,6 +79,7 @@ class Node:
         directories = [file for file in os.listdir(base_path) if os.path.isdir(os.path.join(base_path, file)) and file[:1] != "."]
 
         for file in files:
+            if not file.endswith(".allowed"):
                 self.servedpages.append(base_path+"/"+file)
 
         for directory in directories:
@@ -96,8 +97,51 @@ class Node:
 
     def serve_page(self, path, data, request_id, remote_identity, requested_at):
         RNS.log("Page request "+RNS.prettyhexrep(request_id)+" for: "+str(path), RNS.LOG_VERBOSE)
+
         file_path = path.replace("/page", self.app.pagespath, 1)
+
+        allowed_path = file_path+".allowed"
+        request_allowed = False
+
+        if os.path.isfile(allowed_path):
+            allowed_list = []
+
             try:
+                if os.access(allowed_path, os.X_OK):
+                    allowed_result = subprocess.run([allowed_path], stdout=subprocess.PIPE)
+                    allowed_input = allowed_result.stdout
+
+                else:
+                    fh = open(allowed_path, "rb")
+                    allowed_input = fh.read()
+                    fh.close()
+
+                allowed_hash_strs = allowed_input.splitlines()
+
+                for hash_str in allowed_hash_strs:
+                    if len(hash_str) == RNS.Identity.TRUNCATED_HASHLENGTH//8*2:
+                        try:
+                            allowed_hash = bytes.fromhex(hash_str.decode("utf-8"))
+                            allowed_list.append(allowed_hash)
+
+                        except Exception as e:
+                            RNS.log("Could not decode RNS Identity hash from: "+str(hash_str), RNS.LOG_DEBUG)
+                            RNS.log("The contained exception was: "+str(e), RNS.LOG_DEBUG)
+
+            except Exception as e:
+                RNS.log("Error while fetching list of allowed identities for request: "+str(e), RNS.LOG_ERROR)
+
+            if remote_identity.hash in allowed_list:
+                request_allowed = True
+            else:
+                request_allowed = False
+                RNS.log("Denying request, remote identity was not in list of allowed identities", RNS.LOG_VERBOSE)
+
+        else:
+            request_allowed = True
+
+        try:
+            if request_allowed:
                 RNS.log("Serving page: "+file_path, RNS.LOG_VERBOSE)
                 if os.access(file_path, os.X_OK):
                     generated = subprocess.run([file_path], stdout=subprocess.PIPE)
@@ -107,6 +151,9 @@ class Node:
                     response_data = fh.read()
                     fh.close()
                     return response_data
+            else:
+                RNS.log("Request denied", RNS.LOG_VERBOSE)
+                return DEFAULT_NOTALLOWED.encode("utf-8")
 
         except Exception as e:
             RNS.log("Error occurred while handling request "+RNS.prettyhexrep(request_id)+" for: "+str(path), RNS.LOG_ERROR)
@@ -161,3 +208,8 @@ This node is serving pages, but the home page file (index.mu) was not found in t
 
 If you are the node operator, you can define your own home page by creating a file named `*index.mu`* in the page storage directory.
 '''
+
+DEFAULT_NOTALLOWED = '''>Request Not Allowed
+
+You are not authorised to carry out the request.
+'''

nomadnet/ui/textui/Browser.py

@@ -643,6 +643,10 @@ class Browser:
     def link_established(self, link):
         self.status = Browser.LINK_ESTABLISHED
 
+        if self.app.directory.should_identify_on_connect(self.destination_hash):
+            RNS.log("Link established, identifying to remote system...", RNS.LOG_VERBOSE)
+            self.link.identify(self.app.identity)
+
 
     def link_closed(self, link):
         if self.status == Browser.DISCONECTED or self.status == Browser.DONE:

nomadnet/ui/textui/Network.py

@@ -443,7 +443,11 @@ class KnownNodeInfo(urwid.WidgetWrap):
         def pn_change(sender, userdata):
             self.pn_changed = True
 
+        def ident_change(sender, userdata):
+            pass
+
         propagation_node_checkbox = urwid.CheckBox("Use as default propagation node", state=(self.app.get_user_selected_propagation_node() == source_hash), on_state_change=pn_change)
+        connect_identify_checkbox = urwid.CheckBox("Identify when connecting", state=self.app.directory.should_identify_on_connect(source_hash), on_state_change=ident_change)
 
         def save_node(sender):
             if self.pn_changed:
@@ -461,7 +465,7 @@ class KnownNodeInfo(urwid.WidgetWrap):
 
             display_str = e_name.get_edit_text()
 
-            node_entry = DirectoryEntry(source_hash, display_name=display_str, trust_level=trust_level, hosts_node=True)
+            node_entry = DirectoryEntry(source_hash, display_name=display_str, trust_level=trust_level, hosts_node=True, identify_on_connect=connect_identify_checkbox.get_state())
             self.app.directory.remember(node_entry)
             self.app.ui.main_display.sub_displays.network_display.directory_change_callback()
             show_known_nodes(None)
@@ -479,6 +483,7 @@ class KnownNodeInfo(urwid.WidgetWrap):
             # urwid.Text(["Trust     : ", (style, trust_str)], align="left"),
             urwid.Divider(g["divider1"]),
             propagation_node_checkbox,
+            connect_identify_checkbox,
             urwid.Divider(g["divider1"]),
             r_untrusted,
             r_unknown,
@@ -793,7 +798,8 @@ class LocalPeer(urwid.WidgetWrap):
         if display_name == None:
             display_name = ""
 
-        t_id = urwid.Text("Addr : "+RNS.hexrep(self.app.lxmf_destination.hash, delimit=False))
+        t_id =           urwid.Text("LXMF Addr : "+RNS.prettyhexrep(self.app.lxmf_destination.hash))
+        i_id =           urwid.Text("Identity  : "+RNS.prettyhexrep(self.app.identity.hash))
         e_name = urwid.Edit(caption="Name      : ", edit_text=display_name)
 
         def save_query(sender):
@@ -858,6 +864,7 @@ class LocalPeer(urwid.WidgetWrap):
         self.display_widget = urwid.Pile(
             [
                 t_id,
+                i_id,
                 e_name,
                 urwid.Divider(g["divider1"]),
                 self.t_last_announce,