From c513e4db1cd7fdbecd59c6d385bc5f970827401e Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Thu, 5 Dec 2013 15:37:09 +0100
Subject: Add login/logout.

---
 src/connectionhandler.cc | 17 +++++++++++++++++
 src/connectionhandler.h  |  7 +++++++
 src/message.h            | 10 +++++++++-
 src/messagehandler.cc    | 15 +++++++++++++++
 src/messageparser.cc     | 22 ++++++++++++++++++++--
 5 files changed, 68 insertions(+), 3 deletions(-)

diff --git a/src/connectionhandler.cc b/src/connectionhandler.cc
index d78c053..fe83861 100644
--- a/src/connectionhandler.cc
+++ b/src/connectionhandler.cc
@@ -56,6 +56,23 @@ void ConnectionHandler::close(clientid_t clientid)
   DEBUG(conn, "Removed connection\n");
 }
 
+void ConnectionHandler::login(clientid_t clientid, std::string user, std::string password)
+{
+  authlist[clientid] = (password == "hundemad");
+  DEBUG(conn, "Authentication %d\n", authlist[clientid]);
+}
+
+void ConnectionHandler::logout(clientid_t clientid)
+{
+  authlist[clientid] = false;
+  DEBUG(conn, "Authentication %d\n", authlist[clientid]);
+}
+
+bool ConnectionHandler::authenticated(clientid_t clientid)
+{
+  return authlist.find(clientid) != authlist.end() && authlist[clientid];
+}
+
 void ConnectionHandler::observe(clientid_t clientid, taskid_t taskid)
 {
   connlist[clientid].insert(taskid);
diff --git a/src/connectionhandler.h b/src/connectionhandler.h
index 7779b1f..402f531 100644
--- a/src/connectionhandler.h
+++ b/src/connectionhandler.h
@@ -38,6 +38,7 @@
 
 typedef struct libwebsocket* clientid_t;
 
+typedef std::map<clientid_t, bool> AuthList;
 typedef std::map<clientid_t, std::set<taskid_t> > ConnectionList;
 typedef std::list<std::pair<clientid_t, taskid_t> > ObserverList;
 
@@ -47,6 +48,11 @@ public:
 
   void init(clientid_t clientid);
   void close(clientid_t clientid);
+
+  void login(clientid_t clientid, std::string user, std::string password);
+  void logout(clientid_t clientid);
+  bool authenticated(clientid_t clientid);
+
   void observe(clientid_t clientid, taskid_t taskid);
   void unobserve(clientid_t clientid, taskid_t taskid);
 
@@ -55,6 +61,7 @@ public:
 
 private:
   ConnectionList connlist;
+  AuthList authlist;
 };
 
 // Global ConnectionHandler
diff --git a/src/message.h b/src/message.h
index 92e58ac..6e1804d 100644
--- a/src/message.h
+++ b/src/message.h
@@ -41,10 +41,17 @@ namespace cmd {
     move,
     create,
     remove,
-    error 
+    login,
+    logout,
+    error,
   } cmd_t;
 };
 
+typedef struct {
+  std::string user;
+  std::string password;
+} login_t;
+
 typedef struct {
   taskid_t id;
 } observe_t;
@@ -83,6 +90,7 @@ typedef struct {
   remove_t remove;
   move_t move;
   update_t update;
+  login_t login;
 
   TaskIdList nodes;
 
diff --git a/src/messagehandler.cc b/src/messagehandler.cc
index d3c3420..c946bbe 100644
--- a/src/messagehandler.cc
+++ b/src/messagehandler.cc
@@ -44,6 +44,13 @@ MessageList handle_msg(MessageList msgList, clientid_t wsi) {
       it++) {
     message_t &m = *it;
     
+    if(m.cmd == cmd::login) {
+      connection_handler.login(wsi, m.login.user, m.login.password);
+    }
+
+    // If client is not authenticated; do not continue beyond this point...
+    if(!connection_handler.authenticated(wsi)) continue;
+
     switch(m.cmd) {
     case cmd::create: 
       {
@@ -166,6 +173,14 @@ MessageList handle_msg(MessageList msgList, clientid_t wsi) {
       }
       break;
 
+    case cmd::login:
+      // Already handled, before this switch ... case
+      break;
+
+    case cmd::logout:
+      connection_handler.logout(wsi);
+      break;
+
     case cmd::error:
       ERR(messagehandler, "An error occurred.\n");
       break;
diff --git a/src/messageparser.cc b/src/messageparser.cc
index 4f047d9..409ffeb 100644
--- a/src/messageparser.cc
+++ b/src/messageparser.cc
@@ -94,7 +94,7 @@ inline static void parse_into_msg_tokens(std::string& data,
     tokenVector.clear();
   }
 
-
+  /* // WARNING: Enabling this will print passwords in plaintext...
   // Debug: print tokens
   DEBUG(parser, "tokenlists: %d\n", msgTokensList.size());
   MsgTokensList::iterator j = msgTokensList.begin();
@@ -108,7 +108,7 @@ inline static void parse_into_msg_tokens(std::string& data,
     }
     j++;
   }
-
+  */
 }
 
 static taskid_t getId(std::map<std::string, taskid_t> &sym, std::string token)
@@ -156,6 +156,8 @@ inline static void create_msg_list(MsgTokensList& msgTokensList,
 
     if(t[origin] == "observe") m.cmd = cmd::observe;
     else if(t[origin] == "unobserve") m.cmd = cmd::unobserve;
+    else if(t[origin] == "login") m.cmd = cmd::login;
+    else if(t[origin] == "logout") m.cmd = cmd::logout;
     else if(t[origin] == "create") m.cmd = cmd::create;
     else if(t[origin] == "remove") m.cmd = cmd::remove;
     else if(t[origin] == "move") m.cmd = cmd::move;
@@ -180,6 +182,22 @@ inline static void create_msg_list(MsgTokensList& msgTokensList,
         DEBUG(msgparser, "unobserve @ %d\n", m.unobserve.id);
         break;
       }
+      case cmd::login: {
+        if(t.size() != origin+1+2) { 
+          DEBUG(msgparser, "Wrong number of parameters\n");
+          continue;
+        }
+        m.login.user = t[origin+1];
+        m.login.password = t[origin+2];
+        DEBUG(msgparser, "login %s\n", m.login.user.c_str());
+        break;
+      }
+      case cmd::logout:
+        if(t.size() != origin+1) { 
+          DEBUG(msgparser, "Wrong number of parameters\n");
+          continue;
+        }
+        break;
       case cmd::create: {
         if(!clientmode && t.size() != origin+1+2) { 
           DEBUG(msgparser, "Wrong number of parameters\n");
-- 
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