#include "m_cap.h"
#include "account.h"
-/* $ModDesc: Provides support for atheme SASL via AUTHENTICATE. */
+/* $ModDesc: Provides support for IRC Authentication Layer (aka: atheme SASL) via AUTHENTICATE. */
+
+enum SaslState { SASL_INIT, SASL_COMM, SASL_DONE };
+enum SaslResult { SASL_OK, SASL_FAIL, SASL_ABORT };
+
+/**
+ * Tracks SASL authentication state like charybdis does. --nenolod
+ */
+class SaslAuthenticator
+{
+ private:
+ InspIRCd *ServerInstance;
+ Module *Creator;
+ std::string agent;
+ User *user;
+ SaslState state;
+ SaslResult result;
+ bool state_announced;
+
+ public:
+ SaslAuthenticator(User *user, std::string method, InspIRCd *instance, Module *ctor)
+ : ServerInstance(instance), Creator(ctor), user(user)
+ {
+ this->user->Extend("sasl_authenticator", this);
+
+ std::deque<std::string> params;
+ params.push_back("*");
+ params.push_back("SASL");
+ params.push_back(user->uuid);
+ params.push_back("*");
+ params.push_back("S");
+ params.push_back(method);
+
+ Event e((char*)¶ms, Creator, "send_encap");
+ e.Send(ServerInstance);
+ }
+
+ SaslResult GetSaslResult(std::string &result)
+ {
+ if (result == "F")
+ return SASL_FAIL;
+
+ if (result == "A")
+ return SASL_ABORT;
+
+ return SASL_OK;
+ }
+
+ /* checks for and deals with a state change. */
+ SaslState ProcessInboundMessage(std::deque<std::string> &msg)
+ {
+ switch (this->state)
+ {
+ case SASL_INIT:
+ this->agent = msg[1];
+ this->user->WriteServ("AUTHENTICATE %s", msg[4].c_str());
+ this->state = SASL_COMM;
+ break;
+ case SASL_COMM:
+ if (msg[1] != this->agent)
+ return this->state;
+
+ if (msg[3] != "D")
+ this->user->WriteServ("AUTHENTICATE %s", msg[4].c_str());
+ else
+ {
+ this->state = SASL_DONE;
+ this->result = this->GetSaslResult(msg[4]);
+ this->AnnounceState();
+ }
+
+ break;
+ default:
+ ServerInstance->Logs->Log("m_sasl", DEFAULT, "WTF: SaslState is not a known state (%d)", this->state);
+ break;
+ }
+
+ return this->state;
+ }
+
+ void SendClientMessage(const char* const* parameters, int pcnt)
+ {
+ if (this->state != SASL_COMM)
+ return;
+
+ std::deque<std::string> params;
+ params.push_back("*");
+ params.push_back("SASL");
+ params.push_back(this->user->uuid);
+ params.push_back(this->agent);
+ params.push_back("C");
+
+ for (int i = 0; i < pcnt; ++i)
+ params.push_back(parameters[i]);
+
+ Event e((char*)¶ms, Creator, "send_encap");
+ e.Send(ServerInstance);
+ }
+
+ void AnnounceState(void)
+ {
+ if (this->state_announced)
+ return;
+
+ switch (this->result)
+ {
+ case SASL_OK:
+ this->user->WriteServ("903 %s :SASL authentication successful", this->user->nick);
+ break;
+ case SASL_ABORT:
+ this->user->WriteServ("906 %s :SASL authentication aborted", this->user->nick);
+ break;
+ case SASL_FAIL:
+ this->user->WriteServ("904 %s :SASL authentication failed", this->user->nick);
+ break;
+ default:
+ break;
+ }
+ }
+
+ ~SaslAuthenticator()
+ {
+ this->AnnounceState();
+ }
+};
class CommandAuthenticate : public Command
{
CmdResult Handle (const char* const* parameters, int pcnt, User *user)
{
- ServerInstance->Logs->Log("m_sasl", DEBUG,"AUTHENTICATE");
+ /* Only allow AUTHENTICATE on unregistered clients */
if (user->registered != REG_ALL)
{
- ServerInstance->Logs->Log("m_sasl", DEBUG,"Sending ENCAP for AUTHENTICATE");
- /* Only allow AUTHENTICATE on unregistered clients */
- std::deque<std::string> params;
- params.push_back("*");
- params.push_back("AUTHENTICATE");
- params.push_back(user->uuid);
-
- for (int i = 0; i < pcnt; ++i)
- params.push_back(parameters[i]);
-
- Event e((char*)¶ms, Creator, "send_encap");
- e.Send(ServerInstance);
+ if (!user->GetExt("sasl"))
+ return CMD_FAILURE;
+
+ SaslAuthenticator *sasl;
+ if (!(user->GetExt("sasl_authenticator", sasl)))
+ sasl = new SaslAuthenticator(user, parameters[0], ServerInstance, Creator);
+ else
+ sasl->SendClientMessage(parameters, pcnt);
}
return CMD_FAILURE;
}
class ModuleSASL : public Module
{
CommandAuthenticate* sasl;
-
public:
ModuleSASL(InspIRCd* Me)
: Module(Me)
{
- Implementation eventlist[] = { I_OnEvent };
- ServerInstance->Modules->Attach(eventlist, this, 1);
+ Implementation eventlist[] = { I_OnEvent, I_OnUserRegister, I_OnPostConnect };
+ ServerInstance->Modules->Attach(eventlist, this, 3);
sasl = new CommandAuthenticate(ServerInstance, this);
ServerInstance->AddCommand(sasl);
+
+ if (!ServerInstance->Modules->Find("m_services_account.so") || !ServerInstance->Modules->Find("m_cap.so"))
+ ServerInstance->Logs->Log("m_sasl", DEFAULT, "WARNING: m_services_account.so and m_cap.so are not loaded! m_sasl.so will NOT function correctly until these two modules are loaded!");
}
+ virtual int OnUserRegister(User *user)
+ {
+ if (user->GetExt("sasl"))
+ {
+ user->WriteServ("906 %s :SASL authentication aborted", user->nick);
+ user->Shrink("sasl");
+ }
+
+ return 0;
+ }
+
+ virtual void OnPostConnect(User* user)
+ {
+ if (!IS_LOCAL(user))
+ return;
+
+ std::string* str = NULL;
+
+ if (user->GetExt("accountname", str))
+ {
+ std::deque<std::string> params;
+ params.push_back(user->uuid);
+ params.push_back("accountname");
+ params.push_back(*str);
+ Event e((char*)¶ms, this, "send_metadata");
+ e.Send(ServerInstance);
+ }
+ return;
+ }
virtual ~ModuleSASL()
{
if (ev->GetEventID() == "encap_received")
{
- /* Received encap reply, look for AUTHENTICATE */
std::deque<std::string>* parameters = (std::deque<std::string>*)ev->GetData();
- User* target = ServerInstance->FindNick((*parameters)[0]);
+ if ((*parameters)[1] != "SASL")
+ return;
- if (target)
+ User* target = ServerInstance->FindNick((*parameters)[2]);
+ SaslAuthenticator *sasl;
+ if (!target->GetExt("sasl_authenticator", sasl))
+ return;
+
+ SaslState state = sasl->ProcessInboundMessage(*parameters);
+ if (state == SASL_DONE)
{
- /* Found a user */
- parameters->pop_front();
- std::string line = irc::stringjoiner(" ", *parameters, 0, parameters->size() - 1).GetJoined();
- target->WriteServ("AUTHENTICATE %s", line.c_str());
+ target->Shrink("sasl_authenticator");
+ delete sasl;
}
}
- else if (ev->GetEventID() == "account_login")
- {
- AccountData* ac = (AccountData*)ev->GetData();
- ac->user->WriteServ("903 %s :SASL authentication successful", ac->user->nick);
- }
}
};