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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "m_sqlv2.h"
#include "m_sqlutils.h"
#include "m_hash.h"
/* $ModDesc: Allow/Deny connections based upon an arbitary SQL table */
/* $ModDep: m_sqlv2.h m_sqlutils.h m_hash.h */
class ModuleSQLAuth : public Module
{
Module* SQLutils;
Module* SQLprovider;
std::string freeformquery;
std::string killreason;
std::string allowpattern;
std::string databaseid;
bool verbose;
public:
ModuleSQLAuth(InspIRCd* Me)
: Module(Me)
{
ServerInstance->Modules->UseInterface("SQLutils");
ServerInstance->Modules->UseInterface("SQL");
SQLutils = ServerInstance->Modules->Find("m_sqlutils.so");
if (!SQLutils)
throw ModuleException("Can't find m_sqlutils.so. Please load m_sqlutils.so before m_sqlauth.so.");
SQLprovider = ServerInstance->Modules->FindFeature("SQL");
if (!SQLprovider)
throw ModuleException("Can't find an SQL provider module. Please load one before attempting to load m_sqlauth.");
OnRehash(NULL,"");
Implementation eventlist[] = { I_OnUserDisconnect, I_OnCheckReady, I_OnRequest, I_OnRehash, I_OnUserRegister };
ServerInstance->Modules->Attach(eventlist, this, 5);
}
virtual ~ModuleSQLAuth()
{
ServerInstance->Modules->DoneWithInterface("SQL");
ServerInstance->Modules->DoneWithInterface("SQLutils");
}
virtual void OnRehash(User* user, const std::string ¶meter)
{
ConfigReader Conf(ServerInstance);
databaseid = Conf.ReadValue("sqlauth", "dbid", 0); /* Database ID, given to the SQL service provider */
freeformquery = Conf.ReadValue("sqlauth", "query", 0); /* Field name where username can be found */
killreason = Conf.ReadValue("sqlauth", "killreason", 0); /* Reason to give when access is denied to a user (put your reg details here) */
allowpattern = Conf.ReadValue("sqlauth", "allowpattern",0 ); /* Allow nicks matching this pattern without requiring auth */
verbose = Conf.ReadFlag("sqlauth", "verbose", 0); /* Set to true if failed connects should be reported to operators */
}
virtual int OnUserRegister(User* user)
{
if ((!allowpattern.empty()) && (InspIRCd::Match(user->nick,allowpattern)))
{
user->Extend("sqlauthed");
return 0;
}
if (!CheckCredentials(user))
{
ServerInstance->Users->QuitUser(user, killreason);
return 1;
}
return 0;
}
void SearchAndReplace(std::string& newline, const std::string &find, const std::string &replace)
{
std::string::size_type x = newline.find(find);
while (x != std::string::npos)
{
newline.erase(x, find.length());
if (!replace.empty())
newline.insert(x, replace);
x = newline.find(find);
}
}
bool CheckCredentials(User* user)
{
std::string thisquery = freeformquery;
std::string safepass = user->password;
/* Search and replace the escaped nick and escaped pass into the query */
SearchAndReplace(safepass, "\"", "");
SearchAndReplace(thisquery, "$nick", user->nick);
SearchAndReplace(thisquery, "$pass", safepass);
SearchAndReplace(thisquery, "$host", user->host);
SearchAndReplace(thisquery, "$ip", user->GetIPString());
Module* HashMod = ServerInstance->Modules->Find("m_md5.so");
if (HashMod)
{
HashResetRequest(this, HashMod).Send();
SearchAndReplace(thisquery, "$md5pass", HashSumRequest(this, HashMod, user->password).Send());
}
HashMod = ServerInstance->Modules->Find("m_sha256.so");
if (HashMod)
{
HashResetRequest(this, HashMod).Send();
SearchAndReplace(thisquery, "$sha256pass", HashSumRequest(this, HashMod, user->password).Send());
}
/* Build the query */
SQLrequest req = SQLrequest(this, SQLprovider, databaseid, SQLquery(thisquery));
if(req.Send())
{
/* When we get the query response from the service provider we will be given an ID to play with,
* just an ID number which is unique to this query. We need a way of associating that ID with a User
* so we insert it into a map mapping the IDs to users.
* Thankfully m_sqlutils provides this, it will associate a ID with a user or channel, and if the user quits it removes the
* association. This means that if the user quits during a query we will just get a failed lookup from m_sqlutils - telling
* us to discard the query.
*/
AssociateUser(this, SQLutils, req.id, user).Send();
return true;
}
else
{
if (verbose)
ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (SQL query failed: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), req.error.Str());
return false;
}
}
virtual const char* OnRequest(Request* request)
{
if(strcmp(SQLRESID, request->GetId()) == 0)
{
SQLresult* res = static_cast<SQLresult*>(request);
User* user = GetAssocUser(this, SQLutils, res->id).S().user;
UnAssociate(this, SQLutils, res->id).S();
if(user)
{
if(res->error.Id() == SQL_NO_ERROR)
{
if(res->Rows())
{
/* We got a row in the result, this is enough really */
user->Extend("sqlauthed");
}
else if (verbose)
{
/* No rows in result, this means there was no record matching the user */
ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (SQL query returned no matches)", user->nick.c_str(), user->ident.c_str(), user->host.c_str());
user->Extend("sqlauth_failed");
}
}
else if (verbose)
{
ServerInstance->SNO->WriteToSnoMask('A', "Forbidden connection from %s!%s@%s (SQL query failed: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), res->error.Str());
user->Extend("sqlauth_failed");
}
}
else
{
return NULL;
}
if (!user->GetExt("sqlauthed"))
{
ServerInstance->Users->QuitUser(user, killreason);
}
return SQLSUCCESS;
}
return NULL;
}
virtual void OnUserDisconnect(User* user)
{
user->Shrink("sqlauthed");
user->Shrink("sqlauth_failed");
}
virtual bool OnCheckReady(User* user)
{
return user->GetExt("sqlauthed");
}
virtual Version GetVersion()
{
return Version("$Id$", VF_VENDOR, API_VERSION);
}
};
MODULE_INIT(ModuleSQLAuth)
|
