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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2010 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "m_sqlv2.h"
#include "m_sqlutils.h"
#include "hash.h"
/* $ModDesc: Allow/Deny connections based upon an arbitary SQL table */
class ModuleSQLAuth : public Module
{
LocalIntExt sqlAuthed;
Module* SQLutils;
Module* SQLprovider;
std::string freeformquery;
std::string killreason;
std::string allowpattern;
std::string databaseid;
bool verbose;
public:
ModuleSQLAuth() : sqlAuthed("sqlauth", this)
{
}
void init()
{
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.");
ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_DATA, "SQL");
if (!prov)
throw ModuleException("Can't find an SQL provider module. Please load one before attempting to load m_sqlauth.");
SQLprovider = prov->creator;
OnRehash(NULL);
Implementation eventlist[] = { I_OnUserDisconnect, I_OnCheckReady, I_OnRehash, I_OnUserRegister };
ServerInstance->Modules->Attach(eventlist, this, 4);
}
virtual ~ModuleSQLAuth()
{
}
void OnRehash(User* user)
{
ConfigReader Conf;
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 */
}
ModResult OnUserRegister(LocalUser* user)
{
if ((!allowpattern.empty()) && (InspIRCd::Match(user->nick,allowpattern)))
{
sqlAuthed.set(user, 1);
return MOD_RES_PASSTHRU;
}
if (!CheckCredentials(user))
{
ServerInstance->Users->QuitUser(user, killreason);
return MOD_RES_DENY;
}
return MOD_RES_PASSTHRU;
}
bool CheckCredentials(LocalUser* user)
{
std::string thisquery = freeformquery;
std::string safepass = user->password;
std::string safegecos = user->fullname;
/* Search and replace the escaped nick and escaped pass into the query */
SearchAndReplace(safepass, std::string("\""), std::string("\\\""));
SearchAndReplace(safegecos, std::string("\""), std::string("\\\""));
SearchAndReplace(thisquery, std::string("$nick"), user->nick);
SearchAndReplace(thisquery, std::string("$pass"), safepass);
SearchAndReplace(thisquery, std::string("$host"), user->host);
SearchAndReplace(thisquery, std::string("$ip"), std::string(user->GetIPString()));
SearchAndReplace(thisquery, std::string("$gecos"), safegecos);
SearchAndReplace(thisquery, std::string("$ident"), user->ident);
SearchAndReplace(thisquery, std::string("$server"), std::string(user->server));
SearchAndReplace(thisquery, std::string("$uuid"), user->uuid);
HashProvider* md5 = ServerInstance->Modules->FindDataService<HashProvider>("hash/md5");
if (md5)
SearchAndReplace(thisquery, std::string("$md5pass"), md5->hexsum(user->password));
HashProvider* sha256 = ServerInstance->Modules->FindDataService<HashProvider>("hash/sha256");
if (sha256)
SearchAndReplace(thisquery, std::string("$sha256pass"), sha256->hexsum(user->password));
/* Build the query */
SQLrequest req = SQLrequest(this, SQLprovider, databaseid, SQLquery(thisquery));
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;
}
void OnRequest(Request& request)
{
if(strcmp(SQLRESID, request.id) == 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 */
sqlAuthed.set(user, 1);
}
else if (verbose)
{
/* No rows in result, this means there was no record matching the user */
ServerInstance->SNO->WriteGlobalSno('a', "Forbidden connection from %s!%s@%s (SQL query returned no matches)", user->nick.c_str(), user->ident.c_str(), user->host.c_str());
}
}
else if (verbose)
{
ServerInstance->SNO->WriteGlobalSno('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());
}
}
else
{
return;
}
if (!sqlAuthed.get(user))
{
ServerInstance->Users->QuitUser(user, killreason);
}
}
}
ModResult OnCheckReady(LocalUser* user)
{
return sqlAuthed.get(user) ? MOD_RES_PASSTHRU : MOD_RES_DENY;
}
Version GetVersion()
{
return Version("Allow/Deny connections based upon an arbitary SQL table", VF_VENDOR);
}
};
MODULE_INIT(ModuleSQLAuth)
|
