1
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 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 "configreader.h"
#include "m_sqlv2.h"
#include "m_sqlutils.h"
#include "m_hash.h"
#include "commands/cmd_oper.h"
/* $ModDesc: Allows storage of oper credentials in an SQL table */
/* $ModDep: m_sqlv2.h m_sqlutils.h */
class ModuleSQLOper : public Module
{
Module* SQLutils;
Module* HashModule;
std::string databaseid;
public:
ModuleSQLOper(InspIRCd* Me)
: Module::Module(Me)
{
ServerInstance->UseInterface("SQLutils");
ServerInstance->UseInterface("SQL");
ServerInstance->UseInterface("HashRequest");
/* Attempt to locate the md5 service provider, bail if we can't find it */
HashModule = ServerInstance->FindModule("m_md5.so");
if (!HashModule)
throw ModuleException("Can't find m_md5.so. Please load m_md5.so before m_sqloper.so.");
SQLutils = ServerInstance->FindModule("m_sqlutils.so");
if (!SQLutils)
throw ModuleException("Can't find m_sqlutils.so. Please load m_sqlutils.so before m_sqloper.so.");
OnRehash(NULL,"");
}
virtual ~ModuleSQLOper()
{
ServerInstance->DoneWithInterface("SQL");
ServerInstance->DoneWithInterface("SQLutils");
ServerInstance->DoneWithInterface("HashRequest");
}
void Implements(char* List)
{
List[I_OnRequest] = List[I_OnRehash] = List[I_OnPreCommand] = 1;
}
virtual void OnRehash(userrec* user, const std::string ¶meter)
{
ConfigReader Conf(ServerInstance);
databaseid = Conf.ReadValue("sqloper", "dbid", 0); /* Database ID of a database configured for the service provider module */
}
virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
{
if ((validated) && (command == "OPER"))
{
if (LookupOper(user, parameters[0], parameters[1]))
{
/* Returning true here just means the query is in progress, or on it's way to being
* in progress. Nothing about the /oper actually being successful..
* If the oper lookup fails later, we pass the command to the original handler
* for /oper by calling its Handle method directly.
*/
return 1;
}
}
return 0;
}
bool LookupOper(userrec* user, const std::string &username, const std::string &password)
{
Module* target;
target = ServerInstance->FindFeature("SQL");
if (target)
{
/* Reset hash module first back to MD5 standard state */
HashResetRequest(this, HashModule).Send();
/* Make an MD5 hash of the password for using in the query */
std::string md5_pass_hash = HashSumRequest(this, HashModule, password.c_str()).Send();
/* We generate our own MD5 sum here because some database providers (e.g. SQLite) dont have a builtin md5 function,
* also hashing it in the module and only passing a remote query containing a hash is more secure.
*/
SQLrequest req = SQLreq(this, target, databaseid, "SELECT username, password, hostname, type FROM ircd_opers WHERE username = '?' AND password='?'", username, md5_pass_hash);
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 userrec
* 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();
user->Extend("oper_user", strdup(username.c_str()));
user->Extend("oper_pass", strdup(password.c_str()));
return true;
}
else
{
return false;
}
}
else
{
ServerInstance->Log(SPARSE, "WARNING: Couldn't find SQL provider module. NOBODY will be able to oper up unless their o:line is statically configured");
return false;
}
}
virtual char* OnRequest(Request* request)
{
if (strcmp(SQLRESID, request->GetId()) == 0)
{
SQLresult* res = static_cast<SQLresult*>(request);
userrec* user = GetAssocUser(this, SQLutils, res->id).S().user;
UnAssociate(this, SQLutils, res->id).S();
char* tried_user = NULL;
char* tried_pass = NULL;
user->GetExt("oper_user", tried_user);
user->GetExt("oper_pass", tried_pass);
if (user)
{
if (res->error.Id() == NO_ERROR)
{
if (res->Rows())
{
/* We got a row in the result, this means there was a record for the oper..
* now we just need to check if their host matches, and if it does then
* oper them up.
*
* We now (previous versions of the module didn't) support multiple SQL
* rows per-oper in the same way the config file does, all rows will be tried
* until one is found which matches. This is useful to define several different
* hosts for a single oper.
*
* The for() loop works as SQLresult::GetRowMap() returns an empty map when there
* are no more rows to return.
*/
for (SQLfieldMap& row = res->GetRowMap(); row.size(); row = res->GetRowMap())
{
if (OperUser(user, row["username"].d, row["password"].d, row["hostname"].d, row["type"].d))
{
/* If/when one of the rows matches, stop checking and return */
return SQLSUCCESS;
}
if (tried_user && tried_pass)
{
LoginFail(user, tried_user, tried_pass);
free(tried_user);
free(tried_pass);
user->Shrink("oper_user");
user->Shrink("oper_pass");
}
}
}
else
{
/* No rows in result, this means there was no oper line for the user,
* we should have already checked the o:lines so now we need an
* "insufficient awesomeness" (invalid credentials) error
*/
if (tried_user && tried_pass)
{
LoginFail(user, tried_user, tried_pass);
free(tried_user);
free(tried_pass);
user->Shrink("oper_user");
user->Shrink("oper_pass");
}
}
}
else
{
/* This one shouldn't happen, the query failed for some reason.
* We have to fail the /oper request and give them the same error
* as above.
*/
if (tried_user && tried_pass)
{
LoginFail(user, tried_user, tried_pass);
free(tried_user);
free(tried_pass);
user->Shrink("oper_user");
user->Shrink("oper_pass");
}
}
}
return SQLSUCCESS;
}
return NULL;
}
void LoginFail(userrec* user, const std::string &username, const std::string &pass)
{
command_t* oper_command = ServerInstance->Parser->GetHandler("OPER");
if (oper_command)
{
const char* params[] = { username.c_str(), pass.c_str() };
oper_command->Handle(params, 2, user);
}
else
{
ServerInstance->Log(DEBUG, "BUG: WHAT?! Why do we have no OPER command?!");
}
}
bool OperUser(userrec* user, const std::string &username, const std::string &password, const std::string &pattern, const std::string &type)
{
ConfigReader Conf(ServerInstance);
for (int j = 0; j < Conf.Enumerate("type"); j++)
{
std::string tname = Conf.ReadValue("type","name",j);
std::string hostname(user->ident);
hostname.append("@").append(user->host);
if ((tname == type) && OneOfMatches(hostname.c_str(), user->GetIPString(), pattern.c_str()))
{
/* Opertype and host match, looks like this is it. */
std::string operhost = Conf.ReadValue("type", "host", j);
if (operhost.size())
user->ChangeDisplayedHost(operhost.c_str());
ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s", user->nick, user->ident, user->host, type.c_str());
user->WriteServ("381 %s :You are now an IRC operator of type %s", user->nick, type.c_str());
if (!user->modes[UM_OPERATOR])
user->Oper(type);
return true;
}
}
return false;
}
virtual Version GetVersion()
{
return Version(1,1,1,0,VF_VENDOR,API_VERSION);
}
};
MODULE_INIT(ModuleSQLOper);
|
