/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 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 "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 m_hash.h */
typedef std::map<irc::string, Module*> hashymodules;
class ModuleSQLOper : public Module
{
Module* SQLutils;
std::string databaseid;
irc::string hashtype;
hashymodules hashers;
bool diduseiface;
std::deque<std::string> names;
public:
ModuleSQLOper(InspIRCd* Me)
: Module(Me)
{
ServerInstance->Modules->UseInterface("SQLutils");
ServerInstance->Modules->UseInterface("SQL");
ServerInstance->Modules->UseInterface("HashRequest");
OnRehash(NULL);
diduseiface = false;
/* Find all modules which implement the interface 'HashRequest' */
modulelist* ml = ServerInstance->Modules->FindInterface("HashRequest");
/* Did we find any modules? */
if (ml)
{
/* Yes, enumerate them all to find out the hashing algorithm name */
for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
{
/* Make a request to it for its name, its implementing
* HashRequest so we know its safe to do this
*/
std::string name = HashNameRequest(this, *m).Send();
/* Build a map of them */
hashers[name.c_str()] = *m;
names.push_back(name);
}
/* UseInterface doesn't do anything if there are no providers, so we'll have to call it later if a module gets loaded later on. */
diduseiface = true;
ServerInstance->Modules->UseInterface("HashRequest");
}
SQLutils = ServerInstance->Modules->Find("m_sqlutils.so");
if (!SQLutils)
throw ModuleException("Can't find m_sqlutils.so. Please load m_sqlutils.so before m_sqloper.so.");
Implementation eventlist[] = { I_OnRequest, I_OnRehash, I_OnPreCommand, I_OnLoadModule };
ServerInstance->Modules->Attach(eventlist, this, 3);
}
bool OneOfMatches(const char* host, const char* ip, const char* hostlist)
{
std::stringstream hl(hostlist);
std::string xhost;
while (hl >> xhost)
{
if (InspIRCd::Match(host, xhost, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(ip, xhost, ascii_case_insensitive_map))
{
return true;
}
}
return false;
}
virtual void OnLoadModule(Module* mod, const std::string& name)
{
if (ServerInstance->Modules->ModuleHasInterface(mod, "HashRequest"))
{
ServerInstance->Logs->Log("m_sqloper",DEBUG, "Post-load registering hasher: %s", name.c_str());
std::string sname = HashNameRequest(this, mod).Send();
hashers[sname.c_str()] = mod;
names.push_back(sname);
if (!diduseiface)
{
ServerInstance->Modules->UseInterface("HashRequest");
diduseiface = true;
}
}
}
virtual ~ModuleSQLOper()
{
ServerInstance->Modules->DoneWithInterface("SQL");
ServerInstance->Modules->DoneWithInterface("SQLutils");
if (diduseiface)
ServerInstance->Modules->DoneWithInterface("HashRequest");
}
virtual void OnRehash(User* user)
{
ConfigReader Conf(ServerInstance);
databaseid = Conf.ReadValue("sqloper", "dbid", 0); /* Database ID of a database configured for the service provider module */
hashtype = assign(Conf.ReadValue("sqloper", "hash", 0));
}
virtual int OnPreCommand(std::string &command, std::vector<std::string> ¶meters, User *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(User* user, const std::string &username, const std::string &password)
{
Module* target;
target = ServerInstance->Modules->FindFeature("SQL");
if (target)
{
hashymodules::iterator x = hashers.find(hashtype);
if (x == hashers.end())
return false;
/* Reset hash module first back to MD5 standard state */
HashResetRequest(this, x->second).Send();
/* Make an MD5 hash of the password for using in the query */
std::string md5_pass_hash = HashSumRequest(this, x->second, password.c_str()).Send();
/* We generate our own sum here because some database providers (e.g. SQLite) dont have a builtin md5/sha256 function,
* also hashing it in the module and only passing a remote query containing a hash is more secure.
*/
SQLrequest req = SQLrequest(this, target, databaseid,
SQLquery("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 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();
user->Extend("oper_user", strdup(username.c_str()));
user->Extend("oper_pass", strdup(password.c_str()));
return true;
}
else
{
return false;
}
}
else
{
ServerInstance->Logs->Log("m_sqloper",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 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();
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() == SQL_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["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(User* user, const std::string &username, const std::string &pass)
{
Command* oper_command = ServerInstance->Parser->GetHandler("OPER");
if (oper_command)
{
std::vector<std::string> params;
params.push_back(username);
params.push_back(pass);
oper_command->Handle(params, user);
}
else
{
ServerInstance->Logs->Log("m_sqloper",DEBUG, "BUG: WHAT?! Why do we have no OPER command?!");
}
}
bool OperUser(User* user, 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());
user->Oper(type, tname);
return true;
}
}
return false;
}
virtual Version GetVersion()
{
return Version("$Id$", VF_VENDOR, API_VERSION);
}
};
MODULE_INIT(ModuleSQLOper)
