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|
/* +------------------------------------+
* | 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"
/* $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
{
LocalStringExt saved_user;
LocalStringExt saved_pass;
Module* SQLutils;
std::string databaseid;
std::string hashtype;
parameterlist names;
public:
ModuleSQLOper() : saved_user("sqloper_user", this), saved_pass("sqloper_pass", this)
{
OnRehash(NULL);
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_OnRehash, I_OnPreCommand, I_OnLoadModule };
ServerInstance->Modules->Attach(eventlist, this, 3);
ServerInstance->Modules->AddService(saved_user);
ServerInstance->Modules->AddService(saved_pass);
}
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 OnRehash(User* user)
{
ConfigReader Conf;
databaseid = Conf.ReadValue("sqloper", "dbid", 0); /* Database ID of a database configured for the service provider module */
hashtype = Conf.ReadValue("sqloper", "hash", 0);
}
virtual ModResult 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 MOD_RES_DENY;
}
}
return MOD_RES_PASSTHRU;
}
bool LookupOper(User* user, const std::string &username, const std::string &password)
{
ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_DATA, "SQL");
if (prov)
{
Module* target = prov->creator;
HashProvider* hash = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + hashtype);
/* Make an MD5 hash of the password for using in the query */
std::string md5_pass_hash = hash ? hash->hexsum(password) : password;
/* 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);
/* 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();
saved_user.set(user, username);
saved_pass.set(user, password);
return true;
}
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;
}
}
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)
{
std::string* tried_user = saved_user.get(user);
std::string* tried_pass = saved_pass.get(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 */
saved_user.unset(user);
saved_pass.unset(user);
}
if (tried_user && tried_pass)
{
LoginFail(user, *tried_user, *tried_pass);
saved_user.unset(user);
saved_pass.unset(user);
}
}
}
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);
saved_user.unset(user);
saved_pass.unset(user);
}
}
}
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);
saved_user.unset(user);
saved_pass.unset(user);
}
}
}
}
}
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)
{
OperIndex::iterator iter = ServerInstance->Config->oper_blocks.find(" " + type);
if (iter == ServerInstance->Config->oper_blocks.end())
return false;
OperInfo* ifo = iter->second;
std::string hostname(user->ident);
hostname.append("@").append(user->host);
if (OneOfMatches(hostname.c_str(), user->GetIPString(), pattern.c_str()))
{
/* Opertype and host match, looks like this is it. */
user->Oper(ifo);
return true;
}
return false;
}
Version GetVersion()
{
return Version("Allows storage of oper credentials in an SQL table", VF_VENDOR);
}
};
MODULE_INIT(ModuleSQLOper)
|
