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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "modules/sql.h"
#include "modules/hash.h"
#include "modules/ssl.h"
enum AuthState {
AUTH_STATE_NONE = 0,
AUTH_STATE_BUSY = 1,
AUTH_STATE_FAIL = 2
};
class AuthQuery : public SQL::Query
{
public:
const std::string uid;
LocalIntExt& pendingExt;
bool verbose;
const std::string& kdf;
const std::string& pwcolumn;
AuthQuery(Module* me, const std::string& u, LocalIntExt& e, bool v, const std::string& kd, const std::string& pwcol)
: SQL::Query(me)
, uid(u)
, pendingExt(e)
, verbose(v)
, kdf(kd)
, pwcolumn(pwcol)
{
}
void OnResult(SQL::Result& res) CXX11_OVERRIDE
{
LocalUser* user = static_cast<LocalUser*>(ServerInstance->FindUUID(uid));
if (!user)
return;
if (res.Rows())
{
if (!kdf.empty())
{
HashProvider* hashprov = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + kdf);
if (!hashprov)
{
if (verbose)
ServerInstance->SNO->WriteGlobalSno('a', "Forbidden connection from %s (a provider for %s was not loaded)", user->GetFullRealHost().c_str(), kdf.c_str());
pendingExt.set(user, AUTH_STATE_FAIL);
return;
}
size_t colindex = 0;
if (!pwcolumn.empty() && !res.HasColumn(pwcolumn, colindex))
{
if (verbose)
ServerInstance->SNO->WriteGlobalSno('a', "Forbidden connection from %s (the column specified (%s) was not returned)", user->GetFullRealHost().c_str(), pwcolumn.c_str());
pendingExt.set(user, AUTH_STATE_FAIL);
return;
}
SQL::Row row;
while (res.GetRow(row))
{
if (hashprov->Compare(user->password, row[colindex]))
{
pendingExt.set(user, AUTH_STATE_NONE);
return;
}
}
if (verbose)
ServerInstance->SNO->WriteGlobalSno('a', "Forbidden connection from %s (Password from the SQL query did not match the user provided password)", user->GetFullRealHost().c_str());
pendingExt.set(user, AUTH_STATE_FAIL);
return;
}
pendingExt.set(user, AUTH_STATE_NONE);
}
else
{
if (verbose)
ServerInstance->SNO->WriteGlobalSno('a', "Forbidden connection from %s (SQL query returned no matches)", user->GetFullRealHost().c_str());
pendingExt.set(user, AUTH_STATE_FAIL);
}
}
void OnError(SQL::Error& error) CXX11_OVERRIDE
{
User* user = ServerInstance->FindNick(uid);
if (!user)
return;
pendingExt.set(user, AUTH_STATE_FAIL);
if (verbose)
ServerInstance->SNO->WriteGlobalSno('a', "Forbidden connection from %s (SQL query failed: %s)", user->GetFullRealHost().c_str(), error.ToString());
}
};
class ModuleSQLAuth : public Module
{
LocalIntExt pendingExt;
dynamic_reference<SQL::Provider> SQL;
UserCertificateAPI sslapi;
std::string freeformquery;
std::string killreason;
std::string allowpattern;
bool verbose;
std::vector<std::string> hash_algos;
std::string kdf;
std::string pwcolumn;
public:
ModuleSQLAuth()
: pendingExt("sqlauth-wait", ExtensionItem::EXT_USER, this)
, SQL(this, "SQL")
, sslapi(this)
{
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
ConfigTag* conf = ServerInstance->Config->ConfValue("sqlauth");
std::string dbid = conf->getString("dbid");
if (dbid.empty())
SQL.SetProvider("SQL");
else
SQL.SetProvider("SQL/" + dbid);
freeformquery = conf->getString("query");
killreason = conf->getString("killreason");
allowpattern = conf->getString("allowpattern");
verbose = conf->getBool("verbose");
kdf = conf->getString("kdf");
pwcolumn = conf->getString("column");
hash_algos.clear();
irc::commasepstream algos(conf->getString("hash", "md5,sha256"));
std::string algo;
while (algos.GetToken(algo))
hash_algos.push_back(algo);
}
ModResult OnUserRegister(LocalUser* user) CXX11_OVERRIDE
{
// Note this is their initial (unresolved) connect block
ConfigTag* tag = user->MyClass->config;
if (!tag->getBool("usesqlauth", true))
return MOD_RES_PASSTHRU;
if (!allowpattern.empty() && InspIRCd::Match(user->nick,allowpattern))
return MOD_RES_PASSTHRU;
if (pendingExt.get(user))
return MOD_RES_PASSTHRU;
if (!SQL)
{
ServerInstance->SNO->WriteGlobalSno('a', "Forbiding connection from %s (SQL database not present)", user->GetFullRealHost().c_str());
ServerInstance->Users->QuitUser(user, killreason);
return MOD_RES_PASSTHRU;
}
pendingExt.set(user, AUTH_STATE_BUSY);
SQL::ParamMap userinfo;
SQL::PopulateUserInfo(user, userinfo);
userinfo["pass"] = user->password;
userinfo["certfp"] = sslapi ? sslapi->GetFingerprint(user) : "";
for (std::vector<std::string>::const_iterator it = hash_algos.begin(); it != hash_algos.end(); ++it)
{
HashProvider* hashprov = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + *it);
if (hashprov && !hashprov->IsKDF())
userinfo[*it + "pass"] = hashprov->Generate(user->password);
}
SQL->Submit(new AuthQuery(this, user->uuid, pendingExt, verbose, kdf, pwcolumn), freeformquery, userinfo);
return MOD_RES_PASSTHRU;
}
ModResult OnCheckReady(LocalUser* user) CXX11_OVERRIDE
{
switch (pendingExt.get(user))
{
case AUTH_STATE_NONE:
return MOD_RES_PASSTHRU;
case AUTH_STATE_BUSY:
return MOD_RES_DENY;
case AUTH_STATE_FAIL:
ServerInstance->Users->QuitUser(user, killreason);
return MOD_RES_DENY;
}
return MOD_RES_PASSTHRU;
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Allow/Deny connections based upon an arbitrary SQL table", VF_VENDOR);
}
};
MODULE_INIT(ModuleSQLAuth)
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