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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2017-2020 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2014, 2018 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2013-2014 Adam <Adam@anope.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/ldap.h"
namespace
{
Module* me;
}
class LDAPOperBase : public LDAPInterface
{
protected:
const std::string uid;
const std::string opername;
const std::string password;
void Fallback(User* user)
{
if (!user)
return;
Command* oper_command = ServerInstance->Parser.GetHandler("OPER");
if (!oper_command)
return;
CommandBase::Params params;
params.push_back(opername);
params.push_back(password);
ClientProtocol::TagMap tags;
oper_command->Handle(user, CommandBase::Params(params, tags));
}
void Fallback()
{
User* user = ServerInstance->FindUUID(uid);
Fallback(user);
}
public:
LDAPOperBase(Module* mod, const std::string& uuid, const std::string& oper, const std::string& pass)
: LDAPInterface(mod)
, uid(uuid), opername(oper), password(pass)
{
}
void OnError(const LDAPResult& err) CXX11_OVERRIDE
{
ServerInstance->SNO->WriteToSnoMask('a', "Error searching LDAP server: %s", err.getError().c_str());
Fallback();
delete this;
}
};
class BindInterface : public LDAPOperBase
{
public:
BindInterface(Module* mod, const std::string& uuid, const std::string& oper, const std::string& pass)
: LDAPOperBase(mod, uuid, oper, pass)
{
}
void OnResult(const LDAPResult& r) CXX11_OVERRIDE
{
User* user = ServerInstance->FindUUID(uid);
ServerConfig::OperIndex::const_iterator iter = ServerInstance->Config->oper_blocks.find(opername);
if (!user || iter == ServerInstance->Config->oper_blocks.end())
{
Fallback();
delete this;
return;
}
OperInfo* ifo = iter->second;
user->Oper(ifo);
delete this;
}
};
class SearchInterface : public LDAPOperBase
{
const std::string provider;
bool HandleResult(const LDAPResult& result)
{
dynamic_reference<LDAPProvider> LDAP(me, provider);
if (!LDAP || result.empty())
return false;
try
{
const LDAPAttributes& attr = result.get(0);
std::string bindDn = attr.get("dn");
if (bindDn.empty())
return false;
LDAP->Bind(new BindInterface(this->creator, uid, opername, password), bindDn, password);
}
catch (LDAPException& ex)
{
ServerInstance->SNO->WriteToSnoMask('a', "Error searching LDAP server: " + ex.GetReason());
}
return true;
}
public:
SearchInterface(Module* mod, const std::string& prov, const std::string &uuid, const std::string& oper, const std::string& pass)
: LDAPOperBase(mod, uuid, oper, pass)
, provider(prov)
{
}
void OnResult(const LDAPResult& result) CXX11_OVERRIDE
{
if (!HandleResult(result))
Fallback();
delete this;
}
};
class AdminBindInterface : public LDAPInterface
{
const std::string provider;
const std::string user;
const std::string opername;
const std::string password;
const std::string base;
const std::string what;
public:
AdminBindInterface(Module* c, const std::string& p, const std::string& u, const std::string& o, const std::string& pa, const std::string& b, const std::string& w)
: LDAPInterface(c)
, provider(p)
, user(u)
, opername(o)
, password(pa)
, base(b)
, what(w)
{
}
void OnResult(const LDAPResult& r) CXX11_OVERRIDE
{
dynamic_reference<LDAPProvider> LDAP(me, provider);
if (LDAP)
{
try
{
LDAP->Search(new SearchInterface(this->creator, provider, user, opername, password), base, what);
}
catch (LDAPException& ex)
{
ServerInstance->SNO->WriteToSnoMask('a', "Error searching LDAP server: " + ex.GetReason());
}
}
delete this;
}
void OnError(const LDAPResult& err) CXX11_OVERRIDE
{
ServerInstance->SNO->WriteToSnoMask('a', "Error binding as manager to LDAP server: " + err.getError());
delete this;
}
};
class ModuleLDAPOper : public Module
{
dynamic_reference<LDAPProvider> LDAP;
std::string base;
std::string attribute;
public:
ModuleLDAPOper()
: LDAP(this, "LDAP")
{
me = this;
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
ConfigTag* tag = ServerInstance->Config->ConfValue("ldapoper");
LDAP.SetProvider("LDAP/" + tag->getString("dbid"));
base = tag->getString("baserdn");
attribute = tag->getString("attribute");
}
ModResult OnPreCommand(std::string& command, CommandBase::Params& parameters, LocalUser* user, bool validated) CXX11_OVERRIDE
{
if (validated && command == "OPER" && parameters.size() >= 2)
{
const std::string& opername = parameters[0];
const std::string& password = parameters[1];
ServerConfig::OperIndex::const_iterator it = ServerInstance->Config->oper_blocks.find(opername);
if (it == ServerInstance->Config->oper_blocks.end())
return MOD_RES_PASSTHRU;
ConfigTag* tag = it->second->oper_block;
if (!tag)
return MOD_RES_PASSTHRU;
std::string acceptedhosts = tag->getString("host");
std::string hostname = user->ident + "@" + user->GetRealHost();
if (!InspIRCd::MatchMask(acceptedhosts, hostname, user->GetIPString()))
return MOD_RES_PASSTHRU;
if (!LDAP)
return MOD_RES_PASSTHRU;
try
{
std::string what = attribute + "=" + opername;
LDAP->BindAsManager(new AdminBindInterface(this, LDAP.GetProvider(), user->uuid, opername, password, base, what));
return MOD_RES_DENY;
}
catch (LDAPException& ex)
{
ServerInstance->SNO->WriteToSnoMask('a', "LDAP exception: " + ex.GetReason());
}
}
return MOD_RES_PASSTHRU;
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Allows server operators to be authenticated against an LDAP database.", VF_VENDOR);
}
};
MODULE_INIT(ModuleLDAPOper)
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