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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2014 Daniel Vassdal <shutter@canternet.org>
* Copyright (C) 2013, 2017, 2019-2024 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2012, 2014 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2006 Craig Edwards <brain@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/hash.h"
class CommandMkpasswd final
: public Command
{
public:
CommandMkpasswd(Module* Creator)
: Command(Creator, "MKPASSWD", 2)
{
penalty = 5000;
syntax = { "<hashtype> <plaintext>" };
}
CmdResult Handle(User* user, const Params& parameters) override
{
if (!parameters[0].compare(0, 5, "hmac-", 5))
{
std::string type(parameters[0], 5);
HashProvider* hp = ServerInstance->Modules.FindDataService<HashProvider>("hash/" + type);
if (!hp)
{
user->WriteNotice("Unknown hash type");
return CmdResult::FAILURE;
}
if (hp->IsKDF())
{
user->WriteNotice(type + " does not support HMAC");
return CmdResult::FAILURE;
}
std::string salt(hp->out_size, '\0');
ServerInstance->GenRandom(salt.data(), salt.length());
std::string target = hp->hmac(salt, parameters[1]);
std::string str = Base64::Encode(salt) + "$" + Base64::Encode(target, nullptr, 0);
user->WriteNotice(parameters[0] + " hashed password for " + parameters[1] + " is " + str);
return CmdResult::SUCCESS;
}
HashProvider* hp = ServerInstance->Modules.FindDataService<HashProvider>("hash/" + parameters[0]);
if (!hp)
{
user->WriteNotice("Unknown hash type");
return CmdResult::FAILURE;
}
try
{
std::string hexsum = hp->Generate(parameters[1]);
user->WriteNotice(parameters[0] + " hashed password for " + parameters[1] + " is " + hexsum);
return CmdResult::SUCCESS;
}
catch (const ModuleException& error)
{
user->WriteNotice("*** " + name + ": " + error.GetReason());
return CmdResult::FAILURE;
}
}
};
class ModulePasswordHash final
: public Module
{
private:
CommandMkpasswd cmd;
public:
ModulePasswordHash()
: Module(VF_VENDOR, "Allows passwords to be hashed and adds the /MKPASSWD command which allows the generation of hashed passwords for use in the server configuration.")
, cmd(this)
{
}
void ReadConfig(ConfigStatus& status) override
{
const auto& tag = ServerInstance->Config->ConfValue("mkpasswd");
cmd.access_needed = tag->getBool("operonly") ? CmdAccess::OPERATOR : CmdAccess::NORMAL;
}
ModResult OnCheckPassword(const std::string& password, const std::string& passwordhash, const std::string& value) override
{
if (!passwordhash.compare(0, 5, "hmac-", 5))
{
std::string type(passwordhash, 5);
HashProvider* hp = ServerInstance->Modules.FindDataService<HashProvider>("hash/" + type);
if (!hp)
return MOD_RES_PASSTHRU;
if (hp->IsKDF())
{
ServerInstance->Logs.Normal(MODNAME, "Tried to use HMAC with {}, which does not support HMAC", type);
return MOD_RES_DENY;
}
// this is a valid hash, from here on we either accept or deny
std::string::size_type sep = password.find('$');
if (sep == std::string::npos)
return MOD_RES_DENY;
std::string salt = Base64::Decode(password.substr(0, sep));
std::string target = Base64::Decode(password.substr(sep + 1));
if (target == hp->hmac(salt, value))
return MOD_RES_ALLOW;
else
return MOD_RES_DENY;
}
HashProvider* hp = ServerInstance->Modules.FindDataService<HashProvider>("hash/" + passwordhash);
/* Is this a valid hash name? */
if (hp)
{
if (hp->Compare(value, password))
return MOD_RES_ALLOW;
else
/* No match, and must be hashed, forbid */
return MOD_RES_DENY;
}
// We don't handle this type, let other mods or the core decide
return MOD_RES_PASSTHRU;
}
};
MODULE_INIT(ModulePasswordHash)
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