src/modules/m_password_hash.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   6  *
   7  * This file is part of InspIRCd.  InspIRCd is free software: you can
   8  * redistribute it and/or modify it under the terms of the GNU General Public
   9  * License as published by the Free Software Foundation, version 2.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  14  * details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20
  21 #include "inspircd.h"
  22 #include "modules/hash.h"
  23
  24 /* Handle /MKPASSWD
  25  */
  26 class CommandMkpasswd : public Command
  27 {
  28  public:
  29         CommandMkpasswd(Module* Creator) : Command(Creator, "MKPASSWD", 2)
  30         {
  31                 syntax = "<hashtype> <any-text>";
  32                 Penalty = 5;
  33         }
  34
  35         void MakeHash(User* user, const std::string& algo, const std::string& stuff)
  36         {
  37                 if (!algo.compare(0, 5, "hmac-", 5))
  38                 {
  39                         std::string type = algo.substr(5);
  40                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  41                         if (!hp)
  42                         {
  43                                 user->WriteNotice("Unknown hash type");
  44                                 return;
  45                         }
  46                         std::string salt = ServerInstance->GenRandomStr(hp->out_size, false);
  47                         std::string target = hp->hmac(salt, stuff);
  48                         std::string str = BinToBase64(salt) + "$" + BinToBase64(target, NULL, 0);
  49
  50                         user->WriteNotice(algo + " hashed password for " + stuff + " is " + str);
  51                         return;
  52                 }
  53                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + algo);
  54                 if (hp)
  55                 {
  56                         /* Now attempt to generate a hash */
  57                         std::string hexsum = hp->hexsum(stuff);
  58                         user->WriteNotice(algo + " hashed password for " + stuff + " is " + hexsum);
  59                 }
  60                 else
  61                 {
  62                         user->WriteNotice("Unknown hash type");
  63                 }
  64         }
  65
  66         CmdResult Handle (const std::vector<std::string>& parameters, User *user)
  67         {
  68                 MakeHash(user, parameters[0], parameters[1]);
  69
  70                 return CMD_SUCCESS;
  71         }
  72 };
  73
  74 class ModuleOperHash : public Module
  75 {
  76         CommandMkpasswd cmd;
  77  public:
  78
  79         ModuleOperHash() : cmd(this)
  80         {
  81         }
  82
  83         ModResult OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype) CXX11_OVERRIDE
  84         {
  85                 if (!hashtype.compare(0, 5, "hmac-", 5))
  86                 {
  87                         std::string type = hashtype.substr(5);
  88                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  89                         if (!hp)
  90                                 return MOD_RES_PASSTHRU;
  91                         // this is a valid hash, from here on we either accept or deny
  92                         std::string::size_type sep = data.find('$');
  93                         if (sep == std::string::npos)
  94                                 return MOD_RES_DENY;
  95                         std::string salt = Base64ToBin(data.substr(0, sep));
  96                         std::string target = Base64ToBin(data.substr(sep + 1));
  97
  98                         if (target == hp->hmac(salt, input))
  99                                 return MOD_RES_ALLOW;
 100                         else
 101                                 return MOD_RES_DENY;
 102                 }
 103
 104                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + hashtype);
 105
 106                 /* Is this a valid hash name? */
 107                 if (hp)
 108                 {
 109                         // Use the timing-safe compare function to compare the hashes
 110                         if (InspIRCd::TimingSafeCompare(data, hp->hexsum(input)))
 111                                 return MOD_RES_ALLOW;
 112                         else
 113                                 /* No match, and must be hashed, forbid */
 114                                 return MOD_RES_DENY;
 115                 }
 116
 117                 // We don't handle this type, let other mods or the core decide
 118                 return MOD_RES_PASSTHRU;
 119         }
 120
 121         Version GetVersion() CXX11_OVERRIDE
 122         {
 123                 return Version("Allows for hashed oper passwords",VF_VENDOR);
 124         }
 125 };
 126
 127 MODULE_INIT(ModuleOperHash)