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, 5);
  40                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  41                         if (!hp)
  42                         {
  43                                 user->WriteNotice("Unknown hash type");
  44                                 return;
  45                         }
  46
  47                         if (hp->IsKDF())
  48                         {
  49                                 user->WriteNotice(type + " does not support HMAC");
  50                                 return;
  51                         }
  52
  53                         std::string salt = ServerInstance->GenRandomStr(hp->out_size, false);
  54                         std::string target = hp->hmac(salt, stuff);
  55                         std::string str = BinToBase64(salt) + "$" + BinToBase64(target, NULL, 0);
  56
  57                         user->WriteNotice(algo + " hashed password for " + stuff + " is " + str);
  58                         return;
  59                 }
  60                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + algo);
  61                 if (hp)
  62                 {
  63                         /* Now attempt to generate a hash */
  64                         std::string hexsum = hp->Generate(stuff);
  65                         user->WriteNotice(algo + " hashed password for " + stuff + " is " + hexsum);
  66                 }
  67                 else
  68                 {
  69                         user->WriteNotice("Unknown hash type");
  70                 }
  71         }
  72
  73         CmdResult Handle (const std::vector<std::string>& parameters, User *user)
  74         {
  75                 MakeHash(user, parameters[0], parameters[1]);
  76
  77                 return CMD_SUCCESS;
  78         }
  79 };
  80
  81 class ModuleOperHash : public Module
  82 {
  83         CommandMkpasswd cmd;
  84  public:
  85
  86         ModuleOperHash() : cmd(this)
  87         {
  88         }
  89
  90         ModResult OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype) CXX11_OVERRIDE
  91         {
  92                 if (!hashtype.compare(0, 5, "hmac-", 5))
  93                 {
  94                         std::string type(hashtype, 5);
  95                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  96                         if (!hp)
  97                                 return MOD_RES_PASSTHRU;
  98
  99                         if (hp->IsKDF())
 100                         {
 101                                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Tried to use HMAC with %s, which does not support HMAC", type.c_str());
 102                                 return MOD_RES_DENY;
 103                         }
 104
 105                         // this is a valid hash, from here on we either accept or deny
 106                         std::string::size_type sep = data.find('$');
 107                         if (sep == std::string::npos)
 108                                 return MOD_RES_DENY;
 109                         std::string salt = Base64ToBin(data.substr(0, sep));
 110                         std::string target = Base64ToBin(data.substr(sep + 1));
 111
 112                         if (target == hp->hmac(salt, input))
 113                                 return MOD_RES_ALLOW;
 114                         else
 115                                 return MOD_RES_DENY;
 116                 }
 117
 118                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + hashtype);
 119
 120                 /* Is this a valid hash name? */
 121                 if (hp)
 122                 {
 123                         if (hp->Compare(input, data))
 124                                 return MOD_RES_ALLOW;
 125                         else
 126                                 /* No match, and must be hashed, forbid */
 127                                 return MOD_RES_DENY;
 128                 }
 129
 130                 // We don't handle this type, let other mods or the core decide
 131                 return MOD_RES_PASSTHRU;
 132         }
 133
 134         Version GetVersion() CXX11_OVERRIDE
 135         {
 136                 return Version("Allows for hashed oper passwords",VF_VENDOR);
 137         }
 138 };
 139
 140 MODULE_INIT(ModuleOperHash)