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         CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE
  36         {
  37                 if (!parameters[0].compare(0, 5, "hmac-", 5))
  38                 {
  39                         std::string type(parameters[0], 5);
  40                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  41                         if (!hp)
  42                         {
  43                                 user->WriteNotice("Unknown hash type");
  44                                 return CMD_FAILURE;
  45                         }
  46
  47                         if (hp->IsKDF())
  48                         {
  49                                 user->WriteNotice(type + " does not support HMAC");
  50                                 return CMD_FAILURE;
  51                         }
  52
  53                         std::string salt = ServerInstance->GenRandomStr(hp->out_size, false);
  54                         std::string target = hp->hmac(salt, parameters[1]);
  55                         std::string str = BinToBase64(salt) + "$" + BinToBase64(target, NULL, 0);
  56
  57                         user->WriteNotice(parameters[0] + " hashed password for " + parameters[1] + " is " + str);
  58                         return CMD_SUCCESS;
  59                 }
  60
  61                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + parameters[0]);
  62                 if (!hp)
  63                 {
  64                         user->WriteNotice("Unknown hash type");
  65                         return CMD_FAILURE;
  66                 }
  67
  68                 std::string hexsum = hp->Generate(parameters[1]);
  69                 user->WriteNotice(parameters[0] + " hashed password for " + parameters[1] + " is " + hexsum);
  70                 return CMD_SUCCESS;
  71         }
  72 };
  73
  74 class ModulePasswordHash : public Module
  75 {
  76  private:
  77         CommandMkpasswd cmd;
  78
  79  public:
  80         ModulePasswordHash()
  81                 : cmd(this)
  82         {
  83         }
  84
  85         ModResult OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype) CXX11_OVERRIDE
  86         {
  87                 if (!hashtype.compare(0, 5, "hmac-", 5))
  88                 {
  89                         std::string type(hashtype, 5);
  90                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  91                         if (!hp)
  92                                 return MOD_RES_PASSTHRU;
  93
  94                         if (hp->IsKDF())
  95                         {
  96                                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Tried to use HMAC with %s, which does not support HMAC", type.c_str());
  97                                 return MOD_RES_DENY;
  98                         }
  99
 100                         // this is a valid hash, from here on we either accept or deny
 101                         std::string::size_type sep = data.find('$');
 102                         if (sep == std::string::npos)
 103                                 return MOD_RES_DENY;
 104                         std::string salt = Base64ToBin(data.substr(0, sep));
 105                         std::string target = Base64ToBin(data.substr(sep + 1));
 106
 107                         if (target == hp->hmac(salt, input))
 108                                 return MOD_RES_ALLOW;
 109                         else
 110                                 return MOD_RES_DENY;
 111                 }
 112
 113                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + hashtype);
 114
 115                 /* Is this a valid hash name? */
 116                 if (hp)
 117                 {
 118                         if (hp->Compare(input, data))
 119                                 return MOD_RES_ALLOW;
 120                         else
 121                                 /* No match, and must be hashed, forbid */
 122                                 return MOD_RES_DENY;
 123                 }
 124
 125                 // We don't handle this type, let other mods or the core decide
 126                 return MOD_RES_PASSTHRU;
 127         }
 128
 129         Version GetVersion() CXX11_OVERRIDE
 130         {
 131                 return Version("Provides the ability to hash passwords to other modules", VF_VENDOR);
 132         }
 133 };
 134
 135 MODULE_INIT(ModulePasswordHash)