src/modules/m_password_hash.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2010 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $ModDesc: Allows for hashed oper passwords */
  15
  16 #include "inspircd.h"
  17 #include "hash.h"
  18
  19 /* Handle /MKPASSWD
  20  */
  21 class CommandMkpasswd : public Command
  22 {
  23  public:
  24         CommandMkpasswd(Module* Creator) : Command(Creator, "MKPASSWD", 2)
  25         {
  26                 syntax = "<hashtype> <any-text>";
  27                 Penalty = 5;
  28         }
  29
  30         void MakeHash(User* user, const std::string& algo, const std::string& stuff)
  31         {
  32                 if (algo.substr(0,5) == "hmac-")
  33                 {
  34                         std::string type = algo.substr(5);
  35                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  36                         if (!hp)
  37                         {
  38                                 user->WriteServ("NOTICE %s :Unknown hash type", user->nick.c_str());
  39                                 return;
  40                         }
  41                         std::string salt = ServerInstance->GenRandomStr(6, false);
  42                         std::string target = hp->hmac(salt, stuff);
  43                         std::string str = BinToBase64(salt) + "$" + BinToBase64(target, NULL, 0);
  44
  45                         user->WriteServ("NOTICE %s :%s hashed password for %s is %s",
  46                                 user->nick.c_str(), algo.c_str(), stuff.c_str(), str.c_str());
  47                         return;
  48                 }
  49                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + algo);
  50                 if (hp)
  51                 {
  52                         /* Now attempt to generate a hash */
  53                         user->WriteServ("NOTICE %s :%s hashed password for %s is %s",
  54                                 user->nick.c_str(), algo.c_str(), stuff.c_str(), hp->hexsum(stuff).c_str());
  55                 }
  56                 else
  57                 {
  58                         user->WriteServ("NOTICE %s :Unknown hash type", user->nick.c_str());
  59                 }
  60         }
  61
  62         CmdResult Handle (const std::vector<std::string>& parameters, User *user)
  63         {
  64                 MakeHash(user, parameters[0], parameters[1]);
  65
  66                 return CMD_SUCCESS;
  67         }
  68 };
  69
  70 class ModuleOperHash : public Module
  71 {
  72         CommandMkpasswd cmd;
  73  public:
  74
  75         ModuleOperHash() : cmd(this)
  76         {
  77                 /* Read the config file first */
  78                 OnRehash(NULL);
  79
  80                 ServerInstance->AddCommand(&cmd);
  81                 Implementation eventlist[] = { I_OnPassCompare };
  82                 ServerInstance->Modules->Attach(eventlist, this, 1);
  83         }
  84
  85         virtual ModResult OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype)
  86         {
  87                 if (hashtype.substr(0,5) == "hmac-")
  88                 {
  89                         std::string type = hashtype.substr(5);
  90                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  91                         if (!hp)
  92                                 return MOD_RES_PASSTHRU;
  93                         // this is a valid hash, from here on we either accept or deny
  94                         std::string::size_type sep = data.find('$');
  95                         if (sep == std::string::npos)
  96                                 return MOD_RES_DENY;
  97                         std::string salt = Base64ToBin(data.substr(0, sep));
  98                         std::string target = Base64ToBin(data.substr(sep + 1));
  99
 100                         if (target == hp->hmac(salt, input))
 101                                 return MOD_RES_ALLOW;
 102                         else
 103                                 return MOD_RES_DENY;
 104                 }
 105
 106                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + hashtype);
 107
 108                 /* Is this a valid hash name? */
 109                 if (hp)
 110                 {
 111                         /* Compare the hash in the config to the generated hash */
 112                         if (data == hp->hexsum(input))
 113                                 return MOD_RES_ALLOW;
 114                         else
 115                                 /* No match, and must be hashed, forbid */
 116                                 return MOD_RES_DENY;
 117                 }
 118
 119                 /* Not a hash, fall through to strcmp in core */
 120                 return MOD_RES_PASSTHRU;
 121         }
 122
 123         virtual Version GetVersion()
 124         {
 125                 return Version("Allows for hashed oper passwords",VF_VENDOR);
 126         }
 127 };
 128
 129 MODULE_INIT(ModuleOperHash)