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                 }
  48                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + algo);
  49                 if (hp)
  50                 {
  51                         /* Now attempt to generate a hash */
  52                         user->WriteServ("NOTICE %s :%s hashed password for %s is %s",
  53                                 user->nick.c_str(), algo.c_str(), stuff.c_str(), hp->hexsum(stuff).c_str());
  54                 }
  55                 else
  56                 {
  57                         user->WriteServ("NOTICE %s :Unknown hash type", user->nick.c_str());
  58                 }
  59         }
  60
  61         CmdResult Handle (const std::vector<std::string>& parameters, User *user)
  62         {
  63                 MakeHash(user, parameters[0], parameters[1]);
  64
  65                 return CMD_SUCCESS;
  66         }
  67 };
  68
  69 class ModuleOperHash : public Module
  70 {
  71         CommandMkpasswd cmd;
  72  public:
  73
  74         ModuleOperHash() : cmd(this)
  75         {
  76                 /* Read the config file first */
  77                 OnRehash(NULL);
  78
  79                 ServerInstance->AddCommand(&cmd);
  80                 Implementation eventlist[] = { I_OnPassCompare };
  81                 ServerInstance->Modules->Attach(eventlist, this, 1);
  82         }
  83
  84         virtual ModResult OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype)
  85         {
  86                 if (hashtype.substr(0,5) == "hmac-")
  87                 {
  88                         std::string type = hashtype.substr(5);
  89                         HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + type);
  90                         if (!hp)
  91                                 return MOD_RES_PASSTHRU;
  92                         // this is a valid hash, from here on we either accept or deny
  93                         std::string::size_type sep = data.find('$');
  94                         if (sep == std::string::npos)
  95                                 return MOD_RES_DENY;
  96                         std::string salt = Base64ToBin(data.substr(0, sep));
  97                         std::string target = Base64ToBin(data.substr(sep + 1));
  98
  99                         if (target == hp->hmac(salt, input))
 100                                 return MOD_RES_ALLOW;
 101                         else
 102                                 return MOD_RES_DENY;
 103                 }
 104
 105                 HashProvider* hp = ServerInstance->Modules->FindDataService<HashProvider>("hash/" + hashtype);
 106
 107                 /* Is this a valid hash name? */
 108                 if (hp)
 109                 {
 110                         /* Compare the hash in the config to the generated hash */
 111                         if (data == hp->hexsum(input))
 112                                 return MOD_RES_ALLOW;
 113                         else
 114                                 /* No match, and must be hashed, forbid */
 115                                 return MOD_RES_DENY;
 116                 }
 117
 118                 /* Not a hash, fall through to strcmp in core */
 119                 return MOD_RES_PASSTHRU;
 120         }
 121
 122         virtual Version GetVersion()
 123         {
 124                 return Version("Allows for hashed oper passwords",VF_VENDOR);
 125         }
 126 };
 127
 128 MODULE_INIT(ModuleOperHash)