src/modules/m_password_hash.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 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 /* $ModDep: m_hash.h */
  16
  17 #include "inspircd.h"
  18 #include "m_hash.h"
  19
  20 typedef std::map<irc::string, Module*> hashymodules;
  21
  22 /* Handle /MKPASSWD
  23  */
  24 class CommandMkpasswd : public Command
  25 {
  26         hashymodules &hashers;
  27         std::deque<std::string> &names;
  28  public:
  29         CommandMkpasswd(Module* Creator, hashymodules &h, std::deque<std::string> &n) : Command(Creator, "MKPASSWD", 2), hashers(h), names(n)
  30         {
  31                 syntax = "<hashtype> <any-text>";
  32         }
  33
  34         void MakeHash(User* user, const char* algo, const char* stuff)
  35         {
  36                 /* Lets see if they gave us an algorithm which has been implemented */
  37                 hashymodules::iterator x = hashers.find(algo);
  38                 if (x != hashers.end())
  39                 {
  40                         /* Yup, reset it first (Always ALWAYS do this) */
  41                         HashResetRequest(creator, x->second).Send();
  42                         /* Now attempt to generate a hash */
  43                         user->WriteServ("NOTICE %s :%s hashed password for %s is %s",user->nick.c_str(), algo, stuff, HashSumRequest(creator, x->second, stuff).Send() );
  44                 }
  45                 else if (names.empty())
  46                 {
  47                         /* same idea as bug #569 */
  48                         user->WriteServ("NOTICE %s :No hash provider modules are loaded", user->nick.c_str());
  49                 }
  50                 else
  51                 {
  52                         /* I dont do flying, bob. */
  53                         user->WriteServ("NOTICE %s :Unknown hash type, valid hash types are: %s", user->nick.c_str(), irc::stringjoiner(", ", names, 0, names.size() - 1).GetJoined().c_str() );
  54                 }
  55         }
  56
  57         CmdResult Handle (const std::vector<std::string>& parameters, User *user)
  58         {
  59                 MakeHash(user, parameters[0].c_str(), parameters[1].c_str());
  60                 // this hashing could take some time, increasing server load.
  61                 // Slow down the user if they are trying to flood mkpasswd requests
  62                 user->IncreasePenalty(5);
  63
  64                 return CMD_SUCCESS;
  65         }
  66 };
  67
  68 class ModuleOperHash : public Module
  69 {
  70
  71         CommandMkpasswd cmd;
  72         hashymodules hashers; /* List of modules which implement HashRequest */
  73         std::deque<std::string> names; /* Module names which implement HashRequest */
  74
  75         bool diduseiface; /* If we've called UseInterface yet. */
  76  public:
  77
  78         ModuleOperHash()
  79                 : cmd(this, hashers, names)
  80         {
  81                 diduseiface = false;
  82
  83                 /* Read the config file first */
  84 //              Conf = NULL;
  85                 OnRehash(NULL);
  86
  87                 /* Find all modules which implement the interface 'HashRequest' */
  88                 modulelist* ml = ServerInstance->Modules->FindInterface("HashRequest");
  89
  90                 /* Did we find any modules? */
  91                 if (ml)
  92                 {
  93                         /* Yes, enumerate them all to find out the hashing algorithm name */
  94                         for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
  95                         {
  96                                 /* Make a request to it for its name, its implementing
  97                                  * HashRequest so we know its safe to do this
  98                                  */
  99                                 std::string name = HashNameRequest(this, *m).Send();
 100                                 /* Build a map of them */
 101                                 hashers[name.c_str()] = *m;
 102                                 names.push_back(name);
 103                         }
 104                         /* UseInterface doesn't do anything if there are no providers, so we'll have to call it later if a module gets loaded later on. */
 105                         ServerInstance->Modules->UseInterface("HashRequest");
 106                         diduseiface = true;
 107                 }
 108
 109                 ServerInstance->AddCommand(&cmd);
 110                 Implementation eventlist[] = { I_OnPassCompare, I_OnLoadModule };
 111                 ServerInstance->Modules->Attach(eventlist, this, 2);
 112         }
 113
 114         virtual ~ModuleOperHash()
 115         {
 116                 if (diduseiface) ServerInstance->Modules->DoneWithInterface("HashRequest");
 117         }
 118
 119
 120         virtual void OnLoadModule(Module* mod, const std::string& name)
 121         {
 122                 if (ServerInstance->Modules->ModuleHasInterface(mod, "HashRequest"))
 123                 {
 124                         ServerInstance->Logs->Log("m_password-hash",DEBUG, "Post-load registering hasher: %s", name.c_str());
 125                         std::string sname = HashNameRequest(this, mod).Send();
 126                         hashers[sname.c_str()] = mod;
 127                         names.push_back(sname);
 128                         if (!diduseiface)
 129                         {
 130                                 ServerInstance->Modules->UseInterface("HashRequest");
 131                                 diduseiface = true;
 132                         }
 133                 }
 134         }
 135
 136         virtual ModResult OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype)
 137         {
 138                 /* First, lets see what hash theyre using on this oper */
 139                 hashymodules::iterator x = hashers.find(hashtype.c_str());
 140
 141                 /* Is this a valid hash name? (case insensitive) */
 142                 if (x != hashers.end())
 143                 {
 144                         /* Reset the hashing module */
 145                         HashResetRequest(this, x->second).Send();
 146                         /* Compare the hash in the config to the generated hash */
 147                         if (!strcasecmp(data.c_str(), HashSumRequest(this, x->second, input.c_str()).Send()))
 148                                 return MOD_RES_ALLOW;
 149                         /* No match, and must be hashed, forbid */
 150                         else
 151                                 return MOD_RES_DENY;
 152                 }
 153
 154                 /* Not a hash, fall through to strcmp in core */
 155                 return MOD_RES_PASSTHRU;
 156         }
 157
 158         virtual Version GetVersion()
 159         {
 160                 return Version("Allows for hashed oper passwords",VF_VENDOR,API_VERSION);
 161         }
 162 };
 163
 164 MODULE_INIT(ModuleOperHash)