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://www.inspircd.org/wiki/index.php/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         Module* Sender;
  27         hashymodules &hashers;
  28         std::deque<std::string> &names;
  29  public:
  30         CommandMkpasswd (InspIRCd* Instance, Module* S, hashymodules &h, std::deque<std::string> &n)
  31                 : Command(Instance,"MKPASSWD", 0, 2), Sender(S), hashers(h), names(n)
  32         {
  33                 this->source = "m_password_hash.so";
  34                 syntax = "<hashtype> <any-text>";
  35         }
  36
  37         void MakeHash(User* user, const char* algo, const char* stuff)
  38         {
  39                 /* Lets see if they gave us an algorithm which has been implemented */
  40                 hashymodules::iterator x = hashers.find(algo);
  41                 if (x != hashers.end())
  42                 {
  43                         /* Yup, reset it first (Always ALWAYS do this) */
  44                         HashResetRequest(Sender, x->second).Send();
  45                         /* Now attempt to generate a hash */
  46                         user->WriteServ("NOTICE %s :%s hashed password for %s is %s",user->nick.c_str(), algo, stuff, HashSumRequest(Sender, x->second, stuff).Send() );
  47                 }
  48                 else if (names.empty())
  49                 {
  50                         /* same idea as bug #569 */
  51                         user->WriteServ("NOTICE %s :No hash provider modules are loaded", user->nick.c_str());
  52                 }
  53                 else
  54                 {
  55                         /* I dont do flying, bob. */
  56                         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() );
  57                 }
  58         }
  59
  60         CmdResult Handle (const std::vector<std::string>& parameters, User *user)
  61         {
  62                 MakeHash(user, parameters[0].c_str(), parameters[1].c_str());
  63                 // this hashing could take some time, increasing server load.
  64                 // Slow down the user if they are trying to flood mkpasswd requests
  65                 user->IncreasePenalty(5);
  66
  67                 return CMD_LOCALONLY;
  68         }
  69 };
  70
  71 class ModuleOperHash : public Module
  72 {
  73
  74         CommandMkpasswd* mycommand;
  75         hashymodules hashers; /* List of modules which implement HashRequest */
  76         std::deque<std::string> names; /* Module names which implement HashRequest */
  77
  78         bool diduseiface; /* If we've called UseInterface yet. */
  79  public:
  80
  81         ModuleOperHash(InspIRCd* Me)
  82                 : Module(Me)
  83         {
  84                 diduseiface = false;
  85
  86                 /* Read the config file first */
  87 //              Conf = NULL;
  88                 OnRehash(NULL,"");
  89
  90                 /* Find all modules which implement the interface 'HashRequest' */
  91                 modulelist* ml = ServerInstance->Modules->FindInterface("HashRequest");
  92
  93                 /* Did we find any modules? */
  94                 if (ml)
  95                 {
  96                         /* Yes, enumerate them all to find out the hashing algorithm name */
  97                         for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
  98                         {
  99                                 /* Make a request to it for its name, its implementing
 100                                  * HashRequest so we know its safe to do this
 101                                  */
 102                                 std::string name = HashNameRequest(this, *m).Send();
 103                                 /* Build a map of them */
 104                                 hashers[name.c_str()] = *m;
 105                                 names.push_back(name);
 106                         }
 107                         /* 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. */
 108                         ServerInstance->Modules->UseInterface("HashRequest");
 109                         diduseiface = true;
 110                 }
 111
 112                 mycommand = new CommandMkpasswd(ServerInstance, this, hashers, names);
 113                 ServerInstance->AddCommand(mycommand);
 114                 Implementation eventlist[] = { I_OnPassCompare, I_OnLoadModule };
 115                 ServerInstance->Modules->Attach(eventlist, this, 2);
 116         }
 117
 118         virtual ~ModuleOperHash()
 119         {
 120                 if (diduseiface) ServerInstance->Modules->DoneWithInterface("HashRequest");
 121         }
 122
 123
 124         virtual void OnLoadModule(Module* mod, const std::string& name)
 125         {
 126                 if (ServerInstance->Modules->ModuleHasInterface(mod, "HashRequest"))
 127                 {
 128                         ServerInstance->Logs->Log("m_password-hash",DEBUG, "Post-load registering hasher: %s", name.c_str());
 129                         std::string sname = HashNameRequest(this, mod).Send();
 130                         hashers[sname.c_str()] = mod;
 131                         names.push_back(sname);
 132                         if (!diduseiface)
 133                         {
 134                                 ServerInstance->Modules->UseInterface("HashRequest");
 135                                 diduseiface = true;
 136                         }
 137                 }
 138         }
 139
 140         virtual int OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype)
 141         {
 142                 /* First, lets see what hash theyre using on this oper */
 143                 hashymodules::iterator x = hashers.find(hashtype.c_str());
 144
 145                 /* Is this a valid hash name? (case insensitive) */
 146                 if (x != hashers.end())
 147                 {
 148                         /* Reset the hashing module */
 149                         HashResetRequest(this, x->second).Send();
 150                         /* Compare the hash in the config to the generated hash */
 151                         if (!strcasecmp(data.c_str(), HashSumRequest(this, x->second, input.c_str()).Send()))
 152                                 return 1;
 153                         /* No match, and must be hashed, forbid */
 154                         else return -1;
 155                 }
 156
 157                 /* Not a hash, fall through to strcmp in core */
 158                 return 0;
 159         }
 160
 161         virtual Version GetVersion()
 162         {
 163                 return Version("$Id$",VF_VENDOR,API_VERSION);
 164         }
 165 };
 166
 167 MODULE_INIT(ModuleOperHash)