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m_password_hash.cpp

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/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
 * See: http://www.inspircd.org/wiki/index.php/Credits
 *
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

/* $ModDesc: Allows for hashed oper passwords */
/* $ModDep: m_hash.h */

#include "inspircd.h"
#include "m_hash.h"

typedef std::map<irc::string, Module*> hashymodules;

/* Handle /MKPASSWD
 */
class CommandMkpasswd : public Command
{
        Module* Sender;
        hashymodules &hashers;
        std::deque<std::string> &names;
 public:
        CommandMkpasswd (InspIRCd* Instance, Module* S, hashymodules &h, std::deque<std::string> &n)
                : Command(Instance,"MKPASSWD", "o", 2), Sender(S), hashers(h), names(n)
        {
                this->source = "m_password_hash.so";
                syntax = "<hashtype> <any-text>";
        }

        void MakeHash(User* user, const char* algo, const char* stuff)
        {
                /* Lets see if they gave us an algorithm which has been implemented */
                hashymodules::iterator x = hashers.find(algo);
                if (x != hashers.end())
                {
                        /* Yup, reset it first (Always ALWAYS do this) */
                        HashResetRequest(Sender, x->second).Send();
                        /* Now attempt to generate a hash */
                        user->WriteServ("NOTICE %s :%s hashed password for %s is %s",user->nick.c_str(), algo, stuff, HashSumRequest(Sender, x->second, stuff).Send() );
                }
                else if (names.empty())
                {
                        /* same idea as bug #569 */
                        user->WriteServ("NOTICE %s :No hash provider modules are loaded", user->nick.c_str());
                }
                else
                {
                        /* I dont do flying, bob. */
                        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() );
                }
        }

        CmdResult Handle (const std::vector<std::string>& parameters, User *user)
        {
                MakeHash(user, parameters[0].c_str(), parameters[1].c_str());
                /* NOTE: Don't propagate this across the network!
                 * We dont want plaintext passes going all over the place...
                 * To make sure it goes nowhere, return CMD_FAILURE!
                 */
                return CMD_FAILURE;
        }
};

class ModuleOperHash : public Module
{

        CommandMkpasswd* mycommand;
        hashymodules hashers; /* List of modules which implement HashRequest */
        std::deque<std::string> names; /* Module names which implement HashRequest */

        bool diduseiface; /* If we've called UseInterface yet. */
 public:

        ModuleOperHash(InspIRCd* Me)
                : Module(Me)
        {
                diduseiface = false;

                /* Read the config file first */
//              Conf = NULL;
                OnRehash(NULL,"");

                /* Find all modules which implement the interface 'HashRequest' */
                modulelist* ml = ServerInstance->Modules->FindInterface("HashRequest");

                /* Did we find any modules? */
                if (ml)
                {
                        /* Yes, enumerate them all to find out the hashing algorithm name */
                        for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
                        {
                                /* Make a request to it for its name, its implementing
                                 * HashRequest so we know its safe to do this
                                 */
                                std::string name = HashNameRequest(this, *m).Send();
                                /* Build a map of them */
                                hashers[name.c_str()] = *m;
                                names.push_back(name);
                        }
                        /* 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. */
                        ServerInstance->Modules->UseInterface("HashRequest");
                        diduseiface = true;
                }

                mycommand = new CommandMkpasswd(ServerInstance, this, hashers, names);
                ServerInstance->AddCommand(mycommand);
                Implementation eventlist[] = { I_OnPassCompare, I_OnLoadModule };
                ServerInstance->Modules->Attach(eventlist, this, 2);
        }

        virtual ~ModuleOperHash()
        {
                if (diduseiface) ServerInstance->Modules->DoneWithInterface("HashRequest");
        }


        virtual void OnLoadModule(Module* mod, const std::string& name)
        {
                if (ServerInstance->Modules->ModuleHasInterface(mod, "HashRequest"))
                {
                        ServerInstance->Logs->Log("m_password-hash",DEBUG, "Post-load registering hasher: %s", name.c_str());
                        std::string sname = HashNameRequest(this, mod).Send();
                        hashers[sname.c_str()] = mod;
                        names.push_back(sname);
                        if (!diduseiface)
                        {
                                ServerInstance->Modules->UseInterface("HashRequest");
                                diduseiface = true;
                        }
                }
        }

        virtual int OnPassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype)
        {
                /* First, lets see what hash theyre using on this oper */
                hashymodules::iterator x = hashers.find(hashtype.c_str());

                /* Is this a valid hash name? (case insensitive) */
                if (x != hashers.end())
                {
                        /* Reset the hashing module */
                        HashResetRequest(this, x->second).Send();
                        /* Compare the hash in the config to the generated hash */
                        if (!strcasecmp(data.c_str(), HashSumRequest(this, x->second, input.c_str()).Send()))
                                return 1;
                        /* No match, and must be hashed, forbid */
                        else return -1;
                }

                /* Not a hash, fall through to strcmp in core */
                return 0;
        }

        virtual Version GetVersion()
        {
                return Version("$Id: m_password_hash.cpp 10291 2008-08-25 20:35:51Z w00t $",VF_VENDOR,API_VERSION);
        }
};

MODULE_INIT(ModuleOperHash)