ns_resetpass.cpp

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/* NickServ core functions
 *
 * (C) 2003-2013 Anope Team
 * Contact us at team@anope.org
 *
 * Please read COPYING and README for further details.
 *
 * Based on the original code of Epona by Lara.
 * Based on the original code of Services by Andy Church.
 */

/*************************************************************************/

#include "module.h"

static bool SendResetEmail(User *u, const NickAlias *na, const BotInfo *bi);

class CommandNSResetPass : public Command
{
 public:
        CommandNSResetPass(Module *creator) : Command(creator, "nickserv/resetpass", 1, 1)
        {
                this->SetDesc(_("Helps you reset lost passwords"));
                this->SetSyntax(_("\037nickname\037"));
                this->AllowUnregistered(true);
        }

        void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
        {
                const NickAlias *na;

                if (Config->RestrictMail && !source.HasCommand("nickserv/resetpass"))
                        source.Reply(ACCESS_DENIED);
                else if (!(na = NickAlias::Find(params[0])))
                        source.Reply(NICK_X_NOT_REGISTERED, params[0].c_str());
                else
                {
                        if (SendResetEmail(source.GetUser(), na, source.service))
                        {
                                Log(LOG_COMMAND, source, this) << "for " << na->nick << " (group: " << na->nc->display << ")";
                                source.Reply(_("Password reset email for \002%s\002 has been sent."), na->nick.c_str());
                        }
                }

                return;
        }

        bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
        {
                this->SendSyntax(source);
                source.Reply(" ");
                source.Reply(_("Sends a passcode to the nickname with instructions on how to\n"
                                "reset their password."));
                return true;
        }
};

struct ResetInfo : ExtensibleItem
{
        Anope::string code;
        time_t time;
};

class NSResetPass : public Module
{
        CommandNSResetPass commandnsresetpass;

 public:
        NSResetPass(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, CORE),
                commandnsresetpass(this)
        {
                this->SetAuthor("Anope");

                if (!Config->UseMail)
                        throw ModuleException("Not using mail.");


                ModuleManager::Attach(I_OnPreCommand, this);
        }

        ~NSResetPass()
        {
                for (nickcore_map::const_iterator it = NickCoreList->begin(), it_end = NickCoreList->end(); it != it_end; ++it)
                        it->second->Shrink("ns_resetpass");
        }

        EventReturn OnPreCommand(CommandSource &source, Command *command, std::vector<Anope::string> &params) anope_override
        {
                if (command->name == "nickserv/confirm" && params.size() > 1)
                {
                        NickAlias *na = NickAlias::Find(params[0]);

                        ResetInfo *ri = na ? na->nc->GetExt<ResetInfo *>("ns_resetpass") : NULL;
                        if (na && ri)
                        {
                                NickCore *nc = na->nc;
                                const Anope::string &passcode = params[1];
                                if (ri->time < Anope::CurTime - 3600)
                                {
                                        nc->Shrink("ns_resetpass");
                                        source.Reply(_("Your password reset request has expired."));
                                }
                                else if (passcode.equals_cs(ri->code))
                                {
                                        nc->Shrink("ns_resetpass");

                                        Log(LOG_COMMAND, source, &commandnsresetpass) << "confirmed RESETPASS to forcefully identify as " << na->nick;

                                        nc->Shrink("UNCONFIRMED");

                                        if (source.GetUser())
                                        {
                                                source.GetUser()->Identify(na);
                                                source.Reply(_("You are now identified for your nick. Change your password now."));
                                        }
                                }
                                else
                                        return EVENT_CONTINUE;

                                return EVENT_STOP;
                        }
                }

                return EVENT_CONTINUE;
        }
};

static bool SendResetEmail(User *u, const NickAlias *na, const BotInfo *bi)
{
        int min = 1, max = 62;
        int chars[] = {
                ' ', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
                'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
                'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
                'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y',
                'Z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'
        };

        Anope::string passcode;
        int idx;
        for (idx = 0; idx < 20; ++idx)
                passcode += chars[1 + static_cast<int>((static_cast<float>(max - min)) * static_cast<uint16_t>(rand()) / 65536.0) + min];

        Anope::string subject = Language::Translate(na->nc, Config->MailResetSubject.c_str());
        Anope::string message = Language::Translate(na->nc, Config->MailResetMessage.c_str());

        subject = subject.replace_all_cs("%n", na->nick);
        subject = subject.replace_all_cs("%N", Config->NetworkName);
        subject = subject.replace_all_cs("%c", passcode);

        message = message.replace_all_cs("%n", na->nick);
        message = message.replace_all_cs("%N", Config->NetworkName);
        message = message.replace_all_cs("%c", passcode);

        ResetInfo *ri = new ResetInfo;
        ri->code = passcode;
        ri->time = Anope::CurTime;
        NickCore *nc = na->nc;
        nc->Extend("ns_resetpass", ri);

        return Mail::Send(u, nc, bi, subject, message);
}

MODULE_INIT(NSResetPass)