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home » brain » inspircd-cvs » inspircd » src » modules » extra

m_ssl_oper_cert.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 MD5 encrypted oper passwords */
/* $ModDep: transport.h */

#include "inspircd.h"
#include "transport.h"

class cmd_fingerprint : public Command
{
 public:
        cmd_fingerprint (InspIRCd* Instance) : Command(Instance,"FINGERPRINT", 0, 1)
        {
                this->source = "m_ssl_oper_cert.so";
                syntax = "<nickname>";
        }

        CmdResult Handle (const std::vector<std::string> &parameters, User *user)
        {
                User* target = ServerInstance->FindNick(parameters[0]);
                if (target)
                {
                        ssl_cert* cert;
                        if (target->GetExt("ssl_cert",cert))
                        {
                                if (cert->GetFingerprint().length())
                                {
                                        user->WriteServ("NOTICE %s :Certificate fingerprint for %s is %s",user->nick.c_str(),target->nick.c_str(),cert->GetFingerprint().c_str());
                                        return CMD_SUCCESS;
                                }
                                else
                                {
                                        user->WriteServ("NOTICE %s :Certificate fingerprint for %s does not exist!", user->nick.c_str(),target->nick.c_str());
                                        return CMD_FAILURE;
                                }
                        }
                        else
                        {
                                user->WriteServ("NOTICE %s :Certificate fingerprint for %s does not exist!", user->nick.c_str(), target->nick.c_str());
                                return CMD_FAILURE;
                        }
                }
                else
                {
                        user->WriteNumeric(401, "%s %s :No such nickname", user->nick.c_str(), parameters[0].c_str());
                        return CMD_FAILURE;
                }
        }
};



class ModuleOperSSLCert : public Module
{
        ssl_cert* cert;
        bool HasCert;
        cmd_fingerprint* mycommand;
        ConfigReader* cf;
 public:

        ModuleOperSSLCert(InspIRCd* Me)
                : Module(Me)
        {
                mycommand = new cmd_fingerprint(ServerInstance);
                ServerInstance->AddCommand(mycommand);
                cf = new ConfigReader(ServerInstance);
                Implementation eventlist[] = { I_OnPreCommand, I_OnRehash };
                ServerInstance->Modules->Attach(eventlist, this, 2);
        }

        virtual ~ModuleOperSSLCert()
        {
                delete cf;
        }


        virtual void OnRehash(User* user, const std::string &parameter)
        {
                delete cf;
                cf = new ConfigReader(ServerInstance);
        }

        bool OneOfMatches(const char* host, const char* ip, const char* hostlist)
        {
                std::stringstream hl(hostlist);
                std::string xhost;
                while (hl >> xhost)
                {
                        if (InspIRCd::Match(host, xhost) || InspIRCd::MatchCIDR(ip, xhost))
                        {
                                return true;
                        }
                }
                return false;
        }

        virtual int OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
        {
                irc::string cmd = command.c_str();

                if ((cmd == "OPER") && (validated))
                {
                        char TheHost[MAXBUF];
                        char TheIP[MAXBUF];
                        std::string LoginName;
                        std::string Password;
                        std::string OperType;
                        std::string HostName;
                        std::string HashType;
                        std::string FingerPrint;
                        bool SSLOnly;
                        char* dummy;

                        snprintf(TheHost,MAXBUF,"%s@%s",user->ident.c_str(),user->host.c_str());
                        snprintf(TheIP, MAXBUF,"%s@%s",user->ident.c_str(),user->GetIPString());

                        HasCert = user->GetExt("ssl_cert",cert);

                        for (int i = 0; i < cf->Enumerate("oper"); i++)
                        {
                                LoginName = cf->ReadValue("oper", "name", i);
                                Password = cf->ReadValue("oper", "password", i);
                                OperType = cf->ReadValue("oper", "type", i);
                                HostName = cf->ReadValue("oper", "host", i);
                                HashType = cf->ReadValue("oper", "hash", i);
                                FingerPrint = cf->ReadValue("oper", "fingerprint", i);
                                SSLOnly = cf->ReadFlag("oper", "sslonly", i);

                                if (FingerPrint.empty() && !SSLOnly)
                                        continue;

                                if (LoginName != parameters[0])
                                        continue;

                                if (!OneOfMatches(TheHost, TheIP, HostName.c_str()))
                                        continue;

                                if (Password.length() && ServerInstance->PassCompare(user, Password.c_str(),parameters[1].c_str(), HashType.c_str()))
                                        continue;

                                if (SSLOnly && !user->GetExt("ssl", dummy))
                                {
                                        user->WriteNumeric(491, "%s :This oper login name requires an SSL connection.", user->nick.c_str());
                                        return 1;
                                }

                                /*
                                 * No cert found or the fingerprint doesn't match
                                 */
                                if ((!cert) || (cert->GetFingerprint() != FingerPrint))
                                {
                                        user->WriteNumeric(491, "%s :This oper login name requires a matching key fingerprint.",user->nick.c_str());
                                        ServerInstance->SNO->WriteToSnoMask('o',"'%s' cannot oper, does not match fingerprint", user->nick.c_str());
                                        ServerInstance->Logs->Log("m_ssl_oper_cert",DEFAULT,"OPER: Failed oper attempt by %s!%s@%s: credentials valid, but wrong fingerprint.", user->nick.c_str(), user->ident.c_str(), user->host.c_str());
                                        return 1;
                                }
                        }
                }

                // Let core handle it for extra stuff
                return 0;
        }

        virtual Version GetVersion()
        {
                return Version("$Id: m_ssl_oper_cert.cpp 10782 2008-11-01 20:22:48Z w00t $", VF_VENDOR, API_VERSION);
        }
};

MODULE_INIT(ModuleOperSSLCert)