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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* m_challenge.c: Allows an IRC Operator to securely authenticate. |
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* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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* |
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* $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "conf/conf.h" |
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#include "handlers.h" |
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#include "client.h" |
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#include "ircd.h" |
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#include "numeric.h" |
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#include "send.h" |
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#include "motd.h" |
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/* -lcrypto is implicit for building this module! */ |
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#include "rsa.h" |
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#include "msg.h" |
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#include "parse.h" |
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#include "user.h" |
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|
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static void failed_challenge_notice(struct Client *, const char *, |
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const char *); |
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static void m_challenge(struct Client *, struct Client *, int, char *[]); |
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|
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/* We have openssl support, so include /CHALLENGE */ |
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struct Message challenge_msgtab = { |
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"CHALLENGE", 0, 0, 2, 0, MFLG_SLOW, 0, |
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{ m_unregistered, m_challenge, m_ignore, m_ignore, m_challenge, m_ignore } |
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}; |
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|
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INIT_MODULE(m_challenge, "$Revision$") |
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{ |
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mod_add_cmd(&challenge_msgtab); |
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} |
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|
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CLEANUP_MODULE |
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{ |
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mod_del_cmd(&challenge_msgtab); |
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} |
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|
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/*! \brief CHALLENGE command handler (called for local clients only) |
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* |
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* Generate RSA challenge for wouldbe oper |
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* |
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* \param client_p Pointer to allocated Client struct with physical connection |
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* to this server, i.e. with an open socket connected. |
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* \param source_p Pointer to allocated Client struct from which the message |
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* originally comes from. This can be a local or remote client. |
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* \param parc Integer holding the number of supplied arguments. |
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* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
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* pointers. |
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* \note Valid arguments for this command are: |
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* - parv[0] = sender prefix |
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* - parv[1] = operator to challenge for, or +response |
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*/ |
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static void |
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m_challenge(struct Client *client_p, struct Client *source_p, |
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int parc, char *parv[]) |
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{ |
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char *challenge = NULL; |
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struct OperatorConf *conf = NULL; |
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|
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assert(source_p->localClient); |
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|
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/* if theyre an oper, reprint oper motd and ignore */ |
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if (IsOper(source_p)) |
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{ |
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sendto_one(source_p, form_str(RPL_YOUREOPER), me.name, source_p->name); |
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send_message_file(source_p, &opermotd); |
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return; |
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} |
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|
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if (*parv[1] == '+') |
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{ |
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/* Ignore it if we aren't expecting this... -A1kmm */ |
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if (source_p->localClient->response == NULL) |
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return; |
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|
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if (irccmp(source_p->localClient->response, ++parv[1])) |
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{ |
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sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name, |
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source_p->name); |
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failed_challenge_notice(source_p, source_p->localClient->auth_oper, |
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"challenge failed"); |
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return; |
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} |
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|
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if ((conf = find_operconf(source_p->localClient->auth_oper, |
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source_p->username, source_p->host, |
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&source_p->localClient->ip)) == NULL) |
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{ |
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sendto_one(source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name); |
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log_oper_action(LOG_FAILED_OPER_TYPE, source_p, "%s\n", |
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source_p->localClient->auth_oper); |
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return; |
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} |
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|
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oper_up(source_p, conf); |
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|
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ilog(L_TRACE, "OPER %s by %s!%s@%s", |
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source_p->localClient->auth_oper, source_p->name, source_p->username, |
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source_p->host); |
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log_oper_action(LOG_OPER_TYPE, source_p, |
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"%s\n", source_p->localClient->auth_oper); |
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|
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MyFree(source_p->localClient->response); |
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/* |
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* Do NOT free auth_oper here as it is already done and |
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* a new string is copied to it in oper_up() |
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*/ |
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// MyFree(source_p->localClient->auth_oper); |
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source_p->localClient->response = NULL; |
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// source_p->localClient->auth_oper = NULL; |
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return; |
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} |
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|
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MyFree(source_p->localClient->response); |
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MyFree(source_p->localClient->auth_oper); |
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source_p->localClient->response = NULL; |
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source_p->localClient->auth_oper = NULL; |
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|
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conf = find_operconf(parv[1], source_p->username, source_p->host, |
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&source_p->localClient->ip); |
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if (conf == NULL) |
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{ |
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sendto_one(source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name); |
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conf = find_operconf(parv[1], NULL, NULL, NULL); |
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failed_challenge_notice(source_p, parv[1], (conf != NULL) |
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? "host mismatch" : "no oper {} block"); |
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log_oper_action(LOG_FAILED_OPER_TYPE, source_p, "%s\n", parv[1]); |
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return; |
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} |
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|
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if (conf->rsa_public_key == NULL) |
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{ |
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sendto_one(source_p, ":%s NOTICE %s :I'm sorry, PK authentication " |
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"is not enabled for your oper{} block.", me.name, |
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source_p->name); |
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return; |
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} |
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|
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if (!generate_challenge(&challenge, &(source_p->localClient->response), |
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conf->rsa_public_key)) |
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sendto_one(source_p, form_str(RPL_RSACHALLENGE), |
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me.name, source_p->name, challenge); |
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|
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DupString(source_p->localClient->auth_oper, conf->name); |
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MyFree(challenge); |
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} |
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|
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/* failed_challenge_notice() |
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* |
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* inputs - pointer to client doing /oper ... |
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* - pointer to nick they tried to oper as |
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* - pointer to reason they have failed |
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* output - nothing |
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* side effects - notices all opers of the failed oper attempt if enabled |
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*/ |
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static void |
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failed_challenge_notice(struct Client *source_p, const char *name, |
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const char *reason) |
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{ |
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if (General.failed_oper_notice) |
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sendto_realops_flags(UMODE_ALL, L_ALL, "Failed CHALLENGE attempt as %s " |
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"by %s (%s@%s) - %s", name, source_p->name, |
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source_p->username, source_p->host, reason); |
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} |
