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/*
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
*
* Copyright (c) 2000-2014 ircd-hybrid development team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
/*! \file m_challenge.c
* \brief Includes required functions for processing the CHALLENGE command.
* \version $Id$
*/
#include "stdinc.h"
#include "client.h"
#include "ircd.h"
#include "modules.h"
#include "numeric.h"
#include "send.h"
#include "conf.h"
#include "rsa.h"
#include "parse.h"
#include "irc_string.h"
#include "log.h"
#include "s_user.h"
#include "memory.h"
#ifdef HAVE_LIBCRYPTO
/* failed_challenge_notice()
*
* inputs - pointer to client doing /oper ...
* - pointer to nick they tried to oper as
* - pointer to reason they have failed
* output - nothing
* side effects - notices all opers of the failed oper attempt if enabled
*/
static void
failed_challenge_notice(struct Client *source_p, const char *name,
const char *reason)
{
if (ConfigFileEntry.failed_oper_notice)
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
"Failed CHALLENGE attempt as %s "
"by %s (%s@%s) - %s", name, source_p->name,
source_p->username, source_p->host, reason);
ilog(LOG_TYPE_OPER, "Failed CHALLENGE attempt as %s "
"by %s (%s@%s) - %s", name, source_p->name,
source_p->username, source_p->host, reason);
}
/*
* m_challenge - generate RSA challenge for wouldbe oper
* parv[0] = sender prefix
* parv[1] = operator to challenge for, or +response
*
*/
static int
m_challenge(struct Client *client_p, struct Client *source_p,
int parc, char *parv[])
{
char *challenge = NULL;
struct MaskItem *conf = NULL;
if (*parv[1] == '+')
{
/* Ignore it if we aren't expecting this... -A1kmm */
if (source_p->localClient->response == NULL)
return 0;
if (irccmp(source_p->localClient->response, ++parv[1]))
{
sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name,
source_p->name);
failed_challenge_notice(source_p, source_p->localClient->auth_oper,
"challenge failed");
return 0;
}
conf = find_exact_name_conf(CONF_OPER, source_p,
source_p->localClient->auth_oper, NULL, NULL);
if (conf == NULL)
{
sendto_one(source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
conf = find_exact_name_conf(CONF_OPER, NULL, source_p->localClient->auth_oper, NULL, NULL);
failed_challenge_notice(source_p, source_p->localClient->auth_oper, (conf != NULL) ?
"host mismatch" : "no oper {} block");
return 0;
}
if (attach_conf(source_p, conf) != 0)
{
sendto_one(source_p,":%s NOTICE %s :Can't attach conf!",
me.name, source_p->name);
failed_challenge_notice(source_p, conf->name, "can't attach conf!");
return 0;
}
oper_up(source_p);
ilog(LOG_TYPE_OPER, "OPER %s by %s!%s@%s",
source_p->localClient->auth_oper, source_p->name, source_p->username,
source_p->host);
MyFree(source_p->localClient->response);
MyFree(source_p->localClient->auth_oper);
source_p->localClient->response = NULL;
source_p->localClient->auth_oper = NULL;
return 0;
}
MyFree(source_p->localClient->response);
MyFree(source_p->localClient->auth_oper);
source_p->localClient->response = NULL;
source_p->localClient->auth_oper = NULL;
conf = find_exact_name_conf(CONF_OPER, source_p, parv[1], NULL, NULL);
if (!conf)
{
sendto_one(source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
conf = find_exact_name_conf(CONF_OPER, NULL, parv[1], NULL, NULL);
failed_challenge_notice(source_p, parv[1], (conf != NULL)
? "host mismatch" : "no oper {} block");
return 0;
}
if (conf->rsa_public_key == NULL)
{
sendto_one(source_p, ":%s NOTICE %s :I'm sorry, PK authentication "
"is not enabled for your oper{} block.", me.name,
source_p->name);
return 0;
}
if (IsConfSSL(conf) && !HasUMode(source_p, UMODE_SSL))
{
sendto_one(source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
failed_challenge_notice(source_p, conf->name, "requires SSL/TLS");
return 0;
}
if (!EmptyString(conf->certfp))
{
if (EmptyString(source_p->certfp) || strcasecmp(source_p->certfp, conf->certfp))
{
sendto_one(source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
failed_challenge_notice(source_p, conf->name, "client certificate fingerprint mismatch");
return 0;
}
}
if (!generate_challenge(&challenge, &source_p->localClient->response,
conf->rsa_public_key))
{
sendto_one(source_p, form_str(RPL_RSACHALLENGE),
me.name, source_p->name, challenge);
source_p->localClient->auth_oper = xstrdup(conf->name);
}
MyFree(challenge);
return 0;
}
static int
mo_challenge(struct Client *client_p, struct Client *source_p,
int parc, char *parv[])
{
sendto_one(source_p, form_str(RPL_YOUREOPER),
me.name, source_p->name);
return 0;
}
static struct Message challenge_msgtab =
{
"CHALLENGE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
{ m_unregistered, m_challenge, m_ignore, m_ignore, mo_challenge, m_ignore }
};
static void
module_init(void)
{
mod_add_cmd(&challenge_msgtab);
}
static void
module_exit(void)
{
mod_del_cmd(&challenge_msgtab);
}
#else
static void
module_init(void)
{
}
static void
module_exit(void)
{
}
#endif
struct module module_entry =
{
.node = { NULL, NULL, NULL },
.name = NULL,
.version = "$Revision$",
.handle = NULL,
.modinit = module_init,
.modexit = module_exit,
.flags = 0
};
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