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NeoStats-NeoIRCd/modules/m_challenge.c

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/*
* NeoIRCd: NeoStats Group. Based on Hybird7
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* m_challenge.c: Allows an IRC Operator to securely authenticate.
*
* Copyright (C) 2002 by the past and present ircd coders, and others.
*
* 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
*
* $Id: m_challenge.c,v 1.7 2003/01/29 09:28:48 fishwaldo Exp $
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*/
#include "stdinc.h"
#include "handlers.h"
#include "client.h"
#include "ircd.h"
#include "modules.h"
#include "numeric.h"
#include "send.h"
#include "s_conf.h"
#ifdef HAVE_LIBCRYPTO
#include "rsa.h"
#endif
#include "msg.h"
#include "parse.h"
#include "irc_string.h"
#include "s_log.h"
int oper_up( struct Client *source_p, struct ConfItem *aconf );
#ifndef HAVE_LIBCRYPTO
/* Maybe this should be an error or something?-davidt */
#ifndef STATIC_MODULES
void
_modinit(void)
{
return;
}
void
_moddeinit(void)
{
return;
}
const char *_version = "$Revision: 1.7 $";
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#endif
#else
static void failed_challenge_notice(struct Client *, char *, char *);
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static void m_challenge(struct Client*, struct Client*, int, char**);
void binary_to_hex( unsigned char * bin, char * hex, int length );
/* We have openssl support, so include /CHALLENGE */
struct Message challenge_msgtab = {
"CHALLENGE", 0, 0, 2, 0, MFLG_SLOW, 0,
{m_unregistered, m_challenge, m_ignore, m_challenge}
};
#ifndef STATIC_MODULES
void
_modinit(void)
{
mod_add_cmd(&challenge_msgtab);
}
void
_moddeinit(void)
{
mod_del_cmd(&challenge_msgtab);
}
const char *_version = "$Revision: 1.7 $";
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#endif
/*
* m_challenge - generate RSA challenge for wouldbe oper
* parv[0] = sender prefix
* parv[1] = operator to challenge for, or +response
*
*/
static void m_challenge( struct Client *client_p, struct Client *source_p,
int parc, char *parv[] )
{
char * challenge;
dlink_node *ptr;
struct ConfItem *aconf, *oconf;
if(!(source_p->user) || !source_p->localClient)
return;
/* if theyre an oper, reprint oper motd and ignore */
if(IsOper(source_p))
{
sendto_one(source_p, form_str(RPL_YOUREOPER), me.name, parv[0]);
SendMessageFile(source_p, &ConfigFileEntry.opermotd);
return;
}
if (*parv[1] == '+')
{
/* Ignore it if we aren't expecting this... -A1kmm */
if (!source_p->user->response)
return;
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if (irccmp(source_p->user->response, ++parv[1]))
{
sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name,
source_p->name);
failed_challenge_notice(source_p, source_p->user->auth_oper, "challenge failed");
return;
}
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if (!(aconf = find_conf_by_name(source_p->user->auth_oper, CONF_OPERATOR)))
{
sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, parv[0]);
log_failed_oper(source_p, source_p->user->auth_oper);
return;
}
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ptr = source_p->localClient->confs.head;
oconf = ptr->data;
detach_conf(source_p,oconf);
if(attach_conf(source_p, aconf) != 0)
{
sendto_one(source_p,":%s NOTICE %s :Can't attach conf!",
me.name,source_p->name);
sendto_realops_flags(FLAGS_ALL|FLAGS_REMOTE, L_ALL,
"Failed OPER attempt by %s (%s@%s) can't attach conf!",
source_p->name, source_p->username, source_p->host);
attach_conf(source_p, oconf);
log_failed_oper(source_p, source_p->user->auth_oper);
return;
}
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oper_up(source_p, aconf);
ilog(L_TRACE, "OPER %s by %s!%s@%s",
source_p->user->auth_oper, source_p->name, source_p->username,
source_p->host);
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log_oper(source_p, source_p->user->auth_oper);
MyFree(source_p->user->response);
MyFree(source_p->user->auth_oper);
source_p->user->response = NULL;
source_p->user->auth_oper = NULL;
return;
}
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MyFree(source_p->user->response);
MyFree(source_p->user->auth_oper);
source_p->user->response = NULL;
source_p->user->auth_oper = NULL;
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if (!(aconf = find_conf_exact(parv[1], source_p->username, source_p->host,
CONF_OPERATOR)) &&
!(aconf = find_conf_exact(parv[1], source_p->username,
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source_p->localClient->sockhost,
CONF_OPERATOR)))
{
sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, parv[0]);
/* they suck, do we tell the world? */
if (ConfigFileEntry.failed_oper_notice)
{
sendto_realops_flags(FLAGS_ALL, L_ALL, "Failed CHALLENGE attempt - host"
" mismatch by %s (%s@%s)",
source_p->name, source_p->username, source_p->host);
}
log_failed_oper(source_p, parv[1]);
return;
}
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if (!aconf->rsa_public_key)
{
sendto_one (source_p, ":%s NOTICE %s :I'm sorry, PK authentication "
"is not enabled for your oper{} block.", me.name,
parv[0]);
return;
}
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if (
!generate_challenge (&challenge, &(source_p->user->response), aconf->rsa_public_key)
)
{
sendto_one (source_p, form_str(RPL_RSACHALLENGE), me.name, parv[0],
challenge);
}
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DupString(source_p->user->auth_oper, aconf->name);
MyFree(challenge);
return;
}
/*
* 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, char *name, char *reason)
{
if (ConfigFileEntry.failed_oper_notice)
sendto_realops_flags(FLAGS_ALL | FLAGS_REMOTE, L_ALL, "Failed CHALLENGE attempt as %s "
"by %s (%s@%s) - %s", name, source_p->name,
source_p->username, source_p->host, reason);
}
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#endif /* HAVE_LIBCRYPTO */