trunk/modules/m_challenge.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  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
 *
 *  $Id$
 */

#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"
/* -lcrypto is implicit for building this module! */
#include "rsa.h"
#include "msg.h"
#include "parse.h"
#include "irc_string.h"
#include "s_log.h"
#include "s_user.h"

static void failed_challenge_notice(struct Client *, const char *,
                                    const char *);
static void m_challenge(struct Client *, struct Client *, int, char **);

/* 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_ignore, m_challenge, m_ignore }
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&challenge_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&challenge_msgtab);
}

const char *_version = "$Revision$";
#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;
  struct ConfItem *conf=NULL;
  struct AccessItem *aconf=NULL;

  assert(source_p->localClient);

  /* 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]);
    send_message_file(source_p, &ConfigFileEntry.opermotd);
    return;
  }

  if (*parv[1] == '+')
  {
    /* Ignore it if we aren't expecting this... -A1kmm */
    if (!source_p->localClient->response)
      return;

    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;
    }
     
    if ((conf = find_exact_name_conf(OPER_TYPE,
                                     source_p->localClient->auth_oper,
                                     source_p->username, source_p->host
                                   )) == NULL)
    {
      sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, parv[0]);
      log_oper_action(LOG_FAILED_OPER_TYPE, source_p, "%s\n",
                      source_p->localClient->auth_oper);
      return;
    }

    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!");
      log_oper_action(LOG_FAILED_OPER_TYPE, source_p, "%s\n", 
                      source_p->localClient->auth_oper);
      return;
    }

    oper_up(source_p);

    ilog(L_TRACE, "OPER %s by %s!%s@%s",
         source_p->localClient->auth_oper, source_p->name, source_p->username,
         source_p->host);
    log_oper_action(LOG_OPER_TYPE, source_p,
                    "%s\n", source_p->localClient->auth_oper);

    MyFree(source_p->localClient->response);
    MyFree(source_p->localClient->auth_oper);
    source_p->localClient->response  = NULL;
    source_p->localClient->auth_oper = NULL;
    return;
  }

  MyFree(source_p->localClient->response);
  MyFree(source_p->localClient->auth_oper);
  source_p->localClient->response  = NULL;
  source_p->localClient->auth_oper = NULL;

  if ((conf = find_conf_exact(OPER_TYPE,
                              parv[1], source_p->username, source_p->host
                              )) != NULL)
  {
    aconf = (struct AccessItem *)map_to_conf(conf);
  }
  else if ((conf = find_conf_exact(OPER_TYPE,
                                   parv[1], source_p->username,
                                   source_p->sockhost)) != NULL)
  {
    aconf = (struct AccessItem *)map_to_conf(conf);
  }

  if(aconf == NULL)
  {
    sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, parv[0]);
    conf = find_exact_name_conf(OPER_TYPE, parv[1], NULL, NULL);
    failed_challenge_notice(source_p, parv[1], (conf != NULL)
                            ? "host mismatch" : "no oper {} block");
    log_oper_action(LOG_FAILED_OPER_TYPE, source_p, "%s\n", parv[1]);
    return;
  }

  if (aconf->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,
                parv[0]);
    return;
  }

  if (!generate_challenge(&challenge, &(source_p->localClient->response),
                          aconf->rsa_public_key))
    sendto_one(source_p, form_str(RPL_RSACHALLENGE),
               me.name, parv[0], challenge);

  DupString(source_p->localClient->auth_oper, conf->name);
  MyFree(challenge);
}

/* 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, "Failed CHALLENGE attempt as %s "
                         "by %s (%s@%s) - %s", name, source_p->name,
                         source_p->username, source_p->host, reason);
}
Revision:	32
Committed:	Sun Oct 2 20:41:23 2005 UTC (19 years, 11 months ago) by knight
Content type:	text/x-csrc
Original Path:	*ircd-hybrid/modules/m_challenge.c*
File size:	6101 byte(s)
Log Message:	- svn:keywords
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_challenge.c: Allows an IRC Operator to securely authenticate.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26			#include "handlers.h"
27			#include "client.h"
28			#include "ircd.h"
29			#include "modules.h"
30			#include "numeric.h"
31			#include "send.h"
32			#include "s_conf.h"
33			/* -lcrypto is implicit for building this module! */
34			#include "rsa.h"
35			#include "msg.h"
36			#include "parse.h"
37			#include "irc_string.h"
38			#include "s_log.h"
39			#include "s_user.h"
40
41			static void failed_challenge_notice(struct Client , const char ,
42			const char *);
43			static void m_challenge(struct Client , struct Client , int, char **);
44
45			/* We have openssl support, so include /CHALLENGE */
46			struct Message challenge_msgtab = {
47			"CHALLENGE", 0, 0, 2, 0, MFLG_SLOW, 0,
48			{ m_unregistered, m_challenge, m_ignore, m_ignore, m_challenge, m_ignore }
49			};
50
51			#ifndef STATIC_MODULES
52			void
53			_modinit(void)
54			{
55			mod_add_cmd(&challenge_msgtab);
56			}
57
58			void
59			_moddeinit(void)
60			{
61			mod_del_cmd(&challenge_msgtab);
62			}
63
64	knight	31	const char *_version = "$Revision$";
65	adx	30	#endif
66
67			/*
68			* m_challenge - generate RSA challenge for wouldbe oper
69			* parv[0] = sender prefix
70			* parv[1] = operator to challenge for, or +response
71			*
72			*/
73			static void
74			m_challenge(struct Client client_p, struct Client source_p,
75			int parc, char *parv[])
76			{
77			char *challenge;
78			struct ConfItem *conf=NULL;
79			struct AccessItem *aconf=NULL;
80
81			assert(source_p->localClient);
82
83			/* if theyre an oper, reprint oper motd and ignore */
84			if (IsOper(source_p))
85			{
86			sendto_one(source_p, form_str(RPL_YOUREOPER), me.name, parv[0]);
87			send_message_file(source_p, &ConfigFileEntry.opermotd);
88			return;
89			}
90
91			if (*parv[1] == '+')
92			{
93			/* Ignore it if we aren't expecting this... -A1kmm */
94			if (!source_p->localClient->response)
95			return;
96
97			if (irccmp(source_p->localClient->response, ++parv[1]))
98			{
99			sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name,
100			source_p->name);
101			failed_challenge_notice(source_p, source_p->localClient->auth_oper,
102			"challenge failed");
103			return;
104			}
105
106			if ((conf = find_exact_name_conf(OPER_TYPE,
107			source_p->localClient->auth_oper,
108			source_p->username, source_p->host
109			)) == NULL)
110			{
111			sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, parv[0]);
112			log_oper_action(LOG_FAILED_OPER_TYPE, source_p, "%s\n",
113			source_p->localClient->auth_oper);
114			return;
115			}
116
117			if (attach_conf(source_p, conf) != 0)
118			{
119			sendto_one(source_p,":%s NOTICE %s :Can't attach conf!",
120			me.name, source_p->name);
121			failed_challenge_notice(source_p, conf->name, "can't attach conf!");
122			log_oper_action(LOG_FAILED_OPER_TYPE, source_p, "%s\n",
123			source_p->localClient->auth_oper);
124			return;
125			}
126
127			oper_up(source_p);
128
129			ilog(L_TRACE, "OPER %s by %s!%s@%s",
130			source_p->localClient->auth_oper, source_p->name, source_p->username,
131			source_p->host);
132			log_oper_action(LOG_OPER_TYPE, source_p,
133			"%s\n", source_p->localClient->auth_oper);
134
135			MyFree(source_p->localClient->response);
136			MyFree(source_p->localClient->auth_oper);
137			source_p->localClient->response = NULL;
138			source_p->localClient->auth_oper = NULL;
139			return;
140			}
141
142			MyFree(source_p->localClient->response);
143			MyFree(source_p->localClient->auth_oper);
144			source_p->localClient->response = NULL;
145			source_p->localClient->auth_oper = NULL;
146
147			if ((conf = find_conf_exact(OPER_TYPE,
148			parv[1], source_p->username, source_p->host
149			)) != NULL)
150			{
151			aconf = (struct AccessItem *)map_to_conf(conf);
152			}
153			else if ((conf = find_conf_exact(OPER_TYPE,
154			parv[1], source_p->username,
155			source_p->sockhost)) != NULL)
156			{
157			aconf = (struct AccessItem *)map_to_conf(conf);
158			}
159
160			if(aconf == NULL)
161			{
162			sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, parv[0]);
163			conf = find_exact_name_conf(OPER_TYPE, parv[1], NULL, NULL);
164			failed_challenge_notice(source_p, parv[1], (conf != NULL)
165			? "host mismatch" : "no oper {} block");
166			log_oper_action(LOG_FAILED_OPER_TYPE, source_p, "%s\n", parv[1]);
167			return;
168			}
169
170			if (aconf->rsa_public_key == NULL)
171			{
172			sendto_one (source_p, ":%s NOTICE %s :I'm sorry, PK authentication "
173			"is not enabled for your oper{} block.", me.name,
174			parv[0]);
175			return;
176			}
177
178			if (!generate_challenge(&challenge, &(source_p->localClient->response),
179			aconf->rsa_public_key))
180			sendto_one(source_p, form_str(RPL_RSACHALLENGE),
181			me.name, parv[0], challenge);
182
183			DupString(source_p->localClient->auth_oper, conf->name);
184			MyFree(challenge);
185			}
186
187			/* failed_challenge_notice()
188			*
189			* inputs - pointer to client doing /oper ...
190			* - pointer to nick they tried to oper as
191			* - pointer to reason they have failed
192			* output - nothing
193			* side effects - notices all opers of the failed oper attempt if enabled
194			*/
195			static void
196			failed_challenge_notice(struct Client source_p, const char name,
197			const char *reason)
198			{
199			if (ConfigFileEntry.failed_oper_notice)
200			sendto_realops_flags(UMODE_ALL, L_ALL, "Failed CHALLENGE attempt as %s "
201			"by %s (%s@%s) - %s", name, source_p->name,
202			source_p->username, source_p->host, reason);
203			}