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 "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"


#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 void
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;

    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;
    }
    
    conf = find_exact_name_conf(CONF_OPER, source_p,
                                source_p->localClient->auth_oper, NULL, NULL);
    if (conf == NULL)
    {
      /* XXX: logging */
      sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
      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!");
      return;
    }

    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;
  }

  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(CONF_OPER,
                              parv[1], source_p->username, source_p->host)))
    ;
  else if ((conf = find_conf_exact(CONF_OPER, parv[1], source_p->username,
                                   source_p->sockhost)))
    ;

  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;
  }

  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;
  }

  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);

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

static void
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);
}

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
};
Revision:	1632
Committed:	Sun Nov 4 15:37:10 2012 UTC (12 years, 9 months ago) by michael
Content type:	text/x-csrc
File size:	5777 byte(s)
Log Message:	- Initial rewrite of the configuration subsystem
#	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 "client.h"
27			#include "ircd.h"
28			#include "modules.h"
29			#include "numeric.h"
30			#include "send.h"
31	michael	1309	#include "conf.h"
32	adx	30	#include "rsa.h"
33			#include "parse.h"
34			#include "irc_string.h"
35	michael	1309	#include "log.h"
36	adx	30	#include "s_user.h"
37
38
39	michael	1415	#ifdef HAVE_LIBCRYPTO
40	michael	1230	/* failed_challenge_notice()
41			*
42			* inputs - pointer to client doing /oper ...
43			* - pointer to nick they tried to oper as
44			* - pointer to reason they have failed
45			* output - nothing
46			* side effects - notices all opers of the failed oper attempt if enabled
47			*/
48			static void
49			failed_challenge_notice(struct Client source_p, const char name,
50			const char *reason)
51	adx	30	{
52	michael	1230	if (ConfigFileEntry.failed_oper_notice)
53	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
54			"Failed CHALLENGE attempt as %s "
55	michael	1230	"by %s (%s@%s) - %s", name, source_p->name,
56			source_p->username, source_p->host, reason);
57	michael	1247
58			ilog(LOG_TYPE_OPER, "Failed CHALLENGE attempt as %s "
59			"by %s (%s@%s) - %s", name, source_p->name,
60			source_p->username, source_p->host, reason);
61	adx	30	}
62
63			/*
64			* m_challenge - generate RSA challenge for wouldbe oper
65			* parv[0] = sender prefix
66			* parv[1] = operator to challenge for, or +response
67			*
68			*/
69			static void
70			m_challenge(struct Client client_p, struct Client source_p,
71			int parc, char *parv[])
72			{
73	michael	817	char *challenge = NULL;
74	michael	1632	struct MaskItem *conf = NULL;
75	adx	30
76			if (*parv[1] == '+')
77			{
78			/* Ignore it if we aren't expecting this... -A1kmm */
79	michael	817	if (source_p->localClient->response == NULL)
80	adx	30	return;
81
82			if (irccmp(source_p->localClient->response, ++parv[1]))
83			{
84			sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name,
85	michael	1121	source_p->name);
86	adx	30	failed_challenge_notice(source_p, source_p->localClient->auth_oper,
87	michael	1121	"challenge failed");
88	adx	30	return;
89			}
90	michael	817
91	michael	1632	conf = find_exact_name_conf(CONF_OPER, source_p,
92	michael	1285	source_p->localClient->auth_oper, NULL, NULL);
93	michael	817	if (conf == NULL)
94	adx	30	{
95	michael	1247	/* XXX: logging */
96	michael	1230	sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
97	adx	30	return;
98			}
99
100			if (attach_conf(source_p, conf) != 0)
101			{
102			sendto_one(source_p,":%s NOTICE %s :Can't attach conf!",
103			me.name, source_p->name);
104			failed_challenge_notice(source_p, conf->name, "can't attach conf!");
105			return;
106			}
107
108			oper_up(source_p);
109
110	michael	1247	ilog(LOG_TYPE_OPER, "OPER %s by %s!%s@%s",
111	adx	30	source_p->localClient->auth_oper, source_p->name, source_p->username,
112			source_p->host);
113
114			MyFree(source_p->localClient->response);
115			MyFree(source_p->localClient->auth_oper);
116			source_p->localClient->response = NULL;
117			source_p->localClient->auth_oper = NULL;
118			return;
119			}
120
121			MyFree(source_p->localClient->response);
122			MyFree(source_p->localClient->auth_oper);
123			source_p->localClient->response = NULL;
124			source_p->localClient->auth_oper = NULL;
125
126	michael	1632	if ((conf = find_conf_exact(CONF_OPER,
127			parv[1], source_p->username, source_p->host)))
128			;
129			else if ((conf = find_conf_exact(CONF_OPER, parv[1], source_p->username,
130			source_p->sockhost)))
131			;
132	adx	30
133	michael	1632	if (!conf)
134	adx	30	{
135	michael	1230	sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
136	michael	1632	conf = find_exact_name_conf(CONF_OPER, NULL, parv[1], NULL, NULL);
137	adx	30	failed_challenge_notice(source_p, parv[1], (conf != NULL)
138			? "host mismatch" : "no oper {} block");
139			return;
140			}
141
142	michael	1632	if (conf->rsa_public_key == NULL)
143	adx	30	{
144			sendto_one (source_p, ":%s NOTICE %s :I'm sorry, PK authentication "
145			"is not enabled for your oper{} block.", me.name,
146	michael	1230	source_p->name);
147	adx	30	return;
148			}
149
150			if (!generate_challenge(&challenge, &(source_p->localClient->response),
151	michael	1632	conf->rsa_public_key))
152	adx	30	sendto_one(source_p, form_str(RPL_RSACHALLENGE),
153	michael	1230	me.name, source_p->name, challenge);
154	adx	30
155			DupString(source_p->localClient->auth_oper, conf->name);
156			MyFree(challenge);
157			}
158
159	michael	1467	static void
160			mo_challenge(struct Client client_p, struct Client source_p,
161			int parc, char *parv[])
162			{
163			sendto_one(source_p, form_str(RPL_YOUREOPER),
164			me.name, source_p->name);
165			}
166
167	michael	1230	static struct Message challenge_msgtab = {
168			"CHALLENGE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
169	michael	1467	{ m_unregistered, m_challenge, m_ignore, m_ignore, mo_challenge, m_ignore }
170	michael	1230	};
171
172	adx	30	static void
173	michael	1230	module_init(void)
174	adx	30	{
175	michael	1230	mod_add_cmd(&challenge_msgtab);
176	adx	30	}
177	michael	1230
178			static void
179			module_exit(void)
180			{
181			mod_del_cmd(&challenge_msgtab);
182			}
183
184	michael	1415	#else
185
186			static void
187			module_init(void)
188			{
189			}
190
191			static void
192			module_exit(void)
193			{
194			}
195			#endif
196
197	michael	1230	struct module module_entry = {
198			.node = { NULL, NULL, NULL },
199			.name = NULL,
200			.version = "$Revision$",
201			.handle = NULL,
202			.modinit = module_init,
203			.modexit = module_exit,
204			.flags = 0
205			};