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

  if (aconf == NULL)
  {
    sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
    conf = find_exact_name_conf(OPER_TYPE, NULL, parv[1], NULL, NULL);
    failed_challenge_notice(source_p, parv[1], (conf != NULL)
                            ? "host mismatch" : "no oper {} block");
    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,
                source_p->name);
    return;
  }

  if (!generate_challenge(&challenge, &(source_p->localClient->response),
                          aconf->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:	1467
Committed:	Fri Jul 20 16:08:23 2012 UTC (13 years, 1 month ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/m_challenge.c*
File size:	5867 byte(s)
Log Message:	- m_challenge.c: add mo_challenge() which now takes care of operators issuing the CHALLENGE command
#	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			sendto_realops_flags(UMODE_ALL, L_ALL, "Failed CHALLENGE attempt as %s "
54			"by %s (%s@%s) - %s", name, source_p->name,
55			source_p->username, source_p->host, reason);
56	michael	1247
57			ilog(LOG_TYPE_OPER, "Failed CHALLENGE attempt as %s "
58			"by %s (%s@%s) - %s", name, source_p->name,
59			source_p->username, source_p->host, reason);
60	adx	30	}
61
62			/*
63			* m_challenge - generate RSA challenge for wouldbe oper
64			* parv[0] = sender prefix
65			* parv[1] = operator to challenge for, or +response
66			*
67			*/
68			static void
69			m_challenge(struct Client client_p, struct Client source_p,
70			int parc, char *parv[])
71			{
72	michael	817	char *challenge = NULL;
73			struct ConfItem *conf = NULL;
74			struct AccessItem *aconf = 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	1285	conf = find_exact_name_conf(OPER_TYPE, source_p,
92			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			if ((conf = find_conf_exact(OPER_TYPE,
127			parv[1], source_p->username, source_p->host
128			)) != NULL)
129	michael	817	aconf = map_to_conf(conf);
130	adx	30	else if ((conf = find_conf_exact(OPER_TYPE,
131			parv[1], source_p->username,
132			source_p->sockhost)) != NULL)
133	michael	817	aconf = map_to_conf(conf);
134	adx	30
135	michael	817	if (aconf == NULL)
136	adx	30	{
137	michael	1230	sendto_one (source_p, form_str(ERR_NOOPERHOST), me.name, source_p->name);
138	michael	1285	conf = find_exact_name_conf(OPER_TYPE, NULL, parv[1], NULL, NULL);
139	adx	30	failed_challenge_notice(source_p, parv[1], (conf != NULL)
140			? "host mismatch" : "no oper {} block");
141			return;
142			}
143
144			if (aconf->rsa_public_key == NULL)
145			{
146			sendto_one (source_p, ":%s NOTICE %s :I'm sorry, PK authentication "
147			"is not enabled for your oper{} block.", me.name,
148	michael	1230	source_p->name);
149	adx	30	return;
150			}
151
152			if (!generate_challenge(&challenge, &(source_p->localClient->response),
153			aconf->rsa_public_key))
154			sendto_one(source_p, form_str(RPL_RSACHALLENGE),
155	michael	1230	me.name, source_p->name, challenge);
156	adx	30
157			DupString(source_p->localClient->auth_oper, conf->name);
158			MyFree(challenge);
159			}
160
161	michael	1467	static void
162			mo_challenge(struct Client client_p, struct Client source_p,
163			int parc, char *parv[])
164			{
165			sendto_one(source_p, form_str(RPL_YOUREOPER),
166			me.name, source_p->name);
167			}
168
169	michael	1230	static struct Message challenge_msgtab = {
170			"CHALLENGE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
171	michael	1467	{ m_unregistered, m_challenge, m_ignore, m_ignore, mo_challenge, m_ignore }
172	michael	1230	};
173
174	adx	30	static void
175	michael	1230	module_init(void)
176	adx	30	{
177	michael	1230	mod_add_cmd(&challenge_msgtab);
178	adx	30	}
179	michael	1230
180			static void
181			module_exit(void)
182			{
183			mod_del_cmd(&challenge_msgtab);
184			}
185
186	michael	1415	#else
187
188			static void
189			module_init(void)
190			{
191			}
192
193			static void
194			module_exit(void)
195			{
196			}
197			#endif
198
199	michael	1230	struct module module_entry = {
200			.node = { NULL, NULL, NULL },
201			.name = NULL,
202			.version = "$Revision$",
203			.handle = NULL,
204			.modinit = module_init,
205			.modexit = module_exit,
206			.flags = 0
207			};