trunk/modules/m_challenge.c

/*
 *  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);
}

/*! \brief CHALLENGE command handler
 *
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = command
 *      - parv[1] = operator to challenge for, or +response
 */
static int
m_challenge(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_numeric(source_p, &me, ERR_PASSWDMISMATCH);
      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_numeric(source_p, &me, ERR_NOOPERHOST);
      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_notice(source_p, &me, ":Can't attach conf!");   
      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_numeric(source_p, &me, ERR_NOOPERHOST);
    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_notice(source_p, &me, ":I'm sorry, PK authentication "
                      "is not enabled for your oper{} block.");
    return 0;
  }

  if (IsConfSSL(conf) && !HasUMode(source_p, UMODE_SSL))
  {
    sendto_one_numeric(source_p, &me, ERR_NOOPERHOST);
    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_numeric(source_p, &me, ERR_NOOPERHOST);
      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_numeric(source_p, &me, RPL_RSACHALLENGE, challenge);

  source_p->localClient->auth_oper = xstrdup(conf->name);
  MyFree(challenge);
  return 0;
}

/*! \brief CHALLENGE command handler
 *
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = command
 *      - parv[1] = operator to challenge for, or +response
 */
static int
mo_challenge(struct Client *source_p, int parc, char *parv[])
{
  sendto_one_numeric(source_p, &me, RPL_YOUREOPER);
  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
};
Revision:	3300
Committed:	Sat Apr 12 18:26:22 2014 UTC (11 years, 4 months ago) by michael
Content type:	text/x-csrc
File size:	7102 byte(s)
Log Message:	- doxygen
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 2000-2014 ircd-hybrid development team
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19	* USA
20	*/
21
22	/*! \file m_challenge.c
23	* \brief Includes required functions for processing the CHALLENGE command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "client.h"
29	#include "ircd.h"
30	#include "modules.h"
31	#include "numeric.h"
32	#include "send.h"
33	#include "conf.h"
34	#include "rsa.h"
35	#include "parse.h"
36	#include "irc_string.h"
37	#include "log.h"
38	#include "s_user.h"
39	#include "memory.h"
40
41
42	#ifdef HAVE_LIBCRYPTO
43	/* failed_challenge_notice()
44	*
45	* inputs - pointer to client doing /oper ...
46	* - pointer to nick they tried to oper as
47	* - pointer to reason they have failed
48	* output - nothing
49	* side effects - notices all opers of the failed oper attempt if enabled
50	*/
51	static void
52	failed_challenge_notice(struct Client source_p, const char name,
53	const char *reason)
54	{
55	if (ConfigFileEntry.failed_oper_notice)
56	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
57	"Failed CHALLENGE attempt as %s "
58	"by %s (%s@%s) - %s", name, source_p->name,
59	source_p->username, source_p->host, reason);
60
61	ilog(LOG_TYPE_OPER, "Failed CHALLENGE attempt as %s "
62	"by %s (%s@%s) - %s", name, source_p->name,
63	source_p->username, source_p->host, reason);
64	}
65
66	/*! \brief CHALLENGE command handler
67	*
68	* \param source_p Pointer to allocated Client struct from which the message
69	* originally comes from. This can be a local or remote client.
70	* \param parc Integer holding the number of supplied arguments.
71	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
72	* pointers.
73	* \note Valid arguments for this command are:
74	* - parv[0] = command
75	* - parv[1] = operator to challenge for, or +response
76	*/
77	static int
78	m_challenge(struct Client source_p, int parc, char parv[])
79	{
80	char *challenge = NULL;
81	struct MaskItem *conf = NULL;
82
83	if (*parv[1] == '+')
84	{
85	/* Ignore it if we aren't expecting this... -A1kmm */
86	if (source_p->localClient->response == NULL)
87	return 0;
88
89	if (irccmp(source_p->localClient->response, ++parv[1]))
90	{
91	sendto_one_numeric(source_p, &me, ERR_PASSWDMISMATCH);
92	failed_challenge_notice(source_p, source_p->localClient->auth_oper,
93	"challenge failed");
94	return 0;
95	}
96
97	conf = find_exact_name_conf(CONF_OPER, source_p,
98	source_p->localClient->auth_oper, NULL, NULL);
99	if (conf == NULL)
100	{
101	sendto_one_numeric(source_p, &me, ERR_NOOPERHOST);
102	conf = find_exact_name_conf(CONF_OPER, NULL, source_p->localClient->auth_oper, NULL, NULL);
103	failed_challenge_notice(source_p, source_p->localClient->auth_oper, (conf != NULL) ?
104	"host mismatch" : "no oper {} block");
105	return 0;
106	}
107
108	if (attach_conf(source_p, conf) != 0)
109	{
110	sendto_one_notice(source_p, &me, ":Can't attach conf!");
111	failed_challenge_notice(source_p, conf->name, "can't attach conf!");
112	return 0;
113	}
114
115	oper_up(source_p);
116
117	ilog(LOG_TYPE_OPER, "OPER %s by %s!%s@%s",
118	source_p->localClient->auth_oper, source_p->name, source_p->username,
119	source_p->host);
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	return 0;
126	}
127
128	MyFree(source_p->localClient->response);
129	MyFree(source_p->localClient->auth_oper);
130	source_p->localClient->response = NULL;
131	source_p->localClient->auth_oper = NULL;
132
133	conf = find_exact_name_conf(CONF_OPER, source_p, parv[1], NULL, NULL);
134
135	if (!conf)
136	{
137	sendto_one_numeric(source_p, &me, ERR_NOOPERHOST);
138	conf = find_exact_name_conf(CONF_OPER, NULL, parv[1], NULL, NULL);
139	failed_challenge_notice(source_p, parv[1], (conf != NULL)
140	? "host mismatch" : "no oper {} block");
141	return 0;
142	}
143
144	if (conf->rsa_public_key == NULL)
145	{
146	sendto_one_notice(source_p, &me, ":I'm sorry, PK authentication "
147	"is not enabled for your oper{} block.");
148	return 0;
149	}
150
151	if (IsConfSSL(conf) && !HasUMode(source_p, UMODE_SSL))
152	{
153	sendto_one_numeric(source_p, &me, ERR_NOOPERHOST);
154	failed_challenge_notice(source_p, conf->name, "requires SSL/TLS");
155	return 0;
156	}
157
158	if (!EmptyString(conf->certfp))
159	{
160	if (EmptyString(source_p->certfp) \|\| strcasecmp(source_p->certfp, conf->certfp))
161	{
162	sendto_one_numeric(source_p, &me, ERR_NOOPERHOST);
163	failed_challenge_notice(source_p, conf->name, "client certificate fingerprint mismatch");
164	return 0;
165	}
166	}
167
168	if (!generate_challenge(&challenge, &(source_p->localClient->response),
169	conf->rsa_public_key))
170	sendto_one_numeric(source_p, &me, RPL_RSACHALLENGE, challenge);
171
172	source_p->localClient->auth_oper = xstrdup(conf->name);
173	MyFree(challenge);
174	return 0;
175	}
176
177	/*! \brief CHALLENGE command handler
178	*
179	* \param source_p Pointer to allocated Client struct from which the message
180	* originally comes from. This can be a local or remote client.
181	* \param parc Integer holding the number of supplied arguments.
182	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
183	* pointers.
184	* \note Valid arguments for this command are:
185	* - parv[0] = command
186	* - parv[1] = operator to challenge for, or +response
187	*/
188	static int
189	mo_challenge(struct Client source_p, int parc, char parv[])
190	{
191	sendto_one_numeric(source_p, &me, RPL_YOUREOPER);
192	return 0;
193	}
194
195	static struct Message challenge_msgtab =
196	{
197	"CHALLENGE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
198	{ m_unregistered, m_challenge, m_ignore, m_ignore, mo_challenge, m_ignore }
199	};
200
201	static void
202	module_init(void)
203	{
204	mod_add_cmd(&challenge_msgtab);
205	}
206
207	static void
208	module_exit(void)
209	{
210	mod_del_cmd(&challenge_msgtab);
211	}
212
213	#else
214
215	static void
216	module_init(void)
217	{
218	}
219
220	static void
221	module_exit(void)
222	{
223	}
224	#endif
225
226	struct module module_entry =
227	{
228	.node = { NULL, NULL, NULL },
229	.name = NULL,
230	.version = "$Revision$",
231	.handle = NULL,
232	.modinit = module_init,
233	.modexit = module_exit,
234	.flags = 0
235	};