2 * Copyright (C) 2006 Michael Tharp <gxti@partiallystapled.com>
3 * Copyright (C) 2006 charybdis development team
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
9 * 1.Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * 2.Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3.The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
29 * $Id: m_sasl.c 1409 2006-05-21 14:46:17Z jilles $
43 #include "s_newconf.h"
46 static int m_authenticate(struct MsgBuf
*, struct Client
*, struct Client
*, int, const char **);
47 static int me_sasl(struct MsgBuf
*, struct Client
*, struct Client
*, int, const char **);
49 static void abort_sasl(struct Client
*);
50 static void abort_sasl_exit(hook_data_client_exit
*);
52 static void advertise_sasl(struct Client
*);
53 static void advertise_sasl_exit(hook_data_client_exit
*);
55 struct Message authenticate_msgtab
= {
56 "AUTHENTICATE", 0, 0, 0, 0,
57 {{m_authenticate
, 2}, {m_authenticate
, 2}, mg_ignore
, mg_ignore
, mg_ignore
, {m_authenticate
, 2}}
59 struct Message sasl_msgtab
= {
61 {mg_ignore
, mg_ignore
, mg_ignore
, mg_ignore
, {me_sasl
, 5}, mg_ignore
}
64 mapi_clist_av1 sasl_clist
[] = {
65 &authenticate_msgtab
, &sasl_msgtab
, NULL
67 mapi_hfn_list_av1 sasl_hfnlist
[] = {
68 { "new_local_user", (hookfn
) abort_sasl
},
69 { "client_exit", (hookfn
) abort_sasl_exit
},
70 { "new_remote_user", (hookfn
) advertise_sasl
},
71 { "client_exit", (hookfn
) advertise_sasl_exit
},
75 DECLARE_MODULE_AV1(sasl
, NULL
, NULL
, sasl_clist
, NULL
, sasl_hfnlist
, "$Revision: 1409 $");
78 m_authenticate(struct MsgBuf
*msgbuf_p
, struct Client
*client_p
, struct Client
*source_p
,
79 int parc
, const char *parv
[])
81 struct Client
*agent_p
= NULL
;
82 struct Client
*saslserv_p
= NULL
;
84 /* They really should use CAP for their own sake. */
85 if(!IsCapable(source_p
, CLICAP_SASL
))
88 if (strlen(client_p
->id
) == 3)
90 exit_client(client_p
, client_p
, client_p
, "Mixing client and server protocol");
94 saslserv_p
= find_named_client(ConfigFileEntry
.sasl_service
);
95 if (saslserv_p
== NULL
|| !IsService(saslserv_p
))
97 sendto_one(source_p
, form_str(ERR_SASLABORTED
), me
.name
, EmptyString(source_p
->name
) ? "*" : source_p
->name
);
101 if(source_p
->localClient
->sasl_complete
)
103 *source_p
->localClient
->sasl_agent
= '\0';
104 source_p
->localClient
->sasl_complete
= 0;
107 if(strlen(parv
[1]) > 400)
109 sendto_one(source_p
, form_str(ERR_SASLTOOLONG
), me
.name
, EmptyString(source_p
->name
) ? "*" : source_p
->name
);
115 /* Allocate a UID. */
116 strcpy(source_p
->id
, generate_uid());
117 add_to_id_hash(source_p
->id
, source_p
);
120 if(*source_p
->localClient
->sasl_agent
)
121 agent_p
= find_id(source_p
->localClient
->sasl_agent
);
125 sendto_one(saslserv_p
, ":%s ENCAP %s SASL %s %s H %s %s",
126 me
.id
, saslserv_p
->servptr
->name
, source_p
->id
, saslserv_p
->id
,
127 source_p
->host
, source_p
->sockhost
);
129 if (!strcmp(parv
[1], "EXTERNAL") && source_p
->certfp
!= NULL
)
130 sendto_one(saslserv_p
, ":%s ENCAP %s SASL %s %s S %s %s",
131 me
.id
, saslserv_p
->servptr
->name
, source_p
->id
, saslserv_p
->id
,
132 parv
[1], source_p
->certfp
);
134 sendto_one(saslserv_p
, ":%s ENCAP %s SASL %s %s S %s",
135 me
.id
, saslserv_p
->servptr
->name
, source_p
->id
, saslserv_p
->id
,
138 rb_strlcpy(source_p
->localClient
->sasl_agent
, saslserv_p
->id
, IDLEN
);
141 sendto_one(agent_p
, ":%s ENCAP %s SASL %s %s C %s",
142 me
.id
, agent_p
->servptr
->name
, source_p
->id
, agent_p
->id
,
144 source_p
->localClient
->sasl_out
++;
150 me_sasl(struct MsgBuf
*msgbuf_p
, struct Client
*client_p
, struct Client
*source_p
,
151 int parc
, const char *parv
[])
153 struct Client
*target_p
, *agent_p
;
155 /* Let propagate if not addressed to us, or if broadcast.
156 * Only SASL agents can answer global requests.
158 if(strncmp(parv
[2], me
.id
, 3))
161 if((target_p
= find_id(parv
[2])) == NULL
)
164 if((agent_p
= find_id(parv
[1])) == NULL
)
167 if(source_p
!= agent_p
->servptr
) /* WTF?! */
170 /* We only accept messages from SASL agents; these must have umode +S
171 * (so the server must be listed in a service{} block).
173 if(!IsService(agent_p
))
176 /* Reject if someone has already answered. */
177 if(*target_p
->localClient
->sasl_agent
&& strncmp(parv
[1], target_p
->localClient
->sasl_agent
, IDLEN
))
179 else if(!*target_p
->localClient
->sasl_agent
)
180 rb_strlcpy(target_p
->localClient
->sasl_agent
, parv
[1], IDLEN
);
183 sendto_one(target_p
, "AUTHENTICATE %s", parv
[4]);
184 else if(*parv
[3] == 'D')
187 sendto_one(target_p
, form_str(ERR_SASLFAIL
), me
.name
, EmptyString(target_p
->name
) ? "*" : target_p
->name
);
188 else if(*parv
[4] == 'S') {
189 sendto_one(target_p
, form_str(RPL_SASLSUCCESS
), me
.name
, EmptyString(target_p
->name
) ? "*" : target_p
->name
);
190 target_p
->localClient
->sasl_complete
= 1;
191 ServerStats
.is_ssuc
++;
193 *target_p
->localClient
->sasl_agent
= '\0'; /* Blank the stored agent so someone else can answer */
195 else if(*parv
[3] == 'M')
196 sendto_one(target_p
, form_str(RPL_SASLMECHS
), me
.name
, EmptyString(target_p
->name
) ? "*" : target_p
->name
, parv
[4]);
201 /* If the client never finished authenticating but is
202 * registering anyway, abort the exchange.
205 abort_sasl(struct Client
*data
)
207 if(data
->localClient
->sasl_out
== 0 || data
->localClient
->sasl_complete
)
210 data
->localClient
->sasl_out
= data
->localClient
->sasl_complete
= 0;
211 ServerStats
.is_sbad
++;
214 sendto_one(data
, form_str(ERR_SASLABORTED
), me
.name
, EmptyString(data
->name
) ? "*" : data
->name
);
216 if(*data
->localClient
->sasl_agent
)
218 struct Client
*agent_p
= find_id(data
->localClient
->sasl_agent
);
221 sendto_one(agent_p
, ":%s ENCAP %s SASL %s %s D A", me
.id
, agent_p
->servptr
->name
,
222 data
->id
, agent_p
->id
);
227 sendto_server(NULL
, NULL
, CAP_TS6
|CAP_ENCAP
, NOCAPS
, ":%s ENCAP * SASL %s * D A", me
.id
,
232 abort_sasl_exit(hook_data_client_exit
*data
)
234 if (data
->target
->localClient
)
235 abort_sasl(data
->target
);
239 advertise_sasl(struct Client
*client_p
)
241 if (!ConfigFileEntry
.sasl_service
)
244 if (irccmp(client_p
->name
, ConfigFileEntry
.sasl_service
))
247 sendto_local_clients_with_capability(CLICAP_CAP_NOTIFY
, ":%s CAP * NEW :sasl", me
.name
);
251 advertise_sasl_exit(hook_data_client_exit
*data
)
253 if (!ConfigFileEntry
.sasl_service
)
256 if (irccmp(data
->target
->name
, ConfigFileEntry
.sasl_service
))
259 sendto_local_clients_with_capability(CLICAP_CAP_NOTIFY
, ":%s CAP * DEL :sasl", me
.name
);