]> jfr.im git - solanum.git/blame - modules/m_sasl.c
Migrate remaining modules to AV2
[solanum.git] / modules / m_sasl.c
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1/* modules/m_sasl.c
2 * Copyright (C) 2006 Michael Tharp <gxti@partiallystapled.com>
f62f94b0 3 * Copyright (C) 2006 charybdis development team
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4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
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.
16 *
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.
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28 */
29
30#include "stdinc.h"
31
32#include "client.h"
33#include "hash.h"
34#include "send.h"
35#include "msg.h"
36#include "modules.h"
37#include "numeric.h"
38#include "s_serv.h"
39#include "s_stats.h"
40#include "string.h"
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41#include "s_newconf.h"
42#include "s_conf.h"
212380e3 43
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44static int m_authenticate(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
45static int me_sasl(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
da3e5fcb 46static int me_mechlist(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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47
48static void abort_sasl(struct Client *);
49static void abort_sasl_exit(hook_data_client_exit *);
50
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51static void advertise_sasl(struct Client *);
52static void advertise_sasl_exit(hook_data_client_exit *);
53
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54static unsigned int CLICAP_SASL = 0;
55static char mechlist_buf[BUFSIZE];
193d4db3 56
212380e3 57struct Message authenticate_msgtab = {
7baa37a9 58 "AUTHENTICATE", 0, 0, 0, 0,
ef3ab8e3 59 {{m_authenticate, 2}, {m_authenticate, 2}, mg_ignore, mg_ignore, mg_ignore, {m_authenticate, 2}}
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60};
61struct Message sasl_msgtab = {
7baa37a9 62 "SASL", 0, 0, 0, 0,
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63 {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_sasl, 5}, mg_ignore}
64};
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65struct Message mechlist_msgtab = {
66 "MECHLIST", 0, 0, 0, 0,
67 {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_mechlist, 2}, mg_ignore}
68};
212380e3 69
55abcbb2 70mapi_clist_av1 sasl_clist[] = {
da3e5fcb 71 &authenticate_msgtab, &sasl_msgtab, &mechlist_msgtab, NULL
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72};
73mapi_hfn_list_av1 sasl_hfnlist[] = {
74 { "new_local_user", (hookfn) abort_sasl },
75 { "client_exit", (hookfn) abort_sasl_exit },
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76 { "new_remote_user", (hookfn) advertise_sasl },
77 { "client_exit", (hookfn) advertise_sasl_exit },
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78 { NULL, NULL }
79};
80
193d4db3 81static int
38ffccf8 82sasl_visible(struct Client *client_p)
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83{
84 struct Client *agent_p = NULL;
85
86 if (ConfigFileEntry.sasl_service)
87 agent_p = find_named_client(ConfigFileEntry.sasl_service);
88
89 return agent_p != NULL && IsService(agent_p);
90}
91
da3e5fcb 92static const char *
38ffccf8 93sasl_data(struct Client *client_p)
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94{
95 return *mechlist_buf != 0 ? mechlist_buf : NULL;
96}
97
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98static struct ClientCapability capdata_sasl = {
99 .visible = sasl_visible,
da3e5fcb 100 .data = sasl_data,
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101 .flags = CLICAP_FLAGS_STICKY,
102};
103
104static int
105_modinit(void)
106{
da3e5fcb 107 memset(mechlist_buf, 0, sizeof mechlist_buf);
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108 CLICAP_SASL = capability_put(cli_capindex, "sasl", &capdata_sasl);
109 return 0;
110}
111
112static void
113_moddeinit(void)
114{
115 capability_orphan(cli_capindex, "sasl");
116}
117
105a4985 118DECLARE_MODULE_AV2(sasl, _modinit, _moddeinit, sasl_clist, NULL, sasl_hfnlist, NULL, NULL, NULL);
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119
120static int
428ca87b 121m_authenticate(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
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122 int parc, const char *parv[])
123{
124 struct Client *agent_p = NULL;
7d33cce8 125 struct Client *saslserv_p = NULL;
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126
127 /* They really should use CAP for their own sake. */
128 if(!IsCapable(source_p, CLICAP_SASL))
129 return 0;
130
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131 if (strlen(client_p->id) == 3)
132 {
133 exit_client(client_p, client_p, client_p, "Mixing client and server protocol");
134 return 0;
135 }
136
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137 saslserv_p = find_named_client(ConfigFileEntry.sasl_service);
138 if (saslserv_p == NULL || !IsService(saslserv_p))
139 {
140 sendto_one(source_p, form_str(ERR_SASLABORTED), me.name, EmptyString(source_p->name) ? "*" : source_p->name);
141 return 0;
142 }
143
c6bc97fd 144 if(source_p->localClient->sasl_complete)
212380e3 145 {
51535fcb 146 *source_p->localClient->sasl_agent = '\0';
c6bc97fd 147 source_p->localClient->sasl_complete = 0;
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148 }
149
150 if(strlen(parv[1]) > 400)
151 {
152 sendto_one(source_p, form_str(ERR_SASLTOOLONG), me.name, EmptyString(source_p->name) ? "*" : source_p->name);
153 return 0;
154 }
155
156 if(!*source_p->id)
157 {
158 /* Allocate a UID. */
159 strcpy(source_p->id, generate_uid());
160 add_to_id_hash(source_p->id, source_p);
161 }
162
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163 if(*source_p->localClient->sasl_agent)
164 agent_p = find_id(source_p->localClient->sasl_agent);
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165
166 if(agent_p == NULL)
572488e0 167 {
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168 sendto_one(saslserv_p, ":%s ENCAP %s SASL %s %s H %s %s",
169 me.id, saslserv_p->servptr->name, source_p->id, saslserv_p->id,
170 source_p->host, source_p->sockhost);
a3fa9d81 171
802710b5 172 if (source_p->certfp != NULL)
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173 sendto_one(saslserv_p, ":%s ENCAP %s SASL %s %s S %s %s",
174 me.id, saslserv_p->servptr->name, source_p->id, saslserv_p->id,
175 parv[1], source_p->certfp);
572488e0 176 else
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177 sendto_one(saslserv_p, ":%s ENCAP %s SASL %s %s S %s",
178 me.id, saslserv_p->servptr->name, source_p->id, saslserv_p->id,
179 parv[1]);
7d33cce8 180
c6bc97fd 181 rb_strlcpy(source_p->localClient->sasl_agent, saslserv_p->id, IDLEN);
572488e0 182 }
212380e3 183 else
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184 sendto_one(agent_p, ":%s ENCAP %s SASL %s %s C %s",
185 me.id, agent_p->servptr->name, source_p->id, agent_p->id,
7d33cce8 186 parv[1]);
c6bc97fd 187 source_p->localClient->sasl_out++;
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188
189 return 0;
190}
191
192static int
428ca87b 193me_sasl(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
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194 int parc, const char *parv[])
195{
196 struct Client *target_p, *agent_p;
197
198 /* Let propagate if not addressed to us, or if broadcast.
199 * Only SASL agents can answer global requests.
200 */
201 if(strncmp(parv[2], me.id, 3))
202 return 0;
203
204 if((target_p = find_id(parv[2])) == NULL)
205 return 0;
206
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207 if((agent_p = find_id(parv[1])) == NULL)
208 return 0;
209
210 if(source_p != agent_p->servptr) /* WTF?! */
211 return 0;
212
213 /* We only accept messages from SASL agents; these must have umode +S
214 * (so the server must be listed in a service{} block).
215 */
216 if(!IsService(agent_p))
217 return 0;
218
219 /* Reject if someone has already answered. */
c6bc97fd 220 if(*target_p->localClient->sasl_agent && strncmp(parv[1], target_p->localClient->sasl_agent, IDLEN))
212380e3 221 return 0;
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222 else if(!*target_p->localClient->sasl_agent)
223 rb_strlcpy(target_p->localClient->sasl_agent, parv[1], IDLEN);
212380e3 224
f62f94b0 225 if(*parv[3] == 'C')
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226 sendto_one(target_p, "AUTHENTICATE %s", parv[4]);
227 else if(*parv[3] == 'D')
228 {
229 if(*parv[4] == 'F')
230 sendto_one(target_p, form_str(ERR_SASLFAIL), me.name, EmptyString(target_p->name) ? "*" : target_p->name);
231 else if(*parv[4] == 'S') {
232 sendto_one(target_p, form_str(RPL_SASLSUCCESS), me.name, EmptyString(target_p->name) ? "*" : target_p->name);
c6bc97fd 233 target_p->localClient->sasl_complete = 1;
47adde3d 234 ServerStats.is_ssuc++;
212380e3 235 }
c6bc97fd 236 *target_p->localClient->sasl_agent = '\0'; /* Blank the stored agent so someone else can answer */
212380e3 237 }
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238 else if(*parv[3] == 'M')
239 sendto_one(target_p, form_str(RPL_SASLMECHS), me.name, EmptyString(target_p->name) ? "*" : target_p->name, parv[4]);
55abcbb2 240
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241 return 0;
242}
243
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244static int
245me_mechlist(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
246 int parc, const char *parv[])
247{
248 rb_strlcpy(mechlist_buf, parv[1], sizeof mechlist_buf);
249
250 return 0;
251}
252
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253/* If the client never finished authenticating but is
254 * registering anyway, abort the exchange.
255 */
256static void
257abort_sasl(struct Client *data)
258{
c6bc97fd 259 if(data->localClient->sasl_out == 0 || data->localClient->sasl_complete)
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260 return;
261
c6bc97fd 262 data->localClient->sasl_out = data->localClient->sasl_complete = 0;
47adde3d 263 ServerStats.is_sbad++;
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264
265 if(!IsClosing(data))
266 sendto_one(data, form_str(ERR_SASLABORTED), me.name, EmptyString(data->name) ? "*" : data->name);
267
c6bc97fd 268 if(*data->localClient->sasl_agent)
212380e3 269 {
c6bc97fd 270 struct Client *agent_p = find_id(data->localClient->sasl_agent);
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271 if(agent_p)
272 {
273 sendto_one(agent_p, ":%s ENCAP %s SASL %s %s D A", me.id, agent_p->servptr->name,
274 data->id, agent_p->id);
275 return;
276 }
277 }
278
279 sendto_server(NULL, NULL, CAP_TS6|CAP_ENCAP, NOCAPS, ":%s ENCAP * SASL %s * D A", me.id,
280 data->id);
281}
282
283static void
284abort_sasl_exit(hook_data_client_exit *data)
285{
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286 if (data->target->localClient)
287 abort_sasl(data->target);
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288}
289
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290static void
291advertise_sasl(struct Client *client_p)
292{
293 if (!ConfigFileEntry.sasl_service)
294 return;
295
296 if (irccmp(client_p->name, ConfigFileEntry.sasl_service))
297 return;
298
299 sendto_local_clients_with_capability(CLICAP_CAP_NOTIFY, ":%s CAP * NEW :sasl", me.name);
300}
301
302static void
303advertise_sasl_exit(hook_data_client_exit *data)
304{
305 if (!ConfigFileEntry.sasl_service)
306 return;
307
308 if (irccmp(data->target->name, ConfigFileEntry.sasl_service))
309 return;
310
311 sendto_local_clients_with_capability(CLICAP_CAP_NOTIFY, ":%s CAP * DEL :sasl", me.name);
312}