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OTR support
author Frank Zschockelt <mcabber_otr[at]freakysoft.de>
date Thu, 30 Aug 2007 00:52:51 +0200
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children 37b41ed9ed35
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1298:af035a304bec 1299:3b338a5c01fc
1 /*
2 * otr.c -- Off-The-Record Messaging for mcabber
3 *
4 * Copyright (C) 2007 Frank Zschockelt <mcabber_otr@freakysoft.de>
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 (at
9 * your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * 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 #include <config.h>
23
24 #ifdef HAVE_LIBOTR
25
26 #include "otr.h"
27 #include "logprint.h"
28 #include "hbuf.h"
29 #include "jab_priv.h"
30 #include "roster.h"
31 #include "utils.h"
32
33
34 static OtrlUserState userstate = NULL;
35 static char * account = NULL;
36 static char * keyfile = NULL;
37 static char * fprfile = NULL;
38 static enum otr_policy policy = manual;
39
40
41 static OtrlPolicy cb_policy (void *opdata, ConnContext *ctx);
42 static void cb_create_privkey (void *opdata,
43 const char *accountname,
44 const char *protocol);
45 static int cb_is_logged_in (void *opdata,
46 const char *accountname,
47 const char *protocol,
48 const char *recipient);
49 static void cb_inject_message (void *opdata,
50 const char *accountname,
51 const char *protocol,
52 const char *recipient,
53 const char *message);
54 static void cb_notify (void *opdata,
55 OtrlNotifyLevel level,
56 const char *accountname,
57 const char *protocol,
58 const char *username,
59 const char *title,
60 const char *primary,
61 const char *secondary);
62 static int cb_display_otr_message(void *opdata,
63 const char *accountname,
64 const char *protocol,
65 const char *username,
66 const char *msg);
67 static void cb_update_context_list(void *opdata);
68 static const char *cb_protocol_name (void *opdata, const char *protocol);
69 static void cb_protocol_name_free (void *opdata,
70 const char *protocol_name);
71 static void cb_new_fingerprint (void *opdata, OtrlUserState us,
72 const char *accountname,
73 const char *protocol,
74 const char *username,
75 unsigned char fingerprint[20]);
76 static void cb_write_fingerprints (void *opdata);
77 static void cb_gone_secure (void *opdata, ConnContext *context);
78 static void cb_gone_insecure (void *opdata, ConnContext *context);
79 static void cb_still_secure (void *opdata, ConnContext *context,
80 int is_reply);
81 static void cb_log_message (void *opdata, const char *message);
82 static int cb_max_message_size (void *opdata, ConnContext *context);
83
84 static OtrlMessageAppOps ops =
85 {
86 policy: cb_policy,
87 create_privkey: cb_create_privkey,
88 is_logged_in: cb_is_logged_in,
89 inject_message: cb_inject_message,
90 notify: cb_notify,
91 display_otr_message: cb_display_otr_message,
92 update_context_list: cb_update_context_list,
93 protocol_name: cb_protocol_name,
94 protocol_name_free: cb_protocol_name_free,
95 new_fingerprint: cb_new_fingerprint,
96 write_fingerprints: cb_write_fingerprints,
97 gone_secure: cb_gone_secure,
98 gone_insecure: cb_gone_insecure,
99 still_secure: cb_still_secure,
100 log_message: cb_log_message,
101 max_message_size: cb_max_message_size
102 };
103
104 static void otr_message_disconnect(ConnContext *ctx);
105 static ConnContext * otr_get_context(const char *buddy);
106 static void otr_startstop(const char * buddy, int start);
107 static void otr_handle_smp_tlvs(OtrlTLV * tlvs, ConnContext * ctx);
108
109
110 int otr_init(const char *jid)
111 {
112 char * root = expand_filename("~/.mcabber/otr/");
113 account = jidtodisp(jid);
114 keyfile = g_strdup_printf("%s%s.key", root, account);
115 fprfile = g_strdup_printf("%s%s.fpr", root, account);
116 g_free(root);
117
118 OTRL_INIT;
119
120 userstate = otrl_userstate_create ();
121 if (otrl_privkey_read(userstate, keyfile)){
122 scr_LogPrint(LPRINT_LOGNORM, "Could not read OTR key from %s", keyfile);
123 cb_create_privkey(NULL, account, "jabber");
124 }
125 if (otrl_privkey_read_fingerprints(userstate, fprfile, NULL, NULL)){
126 scr_LogPrint(LPRINT_LOGNORM, "Could not read OTR fingerprints from %s",
127 fprfile);
128 }
129 }
130
131 void otr_terminate(void)
132 {
133 ConnContext * ctx;
134
135 for(ctx = userstate->context_root; ctx; ctx = ctx->next)
136 if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED)
137 otr_message_disconnect(ctx);
138
139 g_free(account);
140 account = NULL;
141 otrl_userstate_free(userstate);
142 userstate = NULL;
143 g_free(keyfile);
144 keyfile = NULL;
145 }
146
147 static ConnContext * otr_get_context(const char *buddy)
148 {
149 int null = 0;
150 return otrl_context_find(userstate, buddy, account, "jabber", 1, &null,
151 NULL, NULL);
152 }
153
154 static void otr_message_disconnect(ConnContext *ctx)
155 {
156 if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED)
157 cb_gone_insecure(NULL, ctx);
158 otrl_message_disconnect(userstate, &ops, NULL, ctx->accountname,
159 ctx->protocol, ctx->username);
160 }
161
162 static void otr_startstop(const char * buddy, int start)
163 {
164 char * msg = NULL;
165 ConnContext *ctx = otr_get_context(buddy);
166
167 if (!userstate || !ctx)
168 return;
169
170 if (start && ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED)
171 otr_message_disconnect(ctx);
172
173 if (start) {
174 OtrlPolicy policy = cb_policy(NULL, ctx);
175 msg = otrl_proto_default_query_msg(ctx->accountname, policy);
176 cb_inject_message(NULL, ctx->accountname, ctx->protocol, ctx->username,
177 msg);
178 free (msg);
179 }
180 else
181 otr_message_disconnect(ctx);
182 }
183
184 void otr_establish(const char *buddy)
185 {
186 otr_startstop(buddy, 1);
187 }
188
189 void otr_disconnect(const char * buddy)
190 {
191 otr_startstop(buddy, 0);
192 }
193
194 void otr_fingerprint(const char * buddy, const char * trust)
195 {
196 char fpr[45], *tr;
197 ConnContext *ctx = otr_get_context(buddy);
198 if (!userstate || !ctx)
199 return;
200
201 if (!ctx->active_fingerprint || !ctx->active_fingerprint->fingerprint) {
202 scr_LogPrint(LPRINT_LOGNORM,
203 "No active fingerprint - start OTR for this buddy first.");
204 return;
205 }
206
207 otrl_privkey_hash_to_human(fpr, ctx->active_fingerprint->fingerprint);
208 if (trust) {
209 if (strcmp(fpr, trust) == 0)
210 otrl_context_set_trust(ctx->active_fingerprint, "trust");
211 else
212 otrl_context_set_trust(ctx->active_fingerprint, NULL);
213 }
214
215 tr = ctx->active_fingerprint->trust;
216 scr_LogPrint(LPRINT_LOGNORM, "%s [%44s]: %s", ctx->username, fpr,
217 tr && *tr ? "trusted" : "untrusted");
218 cb_write_fingerprints(NULL);
219 }
220
221 static void otr_handle_smp_tlvs(OtrlTLV * tlvs, ConnContext * ctx)
222 {
223 OtrlTLV *tlv = NULL;
224 char *sbuf = NULL;
225 NextExpectedSMP nextMsg = ctx->smstate->nextExpected;
226
227 tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP1);
228 if (tlv) {
229 if (nextMsg != OTRL_SMP_EXPECT1)
230 otr_smp_abort(ctx->username);
231 else {
232 sbuf = g_strdup_printf("OTR: Received SMP Initiation. "
233 "Answer with /otr smpr %s $secret",
234 ctx->username);
235 }
236 }
237 tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP2);
238 if (tlv) {
239 if (nextMsg != OTRL_SMP_EXPECT2)
240 otr_smp_abort(ctx->username);
241 else {
242 sbuf = g_strdup("OTR: Received SMP Response.");
243 /* If we received TLV2, we will send TLV3 and expect TLV4 */
244 ctx->smstate->nextExpected = OTRL_SMP_EXPECT4;
245 }
246 }
247 tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP3);
248 if (tlv) {
249 if (nextMsg != OTRL_SMP_EXPECT3)
250 otr_smp_abort(ctx->username);
251 else {
252 /* If we received TLV3, we will send TLV4
253 * We will not expect more messages, so prepare for next SMP */
254 ctx->smstate->nextExpected = OTRL_SMP_EXPECT1;
255 /* Report result to user */
256 if (ctx->active_fingerprint && ctx->active_fingerprint->trust &&
257 *ctx->active_fingerprint->trust != '\0')
258 sbuf = g_strdup("OTR: SMP succeeded");
259 else
260 sbuf = g_strdup("OTR: SMP failed");
261 }
262 }
263 tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP4);
264 if (tlv) {
265 if (nextMsg != OTRL_SMP_EXPECT4)
266 otr_smp_abort(ctx->username);
267 else {
268 /* We will not expect more messages, so prepare for next SMP */
269 ctx->smstate->nextExpected = OTRL_SMP_EXPECT1;
270 /* Report result to user */
271 if (ctx->active_fingerprint && ctx->active_fingerprint->trust &&
272 *ctx->active_fingerprint->trust != '\0')
273 sbuf = g_strdup("OTR: SMP succeeded");
274 else
275 sbuf = g_strdup("OTR: SMP failed");
276 }
277 }
278 tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP_ABORT);
279 if (tlv) {
280 /* The message we are waiting for will not arrive, so reset
281 * and prepare for the next SMP */
282 sbuf = g_strdup("OTR: SMP aborted by your buddy");
283 ctx->smstate->nextExpected = OTRL_SMP_EXPECT1;
284 }
285
286 if (sbuf) {
287 scr_WriteIncomingMessage(ctx->username, sbuf, 0, HBB_PREFIX_INFO);
288 g_free(sbuf);
289 }
290 }
291
292 /*
293 * returns whether a otr_message was received
294 * sets *otr_data to NULL, when it was an internal otr message
295 */
296 int otr_receive(char **otr_data, const char * buddy, int * free_msg)
297 {
298 int ignore_message;
299 char *newmessage = NULL;
300 OtrlTLV *tlvs = NULL;
301 OtrlTLV *tlv = NULL;
302 ConnContext * ctx;
303
304 *free_msg = 0;
305 ignore_message = otrl_message_receiving(userstate, &ops, NULL, account,
306 "jabber", buddy, *otr_data, &newmessage, &tlvs, NULL, NULL);
307
308 ctx = otr_get_context(buddy);
309
310 tlv = otrl_tlv_find(tlvs, OTRL_TLV_DISCONNECTED);
311 if (tlv) {
312 /* Notify the user that the other side disconnected. */
313 if (ctx) {
314 cb_gone_insecure(NULL, ctx);
315 otr_disconnect(buddy);
316 }
317 }
318
319 otr_handle_smp_tlvs(tlvs, ctx);
320
321 if (tlvs != NULL)
322 otrl_tlv_free(tlvs);
323
324 if (ignore_message)
325 *otr_data = NULL;
326
327 if (!ignore_message && newmessage) {
328 *free_msg = 1;
329 *otr_data = g_strdup(newmessage);
330 otrl_message_free(newmessage);
331 if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED)
332 return 1;
333 }
334 return 0;
335 }
336
337 int otr_send(char **msg, const char *buddy)
338 {
339 gcry_error_t err;
340 char *newmessage = NULL;
341 ConnContext * ctx = otr_get_context(buddy);
342
343 err = otrl_message_sending(userstate, &ops, NULL, account, "jabber", buddy,
344 *msg, NULL, &newmessage, NULL, NULL);
345
346 if (err)
347 *msg = NULL; /*something went wrong, don't send the plain-message! */
348
349 if (!err && newmessage) {
350 *msg = g_strdup(newmessage);
351 otrl_message_free(newmessage);
352 if (cb_policy(NULL, ctx) & OTRL_POLICY_REQUIRE_ENCRYPTION ||
353 ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED)
354 return 1;
355 }
356 return 0;
357 }
358
359 /* Prints OTR connection state */
360 void otr_print_info(const char * buddy)
361 {
362 const char *state, *auth, *policy;
363 ConnContext * ctx = otr_get_context(buddy);
364 OtrlPolicy p = cb_policy (ctx->app_data, ctx);
365
366 if (!userstate || !ctx)
367 return;
368
369 switch (ctx->msgstate) {
370 case OTRL_MSGSTATE_PLAINTEXT: state = "plaintext"; break;
371 case OTRL_MSGSTATE_ENCRYPTED:
372 switch (ctx->protocol_version) {
373 case 1: state = "encrypted V1"; break;
374 case 2: state = "encrypted V2"; break;
375 default:state = "encrypted";
376 };
377 break;
378 case OTRL_MSGSTATE_FINISHED: state = "finished"; break;
379 default: state = "unknown state";
380 }
381 switch (ctx->auth.authstate) {
382 case OTRL_AUTHSTATE_NONE:
383 switch (ctx->otr_offer) {
384 case OFFER_NOT: auth = "no offer sent"; break;
385 case OFFER_SENT: auth = "offer sent"; break;
386 case OFFER_ACCEPTED: auth = "offer accepted"; break;
387 case OFFER_REJECTED: auth = "offer rejected"; break;
388 default: auth = "unknown auth";
389 }
390 break;
391 case OTRL_AUTHSTATE_AWAITING_DHKEY:
392 auth = "awaiting D-H key"; break;
393 case OTRL_AUTHSTATE_AWAITING_REVEALSIG:
394 auth = "awaiting reveal signature"; break;
395 case OTRL_AUTHSTATE_AWAITING_SIG:
396 auth = "awaiting signature"; break;
397 case OTRL_AUTHSTATE_V1_SETUP:
398 auth = "v1 setup"; break;
399 default:
400 auth = "unknown auth";
401 }
402 if (p == OTRL_POLICY_NEVER)
403 policy = "plain";
404 else if (p == OTRL_POLICY_OPPORTUNISTIC & ~OTRL_POLICY_ALLOW_V1)
405 policy = "opportunistic";
406 else if (p == OTRL_POLICY_MANUAL & ~OTRL_POLICY_ALLOW_V1)
407 policy = "manual";
408 else if (p == (OTRL_POLICY_ALWAYS & ~OTRL_POLICY_ALLOW_V1))
409 policy = "always";
410 else
411 policy = "unknown";
412
413 scr_LogPrint(LPRINT_LOGNORM, "%s: %s (%s) [%s]",
414 ctx->username, state, auth, policy);
415 }
416
417 static ConnContext * otr_context_encrypted(const char * buddy)
418 {
419 ConnContext * ctx = otr_get_context(buddy);
420
421 if (!userstate || !ctx || ctx->msgstate != OTRL_MSGSTATE_ENCRYPTED){
422 scr_LogPrint(LPRINT_LOGNORM,
423 "You have to start an OTR channel with %s before you can "
424 "use SMP.", buddy);
425 return NULL;
426 }
427
428 return ctx;
429 }
430
431 void otr_smp_query(const char * buddy, const char * secret)
432 {
433 ConnContext * ctx = otr_context_encrypted(buddy);
434
435 if (!secret) {
436 scr_LogPrint(LPRINT_LOGNORM,
437 "Using SMP without a secret isn't a good idea.");
438 return;
439 }
440
441 if (ctx) {
442 otrl_message_initiate_smp(userstate, &ops, NULL, ctx, secret,
443 strlen(secret));
444 scr_WriteIncomingMessage(ctx->username,
445 "OTR: Socialist Millionaires' Protocol "
446 "initiated.", 0, HBB_PREFIX_INFO);
447 }
448 }
449
450 void otr_smp_respond(const char * buddy, const char * secret)
451 {
452 ConnContext * ctx = otr_context_encrypted(buddy);
453
454 if (!secret) {
455 scr_LogPrint(LPRINT_LOGNORM,
456 "Using SMP without a secret isn't a good idea.");
457 return;
458 }
459
460 if (ctx) {
461 if (!ctx->smstate->secret) {
462 scr_LogPrint(LPRINT_LOGNORM,
463 "Don't call smpr before you haven't received an SMP "
464 "Initiation!");
465 return;
466 }
467 otrl_message_respond_smp(userstate, &ops, NULL, ctx, secret,
468 strlen(secret));
469 scr_WriteIncomingMessage(ctx->username,
470 "OTR: Socialist Millionaires' Protocol: "
471 "response sent", 0, HBB_PREFIX_INFO);
472 }
473 }
474
475 void otr_smp_abort(const char * buddy)
476 {
477 ConnContext * ctx = otr_context_encrypted(buddy);
478
479 if (ctx) {
480 otrl_message_abort_smp(userstate, &ops, NULL, ctx);
481 scr_WriteIncomingMessage(ctx->username,
482 "OTR: Socialist Millionaires' Protocol aborted.",
483 0, HBB_PREFIX_INFO);
484 }
485 }
486
487 void otr_key(void)
488 {
489 OtrlPrivKey * key;
490 char readable[45] = "";
491
492 if(!userstate)
493 return;
494 for (key = userstate->privkey_root; key; key = key->next) {
495 otrl_privkey_fingerprint(userstate, readable, key->accountname,
496 key->protocol);
497 scr_LogPrint(LPRINT_LOGNORM, "%s: %s", key->accountname, readable);
498 }
499 }
500
501 /* Return the OTR policy for the given context. */
502 static OtrlPolicy cb_policy(void *opdata, ConnContext *ctx)
503 {
504 enum otr_policy p = settings_otr_getpolicy(NULL);
505
506 if(ctx)
507 if(settings_otr_getpolicy(ctx->username))
508 p = settings_otr_getpolicy(ctx->username);
509
510 switch (p) {
511 case plain:
512 return OTRL_POLICY_NEVER;
513 case opportunistic:
514 return OTRL_POLICY_OPPORTUNISTIC & ~OTRL_POLICY_ALLOW_V1;
515 case manual:
516 return OTRL_POLICY_MANUAL & ~OTRL_POLICY_ALLOW_V1;
517 case always:
518 return OTRL_POLICY_ALWAYS & ~OTRL_POLICY_ALLOW_V1;
519 }
520 }
521
522 /* Create a private key for the given accountname/protocol if
523 * desired. */
524 static void cb_create_privkey(void *opdata, const char *accountname,
525 const char *protocol)
526 {
527 gcry_error_t e;
528
529 scr_LogPrint(LPRINT_LOGNORM,
530 "Generating new OTR key for %s. This may take a while...",
531 accountname);
532 scr_DoUpdate();
533
534 e = otrl_privkey_generate(userstate, keyfile, accountname, protocol);
535
536 if (e)
537 scr_LogPrint(LPRINT_LOGNORM, "OTR key generation failed!"
538 " Please mkdir ~/.mcabber/otr/ and restart mcabber.");
539 else
540 scr_LogPrint(LPRINT_LOGNORM, "OTR key generated.");
541 }
542
543 /* Report whether you think the given user is online. Return 1 if
544 * you think he is, 0 if you think he isn't, -1 if you're not sure.
545 * If you return 1, messages such as heartbeats or other
546 * notifications may be sent to the user, which could result in "not
547 * logged in" errors if you're wrong. */
548 static int cb_is_logged_in(void *opdata, const char *accountname,
549 const char *protocol, const char *recipient)
550 {
551 int ret = (roster_getstatus((char *)recipient, NULL) != offline);
552 return ret;
553 }
554
555 /* Send the given IM to the given recipient from the given
556 * accountname/protocol. */
557 static void cb_inject_message(void *opdata, const char *accountname,
558 const char *protocol, const char *recipient,
559 const char *message)
560 {
561 char * id = g_strdup("otrinject");
562 jb_send_msg(recipient, message, ROSTER_TYPE_USER, "", id, NULL);
563 g_free(id);
564 }
565
566 /* Display a notification message for a particular
567 * accountname / protocol / username conversation. */
568 static void cb_notify(void *opdata, OtrlNotifyLevel level,
569 const char *accountname, const char *protocol,
570 const char *username, const char *title,
571 const char *primary, const char *secondary)
572 {
573 char * type;
574 char *sbuf = NULL;
575 switch (level) {
576 case OTRL_NOTIFY_ERROR: type = "error"; break;
577 case OTRL_NOTIFY_WARNING: type = "warning"; break;
578 case OTRL_NOTIFY_INFO: type = "info"; break;
579 }
580 sbuf = g_strdup_printf("OTR %s:%s\n%s\n%s",type,title, primary, secondary);
581 scr_WriteIncomingMessage(username, sbuf, 0, HBB_PREFIX_INFO);
582 g_free(sbuf);
583 }
584
585 /* Display an OTR control message for a particular
586 * accountname / protocol / username conversation. Return 0 if you are able
587 * to successfully display it. If you return non-0 (or if this
588 * function is NULL), the control message will be displayed inline,
589 * as a received message, or else by using the above notify()
590 * callback. */
591 static int cb_display_otr_message(void *opdata, const char *accountname,
592 const char *protocol, const char *username,
593 const char *msg)
594 {
595 scr_WriteIncomingMessage(username, msg, 0, HBB_PREFIX_INFO);
596 return 0;
597 }
598
599 /* When the list of ConnContexts changes (including a change in
600 * state), this is called so the UI can be updated. */
601 static void cb_update_context_list(void *opdata)
602 {
603 /*maybe introduce new status characters for mcabber,
604 * then use this function (?!)*/
605 }
606
607 /* Return a newly allocated string containing a human-friendly name
608 * for the given protocol id */
609 static const char *cb_protocol_name(void *opdata, const char *protocol)
610 {
611 return protocol;
612 }
613
614 /* Deallocate a string allocated by protocol_name */
615 static void cb_protocol_name_free (void *opdata, const char *protocol_name)
616 {
617 /* We didn't allocated memory, so we don't have to free anything :p */
618 }
619
620 /* A new fingerprint for the given user has been received. */
621 static void cb_new_fingerprint(void *opdata, OtrlUserState us,
622 const char *accountname, const char *protocol,
623 const char *username,
624 unsigned char fingerprint[20])
625 {
626 char *sbuf = NULL;
627 char readable[45];
628
629 otrl_privkey_hash_to_human(readable, fingerprint);
630 sbuf = g_strdup_printf("OTR: new fingerprint: %s", readable);
631 scr_WriteIncomingMessage(username, sbuf, 0, HBB_PREFIX_INFO);
632 g_free(sbuf);
633 }
634
635 /* The list of known fingerprints has changed. Write them to disk. */
636 static void cb_write_fingerprints(void *opdata)
637 {
638 otrl_privkey_write_fingerprints(userstate, fprfile);
639 }
640
641 /* A ConnContext has entered a secure state. */
642 static void cb_gone_secure(void *opdata, ConnContext *context)
643 {
644 scr_WriteIncomingMessage(context->username, "OTR: channel established", 0,
645 HBB_PREFIX_INFO);
646 }
647
648 /* A ConnContext has left a secure state. */
649 static void cb_gone_insecure(void *opdata, ConnContext *context)
650 {
651 scr_WriteIncomingMessage(context->username, "OTR: channel closed", 0,
652 HBB_PREFIX_INFO);
653 }
654
655 /* We have completed an authentication, using the D-H keys we
656 * already knew. is_reply indicates whether we initiated the AKE. */
657 static void cb_still_secure(void *opdata, ConnContext *context, int is_reply)
658 {
659 scr_WriteIncomingMessage(context->username, "OTR: channel reestablished", 0,
660 HBB_PREFIX_INFO);
661 }
662
663 /* Log a message. The passed message will end in "\n". */
664 static void cb_log_message(void *opdata, const char *message)
665 {
666 scr_LogPrint(LPRINT_DEBUG, "OTR: %s", message);
667 }
668
669 /* Find the maximum message size supported by this protocol. */
670 static int cb_max_message_size(void *opdata, ConnContext *context)
671 {
672 return 8192;
673 }
674
675 #endif /* HAVE_LIBOTR */
676 /* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */