5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 2000 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 #include "clientincludes.h"
23 /* Prints a message with three star (*) sign before the actual message
24 on the current output window. This is used to print command outputs
25 and error messages. */
27 void silc_say(SilcClient client, SilcClientConnection conn,
32 SilcClientInternal app = (SilcClientInternal)client->application;
34 memset(message, 0, sizeof(message));
35 strncat(message, "\n*** ", 5);
38 vsprintf(message + 5, msg, vp);
41 /* Print the message */
42 silc_print_to_window(app->screen->output_win[0], message);
45 /* Message for a channel. The `sender' is the nickname of the sender
46 received in the packet. The `channel_name' is the name of the channel. */
48 void silc_channel_message(SilcClient client, SilcClientConnection conn,
49 SilcClientEntry sender, SilcChannelEntry channel
52 /* Message from client */
53 if (conn && !strcmp(conn->current_channel->channel_name,
54 channel->channel_name))
55 silc_print(client, "<%s> %s", sender ? sender->nickname : "[<unknown>]",
58 silc_print(client, "<%s:%s> %s", sender ? sender->nickname : "[<unknown>]",
59 channel->channel_name, msg);
62 /* Private message to the client. The `sender' is the nickname of the
63 sender received in the packet. */
65 void silc_private_message(SilcClient client, SilcClientConnection conn,
66 SilcClientEntry sender, char *msg)
68 silc_print(client, "*%s* %s", sender->nickname, msg);
72 /* Notify message to the client. The notify arguments are sent in the
73 same order as servers sends them. The arguments are same as received
74 from the server except for ID's. If ID is received application receives
75 the corresponding entry to the ID. For example, if Client ID is received
76 application receives SilcClientEntry. Also, if the notify type is
77 for channel the channel entry is sent to application (even if server
80 void silc_notify(SilcClient client, SilcClientConnection conn,
81 SilcNotifyType type, ...)
83 SilcClientInternal app = (SilcClientInternal)client->application;
86 SilcClientEntry client_entry, client_entry2;
87 SilcChannelEntry channel_entry;
93 memset(message, 0, sizeof(message));
95 /* Get arguments (defined by protocol in silc-pp-01 -draft) */
97 case SILC_NOTIFY_TYPE_NONE:
98 tmp = va_arg(vp, char *);
101 strcpy(message, tmp);
104 case SILC_NOTIFY_TYPE_INVITE:
105 client_entry = va_arg(vp, SilcClientEntry);
106 channel_entry = va_arg(vp, SilcChannelEntry);
107 snprintf(message, sizeof(message), "%s invites you to channel %s",
108 client_entry->nickname, channel_entry->channel_name);
111 case SILC_NOTIFY_TYPE_JOIN:
112 client_entry = va_arg(vp, SilcClientEntry);
113 channel_entry = va_arg(vp, SilcChannelEntry);
114 snprintf(message, sizeof(message), "%s (%s) has joined channel %s",
115 client_entry->nickname, client_entry->username,
116 channel_entry->channel_name);
117 if (client_entry == conn->local_entry) {
120 silc_list_start(channel_entry->clients);
121 while ((chu = silc_list_get(channel_entry->clients)) != SILC_LIST_END) {
122 if (chu->client == client_entry) {
123 if (app->screen->bottom_line->mode)
124 silc_free(app->screen->bottom_line->mode);
125 app->screen->bottom_line->mode = silc_client_chumode_char(chu->mode);
126 silc_screen_print_bottom_line(app->screen, 0);
133 case SILC_NOTIFY_TYPE_LEAVE:
134 client_entry = va_arg(vp, SilcClientEntry);
135 channel_entry = va_arg(vp, SilcChannelEntry);
136 if (client_entry->server)
137 snprintf(message, sizeof(message), "%s@%s has left channel %s",
138 client_entry->nickname, client_entry->server,
139 channel_entry->channel_name);
141 snprintf(message, sizeof(message), "%s has left channel %s",
142 client_entry->nickname, channel_entry->channel_name);
145 case SILC_NOTIFY_TYPE_SIGNOFF:
146 client_entry = va_arg(vp, SilcClientEntry);
147 tmp = va_arg(vp, char *);
148 if (client_entry->server)
149 snprintf(message, sizeof(message), "Signoff: %s@%s %s%s%s",
150 client_entry->nickname, client_entry->server,
151 tmp ? "(" : "", tmp ? tmp : "", tmp ? ")" : "");
153 snprintf(message, sizeof(message), "Signoff: %s %s%s%s",
154 client_entry->nickname,
155 tmp ? "(" : "", tmp ? tmp : "", tmp ? ")" : "");
158 case SILC_NOTIFY_TYPE_TOPIC_SET:
159 client_entry = va_arg(vp, SilcClientEntry);
160 tmp = va_arg(vp, char *);
161 channel_entry = va_arg(vp, SilcChannelEntry);
162 if (client_entry->server)
163 snprintf(message, sizeof(message), "%s@%s set topic on %s: %s",
164 client_entry->nickname, client_entry->server,
165 channel_entry->channel_name, tmp);
167 snprintf(message, sizeof(message), "%s set topic on %s: %s",
168 client_entry->nickname, channel_entry->channel_name, tmp);
171 case SILC_NOTIFY_TYPE_NICK_CHANGE:
172 client_entry = va_arg(vp, SilcClientEntry);
173 client_entry2 = va_arg(vp, SilcClientEntry);
174 if (client_entry->server && client_entry2->server)
175 snprintf(message, sizeof(message), "%s@%s is known as %s@%s",
176 client_entry->nickname, client_entry->server,
177 client_entry2->nickname, client_entry2->server);
179 snprintf(message, sizeof(message), "%s is known as %s",
180 client_entry->nickname, client_entry2->nickname);
183 case SILC_NOTIFY_TYPE_CMODE_CHANGE:
184 client_entry = va_arg(vp, SilcClientEntry);
185 tmp = silc_client_chmode(va_arg(vp, unsigned int));
186 channel_entry = va_arg(vp, SilcChannelEntry);
188 snprintf(message, sizeof(message), "%s changed channel mode to +%s",
189 client_entry->nickname, tmp);
191 snprintf(message, sizeof(message), "%s removed all channel modes",
192 client_entry->nickname);
193 if (app->screen->bottom_line->channel_mode)
194 silc_free(app->screen->bottom_line->channel_mode);
195 app->screen->bottom_line->channel_mode = tmp;
196 silc_screen_print_bottom_line(app->screen, 0);
199 case SILC_NOTIFY_TYPE_CUMODE_CHANGE:
200 client_entry = va_arg(vp, SilcClientEntry);
201 tmp_int = va_arg(vp, unsigned int);
202 tmp = silc_client_chumode(tmp_int);
203 client_entry2 = va_arg(vp, SilcClientEntry);
204 channel_entry = va_arg(vp, SilcChannelEntry);
206 snprintf(message, sizeof(message), "%s changed %s's mode to +%s",
207 client_entry->nickname, client_entry2->nickname, tmp);
209 snprintf(message, sizeof(message), "%s removed %s's modes",
210 client_entry->nickname, client_entry2->nickname);
211 if (client_entry2 == conn->local_entry) {
212 if (app->screen->bottom_line->mode)
213 silc_free(app->screen->bottom_line->mode);
214 app->screen->bottom_line->mode = silc_client_chumode_char(tmp_int);
215 silc_screen_print_bottom_line(app->screen, 0);
220 case SILC_NOTIFY_TYPE_MOTD:
224 tmp = va_arg(vp, unsigned char *);
228 if (tmp[i++] == '\n') {
229 memset(line, 0, sizeof(line));
230 strncat(line, tmp, i - 1);
233 silc_say(client, conn, "%s", line);
243 case SILC_NOTIFY_TYPE_CHANNEL_CHANGE:
246 case SILC_NOTIFY_TYPE_KICKED:
247 client_entry = va_arg(vp, SilcClientEntry);
248 tmp = va_arg(vp, char *);
249 channel_entry = va_arg(vp, SilcChannelEntry);
251 if (client_entry == conn->local_entry) {
252 snprintf(message, sizeof(message),
253 "You have been kicked off channel %s %s%s%s",
254 conn->current_channel->channel_name,
255 tmp ? "(" : "", tmp ? tmp : "", tmp ? ")" : "");
257 snprintf(message, sizeof(message),
258 "%s%s%s has been kicked off channel %s %s%s%s",
259 client_entry->nickname,
260 client_entry->server ? "@" : "",
261 client_entry->server ? client_entry->server : "",
262 conn->current_channel->channel_name,
263 tmp ? "(" : "", tmp ? tmp : "", tmp ? ")" : "");
267 case SILC_NOTIFY_TYPE_KILLED:
268 client_entry = va_arg(vp, SilcClientEntry);
269 tmp = va_arg(vp, char *);
270 channel_entry = va_arg(vp, SilcChannelEntry);
272 if (client_entry == conn->local_entry) {
273 snprintf(message, sizeof(message),
274 "You have been killed from the SILC Network %s%s%s",
275 tmp ? "(" : "", tmp ? tmp : "", tmp ? ")" : "");
277 snprintf(message, sizeof(message),
278 "%s%s%s has been killed from the SILC Network %s%s%s",
279 client_entry->nickname,
280 client_entry->server ? "@" : "",
281 client_entry->server ? client_entry->server : "",
282 tmp ? "(" : "", tmp ? tmp : "", tmp ? ")" : "");
290 silc_print(client, "*** %s", message);
293 /* Command handler. This function is called always in the command function.
294 If error occurs it will be called as well. `conn' is the associated
295 client connection. `cmd_context' is the command context that was
296 originally sent to the command. `success' is FALSE if error occured
297 during command. `command' is the command being processed. It must be
298 noted that this is not reply from server. This is merely called just
299 after application has called the command. Just to tell application
300 that the command really was processed. */
302 void silc_command(SilcClient client, SilcClientConnection conn,
303 SilcClientCommandContext cmd_context, int success,
306 SilcClientInternal app = (SilcClientInternal)client->application;
314 case SILC_COMMAND_QUIT:
315 app->screen->bottom_line->channel = NULL;
316 silc_screen_print_bottom_line(app->screen, 0);
319 case SILC_COMMAND_LEAVE:
321 if (!strncmp(conn->current_channel->channel_name, name, strlen(name))) {
322 app->screen->bottom_line->channel = NULL;
323 silc_screen_print_bottom_line(app->screen, 0);
331 /* We've resolved all clients we don't know about, now just print the
332 users from the channel on the screen. */
334 void silc_client_show_users(SilcClient client,
335 SilcClientConnection conn,
336 SilcClientEntry *clients,
337 unsigned int clients_count,
340 SilcChannelEntry channel = (SilcChannelEntry)context;
342 int k = 0, len1 = 0, len2 = 0;
343 char *name_list = NULL;
348 silc_list_start(channel->clients);
349 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
350 char *m, *n = chu->client->nickname;
357 name_list = silc_realloc(name_list, sizeof(*name_list) * (len1 + 3));
359 m = silc_client_chumode_char(chu->mode);
361 memcpy(name_list + (len1 - len2), m, strlen(m));
366 memcpy(name_list + (len1 - len2), n, len2);
369 if (k == silc_list_count(channel->clients) - 1)
371 memcpy(name_list + len1, " ", 1);
376 client->ops->say(client, conn, "Users on %s: %s", channel->channel_name,
378 silc_free(name_list);
381 /* Command reply handler. This function is called always in the command reply
382 function. If error occurs it will be called as well. Normal scenario
383 is that it will be called after the received command data has been parsed
384 and processed. The function is used to pass the received command data to
387 `conn' is the associated client connection. `cmd_payload' is the command
388 payload data received from server and it can be ignored. It is provided
389 if the application would like to re-parse the received command data,
390 however, it must be noted that the data is parsed already by the library
391 thus the payload can be ignored. `success' is FALSE if error occured.
392 In this case arguments are not sent to the application. `command' is the
393 command reply being processed. The function has variable argument list
394 and each command defines the number and type of arguments it passes to the
395 application (on error they are not sent). */
397 void silc_command_reply(SilcClient client, SilcClientConnection conn,
398 SilcCommandPayload cmd_payload, int success,
399 SilcCommand command, SilcCommandStatus status, ...)
401 SilcClientInternal app = (SilcClientInternal)client->application;
405 va_start(vp, status);
409 case SILC_COMMAND_WHOIS:
411 char buf[1024], *nickname, *username, *realname;
413 unsigned int idle, mode;
415 if (status == SILC_STATUS_ERR_NO_SUCH_NICK) {
417 tmp = silc_argument_get_arg_type(silc_command_get_args(cmd_payload),
420 client->ops->say(client, conn, "%s: %s", tmp,
421 silc_client_command_status_message(status));
423 client->ops->say(client, conn, "%s",
424 silc_client_command_status_message(status));
431 (void)va_arg(vp, SilcClientEntry);
432 nickname = va_arg(vp, char *);
433 username = va_arg(vp, char *);
434 realname = va_arg(vp, char *);
435 (void)va_arg(vp, void *);
436 mode = va_arg(vp, unsigned int);
437 idle = va_arg(vp, unsigned int);
439 memset(buf, 0, sizeof(buf));
442 len = strlen(nickname);
443 strncat(buf, nickname, len);
444 strncat(buf, " is ", 4);
448 strncat(buf, username, strlen(username));
452 strncat(buf, " (", 2);
453 strncat(buf, realname, strlen(realname));
454 strncat(buf, ")", 1);
457 client->ops->say(client, conn, "%s", buf);
460 client->ops->say(client, conn, "%s is %s", nickname,
461 (mode & SILC_UMODE_SERVER_OPERATOR) ?
463 (mode & SILC_UMODE_ROUTER_OPERATOR) ?
464 "SILC Operator" : "[Unknown mode]");
466 if (idle && nickname)
467 client->ops->say(client, conn, "%s has been idle %d %s",
469 idle > 60 ? (idle / 60) : idle,
470 idle > 60 ? "minutes" : "seconds");
474 case SILC_COMMAND_WHOWAS:
476 char buf[1024], *nickname, *username, *realname;
479 if (status == SILC_STATUS_ERR_NO_SUCH_NICK) {
481 tmp = silc_argument_get_arg_type(silc_command_get_args(cmd_payload),
484 client->ops->say(client, conn, "%s: %s", tmp,
485 silc_client_command_status_message(status));
487 client->ops->say(client, conn, "%s",
488 silc_client_command_status_message(status));
495 (void)va_arg(vp, SilcClientEntry);
496 nickname = va_arg(vp, char *);
497 username = va_arg(vp, char *);
498 realname = va_arg(vp, char *);
500 memset(buf, 0, sizeof(buf));
503 len = strlen(nickname);
504 strncat(buf, nickname, len);
505 strncat(buf, " was ", 5);
509 strncat(buf, username, strlen(nickname));
513 strncat(buf, " (", 2);
514 strncat(buf, realname, strlen(realname));
515 strncat(buf, ")", 1);
518 client->ops->say(client, conn, "%s", buf);
522 case SILC_COMMAND_JOIN:
526 SilcBuffer client_id_list;
527 unsigned int list_count;
528 SilcChannelEntry channel;
533 app->screen->bottom_line->channel = va_arg(vp, char *);
534 channel = va_arg(vp, SilcChannelEntry);
535 mode = va_arg(vp, unsigned int);
536 (void)va_arg(vp, unsigned int);
537 (void)va_arg(vp, unsigned char *);
538 (void)va_arg(vp, unsigned char *);
539 (void)va_arg(vp, unsigned char *);
540 topic = va_arg(vp, char *);
541 (void)va_arg(vp, unsigned char *);
542 list_count = va_arg(vp, unsigned int);
543 client_id_list = va_arg(vp, SilcBuffer);
546 client->ops->say(client, conn, "Topic for %s: %s",
547 app->screen->bottom_line->channel, topic);
549 app->screen->bottom_line->channel_mode = silc_client_chmode(mode);
550 silc_screen_print_bottom_line(app->screen, 0);
552 /* Resolve the client information */
553 silc_client_get_clients_by_list(client, conn, list_count,
555 silc_client_show_users, channel);
559 case SILC_COMMAND_NICK:
561 SilcClientEntry entry;
566 entry = va_arg(vp, SilcClientEntry);
567 silc_say(client, conn, "Your current nickname is %s", entry->nickname);
568 app->screen->bottom_line->nickname = entry->nickname;
569 silc_screen_print_bottom_line(app->screen, 0);
573 case SILC_COMMAND_UMODE:
580 mode = va_arg(vp, unsigned int);
582 if (!mode && app->screen->bottom_line->umode) {
583 silc_free(app->screen->bottom_line->umode);
584 app->screen->bottom_line->umode = NULL;
587 if (mode & SILC_UMODE_SERVER_OPERATOR) {
588 if (app->screen->bottom_line->umode)
589 silc_free(app->screen->bottom_line->umode);
590 app->screen->bottom_line->umode = strdup("Server Operator");;
593 if (mode & SILC_UMODE_ROUTER_OPERATOR) {
594 if (app->screen->bottom_line->umode)
595 silc_free(app->screen->bottom_line->umode);
596 app->screen->bottom_line->umode = strdup("SILC Operator");;
599 silc_screen_print_bottom_line(app->screen, 0);
603 case SILC_COMMAND_OPER:
604 if (status == SILC_STATUS_OK) {
605 conn->local_entry->mode |= SILC_UMODE_SERVER_OPERATOR;
606 if (app->screen->bottom_line->umode)
607 silc_free(app->screen->bottom_line->umode);
608 app->screen->bottom_line->umode = strdup("Server Operator");;
609 silc_screen_print_bottom_line(app->screen, 0);
613 case SILC_COMMAND_SILCOPER:
614 if (status == SILC_STATUS_OK) {
615 conn->local_entry->mode |= SILC_UMODE_ROUTER_OPERATOR;
616 if (app->screen->bottom_line->umode)
617 silc_free(app->screen->bottom_line->umode);
618 app->screen->bottom_line->umode = strdup("SILC Operator");;
619 silc_screen_print_bottom_line(app->screen, 0);
623 case SILC_COMMAND_USERS:
627 silc_list_start(conn->current_channel->clients);
628 while ((chu = silc_list_get(conn->current_channel->clients))
630 if (chu->client == conn->local_entry) {
631 if (app->screen->bottom_line->mode)
632 silc_free(app->screen->bottom_line->mode);
633 app->screen->bottom_line->mode = silc_client_chumode_char(chu->mode);
634 silc_screen_print_bottom_line(app->screen, 0);
642 /* Called to indicate that connection was either successfully established
643 or connecting failed. This is also the first time application receives
644 the SilcClientConnection objecet which it should save somewhere. */
646 void silc_connect(SilcClient client, SilcClientConnection conn, int success)
648 SilcClientInternal app = (SilcClientInternal)client->application;
651 app->screen->bottom_line->connection = conn->remote_host;
652 silc_screen_print_bottom_line(app->screen, 0);
657 /* Called to indicate that connection was disconnected to the server. */
659 void silc_disconnect(SilcClient client, SilcClientConnection conn)
661 SilcClientInternal app = (SilcClientInternal)client->application;
663 app->screen->bottom_line->connection = NULL;
664 silc_screen_print_bottom_line(app->screen, 0);
668 /* Asks passphrase from user on the input line. */
670 unsigned char *silc_ask_passphrase(SilcClient client,
671 SilcClientConnection conn)
673 SilcClientInternal app = (SilcClientInternal)conn->client->application;
674 char pass1[256], pass2[256];
681 wattroff(app->screen->input_win, A_INVIS);
682 silc_screen_input_print_prompt(app->screen, "Passphrase: ");
683 wattron(app->screen->input_win, A_INVIS);
686 memset(pass1, 0, sizeof(pass1));
687 wgetnstr(app->screen->input_win, pass1, sizeof(pass1));
689 /* Print retype prompt */
690 wattroff(app->screen->input_win, A_INVIS);
691 silc_screen_input_print_prompt(app->screen, "Retype passphrase: ");
692 wattron(app->screen->input_win, A_INVIS);
695 memset(pass2, 0, sizeof(pass2));
696 wgetnstr(app->screen->input_win, pass2, sizeof(pass2));
698 if (!strncmp(pass1, pass2, strlen(pass2)))
704 ret = silc_calloc(strlen(pass1), sizeof(char));
705 memcpy(ret, pass1, strlen(pass1));
707 memset(pass1, 0, sizeof(pass1));
708 memset(pass2, 0, sizeof(pass2));
710 wattroff(app->screen->input_win, A_INVIS);
711 silc_screen_input_reset(app->screen);
716 /* Verifies received public key. If user decides to trust the key it is
717 saved as trusted server key for later use. If user does not trust the
718 key this returns FALSE. */
720 int silc_verify_server_key(SilcClient client,
721 SilcClientConnection conn,
722 unsigned char *pk, unsigned int pk_len,
723 SilcSKEPKType pk_type)
725 SilcSocketConnection sock = conn->sock;
728 char *hostname, *fingerprint;
732 hostname = sock->hostname ? sock->hostname : sock->ip;
734 if (pk_type != SILC_SKE_PK_TYPE_SILC) {
735 silc_say(client, conn, "We don't support server %s key type", hostname);
739 pw = getpwuid(getuid());
743 memset(filename, 0, sizeof(filename));
744 memset(file, 0, sizeof(file));
745 snprintf(file, sizeof(file) - 1, "serverkey_%s_%d.pub", hostname,
747 snprintf(filename, sizeof(filename) - 1, "%s/.silc/serverkeys/%s",
750 /* Check wheter this key already exists */
751 if (stat(filename, &st) < 0) {
753 fingerprint = silc_hash_fingerprint(NULL, pk, pk_len);
754 silc_say(client, conn, "Received server %s public key", hostname);
755 silc_say(client, conn, "Fingerprint for the server %s key is", hostname);
756 silc_say(client, conn, "%s", fingerprint);
757 silc_free(fingerprint);
759 /* Ask user to verify the key and save it */
760 if (silc_client_ask_yes_no(client,
761 "Would you like to accept the key (y/n)? "))
763 /* Save the key for future checking */
764 silc_pkcs_save_public_key_data(filename, pk, pk_len,
769 /* The key already exists, verify it. */
770 SilcPublicKey public_key;
771 unsigned char *encpk;
772 unsigned int encpk_len;
774 /* Load the key file */
775 if (!silc_pkcs_load_public_key(filename, &public_key,
777 if (!silc_pkcs_load_public_key(filename, &public_key,
778 SILC_PKCS_FILE_BIN)) {
779 fingerprint = silc_hash_fingerprint(NULL, pk, pk_len);
780 silc_say(client, conn, "Received server %s public key", hostname);
781 silc_say(client, conn, "Fingerprint for the server %s key is", hostname);
782 silc_say(client, conn, "%s", fingerprint);
783 silc_free(fingerprint);
784 silc_say(client, conn, "Could not load your local copy of the server %s key",
786 if (silc_client_ask_yes_no(client,
787 "Would you like to accept the key anyway (y/n)? "))
789 /* Save the key for future checking */
791 silc_pkcs_save_public_key_data(filename, pk, pk_len,
799 /* Encode the key data */
800 encpk = silc_pkcs_public_key_encode(public_key, &encpk_len);
802 fingerprint = silc_hash_fingerprint(NULL, pk, pk_len);
803 silc_say(client, conn, "Received server %s public key", hostname);
804 silc_say(client, conn, "Fingerprint for the server %s key is", hostname);
805 silc_say(client, conn, "%s", fingerprint);
806 silc_free(fingerprint);
807 silc_say(client, conn, "Your local copy of the server %s key is malformed",
809 if (silc_client_ask_yes_no(client,
810 "Would you like to accept the key anyway (y/n)? "))
812 /* Save the key for future checking */
814 silc_pkcs_save_public_key_data(filename, pk, pk_len,
822 if (memcmp(encpk, pk, encpk_len)) {
823 fingerprint = silc_hash_fingerprint(NULL, pk, pk_len);
824 silc_say(client, conn, "Received server %s public key", hostname);
825 silc_say(client, conn, "Fingerprint for the server %s key is", hostname);
826 silc_say(client, conn, "%s", fingerprint);
827 silc_free(fingerprint);
828 silc_say(client, conn, "Server %s key does not match with your local copy",
830 silc_say(client, conn, "It is possible that the key has expired or changed");
831 silc_say(client, conn, "It is also possible that some one is performing "
832 "man-in-the-middle attack");
834 /* Ask user to verify the key and save it */
835 if (silc_client_ask_yes_no(client,
836 "Would you like to accept the key anyway (y/n)? "))
838 /* Save the key for future checking */
840 silc_pkcs_save_public_key_data(filename, pk, pk_len,
845 silc_say(client, conn, "Will not accept server %s key", hostname);
849 /* Local copy matched */
853 silc_say(client, conn, "Will not accept server %s key", hostname);
857 /* Find authentication method and authentication data by hostname and
858 port. The hostname may be IP address as well. The found authentication
859 method and authentication data is returned to `auth_meth', `auth_data'
860 and `auth_data_len'. The function returns TRUE if authentication method
861 is found and FALSE if not. `conn' may be NULL. */
863 int silc_get_auth_method(SilcClient client, SilcClientConnection conn,
864 char *hostname, unsigned short port,
865 SilcProtocolAuthMeth *auth_meth,
866 unsigned char **auth_data,
867 unsigned int *auth_data_len)
869 SilcClientInternal app = (SilcClientInternal)client->application;
871 if (app->config->conns) {
872 SilcClientConfigSectionConnection *conn = NULL;
874 /* Check if we find a match from user configured connections */
875 conn = silc_client_config_find_connection(app->config,
879 /* Match found. Use the configured authentication method */
880 *auth_meth = conn->auth_meth;
882 if (conn->auth_data) {
883 *auth_data = strdup(conn->auth_data);
884 *auth_data_len = strlen(conn->auth_data);
894 /* Notifies application that failure packet was received. This is called
895 if there is some protocol active in the client. The `protocol' is the
896 protocol context. The `failure' is opaque pointer to the failure
897 indication. Note, that the `failure' is protocol dependant and application
898 must explicitly cast it to correct type. Usually `failure' is 32 bit
899 failure type (see protocol specs for all protocol failure types). */
901 void silc_failure(SilcClient client, SilcClientConnection conn,
902 SilcProtocol protocol, void *failure)
907 /* Asks whether the user would like to perform the key agreement protocol.
908 This is called after we have received an key agreement packet or an
909 reply to our key agreement packet. This returns TRUE if the user wants
910 the library to perform the key agreement protocol and FALSE if it is not
911 desired (application may start it later by calling the function
912 silc_client_perform_key_agreement). */
914 int silc_key_agreement(SilcClient client, SilcClientConnection conn,
915 SilcClientEntry client_entry, char *hostname,
917 SilcKeyAgreementCallback *completion,
924 /* SILC client operations */
925 SilcClientOperations ops = {
927 channel_message: silc_channel_message,
928 private_message: silc_private_message,
930 command: silc_command,
931 command_reply: silc_command_reply,
932 connect: silc_connect,
933 disconnect: silc_disconnect,
934 get_auth_method: silc_get_auth_method,
935 verify_server_key: silc_verify_server_key,
936 ask_passphrase: silc_ask_passphrase,
937 failure: silc_failure,
938 key_agreement: silc_key_agreement,