5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 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 * Server side of the protocols.
25 #include "serverincludes.h"
26 #include "server_internal.h"
28 SILC_TASK_CALLBACK(silc_server_protocol_connection_auth);
29 SILC_TASK_CALLBACK(silc_server_protocol_key_exchange);
31 extern char *silc_version_string;
34 * Key Exhange protocol functions
37 /* Packet sending callback. This function is provided as packet sending
38 routine to the Key Exchange functions. */
40 static void silc_server_protocol_ke_send_packet(SilcSKE ske,
45 SilcProtocol protocol = (SilcProtocol)context;
46 SilcServerKEInternalContext *ctx =
47 (SilcServerKEInternalContext *)protocol->context;
48 SilcServer server = (SilcServer)ctx->server;
50 /* Send the packet immediately */
51 silc_server_packet_send(server, ske->sock,
52 type, 0, packet->data, packet->len, TRUE);
55 /* Sets the negotiated key material into use for particular connection. */
57 int silc_server_protocol_ke_set_keys(SilcSKE ske,
58 SilcSocketConnection sock,
59 SilcSKEKeyMaterial *keymat,
66 SilcUnknownEntry conn_data;
69 SILC_LOG_DEBUG(("Setting new key into use"));
71 conn_data = silc_calloc(1, sizeof(*conn_data));
72 idata = (SilcIDListData)conn_data;
74 /* Allocate cipher to be used in the communication */
75 if (!silc_cipher_alloc(cipher->cipher->name, &idata->send_key)) {
79 if (!silc_cipher_alloc(cipher->cipher->name, &idata->receive_key)) {
84 if (is_responder == TRUE) {
85 idata->send_key->cipher->set_key(idata->send_key->context,
86 keymat->receive_enc_key,
88 idata->send_key->set_iv(idata->send_key, keymat->receive_iv);
89 idata->receive_key->cipher->set_key(idata->receive_key->context,
92 idata->receive_key->set_iv(idata->receive_key, keymat->send_iv);
95 idata->send_key->cipher->set_key(idata->send_key->context,
98 idata->send_key->set_iv(idata->send_key, keymat->send_iv);
99 idata->receive_key->cipher->set_key(idata->receive_key->context,
100 keymat->receive_enc_key,
101 keymat->enc_key_len);
102 idata->receive_key->set_iv(idata->receive_key, keymat->receive_iv);
106 if (!silc_hash_alloc(hash->hash->name, &idata->hash)) {
107 silc_cipher_free(idata->send_key);
108 silc_cipher_free(idata->receive_key);
109 silc_free(conn_data);
113 /* Save HMAC key to be used in the communication. */
114 if (!silc_hmac_alloc(hmac->hmac->name, NULL, &idata->hmac)) {
115 silc_cipher_free(idata->send_key);
116 silc_cipher_free(idata->receive_key);
117 silc_hash_free(idata->hash);
118 silc_free(conn_data);
121 silc_hmac_set_key(idata->hmac, keymat->hmac_key, keymat->hmac_key_len);
123 sock->user_data = (void *)conn_data;
128 /* Check remote host version string */
130 SilcSKEStatus silc_ske_check_version(SilcSKE ske, unsigned char *version,
133 SilcSKEStatus status = SILC_SKE_STATUS_OK;
135 SILC_LOG_INFO(("%s (%s) is version %s", ske->sock->hostname,
136 ske->sock->ip, version));
138 /* Check for initial version string */
139 if (!strstr(version, "SILC-1.0-"))
140 status = SILC_SKE_STATUS_BAD_VERSION;
142 /* Check software version */
144 if (len < strlen(silc_version_string))
145 status = SILC_SKE_STATUS_BAD_VERSION;
147 /* XXX for now there is no other tests due to the abnormal version
148 string that is used */
153 /* Performs key exchange protocol. This is used for both initiator
154 and responder key exchange. This is performed always when accepting
155 new connection to the server. This may be called recursively. */
157 SILC_TASK_CALLBACK(silc_server_protocol_key_exchange)
159 SilcProtocol protocol = (SilcProtocol)context;
160 SilcServerKEInternalContext *ctx =
161 (SilcServerKEInternalContext *)protocol->context;
162 SilcServer server = (SilcServer)ctx->server;
163 SilcSKEStatus status = 0;
165 SILC_LOG_DEBUG(("Start"));
167 if (protocol->state == SILC_PROTOCOL_STATE_UNKNOWN)
168 protocol->state = SILC_PROTOCOL_STATE_START;
170 SILC_LOG_DEBUG(("State=%d", protocol->state));
172 switch(protocol->state) {
173 case SILC_PROTOCOL_STATE_START:
180 /* Allocate Key Exchange object */
181 ske = silc_ske_alloc();
183 ske->rng = server->rng;
185 if (ctx->responder == TRUE) {
186 /* Start the key exchange by processing the received security
187 properties packet from initiator. */
188 status = silc_ske_responder_start(ske, ctx->rng, ctx->sock,
190 ctx->packet->buffer, NULL, NULL);
192 SilcSKEStartPayload *start_payload;
194 /* Assemble security properties. */
195 silc_ske_assemble_security_properties(ske, SILC_SKE_SP_FLAG_NONE,
199 /* Start the key exchange by sending our security properties
200 to the remote end. */
201 status = silc_ske_initiator_start(ske, ctx->rng, ctx->sock,
203 silc_server_protocol_ke_send_packet,
207 if (status != SILC_SKE_STATUS_OK) {
208 SILC_LOG_WARNING(("Error (type %d) during Key Exchange protocol",
210 SILC_LOG_DEBUG(("Error (type %d) during Key Exchange protocol",
213 protocol->state = SILC_PROTOCOL_STATE_ERROR;
214 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
218 /* Advance protocol state and call the next state if we are responder */
220 if (ctx->responder == TRUE)
221 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 100000);
229 if (ctx->responder == TRUE) {
230 /* Sends the selected security properties to the initiator. */
232 silc_ske_responder_phase_1(ctx->ske,
233 ctx->ske->start_payload,
234 silc_server_protocol_ke_send_packet,
237 /* Call Phase-1 function. This processes the Key Exchange Start
238 paylaod reply we just got from the responder. The callback
239 function will receive the processed payload where we will
241 status = silc_ske_initiator_phase_1(ctx->ske, ctx->packet->buffer,
245 if (status != SILC_SKE_STATUS_OK) {
246 SILC_LOG_WARNING(("Error (type %d) during Key Exchange protocol",
248 SILC_LOG_DEBUG(("Error (type %d) during Key Exchange protocol",
251 protocol->state = SILC_PROTOCOL_STATE_ERROR;
252 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
256 /* Advance protocol state and call next state if we are initiator */
258 if (ctx->responder == FALSE)
259 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 100000);
267 if (ctx->responder == TRUE) {
268 /* Process the received Key Exchange 1 Payload packet from
269 the initiator. This also creates our parts of the Diffie
270 Hellman algorithm. */
271 status = silc_ske_responder_phase_2(ctx->ske, ctx->packet->buffer,
274 /* Call the Phase-2 function. This creates Diffie Hellman
275 key exchange parameters and sends our public part inside
276 Key Exhange 1 Payload to the responder. */
278 silc_ske_initiator_phase_2(ctx->ske,
280 silc_server_protocol_ke_send_packet,
284 if (status != SILC_SKE_STATUS_OK) {
285 SILC_LOG_WARNING(("Error (type %d) during Key Exchange protocol",
287 SILC_LOG_DEBUG(("Error (type %d) during Key Exchange protocol",
290 protocol->state = SILC_PROTOCOL_STATE_ERROR;
291 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
295 /* Advance protocol state and call the next state if we are responder */
297 if (ctx->responder == TRUE)
298 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 100000);
306 if (ctx->responder == TRUE) {
307 /* This creates the key exchange material and sends our
308 public parts to the initiator inside Key Exchange 2 Payload. */
310 silc_ske_responder_finish(ctx->ske,
311 server->public_key, server->private_key,
312 SILC_SKE_PK_TYPE_SILC,
313 silc_server_protocol_ke_send_packet,
316 /* Finish the protocol. This verifies the Key Exchange 2 payload
317 sent by responder. */
318 status = silc_ske_initiator_finish(ctx->ske, ctx->packet->buffer,
319 NULL, NULL, NULL, NULL);
322 if (status != SILC_SKE_STATUS_OK) {
323 SILC_LOG_WARNING(("Error (type %d) during Key Exchange protocol",
325 SILC_LOG_DEBUG(("Error (type %d) during Key Exchange protocol",
328 protocol->state = SILC_PROTOCOL_STATE_ERROR;
329 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
333 /* Send Ok to the other end. We will end the protocol as responder
334 sends Ok to us when we will take the new keys into use. */
335 if (ctx->responder == FALSE)
336 silc_ske_end(ctx->ske, silc_server_protocol_ke_send_packet, context);
338 /* End the protocol on the next round */
339 protocol->state = SILC_PROTOCOL_STATE_END;
343 case SILC_PROTOCOL_STATE_END:
348 SilcSKEKeyMaterial *keymat;
349 int key_len = silc_cipher_get_key_len(ctx->ske->prop->cipher);
350 int hash_len = ctx->ske->prop->hash->hash->hash_len;
352 /* Process the key material */
353 keymat = silc_calloc(1, sizeof(*keymat));
354 status = silc_ske_process_key_material(ctx->ske, 16, key_len, hash_len,
356 if (status != SILC_SKE_STATUS_OK) {
357 protocol->state = SILC_PROTOCOL_STATE_ERROR;
358 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
359 silc_ske_free_key_material(keymat);
362 ctx->keymat = keymat;
364 /* Send Ok to the other end if we are responder. If we are initiator
365 we have sent this already. */
366 if (ctx->responder == TRUE)
367 silc_ske_end(ctx->ske, silc_server_protocol_ke_send_packet, context);
369 /* Unregister the timeout task since the protocol has ended.
370 This was the timeout task to be executed if the protocol is
371 not completed fast enough. */
372 if (ctx->timeout_task)
373 silc_task_unregister(server->timeout_queue, ctx->timeout_task);
375 /* Call the final callback */
376 if (protocol->final_callback)
377 protocol->execute_final(server->timeout_queue, 0, protocol, fd);
379 silc_protocol_free(protocol);
383 case SILC_PROTOCOL_STATE_ERROR:
388 /* Send abort notification */
389 silc_ske_abort(ctx->ske, ctx->ske->status,
390 silc_server_protocol_ke_send_packet,
393 /* Unregister the timeout task since the protocol has ended.
394 This was the timeout task to be executed if the protocol is
395 not completed fast enough. */
396 if (ctx->timeout_task)
397 silc_task_unregister(server->timeout_queue, ctx->timeout_task);
399 /* On error the final callback is always called. */
400 if (protocol->final_callback)
401 protocol->execute_final(server->timeout_queue, 0, protocol, fd);
403 silc_protocol_free(protocol);
406 case SILC_PROTOCOL_STATE_FAILURE:
408 * We have received failure from remote
411 /* Unregister the timeout task since the protocol has ended.
412 This was the timeout task to be executed if the protocol is
413 not completed fast enough. */
414 if (ctx->timeout_task)
415 silc_task_unregister(server->timeout_queue, ctx->timeout_task);
417 /* On error the final callback is always called. */
418 if (protocol->final_callback)
419 protocol->execute_final(server->timeout_queue, 0, protocol, fd);
421 silc_protocol_free(protocol);
424 case SILC_PROTOCOL_STATE_UNKNOWN:
430 * Connection Authentication protocol functions
434 silc_server_password_authentication(SilcServer server, char *auth1,
437 if (!auth1 || !auth2)
440 if (!memcmp(auth1, auth2, strlen(auth1)))
447 silc_server_public_key_authentication(SilcServer server,
448 SilcPublicKey pub_key,
450 unsigned int sign_len,
457 if (!pub_key || !sign)
460 silc_pkcs_alloc(pub_key->name, &pkcs);
461 if (!silc_pkcs_public_key_set(pkcs, pub_key)) {
462 silc_pkcs_free(pkcs);
466 /* Make the authentication data. Protocol says it is HASH plus
468 len = ske->hash_len + ske->start_payload_copy->len;
469 auth = silc_buffer_alloc(len);
470 silc_buffer_pull_tail(auth, len);
471 silc_buffer_format(auth,
472 SILC_STR_UI_XNSTRING(ske->hash, ske->hash_len),
473 SILC_STR_UI_XNSTRING(ske->start_payload_copy->data,
474 ske->start_payload_copy->len),
477 /* Verify signature */
478 if (silc_pkcs_verify(pkcs, sign, sign_len, auth->data, auth->len)) {
479 silc_pkcs_free(pkcs);
480 silc_buffer_free(auth);
484 silc_pkcs_free(pkcs);
485 silc_buffer_free(auth);
490 silc_server_get_public_key_auth(SilcServer server,
491 SilcPublicKey pub_key,
492 unsigned char *auth_data,
493 unsigned int *auth_data_len,
503 silc_pkcs_alloc(pub_key->name, &pkcs);
504 if (!silc_pkcs_public_key_set(pkcs, pub_key)) {
505 silc_pkcs_free(pkcs);
509 /* Make the authentication data. Protocol says it is HASH plus
511 len = ske->hash_len + ske->start_payload_copy->len;
512 auth = silc_buffer_alloc(len);
513 silc_buffer_pull_tail(auth, len);
514 silc_buffer_format(auth,
515 SILC_STR_UI_XNSTRING(ske->hash, ske->hash_len),
516 SILC_STR_UI_XNSTRING(ske->start_payload_copy->data,
517 ske->start_payload_copy->len),
520 if (silc_pkcs_sign(pkcs, auth->data, auth->len, auth_data, auth_data_len)) {
521 silc_pkcs_free(pkcs);
522 silc_buffer_free(auth);
526 silc_pkcs_free(pkcs);
527 silc_buffer_free(auth);
531 /* Performs connection authentication protocol. If responder, we
532 authenticate the remote data received. If initiator, we will send
533 authentication data to the remote end. */
535 SILC_TASK_CALLBACK(silc_server_protocol_connection_auth)
537 SilcProtocol protocol = (SilcProtocol)context;
538 SilcServerConnAuthInternalContext *ctx =
539 (SilcServerConnAuthInternalContext *)protocol->context;
540 SilcServer server = (SilcServer)ctx->server;
542 SILC_LOG_DEBUG(("Start"));
544 if (protocol->state == SILC_PROTOCOL_STATE_UNKNOWN)
545 protocol->state = SILC_PROTOCOL_STATE_START;
547 SILC_LOG_DEBUG(("State=%d", protocol->state));
549 switch(protocol->state) {
550 case SILC_PROTOCOL_STATE_START:
556 if (ctx->responder == TRUE) {
558 * We are receiving party
561 unsigned short payload_len;
562 unsigned short conn_type;
563 unsigned char *auth_data = NULL;
565 SILC_LOG_INFO(("Performing authentication protocol for %s (%s)",
566 ctx->sock->hostname, ctx->sock->ip));
568 /* Parse the received authentication data packet. The received
569 payload is Connection Auth Payload. */
570 ret = silc_buffer_unformat(ctx->packet->buffer,
571 SILC_STR_UI_SHORT(&payload_len),
572 SILC_STR_UI_SHORT(&conn_type),
575 SILC_LOG_DEBUG(("Bad payload in authentication packet"));
576 protocol->state = SILC_PROTOCOL_STATE_ERROR;
577 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
581 if (payload_len != ctx->packet->buffer->len) {
582 SILC_LOG_DEBUG(("Bad payload in authentication packet"));
583 protocol->state = SILC_PROTOCOL_STATE_ERROR;
584 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
590 if (conn_type < SILC_SOCKET_TYPE_CLIENT ||
591 conn_type > SILC_SOCKET_TYPE_ROUTER) {
592 SILC_LOG_ERROR(("Bad connection type %d", conn_type));
593 protocol->state = SILC_PROTOCOL_STATE_ERROR;
594 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 300000);
598 if (payload_len > 0) {
599 /* Get authentication data */
600 silc_buffer_pull(ctx->packet->buffer, 4);
601 ret = silc_buffer_unformat(ctx->packet->buffer,
602 SILC_STR_UI_XNSTRING(&auth_data,
606 SILC_LOG_DEBUG(("Bad payload in authentication packet"));
607 protocol->state = SILC_PROTOCOL_STATE_ERROR;
608 protocol->execute(server->timeout_queue, 0,
609 protocol, fd, 0, 300000);
615 * Check the remote connection type and make sure that we have
616 * configured this connection. If we haven't allowed this connection
617 * the authentication must be failed.
620 SILC_LOG_DEBUG(("Remote connection type %d", conn_type));
622 /* Remote end is client */
623 if (conn_type == SILC_SOCKET_TYPE_CLIENT) {
624 SilcServerConfigSectionClientConnection *client = NULL;
625 client = silc_server_config_find_client_conn(server->config,
629 client = silc_server_config_find_client_conn(server->config,
634 switch(client->auth_meth) {
636 /* No authentication required */
637 SILC_LOG_DEBUG(("No authentication required"));
640 case SILC_AUTH_PASSWORD:
641 /* Password authentication */
642 SILC_LOG_DEBUG(("Password authentication"));
643 ret = silc_server_password_authentication(server, auth_data,
649 /* Authentication failed */
650 SILC_LOG_ERROR(("Authentication failed"));
651 SILC_LOG_DEBUG(("Authentication failed"));
652 protocol->state = SILC_PROTOCOL_STATE_ERROR;
653 protocol->execute(server->timeout_queue, 0,
654 protocol, fd, 0, 300000);
658 case SILC_AUTH_PUBLIC_KEY:
659 /* Public key authentication */
660 SILC_LOG_DEBUG(("Public key authentication"));
661 ret = silc_server_public_key_authentication(server,
670 SILC_LOG_ERROR(("Authentication failed"));
671 SILC_LOG_DEBUG(("Authentication failed"));
672 protocol->state = SILC_PROTOCOL_STATE_ERROR;
673 protocol->execute(server->timeout_queue, 0,
674 protocol, fd, 0, 300000);
678 SILC_LOG_DEBUG(("No configuration for remote connection"));
679 SILC_LOG_ERROR(("Remote connection not configured"));
680 SILC_LOG_ERROR(("Authentication failed"));
681 protocol->state = SILC_PROTOCOL_STATE_ERROR;
682 protocol->execute(server->timeout_queue, 0,
683 protocol, fd, 0, 300000);
688 /* Remote end is server */
689 if (conn_type == SILC_SOCKET_TYPE_SERVER) {
690 SilcServerConfigSectionServerConnection *serv = NULL;
691 serv = silc_server_config_find_server_conn(server->config,
695 serv = silc_server_config_find_server_conn(server->config,
700 switch(serv->auth_meth) {
702 /* No authentication required */
703 SILC_LOG_DEBUG(("No authentication required"));
706 case SILC_AUTH_PASSWORD:
707 /* Password authentication */
708 SILC_LOG_DEBUG(("Password authentication"));
709 ret = silc_server_password_authentication(server, auth_data,
715 /* Authentication failed */
716 SILC_LOG_ERROR(("Authentication failed"));
717 SILC_LOG_DEBUG(("Authentication failed"));
718 protocol->state = SILC_PROTOCOL_STATE_ERROR;
719 protocol->execute(server->timeout_queue, 0,
720 protocol, fd, 0, 300000);
724 case SILC_AUTH_PUBLIC_KEY:
725 /* Public key authentication */
726 SILC_LOG_DEBUG(("Public key authentication"));
727 ret = silc_server_public_key_authentication(server,
736 SILC_LOG_ERROR(("Authentication failed"));
737 SILC_LOG_DEBUG(("Authentication failed"));
738 protocol->state = SILC_PROTOCOL_STATE_ERROR;
739 protocol->execute(server->timeout_queue, 0,
740 protocol, fd, 0, 300000);
744 SILC_LOG_DEBUG(("No configuration for remote connection"));
745 SILC_LOG_ERROR(("Remote connection not configured"));
746 SILC_LOG_ERROR(("Authentication failed"));
747 protocol->state = SILC_PROTOCOL_STATE_ERROR;
748 protocol->execute(server->timeout_queue, 0,
749 protocol, fd, 0, 300000);
754 /* Remote end is router */
755 if (conn_type == SILC_SOCKET_TYPE_ROUTER) {
756 SilcServerConfigSectionServerConnection *serv = NULL;
757 serv = silc_server_config_find_router_conn(server->config,
761 serv = silc_server_config_find_router_conn(server->config,
766 switch(serv->auth_meth) {
768 /* No authentication required */
769 SILC_LOG_DEBUG(("No authentication required"));
772 case SILC_AUTH_PASSWORD:
773 /* Password authentication */
774 SILC_LOG_DEBUG(("Password authentication"));
775 ret = silc_server_password_authentication(server, auth_data,
781 /* Authentication failed */
782 SILC_LOG_ERROR(("Authentication failed"));
783 SILC_LOG_DEBUG(("Authentication failed"));
784 protocol->state = SILC_PROTOCOL_STATE_ERROR;
785 protocol->execute(server->timeout_queue, 0,
786 protocol, fd, 0, 300000);
790 case SILC_AUTH_PUBLIC_KEY:
791 /* Public key authentication */
792 SILC_LOG_DEBUG(("Public key authentication"));
793 ret = silc_server_public_key_authentication(server,
802 SILC_LOG_ERROR(("Authentication failed"));
803 SILC_LOG_DEBUG(("Authentication failed"));
804 protocol->state = SILC_PROTOCOL_STATE_ERROR;
805 protocol->execute(server->timeout_queue, 0,
806 protocol, fd, 0, 300000);
810 SILC_LOG_DEBUG(("No configuration for remote connection"));
811 SILC_LOG_ERROR(("Remote connection not configured"));
812 SILC_LOG_ERROR(("Authentication failed"));
813 protocol->state = SILC_PROTOCOL_STATE_ERROR;
814 protocol->execute(server->timeout_queue, 0,
815 protocol, fd, 0, 300000);
820 /* Save connection type. This is later used to create the
821 ID for the connection. */
822 ctx->conn_type = conn_type;
824 /* Advance protocol state. */
825 protocol->state = SILC_PROTOCOL_STATE_END;
826 protocol->execute(server->timeout_queue, 0, protocol, fd, 0, 0);
830 * We are initiator. We are authenticating ourselves to a
831 * remote server. We will send the authentication data to the
832 * other end for verify.
836 unsigned char *auth_data = NULL;
837 unsigned int auth_data_len = 0;
839 switch(ctx->auth_meth) {
841 /* No authentication required */
844 case SILC_AUTH_PASSWORD:
845 /* Password authentication */
846 if (ctx->auth_data && ctx->auth_data_len) {
847 auth_data = strdup(ctx->auth_data);
848 auth_data_len = ctx->auth_data_len;
853 case SILC_AUTH_PUBLIC_KEY:
855 unsigned char sign[1024];
857 /* Public key authentication */
858 silc_server_get_public_key_auth(server, ctx->auth_data,
859 sign, &auth_data_len,
865 payload_len = 4 + auth_data_len;
866 packet = silc_buffer_alloc(payload_len);
867 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
868 silc_buffer_format(packet,
869 SILC_STR_UI_SHORT(payload_len),
870 SILC_STR_UI_SHORT(server->server_type
872 SILC_SOCKET_TYPE_SERVER :
873 SILC_SOCKET_TYPE_ROUTER),
874 SILC_STR_UI_XNSTRING(auth_data, auth_data_len),
877 /* Send the packet to server */
878 silc_server_packet_send(server, ctx->sock,
879 SILC_PACKET_CONNECTION_AUTH, 0,
880 packet->data, packet->len, TRUE);
883 memset(auth_data, 0, auth_data_len);
884 silc_free(auth_data);
886 silc_buffer_free(packet);
888 /* Next state is end of protocol */
889 protocol->state = SILC_PROTOCOL_STATE_END;
894 case SILC_PROTOCOL_STATE_END:
901 SILC_PUT32_MSB(SILC_AUTH_OK, ok);
903 /* Authentication failed */
904 silc_server_packet_send(server, ctx->sock, SILC_PACKET_SUCCESS,
907 /* Unregister the timeout task since the protocol has ended.
908 This was the timeout task to be executed if the protocol is
909 not completed fast enough. */
910 if (ctx->timeout_task)
911 silc_task_unregister(server->timeout_queue, ctx->timeout_task);
913 /* Protocol has ended, call the final callback */
914 if (protocol->final_callback)
915 protocol->execute_final(server->timeout_queue, 0, protocol, fd);
917 silc_protocol_free(protocol);
920 case SILC_PROTOCOL_STATE_ERROR:
923 * Error. Send notify to remote.
925 unsigned char error[4];
927 SILC_PUT32_MSB(SILC_AUTH_FAILED, error);
929 /* Authentication failed */
930 silc_server_packet_send(server, ctx->sock, SILC_PACKET_FAILURE,
933 /* Unregister the timeout task since the protocol has ended.
934 This was the timeout task to be executed if the protocol is
935 not completed fast enough. */
936 if (ctx->timeout_task)
937 silc_task_unregister(server->timeout_queue, ctx->timeout_task);
939 /* On error the final callback is always called. */
940 if (protocol->final_callback)
941 protocol->execute_final(server->timeout_queue, 0, protocol, fd);
943 silc_protocol_free(protocol);
947 case SILC_PROTOCOL_STATE_FAILURE:
949 * We have received failure from remote
952 /* Unregister the timeout task since the protocol has ended.
953 This was the timeout task to be executed if the protocol is
954 not completed fast enough. */
955 if (ctx->timeout_task)
956 silc_task_unregister(server->timeout_queue, ctx->timeout_task);
958 /* On error the final callback is always called. */
959 if (protocol->final_callback)
960 protocol->execute_final(server->timeout_queue, 0, protocol, fd);
962 silc_protocol_free(protocol);
965 case SILC_PROTOCOL_STATE_UNKNOWN:
970 /* Registers protocols used in server. */
972 void silc_server_protocols_register(void)
974 silc_protocol_register(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
975 silc_server_protocol_connection_auth);
976 silc_protocol_register(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
977 silc_server_protocol_key_exchange);
980 /* Unregisters protocols */
982 void silc_server_protocols_unregister(void)
984 silc_protocol_unregister(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
985 silc_server_protocol_connection_auth);
986 silc_protocol_unregister(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
987 silc_server_protocol_key_exchange);