2 * Copyright (c) 2012 The FreeBSD Foundation
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
41 #include <netinet/in.h>
44 #include "iscsi_proto.h"
46 static void login_send_error(struct pdu *request,
47 char class, char detail);
50 login_set_nsg(struct pdu *response, int nsg)
52 struct iscsi_bhs_login_response *bhslr;
54 assert(nsg == BHSLR_STAGE_SECURITY_NEGOTIATION ||
55 nsg == BHSLR_STAGE_OPERATIONAL_NEGOTIATION ||
56 nsg == BHSLR_STAGE_FULL_FEATURE_PHASE);
58 bhslr = (struct iscsi_bhs_login_response *)response->pdu_bhs;
60 bhslr->bhslr_flags &= 0xFC;
61 bhslr->bhslr_flags |= nsg;
65 login_csg(const struct pdu *request)
67 struct iscsi_bhs_login_request *bhslr;
69 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
71 return ((bhslr->bhslr_flags & 0x0C) >> 2);
75 login_set_csg(struct pdu *response, int csg)
77 struct iscsi_bhs_login_response *bhslr;
79 assert(csg == BHSLR_STAGE_SECURITY_NEGOTIATION ||
80 csg == BHSLR_STAGE_OPERATIONAL_NEGOTIATION ||
81 csg == BHSLR_STAGE_FULL_FEATURE_PHASE);
83 bhslr = (struct iscsi_bhs_login_response *)response->pdu_bhs;
85 bhslr->bhslr_flags &= 0xF3;
86 bhslr->bhslr_flags |= csg << 2;
90 login_receive(struct connection *conn, bool initial)
93 struct iscsi_bhs_login_request *bhslr;
95 request = pdu_new(conn);
97 if ((request->pdu_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) !=
98 ISCSI_BHS_OPCODE_LOGIN_REQUEST) {
100 * The first PDU in session is special - if we receive any PDU
101 * different than login request, we have to drop the connection
102 * without sending response ("A target receiving any PDU
103 * except a Login request before the Login Phase is started MUST
104 * immediately terminate the connection on which the PDU
107 if (initial == false)
108 login_send_error(request, 0x02, 0x0b);
109 log_errx(1, "protocol error: received invalid opcode 0x%x",
110 request->pdu_bhs->bhs_opcode);
112 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
114 * XXX: Implement the C flag some day.
116 if ((bhslr->bhslr_flags & BHSLR_FLAGS_CONTINUE) != 0) {
117 login_send_error(request, 0x03, 0x00);
118 log_errx(1, "received Login PDU with unsupported \"C\" flag");
120 if (bhslr->bhslr_version_max != 0x00) {
121 login_send_error(request, 0x02, 0x05);
122 log_errx(1, "received Login PDU with unsupported "
123 "Version-max 0x%x", bhslr->bhslr_version_max);
125 if (bhslr->bhslr_version_min != 0x00) {
126 login_send_error(request, 0x02, 0x05);
127 log_errx(1, "received Login PDU with unsupported "
128 "Version-min 0x%x", bhslr->bhslr_version_min);
130 if (ntohl(bhslr->bhslr_cmdsn) < conn->conn_cmdsn) {
131 login_send_error(request, 0x02, 0x05);
132 log_errx(1, "received Login PDU with decreasing CmdSN: "
133 "was %d, is %d", conn->conn_cmdsn,
134 ntohl(bhslr->bhslr_cmdsn));
136 if (initial == false &&
137 ntohl(bhslr->bhslr_expstatsn) != conn->conn_statsn) {
138 login_send_error(request, 0x02, 0x05);
139 log_errx(1, "received Login PDU with wrong ExpStatSN: "
140 "is %d, should be %d", ntohl(bhslr->bhslr_expstatsn),
143 conn->conn_cmdsn = ntohl(bhslr->bhslr_cmdsn);
149 login_new_response(struct pdu *request)
151 struct pdu *response;
152 struct connection *conn;
153 struct iscsi_bhs_login_request *bhslr;
154 struct iscsi_bhs_login_response *bhslr2;
156 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
157 conn = request->pdu_connection;
159 response = pdu_new_response(request);
160 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
161 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGIN_RESPONSE;
162 login_set_csg(response, BHSLR_STAGE_SECURITY_NEGOTIATION);
163 memcpy(bhslr2->bhslr_isid,
164 bhslr->bhslr_isid, sizeof(bhslr2->bhslr_isid));
165 bhslr2->bhslr_initiator_task_tag = bhslr->bhslr_initiator_task_tag;
166 bhslr2->bhslr_statsn = htonl(conn->conn_statsn++);
167 bhslr2->bhslr_expcmdsn = htonl(conn->conn_cmdsn);
168 bhslr2->bhslr_maxcmdsn = htonl(conn->conn_cmdsn);
174 login_send_error(struct pdu *request, char class, char detail)
176 struct pdu *response;
177 struct iscsi_bhs_login_response *bhslr2;
179 log_debugx("sending Login Response PDU with failure class 0x%x/0x%x; "
180 "see next line for reason", class, detail);
181 response = login_new_response(request);
182 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
183 bhslr2->bhslr_status_class = class;
184 bhslr2->bhslr_status_detail = detail;
187 pdu_delete(response);
191 login_list_contains(const char *list, const char *what)
193 char *tofree, *str, *token;
195 tofree = str = checked_strdup(list);
197 while ((token = strsep(&str, ",")) != NULL) {
198 if (strcmp(token, what) == 0) {
208 login_list_prefers(const char *list,
209 const char *choice1, const char *choice2)
211 char *tofree, *str, *token;
213 tofree = str = checked_strdup(list);
215 while ((token = strsep(&str, ",")) != NULL) {
216 if (strcmp(token, choice1) == 0) {
220 if (strcmp(token, choice2) == 0) {
230 login_receive_chap_a(struct connection *conn)
233 struct keys *request_keys;
236 request = login_receive(conn, false);
237 request_keys = keys_new();
238 keys_load(request_keys, request);
240 chap_a = keys_find(request_keys, "CHAP_A");
241 if (chap_a == NULL) {
242 login_send_error(request, 0x02, 0x07);
243 log_errx(1, "received CHAP Login PDU without CHAP_A");
245 if (login_list_contains(chap_a, "5") == 0) {
246 login_send_error(request, 0x02, 0x01);
247 log_errx(1, "received CHAP Login PDU with unsupported CHAP_A "
250 keys_delete(request_keys);
256 login_send_chap_c(struct pdu *request, struct chap *chap)
258 struct pdu *response;
259 struct keys *response_keys;
260 char *chap_c, *chap_i;
262 chap_c = chap_get_challenge(chap);
263 chap_i = chap_get_id(chap);
265 response = login_new_response(request);
266 response_keys = keys_new();
267 keys_add(response_keys, "CHAP_A", "5");
268 keys_add(response_keys, "CHAP_I", chap_i);
269 keys_add(response_keys, "CHAP_C", chap_c);
272 keys_save(response_keys, response);
274 pdu_delete(response);
275 keys_delete(response_keys);
279 login_receive_chap_r(struct connection *conn, struct auth_group *ag,
280 struct chap *chap, const struct auth **authp)
283 struct keys *request_keys;
284 const char *chap_n, *chap_r;
285 const struct auth *auth;
288 request = login_receive(conn, false);
289 request_keys = keys_new();
290 keys_load(request_keys, request);
292 chap_n = keys_find(request_keys, "CHAP_N");
293 if (chap_n == NULL) {
294 login_send_error(request, 0x02, 0x07);
295 log_errx(1, "received CHAP Login PDU without CHAP_N");
297 chap_r = keys_find(request_keys, "CHAP_R");
298 if (chap_r == NULL) {
299 login_send_error(request, 0x02, 0x07);
300 log_errx(1, "received CHAP Login PDU without CHAP_R");
302 error = chap_receive(chap, chap_r);
304 login_send_error(request, 0x02, 0x07);
305 log_errx(1, "received CHAP Login PDU with malformed CHAP_R");
309 * Verify the response.
311 assert(ag->ag_type == AG_TYPE_CHAP ||
312 ag->ag_type == AG_TYPE_CHAP_MUTUAL);
313 auth = auth_find(ag, chap_n);
315 login_send_error(request, 0x02, 0x01);
316 log_errx(1, "received CHAP Login with invalid user \"%s\"",
320 assert(auth->a_secret != NULL);
321 assert(strlen(auth->a_secret) > 0);
323 error = chap_authenticate(chap, auth->a_secret);
325 login_send_error(request, 0x02, 0x01);
326 log_errx(1, "CHAP authentication failed for user \"%s\"",
330 keys_delete(request_keys);
337 login_send_chap_success(struct pdu *request,
338 const struct auth *auth)
340 struct pdu *response;
341 struct keys *request_keys, *response_keys;
342 struct iscsi_bhs_login_response *bhslr2;
344 const char *chap_i, *chap_c;
348 response = login_new_response(request);
349 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
350 bhslr2->bhslr_flags |= BHSLR_FLAGS_TRANSIT;
351 login_set_nsg(response, BHSLR_STAGE_OPERATIONAL_NEGOTIATION);
354 * Actually, one more thing: mutual authentication.
356 request_keys = keys_new();
357 keys_load(request_keys, request);
358 chap_i = keys_find(request_keys, "CHAP_I");
359 chap_c = keys_find(request_keys, "CHAP_C");
360 if (chap_i != NULL || chap_c != NULL) {
361 if (chap_i == NULL) {
362 login_send_error(request, 0x02, 0x07);
363 log_errx(1, "initiator requested target "
364 "authentication, but didn't send CHAP_I");
366 if (chap_c == NULL) {
367 login_send_error(request, 0x02, 0x07);
368 log_errx(1, "initiator requested target "
369 "authentication, but didn't send CHAP_C");
371 if (auth->a_auth_group->ag_type != AG_TYPE_CHAP_MUTUAL) {
372 login_send_error(request, 0x02, 0x01);
373 log_errx(1, "initiator requests target authentication "
374 "for user \"%s\", but mutual user/secret "
375 "is not set", auth->a_user);
378 log_debugx("performing mutual authentication as user \"%s\"",
379 auth->a_mutual_user);
381 rchap = rchap_new(auth->a_mutual_secret);
382 error = rchap_receive(rchap, chap_i, chap_c);
384 login_send_error(request, 0x02, 0x07);
385 log_errx(1, "received CHAP Login PDU with malformed "
388 chap_r = rchap_get_response(rchap);
390 response_keys = keys_new();
391 keys_add(response_keys, "CHAP_N", auth->a_mutual_user);
392 keys_add(response_keys, "CHAP_R", chap_r);
394 keys_save(response_keys, response);
395 keys_delete(response_keys);
397 log_debugx("initiator did not request target authentication");
400 keys_delete(request_keys);
402 pdu_delete(response);
406 login_chap(struct connection *conn, struct auth_group *ag)
408 const struct auth *auth;
413 * Receive CHAP_A PDU.
415 log_debugx("beginning CHAP authentication; waiting for CHAP_A");
416 request = login_receive_chap_a(conn);
419 * Generate the challenge.
424 * Send the challenge.
426 log_debugx("sending CHAP_C, binary challenge size is %zd bytes",
427 sizeof(chap->chap_challenge));
428 login_send_chap_c(request, chap);
432 * Receive CHAP_N/CHAP_R PDU and authenticate.
434 log_debugx("waiting for CHAP_N/CHAP_R");
435 request = login_receive_chap_r(conn, ag, chap, &auth);
438 * Yay, authentication succeeded!
440 log_debugx("authentication succeeded for user \"%s\"; "
441 "transitioning to Negotiation Phase", auth->a_user);
442 login_send_chap_success(request, auth);
446 * Leave username and CHAP information for discovery().
448 conn->conn_user = auth->a_user;
449 conn->conn_chap = chap;
453 login_negotiate_key(struct pdu *request, const char *name,
454 const char *value, bool skipped_security, struct keys *response_keys)
457 struct connection *conn;
459 conn = request->pdu_connection;
461 if (strcmp(name, "InitiatorName") == 0) {
462 if (!skipped_security)
463 log_errx(1, "initiator resent InitiatorName");
464 } else if (strcmp(name, "SessionType") == 0) {
465 if (!skipped_security)
466 log_errx(1, "initiator resent SessionType");
467 } else if (strcmp(name, "TargetName") == 0) {
468 if (!skipped_security)
469 log_errx(1, "initiator resent TargetName");
470 } else if (strcmp(name, "InitiatorAlias") == 0) {
471 if (conn->conn_initiator_alias != NULL)
472 free(conn->conn_initiator_alias);
473 conn->conn_initiator_alias = checked_strdup(value);
474 } else if (strcmp(value, "Irrelevant") == 0) {
476 } else if (strcmp(name, "HeaderDigest") == 0) {
478 * We don't handle digests for discovery sessions.
480 if (conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY) {
481 log_debugx("discovery session; digests disabled");
482 keys_add(response_keys, name, "None");
486 which = login_list_prefers(value, "CRC32C", "None");
489 log_debugx("initiator prefers CRC32C "
490 "for header digest; we'll use it");
491 conn->conn_header_digest = CONN_DIGEST_CRC32C;
492 keys_add(response_keys, name, "CRC32C");
495 log_debugx("initiator prefers not to do "
496 "header digest; we'll comply");
497 keys_add(response_keys, name, "None");
500 log_warnx("initiator sent unrecognized "
501 "HeaderDigest value \"%s\"; will use None", value);
502 keys_add(response_keys, name, "None");
505 } else if (strcmp(name, "DataDigest") == 0) {
506 if (conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY) {
507 log_debugx("discovery session; digests disabled");
508 keys_add(response_keys, name, "None");
512 which = login_list_prefers(value, "CRC32C", "None");
515 log_debugx("initiator prefers CRC32C "
516 "for data digest; we'll use it");
517 conn->conn_data_digest = CONN_DIGEST_CRC32C;
518 keys_add(response_keys, name, "CRC32C");
521 log_debugx("initiator prefers not to do "
522 "data digest; we'll comply");
523 keys_add(response_keys, name, "None");
526 log_warnx("initiator sent unrecognized "
527 "DataDigest value \"%s\"; will use None", value);
528 keys_add(response_keys, name, "None");
531 } else if (strcmp(name, "MaxConnections") == 0) {
532 keys_add(response_keys, name, "1");
533 } else if (strcmp(name, "InitialR2T") == 0) {
534 keys_add(response_keys, name, "Yes");
535 } else if (strcmp(name, "ImmediateData") == 0) {
536 if (conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY) {
537 log_debugx("discovery session; ImmediateData irrelevant");
538 keys_add(response_keys, name, "Irrelevant");
540 if (strcmp(value, "Yes") == 0) {
541 conn->conn_immediate_data = true;
542 keys_add(response_keys, name, "Yes");
544 conn->conn_immediate_data = false;
545 keys_add(response_keys, name, "No");
548 } else if (strcmp(name, "MaxRecvDataSegmentLength") == 0) {
549 tmp = strtoul(value, NULL, 10);
551 login_send_error(request, 0x02, 0x00);
552 log_errx(1, "received invalid "
553 "MaxRecvDataSegmentLength");
555 if (tmp > MAX_DATA_SEGMENT_LENGTH) {
556 log_debugx("capping MaxRecvDataSegmentLength "
557 "from %d to %d", tmp, MAX_DATA_SEGMENT_LENGTH);
558 tmp = MAX_DATA_SEGMENT_LENGTH;
560 conn->conn_max_data_segment_length = tmp;
561 keys_add_int(response_keys, name, tmp);
562 } else if (strcmp(name, "MaxBurstLength") == 0) {
563 tmp = strtoul(value, NULL, 10);
565 login_send_error(request, 0x02, 0x00);
566 log_errx(1, "received invalid MaxBurstLength");
568 if (tmp > MAX_BURST_LENGTH) {
569 log_debugx("capping MaxBurstLength from %d to %d",
570 tmp, MAX_BURST_LENGTH);
571 tmp = MAX_BURST_LENGTH;
573 conn->conn_max_burst_length = tmp;
574 keys_add(response_keys, name, value);
575 } else if (strcmp(name, "FirstBurstLength") == 0) {
576 tmp = strtoul(value, NULL, 10);
578 login_send_error(request, 0x02, 0x00);
579 log_errx(1, "received invalid "
582 if (tmp > MAX_DATA_SEGMENT_LENGTH) {
583 log_debugx("capping FirstBurstLength from %d to %d",
584 tmp, MAX_DATA_SEGMENT_LENGTH);
585 tmp = MAX_DATA_SEGMENT_LENGTH;
588 * We don't pass the value to the kernel; it only enforces
589 * hardcoded limit anyway.
591 keys_add_int(response_keys, name, tmp);
592 } else if (strcmp(name, "DefaultTime2Wait") == 0) {
593 keys_add(response_keys, name, value);
594 } else if (strcmp(name, "DefaultTime2Retain") == 0) {
595 keys_add(response_keys, name, "0");
596 } else if (strcmp(name, "MaxOutstandingR2T") == 0) {
597 keys_add(response_keys, name, "1");
598 } else if (strcmp(name, "DataPDUInOrder") == 0) {
599 keys_add(response_keys, name, "Yes");
600 } else if (strcmp(name, "DataSequenceInOrder") == 0) {
601 keys_add(response_keys, name, "Yes");
602 } else if (strcmp(name, "ErrorRecoveryLevel") == 0) {
603 keys_add(response_keys, name, "0");
604 } else if (strcmp(name, "OFMarker") == 0) {
605 keys_add(response_keys, name, "No");
606 } else if (strcmp(name, "IFMarker") == 0) {
607 keys_add(response_keys, name, "No");
609 log_debugx("unknown key \"%s\"; responding "
610 "with NotUnderstood", name);
611 keys_add(response_keys, name, "NotUnderstood");
616 login_negotiate(struct connection *conn, struct pdu *request)
618 struct pdu *response;
619 struct iscsi_bhs_login_response *bhslr2;
620 struct keys *request_keys, *response_keys;
622 bool skipped_security;
624 if (request == NULL) {
625 log_debugx("beginning operational parameter negotiation; "
626 "waiting for Login PDU");
627 request = login_receive(conn, false);
628 skipped_security = false;
630 skipped_security = true;
632 request_keys = keys_new();
633 keys_load(request_keys, request);
635 response = login_new_response(request);
636 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
637 bhslr2->bhslr_flags |= BHSLR_FLAGS_TRANSIT;
638 bhslr2->bhslr_tsih = htons(0xbadd);
639 login_set_csg(response, BHSLR_STAGE_OPERATIONAL_NEGOTIATION);
640 login_set_nsg(response, BHSLR_STAGE_FULL_FEATURE_PHASE);
641 response_keys = keys_new();
643 if (skipped_security &&
644 conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
645 if (conn->conn_target->t_alias != NULL)
646 keys_add(response_keys,
647 "TargetAlias", conn->conn_target->t_alias);
648 keys_add_int(response_keys, "TargetPortalGroupTag",
649 conn->conn_portal->p_portal_group->pg_tag);
652 for (i = 0; i < KEYS_MAX; i++) {
653 if (request_keys->keys_names[i] == NULL)
656 login_negotiate_key(request, request_keys->keys_names[i],
657 request_keys->keys_values[i], skipped_security,
661 log_debugx("operational parameter negotiation done; "
662 "transitioning to Full Feature Phase");
664 keys_save(response_keys, response);
666 pdu_delete(response);
667 keys_delete(response_keys);
669 keys_delete(request_keys);
673 login(struct connection *conn)
675 struct pdu *request, *response;
676 struct iscsi_bhs_login_request *bhslr;
677 struct iscsi_bhs_login_response *bhslr2;
678 struct keys *request_keys, *response_keys;
679 struct auth_group *ag;
680 struct portal_group *pg;
681 const char *initiator_name, *initiator_alias, *session_type,
682 *target_name, *auth_method;
685 * Handle the initial Login Request - figure out required authentication
686 * method and either transition to the next phase, if no authentication
687 * is required, or call appropriate authentication code.
689 log_debugx("beginning Login Phase; waiting for Login PDU");
690 request = login_receive(conn, true);
691 bhslr = (struct iscsi_bhs_login_request *)request->pdu_bhs;
692 if (bhslr->bhslr_tsih != 0) {
693 login_send_error(request, 0x02, 0x0a);
694 log_errx(1, "received Login PDU with non-zero TSIH");
697 pg = conn->conn_portal->p_portal_group;
699 memcpy(conn->conn_initiator_isid, bhslr->bhslr_isid,
700 sizeof(conn->conn_initiator_isid));
703 * XXX: Implement the C flag some day.
705 request_keys = keys_new();
706 keys_load(request_keys, request);
708 assert(conn->conn_initiator_name == NULL);
709 initiator_name = keys_find(request_keys, "InitiatorName");
710 if (initiator_name == NULL) {
711 login_send_error(request, 0x02, 0x07);
712 log_errx(1, "received Login PDU without InitiatorName");
714 if (valid_iscsi_name(initiator_name) == false) {
715 login_send_error(request, 0x02, 0x00);
716 log_errx(1, "received Login PDU with invalid InitiatorName");
718 conn->conn_initiator_name = checked_strdup(initiator_name);
719 log_set_peer_name(conn->conn_initiator_name);
721 * XXX: This doesn't work (does nothing) because of Capsicum.
723 setproctitle("%s (%s)", conn->conn_initiator_addr, conn->conn_initiator_name);
725 initiator_alias = keys_find(request_keys, "InitiatorAlias");
726 if (initiator_alias != NULL)
727 conn->conn_initiator_alias = checked_strdup(initiator_alias);
729 assert(conn->conn_session_type == CONN_SESSION_TYPE_NONE);
730 session_type = keys_find(request_keys, "SessionType");
731 if (session_type != NULL) {
732 if (strcmp(session_type, "Normal") == 0) {
733 conn->conn_session_type = CONN_SESSION_TYPE_NORMAL;
734 } else if (strcmp(session_type, "Discovery") == 0) {
735 conn->conn_session_type = CONN_SESSION_TYPE_DISCOVERY;
737 login_send_error(request, 0x02, 0x00);
738 log_errx(1, "received Login PDU with invalid "
739 "SessionType \"%s\"", session_type);
742 conn->conn_session_type = CONN_SESSION_TYPE_NORMAL;
744 assert(conn->conn_target == NULL);
745 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
746 target_name = keys_find(request_keys, "TargetName");
747 if (target_name == NULL) {
748 login_send_error(request, 0x02, 0x07);
749 log_errx(1, "received Login PDU without TargetName");
752 conn->conn_target = target_find(pg->pg_conf, target_name);
753 if (conn->conn_target == NULL) {
754 login_send_error(request, 0x02, 0x03);
755 log_errx(1, "requested target \"%s\" not found",
761 * At this point we know what kind of authentication we need.
763 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
764 ag = conn->conn_target->t_auth_group;
765 if (ag->ag_name != NULL) {
766 log_debugx("initiator requests to connect "
767 "to target \"%s\"; auth-group \"%s\"",
768 conn->conn_target->t_name,
771 log_debugx("initiator requests to connect "
772 "to target \"%s\"", conn->conn_target->t_name);
775 assert(conn->conn_session_type == CONN_SESSION_TYPE_DISCOVERY);
776 ag = pg->pg_discovery_auth_group;
777 if (ag->ag_name != NULL) {
778 log_debugx("initiator requests "
779 "discovery session; auth-group \"%s\"", ag->ag_name);
781 log_debugx("initiator requests discovery session");
786 * Enforce initiator-name and initiator-portal.
788 if (auth_name_check(ag, initiator_name) != 0) {
789 login_send_error(request, 0x02, 0x02);
790 log_errx(1, "initiator does not match allowed initiator names");
793 if (auth_portal_check(ag, &conn->conn_initiator_sa) != 0) {
794 login_send_error(request, 0x02, 0x02);
795 log_errx(1, "initiator does not match allowed "
796 "initiator portals");
800 * Let's see if the initiator intends to do any kind of authentication
803 if (login_csg(request) == BHSLR_STAGE_OPERATIONAL_NEGOTIATION) {
804 if (ag->ag_type != AG_TYPE_NO_AUTHENTICATION) {
805 login_send_error(request, 0x02, 0x01);
806 log_errx(1, "initiator skipped the authentication, "
807 "but authentication is required");
810 keys_delete(request_keys);
812 log_debugx("initiator skipped the authentication, "
813 "and we don't need it; proceeding with negotiation");
814 login_negotiate(conn, request);
818 if (ag->ag_type == AG_TYPE_NO_AUTHENTICATION) {
820 * Initiator might want to to authenticate,
821 * but we don't need it.
823 log_debugx("authentication not required; "
824 "transitioning to operational parameter negotiation");
826 if ((bhslr->bhslr_flags & BHSLR_FLAGS_TRANSIT) == 0)
827 log_warnx("initiator did not set the \"T\" flag; "
828 "transitioning anyway");
830 response = login_new_response(request);
831 bhslr2 = (struct iscsi_bhs_login_response *)response->pdu_bhs;
832 bhslr2->bhslr_flags |= BHSLR_FLAGS_TRANSIT;
833 login_set_nsg(response, BHSLR_STAGE_OPERATIONAL_NEGOTIATION);
834 response_keys = keys_new();
836 * Required by Linux initiator.
838 auth_method = keys_find(request_keys, "AuthMethod");
839 if (auth_method != NULL &&
840 login_list_contains(auth_method, "None"))
841 keys_add(response_keys, "AuthMethod", "None");
843 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
844 if (conn->conn_target->t_alias != NULL)
845 keys_add(response_keys,
846 "TargetAlias", conn->conn_target->t_alias);
847 keys_add_int(response_keys,
848 "TargetPortalGroupTag", pg->pg_tag);
850 keys_save(response_keys, response);
852 pdu_delete(response);
853 keys_delete(response_keys);
855 keys_delete(request_keys);
857 login_negotiate(conn, NULL);
861 if (ag->ag_type == AG_TYPE_DENY) {
862 login_send_error(request, 0x02, 0x01);
863 log_errx(1, "auth-type is \"deny\"");
866 if (ag->ag_type == AG_TYPE_UNKNOWN) {
868 * This can happen with empty auth-group.
870 login_send_error(request, 0x02, 0x01);
871 log_errx(1, "auth-type not set, denying access");
874 log_debugx("CHAP authentication required");
876 auth_method = keys_find(request_keys, "AuthMethod");
877 if (auth_method == NULL) {
878 login_send_error(request, 0x02, 0x07);
879 log_errx(1, "received Login PDU without AuthMethod");
882 * XXX: This should be Reject, not just a login failure (5.3.2).
884 if (login_list_contains(auth_method, "CHAP") == 0) {
885 login_send_error(request, 0x02, 0x01);
886 log_errx(1, "initiator requests unsupported AuthMethod \"%s\" "
887 "instead of \"CHAP\"", auth_method);
890 response = login_new_response(request);
892 response_keys = keys_new();
893 keys_add(response_keys, "AuthMethod", "CHAP");
894 if (conn->conn_session_type == CONN_SESSION_TYPE_NORMAL) {
895 if (conn->conn_target->t_alias != NULL)
896 keys_add(response_keys,
897 "TargetAlias", conn->conn_target->t_alias);
898 keys_add_int(response_keys,
899 "TargetPortalGroupTag", pg->pg_tag);
901 keys_save(response_keys, response);
904 pdu_delete(response);
905 keys_delete(response_keys);
907 keys_delete(request_keys);
909 login_chap(conn, ag);
911 login_negotiate(conn, NULL);