2 * Copyright (c) 2005-2008 Daniel Braniss <danny@cs.huji.ac.il>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 | $Id: login.c,v 1.4 2007/04/27 07:40:40 danny Exp danny $
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <sys/sysctl.h>
36 #include <netinet/in.h>
37 #include <netinet/tcp.h>
38 #include <arpa/inet.h>
39 #if __FreeBSD_version < 500000
42 #include <sys/ioctl.h>
48 #include "iscontrol.h"
50 static char *status_class1[] = {
52 "Authentication failure",
53 "Authorization failure",
56 "Unsupported version",
57 "Too many connections",
59 "Can't include in session",
60 "Session type not suported",
61 "Session does not exist",
62 "Invalid during login",
64 #define CLASS1_ERRS ((sizeof status_class1) / sizeof(char *))
66 static char *status_class3[] = {
68 "Service unavailable",
71 #define CLASS3_ERRS ((sizeof status_class3) / sizeof(char *))
74 selectFrom(char *str, token_t *list)
82 sep = strchr(sp, ',');
88 for(lp = list; lp->name != NULL; lp++) {
89 if(strncasecmp(lp->name, sp, n) == 0)
90 return strdup(lp->name);
99 getkeyval(char *key, pdu_t *pp)
107 ptr = (char *)pp->ds;
110 if(strncmp(key, ptr, klen) == 0)
120 handleTgtResp(isess_t *sess, pdu_t *pp)
122 isc_opt_t *op = sess->op;
123 char *np, *rp, *d1, *d2;
127 if(((np = getkeyval("CHAP_N=", pp)) == NULL) ||
128 ((rp = getkeyval("CHAP_R=", pp)) == NULL))
130 if(strcmp(np, op->tgtChapName? op->tgtChapName: op->initiatorName) != 0) {
131 fprintf(stderr, "%s does not match\n", np);
134 l1 = str2bin(op->tgtChapDigest, &d1);
135 l2 = str2bin(rp, &d2);
137 debug(3, "l1=%d '%s' l2=%d '%s'", l1, op->tgtChapDigest, l2, rp);
138 if(l1 == l2 && memcmp(d1, d2, l1) == 0)
145 free(op->tgtChapDigest);
146 op->tgtChapDigest = NULL;
148 debug(3, "res=%d", res);
154 processParams(isess_t *sess, pdu_t *pp)
156 isc_opt_t *op = sess->op;
163 ptr = (char *)pp->ds;
166 printf("got: len=%d %s\n", len, ptr);
168 if((eq = strchr(ptr, '=')) != NULL)
171 if(strncmp(ptr, "TargetAddress", klen) == 0) {
172 char *p, *q, *ta = NULL;
174 // TargetAddress=domainname[:port][,portal-group-tag]
175 // XXX: if(op->targetAddress) free(op->targetAddress);
176 q = op->targetAddress = strdup(eq+1);
179 if((q = strchr(q, ']')) != NULL) {
181 ta = op->targetAddress;
182 op->targetAddress = strdup(ta+1);
184 q = op->targetAddress;
186 if((p = strchr(q, ',')) != NULL) {
188 op->targetPortalGroupTag = atoi(p);
190 if((p = strchr(q, ':')) != NULL) {
196 } else if(strncmp(ptr, "MaxRecvDataSegmentLength", klen) == 0) {
198 op->maxXmitDataSegmentLength = strtol(eq+1, NULL, 0);
199 } else if(strncmp(ptr, "TargetPortalGroupTag", klen) == 0) {
200 op->targetPortalGroupTag = strtol(eq+1, NULL, 0);
201 } else if(strncmp(ptr, "HeaderDigest", klen) == 0) {
202 op->headerDigest = selectFrom(eq+1, DigestMethods);
203 } else if(strncmp(ptr, "DataDigest", klen) == 0) {
204 op->dataDigest = selectFrom(eq+1, DigestMethods);
205 } else if(strncmp(ptr, "MaxOutstandingR2T", klen) == 0)
206 op->maxOutstandingR2T = strtol(eq+1, NULL, 0);
209 for(kp = keyMap; kp->name; kp++) {
210 if(strncmp(ptr, kp->name, kp->len) == 0 && ptr[kp->len] == '=')
211 mp->func(sess, ptr+kp->len+1, GET);
223 handleLoginResp(isess_t *sess, pdu_t *pp)
225 login_rsp_t *lp = (login_rsp_t *)pp;
226 uint st_class, status = ntohs(lp->status);
229 debug(4, "Tbit=%d csg=%d nsg=%d status=%x", lp->T, lp->CSG, lp->NSG, status);
231 st_class = status >> 8;
233 unsigned int st_detail = status & 0xff;
238 // the ITN (iSCSI target Name) requests a:
239 case 1: // temporary address change
240 case 2: // permanent address change
245 case 2: // Initiator Error
246 if(st_detail < CLASS1_ERRS)
247 printf("0x%04x: %s\n", status, status_class1[st_detail]);
251 if(st_detail < CLASS3_ERRS)
252 printf("0x%04x: %s\n", status, status_class3[st_detail]);
258 processParams(sess, pp);
259 setOptions(sess, 0); // XXX: just in case ...
262 isc_opt_t *op = sess->op;
264 if(sess->csg == SN_PHASE && (op->tgtChapDigest != NULL))
265 if(handleTgtResp(sess, pp) != 0)
266 return 1; // XXX: Authentication failure ...
268 if(sess->csg == FF_PHASE) {
269 // XXX: will need this when implementing reconnect.
270 sess->tsih = lp->tsih;
271 debug(2, "TSIH=%x", sess->tsih);
280 handleChap(isess_t *sess, pdu_t *pp)
284 isc_opt_t *op = sess->op;
285 char *ap, *ip, *cp, *digest; // MD5 is 128bits, SHA1 160bits
289 bzero(&spp, sizeof(pdu_t));
290 lp = (login_req_t *)&spp.ipdu.bhs;
291 lp->cmd = ISCSI_LOGIN_CMD | 0x40; // login request + Inmediate
292 memcpy(lp->isid, sess->isid, 6);
293 lp->tsih = sess->tsih; // MUST be zero the first time!
295 lp->CSG = SN_PHASE; // Security Negotiation
299 if(((ap = getkeyval("CHAP_A=", pp)) == NULL) ||
300 ((ip = getkeyval("CHAP_I=", pp)) == NULL) ||
301 ((cp = getkeyval("CHAP_C=", pp)) == NULL))
304 if((digest = chapDigest(ap, (char)strtol(ip, NULL, 0), cp, op->chapSecret)) == NULL)
307 addText(&spp, "CHAP_N=%s", op->chapIName? op->chapIName: op->initiatorName);
308 addText(&spp, "CHAP_R=%s", digest);
311 if(op->tgtChapSecret != NULL) {
312 op->tgtChapID = (random() >> 24) % 255; // should be random enough ...
313 addText(&spp, "CHAP_I=%d", op->tgtChapID);
314 cp = genChapChallenge(cp, op->tgtChallengeLen? op->tgtChallengeLen: 8);
315 addText(&spp, "CHAP_C=%s", cp);
316 op->tgtChapDigest = chapDigest(ap, op->tgtChapID, cp, op->tgtChapSecret);
319 return sendPDU(sess, &spp, handleLoginResp);
323 authenticate(isess_t *sess)
327 isc_opt_t *op = sess->op;
329 bzero(&spp, sizeof(pdu_t));
330 lp = (login_req_t *)&spp.ipdu.bhs;
331 lp->cmd = ISCSI_LOGIN_CMD | 0x40; // login request + Inmediate
332 memcpy(lp->isid, sess->isid, 6);
333 lp->tsih = sess->tsih; // MUST be zero the first time!
335 lp->CSG = SN_PHASE; // Security Negotiation
339 switch((authm_t)lookup(AuthMethods, op->authMethod)) {
350 if(op->chapDigest == 0)
351 addText(&spp, "CHAP_A=5");
353 if(strcmp(op->chapDigest, "MD5") == 0)
354 addText(&spp, "CHAP_A=5");
356 if(strcmp(op->chapDigest, "SHA1") == 0)
357 addText(&spp, "CHAP_A=7");
359 addText(&spp, "CHAP_A=5,7");
360 return sendPDU(sess, &spp, handleChap);
366 loginPhase(isess_t *sess)
368 pdu_t spp, *sp = &spp;
369 isc_opt_t *op = sess->op;
375 bzero(sp, sizeof(pdu_t));
376 lp = (login_req_t *)&spp.ipdu.bhs;
377 lp->cmd = ISCSI_LOGIN_CMD | 0x40; // login request + Inmediate
378 memcpy(lp->isid, sess->isid, 6);
379 lp->tsih = sess->tsih; // MUST be zero the first time!
380 lp->CID = htons(1); // sess->cid?
382 if((lp->CSG = sess->csg) == LON_PHASE)
383 lp->NSG = FF_PHASE; // lets try and go full feature ...
386 lp->T = 1; // transit to next login stage
388 if(sess->flags & SESS_INITIALLOGIN1) {
389 sess->flags &= ~SESS_INITIALLOGIN1;
391 addText(sp, "SessionType=%s", op->sessionType);
392 addText(sp, "InitiatorName=%s", op->initiatorName);
393 if(strcmp(op->sessionType, "Discovery") != 0) {
394 addText(sp, "TargetName=%s", op->targetName);
398 case SN_PHASE: // Security Negotiation
399 addText(sp, "AuthMethod=%s", op->authMethod);
402 case LON_PHASE: // Login Operational Negotiation
403 if((sess->flags & SESS_NEGODONE) == 0) {
404 sess->flags |= SESS_NEGODONE;
405 addText(sp, "MaxBurstLength=%d", op->maxBurstLength);
406 addText(sp, "HeaderDigest=%s", op->headerDigest);
407 addText(sp, "DataDigest=%s", op->dataDigest);
408 addText(sp, "MaxRecvDataSegmentLength=%d", op->maxRecvDataSegmentLength);
409 addText(sp, "ErrorRecoveryLevel=%d", op->errorRecoveryLevel);
410 addText(sp, "DefaultTime2Wait=%d", op->defaultTime2Wait);
411 addText(sp, "DefaultTime2Retain=%d", op->defaultTime2Retain);
412 addText(sp, "DataPDUInOrder=%s", op->dataPDUInOrder? "Yes": "No");
413 addText(sp, "DataSequenceInOrder=%s", op->dataSequenceInOrder? "Yes": "No");
414 addText(sp, "MaxOutstandingR2T=%d", op->maxOutstandingR2T);
416 if(strcmp(op->sessionType, "Discovery") != 0) {
417 addText(sp, "MaxConnections=%d", op->maxConnections);
418 addText(sp, "FirstBurstLength=%d", op->firstBurstLength);
419 addText(sp, "InitialR2T=%s", op->initialR2T? "Yes": "No");
420 addText(sp, "ImmediateData=%s", op->immediateData? "Yes": "No");
427 status = sendPDU(sess, &spp, handleLoginResp);
430 case 0: // all is ok ...
431 if(sess->csg == SN_PHASE)
433 | if we are still here, then we need
434 | to exchange some secrets ...
436 status = authenticate(sess);