1 /*
2 * Copyright (c) 1990,1993 Regents of The University of Michigan.
3 * All Rights Reserved. See COPYRIGHT.
4 */
5
6 #ifdef HAVE_CONFIG_H
7 #include "config.h"
8 #endif /* HAVE_CONFIG_H */
9
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <errno.h>
13 #include <unistd.h>
14 #include <sys/types.h>
15 #include <sys/param.h>
16 #include <sys/stat.h>
17 #include <arpa/inet.h>
18
19 #include <atalk/afp.h>
20 #include <atalk/compat.h>
21 #include <atalk/util.h>
22 #include <limits.h>
23 #include <string.h>
24 #include <ctype.h>
25 #include <time.h>
26 #include <pwd.h>
27 #include <grp.h>
28
29 #ifdef TRU64
30 #include <netdb.h>
31 #include <arpa/inet.h>
32 #include <sia.h>
33 #include <siad.h>
34
35 extern void afp_get_cmdline( int *ac, char ***av );
36 #endif /* TRU64 */
37
38 #include <atalk/logger.h>
39 #include <atalk/server_ipc.h>
40 #include <atalk/uuid.h>
41 #include <atalk/globals.h>
42 #include <atalk/fce_api.h>
43 #include <atalk/spotlight.h>
44 #include <atalk/unix.h>
45
46 #include "auth.h"
47 #include "uam_auth.h"
48 #include "switch.h"
49 #include "status.h"
50 #include "fork.h"
51 #include "extattrs.h"
52 #ifdef HAVE_ACLS
53 #include "acls.h"
54 #endif
55
56 static int afp_version_index;
57 static struct uam_mod uam_modules = {NULL, NULL, &uam_modules, &uam_modules};
58 static struct uam_obj uam_login = {"", "", 0, {{NULL, NULL, NULL, NULL }}, &uam_login,
59 &uam_login};
60 static struct uam_obj uam_changepw = {"", "", 0, {{NULL, NULL, NULL, NULL}}, &uam_changepw,
61 &uam_changepw};
62
63 static struct uam_obj *afp_uam = NULL;
64
65
status_versions(char * data,const DSI * dsi)66 void status_versions( char *data, const DSI *dsi)
67 {
68 char *start = data;
69 uint16_t status;
70 int len, num, i, count = 0;
71
72 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status));
73 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] );
74
75 for ( i = 0; i < num; i++ ) {
76 if ( !dsi && (afp_versions[ i ].av_number >= 22)) continue;
77 count++;
78 }
79 data += ntohs( status );
80 *data++ = count;
81
82 for ( i = 0; i < num; i++ ) {
83 if ( !dsi && (afp_versions[ i ].av_number >= 22)) continue;
84 len = strlen( afp_versions[ i ].av_name );
85 *data++ = len;
86 memcpy( data, afp_versions[ i ].av_name , len );
87 data += len;
88 }
89 status = htons( data - start );
90 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status));
91 }
92
status_uams(char * data,const char * authlist)93 void status_uams(char *data, const char *authlist)
94 {
95 char *start = data;
96 uint16_t status;
97 struct uam_obj *uams;
98 int len, num = 0;
99
100 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status));
101 uams = &uam_login;
102 while ((uams = uams->uam_prev) != &uam_login) {
103 if (strstr(authlist, uams->uam_path))
104 num++;
105 }
106
107 data += ntohs( status );
108 *data++ = num;
109 while ((uams = uams->uam_prev) != &uam_login) {
110 if (strstr(authlist, uams->uam_path)) {
111 LOG(log_info, logtype_afpd, "uam: \"%s\" available", uams->uam_name);
112 len = strlen( uams->uam_name);
113 *data++ = len;
114 memcpy( data, uams->uam_name, len );
115 data += len;
116 }
117 }
118
119 /* icon offset */
120 status = htons(data - start);
121 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status));
122 }
123
124 /* handle errors by closing the connection. this is only needed
125 * by the afp_* functions. */
send_reply(const AFPObj * obj,const int err)126 static int send_reply(const AFPObj *obj, const int err)
127 {
128 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT))
129 return err;
130
131 obj->reply(obj->dsi, err);
132 obj->exit(0);
133
134 return AFP_OK;
135 }
136
afp_errpwdexpired(AFPObj * obj _U_,char * ibuf _U_,size_t ibuflen _U_,char * rbuf _U_,size_t * rbuflen)137 static int afp_errpwdexpired(AFPObj *obj _U_, char *ibuf _U_, size_t ibuflen _U_,
138 char *rbuf _U_, size_t *rbuflen)
139 {
140 *rbuflen = 0;
141 return AFPERR_PWDEXPR;
142 }
143
afp_null_nolog(AFPObj * obj _U_,char * ibuf _U_,size_t ibuflen _U_,char * rbuf _U_,size_t * rbuflen)144 static int afp_null_nolog(AFPObj *obj _U_, char *ibuf _U_, size_t ibuflen _U_,
145 char *rbuf _U_, size_t *rbuflen)
146 {
147 *rbuflen = 0;
148 return( AFPERR_NOOP );
149 }
150
set_auth_switch(const AFPObj * obj,int expired)151 static int set_auth_switch(const AFPObj *obj, int expired)
152 {
153 int i;
154
155 if (expired) {
156 /*
157 * BF: expired password handling
158 * to allow the user to change his/her password we have to allow login
159 * but every following call except for FPChangePassword will be thrown
160 * away with an AFPERR_PWDEXPR error. (thanks to Leland Wallace from Apple
161 * for clarifying this)
162 */
163
164 for (i=0; i<=0xff; i++) {
165 uam_afpserver_action(i, UAM_AFPSERVER_PREAUTH, afp_errpwdexpired, NULL);
166 }
167 uam_afpserver_action(AFP_LOGOUT, UAM_AFPSERVER_PREAUTH, afp_logout, NULL);
168 uam_afpserver_action(AFP_CHANGEPW, UAM_AFPSERVER_PREAUTH, afp_changepw, NULL);
169 }
170 else {
171 afp_switch = postauth_switch;
172 switch (obj->afp_version) {
173
174 case 34:
175 case 33:
176 case 32:
177 #ifdef HAVE_ACLS
178 uam_afpserver_action(AFP_GETACL, UAM_AFPSERVER_POSTAUTH, afp_getacl, NULL);
179 uam_afpserver_action(AFP_SETACL, UAM_AFPSERVER_POSTAUTH, afp_setacl, NULL);
180 uam_afpserver_action(AFP_ACCESS, UAM_AFPSERVER_POSTAUTH, afp_access, NULL);
181 #endif /* HAVE_ACLS */
182 uam_afpserver_action(AFP_GETEXTATTR, UAM_AFPSERVER_POSTAUTH, afp_getextattr, NULL);
183 uam_afpserver_action(AFP_SETEXTATTR, UAM_AFPSERVER_POSTAUTH, afp_setextattr, NULL);
184 uam_afpserver_action(AFP_REMOVEATTR, UAM_AFPSERVER_POSTAUTH, afp_remextattr, NULL);
185 uam_afpserver_action(AFP_LISTEXTATTR, UAM_AFPSERVER_POSTAUTH, afp_listextattr, NULL);
186
187 case 31:
188 uam_afpserver_action(AFP_SYNCDIR, UAM_AFPSERVER_POSTAUTH, afp_syncdir, NULL);
189 uam_afpserver_action(AFP_SYNCFORK, UAM_AFPSERVER_POSTAUTH, afp_syncfork, NULL);
190 #ifdef HAVE_TRACKER
191 uam_afpserver_action(AFP_SPOTLIGHT_PRIVATE, UAM_AFPSERVER_POSTAUTH, afp_spotlight_rpc, NULL);
192 #endif
193 uam_afpserver_action(AFP_ENUMERATE_EXT2, UAM_AFPSERVER_POSTAUTH, afp_enumerate_ext2, NULL);
194
195 case 30:
196 uam_afpserver_action(AFP_ENUMERATE_EXT, UAM_AFPSERVER_POSTAUTH, afp_enumerate_ext, NULL);
197 uam_afpserver_action(AFP_BYTELOCK_EXT, UAM_AFPSERVER_POSTAUTH, afp_bytelock_ext, NULL);
198 /* catsearch_ext uses the same packet as catsearch FIXME double check this, it wasn't true for enue
199 enumerate_ext */
200 uam_afpserver_action(AFP_CATSEARCH_EXT, UAM_AFPSERVER_POSTAUTH, afp_catsearch_ext, NULL);
201 uam_afpserver_action(AFP_GETSESSTOKEN, UAM_AFPSERVER_POSTAUTH, afp_getsession, NULL);
202 uam_afpserver_action(AFP_READ_EXT, UAM_AFPSERVER_POSTAUTH, afp_read_ext, NULL);
203 uam_afpserver_action(AFP_WRITE_EXT, UAM_AFPSERVER_POSTAUTH, afp_write_ext, NULL);
204 uam_afpserver_action(AFP_DISCTOLDSESS, UAM_AFPSERVER_POSTAUTH, afp_disconnect, NULL);
205
206 case 22:
207 /*
208 * If first connection to a server is done in classic AFP2.2 version is used
209 * but OSX uses AFP3.x FPzzz command !
210 */
211 uam_afpserver_action(AFP_ZZZ, UAM_AFPSERVER_POSTAUTH, afp_zzz, NULL);
212 break;
213 }
214 }
215
216 return AFP_OK;
217 }
218
login(AFPObj * obj,struct passwd * pwd,void (* logout)(void),int expired)219 static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void), int expired)
220 {
221 bool admin = false;
222 int i;
223
224 if ( pwd->pw_uid == 0 ) { /* don't allow root login */
225 LOG(log_error, logtype_afpd, "login: root login denied!" );
226 return AFPERR_NOTAUTH;
227 }
228
229 if (obj->cnx_cnt > obj->cnx_max) {
230 LOG(log_error, logtype_dsi, "login: too many connections, limit: %d", obj->cnx_max);
231 return AFPERR_MAXSESS;
232 }
233
234 LOG(log_note, logtype_afpd, "Login by %s (%s)",
235 pwd->pw_name, afp_versions[afp_version_index].av_name);
236
237 if (set_groups(obj, pwd) != 0)
238 return AFPERR_BADUAM;
239
240 LOG(log_debug, logtype_afpd, "obj->options.admingid == %d", obj->options.admingid);
241
242 if (obj->options.admingid != 0) {
243 for (i = 0; i < obj->ngroups; i++) {
244 if (obj->groups[i] == obj->options.admingid) {
245 admin = true;
246 }
247 }
248 }
249 if (admin) {
250 ad_setfuid(0);
251 LOG(log_info, logtype_afpd, "admin login -- %s", pwd->pw_name );
252 } else {
253 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) {
254 LOG(log_error, logtype_afpd, "login: %s %s", pwd->pw_name, strerror(errno) );
255 return AFPERR_BADUAM;
256 }
257 }
258
259 if (obj->options.force_user) {
260 if (seteuid(obj->options.force_uid) < 0) {
261 LOG(log_error, logtype_afpd, "login: %s %s", pwd->pw_name, strerror(errno));
262 return AFPERR_BADUAM;
263 }
264 LOG(log_info, logtype_afpd, "login: force uid: %ju", (uintmax_t)obj->options.force_uid);
265 }
266
267 if (obj->options.force_group) {
268 if (setegid(obj->options.force_gid) < 0) {
269 LOG(log_error, logtype_afpd, "login: %s %s", pwd->pw_name, strerror(errno));
270 return AFPERR_BADUAM;
271 }
272 LOG(log_info, logtype_afpd, "login: force gid: %ju", (uintmax_t)obj->options.force_gid);
273 }
274
275 LOG(log_debug, logtype_afpd, "login: supplementary groups: %s", print_groups(obj->ngroups, obj->groups));
276
277 set_auth_switch(obj, expired);
278 obj->logout = logout;
279 obj->uid = pwd->pw_uid;
280 obj->euid = geteuid();
281
282 /* pam_umask or similar might have changed our umask */
283 (void)umask(obj->options.umask);
284
285 /* Some PAM module might have reset our signal handlers and timer, so we need to reestablish them */
286 afp_over_dsi_sighandlers(obj);
287
288 /* Send FCE login event */
289 fce_register(obj, FCE_LOGIN, "", NULL);
290
291 return( AFP_OK );
292 }
293
294 /* ---------------------- */
afp_zzz(AFPObj * obj,char * ibuf,size_t ibuflen,char * rbuf,size_t * rbuflen)295 int afp_zzz(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen)
296 {
297 uint32_t data;
298 DSI *dsi = (DSI *)AFPobj->dsi;
299
300 *rbuflen = 0;
301 ibuf += 2;
302 ibuflen -= 2;
303
304 if (ibuflen < 4)
305 return AFPERR_MISC;
306 memcpy(&data, ibuf, 4); /* flag */
307 data = ntohl(data);
308
309 /*
310 * Possible sleeping states:
311 * 1) normal sleep: DSI_SLEEPING (up to 10.3)
312 * 2) extended sleep: DSI_SLEEPING | DSI_EXTSLEEP (starting with 10.4)
313 */
314
315 if (data & AFPZZZ_EXT_WAKEUP) {
316 /* wakeup request from exetended sleep */
317 if (dsi->flags & DSI_EXTSLEEP) {
318 LOG(log_note, logtype_afpd, "afp_zzz: waking up from extended sleep");
319 dsi->flags &= ~(DSI_SLEEPING | DSI_EXTSLEEP);
320 ipc_child_state(obj, DSI_RUNNING);
321 }
322 } else {
323 /* sleep request */
324 dsi->flags |= DSI_SLEEPING;
325 if (data & AFPZZZ_EXT_SLEEP) {
326 LOG(log_note, logtype_afpd, "afp_zzz: entering extended sleep");
327 dsi->flags |= DSI_EXTSLEEP;
328 ipc_child_state(obj, DSI_EXTSLEEP);
329 } else {
330 LOG(log_note, logtype_afpd, "afp_zzz: entering normal sleep");
331 ipc_child_state(obj, DSI_SLEEPING);
332 }
333 }
334
335 /*
336 * According to AFP 3.3 spec we should not return anything,
337 * but eg 10.5.8 server still returns the numbers of hours
338 * the server is keeping the sessino (ie max sleeptime).
339 */
340 data = obj->options.sleep / 120; /* hours */
341 if (!data) {
342 data = 1;
343 }
344 *rbuflen = sizeof(data);
345 data = htonl(data);
346 memcpy(rbuf, &data, sizeof(data));
347 rbuf += sizeof(data);
348
349 return AFP_OK;
350 }
351
352 /* ---------------------- */
create_session_token(AFPObj * obj)353 static int create_session_token(AFPObj *obj)
354 {
355 pid_t pid;
356
357 /* use 8 bytes for token as OSX, don't know if it helps */
358 if ( sizeof(pid_t) > SESSIONTOKEN_LEN) {
359 LOG(log_error, logtype_afpd, "sizeof(pid_t) > %u", SESSIONTOKEN_LEN );
360 return AFPERR_MISC;
361 }
362
363 if ( NULL == (obj->sinfo.sessiontoken = malloc(SESSIONTOKEN_LEN)) )
364 return AFPERR_MISC;
365
366 memset(obj->sinfo.sessiontoken, 0, SESSIONTOKEN_LEN);
367 obj->sinfo.sessiontoken_len = SESSIONTOKEN_LEN;
368 pid = getpid();
369 memcpy(obj->sinfo.sessiontoken, &pid, sizeof(pid_t));
370
371 return 0;
372 }
373
create_session_key(AFPObj * obj)374 static int create_session_key(AFPObj *obj)
375 {
376 /* create session key */
377 if (obj->sinfo.sessionkey == NULL) {
378 if (NULL == (obj->sinfo.sessionkey = malloc(SESSIONKEY_LEN)) )
379 return AFPERR_MISC;
380 uam_random_string(obj, obj->sinfo.sessionkey, SESSIONKEY_LEN);
381 obj->sinfo.sessionkey_len = SESSIONKEY_LEN;
382 }
383 return AFP_OK;
384 }
385
386
387 /* ---------------------- */
afp_getsession(AFPObj * obj,char * ibuf,size_t ibuflen,char * rbuf,size_t * rbuflen)388 int afp_getsession(
389 AFPObj *obj,
390 char *ibuf, size_t ibuflen,
391 char *rbuf, size_t *rbuflen)
392 {
393 uint16_t type;
394 uint32_t idlen = 0;
395 uint32_t boottime;
396 uint32_t tklen, tp;
397 char *token;
398 char *p;
399
400 *rbuflen = 0;
401 tklen = 0;
402
403 if (ibuflen < 2 + sizeof(type)) {
404 return AFPERR_PARAM;
405 }
406
407 ibuf += 2;
408 ibuflen -= 2;
409
410 memcpy(&type, ibuf, sizeof(type));
411 type = ntohs(type);
412 ibuf += sizeof(type);
413 ibuflen -= sizeof(type);
414
415 if ( obj->sinfo.sessiontoken == NULL ) {
416 if ( create_session_token( obj ) )
417 return AFPERR_MISC;
418 }
419
420 /*
421 *
422 */
423 switch (type) {
424 case 0: /* old version ?*/
425 tklen = obj->sinfo.sessiontoken_len;
426 token = obj->sinfo.sessiontoken;
427 break;
428 case 1: /* disconnect */
429 case 2: /* reconnect update id */
430 if (ibuflen >= sizeof(idlen)) {
431 memcpy(&idlen, ibuf, sizeof(idlen));
432 idlen = ntohl(idlen);
433 ibuf += sizeof(idlen);
434 ibuflen -= sizeof(idlen);
435 if (ibuflen < idlen) {
436 return AFPERR_PARAM;
437 }
438 /* memcpy (id, ibuf, idlen) */
439 tklen = obj->sinfo.sessiontoken_len;
440 token = obj->sinfo.sessiontoken;
441 }
442 break;
443 case 3:
444 case 4:
445 if (ibuflen >= 8 ) {
446 p = ibuf;
447 memcpy( &idlen, ibuf, sizeof(idlen));
448 idlen = ntohl(idlen);
449 ibuf += sizeof(idlen);
450 ibuflen -= sizeof(idlen);
451 ibuf += sizeof(boottime);
452 ibuflen -= sizeof(boottime);
453 if (ibuflen < idlen || idlen > (90-10)) {
454 return AFPERR_PARAM;
455 }
456 if (!obj->sinfo.clientid) {
457 obj->sinfo.clientid = malloc(idlen + 8);
458 memcpy(obj->sinfo.clientid, p, idlen + 8);
459 obj->sinfo.clientid_len = idlen + 8;
460 }
461 if (ipc_child_write(obj->ipc_fd, IPC_GETSESSION, idlen+8, p) != 0)
462 return AFPERR_MISC;
463 tklen = obj->sinfo.sessiontoken_len;
464 token = obj->sinfo.sessiontoken;
465 }
466 break;
467 case 8: /* Panther Kerberos Token */
468 tklen = obj->sinfo.cryptedkey_len;
469 token = obj->sinfo.cryptedkey;
470 break;
471 default:
472 return AFPERR_NOOP;
473 break;
474
475 }
476
477 if (tklen == 0)
478 return AFPERR_MISC;
479
480 tp = htonl(tklen);
481 memcpy(rbuf, &tp, sizeof(tklen));
482 rbuf += sizeof(tklen);
483 *rbuflen += sizeof(tklen);
484
485 memcpy(rbuf, token, tklen);
486 *rbuflen += tklen;
487
488 return AFP_OK;
489 }
490
491 /* ---------------------- */
afp_disconnect(AFPObj * obj,char * ibuf,size_t ibuflen _U_,char * rbuf _U_,size_t * rbuflen)492 int afp_disconnect(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size_t *rbuflen)
493 {
494 DSI *dsi = (DSI *)obj->dsi;
495 uint16_t type;
496 uint32_t tklen;
497 pid_t token;
498 int i;
499
500 *rbuflen = 0;
501 ibuf += 2;
502
503 #if 0
504 /* check for guest user */
505 if ( 0 == (strcasecmp(obj->username, obj->options.guest)) ) {
506 return AFPERR_MISC;
507 }
508 #endif
509
510 memcpy(&type, ibuf, sizeof(type));
511 type = ntohs(type);
512 ibuf += sizeof(type);
513
514 memcpy(&tklen, ibuf, sizeof(tklen));
515 tklen = ntohl(tklen);
516 ibuf += sizeof(tklen);
517
518 if ( sizeof(pid_t) > SESSIONTOKEN_LEN) {
519 LOG(log_error, logtype_afpd, "sizeof(pid_t) > %u", SESSIONTOKEN_LEN );
520 return AFPERR_MISC;
521 }
522 if (tklen != SESSIONTOKEN_LEN) {
523 return AFPERR_MISC;
524 }
525 tklen = sizeof(pid_t);
526 memcpy(&token, ibuf, tklen);
527
528 /* our stuff is pid + zero pad */
529 ibuf += tklen;
530 for (i = tklen; i < SESSIONTOKEN_LEN; i++, ibuf++) {
531 if (*ibuf != 0) {
532 return AFPERR_MISC;
533 }
534 }
535
536 LOG(log_note, logtype_afpd, "afp_disconnect: trying primary reconnect");
537 dsi->flags |= DSI_RECONINPROG;
538
539 /* Deactivate tickle timer */
540 const struct itimerval none = {{0, 0}, {0, 0}};
541 setitimer(ITIMER_REAL, &none, NULL);
542
543 /* check for old session, possibly transferring session from here to there */
544 if (ipc_child_write(obj->ipc_fd, IPC_DISCOLDSESSION, tklen, &token) != 0)
545 goto exit;
546 /* write uint16_t DSI request ID */
547 if (writet(obj->ipc_fd, &dsi->header.dsi_requestID, 2, 0, 2) != 2) {
548 LOG(log_error, logtype_afpd, "afp_disconnect: couldn't send DSI request ID");
549 goto exit;
550 }
551 /* now send our connected AFP client socket */
552 if (send_fd(obj->ipc_fd, dsi->socket) != 0)
553 goto exit;
554 /* Now see what happens: either afpd master sends us SIGTERM because our session */
555 /* has been transferred to a old disconnected session, or we continue */
556 sleep(5);
557
558 if (!(dsi->flags & DSI_RECONINPROG)) { /* deleted in SIGTERM handler */
559 /* Reconnect succeeded, we exit now after sleeping some more */
560 sleep(2); /* sleep some more to give the recon. session time */
561 LOG(log_note, logtype_afpd, "afp_disconnect: primary reconnect succeeded");
562 exit(0);
563 }
564
565 exit:
566 /* Reinstall tickle timer */
567 setitimer(ITIMER_REAL, &dsi->timer, NULL);
568
569 LOG(log_error, logtype_afpd, "afp_disconnect: primary reconnect failed");
570 return AFPERR_MISC;
571 }
572
573 /* ---------------------- */
get_version(AFPObj * obj,char * ibuf,size_t ibuflen,size_t len)574 static int get_version(AFPObj *obj, char *ibuf, size_t ibuflen, size_t len)
575 {
576 int num,i;
577
578 if (!len || len > ibuflen)
579 return AFPERR_BADVERS;
580
581 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]);
582 for ( i = 0; i < num; i++ ) {
583 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) {
584 obj->afp_version = afp_versions[ i ].av_number;
585 afp_version_index = i;
586 break;
587 }
588 }
589 if ( i == num ) /* An inappropo version */
590 return AFPERR_BADVERS ;
591
592 /* FIXME Hack */
593 if (obj->afp_version >= 30 && sizeof(off_t) != 8) {
594 LOG(log_error, logtype_afpd, "get_version: no LARGE_FILE support recompile!" );
595 return AFPERR_BADVERS ;
596 }
597
598 return 0;
599 }
600
601 /* ---------------------- */
afp_login(AFPObj * obj,char * ibuf,size_t ibuflen,char * rbuf,size_t * rbuflen)602 int afp_login(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen)
603 {
604 struct passwd *pwd = NULL;
605 size_t len;
606 int i;
607
608 *rbuflen = 0;
609
610 if ( nologin & 1)
611 return send_reply(obj, AFPERR_SHUTDOWN );
612
613 if (ibuflen < 2)
614 return send_reply(obj, AFPERR_BADVERS );
615
616 ibuf++;
617 len = (unsigned char) *ibuf++;
618 ibuflen -= 2;
619
620 i = get_version(obj, ibuf, ibuflen, len);
621 if (i)
622 return send_reply(obj, i );
623
624 if (ibuflen <= len)
625 return send_reply(obj, AFPERR_BADUAM);
626
627 ibuf += len;
628 ibuflen -= len;
629
630 len = (unsigned char) *ibuf++;
631 ibuflen--;
632
633 if (!len || len > ibuflen)
634 return send_reply(obj, AFPERR_BADUAM);
635
636 if (NULL == (afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) )
637 return send_reply(obj, AFPERR_BADUAM);
638 ibuf += len;
639 ibuflen -= len;
640
641 if (AFP_OK != (i = create_session_key(obj)) )
642 return send_reply(obj, i);
643
644 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen);
645
646 if (!pwd || ( i != AFP_OK && i != AFPERR_PWDEXPR))
647 return send_reply(obj, i);
648
649 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout, ((i==AFPERR_PWDEXPR)?1:0)));
650 }
651
652 /* ---------------------- */
afp_login_ext(AFPObj * obj,char * ibuf,size_t ibuflen,char * rbuf,size_t * rbuflen)653 int afp_login_ext(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen)
654 {
655 struct passwd *pwd = NULL;
656 size_t len;
657 int i;
658 char type;
659 uint16_t len16;
660 char *username;
661
662 *rbuflen = 0;
663
664 if ( nologin & 1)
665 return send_reply(obj, AFPERR_SHUTDOWN );
666
667 if (ibuflen < 5)
668 return send_reply(obj, AFPERR_BADVERS );
669
670 ibuf++;
671 ibuf++; /* pad */
672 ibuf +=2; /* flag */
673
674 len = (unsigned char) *ibuf;
675 ibuf++;
676 ibuflen -= 5;
677
678 i = get_version(obj, ibuf, ibuflen, len);
679 if (i)
680 return send_reply(obj, i );
681
682 if (ibuflen <= len)
683 return send_reply(obj, AFPERR_BADUAM);
684
685 ibuf += len;
686 ibuflen -= len;
687
688 len = (unsigned char) *ibuf;
689 ibuf++;
690 ibuflen--;
691
692 if (!len || len > ibuflen)
693 return send_reply(obj, AFPERR_BADUAM);
694
695 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL)
696 return send_reply(obj, AFPERR_BADUAM);
697 ibuf += len;
698 ibuflen -= len;
699
700 if (!afp_uam->u.uam_login.login_ext) {
701 LOG(log_error, logtype_afpd, "login_ext: uam %s not AFP 3 ready!", afp_uam->uam_name );
702 return send_reply(obj, AFPERR_BADUAM);
703 }
704 /* user name */
705 if (ibuflen <= 1 +sizeof(len16))
706 return send_reply(obj, AFPERR_PARAM);
707 type = *ibuf;
708 username = ibuf;
709 ibuf++;
710 ibuflen--;
711 if (type != 3)
712 return send_reply(obj, AFPERR_PARAM);
713
714 memcpy(&len16, ibuf, sizeof(len16));
715 ibuf += sizeof(len16);
716 ibuflen -= sizeof(len16);
717 len = ntohs(len16);
718 if (len > ibuflen)
719 return send_reply(obj, AFPERR_PARAM);
720 ibuf += len;
721 ibuflen -= len;
722
723 /* directory service name */
724 if (!ibuflen)
725 return send_reply(obj, AFPERR_PARAM);
726 type = *ibuf;
727 ibuf++;
728 ibuflen--;
729
730 switch(type) {
731 case 1:
732 case 2:
733 if (!ibuflen)
734 return send_reply(obj, AFPERR_PARAM);
735 len = (unsigned char) *ibuf;
736 ibuf++;
737 ibuflen--;
738 break;
739 case 3:
740 /* With "No User Authen" it is equal */
741 if (ibuflen < sizeof(len16))
742 return send_reply(obj, AFPERR_PARAM);
743 memcpy(&len16, ibuf, sizeof(len16));
744 ibuf += sizeof(len16);
745 ibuflen -= sizeof(len16);
746 len = ntohs(len16);
747 break;
748 default:
749 return send_reply(obj, AFPERR_PARAM);
750 }
751 #if 0
752 if (len != 0) {
753 LOG(log_error, logtype_afpd, "login_ext: directory service path not null!" );
754 return send_reply(obj, AFPERR_PARAM);
755 }
756 #endif
757 ibuf += len;
758 ibuflen -= len;
759
760 /* Pad */
761 if (ibuflen && ((unsigned long) ibuf & 1)) { /* pad character */
762 ibuf++;
763 ibuflen--;
764 }
765
766 if (AFP_OK != (i = create_session_key(obj)) ) {
767 return send_reply(obj, i);
768 }
769
770 /* FIXME user name are in UTF8 */
771 i = afp_uam->u.uam_login.login_ext(obj, username, &pwd, ibuf, ibuflen, rbuf, rbuflen);
772
773 if (!pwd || ( i != AFP_OK && i != AFPERR_PWDEXPR))
774 return send_reply(obj, i);
775
776 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout, ((i==AFPERR_PWDEXPR)?1:0)));
777 }
778
779 /* ---------------------- */
afp_logincont(AFPObj * obj,char * ibuf,size_t ibuflen,char * rbuf,size_t * rbuflen)780 int afp_logincont(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen)
781 {
782 struct passwd *pwd = NULL;
783 int err;
784
785 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL || ibuflen < 2 ) {
786 *rbuflen = 0;
787 return send_reply(obj, AFPERR_NOTAUTH );
788 }
789
790 ibuf += 2; ibuflen -= 2;
791 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen,
792 rbuf, rbuflen);
793 if (!pwd || ( err != AFP_OK && err != AFPERR_PWDEXPR))
794 return send_reply(obj, err);
795
796 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout, ((err==AFPERR_PWDEXPR)?1:0)));
797 }
798
799
afp_logout(AFPObj * obj,char * ibuf _U_,size_t ibuflen _U_,char * rbuf _U_,size_t * rbuflen)800 int afp_logout(AFPObj *obj, char *ibuf _U_, size_t ibuflen _U_, char *rbuf _U_, size_t *rbuflen)
801 {
802 DSI *dsi = (DSI *)(obj->dsi);
803
804 LOG(log_note, logtype_afpd, "AFP logout by %s", obj->username);
805 of_close_all_forks(obj);
806 close_all_vol(obj);
807 dsi->flags = DSI_AFP_LOGGED_OUT;
808 *rbuflen = 0;
809
810 /* Send FCE login event */
811 fce_register(obj, FCE_LOGOUT, "", NULL);
812
813 return AFP_OK;
814 }
815
816
817
818 /* change password --
819 * NOTE: an FPLogin must already have completed successfully for this
820 * to work. this also does a little pre-processing before it hands
821 * it off to the uam.
822 */
afp_changepw(AFPObj * obj,char * ibuf,size_t ibuflen,char * rbuf,size_t * rbuflen)823 int afp_changepw(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen)
824 {
825 char username[MACFILELEN + 1], *start = ibuf;
826 struct uam_obj *uam;
827 struct passwd *pwd;
828 size_t len;
829 int ret;
830
831 *rbuflen = 0;
832 ibuf += 2;
833
834 /* check if password change is allowed, OS-X ignores the flag.
835 * we shouldn't trust the client on this anyway.
836 * not sure about the "right" error code, NOOP for now */
837 if (!(obj->options.passwdbits & PASSWD_SET))
838 return AFPERR_NOOP;
839
840 /* make sure we can deal w/ this uam */
841 len = (unsigned char) *ibuf++;
842 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL)
843 return AFPERR_BADUAM;
844
845 ibuf += len;
846 if ((len + 1) & 1) /* pad byte */
847 ibuf++;
848
849 if (obj->afp_version < 30) {
850 len = (unsigned char) *ibuf++;
851 if ( len > sizeof(username) - 1) {
852 return AFPERR_PARAM;
853 }
854 memcpy(username, ibuf, len);
855 username[ len ] = '\0';
856 ibuf += len;
857 if ((len + 1) & 1) /* pad byte */
858 ibuf++;
859 } else {
860 /* AFP > 3.0 doesn't pass the username, APF 3.1 specs page 124 */
861 if ( ibuf[0] != '\0' || ibuf[1] != '\0')
862 return AFPERR_PARAM;
863 ibuf += 2;
864 len = MIN(sizeof(username) - 1, strlen(obj->username));
865 memcpy(username, obj->username, len);
866 username[ len ] = '\0';
867 }
868
869
870 LOG(log_info, logtype_afpd, "changing password for <%s>", username);
871
872 if (( pwd = uam_getname( obj, username, sizeof(username))) == NULL )
873 return AFPERR_PARAM;
874
875 /* send it off to the uam. we really don't use ibuflen right now. */
876 if (ibuflen < (size_t)(ibuf - start))
877 return AFPERR_PARAM;
878
879 ibuflen -= (ibuf - start);
880 ret = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen,
881 rbuf, rbuflen);
882 LOG(log_info, logtype_afpd, "password change %s.",
883 (ret == AFPERR_AUTHCONT) ? "continued" :
884 (ret ? "failed" : "succeeded"));
885 if ( ret == AFP_OK )
886 set_auth_switch(obj, 0);
887
888 return ret;
889 }
890
891
892 /* FPGetUserInfo */
afp_getuserinfo(AFPObj * obj _U_,char * ibuf,size_t ibuflen _U_,char * rbuf,size_t * rbuflen)893 int afp_getuserinfo(AFPObj *obj _U_, char *ibuf, size_t ibuflen _U_, char *rbuf, size_t *rbuflen)
894 {
895 uint8_t thisuser;
896 uint32_t id;
897 uint16_t bitmap;
898 char *bitmapp;
899
900 LOG(log_debug, logtype_afpd, "begin afp_getuserinfo:");
901
902 *rbuflen = 0;
903 ibuf++;
904 thisuser = *ibuf++;
905 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */
906 memcpy(&bitmap, ibuf, sizeof(bitmap));
907 bitmap = ntohs(bitmap);
908
909 /* deal with error cases. we don't have to worry about
910 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always
911 * succeed. */
912 if (!thisuser)
913 return AFPERR_PARAM;
914 if ((bitmap & USERIBIT_ALL) != bitmap)
915 return AFPERR_BITMAP;
916
917 /* remember place where we store the possibly modified bitmap later */
918 memcpy(rbuf, ibuf, sizeof(bitmap));
919 bitmapp = rbuf;
920 rbuf += sizeof(bitmap);
921 *rbuflen = sizeof(bitmap);
922
923 /* copy the user/group info */
924 if (bitmap & USERIBIT_USER) {
925 id = htonl(geteuid());
926 memcpy(rbuf, &id, sizeof(id));
927 rbuf += sizeof(id);
928 *rbuflen += sizeof(id);
929 }
930
931 if (bitmap & USERIBIT_GROUP) {
932 id = htonl(getegid());
933 memcpy(rbuf, &id, sizeof(id));
934 rbuf += sizeof(id);
935 *rbuflen += sizeof(id);
936 }
937
938 if (bitmap & USERIBIT_UUID) {
939 if ( ! (obj->options.flags & OPTION_UUID)) {
940 bitmap &= ~USERIBIT_UUID;
941 bitmap = htons(bitmap);
942 memcpy(bitmapp, &bitmap, sizeof(bitmap));
943 } else {
944 LOG(log_debug, logtype_afpd, "afp_getuserinfo: get UUID for \'%s\'", obj->username);
945 int ret;
946 atalk_uuid_t uuid;
947 ret = getuuidfromname( obj->username, UUID_USER, uuid);
948 if (ret != 0) {
949 LOG(log_info, logtype_afpd, "afp_getuserinfo: error getting UUID !");
950 return AFPERR_NOITEM;
951 }
952 LOG(log_debug, logtype_afpd, "afp_getuserinfo: got UUID: %s", uuid_bin2string(uuid));
953
954 memcpy(rbuf, uuid, UUID_BINSIZE);
955 rbuf += UUID_BINSIZE;
956 *rbuflen += UUID_BINSIZE;
957 }
958 }
959
960 LOG(log_debug, logtype_afpd, "END afp_getuserinfo:");
961 return AFP_OK;
962 }
963
964 #define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN || (type) == UAM_SERVER_LOGIN_EXT) ? &uam_login : \
965 (((type) == UAM_SERVER_CHANGEPW) ? \
966 &uam_changepw : NULL))
967
968 /* just do a linked list search. this could be sped up with a hashed
969 * list, but i doubt anyone's going to have enough uams to matter. */
auth_uamfind(const int type,const char * name,const int len)970 struct uam_obj *auth_uamfind(const int type, const char *name,
971 const int len)
972 {
973 struct uam_obj *prev, *start;
974
975 if (!name || !(start = UAM_LIST(type)))
976 return NULL;
977
978 prev = start;
979 while ((prev = prev->uam_prev) != start)
980 if (strndiacasecmp(prev->uam_name, name, len) == 0)
981 return prev;
982
983 return NULL;
984 }
985
auth_register(const int type,struct uam_obj * uam)986 int auth_register(const int type, struct uam_obj *uam)
987 {
988 struct uam_obj *start;
989
990 if (!uam || !uam->uam_name || (*uam->uam_name == '\0'))
991 return -1;
992
993 if (!(start = UAM_LIST(type)))
994 return 1; /* we don't know what to do with it, caller must free it */
995
996 uam_attach(start, uam);
997 return 0;
998 }
999
1000 /* load all of the modules */
auth_load(AFPObj * obj,const char * path,const char * list)1001 int auth_load(AFPObj *obj, const char *path, const char *list)
1002 {
1003 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p, *last;
1004 struct uam_mod *mod;
1005 struct stat st;
1006 size_t len;
1007
1008 if (!path || !*path || !list || (len = strlen(path)) > sizeof(name) - 2)
1009 return -1;
1010
1011 LOG(log_debug, logtype_afpd, "auth_load: %s, %s", path, list);
1012
1013 strlcpy(buf, list, sizeof(buf));
1014 if ((p = strtok_r(buf, ", ", &last)) == NULL)
1015 return -1;
1016
1017 strcpy(name, path);
1018 if (name[len - 1] != '/') {
1019 strcat(name, "/");
1020 len++;
1021 }
1022
1023 while (p) {
1024 strlcpy(name + len, p, sizeof(name) - len);
1025 LOG(log_debug, logtype_afpd, "uam: loading (%s)", name);
1026 /*
1027 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) {
1028 */
1029 if (stat(name, &st) == 0) {
1030 if ((mod = uam_load(obj, name, p))) {
1031 uam_attach(&uam_modules, mod);
1032 LOG(log_debug, logtype_afpd, "uam: %s loaded", p);
1033 } else {
1034 LOG(log_error, logtype_afpd, "uam: %s load failure",p);
1035 }
1036 } else {
1037 LOG(log_info, logtype_afpd, "uam: uam not found (status=%d)", stat(name, &st));
1038 }
1039 p = strtok_r(NULL, ", ", &last);
1040 }
1041
1042 return 0;
1043 }
1044
1045 /* get rid of all of the uams */
auth_unload(void)1046 void auth_unload(void)
1047 {
1048 struct uam_mod *mod, *prev, *start = &uam_modules;
1049
1050 prev = start->uam_prev;
1051 while ((mod = prev) != start) {
1052 prev = prev->uam_prev;
1053 uam_detach(mod);
1054 uam_unload(mod);
1055 }
1056 }
1057