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#ifdef HAVE_UNISTD_H 14#include <unistd.h> 15#endif /* HAVE_UNISTD_H */ 16#include <sys/types.h> 17#include <sys/param.h> 18#include <sys/stat.h> 19#include <netatalk/endian.h> 20#include <atalk/afp.h> 21#include <atalk/compat.h> 22#include <atalk/util.h> 23#include <limits.h> 24#include <string.h> 25#include <ctype.h> 26#include <time.h> 27#include <pwd.h> 28#include <grp.h> 29 30#ifdef TRU64 31#include <netdb.h> 32#include <arpa/inet.h> 33#include <sia.h> 34#include <siad.h> 35 36extern void afp_get_cmdline( int *ac, char ***av ); 37#endif /* TRU64 */ 38 39#include <atalk/logger.h> 40#include <atalk/server_ipc.h> 41#include <atalk/uuid.h> 42#include <atalk/globals.h> 43 44#include "auth.h" 45#include "uam_auth.h" 46#include "switch.h" 47#include "status.h" 48#include "fork.h" 49#include "extattrs.h" 50#ifdef HAVE_ACLS 51#include "acls.h" 52#endif 53 54int afp_version = 11; 55static int afp_version_index; 56 57uid_t uuid; 58 59#if defined( sun ) && !defined( __svr4__ ) || defined( ultrix ) 60 61int *groups; 62#define GROUPS_SIZE sizeof(int) 63 64#else /* sun __svr4__ ultrix */ 65 66gid_t *groups; 67#define GROUPS_SIZE sizeof(gid_t) 68#endif /* sun ultrix */ 69 70int ngroups; 71 72static struct uam_mod uam_modules = {NULL, NULL, &uam_modules, &uam_modules}; 73static struct uam_obj uam_login = {"", "", 0, {{NULL, NULL, NULL, NULL }}, &uam_login, 74 &uam_login}; 75static struct uam_obj uam_changepw = {"", "", 0, {{NULL, NULL, NULL, NULL}}, &uam_changepw, 76 &uam_changepw}; 77 78static struct uam_obj *afp_uam = NULL; 79 80 81void status_versions(char *data, 82#ifndef NO_DDP 83 const ASP asp, 84#endif 85 const DSI *dsi) 86{ 87 char *start = data; 88 u_int16_t status; 89 int len, num, i, count = 0; 90 91 memcpy(&status, start + AFPSTATUS_VERSOFF, sizeof(status)); 92 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ] ); 93 94 for ( i = 0; i < num; i++ ) { 95#ifndef NO_DDP 96 if ( !asp && (afp_versions[ i ].av_number <= 21)) continue; 97#endif /* ! NO_DDP */ 98 if ( !dsi && (afp_versions[ i ].av_number >= 22)) continue; 99 count++; 100 } 101 data += ntohs( status ); 102 *data++ = count; 103 104 for ( i = 0; i < num; i++ ) { 105#ifndef NO_DDP 106 if ( !asp && (afp_versions[ i ].av_number <= 21)) continue; 107#endif /* ! NO_DDP */ 108 if ( !dsi && (afp_versions[ i ].av_number >= 22)) continue; 109 len = strlen( afp_versions[ i ].av_name ); 110 *data++ = len; 111 memcpy( data, afp_versions[ i ].av_name , len ); 112 data += len; 113 } 114 status = htons( data - start ); 115 memcpy(start + AFPSTATUS_UAMSOFF, &status, sizeof(status)); 116} 117 118void status_uams(char *data, const char *authlist) 119{ 120 char *start = data; 121 u_int16_t status; 122 struct uam_obj *uams; 123 int len, num = 0; 124 125 memcpy(&status, start + AFPSTATUS_UAMSOFF, sizeof(status)); 126 uams = &uam_login; 127 while ((uams = uams->uam_prev) != &uam_login) { 128 if (strstr(authlist, uams->uam_path)) 129 num++; 130 } 131 132 data += ntohs( status ); 133 *data++ = num; 134 while ((uams = uams->uam_prev) != &uam_login) { 135 if (strstr(authlist, uams->uam_path)) { 136 LOG(log_info, logtype_afpd, "uam: \"%s\" available", uams->uam_name); 137 len = strlen( uams->uam_name); 138 *data++ = len; 139 memcpy( data, uams->uam_name, len ); 140 data += len; 141 } 142 } 143 144 /* icon offset */ 145 status = htons(data - start); 146 memcpy(start + AFPSTATUS_ICONOFF, &status, sizeof(status)); 147} 148 149/* handle errors by closing the connection. this is only needed 150 * by the afp_* functions. */ 151static int send_reply(const AFPObj *obj, const int err) 152{ 153 if ((err == AFP_OK) || (err == AFPERR_AUTHCONT)) 154 return err; 155 156 obj->reply(obj->handle, err); 157 obj->exit(0); 158 159 return AFP_OK; 160} 161 162static int afp_errpwdexpired(AFPObj *obj _U_, char *ibuf _U_, size_t ibuflen _U_, 163 char *rbuf _U_, size_t *rbuflen) 164{ 165 *rbuflen = 0; 166 return AFPERR_PWDEXPR; 167} 168 169static int afp_null_nolog(AFPObj *obj _U_, char *ibuf _U_, size_t ibuflen _U_, 170 char *rbuf _U_, size_t *rbuflen) 171{ 172 *rbuflen = 0; 173 return( AFPERR_NOOP ); 174} 175 176static int set_auth_switch(int expired) 177{ 178 int i; 179 180 if (expired) { 181 /* 182 * BF: expired password handling 183 * to allow the user to change his/her password we have to allow login 184 * but every following call except for FPChangePassword will be thrown 185 * away with an AFPERR_PWDEXPR error. (thanks to Leland Wallace from Apple 186 * for clarifying this) 187 */ 188 189 for (i=0; i<=0xff; i++) { 190 uam_afpserver_action(i, UAM_AFPSERVER_PREAUTH, afp_errpwdexpired, NULL); 191 } 192 uam_afpserver_action(AFP_LOGOUT, UAM_AFPSERVER_PREAUTH, afp_logout, NULL); 193 uam_afpserver_action(AFP_CHANGEPW, UAM_AFPSERVER_PREAUTH, afp_changepw, NULL); 194 } 195 else { 196 afp_switch = postauth_switch; 197 switch (afp_version) { 198 199 case 33: 200 case 32: 201#ifdef HAVE_ACLS 202 uam_afpserver_action(AFP_GETACL, UAM_AFPSERVER_POSTAUTH, afp_getacl, NULL); 203 uam_afpserver_action(AFP_SETACL, UAM_AFPSERVER_POSTAUTH, afp_setacl, NULL); 204 uam_afpserver_action(AFP_ACCESS, UAM_AFPSERVER_POSTAUTH, afp_access, NULL); 205#endif /* HAVE_ACLS */ 206 uam_afpserver_action(AFP_GETEXTATTR, UAM_AFPSERVER_POSTAUTH, afp_getextattr, NULL); 207 uam_afpserver_action(AFP_SETEXTATTR, UAM_AFPSERVER_POSTAUTH, afp_setextattr, NULL); 208 uam_afpserver_action(AFP_REMOVEATTR, UAM_AFPSERVER_POSTAUTH, afp_remextattr, NULL); 209 uam_afpserver_action(AFP_LISTEXTATTR, UAM_AFPSERVER_POSTAUTH, afp_listextattr, NULL); 210 211 case 31: 212 uam_afpserver_action(AFP_SYNCDIR, UAM_AFPSERVER_POSTAUTH, afp_syncdir, NULL); 213 uam_afpserver_action(AFP_SYNCFORK, UAM_AFPSERVER_POSTAUTH, afp_syncfork, NULL); 214 uam_afpserver_action(AFP_SPOTLIGHT_PRIVATE, UAM_AFPSERVER_POSTAUTH, afp_null_nolog, NULL); 215 uam_afpserver_action(AFP_ENUMERATE_EXT2, UAM_AFPSERVER_POSTAUTH, afp_enumerate_ext2, NULL); 216 217 case 30: 218 uam_afpserver_action(AFP_ENUMERATE_EXT, UAM_AFPSERVER_POSTAUTH, afp_enumerate_ext, NULL); 219 uam_afpserver_action(AFP_BYTELOCK_EXT, UAM_AFPSERVER_POSTAUTH, afp_bytelock_ext, NULL); 220 /* catsearch_ext uses the same packet as catsearch FIXME double check this, it wasn't true for enue 221 enumerate_ext */ 222 uam_afpserver_action(AFP_CATSEARCH_EXT, UAM_AFPSERVER_POSTAUTH, afp_catsearch_ext, NULL); 223 uam_afpserver_action(AFP_GETSESSTOKEN, UAM_AFPSERVER_POSTAUTH, afp_getsession, NULL); 224 uam_afpserver_action(AFP_READ_EXT, UAM_AFPSERVER_POSTAUTH, afp_read_ext, NULL); 225 uam_afpserver_action(AFP_WRITE_EXT, UAM_AFPSERVER_POSTAUTH, afp_write_ext, NULL); 226 uam_afpserver_action(AFP_DISCTOLDSESS, UAM_AFPSERVER_POSTAUTH, afp_disconnect, NULL); 227 228 case 22: 229 /* 230 * If first connection to a server is done in classic AFP2.2 version is used 231 * but OSX uses AFP3.x FPzzz command ! 232 */ 233 uam_afpserver_action(AFP_ZZZ, UAM_AFPSERVER_POSTAUTH, afp_zzz, NULL); 234 break; 235 } 236 } 237 238 return AFP_OK; 239} 240 241static int login(AFPObj *obj, struct passwd *pwd, void (*logout)(void), int expired) 242{ 243#ifdef ADMIN_GRP 244 int admin = 0; 245#endif /* ADMIN_GRP */ 246 247#if 0 248 if ( pwd->pw_uid == 0 ) { /* don't allow root login */ 249 LOG(log_error, logtype_afpd, "login: root login denied!" ); 250 return AFPERR_NOTAUTH; 251 } 252#endif 253 254 LOG(log_note, logtype_afpd, "%s Login by %s", 255 afp_versions[afp_version_index].av_name, pwd->pw_name); 256 257#ifndef NO_DDP 258 if (obj->proto == AFPPROTO_ASP) { 259 ASP asp = obj->handle; 260 int addr_net = ntohs( asp->asp_sat.sat_addr.s_net ); 261 int addr_node = asp->asp_sat.sat_addr.s_node; 262 263 if (obj->options.authprintdir) { 264 if(addr_net && addr_node) { /* Do we have a valid Appletalk address? */ 265 char nodename[256]; 266 FILE *fp; 267 int mypid = getpid(); 268 struct stat stat_buf; 269 270 sprintf(nodename, "%s/net%d.%dnode%d", obj->options.authprintdir, 271 addr_net / 256, addr_net % 256, addr_node); 272 LOG(log_info, logtype_afpd, "registering %s (uid %d) on %u.%u as %s", 273 pwd->pw_name, pwd->pw_uid, addr_net, addr_node, nodename); 274 275 if (stat(nodename, &stat_buf) == 0) { /* file exists */ 276 if (S_ISREG(stat_buf.st_mode)) { /* normal file */ 277 unlink(nodename); 278 fp = fopen(nodename, "w"); 279 fprintf(fp, "%s:%d\n", pwd->pw_name, mypid); 280 fclose(fp); 281 chown( nodename, pwd->pw_uid, -1 ); 282 } else { /* somebody is messing with us */ 283 LOG(log_error, logtype_afpd, "print authfile %s is not a normal file, it will not be modified", nodename ); 284 } 285 } else { /* file 'nodename' does not exist */ 286 fp = fopen(nodename, "w"); 287 fprintf(fp, "%s:%d\n", pwd->pw_name, mypid); 288 fclose(fp); 289 chown( nodename, pwd->pw_uid, -1 ); 290 } 291 } /* if (addr_net && addr_node ) */ 292 } /* if (options->authprintdir) */ 293 } /* if (obj->proto == AFPPROTO_ASP) */ 294#endif 295 296 if (set_groups(obj, pwd) != 0) 297 return AFPERR_BADUAM; 298 299#ifdef ADMIN_GRP 300 LOG(log_debug, logtype_afpd, "obj->options.admingid == %d", obj->options.admingid); 301 302 if (obj->options.admingid != 0) { 303 int i; 304 for (i = 0; i < ngroups; i++) { 305 if (groups[i] == obj->options.admingid) admin = 1; 306 } 307 } 308 if (admin) { 309 ad_setfuid(0); 310 LOG(log_info, logtype_afpd, "admin login -- %s", pwd->pw_name ); 311 } 312 if (!admin) 313#endif /* ADMIN_GRP */ 314#ifdef TRU64 315 { 316 struct DSI *dsi = obj->handle; 317 struct hostent *hp; 318 char *clientname; 319 int argc; 320 char **argv; 321 char hostname[256]; 322 323 afp_get_cmdline( &argc, &argv ); 324 325 hp = gethostbyaddr( (char *) &dsi->client.sin_addr, 326 sizeof( struct in_addr ), 327 dsi->client.sin_family ); 328 329 if( hp ) 330 clientname = hp->h_name; 331 else 332 clientname = inet_ntoa( dsi->client.sin_addr ); 333 334 sprintf( hostname, "%s@%s", pwd->pw_name, clientname ); 335 336 if( sia_become_user( NULL, argc, argv, hostname, pwd->pw_name, 337 NULL, FALSE, NULL, NULL, 338 SIA_BEU_REALLOGIN ) != SIASUCCESS ) 339 return AFPERR_BADUAM; 340 341 LOG(log_info, logtype_afpd, "session from %s (%s)", hostname, 342 inet_ntoa( dsi->client.sin_addr ) ); 343 344 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) { 345 LOG(log_error, logtype_afpd, "login: %s %s", pwd->pw_name, strerror(errno) ); 346 return AFPERR_BADUAM; 347 } 348 } 349#else /* TRU64 */ 350 if (setegid( pwd->pw_gid ) < 0 || seteuid( pwd->pw_uid ) < 0) { 351 LOG(log_error, logtype_afpd, "login: %s %s", pwd->pw_name, strerror(errno) ); 352 return AFPERR_BADUAM; 353 } 354#endif /* TRU64 */ 355 356 LOG(log_debug, logtype_afpd, "login: supplementary groups: %s", print_groups(ngroups, groups)); 357 358 /* There's probably a better way to do this, but for now, we just play root */ 359#ifdef ADMIN_GRP 360 if (admin) 361 uuid = 0; 362 else 363#endif /* ADMIN_GRP */ 364 uuid = pwd->pw_uid; 365 366 set_auth_switch(expired); 367 /* save our euid, we need it for preexec_close */ 368 obj->uid = geteuid(); 369 obj->logout = logout; 370 371#ifdef FORCE_UIDGID 372 obj->force_uid = 1; 373 save_uidgid ( &obj->uidgid ); 374#endif 375 376 /* pam_umask or similar might have changed our umask */ 377 (void)umask(obj->options.umask); 378 379 /* Some PAM module might have reset our signal handlers and timer, so we need to reestablish them */ 380 afp_over_dsi_sighandlers(obj); 381 382 return( AFP_OK ); 383} 384 385#define GROUPSTR_BUFSIZE 1024 386const char *print_groups(int ngroups, gid_t *groups) 387{ 388 static char groupsstr[GROUPSTR_BUFSIZE]; 389 int i; 390 char *s = groupsstr; 391 392 if (ngroups == 0) 393 return "-"; 394 395 for (i = 0; (i < ngroups) && (s < &groupsstr[GROUPSTR_BUFSIZE]); i++) { 396 s += snprintf(s, &groupsstr[GROUPSTR_BUFSIZE] - s, " %u", groups[i]); 397 } 398 399 return groupsstr; 400} 401 402int set_groups(AFPObj *obj, struct passwd *pwd) 403{ 404 if (initgroups(pwd->pw_name, pwd->pw_gid) < 0) 405 LOG(log_error, logtype_afpd, "initgroups(%s, %d): %s", pwd->pw_name, pwd->pw_gid, strerror(errno)); 406 407 if ((ngroups = getgroups(0, NULL)) < 0) { 408 LOG(log_error, logtype_afpd, "login: %s getgroups: %s", pwd->pw_name, strerror(errno)); 409 return -1; 410 } 411 412 if (groups) 413 free(groups); 414 if (NULL == (groups = calloc(ngroups, GROUPS_SIZE)) ) { 415 LOG(log_error, logtype_afpd, "login: %s calloc: %d", ngroups); 416 return -1; 417 } 418 419 if ((ngroups = getgroups(ngroups, groups)) < 0 ) { 420 LOG(log_error, logtype_afpd, "login: %s getgroups: %s", pwd->pw_name, strerror(errno)); 421 return -1; 422 } 423 424 return 0; 425} 426 427/* ---------------------- */ 428int afp_zzz(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen) 429{ 430 uint32_t data; 431 DSI *dsi = (DSI *)AFPobj->handle; 432 433 *rbuflen = 0; 434 ibuf += 2; 435 ibuflen -= 2; 436 437 if (ibuflen < 4) 438 return AFPERR_MISC; 439 memcpy(&data, ibuf, 4); /* flag */ 440 data = ntohl(data); 441 442 /* 443 * Possible sleeping states: 444 * 1) normal sleep: DSI_SLEEPING (up to 10.3) 445 * 2) extended sleep: DSI_SLEEPING | DSI_EXTSLEEP (starting with 10.4) 446 */ 447 448 if (data & AFPZZZ_EXT_WAKEUP) { 449 /* wakeup request from exetended sleep */ 450 if (dsi->flags & DSI_EXTSLEEP) { 451 LOG(log_note, logtype_afpd, "afp_zzz: waking up from extended sleep"); 452 dsi->flags &= ~(DSI_SLEEPING | DSI_EXTSLEEP); 453 } 454 } else { 455 /* sleep request */ 456 dsi->flags |= DSI_SLEEPING; 457 if (data & AFPZZZ_EXT_SLEEP) { 458 LOG(log_note, logtype_afpd, "afp_zzz: entering extended sleep"); 459 dsi->flags |= DSI_EXTSLEEP; 460 } else { 461 LOG(log_note, logtype_afpd, "afp_zzz: entering normal sleep"); 462 } 463 } 464 465 /* 466 * According to AFP 3.3 spec we should not return anything, 467 * but eg 10.5.8 server still returns the numbers of hours 468 * the server is keeping the sessino (ie max sleeptime). 469 */ 470 data = obj->options.sleep / 120; /* hours */ 471 if (!data) { 472 data = 1; 473 } 474 *rbuflen = sizeof(data); 475 data = htonl(data); 476 memcpy(rbuf, &data, sizeof(data)); 477 rbuf += sizeof(data); 478 479 return AFP_OK; 480} 481 482/* ---------------------- */ 483static int create_session_token(AFPObj *obj) 484{ 485 pid_t pid; 486 487 /* use 8 bytes for token as OSX, don't know if it helps */ 488 if ( sizeof(pid_t) > SESSIONTOKEN_LEN) { 489 LOG(log_error, logtype_afpd, "sizeof(pid_t) > %u", SESSIONTOKEN_LEN ); 490 return AFPERR_MISC; 491 } 492 493 if ( NULL == (obj->sinfo.sessiontoken = malloc(SESSIONTOKEN_LEN)) ) 494 return AFPERR_MISC; 495 496 memset(obj->sinfo.sessiontoken, 0, SESSIONTOKEN_LEN); 497 obj->sinfo.sessiontoken_len = SESSIONTOKEN_LEN; 498 pid = getpid(); 499 memcpy(obj->sinfo.sessiontoken, &pid, sizeof(pid_t)); 500 501 return 0; 502} 503 504static int create_session_key(AFPObj *obj) 505{ 506 /* create session key */ 507 if (obj->sinfo.sessionkey == NULL) { 508 if (NULL == (obj->sinfo.sessionkey = malloc(SESSIONKEY_LEN)) ) 509 return AFPERR_MISC; 510 uam_random_string(obj, obj->sinfo.sessionkey, SESSIONKEY_LEN); 511 obj->sinfo.sessionkey_len = SESSIONKEY_LEN; 512 } 513 return AFP_OK; 514} 515 516 517/* ---------------------- */ 518int afp_getsession( 519 AFPObj *obj, 520 char *ibuf, size_t ibuflen, 521 char *rbuf, size_t *rbuflen) 522{ 523 u_int16_t type; 524 u_int32_t idlen = 0; 525 u_int32_t boottime; 526 u_int32_t tklen, tp; 527 char *token; 528 char *p; 529 530 *rbuflen = 0; 531 tklen = 0; 532 533 if (ibuflen < 2 + sizeof(type)) { 534 return AFPERR_PARAM; 535 } 536 537 ibuf += 2; 538 ibuflen -= 2; 539 540 memcpy(&type, ibuf, sizeof(type)); 541 type = ntohs(type); 542 ibuf += sizeof(type); 543 ibuflen -= sizeof(type); 544 545 if ( obj->sinfo.sessiontoken == NULL ) { 546 if ( create_session_token( obj ) ) 547 return AFPERR_MISC; 548 } 549 550 /* 551 * 552 */ 553 switch (type) { 554 case 0: /* old version ?*/ 555 tklen = obj->sinfo.sessiontoken_len; 556 token = obj->sinfo.sessiontoken; 557 break; 558 case 1: /* disconnect */ 559 case 2: /* reconnect update id */ 560 if (ibuflen >= sizeof(idlen)) { 561 memcpy(&idlen, ibuf, sizeof(idlen)); 562 idlen = ntohl(idlen); 563 ibuf += sizeof(idlen); 564 ibuflen -= sizeof(idlen); 565 if (ibuflen < idlen) { 566 return AFPERR_PARAM; 567 } 568 /* memcpy (id, ibuf, idlen) */ 569 tklen = obj->sinfo.sessiontoken_len; 570 token = obj->sinfo.sessiontoken; 571 } 572 break; 573 case 3: 574 case 4: 575 if (ibuflen >= 8 ) { 576 p = ibuf; 577 memcpy( &idlen, ibuf, sizeof(idlen)); 578 idlen = ntohl(idlen); 579 ibuf += sizeof(idlen); 580 ibuflen -= sizeof(idlen); 581 ibuf += sizeof(boottime); 582 ibuflen -= sizeof(boottime); 583 if (ibuflen < idlen || idlen > (90-10)) { 584 return AFPERR_PARAM; 585 } 586 if (!obj->sinfo.clientid) { 587 obj->sinfo.clientid = malloc(idlen + 8); 588 memcpy(obj->sinfo.clientid, p, idlen + 8); 589 obj->sinfo.clientid_len = idlen + 8; 590 } 591 if (ipc_child_write(obj->ipc_fd, IPC_GETSESSION, idlen+8, p) != 0) 592 return AFPERR_MISC; 593 tklen = obj->sinfo.sessiontoken_len; 594 token = obj->sinfo.sessiontoken; 595 } 596 break; 597 case 8: /* Panther Kerberos Token */ 598 tklen = obj->sinfo.cryptedkey_len; 599 token = obj->sinfo.cryptedkey; 600 break; 601 default: 602 return AFPERR_NOOP; 603 break; 604 605 } 606 607 if (tklen == 0) 608 return AFPERR_MISC; 609 610 tp = htonl(tklen); 611 memcpy(rbuf, &tp, sizeof(tklen)); 612 rbuf += sizeof(tklen); 613 *rbuflen += sizeof(tklen); 614 615 memcpy(rbuf, token, tklen); 616 *rbuflen += tklen; 617 618 return AFP_OK; 619} 620 621/* ---------------------- */ 622int afp_disconnect(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size_t *rbuflen) 623{ 624 DSI *dsi = (DSI *)obj->handle; 625 u_int16_t type; 626 u_int32_t tklen; 627 pid_t token; 628 int i; 629 630 *rbuflen = 0; 631 ibuf += 2; 632 633#if 0 634 /* check for guest user */ 635 if ( 0 == (strcasecmp(obj->username, obj->options.guest)) ) { 636 return AFPERR_MISC; 637 } 638#endif 639 640 memcpy(&type, ibuf, sizeof(type)); 641 type = ntohs(type); 642 ibuf += sizeof(type); 643 644 memcpy(&tklen, ibuf, sizeof(tklen)); 645 tklen = ntohl(tklen); 646 ibuf += sizeof(tklen); 647 648 if ( sizeof(pid_t) > SESSIONTOKEN_LEN) { 649 LOG(log_error, logtype_afpd, "sizeof(pid_t) > %u", SESSIONTOKEN_LEN ); 650 return AFPERR_MISC; 651 } 652 if (tklen != SESSIONTOKEN_LEN) { 653 return AFPERR_MISC; 654 } 655 tklen = sizeof(pid_t); 656 memcpy(&token, ibuf, tklen); 657 658 /* our stuff is pid + zero pad */ 659 ibuf += tklen; 660 for (i = tklen; i < SESSIONTOKEN_LEN; i++, ibuf++) { 661 if (*ibuf != 0) { 662 return AFPERR_MISC; 663 } 664 } 665 666 LOG(log_note, logtype_afpd, "afp_disconnect: trying primary reconnect"); 667 dsi->flags |= DSI_RECONINPROG; 668 669 /* Deactivate tickle timer */ 670 const struct itimerval none = {{0, 0}, {0, 0}}; 671 setitimer(ITIMER_REAL, &none, NULL); 672 673 /* check for old session, possibly transfering session from here to there */ 674 if (ipc_child_write(obj->ipc_fd, IPC_DISCOLDSESSION, tklen, &token) != 0) 675 goto exit; 676 /* write uint16_t DSI request ID */ 677 if (writet(obj->ipc_fd, &dsi->header.dsi_requestID, 2, 0, 2) != 2) { 678 LOG(log_error, logtype_afpd, "afp_disconnect: couldn't send DSI request ID"); 679 goto exit; 680 } 681 /* now send our connected AFP client socket */ 682 if (send_fd(obj->ipc_fd, dsi->socket) != 0) 683 goto exit; 684 /* Now see what happens: either afpd master sends us SIGTERM because our session */ 685 /* has been transfered to a old disconnected session, or we continue */ 686 sleep(5); 687 688 if (!(dsi->flags & DSI_RECONINPROG)) { /* deleted in SIGTERM handler */ 689 /* Reconnect succeeded, we exit now after sleeping some more */ 690 sleep(2); /* sleep some more to give the recon. session time */ 691 LOG(log_note, logtype_afpd, "afp_disconnect: primary reconnect succeeded"); 692 exit(0); 693 } 694 695exit: 696 /* Reinstall tickle timer */ 697 setitimer(ITIMER_REAL, &dsi->timer, NULL); 698 699 LOG(log_error, logtype_afpd, "afp_disconnect: primary reconnect failed"); 700 return AFPERR_MISC; 701} 702 703/* ---------------------- */ 704static int get_version(AFPObj *obj, char *ibuf, size_t ibuflen, size_t len) 705{ 706 int num,i; 707 708 if (!len || len > ibuflen) 709 return AFPERR_BADVERS; 710 711 num = sizeof( afp_versions ) / sizeof( afp_versions[ 0 ]); 712 for ( i = 0; i < num; i++ ) { 713 if ( strncmp( ibuf, afp_versions[ i ].av_name , len ) == 0 ) { 714 afp_version = afp_versions[ i ].av_number; 715 afp_version_index = i; 716 break; 717 } 718 } 719 if ( i == num ) /* An inappropo version */ 720 return AFPERR_BADVERS ; 721 722 if (afp_version >= 30 && obj->proto != AFPPROTO_DSI) 723 return AFPERR_BADVERS ; 724 725 /* FIXME Hack */ 726 if (afp_version >= 30 && sizeof(off_t) != 8) { 727 LOG(log_error, logtype_afpd, "get_version: no LARGE_FILE support recompile!" ); 728 return AFPERR_BADVERS ; 729 } 730 731 return 0; 732} 733 734/* ---------------------- */ 735int afp_login(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen) 736{ 737 struct passwd *pwd = NULL; 738 size_t len; 739 int i; 740 741 *rbuflen = 0; 742 743 if ( nologin & 1) 744 return send_reply(obj, AFPERR_SHUTDOWN ); 745 746 if (ibuflen < 2) 747 return send_reply(obj, AFPERR_BADVERS ); 748 749 ibuf++; 750 len = (unsigned char) *ibuf++; 751 ibuflen -= 2; 752 753 i = get_version(obj, ibuf, ibuflen, len); 754 if (i) 755 return send_reply(obj, i ); 756 757 if (ibuflen <= len) 758 return send_reply(obj, AFPERR_BADUAM); 759 760 ibuf += len; 761 ibuflen -= len; 762 763 len = (unsigned char) *ibuf++; 764 ibuflen--; 765 766 if (!len || len > ibuflen) 767 return send_reply(obj, AFPERR_BADUAM); 768 769 if (NULL == (afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) ) 770 return send_reply(obj, AFPERR_BADUAM); 771 ibuf += len; 772 ibuflen -= len; 773 774 if (AFP_OK != (i = create_session_key(obj)) ) 775 return send_reply(obj, i); 776 777 i = afp_uam->u.uam_login.login(obj, &pwd, ibuf, ibuflen, rbuf, rbuflen); 778 779 if (!pwd || ( i != AFP_OK && i != AFPERR_PWDEXPR)) 780 return send_reply(obj, i); 781 782 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout, ((i==AFPERR_PWDEXPR)?1:0))); 783} 784 785/* ---------------------- */ 786int afp_login_ext(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen) 787{ 788 struct passwd *pwd = NULL; 789 size_t len; 790 int i; 791 char type; 792 u_int16_t len16; 793 char *username; 794 795 *rbuflen = 0; 796 797 if ( nologin & 1) 798 return send_reply(obj, AFPERR_SHUTDOWN ); 799 800 if (ibuflen < 5) 801 return send_reply(obj, AFPERR_BADVERS ); 802 803 ibuf++; 804 ibuf++; /* pad */ 805 ibuf +=2; /* flag */ 806 807 len = (unsigned char) *ibuf; 808 ibuf++; 809 ibuflen -= 5; 810 811 i = get_version(obj, ibuf, ibuflen, len); 812 if (i) 813 return send_reply(obj, i ); 814 815 if (ibuflen <= len) 816 return send_reply(obj, AFPERR_BADUAM); 817 818 ibuf += len; 819 ibuflen -= len; 820 821 len = (unsigned char) *ibuf; 822 ibuf++; 823 ibuflen--; 824 825 if (!len || len > ibuflen) 826 return send_reply(obj, AFPERR_BADUAM); 827 828 if ((afp_uam = auth_uamfind(UAM_SERVER_LOGIN, ibuf, len)) == NULL) 829 return send_reply(obj, AFPERR_BADUAM); 830 ibuf += len; 831 ibuflen -= len; 832 833 if (!afp_uam->u.uam_login.login_ext) { 834 LOG(log_error, logtype_afpd, "login_ext: uam %s not AFP 3 ready!", afp_uam->uam_name ); 835 return send_reply(obj, AFPERR_BADUAM); 836 } 837 /* user name */ 838 if (ibuflen <= 1 +sizeof(len16)) 839 return send_reply(obj, AFPERR_PARAM); 840 type = *ibuf; 841 username = ibuf; 842 ibuf++; 843 ibuflen--; 844 if (type != 3) 845 return send_reply(obj, AFPERR_PARAM); 846 847 memcpy(&len16, ibuf, sizeof(len16)); 848 ibuf += sizeof(len16); 849 ibuflen -= sizeof(len16); 850 len = ntohs(len16); 851 if (len > ibuflen) 852 return send_reply(obj, AFPERR_PARAM); 853 ibuf += len; 854 ibuflen -= len; 855 856 /* directory service name */ 857 if (!ibuflen) 858 return send_reply(obj, AFPERR_PARAM); 859 type = *ibuf; 860 ibuf++; 861 ibuflen--; 862 863 switch(type) { 864 case 1: 865 case 2: 866 if (!ibuflen) 867 return send_reply(obj, AFPERR_PARAM); 868 len = (unsigned char) *ibuf; 869 ibuf++; 870 ibuflen--; 871 break; 872 case 3: 873 /* With "No User Authen" it is equal */ 874 if (ibuflen < sizeof(len16)) 875 return send_reply(obj, AFPERR_PARAM); 876 memcpy(&len16, ibuf, sizeof(len16)); 877 ibuf += sizeof(len16); 878 ibuflen -= sizeof(len16); 879 len = ntohs(len16); 880 break; 881 default: 882 return send_reply(obj, AFPERR_PARAM); 883 } 884#if 0 885 if (len != 0) { 886 LOG(log_error, logtype_afpd, "login_ext: directory service path not null!" ); 887 return send_reply(obj, AFPERR_PARAM); 888 } 889#endif 890 ibuf += len; 891 ibuflen -= len; 892 893 /* Pad */ 894 if (ibuflen && ((unsigned long) ibuf & 1)) { /* pad character */ 895 ibuf++; 896 ibuflen--; 897 } 898 899 if (AFP_OK != (i = create_session_key(obj)) ) { 900 return send_reply(obj, i); 901 } 902 903 /* FIXME user name are in UTF8 */ 904 i = afp_uam->u.uam_login.login_ext(obj, username, &pwd, ibuf, ibuflen, rbuf, rbuflen); 905 906 if (!pwd || ( i != AFP_OK && i != AFPERR_PWDEXPR)) 907 return send_reply(obj, i); 908 909 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout, ((i==AFPERR_PWDEXPR)?1:0))); 910} 911 912/* ---------------------- */ 913int afp_logincont(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen) 914{ 915 struct passwd *pwd = NULL; 916 int err; 917 918 if ( afp_uam == NULL || afp_uam->u.uam_login.logincont == NULL || ibuflen < 2 ) { 919 *rbuflen = 0; 920 return send_reply(obj, AFPERR_NOTAUTH ); 921 } 922 923 ibuf += 2; ibuflen -= 2; 924 err = afp_uam->u.uam_login.logincont(obj, &pwd, ibuf, ibuflen, 925 rbuf, rbuflen); 926 if (!pwd || ( err != AFP_OK && err != AFPERR_PWDEXPR)) 927 return send_reply(obj, err); 928 929 return send_reply(obj, login(obj, pwd, afp_uam->u.uam_login.logout, ((err==AFPERR_PWDEXPR)?1:0))); 930} 931 932 933int afp_logout(AFPObj *obj, char *ibuf _U_, size_t ibuflen _U_, char *rbuf _U_, size_t *rbuflen) 934{ 935 DSI *dsi = (DSI *)(obj->handle); 936 937 LOG(log_note, logtype_afpd, "AFP logout by %s", obj->username); 938 of_close_all_forks(); 939 close_all_vol(); 940 dsi->flags = DSI_AFP_LOGGED_OUT; 941 *rbuflen = 0; 942 return AFP_OK; 943} 944 945 946 947/* change password -- 948 * NOTE: an FPLogin must already have completed successfully for this 949 * to work. this also does a little pre-processing before it hands 950 * it off to the uam. 951 */ 952int afp_changepw(AFPObj *obj, char *ibuf, size_t ibuflen, char *rbuf, size_t *rbuflen) 953{ 954 char username[MACFILELEN + 1], *start = ibuf; 955 struct uam_obj *uam; 956 struct passwd *pwd; 957 size_t len; 958 int ret; 959 960 *rbuflen = 0; 961 ibuf += 2; 962 963 /* check if password change is allowed, OS-X ignores the flag. 964 * we shouldn't trust the client on this anyway. 965 * not sure about the "right" error code, NOOP for now */ 966 if (!(obj->options.passwdbits & PASSWD_SET)) 967 return AFPERR_NOOP; 968 969 /* make sure we can deal w/ this uam */ 970 len = (unsigned char) *ibuf++; 971 if ((uam = auth_uamfind(UAM_SERVER_CHANGEPW, ibuf, len)) == NULL) 972 return AFPERR_BADUAM; 973 974 ibuf += len; 975 if ((len + 1) & 1) /* pad byte */ 976 ibuf++; 977 978 if ( afp_version < 30) { 979 len = (unsigned char) *ibuf++; 980 if ( len > sizeof(username) - 1) { 981 return AFPERR_PARAM; 982 } 983 memcpy(username, ibuf, len); 984 username[ len ] = '\0'; 985 ibuf += len; 986 if ((len + 1) & 1) /* pad byte */ 987 ibuf++; 988 } else { 989 /* AFP > 3.0 doesn't pass the username, APF 3.1 specs page 124 */ 990 if ( ibuf[0] != '\0' || ibuf[1] != '\0') 991 return AFPERR_PARAM; 992 ibuf += 2; 993 len = MIN(sizeof(username), strlen(obj->username)); 994 memcpy(username, obj->username, len); 995 username[ len ] = '\0'; 996 } 997 998 999 LOG(log_info, logtype_afpd, "changing password for <%s>", username); 1000 1001 if (( pwd = uam_getname( obj, username, sizeof(username))) == NULL ) 1002 return AFPERR_PARAM; 1003 1004 /* send it off to the uam. we really don't use ibuflen right now. */ 1005 if (ibuflen < (size_t)(ibuf - start)) 1006 return AFPERR_PARAM; 1007 1008 ibuflen -= (ibuf - start); 1009 ret = uam->u.uam_changepw(obj, username, pwd, ibuf, ibuflen, 1010 rbuf, rbuflen); 1011 LOG(log_info, logtype_afpd, "password change %s.", 1012 (ret == AFPERR_AUTHCONT) ? "continued" : 1013 (ret ? "failed" : "succeeded")); 1014 if ( ret == AFP_OK ) 1015 set_auth_switch(0); 1016 1017 return ret; 1018} 1019 1020 1021/* FPGetUserInfo */ 1022int afp_getuserinfo(AFPObj *obj _U_, char *ibuf, size_t ibuflen _U_, char *rbuf, size_t *rbuflen) 1023{ 1024 u_int8_t thisuser; 1025 u_int32_t id; 1026 u_int16_t bitmap; 1027 char *bitmapp; 1028 1029 LOG(log_debug, logtype_afpd, "begin afp_getuserinfo:"); 1030 1031 *rbuflen = 0; 1032 ibuf++; 1033 thisuser = *ibuf++; 1034 ibuf += sizeof(id); /* userid is not used in AFP 2.0 */ 1035 memcpy(&bitmap, ibuf, sizeof(bitmap)); 1036 bitmap = ntohs(bitmap); 1037 1038 /* deal with error cases. we don't have to worry about 1039 * AFPERR_ACCESS or AFPERR_NOITEM as geteuid and getegid always 1040 * succeed. */ 1041 if (!thisuser) 1042 return AFPERR_PARAM; 1043 if ((bitmap & USERIBIT_ALL) != bitmap) 1044 return AFPERR_BITMAP; 1045 1046 /* remember place where we store the possibly modified bitmap later */ 1047 memcpy(rbuf, ibuf, sizeof(bitmap)); 1048 bitmapp = rbuf; 1049 rbuf += sizeof(bitmap); 1050 *rbuflen = sizeof(bitmap); 1051 1052 /* copy the user/group info */ 1053 if (bitmap & USERIBIT_USER) { 1054 id = htonl(geteuid()); 1055 memcpy(rbuf, &id, sizeof(id)); 1056 rbuf += sizeof(id); 1057 *rbuflen += sizeof(id); 1058 } 1059 1060 if (bitmap & USERIBIT_GROUP) { 1061 id = htonl(getegid()); 1062 memcpy(rbuf, &id, sizeof(id)); 1063 rbuf += sizeof(id); 1064 *rbuflen += sizeof(id); 1065 } 1066 1067 if (bitmap & USERIBIT_UUID) { 1068 if ( ! (obj->options.flags & OPTION_UUID)) { 1069 bitmap &= ~USERIBIT_UUID; 1070 bitmap = htons(bitmap); 1071 memcpy(bitmapp, &bitmap, sizeof(bitmap)); 1072 } else { 1073 LOG(log_debug, logtype_afpd, "afp_getuserinfo: get UUID for \'%s\'", obj->username); 1074 int ret; 1075 atalk_uuid_t uuid; 1076 ret = getuuidfromname( obj->username, UUID_USER, uuid); 1077 if (ret != 0) { 1078 LOG(log_info, logtype_afpd, "afp_getuserinfo: error getting UUID !"); 1079 return AFPERR_NOITEM; 1080 } 1081 LOG(log_debug, logtype_afpd, "afp_getuserinfo: got UUID: %s", uuid_bin2string(uuid)); 1082 1083 memcpy(rbuf, uuid, UUID_BINSIZE); 1084 rbuf += UUID_BINSIZE; 1085 *rbuflen += UUID_BINSIZE; 1086 } 1087 } 1088 1089 LOG(log_debug, logtype_afpd, "END afp_getuserinfo:"); 1090 return AFP_OK; 1091} 1092 1093#define UAM_LIST(type) (((type) == UAM_SERVER_LOGIN || (type) == UAM_SERVER_LOGIN_EXT) ? &uam_login : \ 1094 (((type) == UAM_SERVER_CHANGEPW) ? \ 1095 &uam_changepw : NULL)) 1096 1097/* just do a linked list search. this could be sped up with a hashed 1098 * list, but i doubt anyone's going to have enough uams to matter. */ 1099struct uam_obj *auth_uamfind(const int type, const char *name, 1100 const int len) 1101{ 1102 struct uam_obj *prev, *start; 1103 1104 if (!name || !(start = UAM_LIST(type))) 1105 return NULL; 1106 1107 prev = start; 1108 while ((prev = prev->uam_prev) != start) 1109 if (strndiacasecmp(prev->uam_name, name, len) == 0) 1110 return prev; 1111 1112 return NULL; 1113} 1114 1115int auth_register(const int type, struct uam_obj *uam) 1116{ 1117 struct uam_obj *start; 1118 1119 if (!uam || !uam->uam_name || (*uam->uam_name == '\0')) 1120 return -1; 1121 1122 if (!(start = UAM_LIST(type))) 1123 return 1; /* we don't know what to do with it, caller must free it */ 1124 1125 uam_attach(start, uam); 1126 return 0; 1127} 1128 1129/* load all of the modules */ 1130int auth_load(const char *path, const char *list) 1131{ 1132 char name[MAXPATHLEN + 1], buf[MAXPATHLEN + 1], *p; 1133 struct uam_mod *mod; 1134 struct stat st; 1135 size_t len; 1136 1137 if (!path || !*path || !list || (len = strlen(path)) > sizeof(name) - 2) 1138 return -1; 1139 1140 strlcpy(buf, list, sizeof(buf)); 1141 if ((p = strtok(buf, ",")) == NULL) 1142 return -1; 1143 1144 strcpy(name, path); 1145 if (name[len - 1] != '/') { 1146 strcat(name, "/"); 1147 len++; 1148 } 1149 1150 while (p) { 1151 strlcpy(name + len, p, sizeof(name) - len); 1152 LOG(log_debug, logtype_afpd, "uam: loading (%s)", name); 1153 /* 1154 if ((stat(name, &st) == 0) && (mod = uam_load(name, p))) { 1155 */ 1156 if (stat(name, &st) == 0) { 1157 if ((mod = uam_load(name, p))) { 1158 uam_attach(&uam_modules, mod); 1159 LOG(log_debug, logtype_afpd, "uam: %s loaded", p); 1160 } else { 1161 LOG(log_error, logtype_afpd, "uam: %s load failure",p); 1162 } 1163 } else { 1164 LOG(log_info, logtype_afpd, "uam: uam not found (status=%d)", stat(name, &st)); 1165 } 1166 p = strtok(NULL, ","); 1167 } 1168 1169 return 0; 1170} 1171 1172/* get rid of all of the uams */ 1173void auth_unload(void) 1174{ 1175 struct uam_mod *mod, *prev, *start = &uam_modules; 1176 1177 prev = start->uam_prev; 1178 while ((mod = prev) != start) { 1179 prev = prev->uam_prev; 1180 uam_detach(mod); 1181 uam_unload(mod); 1182 } 1183} 1184