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