| 1 | /* |
| 2 | * $Id$ |
| 3 | * |
| 4 | * Copyright 1990,1991 by the Massachusetts Institute of Technology |
| 5 | * For distribution and copying rights, see the file "mit-copyright.h" |
| 6 | */ |
| 7 | /* |
| 8 | * Copyright (c) 2005, 2006 |
| 9 | * The Linux Box Corporation |
| 10 | * ALL RIGHTS RESERVED |
| 11 | * |
| 12 | * Permission is granted to use, copy, create derivative works |
| 13 | * and redistribute this software and such derivative works |
| 14 | * for any purpose, so long as the name of the Linux Box |
| 15 | * Corporation is not used in any advertising or publicity |
| 16 | * pertaining to the use or distribution of this software |
| 17 | * without specific, written prior authorization. If the |
| 18 | * above copyright notice or any other identification of the |
| 19 | * Linux Box Corporation is included in any copy of any |
| 20 | * portion of this software, then the disclaimer below must |
| 21 | * also be included. |
| 22 | * |
| 23 | * This software is provided as is, without representation |
| 24 | * from the Linux Box Corporation as to its fitness for any |
| 25 | * purpose, and without warranty by the Linux Box Corporation |
| 26 | * of any kind, either express or implied, including |
| 27 | * without limitation the implied warranties of |
| 28 | * merchantability and fitness for a particular purpose. The |
| 29 | * regents of the Linux Box Corporation shall not be liable |
| 30 | * for any damages, including special, indirect, incidental, or |
| 31 | * consequential damages, with respect to any claim arising |
| 32 | * out of or in connection with the use of the software, even |
| 33 | * if it has been or is hereafter advised of the possibility of |
| 34 | * such damages. |
| 35 | */ |
| 36 | |
| 37 | #include <afsconfig.h> |
| 38 | #include <afs/param.h> |
| 39 | #include <afs/stds.h> |
| 40 | |
| 41 | #include <roken.h> |
| 42 | |
| 43 | #include <ctype.h> |
| 44 | |
| 45 | #include <afs/ktc.h> |
| 46 | #include <afs/token.h> |
| 47 | |
| 48 | #define KERBEROS_APPLE_DEPRECATED(x) |
| 49 | #include <krb5.h> |
| 50 | #ifdef HAVE_COM_ERR_H |
| 51 | # include <com_err.h> |
| 52 | #elif HAVE_ET_COM_ERR_H |
| 53 | # include <et/com_err.h> |
| 54 | #elif HAVE_KRB5_COM_ERR_H |
| 55 | # include <krb5/com_err.h> |
| 56 | #else |
| 57 | # error No com_err.h? We need some kind of com_err.h |
| 58 | #endif |
| 59 | |
| 60 | #ifndef HAVE_KERBEROSV_HEIM_ERR_H |
| 61 | #include <afs/com_err.h> |
| 62 | #endif |
| 63 | |
| 64 | #ifdef AFS_SUN5_ENV |
| 65 | #include <sys/ioccom.h> |
| 66 | #endif |
| 67 | |
| 68 | #include <afs/auth.h> |
| 69 | #include <afs/cellconfig.h> |
| 70 | #include <afs/vice.h> |
| 71 | #include <afs/venus.h> |
| 72 | #include <afs/ptserver.h> |
| 73 | #include <afs/ptuser.h> |
| 74 | #include <afs/pterror.h> |
| 75 | #include <afs/dirpath.h> |
| 76 | #include <afs/afsutil.h> |
| 77 | |
| 78 | #include "aklog.h" |
| 79 | #include "linked_list.h" |
| 80 | |
| 81 | #ifdef HAVE_KRB5_CREDS_KEYBLOCK |
| 82 | #define USING_MIT 1 |
| 83 | #endif |
| 84 | #ifdef HAVE_KRB5_CREDS_SESSION |
| 85 | #define USING_HEIMDAL 1 |
| 86 | #endif |
| 87 | |
| 88 | #define AFSKEY "afs" |
| 89 | #define AFSINST "" |
| 90 | |
| 91 | #ifndef AFS_TRY_FULL_PRINC |
| 92 | #define AFS_TRY_FULL_PRINC 1 |
| 93 | #endif /* AFS_TRY_FULL_PRINC */ |
| 94 | |
| 95 | #define AKLOG_TRYAGAIN -1 |
| 96 | #define AKLOG_SUCCESS 0 |
| 97 | #define AKLOG_USAGE 1 |
| 98 | #define AKLOG_SOMETHINGSWRONG 2 |
| 99 | #define AKLOG_AFS 3 |
| 100 | #define AKLOG_KERBEROS 4 |
| 101 | #define AKLOG_TOKEN 5 |
| 102 | #define AKLOG_BADPATH 6 |
| 103 | #define AKLOG_MISC 7 |
| 104 | |
| 105 | #ifndef TRUE |
| 106 | #define TRUE 1 |
| 107 | #endif |
| 108 | |
| 109 | #ifndef FALSE |
| 110 | #define FALSE 0 |
| 111 | #endif |
| 112 | |
| 113 | #ifndef MAXSYMLINKS |
| 114 | /* RedHat 4.x doesn't seem to define this */ |
| 115 | #define MAXSYMLINKS 5 |
| 116 | #endif |
| 117 | |
| 118 | #define DIR '/' /* Character that divides directories */ |
| 119 | #define DIRSTRING "/" /* String form of above */ |
| 120 | #define VOLMARKER ':' /* Character separating cellname from mntpt */ |
| 121 | #define VOLMARKERSTRING ":" /* String form of above */ |
| 122 | |
| 123 | typedef struct { |
| 124 | char cell[BUFSIZ]; |
| 125 | char realm[REALM_SZ]; |
| 126 | } cellinfo_t; |
| 127 | |
| 128 | static krb5_ccache _krb425_ccache = NULL; |
| 129 | |
| 130 | /* |
| 131 | * Why doesn't AFS provide these prototypes? |
| 132 | */ |
| 133 | |
| 134 | extern int pioctl(char *, afs_int32, struct ViceIoctl *, afs_int32); |
| 135 | |
| 136 | /* |
| 137 | * Other prototypes |
| 138 | */ |
| 139 | |
| 140 | extern char *afs_realm_of_cell(krb5_context, struct afsconf_cell *, int); |
| 141 | static int isdir(char *, unsigned char *); |
| 142 | static krb5_error_code get_credv5(krb5_context context, char *, char *, |
| 143 | char *, krb5_creds **); |
| 144 | static int get_user_realm(krb5_context, char **); |
| 145 | |
| 146 | #define TRYAGAIN(x) (x == AKLOG_TRYAGAIN || \ |
| 147 | x == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN || \ |
| 148 | x == KRB5KRB_ERR_GENERIC) |
| 149 | |
| 150 | #if defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size) |
| 151 | |
| 152 | #define get_princ_str(c, p, n) krb5_princ_component(c, p, n)->data |
| 153 | #define get_princ_len(c, p, n) krb5_princ_component(c, p, n)->length |
| 154 | #define second_comp(c, p) (krb5_princ_size(c, p) > 1) |
| 155 | #define realm_data(c, p) krb5_princ_realm(c, p)->data |
| 156 | #define realm_len(c, p) krb5_princ_realm(c, p)->length |
| 157 | |
| 158 | #elif defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) |
| 159 | |
| 160 | #define get_princ_str(c, p, n) krb5_principal_get_comp_string(c, p, n) |
| 161 | #define get_princ_len(c, p, n) strlen(krb5_principal_get_comp_string(c, p, n)) |
| 162 | #define second_comp(c, p) (krb5_principal_get_comp_string(c, p, 1) != NULL) |
| 163 | #define realm_data(c, p) krb5_realm_data(krb5_principal_get_realm(c, p)) |
| 164 | #define realm_len(c, p) krb5_realm_length(krb5_principal_get_realm(c, p)) |
| 165 | |
| 166 | #else |
| 167 | #error "Must have either krb5_princ_size or krb5_principal_get_comp_string" |
| 168 | #endif |
| 169 | |
| 170 | #if !defined(HAVE_KRB5_ENCRYPT_TKT_PART) && defined(HAVE_ENCODE_KRB5_ENC_TKT_PART) && defined(HAVE_KRB5_C_ENCRYPT) |
| 171 | extern krb5_error_code encode_krb5_enc_tkt_part (const krb5_enc_tkt_part *rep, |
| 172 | krb5_data **code); |
| 173 | |
| 174 | krb5_error_code |
| 175 | krb5_encrypt_tkt_part(krb5_context context, |
| 176 | const krb5_keyblock *key, |
| 177 | krb5_ticket *ticket) |
| 178 | { |
| 179 | krb5_data *data = 0; |
| 180 | int code; |
| 181 | size_t enclen; |
| 182 | |
| 183 | if ((code = encode_krb5_enc_tkt_part(ticket->enc_part2, &data))) |
| 184 | goto Done; |
| 185 | if ((code = krb5_c_encrypt_length(context, key->enctype, |
| 186 | data->length, &enclen))) |
| 187 | goto Done; |
| 188 | ticket->enc_part.ciphertext.length = enclen; |
| 189 | if (!(ticket->enc_part.ciphertext.data = malloc(enclen))) { |
| 190 | code = ENOMEM; |
| 191 | goto Done; |
| 192 | } |
| 193 | if ((code = krb5_c_encrypt(context, key, KRB5_KEYUSAGE_KDC_REP_TICKET, |
| 194 | 0, data, &ticket->enc_part))) { |
| 195 | free(ticket->enc_part.ciphertext.data); |
| 196 | ticket->enc_part.ciphertext.data = 0; |
| 197 | } |
| 198 | Done: |
| 199 | if (data) { |
| 200 | if (data->data) |
| 201 | free(data->data); |
| 202 | free(data); |
| 203 | } |
| 204 | return code; |
| 205 | } |
| 206 | #endif |
| 207 | |
| 208 | #if defined(HAVE_KRB5_CREDS_KEYBLOCK) |
| 209 | |
| 210 | #define get_cred_keydata(c) c->keyblock.contents |
| 211 | #define get_cred_keylen(c) c->keyblock.length |
| 212 | #define get_creds_enctype(c) c->keyblock.enctype |
| 213 | |
| 214 | #elif defined(HAVE_KRB5_CREDS_SESSION) |
| 215 | |
| 216 | #define get_cred_keydata(c) c->session.keyvalue.data |
| 217 | #define get_cred_keylen(c) c->session.keyvalue.length |
| 218 | #define get_creds_enctype(c) c->session.keytype |
| 219 | |
| 220 | #else |
| 221 | #error "Must have either keyblock or session member of krb5_creds" |
| 222 | #endif |
| 223 | |
| 224 | /* MITKerberosShim logs but returns success */ |
| 225 | #if !defined(HAVE_KRB5_524_CONV_PRINCIPAL) || defined(AFS_DARWIN110_ENV) || (!defined(HAVE_KRB5_524_CONVERT_CREDS) && !defined(HAVE_KRB524_CONVERT_CREDS_KDC)) |
| 226 | #define HAVE_NO_KRB5_524 |
| 227 | #elif !defined(HAVE_KRB5_524_CONVERT_CREDS) && defined(HAVE_KRB524_CONVERT_CREDS_KDC) |
| 228 | #define krb5_524_convert_creds krb524_convert_creds_kdc |
| 229 | #endif |
| 230 | |
| 231 | #if USING_HEIMDAL |
| 232 | #define deref_keyblock_enctype(kb) \ |
| 233 | ((kb)->keytype) |
| 234 | |
| 235 | #define deref_entry_keyblock(entry) \ |
| 236 | entry->keyblock |
| 237 | |
| 238 | #define deref_session_key(creds) \ |
| 239 | creds->session |
| 240 | |
| 241 | #define deref_enc_tkt_addrs(tkt) \ |
| 242 | tkt->caddr |
| 243 | |
| 244 | #define deref_enc_length(enc) \ |
| 245 | ((enc)->cipher.length) |
| 246 | |
| 247 | #define deref_enc_data(enc) \ |
| 248 | ((enc)->cipher.data) |
| 249 | |
| 250 | #define krb5_free_keytab_entry_contents krb5_kt_free_entry |
| 251 | |
| 252 | #else |
| 253 | #define deref_keyblock_enctype(kb) \ |
| 254 | ((kb)->enctype) |
| 255 | |
| 256 | #define deref_entry_keyblock(entry) \ |
| 257 | entry->key |
| 258 | |
| 259 | #define deref_session_key(creds) \ |
| 260 | creds->keyblock |
| 261 | |
| 262 | #define deref_enc_tkt_addrs(tkt) \ |
| 263 | tkt->caddrs |
| 264 | |
| 265 | #define deref_enc_length(enc) \ |
| 266 | ((enc)->ciphertext.length) |
| 267 | |
| 268 | #define deref_enc_data(enc) \ |
| 269 | ((enc)->ciphertext.data) |
| 270 | |
| 271 | #endif |
| 272 | |
| 273 | #define deref_entry_enctype(entry) \ |
| 274 | deref_keyblock_enctype(&deref_entry_keyblock(entry)) |
| 275 | |
| 276 | /* |
| 277 | * Provide a replacement for strerror if we don't have it |
| 278 | */ |
| 279 | |
| 280 | #ifndef HAVE_STRERROR |
| 281 | extern char *sys_errlist[]; |
| 282 | #define strerror(x) sys_errlist[x] |
| 283 | #endif /* HAVE_STRERROR */ |
| 284 | |
| 285 | static char *progname = NULL; /* Name of this program */ |
| 286 | static int dflag = FALSE; /* Give debugging information */ |
| 287 | static int noauth = FALSE; /* If true, don't try to get tokens */ |
| 288 | static int zsubs = FALSE; /* Are we keeping track of zephyr subs? */ |
| 289 | static int hosts = FALSE; /* Are we keeping track of hosts? */ |
| 290 | static int noprdb = FALSE; /* Skip resolving name to id? */ |
| 291 | static int linked = FALSE; /* try for both AFS nodes */ |
| 292 | static int afssetpag = FALSE; /* setpag for AFS */ |
| 293 | static int force = FALSE; /* Bash identical tokens? */ |
| 294 | static int do524 = FALSE; /* Should we do 524 instead of rxkad2b? */ |
| 295 | static char *keytab = NULL; /* keytab for akimpersonate */ |
| 296 | static char *client = NULL; /* client principal for akimpersonate */ |
| 297 | static linked_list zsublist; /* List of zephyr subscriptions */ |
| 298 | static linked_list hostlist; /* List of host addresses */ |
| 299 | static linked_list authedcells; /* List of cells already logged to */ |
| 300 | |
| 301 | /* A com_error bodge. The idea here is that this routine lets us lookup |
| 302 | * things in the system com_err, if the AFS one just tells us the error |
| 303 | * is unknown |
| 304 | */ |
| 305 | |
| 306 | void |
| 307 | redirect_errors(const char *who, afs_int32 code, const char *fmt, va_list ap) |
| 308 | { |
| 309 | if (who) { |
| 310 | fputs(who, stderr); |
| 311 | fputs(": ", stderr); |
| 312 | } |
| 313 | if (code) { |
| 314 | const char *str = afs_error_message(code); |
| 315 | if (strncmp(str, "unknown", strlen("unknown")) == 0) { |
| 316 | #ifdef HAVE_KRB5_SVC_GET_MSG |
| 317 | krb5_svc_get_msg(code,&str); |
| 318 | #elif defined(HAVE_KRB5_GET_ERROR_MESSAGE) |
| 319 | krb5_context context; |
| 320 | krb5_init_context(&context); |
| 321 | str = krb5_get_error_message(context, code); |
| 322 | krb5_free_context(context); |
| 323 | #else |
| 324 | ; /* IRIX apparently has neither: use the string we have */ |
| 325 | #endif |
| 326 | } |
| 327 | fputs(str, stderr); |
| 328 | fputs(" ", stderr); |
| 329 | #ifdef HAVE_KRB5_SVC_GET_MSG |
| 330 | krb5_free_string(str); |
| 331 | #endif |
| 332 | } |
| 333 | if (fmt) { |
| 334 | vfprintf(stderr, fmt, ap); |
| 335 | } |
| 336 | putc('\n', stderr); |
| 337 | fflush(stderr); |
| 338 | } |
| 339 | |
| 340 | static void |
| 341 | afs_dprintf(char *fmt, ...) { |
| 342 | va_list ap; |
| 343 | |
| 344 | va_start(ap, fmt); |
| 345 | if (dflag) |
| 346 | vprintf(fmt, ap); |
| 347 | va_end(ap); |
| 348 | } |
| 349 | |
| 350 | static char * |
| 351 | copy_cellinfo(cellinfo_t *cellinfo) |
| 352 | { |
| 353 | cellinfo_t *new_cellinfo; |
| 354 | |
| 355 | if ((new_cellinfo = malloc(sizeof(cellinfo_t)))) |
| 356 | memcpy(new_cellinfo, cellinfo, sizeof(cellinfo_t)); |
| 357 | |
| 358 | return ((char *)new_cellinfo); |
| 359 | } |
| 360 | |
| 361 | |
| 362 | static int |
| 363 | get_cellconfig(const char *config, char *cell, |
| 364 | struct afsconf_cell *cellconfig, char **local_cell) |
| 365 | { |
| 366 | int status = AKLOG_SUCCESS; |
| 367 | struct afsconf_dir *configdir; |
| 368 | |
| 369 | memset(cellconfig, 0, sizeof(*cellconfig)); |
| 370 | |
| 371 | *local_cell = malloc(MAXCELLCHARS); |
| 372 | if (*local_cell == NULL) { |
| 373 | fprintf(stderr, "%s: can't allocate memory for local cell name\n", |
| 374 | progname); |
| 375 | exit(AKLOG_AFS); |
| 376 | } |
| 377 | |
| 378 | if (!(configdir = afsconf_Open(config))) { |
| 379 | fprintf(stderr, |
| 380 | "%s: can't get afs configuration (afsconf_Open(%s))\n", |
| 381 | progname, config); |
| 382 | exit(AKLOG_AFS); |
| 383 | } |
| 384 | |
| 385 | if (cell != NULL && cell[0] == '\0') { |
| 386 | /* Use the local cell */ |
| 387 | cell = NULL; |
| 388 | } |
| 389 | |
| 390 | /* XXX - This function modifies 'cell' by passing it through lcstring */ |
| 391 | if (afsconf_GetCellInfo(configdir, cell, NULL, cellconfig)) { |
| 392 | if (cell != NULL) { |
| 393 | fprintf(stderr, "%s: Can't get information about cell %s.\n", |
| 394 | progname, cell); |
| 395 | } else { |
| 396 | fprintf(stderr, "%s: Can't get information about the local cell.\n", |
| 397 | progname); |
| 398 | } |
| 399 | status = AKLOG_AFS; |
| 400 | } else if (afsconf_GetLocalCell(configdir, *local_cell, MAXCELLCHARS)) { |
| 401 | fprintf(stderr, "%s: can't determine local cell.\n", progname); |
| 402 | exit(AKLOG_AFS); |
| 403 | } |
| 404 | |
| 405 | afsconf_Close(configdir); |
| 406 | |
| 407 | return(status); |
| 408 | } |
| 409 | |
| 410 | static char * |
| 411 | extract_realm(krb5_context context, krb5_principal princ) { |
| 412 | int len; |
| 413 | char *realm; |
| 414 | |
| 415 | len = realm_len(context, princ); |
| 416 | if (len > REALM_SZ-1) |
| 417 | len = REALM_SZ-1; |
| 418 | |
| 419 | realm = malloc(sizeof(char) * (len+1)); |
| 420 | if (realm == NULL) |
| 421 | return NULL; |
| 422 | |
| 423 | strncpy(realm, realm_data(context, princ), len); |
| 424 | realm[len] = '\0'; |
| 425 | |
| 426 | return realm; |
| 427 | } |
| 428 | |
| 429 | static int |
| 430 | get_realm_from_cred(krb5_context context, krb5_creds *v5cred, char **realm) { |
| 431 | #if !defined(HEIMDAL) && defined(HAVE_KRB5_DECODE_TICKET) |
| 432 | krb5_error_code code; |
| 433 | krb5_ticket *ticket; |
| 434 | |
| 435 | *realm = NULL; |
| 436 | |
| 437 | code = krb5_decode_ticket(&v5cred->ticket, &ticket); |
| 438 | if (code) |
| 439 | return code; |
| 440 | |
| 441 | *realm = extract_realm(context, ticket->server); |
| 442 | if (*realm == NULL) |
| 443 | code = ENOMEM; |
| 444 | |
| 445 | krb5_free_ticket(context, ticket); |
| 446 | |
| 447 | return code; |
| 448 | #else |
| 449 | *realm = NULL; |
| 450 | return 0; |
| 451 | #endif |
| 452 | } |
| 453 | |
| 454 | /*! |
| 455 | * Get a Kerberos service ticket to use as the base of an rxkad token for |
| 456 | * a given AFS cell. |
| 457 | * |
| 458 | * @param[in] context |
| 459 | * An initialized Kerberos v5 context |
| 460 | * @param[in] realm |
| 461 | * The realm to look in for the service principal. If NULL, then the |
| 462 | * realm is determined from the cell name or the user's credentials |
| 463 | * (see below for the heuristics used) |
| 464 | * @param[in] cell |
| 465 | * The cell information for the cell to obtain a ticket for |
| 466 | * @param[out] v5cred |
| 467 | * A Kerberos credentials structure containing the ticket acquired |
| 468 | * for the cell. This is a dynamically allocated structure, which |
| 469 | * should be freed by using the appropriate Kerberos API function. |
| 470 | * @param[out] realmUsed |
| 471 | * The realm in which the cell's service principal was located. If |
| 472 | * unset, then the principal was located in the same realm as the |
| 473 | * current user. This is a malloc'd string which should be freed |
| 474 | * by the caller. |
| 475 | * |
| 476 | * @returns |
| 477 | * 0 on success, an error value upon failure |
| 478 | * |
| 479 | * @notes |
| 480 | * This code tries principals in the following, much debated, |
| 481 | * order: |
| 482 | * |
| 483 | * If the realm is specified on the command line we do |
| 484 | * - afs/cell@COMMAND-LINE-REALM |
| 485 | * - afs@COMMAND-LINE-REALM |
| 486 | * |
| 487 | * Otherwise, we do |
| 488 | * - afs/cell@REALM-FROM-USERS-PRINCIPAL |
| 489 | * - afs/cell@krb5_get_host_realm(db-server) |
| 490 | * Then, if krb5_get_host_realm(db-server) is non-empty |
| 491 | * - afs@ krb5_get_host_realm(db-server) |
| 492 | * Otherwise |
| 493 | * - afs/cell@ upper-case-domain-of-db-server |
| 494 | * - afs@ upper-case-domain-of-db-server |
| 495 | * |
| 496 | * In all cases, the 'afs@' variant is only tried where the |
| 497 | * cell and the realm match case-insensitively. |
| 498 | */ |
| 499 | |
| 500 | static int |
| 501 | rxkad_get_ticket(krb5_context context, char *realm, |
| 502 | struct afsconf_cell *cell, |
| 503 | krb5_creds **v5cred, char **realmUsed) { |
| 504 | char *realm_of_cell = NULL; |
| 505 | char *realm_of_user = NULL; |
| 506 | char *realm_from_princ = NULL; |
| 507 | int status; |
| 508 | int retry; |
| 509 | |
| 510 | *realmUsed = NULL; |
| 511 | |
| 512 | if ((status = get_user_realm(context, &realm_of_user))) { |
| 513 | fprintf(stderr, "%s: Couldn't determine realm of user:", progname); |
| 514 | afs_com_err(progname, status, " while getting realm"); |
| 515 | status = AKLOG_KERBEROS; |
| 516 | goto out; |
| 517 | } |
| 518 | |
| 519 | retry = 1; |
| 520 | |
| 521 | while(retry) { |
| 522 | /* Cell on command line - use that one */ |
| 523 | if (realm && realm[0]) { |
| 524 | realm_of_cell = realm; |
| 525 | status = AKLOG_TRYAGAIN; |
| 526 | afs_dprintf("We were told to authenticate to realm %s.\n", realm); |
| 527 | } else { |
| 528 | /* Initially, try using afs/cell@USERREALM */ |
| 529 | afs_dprintf("Trying to authenticate to user's realm %s.\n", |
| 530 | realm_of_user); |
| 531 | realm_of_cell = realm_of_user; |
| 532 | status = get_credv5(context, AFSKEY, cell->name, realm_of_cell, |
| 533 | v5cred); |
| 534 | |
| 535 | /* If that failed, try to determine the realm from the name of |
| 536 | * one of the DB servers */ |
| 537 | if (TRYAGAIN(status)) { |
| 538 | realm_of_cell = afs_realm_of_cell(context, cell, FALSE); |
| 539 | if (!realm_of_cell) { |
| 540 | fprintf(stderr, "%s: Couldn't figure out realm for cell " |
| 541 | "%s.\n", progname, cell->name); |
| 542 | exit(AKLOG_MISC); |
| 543 | } |
| 544 | |
| 545 | if (realm_of_cell[0]) |
| 546 | afs_dprintf("We've deduced that we need to authenticate" |
| 547 | " to realm %s.\n", realm_of_cell); |
| 548 | else |
| 549 | afs_dprintf("We've deduced that we need to authenticate " |
| 550 | "using referrals.\n"); |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | if (TRYAGAIN(status)) { |
| 555 | /* If we've got the full-princ-first option, or we're in a |
| 556 | * different realm from the cell - use the cell name as the |
| 557 | * instance */ |
| 558 | if (AFS_TRY_FULL_PRINC || |
| 559 | strcasecmp(cell->name, realm_of_cell)!=0) { |
| 560 | status = get_credv5(context, AFSKEY, cell->name, |
| 561 | realm_of_cell, v5cred); |
| 562 | |
| 563 | /* If we failed & we've got an empty realm, then try |
| 564 | * calling afs_realm_for_cell again. */ |
| 565 | if (TRYAGAIN(status) && !realm_of_cell[0]) { |
| 566 | /* This time, get the realm by taking the domain |
| 567 | * component of the db server and make it upper case */ |
| 568 | realm_of_cell = afs_realm_of_cell(context, cell, TRUE); |
| 569 | if (!realm_of_cell) { |
| 570 | fprintf(stderr, |
| 571 | "%s: Couldn't figure out realm for cell %s.\n", |
| 572 | progname, cell->name); |
| 573 | exit(AKLOG_MISC); |
| 574 | } |
| 575 | afs_dprintf("We've deduced that we need to authenticate" |
| 576 | " to realm %s.\n", realm_of_cell); |
| 577 | status = get_credv5(context, AFSKEY, cell->name, |
| 578 | realm_of_cell, v5cred); |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | /* If the realm and cell name match, then try without an |
| 583 | * instance, but only if realm is non-empty */ |
| 584 | |
| 585 | if (TRYAGAIN(status) && |
| 586 | strcasecmp(cell->name, realm_of_cell) == 0) { |
| 587 | status = get_credv5(context, AFSKEY, NULL, realm_of_cell, |
| 588 | v5cred); |
| 589 | if (!AFS_TRY_FULL_PRINC && TRYAGAIN(status)) { |
| 590 | status = get_credv5(context, AFSKEY, cell->name, |
| 591 | realm_of_cell, v5cred); |
| 592 | } |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | /* Try to find a service principal for this cell. |
| 597 | * Some broken MIT libraries return KRB5KRB_AP_ERR_MSG_TYPE upon |
| 598 | * the first attempt, so we try twice to be sure */ |
| 599 | |
| 600 | if (status == KRB5KRB_AP_ERR_MSG_TYPE && retry == 1) |
| 601 | retry++; |
| 602 | else |
| 603 | retry = 0; |
| 604 | } |
| 605 | |
| 606 | if (status != 0) { |
| 607 | afs_dprintf("Kerberos error code returned by get_cred : %d\n", status); |
| 608 | fprintf(stderr, "%s: Couldn't get %s AFS tickets:\n", |
| 609 | progname, cell->name); |
| 610 | afs_com_err(progname, status, "while getting AFS tickets"); |
| 611 | #ifdef KRB5_CC_NOT_KTYPE |
| 612 | if (status == KRB5_CC_NOT_KTYPE) { |
| 613 | fprintf(stderr, "allow_weak_crypto may be required in the Kerberos configuration\n"); |
| 614 | } |
| 615 | #endif |
| 616 | status = AKLOG_KERBEROS; |
| 617 | goto out; |
| 618 | } |
| 619 | |
| 620 | /* If we've got a valid ticket, and we still don't know the realm name |
| 621 | * try to figure it out from the contents of the ticket |
| 622 | */ |
| 623 | if (strcmp(realm_of_cell, "") == 0) { |
| 624 | status = get_realm_from_cred(context, *v5cred, &realm_from_princ); |
| 625 | if (status) { |
| 626 | fprintf(stderr, |
| 627 | "%s: Couldn't decode ticket to determine realm for " |
| 628 | "cell %s.\n", |
| 629 | progname, cell->name); |
| 630 | } else { |
| 631 | if (realm_from_princ) |
| 632 | realm_of_cell = realm_from_princ; |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | /* If the realm of the user and cell differ, then we need to use the |
| 637 | * realm when we later construct the user's principal */ |
| 638 | if (realm_of_cell != NULL && strcmp(realm_of_user, realm_of_cell) != 0) |
| 639 | *realmUsed = realm_of_user; |
| 640 | |
| 641 | out: |
| 642 | if (realm_from_princ) |
| 643 | free(realm_from_princ); |
| 644 | if (realm_of_user && *realmUsed == NULL) |
| 645 | free(realm_of_user); |
| 646 | |
| 647 | return status; |
| 648 | } |
| 649 | |
| 650 | /*! |
| 651 | * Build an rxkad token from a Kerberos ticket, using only local tools (that |
| 652 | * is, without using a 524 conversion service) |
| 653 | * |
| 654 | * @param[in] context |
| 655 | * An initialised Kerberos 5 context |
| 656 | * @param[in] v5cred |
| 657 | * A Kerberos credentials structure containing a suitable service ticket |
| 658 | * @param[out] tokenPtr |
| 659 | * An AFS token structure containing an rxkad token. This is a malloc'd |
| 660 | * structure which should be freed by the caller. |
| 661 | * @param[out[ userPtr |
| 662 | * A string containing the principal of the user to whom the token was |
| 663 | * issued. This is a malloc'd block which should be freed by the caller, |
| 664 | * if set. |
| 665 | * |
| 666 | * @returns |
| 667 | * 0 on success, an error value upon failure |
| 668 | */ |
| 669 | static int |
| 670 | rxkad_build_native_token(krb5_context context, krb5_creds *v5cred, |
| 671 | struct ktc_tokenUnion **tokenPtr, char **userPtr) { |
| 672 | char username[BUFSIZ]=""; |
| 673 | struct ktc_token token; |
| 674 | int status; |
| 675 | #ifdef HAVE_NO_KRB5_524 |
| 676 | char *p; |
| 677 | int len; |
| 678 | #else |
| 679 | char k4name[ANAME_SZ]; |
| 680 | char k4inst[INST_SZ]; |
| 681 | char k4realm[REALM_SZ]; |
| 682 | #endif |
| 683 | void *inkey = get_cred_keydata(v5cred); |
| 684 | size_t inkey_sz = get_cred_keylen(v5cred); |
| 685 | |
| 686 | afs_dprintf("Using Kerberos V5 ticket natively\n"); |
| 687 | |
| 688 | *tokenPtr = NULL; |
| 689 | *userPtr = NULL; |
| 690 | |
| 691 | #ifndef HAVE_NO_KRB5_524 |
| 692 | status = krb5_524_conv_principal (context, v5cred->client, |
| 693 | (char *) &k4name, |
| 694 | (char *) &k4inst, |
| 695 | (char *) &k4realm); |
| 696 | if (status) { |
| 697 | if (!noprdb) |
| 698 | afs_com_err(progname, status, |
| 699 | "while converting principal to Kerberos V4 format"); |
| 700 | } else { |
| 701 | strcpy (username, k4name); |
| 702 | if (k4inst[0]) { |
| 703 | strcat (username, "."); |
| 704 | strcat (username, k4inst); |
| 705 | } |
| 706 | } |
| 707 | #else |
| 708 | len = min(get_princ_len(context, v5cred->client, 0), |
| 709 | second_comp(context, v5cred->client) ? |
| 710 | MAXKTCNAMELEN - 2 : MAXKTCNAMELEN - 1); |
| 711 | strncpy(username, get_princ_str(context, v5cred->client, 0), len); |
| 712 | username[len] = '\0'; |
| 713 | |
| 714 | if (second_comp(context, v5cred->client)) { |
| 715 | strcat(username, "."); |
| 716 | p = username + strlen(username); |
| 717 | len = min(get_princ_len(context, v5cred->client, 1), |
| 718 | MAXKTCNAMELEN - strlen(username) - 1); |
| 719 | strncpy(p, get_princ_str(context, v5cred->client, 1), len); |
| 720 | p[len] = '\0'; |
| 721 | } |
| 722 | #endif |
| 723 | |
| 724 | memset(&token, 0, sizeof(struct ktc_token)); |
| 725 | |
| 726 | token.kvno = RXKAD_TKT_TYPE_KERBEROS_V5; |
| 727 | token.startTime = v5cred->times.starttime;; |
| 728 | token.endTime = v5cred->times.endtime; |
| 729 | if (tkt_DeriveDesKey(get_creds_enctype(v5cred), inkey, inkey_sz, |
| 730 | &token.sessionKey) != 0) { |
| 731 | return RXKADBADKEY; |
| 732 | } |
| 733 | token.ticketLen = v5cred->ticket.length; |
| 734 | memcpy(token.ticket, v5cred->ticket.data, token.ticketLen); |
| 735 | |
| 736 | status = token_importRxkadViceId(tokenPtr, &token, 0); |
| 737 | if (status) { |
| 738 | return status; |
| 739 | } |
| 740 | |
| 741 | if (username[0] != '\0') |
| 742 | *userPtr = strdup(username); |
| 743 | |
| 744 | return 0; |
| 745 | } |
| 746 | |
| 747 | /*! |
| 748 | * Convert a Keberos ticket to an rxkad token, using information obtained |
| 749 | * from an external Kerberos 5->4 conversion service. If the code is built |
| 750 | * with HAVE_NO_KRB5_524 then this is a stub function which will always |
| 751 | * return success without a token. |
| 752 | * |
| 753 | * @param[in] context |
| 754 | * An initialised Kerberos 5 context |
| 755 | * @param[in] v5cred |
| 756 | * A Kerberos credentials structure containing a suitable service ticket |
| 757 | * @param[out] tokenPtr |
| 758 | * An AFS token structure containing an rxkad token. This is a malloc'd |
| 759 | * structure which should be freed by the caller. |
| 760 | * @param[out[ userPtr |
| 761 | * A string containing the principal of the user to whom the token was |
| 762 | * issued. This is a malloc'd block which should be freed by the caller, |
| 763 | * if set. |
| 764 | * |
| 765 | * @returns |
| 766 | * 0 on success, an error value upon failure |
| 767 | */ |
| 768 | |
| 769 | #ifdef HAVE_NO_KRB5_524 |
| 770 | static int |
| 771 | rxkad_get_converted_token(krb5_context context, krb5_creds *v5cred, |
| 772 | struct ktc_tokenUnion **tokenPtr, char **userPtr) { |
| 773 | *tokenPtr = NULL; |
| 774 | *userPtr = NULL; |
| 775 | |
| 776 | return 0; |
| 777 | } |
| 778 | #else |
| 779 | static int |
| 780 | rxkad_get_converted_token(krb5_context context, krb5_creds *v5cred, |
| 781 | struct ktc_tokenUnion **tokenPtr, char **userPtr) { |
| 782 | CREDENTIALS cred; |
| 783 | char username[BUFSIZ]; |
| 784 | struct ktc_token token; |
| 785 | int status; |
| 786 | |
| 787 | *tokenPtr = NULL; |
| 788 | *userPtr = NULL; |
| 789 | |
| 790 | afs_dprintf("Using Kerberos 524 translator service\n"); |
| 791 | |
| 792 | status = krb5_524_convert_creds(context, v5cred, &cred); |
| 793 | |
| 794 | if (status) { |
| 795 | afs_com_err(progname, status, "while converting tickets " |
| 796 | "to Kerberos V4 format"); |
| 797 | return AKLOG_KERBEROS; |
| 798 | } |
| 799 | |
| 800 | strcpy (username, cred.pname); |
| 801 | if (cred.pinst[0]) { |
| 802 | strcat (username, "."); |
| 803 | strcat (username, cred.pinst); |
| 804 | } |
| 805 | |
| 806 | memset(&token, 0, sizeof(struct ktc_token)); |
| 807 | |
| 808 | token.kvno = cred.kvno; |
| 809 | token.startTime = cred.issue_date; |
| 810 | /* |
| 811 | * It seems silly to go through a bunch of contortions to |
| 812 | * extract the expiration time, when the v5 credentials already |
| 813 | * has the exact time! Let's use that instead. |
| 814 | * |
| 815 | * Note that this isn't a security hole, as the expiration time |
| 816 | * is also contained in the encrypted token |
| 817 | */ |
| 818 | token.endTime = v5cred->times.endtime; |
| 819 | memcpy(&token.sessionKey, cred.session, 8); |
| 820 | token.ticketLen = cred.ticket_st.length; |
| 821 | memcpy(token.ticket, cred.ticket_st.dat, token.ticketLen); |
| 822 | |
| 823 | status = token_importRxkadViceId(tokenPtr, &token, 0); |
| 824 | if (status) { |
| 825 | return status; |
| 826 | } |
| 827 | |
| 828 | *userPtr = strdup(username); |
| 829 | |
| 830 | return 0; |
| 831 | } |
| 832 | #endif |
| 833 | |
| 834 | /*! |
| 835 | * This function gets an rxkad token for a given cell. |
| 836 | * |
| 837 | * @param[in] context |
| 838 | * An initialized Kerberos v5 context |
| 839 | * @param[in] cell |
| 840 | * The cell information for the cell which we're obtaining a token for |
| 841 | * @param[in] realm |
| 842 | * The realm to look in for the service principal. If NULL, then the |
| 843 | * realm is determined from the cell name or the user's credentials |
| 844 | * (see the documentation for rxkad_get_ticket) |
| 845 | * @param[out] token |
| 846 | * The rxkad token produced. This is a malloc'd structure which should |
| 847 | * be freed by the caller. |
| 848 | * @parma[out] authuser |
| 849 | * A string containing the principal of the user to whom the token was |
| 850 | * issued. This is a malloc'd block which should be freed by the caller, |
| 851 | * if set. |
| 852 | * @param[out] foreign |
| 853 | * Whether the user is considered as 'foreign' to the realm of the cell. |
| 854 | * |
| 855 | * @returns |
| 856 | * 0 on success, an error value upon failuer |
| 857 | */ |
| 858 | static int |
| 859 | rxkad_get_token(krb5_context context, struct afsconf_cell *cell, char *realm, |
| 860 | struct ktc_tokenUnion **token, char **authuser, int *foreign) { |
| 861 | krb5_creds *v5cred; |
| 862 | char *realmUsed = NULL; |
| 863 | char *username = NULL; |
| 864 | int status; |
| 865 | |
| 866 | *token = NULL; |
| 867 | *authuser = NULL; |
| 868 | *foreign = 0; |
| 869 | |
| 870 | status = rxkad_get_ticket(context, realm, cell, &v5cred, &realmUsed); |
| 871 | if (status) |
| 872 | return status; |
| 873 | |
| 874 | if (do524) |
| 875 | status = rxkad_get_converted_token(context, v5cred, token, &username); |
| 876 | else |
| 877 | status = rxkad_build_native_token(context, v5cred, token, &username); |
| 878 | |
| 879 | if (status) |
| 880 | goto out; |
| 881 | |
| 882 | /* We now have the username, plus the realm name, so stitch them together |
| 883 | * to give us the name that the ptserver will know the user by */ |
| 884 | if (realmUsed == NULL || username == NULL) { |
| 885 | *authuser = username; |
| 886 | username = NULL; |
| 887 | *foreign = 0; |
| 888 | } else { |
| 889 | if (asprintf(authuser, "%s@%s", username, realmUsed) < 0) { |
| 890 | fprintf(stderr, "%s: Out of memory building PTS name\n", progname); |
| 891 | *authuser = NULL; |
| 892 | status = AKLOG_MISC; |
| 893 | goto out; |
| 894 | } |
| 895 | *foreign = 1; |
| 896 | } |
| 897 | |
| 898 | out: |
| 899 | if (realmUsed) |
| 900 | free(realmUsed); |
| 901 | if (username) |
| 902 | free(username); |
| 903 | |
| 904 | return status; |
| 905 | } |
| 906 | |
| 907 | /* |
| 908 | * Log to a cell. If the cell has already been logged to, return without |
| 909 | * doing anything. Otherwise, log to it and mark that it has been logged |
| 910 | * to. |
| 911 | */ |
| 912 | static int |
| 913 | auth_to_cell(krb5_context context, const char *config, |
| 914 | char *cell, char *realm, char **linkedcell) |
| 915 | { |
| 916 | int status = AKLOG_SUCCESS; |
| 917 | int isForeign = 0; |
| 918 | char *username = NULL; /* To hold client username structure */ |
| 919 | afs_int32 viceId; /* AFS uid of user */ |
| 920 | |
| 921 | char *local_cell = NULL; |
| 922 | struct ktc_tokenUnion *rxkadToken = NULL; |
| 923 | struct ktc_setTokenData *token; |
| 924 | struct ktc_setTokenData *btoken = NULL; |
| 925 | struct afsconf_cell cellconf; |
| 926 | |
| 927 | /* NULL or empty cell returns information on local cell */ |
| 928 | if ((status = get_cellconfig(config, cell, &cellconf, &local_cell))) |
| 929 | return(status); |
| 930 | |
| 931 | if (linkedcell != NULL) { |
| 932 | if (cellconf.linkedCell != NULL) { |
| 933 | *linkedcell = strdup(cellconf.linkedCell); |
| 934 | if (*linkedcell == NULL) { |
| 935 | status = ENOMEM; |
| 936 | goto out; |
| 937 | } |
| 938 | } else { |
| 939 | *linkedcell = NULL; |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | if (ll_string(&authedcells, ll_s_check, cellconf.name)) { |
| 944 | afs_dprintf("Already authenticated to %s (or tried to)\n", cellconf.name); |
| 945 | status = AKLOG_SUCCESS; |
| 946 | goto out; |
| 947 | } |
| 948 | |
| 949 | /* |
| 950 | * Record that we have attempted to log to this cell. We do this |
| 951 | * before we try rather than after so that we will not try |
| 952 | * and fail repeatedly for one cell. |
| 953 | */ |
| 954 | ll_string(&authedcells, ll_s_add, cellconf.name); |
| 955 | |
| 956 | /* |
| 957 | * Record this cell in the list of zephyr subscriptions. We may |
| 958 | * want zephyr subscriptions even if authentication fails. |
| 959 | * If this is done after we attempt to get tokens, aklog -zsubs |
| 960 | * can return something different depending on whether or not we |
| 961 | * are in -noauth mode. |
| 962 | */ |
| 963 | if (ll_string(&zsublist, ll_s_add, cellconf.name) == LL_FAILURE) { |
| 964 | fprintf(stderr, |
| 965 | "%s: failure adding cell %s to zephyr subscriptions list.\n", |
| 966 | progname, cellconf.name); |
| 967 | exit(AKLOG_MISC); |
| 968 | } |
| 969 | if (ll_string(&zsublist, ll_s_add, local_cell) == LL_FAILURE) { |
| 970 | fprintf(stderr, |
| 971 | "%s: failure adding cell %s to zephyr subscriptions list.\n", |
| 972 | progname, local_cell); |
| 973 | exit(AKLOG_MISC); |
| 974 | } |
| 975 | |
| 976 | if (!noauth) { |
| 977 | afs_dprintf("Authenticating to cell %s (server %s).\n", cellconf.name, |
| 978 | cellconf.hostName[0]); |
| 979 | |
| 980 | token = token_buildTokenJar(cellconf.name); |
| 981 | if (token == NULL) { |
| 982 | status = ENOMEM; |
| 983 | goto out; |
| 984 | } |
| 985 | |
| 986 | status = rxkad_get_token(context, &cellconf, realm, &rxkadToken, |
| 987 | &username, &isForeign); |
| 988 | if (status) |
| 989 | goto out; |
| 990 | |
| 991 | /* We need to keep the token structure around so that we can stick |
| 992 | * the viceId into it (once we know it) */ |
| 993 | status = token_addToken(token, rxkadToken); |
| 994 | if (status) { |
| 995 | afs_dprintf("Add Token failed with %d", status); |
| 996 | goto out; |
| 997 | } |
| 998 | |
| 999 | if (!force && |
| 1000 | ktc_GetTokenEx(cellconf.name, &btoken) == 0 && |
| 1001 | token_SetsEquivalent(token, btoken)) { |
| 1002 | |
| 1003 | token_FreeSet(&btoken); |
| 1004 | afs_dprintf("Identical tokens already exist; skipping.\n"); |
| 1005 | status = AKLOG_SUCCESS; |
| 1006 | goto out; |
| 1007 | } |
| 1008 | |
| 1009 | if (btoken) |
| 1010 | token_FreeSet(&btoken); |
| 1011 | |
| 1012 | #ifdef FORCE_NOPRDB |
| 1013 | noprdb = 1; |
| 1014 | #endif |
| 1015 | |
| 1016 | if (username == NULL) { |
| 1017 | afs_dprintf("Not resolving name to id\n"); |
| 1018 | } |
| 1019 | else if (noprdb) { |
| 1020 | afs_dprintf("Not resolving name %s to id (-noprdb set)\n", username); |
| 1021 | } |
| 1022 | else { |
| 1023 | afs_dprintf("About to resolve name %s to id in cell %s.\n", username, |
| 1024 | cellconf.name); |
| 1025 | |
| 1026 | if (!pr_Initialize (0, AFSDIR_CLIENT_ETC_DIRPATH, cellconf.name)) |
| 1027 | status = pr_SNameToId (username, &viceId); |
| 1028 | |
| 1029 | if (status) |
| 1030 | afs_dprintf("Error %d\n", status); |
| 1031 | else |
| 1032 | afs_dprintf("Id %d\n", (int) viceId); |
| 1033 | |
| 1034 | |
| 1035 | /* |
| 1036 | * This code is taken from cklog -- it lets people |
| 1037 | * automatically register with the ptserver in foreign cells |
| 1038 | */ |
| 1039 | |
| 1040 | #ifdef ALLOW_REGISTER |
| 1041 | if ((status == 0) && (viceId == ANONYMOUSID) && isForeign) { |
| 1042 | afs_dprintf("doing first-time registration of %s at %s\n", |
| 1043 | username, cellconf.name); |
| 1044 | viceId = 0; |
| 1045 | |
| 1046 | status = ktc_SetTokenEx(token); |
| 1047 | if (status) { |
| 1048 | afs_com_err(progname, status, |
| 1049 | "while obtaining tokens for cell %s", |
| 1050 | cellconf.name); |
| 1051 | status = AKLOG_TOKEN; |
| 1052 | } |
| 1053 | |
| 1054 | /* |
| 1055 | * In case you're wondering, we don't need to change the |
| 1056 | * filename here because we're still connecting to the |
| 1057 | * same cell -- we're just using a different authenticat ion |
| 1058 | * level |
| 1059 | */ |
| 1060 | |
| 1061 | if ((status = pr_Initialize(1L, AFSDIR_CLIENT_ETC_DIRPATH, |
| 1062 | cellconf.name))) { |
| 1063 | printf("Error %d\n", status); |
| 1064 | } |
| 1065 | |
| 1066 | if ((status = pr_CreateUser(username, &viceId))) { |
| 1067 | fprintf(stderr, "%s: %s so unable to create remote PTS " |
| 1068 | "user %s in cell %s (status: %d).\n", progname, |
| 1069 | afs_error_message(status), username, cellconf.name, |
| 1070 | status); |
| 1071 | viceId = ANONYMOUSID; |
| 1072 | } else { |
| 1073 | printf("created cross-cell entry for %s (Id %d) at %s\n", |
| 1074 | username, viceId, cellconf.name); |
| 1075 | } |
| 1076 | } |
| 1077 | #endif /* ALLOW_REGISTER */ |
| 1078 | |
| 1079 | if ((status == 0) && (viceId != ANONYMOUSID)) { |
| 1080 | status = token_setRxkadViceId(rxkadToken, viceId); |
| 1081 | if (status) { |
| 1082 | fprintf(stderr, "Error %d setting rxkad ViceId\n", status); |
| 1083 | status = AKLOG_SUCCESS; |
| 1084 | } else { |
| 1085 | token_replaceToken(token, rxkadToken); |
| 1086 | } |
| 1087 | } |
| 1088 | } |
| 1089 | |
| 1090 | if (username) { |
| 1091 | afs_dprintf("Setting tokens. %s @ %s\n", |
| 1092 | username, cellconf.name); |
| 1093 | } else { |
| 1094 | afs_dprintf("Setting tokens for cell %s\n", cellconf.name); |
| 1095 | } |
| 1096 | |
| 1097 | #ifndef AFS_AIX51_ENV |
| 1098 | /* on AIX 4.1.4 with AFS 3.4a+ if a write is not done before |
| 1099 | * this routine, it will not add the token. It is not clear what |
| 1100 | * is going on here! So we will do the following operation. |
| 1101 | * On AIX 5, it causes the parent program to die, so we won't. |
| 1102 | * We don't care about the return value, but need to collect it |
| 1103 | * to avoid compiler warnings. |
| 1104 | */ |
| 1105 | if (write(2,"",0) < 0) { |
| 1106 | /* dummy write, don't care */ |
| 1107 | } |
| 1108 | #endif |
| 1109 | token_setPag(token, afssetpag); |
| 1110 | status = ktc_SetTokenEx(token); |
| 1111 | if (status) { |
| 1112 | afs_com_err(progname, status, "while setting tokens for cell %s", |
| 1113 | cellconf.name); |
| 1114 | status = AKLOG_TOKEN; |
| 1115 | } |
| 1116 | } |
| 1117 | else |
| 1118 | afs_dprintf("Noauth mode; not authenticating.\n"); |
| 1119 | |
| 1120 | out: |
| 1121 | if (rxkadToken) { |
| 1122 | token_freeToken(&rxkadToken); |
| 1123 | } |
| 1124 | |
| 1125 | if (local_cell) |
| 1126 | free(local_cell); |
| 1127 | if (username) |
| 1128 | free(username); |
| 1129 | |
| 1130 | return(status); |
| 1131 | } |
| 1132 | |
| 1133 | static int |
| 1134 | get_afs_mountpoint(char *file, char *mountpoint, int size) |
| 1135 | { |
| 1136 | #ifdef AFS_SUN_ENV |
| 1137 | char V ='V'; /* AFS has problem on Sun with pioctl */ |
| 1138 | #endif |
| 1139 | char our_file[MAXPATHLEN + 1]; |
| 1140 | char *parent_dir; |
| 1141 | char *last_component; |
| 1142 | struct ViceIoctl vio; |
| 1143 | char cellname[BUFSIZ]; |
| 1144 | |
| 1145 | strlcpy(our_file, file, sizeof(our_file)); |
| 1146 | |
| 1147 | if ((last_component = strrchr(our_file, DIR))) { |
| 1148 | *last_component++ = 0; |
| 1149 | parent_dir = our_file; |
| 1150 | } |
| 1151 | else { |
| 1152 | last_component = our_file; |
| 1153 | parent_dir = "."; |
| 1154 | } |
| 1155 | |
| 1156 | memset(cellname, 0, sizeof(cellname)); |
| 1157 | |
| 1158 | vio.in = last_component; |
| 1159 | vio.in_size = strlen(last_component)+1; |
| 1160 | vio.out_size = size; |
| 1161 | vio.out = mountpoint; |
| 1162 | |
| 1163 | if (!pioctl(parent_dir, VIOC_AFS_STAT_MT_PT, &vio, 0)) { |
| 1164 | if (strchr(mountpoint, VOLMARKER) == NULL) { |
| 1165 | vio.in = file; |
| 1166 | vio.in_size = strlen(file) + 1; |
| 1167 | vio.out_size = sizeof(cellname); |
| 1168 | vio.out = cellname; |
| 1169 | |
| 1170 | if (!pioctl(file, VIOC_FILE_CELL_NAME, &vio, 1)) { |
| 1171 | strlcat(cellname, VOLMARKERSTRING, sizeof(cellname)); |
| 1172 | strlcat(cellname, mountpoint + 1, sizeof(cellname)); |
| 1173 | memset(mountpoint + 1, 0, size - 1); |
| 1174 | strcpy(mountpoint + 1, cellname); |
| 1175 | } |
| 1176 | } |
| 1177 | return(TRUE); |
| 1178 | } |
| 1179 | else |
| 1180 | return(FALSE); |
| 1181 | } |
| 1182 | |
| 1183 | /* |
| 1184 | * This routine each time it is called returns the next directory |
| 1185 | * down a pathname. It resolves all symbolic links. The first time |
| 1186 | * it is called, it should be called with the name of the path |
| 1187 | * to be descended. After that, it should be called with the arguemnt |
| 1188 | * NULL. |
| 1189 | */ |
| 1190 | static char * |
| 1191 | next_path(char *origpath) |
| 1192 | { |
| 1193 | static char path[MAXPATHLEN + 1]; |
| 1194 | static char pathtocheck[MAXPATHLEN + 1]; |
| 1195 | |
| 1196 | ssize_t link; /* Return value from readlink */ |
| 1197 | char linkbuf[MAXPATHLEN + 1]; |
| 1198 | char tmpbuf[MAXPATHLEN + 1]; |
| 1199 | |
| 1200 | static char *last_comp; /* last component of directory name */ |
| 1201 | static char *elast_comp; /* End of last component */ |
| 1202 | char *t; |
| 1203 | int len; |
| 1204 | |
| 1205 | static int symlinkcount = 0; /* We can't exceed MAXSYMLINKS */ |
| 1206 | |
| 1207 | /* If we are given something for origpath, we are initializing only. */ |
| 1208 | if (origpath) { |
| 1209 | memset(path, 0, sizeof(path)); |
| 1210 | memset(pathtocheck, 0, sizeof(pathtocheck)); |
| 1211 | strlcpy(path, origpath, sizeof(path)); |
| 1212 | last_comp = path; |
| 1213 | symlinkcount = 0; |
| 1214 | return(NULL); |
| 1215 | } |
| 1216 | |
| 1217 | /* We were not given origpath; find then next path to check */ |
| 1218 | |
| 1219 | /* If we've gotten all the way through already, return NULL */ |
| 1220 | if (last_comp == NULL) |
| 1221 | return(NULL); |
| 1222 | |
| 1223 | do { |
| 1224 | while (*last_comp == DIR) |
| 1225 | strncat(pathtocheck, last_comp++, 1); |
| 1226 | len = (elast_comp = strchr(last_comp, DIR)) |
| 1227 | ? elast_comp - last_comp : strlen(last_comp); |
| 1228 | strncat(pathtocheck, last_comp, len); |
| 1229 | memset(linkbuf, 0, sizeof(linkbuf)); |
| 1230 | link = readlink(pathtocheck, linkbuf, sizeof(linkbuf)-1); |
| 1231 | |
| 1232 | if (link > 0) { |
| 1233 | linkbuf[link] = '\0'; /* NUL terminate string */ |
| 1234 | |
| 1235 | if (++symlinkcount > MAXSYMLINKS) { |
| 1236 | fprintf(stderr, "%s: %s\n", progname, strerror(ELOOP)); |
| 1237 | exit(AKLOG_BADPATH); |
| 1238 | } |
| 1239 | |
| 1240 | memset(tmpbuf, 0, sizeof(tmpbuf)); |
| 1241 | if (elast_comp) |
| 1242 | strlcpy(tmpbuf, elast_comp, sizeof(tmpbuf)); |
| 1243 | if (linkbuf[0] == DIR) { |
| 1244 | /* |
| 1245 | * If this is a symbolic link to an absolute path, |
| 1246 | * replace what we have by the absolute path. |
| 1247 | */ |
| 1248 | memset(path, 0, strlen(path)); |
| 1249 | memcpy(path, linkbuf, sizeof(linkbuf)); |
| 1250 | strcat(path, tmpbuf); |
| 1251 | last_comp = path; |
| 1252 | elast_comp = NULL; |
| 1253 | memset(pathtocheck, 0, sizeof(pathtocheck)); |
| 1254 | } |
| 1255 | else { |
| 1256 | /* |
| 1257 | * If this is a symbolic link to a relative path, |
| 1258 | * replace only the last component with the link name. |
| 1259 | */ |
| 1260 | strncpy(last_comp, linkbuf, strlen(linkbuf) + 1); |
| 1261 | strcat(path, tmpbuf); |
| 1262 | elast_comp = NULL; |
| 1263 | if ((t = strrchr(pathtocheck, DIR))) { |
| 1264 | t++; |
| 1265 | memset(t, 0, strlen(t)); |
| 1266 | } |
| 1267 | else |
| 1268 | memset(pathtocheck, 0, sizeof(pathtocheck)); |
| 1269 | } |
| 1270 | } |
| 1271 | else |
| 1272 | last_comp = elast_comp; |
| 1273 | } |
| 1274 | while(link > 0); |
| 1275 | |
| 1276 | return(pathtocheck); |
| 1277 | } |
| 1278 | |
| 1279 | static void |
| 1280 | add_hosts(char *file) |
| 1281 | { |
| 1282 | #ifdef AFS_SUN_ENV |
| 1283 | char V = 'V'; /* AFS has problem on SunOS */ |
| 1284 | #endif |
| 1285 | struct ViceIoctl vio; |
| 1286 | char outbuf[BUFSIZ]; |
| 1287 | long *phosts; |
| 1288 | int i; |
| 1289 | struct hostent *hp; |
| 1290 | struct in_addr in; |
| 1291 | |
| 1292 | memset(outbuf, 0, sizeof(outbuf)); |
| 1293 | |
| 1294 | vio.out_size = sizeof(outbuf); |
| 1295 | vio.in_size = 0; |
| 1296 | vio.out = outbuf; |
| 1297 | |
| 1298 | afs_dprintf("Getting list of hosts for %s\n", file); |
| 1299 | |
| 1300 | /* Don't worry about errors. */ |
| 1301 | if (!pioctl(file, VIOCWHEREIS, &vio, 1)) { |
| 1302 | phosts = (long *) outbuf; |
| 1303 | |
| 1304 | /* |
| 1305 | * Lists hosts that we care about. If ALLHOSTS is defined, |
| 1306 | * then all hosts that you ever may possible go through are |
| 1307 | * included in this list. If not, then only hosts that are |
| 1308 | * the only ones appear. That is, if a volume you must use |
| 1309 | * is replaced on only one server, that server is included. |
| 1310 | * If it is replicated on many servers, then none are included. |
| 1311 | * This is not perfect, but the result is that people don't |
| 1312 | * get subscribed to a lot of instances of FILSRV that they |
| 1313 | * probably won't need which reduces the instances of |
| 1314 | * people getting messages that don't apply to them. |
| 1315 | */ |
| 1316 | #ifndef ALLHOSTS |
| 1317 | if (phosts[1] != '\0') |
| 1318 | return; |
| 1319 | #endif |
| 1320 | for (i = 0; phosts[i]; i++) { |
| 1321 | if (hosts) { |
| 1322 | in.s_addr = phosts[i]; |
| 1323 | afs_dprintf("Got host %s\n", inet_ntoa(in)); |
| 1324 | ll_string(&hostlist, ll_s_add, (char *)inet_ntoa(in)); |
| 1325 | } |
| 1326 | if (zsubs && (hp=gethostbyaddr((char *) &phosts[i],sizeof(long),AF_INET))) { |
| 1327 | afs_dprintf("Got host %s\n", hp->h_name); |
| 1328 | ll_string(&zsublist, ll_s_add, hp->h_name); |
| 1329 | } |
| 1330 | } |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | /* |
| 1335 | * This routine descends through a path to a directory, logging to |
| 1336 | * every cell it encounters along the way. |
| 1337 | */ |
| 1338 | static int |
| 1339 | auth_to_path(krb5_context context, const char *config, char *path) |
| 1340 | { |
| 1341 | int status = AKLOG_SUCCESS; |
| 1342 | int auth_status = AKLOG_SUCCESS; |
| 1343 | |
| 1344 | char *nextpath; |
| 1345 | char pathtocheck[MAXPATHLEN + 1]; |
| 1346 | char mountpoint[MAXPATHLEN + 1]; |
| 1347 | |
| 1348 | char *cell; |
| 1349 | char *endofcell; |
| 1350 | |
| 1351 | u_char isdirectory; |
| 1352 | |
| 1353 | /* Initialize */ |
| 1354 | if (path[0] == DIR) |
| 1355 | strlcpy(pathtocheck, path, sizeof(pathtocheck)); |
| 1356 | else { |
| 1357 | if (getcwd(pathtocheck, sizeof(pathtocheck)) == NULL) { |
| 1358 | fprintf(stderr, "Unable to find current working directory:\n"); |
| 1359 | fprintf(stderr, "%s\n", pathtocheck); |
| 1360 | fprintf(stderr, "Try an absolute pathname.\n"); |
| 1361 | exit(AKLOG_BADPATH); |
| 1362 | } |
| 1363 | else { |
| 1364 | strlcat(pathtocheck, DIRSTRING, sizeof(pathtocheck)); |
| 1365 | strlcat(pathtocheck, path, sizeof(pathtocheck)); |
| 1366 | } |
| 1367 | } |
| 1368 | next_path(pathtocheck); |
| 1369 | |
| 1370 | /* Go on to the next level down the path */ |
| 1371 | while ((nextpath = next_path(NULL))) { |
| 1372 | strlcpy(pathtocheck, nextpath, sizeof(pathtocheck)); |
| 1373 | afs_dprintf("Checking directory %s\n", pathtocheck); |
| 1374 | /* |
| 1375 | * If this is an afs mountpoint, determine what cell from |
| 1376 | * the mountpoint name which is of the form |
| 1377 | * #cellname:volumename or %cellname:volumename. |
| 1378 | */ |
| 1379 | if (get_afs_mountpoint(pathtocheck, mountpoint, sizeof(mountpoint))) { |
| 1380 | /* skip over the '#' or '%' */ |
| 1381 | cell = mountpoint + 1; |
| 1382 | /* Add this (cell:volumename) to the list of zsubs */ |
| 1383 | if (zsubs) |
| 1384 | ll_string(&zsublist, ll_s_add, cell); |
| 1385 | if (zsubs || hosts) |
| 1386 | add_hosts(pathtocheck); |
| 1387 | if ((endofcell = strchr(mountpoint, VOLMARKER))) { |
| 1388 | *endofcell = '\0'; |
| 1389 | auth_status = auth_to_cell(context, config, cell, NULL, NULL); |
| 1390 | if (auth_status) { |
| 1391 | if (status == AKLOG_SUCCESS) |
| 1392 | status = auth_status; |
| 1393 | else if (status != auth_status) |
| 1394 | status = AKLOG_SOMETHINGSWRONG; |
| 1395 | } |
| 1396 | } |
| 1397 | } |
| 1398 | else { |
| 1399 | if (isdir(pathtocheck, &isdirectory) < 0) { |
| 1400 | /* |
| 1401 | * If we've logged and still can't stat, there's |
| 1402 | * a problem... |
| 1403 | */ |
| 1404 | fprintf(stderr, "%s: stat(%s): %s\n", progname, |
| 1405 | pathtocheck, strerror(errno)); |
| 1406 | return(AKLOG_BADPATH); |
| 1407 | } |
| 1408 | else if (! isdirectory) { |
| 1409 | /* Allow only directories */ |
| 1410 | fprintf(stderr, "%s: %s: %s\n", progname, pathtocheck, |
| 1411 | strerror(ENOTDIR)); |
| 1412 | return(AKLOG_BADPATH); |
| 1413 | } |
| 1414 | } |
| 1415 | } |
| 1416 | |
| 1417 | |
| 1418 | return(status); |
| 1419 | } |
| 1420 | |
| 1421 | |
| 1422 | /* Print usage message and exit */ |
| 1423 | static void |
| 1424 | usage(void) |
| 1425 | { |
| 1426 | fprintf(stderr, "\nUsage: %s %s%s%s\n", progname, |
| 1427 | "[-d] [[-cell | -c] cell [-k krb_realm]] ", |
| 1428 | "[[-p | -path] pathname]\n", |
| 1429 | " [-zsubs] [-hosts] [-noauth] [-noprdb] [-force] [-setpag] \n" |
| 1430 | " [-linked]" |
| 1431 | #ifndef HAVE_NO_KRB5_524 |
| 1432 | " [-524]" |
| 1433 | #endif |
| 1434 | "\n"); |
| 1435 | fprintf(stderr, " -d gives debugging information.\n"); |
| 1436 | fprintf(stderr, " krb_realm is the kerberos realm of a cell.\n"); |
| 1437 | fprintf(stderr, " pathname is the name of a directory to which "); |
| 1438 | fprintf(stderr, "you wish to authenticate.\n"); |
| 1439 | fprintf(stderr, " -zsubs gives zephyr subscription information.\n"); |
| 1440 | fprintf(stderr, " -hosts gives host address information.\n"); |
| 1441 | fprintf(stderr, " -noauth does not attempt to get tokens.\n"); |
| 1442 | fprintf(stderr, " -noprdb means don't try to determine AFS ID.\n"); |
| 1443 | fprintf(stderr, " -force means replace identical tickets. \n"); |
| 1444 | fprintf(stderr, " -linked means if AFS node is linked, try both. \n"); |
| 1445 | fprintf(stderr, " -setpag set the AFS process authentication group.\n"); |
| 1446 | #ifndef HAVE_NO_KRB5_524 |
| 1447 | fprintf(stderr, " -524 means use the 524 converter instead of V5 directly\n"); |
| 1448 | #endif |
| 1449 | fprintf(stderr, " No commandline arguments means "); |
| 1450 | fprintf(stderr, "authenticate to the local cell.\n"); |
| 1451 | fprintf(stderr, "\n"); |
| 1452 | exit(AKLOG_USAGE); |
| 1453 | } |
| 1454 | |
| 1455 | int |
| 1456 | main(int argc, char *argv[]) |
| 1457 | { |
| 1458 | krb5_context context; |
| 1459 | int status = AKLOG_SUCCESS; |
| 1460 | int i; |
| 1461 | int somethingswrong = FALSE; |
| 1462 | |
| 1463 | cellinfo_t cellinfo; |
| 1464 | |
| 1465 | extern char *progname; /* Name of this program */ |
| 1466 | |
| 1467 | int cmode = FALSE; /* Cellname mode */ |
| 1468 | int pmode = FALSE; /* Path name mode */ |
| 1469 | |
| 1470 | char realm[REALM_SZ]; /* Kerberos realm of afs server */ |
| 1471 | char cell[BUFSIZ]; /* Cell to which we are authenticating */ |
| 1472 | char path[MAXPATHLEN + 1]; /* Path length for path mode */ |
| 1473 | |
| 1474 | linked_list cells; /* List of cells to log to */ |
| 1475 | linked_list paths; /* List of paths to log to */ |
| 1476 | ll_node *cur_node; |
| 1477 | char *linkedcell; |
| 1478 | const char *config = AFSDIR_CLIENT_ETC_DIRPATH; |
| 1479 | |
| 1480 | memset(&cellinfo, 0, sizeof(cellinfo)); |
| 1481 | |
| 1482 | memset(realm, 0, sizeof(realm)); |
| 1483 | memset(cell, 0, sizeof(cell)); |
| 1484 | memset(path, 0, sizeof(path)); |
| 1485 | |
| 1486 | ll_init(&cells); |
| 1487 | ll_init(&paths); |
| 1488 | |
| 1489 | ll_init(&zsublist); |
| 1490 | ll_init(&hostlist); |
| 1491 | |
| 1492 | /* Store the program name here for error messages */ |
| 1493 | if ((progname = strrchr(argv[0], DIR))) |
| 1494 | progname++; |
| 1495 | else |
| 1496 | progname = argv[0]; |
| 1497 | |
| 1498 | #if defined(KRB5_PROG_ETYPE_NOSUPP) && !(defined(HAVE_KRB5_ENCTYPE_ENABLE) || defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO)) |
| 1499 | { |
| 1500 | char *filepath = NULL, *newpath = NULL; |
| 1501 | #ifndef AFS_DARWIN_ENV |
| 1502 | char *defaultpath = "/etc/krb5.conf:/etc/krb5/krb5.conf"; |
| 1503 | #else |
| 1504 | char *defaultpath = "~/Library/Preferences/edu.mit.Kerberos:/Library/Preferences/edu.mit.Kerberos"; |
| 1505 | #endif |
| 1506 | filepath = getenv("KRB5_CONFIG"); |
| 1507 | |
| 1508 | /* only fiddle with KRB5_CONFIG if krb5-weak.conf actually exists */ |
| 1509 | if (asprintf(&newpath, "%s/krb5-weak.conf", |
| 1510 | AFSDIR_CLIENT_ETC_DIRPATH) < 0) |
| 1511 | newpath = NULL; |
| 1512 | if (newpath != NULL && access(newpath, R_OK) == 0) { |
| 1513 | free(newpath); |
| 1514 | newpath = NULL; |
| 1515 | if (asprintf(&newpath, "%s:%s/krb5-weak.conf", |
| 1516 | filepath ? filepath : defaultpath, |
| 1517 | AFSDIR_CLIENT_ETC_DIRPATH) < 0) |
| 1518 | newpath = NULL; |
| 1519 | else |
| 1520 | setenv("KRB5_CONFIG", newpath, 1); |
| 1521 | } |
| 1522 | #endif |
| 1523 | krb5_init_context(&context); |
| 1524 | |
| 1525 | #if defined(KRB5_PROG_ETYPE_NOSUPP) && !(defined(HAVE_KRB5_ENCTYPE_ENABLE) || defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO)) |
| 1526 | if (newpath) |
| 1527 | free(newpath); |
| 1528 | if (filepath) |
| 1529 | setenv("KRB5_CONFIG", filepath, 1); |
| 1530 | else |
| 1531 | unsetenv("KRB5_CONFIG"); |
| 1532 | } |
| 1533 | #endif |
| 1534 | initialize_KTC_error_table (); |
| 1535 | initialize_U_error_table(); |
| 1536 | initialize_RXK_error_table(); |
| 1537 | initialize_ACFG_error_table(); |
| 1538 | initialize_PT_error_table(); |
| 1539 | afs_set_com_err_hook(redirect_errors); |
| 1540 | |
| 1541 | /* |
| 1542 | * Enable DES enctypes, which are currently still required for AFS. |
| 1543 | * krb5_allow_weak_crypto is MIT Kerberos 1.8. krb5_enctype_enable is |
| 1544 | * Heimdal. |
| 1545 | */ |
| 1546 | #if defined(HAVE_KRB5_ENCTYPE_ENABLE) |
| 1547 | i = krb5_enctype_valid(context, ETYPE_DES_CBC_CRC); |
| 1548 | if (i) |
| 1549 | krb5_enctype_enable(context, ETYPE_DES_CBC_CRC); |
| 1550 | #elif defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO) |
| 1551 | krb5_allow_weak_crypto(context, 1); |
| 1552 | #endif |
| 1553 | |
| 1554 | /* Initialize list of cells to which we have authenticated */ |
| 1555 | ll_init(&authedcells); |
| 1556 | |
| 1557 | /* Parse commandline arguments and make list of what to do. */ |
| 1558 | for (i = 1; i < argc; i++) { |
| 1559 | if (strcmp(argv[i], "-d") == 0) |
| 1560 | dflag++; |
| 1561 | else if (strcmp(argv[i], "-noauth") == 0) |
| 1562 | noauth++; |
| 1563 | else if (strcmp(argv[i], "-zsubs") == 0) |
| 1564 | zsubs++; |
| 1565 | else if (strcmp(argv[i], "-hosts") == 0) |
| 1566 | hosts++; |
| 1567 | else if (strcmp(argv[i], "-noprdb") == 0) |
| 1568 | noprdb++; |
| 1569 | else if (strcmp(argv[i], "-linked") == 0) |
| 1570 | linked++; |
| 1571 | else if (strcmp(argv[i], "-force") == 0) |
| 1572 | force++; |
| 1573 | #ifndef HAVE_NO_KRB5_524 |
| 1574 | else if (strcmp(argv[i], "-524") == 0) |
| 1575 | do524++; |
| 1576 | #endif |
| 1577 | else if (strcmp(argv[i], "-setpag") == 0) |
| 1578 | afssetpag++; |
| 1579 | else if (((strcmp(argv[i], "-cell") == 0) || |
| 1580 | (strcmp(argv[i], "-c") == 0)) && !pmode) |
| 1581 | if (++i < argc) { |
| 1582 | cmode++; |
| 1583 | strlcpy(cell, argv[i], sizeof(cell)); |
| 1584 | } |
| 1585 | else |
| 1586 | usage(); |
| 1587 | else if ((strcmp(argv[i], "-keytab") == 0)) |
| 1588 | if (++i < argc) { |
| 1589 | keytab = argv[i]; |
| 1590 | } |
| 1591 | else |
| 1592 | usage(); |
| 1593 | else if ((strcmp(argv[i], "-principal") == 0)) |
| 1594 | if (++i < argc) { |
| 1595 | client = argv[i]; |
| 1596 | } |
| 1597 | else |
| 1598 | usage(); |
| 1599 | else if (((strcmp(argv[i], "-path") == 0) || |
| 1600 | (strcmp(argv[i], "-p") == 0)) && !cmode) |
| 1601 | if (++i < argc) { |
| 1602 | pmode++; |
| 1603 | strlcpy(path, argv[i], sizeof(path)); |
| 1604 | } |
| 1605 | else |
| 1606 | usage(); |
| 1607 | else if (strcmp(argv[i], "-config") == 0) |
| 1608 | if (++i < argc) { |
| 1609 | config = argv[i]; |
| 1610 | } |
| 1611 | else |
| 1612 | usage(); |
| 1613 | else if (argv[i][0] == '-') |
| 1614 | usage(); |
| 1615 | else if (!pmode && !cmode) { |
| 1616 | if (strchr(argv[i], DIR) || (strcmp(argv[i], ".") == 0) || |
| 1617 | (strcmp(argv[i], "..") == 0)) { |
| 1618 | pmode++; |
| 1619 | strlcpy(path, argv[i], sizeof(path)); |
| 1620 | } |
| 1621 | else { |
| 1622 | cmode++; |
| 1623 | strlcpy(cell, argv[i], sizeof(cell)); |
| 1624 | } |
| 1625 | } |
| 1626 | else |
| 1627 | usage(); |
| 1628 | |
| 1629 | if (cmode) { |
| 1630 | if (((i + 1) < argc) && (strcmp(argv[i + 1], "-k") == 0)) { |
| 1631 | i+=2; |
| 1632 | if (i < argc) |
| 1633 | strlcpy(realm, argv[i], sizeof(realm)); |
| 1634 | else |
| 1635 | usage(); |
| 1636 | } |
| 1637 | /* Add this cell to list of cells */ |
| 1638 | strcpy(cellinfo.cell, cell); |
| 1639 | strcpy(cellinfo.realm, realm); |
| 1640 | if ((cur_node = ll_add_node(&cells, ll_tail))) { |
| 1641 | char *new_cellinfo; |
| 1642 | if ((new_cellinfo = copy_cellinfo(&cellinfo))) |
| 1643 | ll_add_data(cur_node, new_cellinfo); |
| 1644 | else { |
| 1645 | fprintf(stderr, |
| 1646 | "%s: failure copying cellinfo.\n", progname); |
| 1647 | exit(AKLOG_MISC); |
| 1648 | } |
| 1649 | } |
| 1650 | else { |
| 1651 | fprintf(stderr, "%s: failure adding cell to cells list.\n", |
| 1652 | progname); |
| 1653 | exit(AKLOG_MISC); |
| 1654 | } |
| 1655 | memset(&cellinfo, 0, sizeof(cellinfo)); |
| 1656 | cmode = FALSE; |
| 1657 | memset(cell, 0, sizeof(cell)); |
| 1658 | memset(realm, 0, sizeof(realm)); |
| 1659 | } |
| 1660 | else if (pmode) { |
| 1661 | /* Add this path to list of paths */ |
| 1662 | if ((cur_node = ll_add_node(&paths, ll_tail))) { |
| 1663 | char *new_path; |
| 1664 | if ((new_path = strdup(path))) |
| 1665 | ll_add_data(cur_node, new_path); |
| 1666 | else { |
| 1667 | fprintf(stderr, "%s: failure copying path name.\n", |
| 1668 | progname); |
| 1669 | exit(AKLOG_MISC); |
| 1670 | } |
| 1671 | } |
| 1672 | else { |
| 1673 | fprintf(stderr, "%s: failure adding path to paths list.\n", |
| 1674 | progname); |
| 1675 | exit(AKLOG_MISC); |
| 1676 | } |
| 1677 | pmode = FALSE; |
| 1678 | memset(path, 0, sizeof(path)); |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | /* If nothing was given, log to the local cell. */ |
| 1683 | if ((cells.nelements + paths.nelements) == 0) { |
| 1684 | struct passwd *pwd; |
| 1685 | |
| 1686 | status = auth_to_cell(context, config, NULL, NULL, &linkedcell); |
| 1687 | |
| 1688 | /* If this cell is linked to a DCE cell, and user requested -linked, |
| 1689 | * get tokens for both. This is very useful when the AFS cell is |
| 1690 | * linked to a DFS cell and this system does not also have DFS. |
| 1691 | */ |
| 1692 | |
| 1693 | if (!status && linked && linkedcell != NULL) { |
| 1694 | afs_dprintf("Linked cell: %s\n", linkedcell); |
| 1695 | status = auth_to_cell(context, config, linkedcell, NULL, NULL); |
| 1696 | } |
| 1697 | if (linkedcell) { |
| 1698 | free(linkedcell); |
| 1699 | linkedcell = NULL; |
| 1700 | } |
| 1701 | |
| 1702 | /* |
| 1703 | * Local hack - if the person has a file in their home |
| 1704 | * directory called ".xlog", read that for a list of |
| 1705 | * extra cells to authenticate to |
| 1706 | */ |
| 1707 | |
| 1708 | if ((pwd = getpwuid(getuid())) != NULL) { |
| 1709 | struct stat sbuf; |
| 1710 | FILE *f; |
| 1711 | char fcell[100], xlog_path[512]; |
| 1712 | |
| 1713 | strlcpy(xlog_path, pwd->pw_dir, sizeof(xlog_path)); |
| 1714 | strlcat(xlog_path, "/.xlog", sizeof(xlog_path)); |
| 1715 | |
| 1716 | if ((stat(xlog_path, &sbuf) == 0) && |
| 1717 | ((f = fopen(xlog_path, "r")) != NULL)) { |
| 1718 | |
| 1719 | afs_dprintf("Reading %s for cells to authenticate to.\n", |
| 1720 | xlog_path); |
| 1721 | |
| 1722 | while (fgets(fcell, 100, f) != NULL) { |
| 1723 | int auth_status; |
| 1724 | |
| 1725 | fcell[strlen(fcell) - 1] = '\0'; |
| 1726 | |
| 1727 | afs_dprintf("Found cell %s in %s.\n", fcell, xlog_path); |
| 1728 | |
| 1729 | auth_status = auth_to_cell(context, config, fcell, NULL, NULL); |
| 1730 | if (status == AKLOG_SUCCESS) |
| 1731 | status = auth_status; |
| 1732 | else |
| 1733 | status = AKLOG_SOMETHINGSWRONG; |
| 1734 | } |
| 1735 | } |
| 1736 | } |
| 1737 | } |
| 1738 | else { |
| 1739 | /* Log to all cells in the cells list first */ |
| 1740 | for (cur_node = cells.first; cur_node; cur_node = cur_node->next) { |
| 1741 | memcpy((char *)&cellinfo, cur_node->data, sizeof(cellinfo)); |
| 1742 | status = auth_to_cell(context, config, cellinfo.cell, |
| 1743 | cellinfo.realm, &linkedcell); |
| 1744 | if (status) { |
| 1745 | somethingswrong++; |
| 1746 | } else { |
| 1747 | if (linked && linkedcell != NULL) { |
| 1748 | afs_dprintf("Linked cell: %s\n", linkedcell); |
| 1749 | status = auth_to_cell(context, config, linkedcell, |
| 1750 | cellinfo.realm, NULL); |
| 1751 | if (status) |
| 1752 | somethingswrong++; |
| 1753 | } |
| 1754 | if (linkedcell != NULL) { |
| 1755 | free(linkedcell); |
| 1756 | linkedcell = NULL; |
| 1757 | } |
| 1758 | } |
| 1759 | } |
| 1760 | |
| 1761 | /* Then, log to all paths in the paths list */ |
| 1762 | for (cur_node = paths.first; cur_node; cur_node = cur_node->next) { |
| 1763 | status = auth_to_path(context, config, cur_node->data); |
| 1764 | if (status) |
| 1765 | somethingswrong++; |
| 1766 | } |
| 1767 | |
| 1768 | /* |
| 1769 | * If only one thing was logged to, we'll return the status |
| 1770 | * of the single call. Otherwise, we'll return a generic |
| 1771 | * something failed status. |
| 1772 | */ |
| 1773 | if (somethingswrong && ((cells.nelements + paths.nelements) > 1)) |
| 1774 | status = AKLOG_SOMETHINGSWRONG; |
| 1775 | } |
| 1776 | |
| 1777 | /* If we are keeping track of zephyr subscriptions, print them. */ |
| 1778 | if (zsubs) |
| 1779 | for (cur_node = zsublist.first; cur_node; cur_node = cur_node->next) { |
| 1780 | printf("zsub: %s\n", cur_node->data); |
| 1781 | } |
| 1782 | |
| 1783 | /* If we are keeping track of host information, print it. */ |
| 1784 | if (hosts) |
| 1785 | for (cur_node = hostlist.first; cur_node; cur_node = cur_node->next) { |
| 1786 | printf("host: %s\n", cur_node->data); |
| 1787 | } |
| 1788 | |
| 1789 | exit(status); |
| 1790 | } |
| 1791 | |
| 1792 | static int |
| 1793 | isdir(char *path, unsigned char *val) |
| 1794 | { |
| 1795 | struct stat statbuf; |
| 1796 | |
| 1797 | if (lstat(path, &statbuf) < 0) |
| 1798 | return (-1); |
| 1799 | else { |
| 1800 | if ((statbuf.st_mode & S_IFMT) == S_IFDIR) |
| 1801 | *val = TRUE; |
| 1802 | else |
| 1803 | *val = FALSE; |
| 1804 | return (0); |
| 1805 | } |
| 1806 | } |
| 1807 | |
| 1808 | static krb5_error_code |
| 1809 | get_credv5_akimpersonate(krb5_context context, |
| 1810 | char* keytab, |
| 1811 | krb5_principal service_principal, |
| 1812 | krb5_principal client_principal, |
| 1813 | time_t starttime, |
| 1814 | time_t endtime, |
| 1815 | int *allowed_enctypes, |
| 1816 | int *paddress, |
| 1817 | krb5_creds** out_creds /* out */ ) |
| 1818 | { |
| 1819 | #if defined(USING_HEIMDAL) || (defined(HAVE_ENCODE_KRB5_ENC_TKT) && defined(HAVE_ENCODE_KRB5_TICKET) && defined(HAVE_KRB5_C_ENCRYPT)) |
| 1820 | krb5_error_code code; |
| 1821 | krb5_keytab kt = 0; |
| 1822 | krb5_kt_cursor cursor[1]; |
| 1823 | krb5_keytab_entry entry[1]; |
| 1824 | krb5_ccache cc = 0; |
| 1825 | krb5_creds *creds = 0; |
| 1826 | krb5_enctype enctype; |
| 1827 | krb5_kvno kvno; |
| 1828 | krb5_keyblock session_key[1]; |
| 1829 | #if USING_HEIMDAL |
| 1830 | Ticket ticket_reply[1]; |
| 1831 | EncTicketPart enc_tkt_reply[1]; |
| 1832 | krb5_address address[30]; |
| 1833 | krb5_addresses faddr[1]; |
| 1834 | unsigned int temp_vno[1]; |
| 1835 | time_t temp_time[2]; |
| 1836 | #else |
| 1837 | krb5_ticket ticket_reply[1]; |
| 1838 | krb5_enc_tkt_part enc_tkt_reply[1]; |
| 1839 | krb5_address address[30], *faddr[30]; |
| 1840 | krb5_data * temp; |
| 1841 | #endif |
| 1842 | int i; |
| 1843 | static int any_enctype[] = {0}; |
| 1844 | *out_creds = 0; |
| 1845 | if (!(creds = malloc(sizeof *creds))) { |
| 1846 | code = ENOMEM; |
| 1847 | goto cleanup; |
| 1848 | } |
| 1849 | if (!allowed_enctypes) |
| 1850 | allowed_enctypes = any_enctype; |
| 1851 | |
| 1852 | cc = 0; |
| 1853 | enctype = 0; /* AKIMPERSONATE_IGNORE_ENCTYPE */ |
| 1854 | kvno = 0; /* AKIMPERSONATE_IGNORE_VNO */ |
| 1855 | memset((char*)creds, 0, sizeof *creds); |
| 1856 | memset((char*)entry, 0, sizeof *entry); |
| 1857 | memset((char*)session_key, 0, sizeof *session_key); |
| 1858 | memset((char*)ticket_reply, 0, sizeof *ticket_reply); |
| 1859 | memset((char*)enc_tkt_reply, 0, sizeof *enc_tkt_reply); |
| 1860 | code = krb5_kt_resolve(context, keytab, &kt); |
| 1861 | if (code) { |
| 1862 | if (keytab) |
| 1863 | afs_com_err(progname, code, "while resolving keytab %s", keytab); |
| 1864 | else |
| 1865 | afs_com_err(progname, code, "while resolving default keytab"); |
| 1866 | goto cleanup; |
| 1867 | } |
| 1868 | |
| 1869 | if (service_principal) { |
| 1870 | for (i = 0; (enctype = allowed_enctypes[i]) || !i; ++i) { |
| 1871 | code = krb5_kt_get_entry(context, |
| 1872 | kt, |
| 1873 | service_principal, |
| 1874 | kvno, |
| 1875 | enctype, |
| 1876 | entry); |
| 1877 | if (!code) { |
| 1878 | if (allowed_enctypes[i]) |
| 1879 | deref_keyblock_enctype(session_key) = allowed_enctypes[i]; |
| 1880 | break; |
| 1881 | } |
| 1882 | } |
| 1883 | if (code) { |
| 1884 | afs_com_err(progname, code,"while scanning keytab entries"); |
| 1885 | goto cleanup; |
| 1886 | } |
| 1887 | } else { |
| 1888 | krb5_keytab_entry new[1]; |
| 1889 | int best = -1; |
| 1890 | memset(new, 0, sizeof *new); |
| 1891 | if ((code = krb5_kt_start_seq_get(context, kt, cursor))) { |
| 1892 | afs_com_err(progname, code, "while starting keytab scan"); |
| 1893 | goto cleanup; |
| 1894 | } |
| 1895 | while (!(code = krb5_kt_next_entry(context, kt, new, cursor))) { |
| 1896 | for (i = 0; |
| 1897 | allowed_enctypes[i] && allowed_enctypes[i] |
| 1898 | != deref_entry_enctype(new); ++i) |
| 1899 | ; |
| 1900 | if ((!i || allowed_enctypes[i]) && |
| 1901 | (best < 0 || best > i)) { |
| 1902 | krb5_free_keytab_entry_contents(context, entry); |
| 1903 | *entry = *new; |
| 1904 | memset(new, 0, sizeof *new); |
| 1905 | } else krb5_free_keytab_entry_contents(context, new); |
| 1906 | } |
| 1907 | if ((i = krb5_kt_end_seq_get(context, kt, cursor))) { |
| 1908 | afs_com_err(progname, i, "while ending keytab scan"); |
| 1909 | code = i; |
| 1910 | goto cleanup; |
| 1911 | } |
| 1912 | if (best < 0) { |
| 1913 | afs_com_err(progname, code, "while scanning keytab"); |
| 1914 | goto cleanup; |
| 1915 | } |
| 1916 | deref_keyblock_enctype(session_key) = deref_entry_enctype(entry); |
| 1917 | } |
| 1918 | |
| 1919 | /* Make Ticket */ |
| 1920 | |
| 1921 | #if USING_HEIMDAL |
| 1922 | if ((code = krb5_generate_random_keyblock(context, |
| 1923 | deref_keyblock_enctype(session_key), session_key))) { |
| 1924 | afs_com_err(progname, code, "while making session key"); |
| 1925 | goto cleanup; |
| 1926 | } |
| 1927 | enc_tkt_reply->flags.initial = 1; |
| 1928 | enc_tkt_reply->transited.tr_type = DOMAIN_X500_COMPRESS; |
| 1929 | enc_tkt_reply->cname = client_principal->name; |
| 1930 | enc_tkt_reply->crealm = client_principal->realm; |
| 1931 | enc_tkt_reply->key = *session_key; |
| 1932 | { |
| 1933 | static krb5_data empty_string; |
| 1934 | enc_tkt_reply->transited.contents = empty_string; |
| 1935 | } |
| 1936 | enc_tkt_reply->authtime = starttime; |
| 1937 | enc_tkt_reply->starttime = temp_time; |
| 1938 | *enc_tkt_reply->starttime = starttime; |
| 1939 | #if 0 |
| 1940 | enc_tkt_reply->renew_till = temp_time + 1; |
| 1941 | *enc_tkt_reply->renew_till = endtime; |
| 1942 | #endif |
| 1943 | enc_tkt_reply->endtime = endtime; |
| 1944 | #else |
| 1945 | if ((code = krb5_c_make_random_key(context, |
| 1946 | deref_keyblock_enctype(session_key), session_key))) { |
| 1947 | afs_com_err(progname, code, "while making session key"); |
| 1948 | goto cleanup; |
| 1949 | } |
| 1950 | enc_tkt_reply->magic = KV5M_ENC_TKT_PART; |
| 1951 | #define DATACAST (unsigned char *) |
| 1952 | enc_tkt_reply->flags |= TKT_FLG_INITIAL; |
| 1953 | enc_tkt_reply->transited.tr_type = KRB5_DOMAIN_X500_COMPRESS; |
| 1954 | enc_tkt_reply->session = session_key; |
| 1955 | enc_tkt_reply->client = client_principal; |
| 1956 | { |
| 1957 | static krb5_data empty_string; |
| 1958 | enc_tkt_reply->transited.tr_contents = empty_string; |
| 1959 | } |
| 1960 | enc_tkt_reply->times.authtime = starttime; |
| 1961 | enc_tkt_reply->times.starttime = starttime; /* krb524init needs this */ |
| 1962 | enc_tkt_reply->times.endtime = endtime; |
| 1963 | #endif /* USING_HEIMDAL */ |
| 1964 | /* NB: We will discard address for now--ignoring caddr field |
| 1965 | in any case. MIT branch does what it always did. */ |
| 1966 | |
| 1967 | if (paddress && *paddress) { |
| 1968 | deref_enc_tkt_addrs(enc_tkt_reply) = faddr; |
| 1969 | #if USING_HEIMDAL |
| 1970 | faddr->len = 0; |
| 1971 | faddr->val = address; |
| 1972 | #endif |
| 1973 | for (i = 0; paddress[i]; ++i) { |
| 1974 | #if USING_HEIMDAL |
| 1975 | address[i].addr_type = KRB5_ADDRESS_INET; |
| 1976 | address[i].address.data = (void*)(paddress+i); |
| 1977 | address[i].address.length = sizeof(paddress[i]); |
| 1978 | #else |
| 1979 | #if !USING_SSL |
| 1980 | address[i].magic = KV5M_ADDRESS; |
| 1981 | address[i].addrtype = ADDRTYPE_INET; |
| 1982 | #else |
| 1983 | address[i].addrtype = AF_INET; |
| 1984 | #endif |
| 1985 | address[i].contents = (void*)(paddress+i); |
| 1986 | address[i].length = sizeof(int); |
| 1987 | faddr[i] = address+i; |
| 1988 | #endif |
| 1989 | } |
| 1990 | #if USING_HEIMDAL |
| 1991 | faddr->len = i; |
| 1992 | #else |
| 1993 | faddr[i] = 0; |
| 1994 | #endif |
| 1995 | } |
| 1996 | |
| 1997 | #if USING_HEIMDAL |
| 1998 | ticket_reply->sname = service_principal->name; |
| 1999 | ticket_reply->realm = service_principal->realm; |
| 2000 | |
| 2001 | { /* crypto block */ |
| 2002 | krb5_crypto crypto = 0; |
| 2003 | unsigned char *buf = 0; |
| 2004 | size_t buf_size, buf_len; |
| 2005 | char *what; |
| 2006 | |
| 2007 | ASN1_MALLOC_ENCODE(EncTicketPart, buf, buf_size, |
| 2008 | enc_tkt_reply, &buf_len, code); |
| 2009 | if(code) { |
| 2010 | afs_com_err(progname, code, "while encoding ticket"); |
| 2011 | goto cleanup; |
| 2012 | } |
| 2013 | |
| 2014 | if(buf_len != buf_size) { |
| 2015 | afs_com_err(progname, code, |
| 2016 | "%u != %u while encoding ticket (internal ASN.1 encoder error", |
| 2017 | (unsigned int)buf_len, (unsigned int)buf_size); |
| 2018 | goto cleanup; |
| 2019 | } |
| 2020 | what = "krb5_crypto_init"; |
| 2021 | code = krb5_crypto_init(context, |
| 2022 | &deref_entry_keyblock(entry), |
| 2023 | deref_entry_enctype(entry), |
| 2024 | &crypto); |
| 2025 | if(!code) { |
| 2026 | what = "krb5_encrypt"; |
| 2027 | code = krb5_encrypt_EncryptedData(context, crypto, KRB5_KU_TICKET, |
| 2028 | buf, buf_len, entry->vno, &(ticket_reply->enc_part)); |
| 2029 | } |
| 2030 | if (buf) free(buf); |
| 2031 | if (crypto) krb5_crypto_destroy(context, crypto); |
| 2032 | if(code) { |
| 2033 | afs_com_err(progname, code, "while %s", what); |
| 2034 | goto cleanup; |
| 2035 | } |
| 2036 | } /* crypto block */ |
| 2037 | ticket_reply->enc_part.etype = deref_entry_enctype(entry); |
| 2038 | ticket_reply->enc_part.kvno = (void *)temp_vno; |
| 2039 | *ticket_reply->enc_part.kvno = entry->vno; |
| 2040 | ticket_reply->tkt_vno = 5; |
| 2041 | #else |
| 2042 | ticket_reply->server = service_principal; |
| 2043 | ticket_reply->enc_part2 = enc_tkt_reply; |
| 2044 | if ((code = krb5_encrypt_tkt_part(context, &deref_entry_keyblock(entry), ticket_reply))) { |
| 2045 | afs_com_err(progname, code, "while making ticket"); |
| 2046 | goto cleanup; |
| 2047 | } |
| 2048 | ticket_reply->enc_part.kvno = entry->vno; |
| 2049 | #endif |
| 2050 | |
| 2051 | /* Construct Creds */ |
| 2052 | |
| 2053 | if ((code = krb5_copy_principal(context, service_principal, |
| 2054 | &creds->server))) { |
| 2055 | afs_com_err(progname, code, "while copying service principal"); |
| 2056 | goto cleanup; |
| 2057 | } |
| 2058 | if ((code = krb5_copy_principal(context, client_principal, |
| 2059 | &creds->client))) { |
| 2060 | afs_com_err(progname, code, "while copying client principal"); |
| 2061 | goto cleanup; |
| 2062 | } |
| 2063 | if ((code = krb5_copy_keyblock_contents(context, session_key, |
| 2064 | &deref_session_key(creds)))) { |
| 2065 | afs_com_err(progname, code, "while copying session key"); |
| 2066 | goto cleanup; |
| 2067 | } |
| 2068 | |
| 2069 | #if USING_HEIMDAL |
| 2070 | creds->times.authtime = enc_tkt_reply->authtime; |
| 2071 | creds->times.starttime = *(enc_tkt_reply->starttime); |
| 2072 | creds->times.endtime = enc_tkt_reply->endtime; |
| 2073 | creds->times.renew_till = 0; /* *(enc_tkt_reply->renew_till) */ |
| 2074 | creds->flags.b = enc_tkt_reply->flags; |
| 2075 | #else |
| 2076 | creds->times = enc_tkt_reply->times; |
| 2077 | creds->ticket_flags = enc_tkt_reply->flags; |
| 2078 | #endif |
| 2079 | if (!deref_enc_tkt_addrs(enc_tkt_reply)) |
| 2080 | ; |
| 2081 | else if ((code = krb5_copy_addresses(context, |
| 2082 | deref_enc_tkt_addrs(enc_tkt_reply), &creds->addresses))) { |
| 2083 | afs_com_err(progname, code, "while copying addresses"); |
| 2084 | goto cleanup; |
| 2085 | } |
| 2086 | |
| 2087 | #if USING_HEIMDAL |
| 2088 | { |
| 2089 | size_t creds_tkt_len; |
| 2090 | ASN1_MALLOC_ENCODE(Ticket, creds->ticket.data, creds->ticket.length, |
| 2091 | ticket_reply, &creds_tkt_len, code); |
| 2092 | if(code) { |
| 2093 | afs_com_err(progname, code, "while encoding ticket"); |
| 2094 | goto cleanup; |
| 2095 | } |
| 2096 | } |
| 2097 | #else |
| 2098 | if ((code = encode_krb5_ticket(ticket_reply, &temp))) { |
| 2099 | afs_com_err(progname, code, "while encoding ticket"); |
| 2100 | goto cleanup; |
| 2101 | } |
| 2102 | creds->ticket = *temp; |
| 2103 | free(temp); |
| 2104 | #endif |
| 2105 | /* return creds */ |
| 2106 | *out_creds = creds; |
| 2107 | creds = 0; |
| 2108 | cleanup: |
| 2109 | if (deref_enc_data(&ticket_reply->enc_part)) |
| 2110 | free(deref_enc_data(&ticket_reply->enc_part)); |
| 2111 | krb5_free_keytab_entry_contents(context, entry); |
| 2112 | if (client_principal) |
| 2113 | krb5_free_principal(context, client_principal); |
| 2114 | if (service_principal) |
| 2115 | krb5_free_principal(context, service_principal); |
| 2116 | if (cc) |
| 2117 | krb5_cc_close(context, cc); |
| 2118 | if (kt) |
| 2119 | krb5_kt_close(context, kt); |
| 2120 | if (creds) krb5_free_creds(context, creds); |
| 2121 | krb5_free_keyblock_contents(context, session_key); |
| 2122 | return code; |
| 2123 | #else |
| 2124 | return -1; |
| 2125 | #endif |
| 2126 | } |
| 2127 | |
| 2128 | |
| 2129 | static krb5_error_code |
| 2130 | get_credv5(krb5_context context, char *name, char *inst, char *realm, |
| 2131 | krb5_creds **creds) |
| 2132 | { |
| 2133 | krb5_creds increds; |
| 2134 | krb5_error_code r; |
| 2135 | static krb5_principal client_principal = 0; |
| 2136 | |
| 2137 | afs_dprintf("Getting tickets: %s%s%s@%s\n", name, |
| 2138 | (inst && inst[0]) ? "/" : "", inst ? inst : "", realm); |
| 2139 | |
| 2140 | memset(&increds, 0, sizeof(increds)); |
| 2141 | /* ANL - instance may be ptr to a null string. Pass null then */ |
| 2142 | if ((r = krb5_build_principal(context, &increds.server, |
| 2143 | strlen(realm), realm, |
| 2144 | name, |
| 2145 | (inst && strlen(inst)) ? inst : NULL, |
| 2146 | NULL))) { |
| 2147 | return r; |
| 2148 | } |
| 2149 | |
| 2150 | |
| 2151 | if (!_krb425_ccache) { |
| 2152 | r = krb5_cc_default(context, &_krb425_ccache); |
| 2153 | if (r) |
| 2154 | return r; |
| 2155 | } |
| 2156 | if (!client_principal) { |
| 2157 | if (client) { |
| 2158 | r = krb5_parse_name(context, client, &client_principal); |
| 2159 | } else { |
| 2160 | r = krb5_cc_get_principal(context, _krb425_ccache, &client_principal); |
| 2161 | } |
| 2162 | if (r) |
| 2163 | return r; |
| 2164 | } |
| 2165 | |
| 2166 | increds.client = client_principal; |
| 2167 | increds.times.endtime = 0; |
| 2168 | if (do524) |
| 2169 | /* Ask for DES since that is what V4 understands */ |
| 2170 | get_creds_enctype((&increds)) = ENCTYPE_DES_CBC_CRC; |
| 2171 | |
| 2172 | if (keytab) { |
| 2173 | int allowed_enctypes[] = { |
| 2174 | ENCTYPE_DES_CBC_CRC, 0 |
| 2175 | }; |
| 2176 | |
| 2177 | r = get_credv5_akimpersonate(context, |
| 2178 | keytab, |
| 2179 | increds.server, |
| 2180 | increds.client, |
| 2181 | 300, ((~0U)>>1), |
| 2182 | allowed_enctypes, |
| 2183 | 0 /* paddress */, |
| 2184 | creds /* out */); |
| 2185 | } else { |
| 2186 | r = krb5_get_credentials(context, 0, _krb425_ccache, &increds, creds); |
| 2187 | } |
| 2188 | return r; |
| 2189 | } |
| 2190 | |
| 2191 | |
| 2192 | static int |
| 2193 | get_user_realm(krb5_context context, char **realm) |
| 2194 | { |
| 2195 | static krb5_principal client_principal = 0; |
| 2196 | krb5_error_code r = 0; |
| 2197 | |
| 2198 | *realm = NULL; |
| 2199 | |
| 2200 | if (!_krb425_ccache) { |
| 2201 | r = krb5_cc_default(context, &_krb425_ccache); |
| 2202 | if (r) |
| 2203 | return r; |
| 2204 | } |
| 2205 | if (!client_principal) { |
| 2206 | if (client) { |
| 2207 | r = krb5_parse_name(context, client, &client_principal); |
| 2208 | } else { |
| 2209 | r = krb5_cc_get_principal(context, _krb425_ccache, &client_principal); |
| 2210 | } |
| 2211 | if (r) |
| 2212 | return r; |
| 2213 | } |
| 2214 | |
| 2215 | *realm = extract_realm(context, client_principal); |
| 2216 | if (*realm == NULL) |
| 2217 | return ENOMEM; |
| 2218 | |
| 2219 | return(r); |
| 2220 | } |