4 * Copyright 1990,1991 by the Massachusetts Institute of Technology
5 * For distribution and copying rights, see the file "mit-copyright.h"
8 * Copyright (c) 2005, 2006
9 * The Linux Box Corporation
12 * Permission is granted to use, copy, create derivative works
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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
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20 * portion of this software, then the disclaimer below must
23 * This software is provided as is, without representation
24 * from the Linux Box Corporation as to its fitness for any
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29 * regents of the Linux Box Corporation shall not be liable
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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
37 #include <afsconfig.h>
38 #include <afs/param.h>
46 #include <afs/token.h>
48 #define KERBEROS_APPLE_DEPRECATED(x)
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>
57 # error No com_err.h? We need some kind of com_err.h
60 #ifndef HAVE_KERBEROSV_HEIM_ERR_H
61 #include <afs/com_err.h>
65 #include <sys/ioccom.h>
69 #include <afs/cellconfig.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>
79 #include "linked_list.h"
81 #ifdef HAVE_KRB5_CREDS_KEYBLOCK
84 #ifdef HAVE_KRB5_CREDS_SESSION
85 #define USING_HEIMDAL 1
91 #ifndef AFS_TRY_FULL_PRINC
92 #define AFS_TRY_FULL_PRINC 1
93 #endif /* AFS_TRY_FULL_PRINC */
95 #define AKLOG_TRYAGAIN -1
96 #define AKLOG_SUCCESS 0
98 #define AKLOG_SOMETHINGSWRONG 2
100 #define AKLOG_KERBEROS 4
101 #define AKLOG_TOKEN 5
102 #define AKLOG_BADPATH 6
114 /* RedHat 4.x doesn't seem to define this */
115 #define MAXSYMLINKS 5
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 */
125 char realm[REALM_SZ];
128 static krb5_ccache _krb425_ccache = NULL;
131 * Why doesn't AFS provide these prototypes?
134 extern int pioctl(char *, afs_int32, struct ViceIoctl *, afs_int32);
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 **);
146 #define TRYAGAIN(x) (x == AKLOG_TRYAGAIN || \
147 x == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN || \
148 x == KRB5KRB_ERR_GENERIC)
150 #if defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
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
158 #elif defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING)
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))
167 #error "Must have either krb5_princ_size or krb5_principal_get_comp_string"
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,
175 krb5_encrypt_tkt_part(krb5_context context,
176 const krb5_keyblock *key,
183 if ((code = encode_krb5_enc_tkt_part(ticket->enc_part2, &data)))
185 if ((code = krb5_c_encrypt_length(context, key->enctype,
186 data->length, &enclen)))
188 ticket->enc_part.ciphertext.length = enclen;
189 if (!(ticket->enc_part.ciphertext.data = malloc(enclen))) {
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;
208 #if defined(HAVE_KRB5_CREDS_KEYBLOCK)
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
214 #elif defined(HAVE_KRB5_CREDS_SESSION)
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
221 #error "Must have either keyblock or session member of krb5_creds"
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
232 #define deref_keyblock_enctype(kb) \
235 #define deref_entry_keyblock(entry) \
238 #define deref_session_key(creds) \
241 #define deref_enc_tkt_addrs(tkt) \
244 #define deref_enc_length(enc) \
245 ((enc)->cipher.length)
247 #define deref_enc_data(enc) \
250 #define krb5_free_keytab_entry_contents krb5_kt_free_entry
253 #define deref_keyblock_enctype(kb) \
256 #define deref_entry_keyblock(entry) \
259 #define deref_session_key(creds) \
262 #define deref_enc_tkt_addrs(tkt) \
265 #define deref_enc_length(enc) \
266 ((enc)->ciphertext.length)
268 #define deref_enc_data(enc) \
269 ((enc)->ciphertext.data)
273 #define deref_entry_enctype(entry) \
274 deref_keyblock_enctype(&deref_entry_keyblock(entry))
277 * Provide a replacement for strerror if we don't have it
280 #ifndef HAVE_STRERROR
281 extern char *sys_errlist[];
282 #define strerror(x) sys_errlist[x]
283 #endif /* HAVE_STRERROR */
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 */
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
307 redirect_errors(const char *who, afs_int32 code, const char *fmt, va_list ap)
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 if (krb5_init_context(&context) == 0) {
321 str = krb5_get_error_message(context, code);
322 krb5_free_context(context);
325 ; /* IRIX apparently has neither: use the string we have */
330 #ifdef HAVE_KRB5_SVC_GET_MSG
331 krb5_free_string(str);
335 vfprintf(stderr, fmt, ap);
342 afs_dprintf(char *fmt, ...) {
352 copy_cellinfo(cellinfo_t *cellinfo)
354 cellinfo_t *new_cellinfo;
356 if ((new_cellinfo = malloc(sizeof(cellinfo_t))))
357 memcpy(new_cellinfo, cellinfo, sizeof(cellinfo_t));
359 return ((char *)new_cellinfo);
364 get_cellconfig(const char *config, char *cell,
365 struct afsconf_cell *cellconfig, char **local_cell)
367 int status = AKLOG_SUCCESS;
368 struct afsconf_dir *configdir;
370 memset(cellconfig, 0, sizeof(*cellconfig));
372 *local_cell = malloc(MAXCELLCHARS);
373 if (*local_cell == NULL) {
374 fprintf(stderr, "%s: can't allocate memory for local cell name\n",
379 if (!(configdir = afsconf_Open(config))) {
381 "%s: can't get afs configuration (afsconf_Open(%s))\n",
386 if (afsconf_GetLocalCell(configdir, *local_cell, MAXCELLCHARS)) {
387 fprintf(stderr, "%s: can't determine local cell.\n", progname);
391 if ((cell == NULL) || (cell[0] == 0))
394 /* XXX - This function modifies 'cell' by passing it through lcstring */
395 if (afsconf_GetCellInfo(configdir, cell, NULL, cellconfig)) {
396 fprintf(stderr, "%s: Can't get information about cell %s.\n",
401 afsconf_Close(configdir);
407 extract_realm(krb5_context context, krb5_principal princ) {
411 len = realm_len(context, princ);
412 if (len > REALM_SZ-1)
415 realm = malloc(sizeof(char) * (len+1));
419 strncpy(realm, realm_data(context, princ), len);
426 get_realm_from_cred(krb5_context context, krb5_creds *v5cred, char **realm) {
427 #if !defined(HEIMDAL) && defined(HAVE_KRB5_DECODE_TICKET)
428 krb5_error_code code;
433 code = krb5_decode_ticket(&v5cred->ticket, &ticket);
437 *realm = extract_realm(context, ticket->server);
441 krb5_free_ticket(context, ticket);
451 * Get a Kerberos service ticket to use as the base of an rxkad token for
455 * An initialized Kerberos v5 context
457 * The realm to look in for the service principal. If NULL, then the
458 * realm is determined from the cell name or the user's credentials
459 * (see below for the heuristics used)
461 * The cell information for the cell to obtain a ticket for
463 * A Kerberos credentials structure containing the ticket acquired
464 * for the cell. This is a dynamically allocated structure, which
465 * should be freed by using the appropriate Kerberos API function.
466 * @param[out] realmUsed
467 * The realm in which the cell's service principal was located. If
468 * unset, then the principal was located in the same realm as the
469 * current user. This is a malloc'd string which should be freed
473 * 0 on success, an error value upon failure
476 * This code tries principals in the following, much debated,
479 * If the realm is specified on the command line we do
480 * - afs/cell@COMMAND-LINE-REALM
481 * - afs@COMMAND-LINE-REALM
484 * - afs/cell@REALM-FROM-USERS-PRINCIPAL
485 * - afs/cell@krb5_get_host_realm(db-server)
486 * Then, if krb5_get_host_realm(db-server) is non-empty
487 * - afs@ krb5_get_host_realm(db-server)
489 * - afs/cell@ upper-case-domain-of-db-server
490 * - afs@ upper-case-domain-of-db-server
492 * In all cases, the 'afs@' variant is only tried where the
493 * cell and the realm match case-insensitively.
497 rxkad_get_ticket(krb5_context context, char *realm,
498 struct afsconf_cell *cell,
499 krb5_creds **v5cred, char **realmUsed) {
500 char *realm_of_cell = NULL;
501 char *realm_of_user = NULL;
502 char *realm_from_princ = NULL;
508 if ((status = get_user_realm(context, &realm_of_user))) {
509 fprintf(stderr, "%s: Couldn't determine realm of user:", progname);
510 afs_com_err(progname, status, " while getting realm");
511 status = AKLOG_KERBEROS;
518 /* Cell on command line - use that one */
519 if (realm && realm[0]) {
520 realm_of_cell = realm;
521 status = AKLOG_TRYAGAIN;
522 afs_dprintf("We were told to authenticate to realm %s.\n", realm);
524 /* Initially, try using afs/cell@USERREALM */
525 afs_dprintf("Trying to authenticate to user's realm %s.\n",
527 realm_of_cell = realm_of_user;
528 status = get_credv5(context, AFSKEY, cell->name, realm_of_cell,
531 /* If that failed, try to determine the realm from the name of
532 * one of the DB servers */
533 if (TRYAGAIN(status)) {
534 realm_of_cell = afs_realm_of_cell(context, cell, FALSE);
535 if (!realm_of_cell) {
536 fprintf(stderr, "%s: Couldn't figure out realm for cell "
537 "%s.\n", progname, cell->name);
541 if (realm_of_cell[0])
542 afs_dprintf("We've deduced that we need to authenticate"
543 " to realm %s.\n", realm_of_cell);
545 afs_dprintf("We've deduced that we need to authenticate "
546 "using referrals.\n");
550 if (TRYAGAIN(status)) {
551 /* If we've got the full-princ-first option, or we're in a
552 * different realm from the cell - use the cell name as the
554 if (AFS_TRY_FULL_PRINC ||
555 strcasecmp(cell->name, realm_of_cell)!=0) {
556 status = get_credv5(context, AFSKEY, cell->name,
557 realm_of_cell, v5cred);
559 /* If we failed & we've got an empty realm, then try
560 * calling afs_realm_for_cell again. */
561 if (TRYAGAIN(status) && !realm_of_cell[0]) {
562 /* This time, get the realm by taking the domain
563 * component of the db server and make it upper case */
564 realm_of_cell = afs_realm_of_cell(context, cell, TRUE);
565 if (!realm_of_cell) {
567 "%s: Couldn't figure out realm for cell %s.\n",
568 progname, cell->name);
571 afs_dprintf("We've deduced that we need to authenticate"
572 " to realm %s.\n", realm_of_cell);
573 status = get_credv5(context, AFSKEY, cell->name,
574 realm_of_cell, v5cred);
578 /* If the realm and cell name match, then try without an
579 * instance, but only if realm is non-empty */
581 if (TRYAGAIN(status) &&
582 strcasecmp(cell->name, realm_of_cell) == 0) {
583 status = get_credv5(context, AFSKEY, NULL, realm_of_cell,
585 if (!AFS_TRY_FULL_PRINC && TRYAGAIN(status)) {
586 status = get_credv5(context, AFSKEY, cell->name,
587 realm_of_cell, v5cred);
592 /* Try to find a service principal for this cell.
593 * Some broken MIT libraries return KRB5KRB_AP_ERR_MSG_TYPE upon
594 * the first attempt, so we try twice to be sure */
596 if (status == KRB5KRB_AP_ERR_MSG_TYPE && retry == 1)
603 afs_dprintf("Kerberos error code returned by get_cred : %d\n", status);
604 fprintf(stderr, "%s: Couldn't get %s AFS tickets:\n",
605 progname, cell->name);
606 afs_com_err(progname, status, "while getting AFS tickets");
607 #ifdef KRB5_CC_NOT_KTYPE
608 if (status == KRB5_CC_NOT_KTYPE) {
609 fprintf(stderr, "allow_weak_crypto may be required in the Kerberos configuration\n");
612 status = AKLOG_KERBEROS;
616 /* If we've got a valid ticket, and we still don't know the realm name
617 * try to figure it out from the contents of the ticket
619 if (strcmp(realm_of_cell, "") == 0) {
620 status = get_realm_from_cred(context, *v5cred, &realm_from_princ);
623 "%s: Couldn't decode ticket to determine realm for "
625 progname, cell->name);
627 if (realm_from_princ)
628 realm_of_cell = realm_from_princ;
632 /* If the realm of the user and cell differ, then we need to use the
633 * realm when we later construct the user's principal */
634 if (realm_of_cell != NULL && strcmp(realm_of_user, realm_of_cell) != 0)
635 *realmUsed = realm_of_user;
638 if (realm_from_princ)
639 free(realm_from_princ);
640 if (realm_of_user && *realmUsed == NULL)
647 * Build an rxkad token from a Kerberos ticket, using only local tools (that
648 * is, without using a 524 conversion service)
651 * An initialised Kerberos 5 context
653 * A Kerberos credentials structure containing a suitable service ticket
654 * @param[out] tokenPtr
655 * An AFS token structure containing an rxkad token. This is a malloc'd
656 * structure which should be freed by the caller.
657 * @param[out[ userPtr
658 * A string containing the principal of the user to whom the token was
659 * issued. This is a malloc'd block which should be freed by the caller,
663 * 0 on success, an error value upon failure
666 rxkad_build_native_token(krb5_context context, krb5_creds *v5cred,
667 struct ktc_tokenUnion **tokenPtr, char **userPtr) {
668 char username[BUFSIZ]="";
669 struct ktc_token token;
671 #ifdef HAVE_NO_KRB5_524
675 char k4name[ANAME_SZ];
676 char k4inst[INST_SZ];
677 char k4realm[REALM_SZ];
679 void *inkey = get_cred_keydata(v5cred);
680 size_t inkey_sz = get_cred_keylen(v5cred);
682 afs_dprintf("Using Kerberos V5 ticket natively\n");
687 #ifndef HAVE_NO_KRB5_524
688 status = krb5_524_conv_principal (context, v5cred->client,
694 afs_com_err(progname, status,
695 "while converting principal to Kerberos V4 format");
697 strcpy (username, k4name);
699 strcat (username, ".");
700 strcat (username, k4inst);
704 len = min(get_princ_len(context, v5cred->client, 0),
705 second_comp(context, v5cred->client) ?
706 MAXKTCNAMELEN - 2 : MAXKTCNAMELEN - 1);
707 strncpy(username, get_princ_str(context, v5cred->client, 0), len);
708 username[len] = '\0';
710 if (second_comp(context, v5cred->client)) {
711 strcat(username, ".");
712 p = username + strlen(username);
713 len = min(get_princ_len(context, v5cred->client, 1),
714 MAXKTCNAMELEN - strlen(username) - 1);
715 strncpy(p, get_princ_str(context, v5cred->client, 1), len);
720 memset(&token, 0, sizeof(struct ktc_token));
722 token.kvno = RXKAD_TKT_TYPE_KERBEROS_V5;
723 token.startTime = v5cred->times.starttime;;
724 token.endTime = v5cred->times.endtime;
725 if (tkt_DeriveDesKey(get_creds_enctype(v5cred), inkey, inkey_sz,
726 &token.sessionKey) != 0) {
729 token.ticketLen = v5cred->ticket.length;
730 memcpy(token.ticket, v5cred->ticket.data, token.ticketLen);
732 status = token_importRxkadViceId(tokenPtr, &token, 0);
737 if (username[0] != '\0')
738 *userPtr = strdup(username);
744 * Convert a Keberos ticket to an rxkad token, using information obtained
745 * from an external Kerberos 5->4 conversion service. If the code is built
746 * with HAVE_NO_KRB5_524 then this is a stub function which will always
747 * return success without a token.
750 * An initialised Kerberos 5 context
752 * A Kerberos credentials structure containing a suitable service ticket
753 * @param[out] tokenPtr
754 * An AFS token structure containing an rxkad token. This is a malloc'd
755 * structure which should be freed by the caller.
756 * @param[out[ userPtr
757 * A string containing the principal of the user to whom the token was
758 * issued. This is a malloc'd block which should be freed by the caller,
762 * 0 on success, an error value upon failure
765 #ifdef HAVE_NO_KRB5_524
767 rxkad_get_converted_token(krb5_context context, krb5_creds *v5cred,
768 struct ktc_tokenUnion **tokenPtr, char **userPtr) {
776 rxkad_get_converted_token(krb5_context context, krb5_creds *v5cred,
777 struct ktc_tokenUnion **tokenPtr, char **userPtr) {
779 char username[BUFSIZ];
780 struct ktc_token token;
786 afs_dprintf("Using Kerberos 524 translator service\n");
788 status = krb5_524_convert_creds(context, v5cred, &cred);
791 afs_com_err(progname, status, "while converting tickets "
792 "to Kerberos V4 format");
793 return AKLOG_KERBEROS;
796 strcpy (username, cred.pname);
798 strcat (username, ".");
799 strcat (username, cred.pinst);
802 memset(&token, 0, sizeof(struct ktc_token));
804 token.kvno = cred.kvno;
805 token.startTime = cred.issue_date;
807 * It seems silly to go through a bunch of contortions to
808 * extract the expiration time, when the v5 credentials already
809 * has the exact time! Let's use that instead.
811 * Note that this isn't a security hole, as the expiration time
812 * is also contained in the encrypted token
814 token.endTime = v5cred->times.endtime;
815 memcpy(&token.sessionKey, cred.session, 8);
816 token.ticketLen = cred.ticket_st.length;
817 memcpy(token.ticket, cred.ticket_st.dat, token.ticketLen);
819 status = token_importRxkadViceId(tokenPtr, &token, 0);
824 *userPtr = strdup(username);
831 * This function gets an rxkad token for a given cell.
834 * An initialized Kerberos v5 context
836 * The cell information for the cell which we're obtaining a token for
838 * The realm to look in for the service principal. If NULL, then the
839 * realm is determined from the cell name or the user's credentials
840 * (see the documentation for rxkad_get_ticket)
842 * The rxkad token produced. This is a malloc'd structure which should
843 * be freed by the caller.
844 * @parma[out] authuser
845 * A string containing the principal of the user to whom the token was
846 * issued. This is a malloc'd block which should be freed by the caller,
848 * @param[out] foreign
849 * Whether the user is considered as 'foreign' to the realm of the cell.
852 * 0 on success, an error value upon failuer
855 rxkad_get_token(krb5_context context, struct afsconf_cell *cell, char *realm,
856 struct ktc_tokenUnion **token, char **authuser, int *foreign) {
858 char *realmUsed = NULL;
859 char *username = NULL;
866 status = rxkad_get_ticket(context, realm, cell, &v5cred, &realmUsed);
871 status = rxkad_get_converted_token(context, v5cred, token, &username);
873 status = rxkad_build_native_token(context, v5cred, token, &username);
878 /* We now have the username, plus the realm name, so stitch them together
879 * to give us the name that the ptserver will know the user by */
880 if (realmUsed == NULL || username == NULL) {
881 *authuser = username;
885 if (asprintf(authuser, "%s@%s", username, realmUsed) < 0) {
886 fprintf(stderr, "%s: Out of memory building PTS name\n", progname);
904 * Log to a cell. If the cell has already been logged to, return without
905 * doing anything. Otherwise, log to it and mark that it has been logged
909 auth_to_cell(krb5_context context, const char *config,
910 char *cell, char *realm, char **linkedcell)
912 int status = AKLOG_SUCCESS;
914 char *username = NULL; /* To hold client username structure */
915 afs_int32 viceId; /* AFS uid of user */
917 char *local_cell = NULL;
918 struct ktc_tokenUnion *rxkadToken = NULL;
919 struct ktc_setTokenData *token;
920 struct ktc_setTokenData *btoken = NULL;
921 struct afsconf_cell cellconf;
923 /* NULL or empty cell returns information on local cell */
924 if ((status = get_cellconfig(config, cell, &cellconf, &local_cell)))
927 if (linkedcell != NULL) {
928 if (cellconf.linkedCell != NULL) {
929 *linkedcell = strdup(cellconf.linkedCell);
930 if (*linkedcell == NULL) {
939 if (ll_string(&authedcells, ll_s_check, cellconf.name)) {
940 afs_dprintf("Already authenticated to %s (or tried to)\n", cellconf.name);
941 status = AKLOG_SUCCESS;
946 * Record that we have attempted to log to this cell. We do this
947 * before we try rather than after so that we will not try
948 * and fail repeatedly for one cell.
950 ll_string(&authedcells, ll_s_add, cellconf.name);
953 * Record this cell in the list of zephyr subscriptions. We may
954 * want zephyr subscriptions even if authentication fails.
955 * If this is done after we attempt to get tokens, aklog -zsubs
956 * can return something different depending on whether or not we
957 * are in -noauth mode.
959 if (ll_string(&zsublist, ll_s_add, cellconf.name) == LL_FAILURE) {
961 "%s: failure adding cell %s to zephyr subscriptions list.\n",
962 progname, cellconf.name);
965 if (ll_string(&zsublist, ll_s_add, local_cell) == LL_FAILURE) {
967 "%s: failure adding cell %s to zephyr subscriptions list.\n",
968 progname, local_cell);
973 afs_dprintf("Authenticating to cell %s (server %s).\n", cellconf.name,
974 cellconf.hostName[0]);
976 token = token_buildTokenJar(cellconf.name);
982 status = rxkad_get_token(context, &cellconf, realm, &rxkadToken,
983 &username, &isForeign);
987 /* We need to keep the token structure around so that we can stick
988 * the viceId into it (once we know it) */
989 status = token_addToken(token, rxkadToken);
991 afs_dprintf("Add Token failed with %d", status);
996 ktc_GetTokenEx(cellconf.name, &btoken) == 0 &&
997 token_SetsEquivalent(token, btoken)) {
999 token_FreeSet(&btoken);
1000 afs_dprintf("Identical tokens already exist; skipping.\n");
1001 status = AKLOG_SUCCESS;
1006 token_FreeSet(&btoken);
1012 if (username == NULL) {
1013 afs_dprintf("Not resolving name to id\n");
1016 afs_dprintf("Not resolving name %s to id (-noprdb set)\n", username);
1019 afs_dprintf("About to resolve name %s to id in cell %s.\n", username,
1022 if (!pr_Initialize (0, AFSDIR_CLIENT_ETC_DIRPATH, cellconf.name))
1023 status = pr_SNameToId (username, &viceId);
1026 afs_dprintf("Error %d\n", status);
1028 afs_dprintf("Id %d\n", (int) viceId);
1032 * This code is taken from cklog -- it lets people
1033 * automatically register with the ptserver in foreign cells
1036 #ifdef ALLOW_REGISTER
1037 if ((status == 0) && (viceId == ANONYMOUSID) && isForeign) {
1038 afs_dprintf("doing first-time registration of %s at %s\n",
1039 username, cellconf.name);
1042 status = ktc_SetTokenEx(token);
1044 afs_com_err(progname, status,
1045 "while obtaining tokens for cell %s",
1047 status = AKLOG_TOKEN;
1051 * In case you're wondering, we don't need to change the
1052 * filename here because we're still connecting to the
1053 * same cell -- we're just using a different authenticat ion
1057 if ((status = pr_Initialize(1L, AFSDIR_CLIENT_ETC_DIRPATH,
1059 printf("Error %d\n", status);
1062 if ((status = pr_CreateUser(username, &viceId))) {
1063 fprintf(stderr, "%s: %s so unable to create remote PTS "
1064 "user %s in cell %s (status: %d).\n", progname,
1065 afs_error_message(status), username, cellconf.name,
1067 viceId = ANONYMOUSID;
1069 printf("created cross-cell entry for %s (Id %d) at %s\n",
1070 username, viceId, cellconf.name);
1073 #endif /* ALLOW_REGISTER */
1075 if ((status == 0) && (viceId != ANONYMOUSID)) {
1076 status = token_setRxkadViceId(rxkadToken, viceId);
1078 fprintf(stderr, "Error %d setting rxkad ViceId\n", status);
1079 status = AKLOG_SUCCESS;
1081 token_replaceToken(token, rxkadToken);
1087 afs_dprintf("Setting tokens. %s @ %s\n",
1088 username, cellconf.name);
1090 afs_dprintf("Setting tokens for cell %s\n", cellconf.name);
1093 #ifndef AFS_AIX51_ENV
1094 /* on AIX 4.1.4 with AFS 3.4a+ if a write is not done before
1095 * this routine, it will not add the token. It is not clear what
1096 * is going on here! So we will do the following operation.
1097 * On AIX 5, it causes the parent program to die, so we won't.
1098 * We don't care about the return value, but need to collect it
1099 * to avoid compiler warnings.
1101 if (write(2,"",0) < 0) {
1102 /* dummy write, don't care */
1105 token_setPag(token, afssetpag);
1106 status = ktc_SetTokenEx(token);
1108 afs_com_err(progname, status, "while setting tokens for cell %s",
1110 status = AKLOG_TOKEN;
1114 afs_dprintf("Noauth mode; not authenticating.\n");
1118 token_freeToken(&rxkadToken);
1130 get_afs_mountpoint(char *file, char *mountpoint, int size)
1133 char V ='V'; /* AFS has problem on Sun with pioctl */
1135 char our_file[MAXPATHLEN + 1];
1137 char *last_component;
1138 struct ViceIoctl vio;
1139 char cellname[BUFSIZ];
1141 strlcpy(our_file, file, sizeof(our_file));
1143 if ((last_component = strrchr(our_file, DIR))) {
1144 *last_component++ = 0;
1145 parent_dir = our_file;
1148 last_component = our_file;
1152 memset(cellname, 0, sizeof(cellname));
1154 vio.in = last_component;
1155 vio.in_size = strlen(last_component)+1;
1156 vio.out_size = size;
1157 vio.out = mountpoint;
1159 if (!pioctl(parent_dir, VIOC_AFS_STAT_MT_PT, &vio, 0)) {
1160 if (strchr(mountpoint, VOLMARKER) == NULL) {
1162 vio.in_size = strlen(file) + 1;
1163 vio.out_size = sizeof(cellname);
1166 if (!pioctl(file, VIOC_FILE_CELL_NAME, &vio, 1)) {
1167 strlcat(cellname, VOLMARKERSTRING, sizeof(cellname));
1168 strlcat(cellname, mountpoint + 1, sizeof(cellname));
1169 memset(mountpoint + 1, 0, size - 1);
1170 strcpy(mountpoint + 1, cellname);
1180 * This routine each time it is called returns the next directory
1181 * down a pathname. It resolves all symbolic links. The first time
1182 * it is called, it should be called with the name of the path
1183 * to be descended. After that, it should be called with the arguemnt
1187 next_path(char *origpath)
1189 static char path[MAXPATHLEN + 1];
1190 static char pathtocheck[MAXPATHLEN + 1];
1192 ssize_t link; /* Return value from readlink */
1193 char linkbuf[MAXPATHLEN + 1];
1194 char tmpbuf[MAXPATHLEN + 1];
1196 static char *last_comp; /* last component of directory name */
1197 static char *elast_comp; /* End of last component */
1201 static int symlinkcount = 0; /* We can't exceed MAXSYMLINKS */
1203 /* If we are given something for origpath, we are initializing only. */
1205 memset(path, 0, sizeof(path));
1206 memset(pathtocheck, 0, sizeof(pathtocheck));
1207 strlcpy(path, origpath, sizeof(path));
1213 /* We were not given origpath; find then next path to check */
1215 /* If we've gotten all the way through already, return NULL */
1216 if (last_comp == NULL)
1220 while (*last_comp == DIR)
1221 strncat(pathtocheck, last_comp++, 1);
1222 len = (elast_comp = strchr(last_comp, DIR))
1223 ? elast_comp - last_comp : strlen(last_comp);
1224 strncat(pathtocheck, last_comp, len);
1225 memset(linkbuf, 0, sizeof(linkbuf));
1226 link = readlink(pathtocheck, linkbuf, sizeof(linkbuf)-1);
1229 linkbuf[link] = '\0'; /* NUL terminate string */
1231 if (++symlinkcount > MAXSYMLINKS) {
1232 fprintf(stderr, "%s: %s\n", progname, strerror(ELOOP));
1233 exit(AKLOG_BADPATH);
1236 memset(tmpbuf, 0, sizeof(tmpbuf));
1238 strlcpy(tmpbuf, elast_comp, sizeof(tmpbuf));
1239 if (linkbuf[0] == DIR) {
1241 * If this is a symbolic link to an absolute path,
1242 * replace what we have by the absolute path.
1244 memset(path, 0, strlen(path));
1245 memcpy(path, linkbuf, sizeof(linkbuf));
1246 strcat(path, tmpbuf);
1249 memset(pathtocheck, 0, sizeof(pathtocheck));
1253 * If this is a symbolic link to a relative path,
1254 * replace only the last component with the link name.
1256 strncpy(last_comp, linkbuf, strlen(linkbuf) + 1);
1257 strcat(path, tmpbuf);
1259 if ((t = strrchr(pathtocheck, DIR))) {
1261 memset(t, 0, strlen(t));
1264 memset(pathtocheck, 0, sizeof(pathtocheck));
1268 last_comp = elast_comp;
1272 return(pathtocheck);
1276 add_hosts(char *file)
1279 char V = 'V'; /* AFS has problem on SunOS */
1281 struct ViceIoctl vio;
1282 char outbuf[BUFSIZ];
1288 memset(outbuf, 0, sizeof(outbuf));
1290 vio.out_size = sizeof(outbuf);
1294 afs_dprintf("Getting list of hosts for %s\n", file);
1296 /* Don't worry about errors. */
1297 if (!pioctl(file, VIOCWHEREIS, &vio, 1)) {
1298 phosts = (long *) outbuf;
1301 * Lists hosts that we care about. If ALLHOSTS is defined,
1302 * then all hosts that you ever may possible go through are
1303 * included in this list. If not, then only hosts that are
1304 * the only ones appear. That is, if a volume you must use
1305 * is replaced on only one server, that server is included.
1306 * If it is replicated on many servers, then none are included.
1307 * This is not perfect, but the result is that people don't
1308 * get subscribed to a lot of instances of FILSRV that they
1309 * probably won't need which reduces the instances of
1310 * people getting messages that don't apply to them.
1313 if (phosts[1] != '\0')
1316 for (i = 0; phosts[i]; i++) {
1318 in.s_addr = phosts[i];
1319 afs_dprintf("Got host %s\n", inet_ntoa(in));
1320 ll_string(&hostlist, ll_s_add, (char *)inet_ntoa(in));
1322 if (zsubs && (hp=gethostbyaddr((char *) &phosts[i],sizeof(long),AF_INET))) {
1323 afs_dprintf("Got host %s\n", hp->h_name);
1324 ll_string(&zsublist, ll_s_add, hp->h_name);
1331 * This routine descends through a path to a directory, logging to
1332 * every cell it encounters along the way.
1335 auth_to_path(krb5_context context, const char *config, char *path)
1337 int status = AKLOG_SUCCESS;
1338 int auth_status = AKLOG_SUCCESS;
1341 char pathtocheck[MAXPATHLEN + 1];
1342 char mountpoint[MAXPATHLEN + 1];
1351 strlcpy(pathtocheck, path, sizeof(pathtocheck));
1353 if (getcwd(pathtocheck, sizeof(pathtocheck)) == NULL) {
1354 fprintf(stderr, "Unable to find current working directory:\n");
1355 fprintf(stderr, "%s\n", pathtocheck);
1356 fprintf(stderr, "Try an absolute pathname.\n");
1357 exit(AKLOG_BADPATH);
1360 strlcat(pathtocheck, DIRSTRING, sizeof(pathtocheck));
1361 strlcat(pathtocheck, path, sizeof(pathtocheck));
1364 next_path(pathtocheck);
1366 /* Go on to the next level down the path */
1367 while ((nextpath = next_path(NULL))) {
1368 strlcpy(pathtocheck, nextpath, sizeof(pathtocheck));
1369 afs_dprintf("Checking directory %s\n", pathtocheck);
1371 * If this is an afs mountpoint, determine what cell from
1372 * the mountpoint name which is of the form
1373 * #cellname:volumename or %cellname:volumename.
1375 if (get_afs_mountpoint(pathtocheck, mountpoint, sizeof(mountpoint))) {
1376 /* skip over the '#' or '%' */
1377 cell = mountpoint + 1;
1378 /* Add this (cell:volumename) to the list of zsubs */
1380 ll_string(&zsublist, ll_s_add, cell);
1382 add_hosts(pathtocheck);
1383 if ((endofcell = strchr(mountpoint, VOLMARKER))) {
1385 auth_status = auth_to_cell(context, config, cell, NULL, NULL);
1387 if (status == AKLOG_SUCCESS)
1388 status = auth_status;
1389 else if (status != auth_status)
1390 status = AKLOG_SOMETHINGSWRONG;
1395 if (isdir(pathtocheck, &isdirectory) < 0) {
1397 * If we've logged and still can't stat, there's
1400 fprintf(stderr, "%s: stat(%s): %s\n", progname,
1401 pathtocheck, strerror(errno));
1402 return(AKLOG_BADPATH);
1404 else if (! isdirectory) {
1405 /* Allow only directories */
1406 fprintf(stderr, "%s: %s: %s\n", progname, pathtocheck,
1408 return(AKLOG_BADPATH);
1418 /* Print usage message and exit */
1422 fprintf(stderr, "\nUsage: %s %s%s%s\n", progname,
1423 "[-d] [[-cell | -c] cell [-k krb_realm]] ",
1424 "[[-p | -path] pathname]\n",
1425 " [-zsubs] [-hosts] [-noauth] [-noprdb] [-force] [-setpag] \n"
1427 #ifndef HAVE_NO_KRB5_524
1431 fprintf(stderr, " -d gives debugging information.\n");
1432 fprintf(stderr, " krb_realm is the kerberos realm of a cell.\n");
1433 fprintf(stderr, " pathname is the name of a directory to which ");
1434 fprintf(stderr, "you wish to authenticate.\n");
1435 fprintf(stderr, " -zsubs gives zephyr subscription information.\n");
1436 fprintf(stderr, " -hosts gives host address information.\n");
1437 fprintf(stderr, " -noauth does not attempt to get tokens.\n");
1438 fprintf(stderr, " -noprdb means don't try to determine AFS ID.\n");
1439 fprintf(stderr, " -force means replace identical tickets. \n");
1440 fprintf(stderr, " -linked means if AFS node is linked, try both. \n");
1441 fprintf(stderr, " -setpag set the AFS process authentication group.\n");
1442 #ifndef HAVE_NO_KRB5_524
1443 fprintf(stderr, " -524 means use the 524 converter instead of V5 directly\n");
1445 fprintf(stderr, " No commandline arguments means ");
1446 fprintf(stderr, "authenticate to the local cell.\n");
1447 fprintf(stderr, "\n");
1452 main(int argc, char *argv[])
1454 krb5_context context;
1455 int status = AKLOG_SUCCESS;
1457 int somethingswrong = FALSE;
1459 cellinfo_t cellinfo;
1461 extern char *progname; /* Name of this program */
1463 int cmode = FALSE; /* Cellname mode */
1464 int pmode = FALSE; /* Path name mode */
1466 char realm[REALM_SZ]; /* Kerberos realm of afs server */
1467 char cell[BUFSIZ]; /* Cell to which we are authenticating */
1468 char path[MAXPATHLEN + 1]; /* Path length for path mode */
1470 linked_list cells; /* List of cells to log to */
1471 linked_list paths; /* List of paths to log to */
1474 const char *config = AFSDIR_CLIENT_ETC_DIRPATH;
1476 memset(&cellinfo, 0, sizeof(cellinfo));
1478 memset(realm, 0, sizeof(realm));
1479 memset(cell, 0, sizeof(cell));
1480 memset(path, 0, sizeof(path));
1488 /* Store the program name here for error messages */
1489 if ((progname = strrchr(argv[0], DIR)))
1494 #if defined(KRB5_PROG_ETYPE_NOSUPP) && !(defined(HAVE_KRB5_ENCTYPE_ENABLE) || defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO))
1496 char *filepath = NULL, *newpath = NULL;
1497 #ifndef AFS_DARWIN_ENV
1498 char *defaultpath = "/etc/krb5.conf:/etc/krb5/krb5.conf";
1500 char *defaultpath = "~/Library/Preferences/edu.mit.Kerberos:/Library/Preferences/edu.mit.Kerberos";
1502 filepath = getenv("KRB5_CONFIG");
1504 /* only fiddle with KRB5_CONFIG if krb5-weak.conf actually exists */
1505 if (asprintf(&newpath, "%s/krb5-weak.conf",
1506 AFSDIR_CLIENT_ETC_DIRPATH) < 0)
1508 if (newpath != NULL && access(newpath, R_OK) == 0) {
1511 if (asprintf(&newpath, "%s:%s/krb5-weak.conf",
1512 filepath ? filepath : defaultpath,
1513 AFSDIR_CLIENT_ETC_DIRPATH) < 0)
1516 setenv("KRB5_CONFIG", newpath, 1);
1519 krb5_init_context(&context);
1521 #if defined(KRB5_PROG_ETYPE_NOSUPP) && !(defined(HAVE_KRB5_ENCTYPE_ENABLE) || defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO))
1525 setenv("KRB5_CONFIG", filepath, 1);
1527 unsetenv("KRB5_CONFIG");
1530 initialize_KTC_error_table ();
1531 initialize_U_error_table();
1532 initialize_RXK_error_table();
1533 initialize_ACFG_error_table();
1534 initialize_PT_error_table();
1535 afs_set_com_err_hook(redirect_errors);
1538 * Enable DES enctypes, which are currently still required for AFS.
1539 * krb5_allow_weak_crypto is MIT Kerberos 1.8. krb5_enctype_enable is
1542 #if defined(HAVE_KRB5_ENCTYPE_ENABLE)
1543 i = krb5_enctype_valid(context, ETYPE_DES_CBC_CRC);
1545 krb5_enctype_enable(context, ETYPE_DES_CBC_CRC);
1546 #elif defined(HAVE_KRB5_ALLOW_WEAK_CRYPTO)
1547 krb5_allow_weak_crypto(context, 1);
1550 /* Initialize list of cells to which we have authenticated */
1551 ll_init(&authedcells);
1553 /* Parse commandline arguments and make list of what to do. */
1554 for (i = 1; i < argc; i++) {
1555 if (strcmp(argv[i], "-d") == 0)
1557 else if (strcmp(argv[i], "-noauth") == 0)
1559 else if (strcmp(argv[i], "-zsubs") == 0)
1561 else if (strcmp(argv[i], "-hosts") == 0)
1563 else if (strcmp(argv[i], "-noprdb") == 0)
1565 else if (strcmp(argv[i], "-linked") == 0)
1567 else if (strcmp(argv[i], "-force") == 0)
1569 #ifndef HAVE_NO_KRB5_524
1570 else if (strcmp(argv[i], "-524") == 0)
1573 else if (strcmp(argv[i], "-setpag") == 0)
1575 else if (((strcmp(argv[i], "-cell") == 0) ||
1576 (strcmp(argv[i], "-c") == 0)) && !pmode)
1579 strlcpy(cell, argv[i], sizeof(cell));
1583 else if ((strcmp(argv[i], "-keytab") == 0))
1589 else if ((strcmp(argv[i], "-principal") == 0))
1595 else if (((strcmp(argv[i], "-path") == 0) ||
1596 (strcmp(argv[i], "-p") == 0)) && !cmode)
1599 strlcpy(path, argv[i], sizeof(path));
1603 else if (strcmp(argv[i], "-config") == 0)
1609 else if (argv[i][0] == '-')
1611 else if (!pmode && !cmode) {
1612 if (strchr(argv[i], DIR) || (strcmp(argv[i], ".") == 0) ||
1613 (strcmp(argv[i], "..") == 0)) {
1615 strlcpy(path, argv[i], sizeof(path));
1619 strlcpy(cell, argv[i], sizeof(cell));
1626 if (((i + 1) < argc) && (strcmp(argv[i + 1], "-k") == 0)) {
1629 strlcpy(realm, argv[i], sizeof(realm));
1633 /* Add this cell to list of cells */
1634 strcpy(cellinfo.cell, cell);
1635 strcpy(cellinfo.realm, realm);
1636 if ((cur_node = ll_add_node(&cells, ll_tail))) {
1638 if ((new_cellinfo = copy_cellinfo(&cellinfo)))
1639 ll_add_data(cur_node, new_cellinfo);
1642 "%s: failure copying cellinfo.\n", progname);
1647 fprintf(stderr, "%s: failure adding cell to cells list.\n",
1651 memset(&cellinfo, 0, sizeof(cellinfo));
1653 memset(cell, 0, sizeof(cell));
1654 memset(realm, 0, sizeof(realm));
1657 /* Add this path to list of paths */
1658 if ((cur_node = ll_add_node(&paths, ll_tail))) {
1660 if ((new_path = strdup(path)))
1661 ll_add_data(cur_node, new_path);
1663 fprintf(stderr, "%s: failure copying path name.\n",
1669 fprintf(stderr, "%s: failure adding path to paths list.\n",
1674 memset(path, 0, sizeof(path));
1678 /* If nothing was given, log to the local cell. */
1679 if ((cells.nelements + paths.nelements) == 0) {
1682 status = auth_to_cell(context, config, NULL, NULL, &linkedcell);
1684 /* If this cell is linked to a DCE cell, and user requested -linked,
1685 * get tokens for both. This is very useful when the AFS cell is
1686 * linked to a DFS cell and this system does not also have DFS.
1689 if (!status && linked && linkedcell != NULL) {
1690 afs_dprintf("Linked cell: %s\n", linkedcell);
1691 status = auth_to_cell(context, config, linkedcell, NULL, NULL);
1699 * Local hack - if the person has a file in their home
1700 * directory called ".xlog", read that for a list of
1701 * extra cells to authenticate to
1704 if ((pwd = getpwuid(getuid())) != NULL) {
1707 char fcell[100], xlog_path[512];
1709 strlcpy(xlog_path, pwd->pw_dir, sizeof(xlog_path));
1710 strlcat(xlog_path, "/.xlog", sizeof(xlog_path));
1712 if ((stat(xlog_path, &sbuf) == 0) &&
1713 ((f = fopen(xlog_path, "r")) != NULL)) {
1715 afs_dprintf("Reading %s for cells to authenticate to.\n",
1718 while (fgets(fcell, 100, f) != NULL) {
1721 fcell[strlen(fcell) - 1] = '\0';
1723 afs_dprintf("Found cell %s in %s.\n", fcell, xlog_path);
1725 auth_status = auth_to_cell(context, config, fcell, NULL, NULL);
1726 if (status == AKLOG_SUCCESS)
1727 status = auth_status;
1729 status = AKLOG_SOMETHINGSWRONG;
1735 /* Log to all cells in the cells list first */
1736 for (cur_node = cells.first; cur_node; cur_node = cur_node->next) {
1737 memcpy((char *)&cellinfo, cur_node->data, sizeof(cellinfo));
1738 status = auth_to_cell(context, config, cellinfo.cell,
1739 cellinfo.realm, &linkedcell);
1743 if (linked && linkedcell != NULL) {
1744 afs_dprintf("Linked cell: %s\n", linkedcell);
1745 status = auth_to_cell(context, config, linkedcell,
1746 cellinfo.realm, NULL);
1750 if (linkedcell != NULL) {
1757 /* Then, log to all paths in the paths list */
1758 for (cur_node = paths.first; cur_node; cur_node = cur_node->next) {
1759 status = auth_to_path(context, config, cur_node->data);
1765 * If only one thing was logged to, we'll return the status
1766 * of the single call. Otherwise, we'll return a generic
1767 * something failed status.
1769 if (somethingswrong && ((cells.nelements + paths.nelements) > 1))
1770 status = AKLOG_SOMETHINGSWRONG;
1773 /* If we are keeping track of zephyr subscriptions, print them. */
1775 for (cur_node = zsublist.first; cur_node; cur_node = cur_node->next) {
1776 printf("zsub: %s\n", cur_node->data);
1779 /* If we are keeping track of host information, print it. */
1781 for (cur_node = hostlist.first; cur_node; cur_node = cur_node->next) {
1782 printf("host: %s\n", cur_node->data);
1789 isdir(char *path, unsigned char *val)
1791 struct stat statbuf;
1793 if (lstat(path, &statbuf) < 0)
1796 if ((statbuf.st_mode & S_IFMT) == S_IFDIR)
1804 static krb5_error_code
1805 get_credv5_akimpersonate(krb5_context context,
1807 krb5_principal service_principal,
1808 krb5_principal client_principal,
1811 int *allowed_enctypes,
1813 krb5_creds** out_creds /* out */ )
1815 #if defined(USING_HEIMDAL) || (defined(HAVE_ENCODE_KRB5_ENC_TKT) && defined(HAVE_ENCODE_KRB5_TICKET) && defined(HAVE_KRB5_C_ENCRYPT))
1816 krb5_error_code code;
1818 krb5_kt_cursor cursor[1];
1819 krb5_keytab_entry entry[1];
1821 krb5_creds *creds = 0;
1822 krb5_enctype enctype;
1824 krb5_keyblock session_key[1];
1826 Ticket ticket_reply[1];
1827 EncTicketPart enc_tkt_reply[1];
1828 krb5_address address[30];
1829 krb5_addresses faddr[1];
1830 unsigned int temp_vno[1];
1831 time_t temp_time[2];
1833 krb5_ticket ticket_reply[1];
1834 krb5_enc_tkt_part enc_tkt_reply[1];
1835 krb5_address address[30], *faddr[30];
1839 static int any_enctype[] = {0};
1841 if (!(creds = malloc(sizeof *creds))) {
1845 if (!allowed_enctypes)
1846 allowed_enctypes = any_enctype;
1849 enctype = 0; /* AKIMPERSONATE_IGNORE_ENCTYPE */
1850 kvno = 0; /* AKIMPERSONATE_IGNORE_VNO */
1851 memset((char*)creds, 0, sizeof *creds);
1852 memset((char*)entry, 0, sizeof *entry);
1853 memset((char*)session_key, 0, sizeof *session_key);
1854 memset((char*)ticket_reply, 0, sizeof *ticket_reply);
1855 memset((char*)enc_tkt_reply, 0, sizeof *enc_tkt_reply);
1856 code = krb5_kt_resolve(context, keytab, &kt);
1859 afs_com_err(progname, code, "while resolving keytab %s", keytab);
1861 afs_com_err(progname, code, "while resolving default keytab");
1865 if (service_principal) {
1866 for (i = 0; (enctype = allowed_enctypes[i]) || !i; ++i) {
1867 code = krb5_kt_get_entry(context,
1874 if (allowed_enctypes[i])
1875 deref_keyblock_enctype(session_key) = allowed_enctypes[i];
1880 afs_com_err(progname, code,"while scanning keytab entries");
1884 krb5_keytab_entry new[1];
1886 memset(new, 0, sizeof *new);
1887 if ((code = krb5_kt_start_seq_get(context, kt, cursor))) {
1888 afs_com_err(progname, code, "while starting keytab scan");
1891 while (!(code = krb5_kt_next_entry(context, kt, new, cursor))) {
1893 allowed_enctypes[i] && allowed_enctypes[i]
1894 != deref_entry_enctype(new); ++i)
1896 if ((!i || allowed_enctypes[i]) &&
1897 (best < 0 || best > i)) {
1898 krb5_free_keytab_entry_contents(context, entry);
1900 memset(new, 0, sizeof *new);
1901 } else krb5_free_keytab_entry_contents(context, new);
1903 if ((i = krb5_kt_end_seq_get(context, kt, cursor))) {
1904 afs_com_err(progname, i, "while ending keytab scan");
1909 afs_com_err(progname, code, "while scanning keytab");
1912 deref_keyblock_enctype(session_key) = deref_entry_enctype(entry);
1918 if ((code = krb5_generate_random_keyblock(context,
1919 deref_keyblock_enctype(session_key), session_key))) {
1920 afs_com_err(progname, code, "while making session key");
1923 enc_tkt_reply->flags.initial = 1;
1924 enc_tkt_reply->transited.tr_type = DOMAIN_X500_COMPRESS;
1925 enc_tkt_reply->cname = client_principal->name;
1926 enc_tkt_reply->crealm = client_principal->realm;
1927 enc_tkt_reply->key = *session_key;
1929 static krb5_data empty_string;
1930 enc_tkt_reply->transited.contents = empty_string;
1932 enc_tkt_reply->authtime = starttime;
1933 enc_tkt_reply->starttime = temp_time;
1934 *enc_tkt_reply->starttime = starttime;
1936 enc_tkt_reply->renew_till = temp_time + 1;
1937 *enc_tkt_reply->renew_till = endtime;
1939 enc_tkt_reply->endtime = endtime;
1941 if ((code = krb5_c_make_random_key(context,
1942 deref_keyblock_enctype(session_key), session_key))) {
1943 afs_com_err(progname, code, "while making session key");
1946 enc_tkt_reply->magic = KV5M_ENC_TKT_PART;
1947 #define DATACAST (unsigned char *)
1948 enc_tkt_reply->flags |= TKT_FLG_INITIAL;
1949 enc_tkt_reply->transited.tr_type = KRB5_DOMAIN_X500_COMPRESS;
1950 enc_tkt_reply->session = session_key;
1951 enc_tkt_reply->client = client_principal;
1953 static krb5_data empty_string;
1954 enc_tkt_reply->transited.tr_contents = empty_string;
1956 enc_tkt_reply->times.authtime = starttime;
1957 enc_tkt_reply->times.starttime = starttime; /* krb524init needs this */
1958 enc_tkt_reply->times.endtime = endtime;
1959 #endif /* USING_HEIMDAL */
1960 /* NB: We will discard address for now--ignoring caddr field
1961 in any case. MIT branch does what it always did. */
1963 if (paddress && *paddress) {
1964 deref_enc_tkt_addrs(enc_tkt_reply) = faddr;
1967 faddr->val = address;
1969 for (i = 0; paddress[i]; ++i) {
1971 address[i].addr_type = KRB5_ADDRESS_INET;
1972 address[i].address.data = (void*)(paddress+i);
1973 address[i].address.length = sizeof(paddress[i]);
1976 address[i].magic = KV5M_ADDRESS;
1977 address[i].addrtype = ADDRTYPE_INET;
1979 address[i].addrtype = AF_INET;
1981 address[i].contents = (void*)(paddress+i);
1982 address[i].length = sizeof(int);
1983 faddr[i] = address+i;
1994 ticket_reply->sname = service_principal->name;
1995 ticket_reply->realm = service_principal->realm;
1997 { /* crypto block */
1998 krb5_crypto crypto = 0;
1999 unsigned char *buf = 0;
2000 size_t buf_size, buf_len;
2003 ASN1_MALLOC_ENCODE(EncTicketPart, buf, buf_size,
2004 enc_tkt_reply, &buf_len, code);
2006 afs_com_err(progname, code, "while encoding ticket");
2010 if(buf_len != buf_size) {
2011 afs_com_err(progname, code,
2012 "%u != %u while encoding ticket (internal ASN.1 encoder error",
2013 (unsigned int)buf_len, (unsigned int)buf_size);
2016 what = "krb5_crypto_init";
2017 code = krb5_crypto_init(context,
2018 &deref_entry_keyblock(entry),
2019 deref_entry_enctype(entry),
2022 what = "krb5_encrypt";
2023 code = krb5_encrypt_EncryptedData(context, crypto, KRB5_KU_TICKET,
2024 buf, buf_len, entry->vno, &(ticket_reply->enc_part));
2027 if (crypto) krb5_crypto_destroy(context, crypto);
2029 afs_com_err(progname, code, "while %s", what);
2032 } /* crypto block */
2033 ticket_reply->enc_part.etype = deref_entry_enctype(entry);
2034 ticket_reply->enc_part.kvno = (void *)temp_vno;
2035 *ticket_reply->enc_part.kvno = entry->vno;
2036 ticket_reply->tkt_vno = 5;
2038 ticket_reply->server = service_principal;
2039 ticket_reply->enc_part2 = enc_tkt_reply;
2040 if ((code = krb5_encrypt_tkt_part(context, &deref_entry_keyblock(entry), ticket_reply))) {
2041 afs_com_err(progname, code, "while making ticket");
2044 ticket_reply->enc_part.kvno = entry->vno;
2047 /* Construct Creds */
2049 if ((code = krb5_copy_principal(context, service_principal,
2051 afs_com_err(progname, code, "while copying service principal");
2054 if ((code = krb5_copy_principal(context, client_principal,
2056 afs_com_err(progname, code, "while copying client principal");
2059 if ((code = krb5_copy_keyblock_contents(context, session_key,
2060 &deref_session_key(creds)))) {
2061 afs_com_err(progname, code, "while copying session key");
2066 creds->times.authtime = enc_tkt_reply->authtime;
2067 creds->times.starttime = *(enc_tkt_reply->starttime);
2068 creds->times.endtime = enc_tkt_reply->endtime;
2069 creds->times.renew_till = 0; /* *(enc_tkt_reply->renew_till) */
2070 creds->flags.b = enc_tkt_reply->flags;
2072 creds->times = enc_tkt_reply->times;
2073 creds->ticket_flags = enc_tkt_reply->flags;
2075 if (!deref_enc_tkt_addrs(enc_tkt_reply))
2077 else if ((code = krb5_copy_addresses(context,
2078 deref_enc_tkt_addrs(enc_tkt_reply), &creds->addresses))) {
2079 afs_com_err(progname, code, "while copying addresses");
2085 size_t creds_tkt_len;
2086 ASN1_MALLOC_ENCODE(Ticket, creds->ticket.data, creds->ticket.length,
2087 ticket_reply, &creds_tkt_len, code);
2089 afs_com_err(progname, code, "while encoding ticket");
2094 if ((code = encode_krb5_ticket(ticket_reply, &temp))) {
2095 afs_com_err(progname, code, "while encoding ticket");
2098 creds->ticket = *temp;
2105 if (deref_enc_data(&ticket_reply->enc_part))
2106 free(deref_enc_data(&ticket_reply->enc_part));
2107 krb5_free_keytab_entry_contents(context, entry);
2108 if (client_principal)
2109 krb5_free_principal(context, client_principal);
2110 if (service_principal)
2111 krb5_free_principal(context, service_principal);
2113 krb5_cc_close(context, cc);
2115 krb5_kt_close(context, kt);
2116 if (creds) krb5_free_creds(context, creds);
2117 krb5_free_keyblock_contents(context, session_key);
2125 static krb5_error_code
2126 get_credv5(krb5_context context, char *name, char *inst, char *realm,
2131 static krb5_principal client_principal = 0;
2133 afs_dprintf("Getting tickets: %s%s%s@%s\n", name,
2134 (inst && inst[0]) ? "/" : "", inst ? inst : "", realm);
2136 memset(&increds, 0, sizeof(increds));
2137 /* ANL - instance may be ptr to a null string. Pass null then */
2138 if ((r = krb5_build_principal(context, &increds.server,
2139 strlen(realm), realm,
2141 (inst && strlen(inst)) ? inst : NULL,
2147 if (!_krb425_ccache) {
2148 r = krb5_cc_default(context, &_krb425_ccache);
2152 if (!client_principal) {
2154 r = krb5_parse_name(context, client, &client_principal);
2156 r = krb5_cc_get_principal(context, _krb425_ccache, &client_principal);
2162 increds.client = client_principal;
2163 increds.times.endtime = 0;
2165 /* Ask for DES since that is what V4 understands */
2166 get_creds_enctype((&increds)) = ENCTYPE_DES_CBC_CRC;
2169 int allowed_enctypes[] = {
2170 ENCTYPE_DES_CBC_CRC, 0
2173 r = get_credv5_akimpersonate(context,
2182 r = krb5_get_credentials(context, 0, _krb425_ccache, &increds, creds);
2189 get_user_realm(krb5_context context, char **realm)
2191 static krb5_principal client_principal = 0;
2192 krb5_error_code r = 0;
2196 if (!_krb425_ccache) {
2197 r = krb5_cc_default(context, &_krb425_ccache);
2201 if (!client_principal) {
2203 r = krb5_parse_name(context, client, &client_principal);
2205 r = krb5_cc_get_principal(context, _krb425_ccache, &client_principal);
2211 *realm = extract_realm(context, client_principal);