2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
3 * Authors: Doug Rabson <dfr@rabson.org>
4 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
33 #include <sys/linker.h>
34 #include <sys/module.h>
35 #include <sys/queue.h>
36 #include <sys/syslog.h>
41 #ifndef WITHOUT_KERBEROS
51 #include <gssapi/gssapi.h>
53 #include <rpc/rpc_com.h>
57 #ifndef _PATH_GSS_MECH
58 #define _PATH_GSS_MECH "/etc/gss/mech"
60 #ifndef _PATH_GSSDSOCK
61 #define _PATH_GSSDSOCK "/var/run/gssd.sock"
63 #define GSSD_CREDENTIAL_CACHE_FILE "/tmp/krb5cc_gssd"
66 LIST_ENTRY(gss_resource) gr_link;
67 uint64_t gr_id; /* indentifier exported to kernel */
68 void* gr_res; /* GSS-API resource pointer */
70 LIST_HEAD(gss_resource_list, gss_resource) gss_resources;
71 int gss_resource_count;
73 uint32_t gss_start_time;
75 static char ccfile_dirlist[PATH_MAX + 1], ccfile_substring[NAME_MAX + 1];
76 static char pref_realm[1024];
78 static int use_old_des;
79 static int hostbased_initiator_cred;
80 #ifndef WITHOUT_KERBEROS
81 /* 1.2.752.43.13.14 */
82 static gss_OID_desc gss_krb5_set_allowable_enctypes_x_desc =
83 {6, (void *) "\x2a\x85\x70\x2b\x0d\x0e"};
84 static gss_OID GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X =
85 &gss_krb5_set_allowable_enctypes_x_desc;
86 static gss_OID_desc gss_krb5_mech_oid_x_desc =
87 {9, (void *) "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02" };
88 static gss_OID GSS_KRB5_MECH_OID_X =
89 &gss_krb5_mech_oid_x_desc;
92 static void gssd_load_mech(void);
93 static int find_ccache_file(const char *, uid_t, char *);
94 static int is_a_valid_tgt_cache(const char *, uid_t, int *, time_t *);
95 static void gssd_verbose_out(const char *, ...);
96 #ifndef WITHOUT_KERBEROS
97 static krb5_error_code gssd_get_cc_from_keytab(const char *);
98 static OM_uint32 gssd_get_user_cred(OM_uint32 *, uid_t, gss_cred_id_t *);
100 void gssd_terminate(int);
102 extern void gssd_1(struct svc_req *rqstp, SVCXPRT *transp);
103 extern int gssd_syscall(char *path);
106 main(int argc, char **argv)
109 * We provide an RPC service on a local-domain socket. The
110 * kernel's GSS-API code will pass what it can't handle
113 struct sockaddr_un sun;
114 int fd, oldmask, ch, debug;
118 * Initialize the credential cache file name substring and the
119 * search directory list.
121 strlcpy(ccfile_substring, "krb5cc_", sizeof(ccfile_substring));
122 ccfile_dirlist[0] = '\0';
123 pref_realm[0] = '\0';
126 while ((ch = getopt(argc, argv, "dhovs:c:r:")) != -1) {
132 #ifndef WITHOUT_KERBEROS
134 * Enable use of a host based initiator credential
135 * in the default keytab file.
137 hostbased_initiator_cred = 1;
139 errx(1, "This option not available when built"
140 " without MK_KERBEROS\n");
144 #ifndef WITHOUT_KERBEROS
146 * Force use of DES and the old type of GSSAPI token.
150 errx(1, "This option not available when built"
151 " without MK_KERBEROS\n");
158 #ifndef WITHOUT_KERBEROS
160 * Set the directory search list. This enables use of
161 * find_ccache_file() to search the directories for a
162 * suitable credentials cache file.
164 strlcpy(ccfile_dirlist, optarg, sizeof(ccfile_dirlist));
166 errx(1, "This option not available when built"
167 " without MK_KERBEROS\n");
172 * Specify a non-default credential cache file
175 strlcpy(ccfile_substring, optarg,
176 sizeof(ccfile_substring));
180 * Set the preferred realm for the credential cache tgt.
182 strlcpy(pref_realm, optarg, sizeof(pref_realm));
186 "usage: %s [-d] [-s dir-list] [-c file-substring]"
187 " [-r preferred-realm]\n", argv[0]);
196 if (daemon(0, 0) != 0)
197 err(1, "Can't daemonize");
198 signal(SIGINT, SIG_IGN);
199 signal(SIGQUIT, SIG_IGN);
200 signal(SIGHUP, SIG_IGN);
202 signal(SIGTERM, gssd_terminate);
204 memset(&sun, 0, sizeof sun);
205 sun.sun_family = AF_LOCAL;
206 unlink(_PATH_GSSDSOCK);
207 strcpy(sun.sun_path, _PATH_GSSDSOCK);
208 sun.sun_len = SUN_LEN(&sun);
209 fd = socket(AF_LOCAL, SOCK_STREAM, 0);
211 if (debug_level == 0) {
212 syslog(LOG_ERR, "Can't create local gssd socket");
215 err(1, "Can't create local gssd socket");
217 oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
218 if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
219 if (debug_level == 0) {
220 syslog(LOG_ERR, "Can't bind local gssd socket");
223 err(1, "Can't bind local gssd socket");
226 if (listen(fd, SOMAXCONN) < 0) {
227 if (debug_level == 0) {
228 syslog(LOG_ERR, "Can't listen on local gssd socket");
231 err(1, "Can't listen on local gssd socket");
233 xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
235 if (debug_level == 0) {
237 "Can't create transport for local gssd socket");
240 err(1, "Can't create transport for local gssd socket");
242 if (!svc_reg(xprt, GSSD, GSSDVERS, gssd_1, NULL)) {
243 if (debug_level == 0) {
245 "Can't register service for local gssd socket");
248 err(1, "Can't register service for local gssd socket");
251 LIST_INIT(&gss_resources);
253 gss_start_time = time(0);
255 gssd_syscall(_PATH_GSSDSOCK);
268 char *name, *oid, *lib, *kobj;
270 fp = fopen(_PATH_GSS_MECH, "r");
274 while (fgets(buf, sizeof(buf), fp)) {
278 name = strsep(&p, "\t\n ");
279 if (p) while (isspace(*p)) p++;
280 oid = strsep(&p, "\t\n ");
281 if (p) while (isspace(*p)) p++;
282 lib = strsep(&p, "\t\n ");
283 if (p) while (isspace(*p)) p++;
284 kobj = strsep(&p, "\t\n ");
285 if (!name || !oid || !lib || !kobj)
288 if (strcmp(kobj, "-")) {
290 * Attempt to load the kernel module if its
291 * not already present.
293 if (modfind(kobj) < 0) {
294 if (kldload(kobj) < 0) {
296 "%s: can't find or load kernel module %s for %s\n",
297 getprogname(), kobj, name);
306 gssd_find_resource(uint64_t id)
308 struct gss_resource *gr;
313 LIST_FOREACH(gr, &gss_resources, gr_link)
321 gssd_make_resource(void *res)
323 struct gss_resource *gr;
328 gr = malloc(sizeof(struct gss_resource));
331 gr->gr_id = (gss_next_id++) + ((uint64_t) gss_start_time << 32);
333 LIST_INSERT_HEAD(&gss_resources, gr, gr_link);
334 gss_resource_count++;
336 printf("%d resources allocated\n", gss_resource_count);
342 gssd_delete_resource(uint64_t id)
344 struct gss_resource *gr;
346 LIST_FOREACH(gr, &gss_resources, gr_link) {
347 if (gr->gr_id == id) {
348 LIST_REMOVE(gr, gr_link);
350 gss_resource_count--;
352 printf("%d resources allocated\n",
360 gssd_verbose_out(const char *fmt, ...)
366 if (debug_level == 0)
367 vsyslog(LOG_INFO | LOG_DAEMON, fmt, ap);
369 vfprintf(stderr, fmt, ap);
375 gssd_null_1_svc(void *argp, void *result, struct svc_req *rqstp)
378 gssd_verbose_out("gssd_null: done\n");
383 gssd_init_sec_context_1_svc(init_sec_context_args *argp, init_sec_context_res *result, struct svc_req *rqstp)
385 gss_cred_id_t cred = GSS_C_NO_CREDENTIAL;
386 gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
387 gss_name_t name = GSS_C_NO_NAME;
388 char ccname[PATH_MAX + 5 + 1], *cp, *cp2;
391 #ifndef WITHOUT_KERBEROS
392 gss_buffer_desc principal_desc;
393 char enctype[sizeof(uint32_t)];
398 memset(result, 0, sizeof(*result));
399 if (hostbased_initiator_cred != 0 && argp->cred != 0 &&
402 * These credentials are for a host based initiator name
403 * in a keytab file, which should now have credentials
404 * in /tmp/krb5cc_gssd, because gss_acquire_cred() did
405 * the equivalent of "kinit -k".
407 snprintf(ccname, sizeof(ccname), "FILE:%s",
408 GSSD_CREDENTIAL_CACHE_FILE);
409 } else if (ccfile_dirlist[0] != '\0' && argp->cred == 0) {
411 * For the "-s" case and no credentials provided as an
412 * argument, search the directory list for an appropriate
413 * credential cache file. If the search fails, return failure.
418 cp2 = strchr(cp, ':');
421 gotone = find_ccache_file(cp, argp->uid, ccname);
427 } while (cp != NULL && *cp != '\0');
429 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
430 gssd_verbose_out("gssd_init_sec_context: -s no"
431 " credential cache file found for uid=%d\n",
437 * If there wasn't a "-s" option or the credentials have
438 * been provided as an argument, do it the old way.
439 * When credentials are provided, the uid should be root.
441 if (argp->cred != 0 && argp->uid != 0) {
442 if (debug_level == 0)
443 syslog(LOG_ERR, "gss_init_sec_context:"
444 " cred for non-root");
446 fprintf(stderr, "gss_init_sec_context:"
447 " cred for non-root\n");
449 snprintf(ccname, sizeof(ccname), "FILE:/tmp/krb5cc_%d",
452 setenv("KRB5CCNAME", ccname, TRUE);
455 cred = gssd_find_resource(argp->cred);
457 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
458 gssd_verbose_out("gssd_init_sec_context: cred"
459 " resource not found\n");
464 ctx = gssd_find_resource(argp->ctx);
466 result->major_status = GSS_S_CONTEXT_EXPIRED;
467 gssd_verbose_out("gssd_init_sec_context: context"
468 " resource not found\n");
473 name = gssd_find_resource(argp->name);
475 result->major_status = GSS_S_BAD_NAME;
476 gssd_verbose_out("gssd_init_sec_context: name"
477 " resource not found\n");
483 #ifndef WITHOUT_KERBEROS
484 if (use_old_des != 0) {
485 if (cred == GSS_C_NO_CREDENTIAL) {
486 /* Acquire a credential for the uid. */
487 maj_stat = gssd_get_user_cred(&min_stat, argp->uid,
489 if (maj_stat == GSS_S_COMPLETE)
492 gssd_verbose_out("gssd_init_sec_context: "
493 "get user cred failed uid=%d major=0x%x "
494 "minor=%d\n", (int)argp->uid,
495 (unsigned int)maj_stat, (int)min_stat);
497 if (cred != GSS_C_NO_CREDENTIAL) {
498 key_enctype = ETYPE_DES_CBC_CRC;
499 enctype[0] = (key_enctype >> 24) & 0xff;
500 enctype[1] = (key_enctype >> 16) & 0xff;
501 enctype[2] = (key_enctype >> 8) & 0xff;
502 enctype[3] = key_enctype & 0xff;
503 principal_desc.length = sizeof(enctype);
504 principal_desc.value = enctype;
505 result->major_status = gss_set_cred_option(
506 &result->minor_status, &cred,
507 GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X,
509 gssd_verbose_out("gssd_init_sec_context: set allowable "
510 "enctype major=0x%x minor=%d\n",
511 (unsigned int)result->major_status,
512 (int)result->minor_status);
513 if (result->major_status != GSS_S_COMPLETE) {
515 gss_release_cred(&min_stat, &cred);
521 result->major_status = gss_init_sec_context(&result->minor_status,
522 cred, &ctx, name, argp->mech_type,
523 argp->req_flags, argp->time_req, argp->input_chan_bindings,
524 &argp->input_token, &result->actual_mech_type,
525 &result->output_token, &result->ret_flags, &result->time_rec);
526 gssd_verbose_out("gssd_init_sec_context: done major=0x%x minor=%d"
527 " uid=%d\n", (unsigned int)result->major_status,
528 (int)result->minor_status, (int)argp->uid);
530 gss_release_cred(&min_stat, &cred);
532 if (result->major_status == GSS_S_COMPLETE
533 || result->major_status == GSS_S_CONTINUE_NEEDED) {
535 result->ctx = argp->ctx;
537 result->ctx = gssd_make_resource(ctx);
544 gssd_accept_sec_context_1_svc(accept_sec_context_args *argp, accept_sec_context_res *result, struct svc_req *rqstp)
546 gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
547 gss_cred_id_t cred = GSS_C_NO_CREDENTIAL;
549 gss_cred_id_t delegated_cred_handle;
551 memset(result, 0, sizeof(*result));
553 ctx = gssd_find_resource(argp->ctx);
555 result->major_status = GSS_S_CONTEXT_EXPIRED;
556 gssd_verbose_out("gssd_accept_sec_context: ctx"
557 " resource not found\n");
562 cred = gssd_find_resource(argp->cred);
564 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
565 gssd_verbose_out("gssd_accept_sec_context: cred"
566 " resource not found\n");
571 memset(result, 0, sizeof(*result));
572 result->major_status = gss_accept_sec_context(&result->minor_status,
573 &ctx, cred, &argp->input_token, argp->input_chan_bindings,
574 &src_name, &result->mech_type, &result->output_token,
575 &result->ret_flags, &result->time_rec,
576 &delegated_cred_handle);
577 gssd_verbose_out("gssd_accept_sec_context: done major=0x%x minor=%d\n",
578 (unsigned int)result->major_status, (int)result->minor_status);
580 if (result->major_status == GSS_S_COMPLETE
581 || result->major_status == GSS_S_CONTINUE_NEEDED) {
583 result->ctx = argp->ctx;
585 result->ctx = gssd_make_resource(ctx);
586 result->src_name = gssd_make_resource(src_name);
587 result->delegated_cred_handle =
588 gssd_make_resource(delegated_cred_handle);
595 gssd_delete_sec_context_1_svc(delete_sec_context_args *argp, delete_sec_context_res *result, struct svc_req *rqstp)
597 gss_ctx_id_t ctx = gssd_find_resource(argp->ctx);
600 result->major_status = gss_delete_sec_context(
601 &result->minor_status, &ctx, &result->output_token);
602 gssd_delete_resource(argp->ctx);
604 result->major_status = GSS_S_COMPLETE;
605 result->minor_status = 0;
607 gssd_verbose_out("gssd_delete_sec_context: done major=0x%x minor=%d\n",
608 (unsigned int)result->major_status, (int)result->minor_status);
614 gssd_export_sec_context_1_svc(export_sec_context_args *argp, export_sec_context_res *result, struct svc_req *rqstp)
616 gss_ctx_id_t ctx = gssd_find_resource(argp->ctx);
619 result->major_status = gss_export_sec_context(
620 &result->minor_status, &ctx,
621 &result->interprocess_token);
622 result->format = KGSS_HEIMDAL_1_1;
623 gssd_delete_resource(argp->ctx);
625 result->major_status = GSS_S_FAILURE;
626 result->minor_status = 0;
627 result->interprocess_token.length = 0;
628 result->interprocess_token.value = NULL;
630 gssd_verbose_out("gssd_export_sec_context: done major=0x%x minor=%d\n",
631 (unsigned int)result->major_status, (int)result->minor_status);
637 gssd_import_name_1_svc(import_name_args *argp, import_name_res *result, struct svc_req *rqstp)
641 result->major_status = gss_import_name(&result->minor_status,
642 &argp->input_name_buffer, argp->input_name_type, &name);
643 gssd_verbose_out("gssd_import_name: done major=0x%x minor=%d\n",
644 (unsigned int)result->major_status, (int)result->minor_status);
646 if (result->major_status == GSS_S_COMPLETE)
647 result->output_name = gssd_make_resource(name);
649 result->output_name = 0;
655 gssd_canonicalize_name_1_svc(canonicalize_name_args *argp, canonicalize_name_res *result, struct svc_req *rqstp)
657 gss_name_t name = gssd_find_resource(argp->input_name);
658 gss_name_t output_name;
660 memset(result, 0, sizeof(*result));
662 result->major_status = GSS_S_BAD_NAME;
666 result->major_status = gss_canonicalize_name(&result->minor_status,
667 name, argp->mech_type, &output_name);
668 gssd_verbose_out("gssd_canonicalize_name: done major=0x%x minor=%d\n",
669 (unsigned int)result->major_status, (int)result->minor_status);
671 if (result->major_status == GSS_S_COMPLETE)
672 result->output_name = gssd_make_resource(output_name);
674 result->output_name = 0;
680 gssd_export_name_1_svc(export_name_args *argp, export_name_res *result, struct svc_req *rqstp)
682 gss_name_t name = gssd_find_resource(argp->input_name);
684 memset(result, 0, sizeof(*result));
686 result->major_status = GSS_S_BAD_NAME;
687 gssd_verbose_out("gssd_export_name: name resource not found\n");
691 result->major_status = gss_export_name(&result->minor_status,
692 name, &result->exported_name);
693 gssd_verbose_out("gssd_export_name: done major=0x%x minor=%d\n",
694 (unsigned int)result->major_status, (int)result->minor_status);
700 gssd_release_name_1_svc(release_name_args *argp, release_name_res *result, struct svc_req *rqstp)
702 gss_name_t name = gssd_find_resource(argp->input_name);
705 result->major_status = gss_release_name(&result->minor_status,
707 gssd_delete_resource(argp->input_name);
709 result->major_status = GSS_S_COMPLETE;
710 result->minor_status = 0;
712 gssd_verbose_out("gssd_release_name: done major=0x%x minor=%d\n",
713 (unsigned int)result->major_status, (int)result->minor_status);
719 gssd_pname_to_uid_1_svc(pname_to_uid_args *argp, pname_to_uid_res *result, struct svc_req *rqstp)
721 gss_name_t name = gssd_find_resource(argp->pname);
723 char buf[1024], *bufp;
724 struct passwd pwd, *pw;
727 static size_t buflen_hint = 1024;
729 memset(result, 0, sizeof(*result));
731 result->major_status =
732 gss_pname_to_uid(&result->minor_status,
733 name, argp->mech, &uid);
734 if (result->major_status == GSS_S_COMPLETE) {
736 buflen = buflen_hint;
740 if (buflen > sizeof(buf))
741 bufp = malloc(buflen);
744 error = getpwuid_r(uid, &pwd, bufp, buflen,
748 if (buflen > sizeof(buf))
751 if (buflen > buflen_hint)
752 buflen_hint = buflen;
757 result->gid = pw->pw_gid;
758 getgrouplist(pw->pw_name, pw->pw_gid,
760 result->gidlist.gidlist_len = len;
761 result->gidlist.gidlist_val =
762 mem_alloc(len * sizeof(int));
763 memcpy(result->gidlist.gidlist_val, groups,
765 gssd_verbose_out("gssd_pname_to_uid: mapped"
766 " to uid=%d, gid=%d\n", (int)result->uid,
770 result->gidlist.gidlist_len = 0;
771 result->gidlist.gidlist_val = NULL;
772 gssd_verbose_out("gssd_pname_to_uid: mapped"
773 " to uid=%d, but no groups\n",
776 if (bufp != NULL && buflen > sizeof(buf))
779 gssd_verbose_out("gssd_pname_to_uid: failed major=0x%x"
780 " minor=%d\n", (unsigned int)result->major_status,
781 (int)result->minor_status);
783 result->major_status = GSS_S_BAD_NAME;
784 result->minor_status = 0;
785 gssd_verbose_out("gssd_pname_to_uid: no name\n");
792 gssd_acquire_cred_1_svc(acquire_cred_args *argp, acquire_cred_res *result, struct svc_req *rqstp)
794 gss_name_t desired_name = GSS_C_NO_NAME;
796 char ccname[PATH_MAX + 5 + 1], *cp, *cp2;
798 #ifndef WITHOUT_KERBEROS
799 gss_buffer_desc namebuf;
801 krb5_error_code kret;
804 memset(result, 0, sizeof(*result));
805 if (argp->desired_name) {
806 desired_name = gssd_find_resource(argp->desired_name);
808 result->major_status = GSS_S_BAD_NAME;
809 gssd_verbose_out("gssd_acquire_cred: no desired name"
815 #ifndef WITHOUT_KERBEROS
816 if (hostbased_initiator_cred != 0 && argp->desired_name != 0 &&
817 argp->uid == 0 && argp->cred_usage == GSS_C_INITIATE) {
818 /* This is a host based initiator name in the keytab file. */
819 snprintf(ccname, sizeof(ccname), "FILE:%s",
820 GSSD_CREDENTIAL_CACHE_FILE);
821 setenv("KRB5CCNAME", ccname, TRUE);
822 result->major_status = gss_display_name(&result->minor_status,
823 desired_name, &namebuf, NULL);
824 gssd_verbose_out("gssd_acquire_cred: desired name for host "
825 "based initiator cred major=0x%x minor=%d\n",
826 (unsigned int)result->major_status,
827 (int)result->minor_status);
828 if (result->major_status != GSS_S_COMPLETE)
830 if (namebuf.length > PATH_MAX + 5) {
831 result->minor_status = 0;
832 result->major_status = GSS_S_FAILURE;
835 memcpy(ccname, namebuf.value, namebuf.length);
836 ccname[namebuf.length] = '\0';
837 if ((cp = strchr(ccname, '@')) != NULL)
839 kret = gssd_get_cc_from_keytab(ccname);
840 gssd_verbose_out("gssd_acquire_cred: using keytab entry for "
841 "%s, kerberos ret=%d\n", ccname, (int)kret);
842 gss_release_buffer(&minstat, &namebuf);
844 result->minor_status = kret;
845 result->major_status = GSS_S_FAILURE;
849 #endif /* !WITHOUT_KERBEROS */
850 if (ccfile_dirlist[0] != '\0' && argp->desired_name == 0) {
852 * For the "-s" case and no name provided as an
853 * argument, search the directory list for an appropriate
854 * credential cache file. If the search fails, return failure.
859 cp2 = strchr(cp, ':');
862 gotone = find_ccache_file(cp, argp->uid, ccname);
868 } while (cp != NULL && *cp != '\0');
870 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
871 gssd_verbose_out("gssd_acquire_cred: no cred cache"
875 setenv("KRB5CCNAME", ccname, TRUE);
878 * If there wasn't a "-s" option or the name has
879 * been provided as an argument, do it the old way.
880 * When a name is provided, it will normally exist in the
881 * default keytab file and the uid will be root.
883 if (argp->desired_name != 0 && argp->uid != 0) {
884 if (debug_level == 0)
885 syslog(LOG_ERR, "gss_acquire_cred:"
886 " principal_name for non-root");
888 fprintf(stderr, "gss_acquire_cred:"
889 " principal_name for non-root\n");
891 snprintf(ccname, sizeof(ccname), "FILE:/tmp/krb5cc_%d",
893 setenv("KRB5CCNAME", ccname, TRUE);
896 result->major_status = gss_acquire_cred(&result->minor_status,
897 desired_name, argp->time_req, argp->desired_mechs,
898 argp->cred_usage, &cred, &result->actual_mechs, &result->time_rec);
899 gssd_verbose_out("gssd_acquire_cred: done major=0x%x minor=%d\n",
900 (unsigned int)result->major_status, (int)result->minor_status);
902 if (result->major_status == GSS_S_COMPLETE)
903 result->output_cred = gssd_make_resource(cred);
905 result->output_cred = 0;
911 gssd_set_cred_option_1_svc(set_cred_option_args *argp, set_cred_option_res *result, struct svc_req *rqstp)
913 gss_cred_id_t cred = gssd_find_resource(argp->cred);
915 memset(result, 0, sizeof(*result));
917 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
918 gssd_verbose_out("gssd_set_cred: no credentials\n");
922 result->major_status = gss_set_cred_option(&result->minor_status,
923 &cred, argp->option_name, &argp->option_value);
924 gssd_verbose_out("gssd_set_cred: done major=0x%x minor=%d\n",
925 (unsigned int)result->major_status, (int)result->minor_status);
931 gssd_release_cred_1_svc(release_cred_args *argp, release_cred_res *result, struct svc_req *rqstp)
933 gss_cred_id_t cred = gssd_find_resource(argp->cred);
936 result->major_status = gss_release_cred(&result->minor_status,
938 gssd_delete_resource(argp->cred);
940 result->major_status = GSS_S_COMPLETE;
941 result->minor_status = 0;
943 gssd_verbose_out("gssd_release_cred: done major=0x%x minor=%d\n",
944 (unsigned int)result->major_status, (int)result->minor_status);
950 gssd_display_status_1_svc(display_status_args *argp, display_status_res *result, struct svc_req *rqstp)
953 result->message_context = argp->message_context;
954 result->major_status = gss_display_status(&result->minor_status,
955 argp->status_value, argp->status_type, argp->mech_type,
956 &result->message_context, &result->status_string);
957 gssd_verbose_out("gssd_display_status: done major=0x%x minor=%d\n",
958 (unsigned int)result->major_status, (int)result->minor_status);
964 gssd_1_freeresult(SVCXPRT *transp, xdrproc_t xdr_result, caddr_t result)
967 * We don't use XDR to free the results - anything which was
968 * allocated came from GSS-API. We use xdr_result to figure
973 if (xdr_result == (xdrproc_t) xdr_init_sec_context_res) {
974 init_sec_context_res *p = (init_sec_context_res *) result;
975 gss_release_buffer(&junk, &p->output_token);
976 } else if (xdr_result == (xdrproc_t) xdr_accept_sec_context_res) {
977 accept_sec_context_res *p = (accept_sec_context_res *) result;
978 gss_release_buffer(&junk, &p->output_token);
979 } else if (xdr_result == (xdrproc_t) xdr_delete_sec_context_res) {
980 delete_sec_context_res *p = (delete_sec_context_res *) result;
981 gss_release_buffer(&junk, &p->output_token);
982 } else if (xdr_result == (xdrproc_t) xdr_export_sec_context_res) {
983 export_sec_context_res *p = (export_sec_context_res *) result;
984 if (p->interprocess_token.length)
985 memset(p->interprocess_token.value, 0,
986 p->interprocess_token.length);
987 gss_release_buffer(&junk, &p->interprocess_token);
988 } else if (xdr_result == (xdrproc_t) xdr_export_name_res) {
989 export_name_res *p = (export_name_res *) result;
990 gss_release_buffer(&junk, &p->exported_name);
991 } else if (xdr_result == (xdrproc_t) xdr_acquire_cred_res) {
992 acquire_cred_res *p = (acquire_cred_res *) result;
993 gss_release_oid_set(&junk, &p->actual_mechs);
994 } else if (xdr_result == (xdrproc_t) xdr_pname_to_uid_res) {
995 pname_to_uid_res *p = (pname_to_uid_res *) result;
996 if (p->gidlist.gidlist_val)
997 free(p->gidlist.gidlist_val);
998 } else if (xdr_result == (xdrproc_t) xdr_display_status_res) {
999 display_status_res *p = (display_status_res *) result;
1000 gss_release_buffer(&junk, &p->status_string);
1007 * Search a directory for the most likely candidate to be used as the
1008 * credential cache for a uid. If successful, return 1 and fill the
1009 * file's path id into "rpath". Otherwise, return 0.
1012 find_ccache_file(const char *dirpath, uid_t uid, char *rpath)
1017 time_t exptime, oexptime;
1018 int gotone, len, rating, orating;
1019 char namepath[PATH_MAX + 5 + 1];
1020 char retpath[PATH_MAX + 5 + 1];
1022 dirp = opendir(dirpath);
1028 while ((dp = readdir(dirp)) != NULL) {
1029 len = snprintf(namepath, sizeof(namepath), "%s/%s", dirpath,
1031 if (len < sizeof(namepath) &&
1032 (hostbased_initiator_cred == 0 || strcmp(namepath,
1033 GSSD_CREDENTIAL_CACHE_FILE) != 0) &&
1034 strstr(dp->d_name, ccfile_substring) != NULL &&
1035 lstat(namepath, &sb) >= 0 &&
1037 S_ISREG(sb.st_mode)) {
1038 len = snprintf(namepath, sizeof(namepath), "FILE:%s/%s",
1039 dirpath, dp->d_name);
1040 if (len < sizeof(namepath) &&
1041 is_a_valid_tgt_cache(namepath, uid, &rating,
1043 if (gotone == 0 || rating > orating ||
1044 (rating == orating && exptime > oexptime)) {
1047 strcpy(retpath, namepath);
1055 strcpy(rpath, retpath);
1062 * Try to determine if the file is a valid tgt cache file.
1063 * Check that the file has a valid tgt for a principal.
1064 * If it does, return 1, otherwise return 0.
1065 * It also returns a "rating" and the expiry time for the TGT, when found.
1066 * This "rating" is higher based on heuristics that make it more
1067 * likely to be the correct credential cache file to use. It can
1068 * be used by the caller, along with expiry time, to select from
1069 * multiple credential cache files.
1072 is_a_valid_tgt_cache(const char *filepath, uid_t uid, int *retrating,
1075 #ifndef WITHOUT_KERBEROS
1076 krb5_context context;
1077 krb5_principal princ;
1079 krb5_error_code retval;
1080 krb5_cc_cursor curse;
1082 int gotone, orating, rating, ret;
1084 char *cp, *cp2, *pname;
1087 /* Find a likely name for the uid principal. */
1091 * Do a bunch of krb5 library stuff to try and determine if
1092 * this file is a credentials cache with an appropriate TGT
1095 retval = krb5_init_context(&context);
1098 retval = krb5_cc_resolve(context, filepath, &ccache);
1100 krb5_free_context(context);
1106 retval = krb5_cc_start_seq_get(context, ccache, &curse);
1108 while ((retval = krb5_cc_next_cred(context, ccache, &curse,
1112 retval = krb5_unparse_name(context, krbcred.server,
1115 cp = strchr(pname, '/');
1118 if (strcmp(pname, "krbtgt") == 0 &&
1119 krbcred.times.endtime > time(NULL)
1123 * Test to see if this is a
1124 * tgt for cross-realm auth.
1125 * Rate it higher, if it is not.
1127 cp2 = strchr(cp, '@');
1130 if (strcmp(cp, cp2) ==
1139 retval = krb5_unparse_name(context,
1140 krbcred.client, &pname);
1142 cp = strchr(pname, '@');
1145 if (pw != NULL && strcmp(pname,
1148 if (strchr(pname, '/') == NULL)
1150 if (pref_realm[0] != '\0' &&
1151 strcmp(cp, pref_realm) == 0)
1156 if (rating > orating) {
1158 exptime = krbcred.times.endtime;
1159 } else if (rating == orating &&
1160 krbcred.times.endtime > exptime)
1161 exptime = krbcred.times.endtime;
1164 krb5_free_cred_contents(context, &krbcred);
1166 krb5_cc_end_seq_get(context, ccache, &curse);
1168 krb5_cc_close(context, ccache);
1169 krb5_free_context(context);
1171 *retrating = orating;
1172 *retexptime = exptime;
1175 #else /* WITHOUT_KERBEROS */
1177 #endif /* !WITHOUT_KERBEROS */
1180 #ifndef WITHOUT_KERBEROS
1182 * This function attempts to do essentially a "kinit -k" for the principal
1183 * name provided as the argument, so that there will be a TGT in the
1186 static krb5_error_code
1187 gssd_get_cc_from_keytab(const char *name)
1189 krb5_error_code ret, opt_ret, princ_ret, cc_ret, kt_ret, cred_ret;
1190 krb5_context context;
1191 krb5_principal principal;
1194 krb5_get_init_creds_opt *opt;
1195 krb5_deltat start_time = 0;
1198 ret = krb5_init_context(&context);
1201 opt_ret = cc_ret = kt_ret = cred_ret = 1; /* anything non-zero */
1202 princ_ret = ret = krb5_parse_name(context, name, &principal);
1204 opt_ret = ret = krb5_get_init_creds_opt_alloc(context, &opt);
1206 cc_ret = ret = krb5_cc_default(context, &ccache);
1208 ret = krb5_cc_initialize(context, ccache, principal);
1210 krb5_get_init_creds_opt_set_default_flags(context, "gssd",
1211 krb5_principal_get_realm(context, principal), opt);
1212 kt_ret = ret = krb5_kt_default(context, &kt);
1215 cred_ret = ret = krb5_get_init_creds_keytab(context, &cred,
1216 principal, kt, start_time, NULL, opt);
1218 ret = krb5_cc_store_cred(context, ccache, &cred);
1220 krb5_kt_close(context, kt);
1222 krb5_cc_close(context, ccache);
1224 krb5_get_init_creds_opt_free(context, opt);
1226 krb5_free_principal(context, principal);
1228 krb5_free_cred_contents(context, &cred);
1229 krb5_free_context(context);
1234 * Acquire a gss credential for a uid.
1237 gssd_get_user_cred(OM_uint32 *min_statp, uid_t uid, gss_cred_id_t *credp)
1239 gss_buffer_desc principal_desc;
1241 OM_uint32 maj_stat, min_stat;
1242 gss_OID_set mechlist;
1248 return (GSS_S_FAILURE);
1252 * The mechanism must be set to KerberosV for acquisition
1253 * of credentials to work reliably.
1255 maj_stat = gss_create_empty_oid_set(min_statp, &mechlist);
1256 if (maj_stat != GSS_S_COMPLETE)
1258 maj_stat = gss_add_oid_set_member(min_statp, GSS_KRB5_MECH_OID_X,
1260 if (maj_stat != GSS_S_COMPLETE) {
1261 gss_release_oid_set(&min_stat, &mechlist);
1265 principal_desc.value = (void *)pw->pw_name;
1266 principal_desc.length = strlen(pw->pw_name);
1267 maj_stat = gss_import_name(min_statp, &principal_desc,
1268 GSS_C_NT_USER_NAME, &name);
1269 if (maj_stat != GSS_S_COMPLETE) {
1270 gss_release_oid_set(&min_stat, &mechlist);
1273 /* Acquire the credentials. */
1274 maj_stat = gss_acquire_cred(min_statp, name, 0, mechlist,
1275 GSS_C_INITIATE, credp, NULL, NULL);
1276 gss_release_name(&min_stat, &name);
1277 gss_release_oid_set(&min_stat, &mechlist);
1280 #endif /* !WITHOUT_KERBEROS */
1282 void gssd_terminate(int sig __unused)
1285 #ifndef WITHOUT_KERBEROS
1286 if (hostbased_initiator_cred != 0)
1287 unlink(GSSD_CREDENTIAL_CACHE_FILE);