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]);
197 signal(SIGINT, SIG_IGN);
198 signal(SIGQUIT, SIG_IGN);
199 signal(SIGHUP, SIG_IGN);
201 signal(SIGTERM, gssd_terminate);
203 memset(&sun, 0, sizeof sun);
204 sun.sun_family = AF_LOCAL;
205 unlink(_PATH_GSSDSOCK);
206 strcpy(sun.sun_path, _PATH_GSSDSOCK);
207 sun.sun_len = SUN_LEN(&sun);
208 fd = socket(AF_LOCAL, SOCK_STREAM, 0);
210 if (debug_level == 0) {
211 syslog(LOG_ERR, "Can't create local gssd socket");
214 err(1, "Can't create local gssd socket");
216 oldmask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
217 if (bind(fd, (struct sockaddr *) &sun, sun.sun_len) < 0) {
218 if (debug_level == 0) {
219 syslog(LOG_ERR, "Can't bind local gssd socket");
222 err(1, "Can't bind local gssd socket");
225 if (listen(fd, SOMAXCONN) < 0) {
226 if (debug_level == 0) {
227 syslog(LOG_ERR, "Can't listen on local gssd socket");
230 err(1, "Can't listen on local gssd socket");
232 xprt = svc_vc_create(fd, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
234 if (debug_level == 0) {
236 "Can't create transport for local gssd socket");
239 err(1, "Can't create transport for local gssd socket");
241 if (!svc_reg(xprt, GSSD, GSSDVERS, gssd_1, NULL)) {
242 if (debug_level == 0) {
244 "Can't register service for local gssd socket");
247 err(1, "Can't register service for local gssd socket");
250 LIST_INIT(&gss_resources);
252 gss_start_time = time(0);
254 gssd_syscall(_PATH_GSSDSOCK);
266 char *name, *oid, *lib, *kobj;
268 fp = fopen(_PATH_GSS_MECH, "r");
272 while (fgets(buf, sizeof(buf), fp)) {
276 name = strsep(&p, "\t\n ");
277 if (p) while (isspace(*p)) p++;
278 oid = strsep(&p, "\t\n ");
279 if (p) while (isspace(*p)) p++;
280 lib = strsep(&p, "\t\n ");
281 if (p) while (isspace(*p)) p++;
282 kobj = strsep(&p, "\t\n ");
283 if (!name || !oid || !lib || !kobj)
286 if (strcmp(kobj, "-")) {
288 * Attempt to load the kernel module if its
289 * not already present.
291 if (modfind(kobj) < 0) {
292 if (kldload(kobj) < 0) {
294 "%s: can't find or load kernel module %s for %s\n",
295 getprogname(), kobj, name);
304 gssd_find_resource(uint64_t id)
306 struct gss_resource *gr;
311 LIST_FOREACH(gr, &gss_resources, gr_link)
319 gssd_make_resource(void *res)
321 struct gss_resource *gr;
326 gr = malloc(sizeof(struct gss_resource));
329 gr->gr_id = (gss_next_id++) + ((uint64_t) gss_start_time << 32);
331 LIST_INSERT_HEAD(&gss_resources, gr, gr_link);
332 gss_resource_count++;
334 printf("%d resources allocated\n", gss_resource_count);
340 gssd_delete_resource(uint64_t id)
342 struct gss_resource *gr;
344 LIST_FOREACH(gr, &gss_resources, gr_link) {
345 if (gr->gr_id == id) {
346 LIST_REMOVE(gr, gr_link);
348 gss_resource_count--;
350 printf("%d resources allocated\n",
358 gssd_verbose_out(const char *fmt, ...)
364 if (debug_level == 0)
365 vsyslog(LOG_INFO | LOG_DAEMON, fmt, ap);
367 vfprintf(stderr, fmt, ap);
373 gssd_null_1_svc(void *argp, void *result, struct svc_req *rqstp)
376 gssd_verbose_out("gssd_null: done\n");
381 gssd_init_sec_context_1_svc(init_sec_context_args *argp, init_sec_context_res *result, struct svc_req *rqstp)
383 gss_cred_id_t cred = GSS_C_NO_CREDENTIAL;
384 gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
385 gss_name_t name = GSS_C_NO_NAME;
386 char ccname[PATH_MAX + 5 + 1], *cp, *cp2;
389 #ifndef WITHOUT_KERBEROS
390 gss_buffer_desc principal_desc;
391 char enctype[sizeof(uint32_t)];
396 memset(result, 0, sizeof(*result));
397 if (hostbased_initiator_cred != 0 && argp->cred != 0 &&
400 * These credentials are for a host based initiator name
401 * in a keytab file, which should now have credentials
402 * in /tmp/krb5cc_gssd, because gss_acquire_cred() did
403 * the equivalent of "kinit -k".
405 snprintf(ccname, sizeof(ccname), "FILE:%s",
406 GSSD_CREDENTIAL_CACHE_FILE);
407 } else if (ccfile_dirlist[0] != '\0' && argp->cred == 0) {
409 * For the "-s" case and no credentials provided as an
410 * argument, search the directory list for an appropriate
411 * credential cache file. If the search fails, return failure.
416 cp2 = strchr(cp, ':');
419 gotone = find_ccache_file(cp, argp->uid, ccname);
425 } while (cp != NULL && *cp != '\0');
427 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
428 gssd_verbose_out("gssd_init_sec_context: -s no"
429 " credential cache file found for uid=%d\n",
435 * If there wasn't a "-s" option or the credentials have
436 * been provided as an argument, do it the old way.
437 * When credentials are provided, the uid should be root.
439 if (argp->cred != 0 && argp->uid != 0) {
440 if (debug_level == 0)
441 syslog(LOG_ERR, "gss_init_sec_context:"
442 " cred for non-root");
444 fprintf(stderr, "gss_init_sec_context:"
445 " cred for non-root\n");
447 snprintf(ccname, sizeof(ccname), "FILE:/tmp/krb5cc_%d",
450 setenv("KRB5CCNAME", ccname, TRUE);
453 cred = gssd_find_resource(argp->cred);
455 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
456 gssd_verbose_out("gssd_init_sec_context: cred"
457 " resource not found\n");
462 ctx = gssd_find_resource(argp->ctx);
464 result->major_status = GSS_S_CONTEXT_EXPIRED;
465 gssd_verbose_out("gssd_init_sec_context: context"
466 " resource not found\n");
471 name = gssd_find_resource(argp->name);
473 result->major_status = GSS_S_BAD_NAME;
474 gssd_verbose_out("gssd_init_sec_context: name"
475 " resource not found\n");
481 #ifndef WITHOUT_KERBEROS
482 if (use_old_des != 0) {
483 if (cred == GSS_C_NO_CREDENTIAL) {
484 /* Acquire a credential for the uid. */
485 maj_stat = gssd_get_user_cred(&min_stat, argp->uid,
487 if (maj_stat == GSS_S_COMPLETE)
490 gssd_verbose_out("gssd_init_sec_context: "
491 "get user cred failed uid=%d major=0x%x "
492 "minor=%d\n", (int)argp->uid,
493 (unsigned int)maj_stat, (int)min_stat);
495 if (cred != GSS_C_NO_CREDENTIAL) {
496 key_enctype = ETYPE_DES_CBC_CRC;
497 enctype[0] = (key_enctype >> 24) & 0xff;
498 enctype[1] = (key_enctype >> 16) & 0xff;
499 enctype[2] = (key_enctype >> 8) & 0xff;
500 enctype[3] = key_enctype & 0xff;
501 principal_desc.length = sizeof(enctype);
502 principal_desc.value = enctype;
503 result->major_status = gss_set_cred_option(
504 &result->minor_status, &cred,
505 GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X,
507 gssd_verbose_out("gssd_init_sec_context: set allowable "
508 "enctype major=0x%x minor=%d\n",
509 (unsigned int)result->major_status,
510 (int)result->minor_status);
511 if (result->major_status != GSS_S_COMPLETE) {
513 gss_release_cred(&min_stat, &cred);
519 result->major_status = gss_init_sec_context(&result->minor_status,
520 cred, &ctx, name, argp->mech_type,
521 argp->req_flags, argp->time_req, argp->input_chan_bindings,
522 &argp->input_token, &result->actual_mech_type,
523 &result->output_token, &result->ret_flags, &result->time_rec);
524 gssd_verbose_out("gssd_init_sec_context: done major=0x%x minor=%d"
525 " uid=%d\n", (unsigned int)result->major_status,
526 (int)result->minor_status, (int)argp->uid);
528 gss_release_cred(&min_stat, &cred);
530 if (result->major_status == GSS_S_COMPLETE
531 || result->major_status == GSS_S_CONTINUE_NEEDED) {
533 result->ctx = argp->ctx;
535 result->ctx = gssd_make_resource(ctx);
542 gssd_accept_sec_context_1_svc(accept_sec_context_args *argp, accept_sec_context_res *result, struct svc_req *rqstp)
544 gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
545 gss_cred_id_t cred = GSS_C_NO_CREDENTIAL;
547 gss_cred_id_t delegated_cred_handle;
549 memset(result, 0, sizeof(*result));
551 ctx = gssd_find_resource(argp->ctx);
553 result->major_status = GSS_S_CONTEXT_EXPIRED;
554 gssd_verbose_out("gssd_accept_sec_context: ctx"
555 " resource not found\n");
560 cred = gssd_find_resource(argp->cred);
562 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
563 gssd_verbose_out("gssd_accept_sec_context: cred"
564 " resource not found\n");
569 memset(result, 0, sizeof(*result));
570 result->major_status = gss_accept_sec_context(&result->minor_status,
571 &ctx, cred, &argp->input_token, argp->input_chan_bindings,
572 &src_name, &result->mech_type, &result->output_token,
573 &result->ret_flags, &result->time_rec,
574 &delegated_cred_handle);
575 gssd_verbose_out("gssd_accept_sec_context: done major=0x%x minor=%d\n",
576 (unsigned int)result->major_status, (int)result->minor_status);
578 if (result->major_status == GSS_S_COMPLETE
579 || result->major_status == GSS_S_CONTINUE_NEEDED) {
581 result->ctx = argp->ctx;
583 result->ctx = gssd_make_resource(ctx);
584 result->src_name = gssd_make_resource(src_name);
585 result->delegated_cred_handle =
586 gssd_make_resource(delegated_cred_handle);
593 gssd_delete_sec_context_1_svc(delete_sec_context_args *argp, delete_sec_context_res *result, struct svc_req *rqstp)
595 gss_ctx_id_t ctx = gssd_find_resource(argp->ctx);
598 result->major_status = gss_delete_sec_context(
599 &result->minor_status, &ctx, &result->output_token);
600 gssd_delete_resource(argp->ctx);
602 result->major_status = GSS_S_COMPLETE;
603 result->minor_status = 0;
605 gssd_verbose_out("gssd_delete_sec_context: done major=0x%x minor=%d\n",
606 (unsigned int)result->major_status, (int)result->minor_status);
612 gssd_export_sec_context_1_svc(export_sec_context_args *argp, export_sec_context_res *result, struct svc_req *rqstp)
614 gss_ctx_id_t ctx = gssd_find_resource(argp->ctx);
617 result->major_status = gss_export_sec_context(
618 &result->minor_status, &ctx,
619 &result->interprocess_token);
620 result->format = KGSS_HEIMDAL_1_1;
621 gssd_delete_resource(argp->ctx);
623 result->major_status = GSS_S_FAILURE;
624 result->minor_status = 0;
625 result->interprocess_token.length = 0;
626 result->interprocess_token.value = NULL;
628 gssd_verbose_out("gssd_export_sec_context: done major=0x%x minor=%d\n",
629 (unsigned int)result->major_status, (int)result->minor_status);
635 gssd_import_name_1_svc(import_name_args *argp, import_name_res *result, struct svc_req *rqstp)
639 result->major_status = gss_import_name(&result->minor_status,
640 &argp->input_name_buffer, argp->input_name_type, &name);
641 gssd_verbose_out("gssd_import_name: done major=0x%x minor=%d\n",
642 (unsigned int)result->major_status, (int)result->minor_status);
644 if (result->major_status == GSS_S_COMPLETE)
645 result->output_name = gssd_make_resource(name);
647 result->output_name = 0;
653 gssd_canonicalize_name_1_svc(canonicalize_name_args *argp, canonicalize_name_res *result, struct svc_req *rqstp)
655 gss_name_t name = gssd_find_resource(argp->input_name);
656 gss_name_t output_name;
658 memset(result, 0, sizeof(*result));
660 result->major_status = GSS_S_BAD_NAME;
664 result->major_status = gss_canonicalize_name(&result->minor_status,
665 name, argp->mech_type, &output_name);
666 gssd_verbose_out("gssd_canonicalize_name: done major=0x%x minor=%d\n",
667 (unsigned int)result->major_status, (int)result->minor_status);
669 if (result->major_status == GSS_S_COMPLETE)
670 result->output_name = gssd_make_resource(output_name);
672 result->output_name = 0;
678 gssd_export_name_1_svc(export_name_args *argp, export_name_res *result, struct svc_req *rqstp)
680 gss_name_t name = gssd_find_resource(argp->input_name);
682 memset(result, 0, sizeof(*result));
684 result->major_status = GSS_S_BAD_NAME;
685 gssd_verbose_out("gssd_export_name: name resource not found\n");
689 result->major_status = gss_export_name(&result->minor_status,
690 name, &result->exported_name);
691 gssd_verbose_out("gssd_export_name: done major=0x%x minor=%d\n",
692 (unsigned int)result->major_status, (int)result->minor_status);
698 gssd_release_name_1_svc(release_name_args *argp, release_name_res *result, struct svc_req *rqstp)
700 gss_name_t name = gssd_find_resource(argp->input_name);
703 result->major_status = gss_release_name(&result->minor_status,
705 gssd_delete_resource(argp->input_name);
707 result->major_status = GSS_S_COMPLETE;
708 result->minor_status = 0;
710 gssd_verbose_out("gssd_release_name: done major=0x%x minor=%d\n",
711 (unsigned int)result->major_status, (int)result->minor_status);
717 gssd_pname_to_uid_1_svc(pname_to_uid_args *argp, pname_to_uid_res *result, struct svc_req *rqstp)
719 gss_name_t name = gssd_find_resource(argp->pname);
721 char buf[1024], *bufp;
722 struct passwd pwd, *pw;
725 static size_t buflen_hint = 1024;
727 memset(result, 0, sizeof(*result));
729 result->major_status =
730 gss_pname_to_uid(&result->minor_status,
731 name, argp->mech, &uid);
732 if (result->major_status == GSS_S_COMPLETE) {
734 buflen = buflen_hint;
738 if (buflen > sizeof(buf))
739 bufp = malloc(buflen);
742 error = getpwuid_r(uid, &pwd, bufp, buflen,
746 if (buflen > sizeof(buf))
749 if (buflen > buflen_hint)
750 buflen_hint = buflen;
755 result->gid = pw->pw_gid;
756 getgrouplist(pw->pw_name, pw->pw_gid,
758 result->gidlist.gidlist_len = len;
759 result->gidlist.gidlist_val =
760 mem_alloc(len * sizeof(int));
761 memcpy(result->gidlist.gidlist_val, groups,
763 gssd_verbose_out("gssd_pname_to_uid: mapped"
764 " to uid=%d, gid=%d\n", (int)result->uid,
768 result->gidlist.gidlist_len = 0;
769 result->gidlist.gidlist_val = NULL;
770 gssd_verbose_out("gssd_pname_to_uid: mapped"
771 " to uid=%d, but no groups\n",
774 if (bufp != NULL && buflen > sizeof(buf))
777 gssd_verbose_out("gssd_pname_to_uid: failed major=0x%x"
778 " minor=%d\n", (unsigned int)result->major_status,
779 (int)result->minor_status);
781 result->major_status = GSS_S_BAD_NAME;
782 result->minor_status = 0;
783 gssd_verbose_out("gssd_pname_to_uid: no name\n");
790 gssd_acquire_cred_1_svc(acquire_cred_args *argp, acquire_cred_res *result, struct svc_req *rqstp)
792 gss_name_t desired_name = GSS_C_NO_NAME;
794 char ccname[PATH_MAX + 5 + 1], *cp, *cp2;
796 #ifndef WITHOUT_KERBEROS
797 gss_buffer_desc namebuf;
799 krb5_error_code kret;
802 memset(result, 0, sizeof(*result));
803 if (argp->desired_name) {
804 desired_name = gssd_find_resource(argp->desired_name);
806 result->major_status = GSS_S_BAD_NAME;
807 gssd_verbose_out("gssd_acquire_cred: no desired name"
813 #ifndef WITHOUT_KERBEROS
814 if (hostbased_initiator_cred != 0 && argp->desired_name != 0 &&
815 argp->uid == 0 && argp->cred_usage == GSS_C_INITIATE) {
816 /* This is a host based initiator name in the keytab file. */
817 snprintf(ccname, sizeof(ccname), "FILE:%s",
818 GSSD_CREDENTIAL_CACHE_FILE);
819 setenv("KRB5CCNAME", ccname, TRUE);
820 result->major_status = gss_display_name(&result->minor_status,
821 desired_name, &namebuf, NULL);
822 gssd_verbose_out("gssd_acquire_cred: desired name for host "
823 "based initiator cred major=0x%x minor=%d\n",
824 (unsigned int)result->major_status,
825 (int)result->minor_status);
826 if (result->major_status != GSS_S_COMPLETE)
828 if (namebuf.length > PATH_MAX + 5) {
829 result->minor_status = 0;
830 result->major_status = GSS_S_FAILURE;
833 memcpy(ccname, namebuf.value, namebuf.length);
834 ccname[namebuf.length] = '\0';
835 if ((cp = strchr(ccname, '@')) != NULL)
837 kret = gssd_get_cc_from_keytab(ccname);
838 gssd_verbose_out("gssd_acquire_cred: using keytab entry for "
839 "%s, kerberos ret=%d\n", ccname, (int)kret);
840 gss_release_buffer(&minstat, &namebuf);
842 result->minor_status = kret;
843 result->major_status = GSS_S_FAILURE;
847 #endif /* !WITHOUT_KERBEROS */
848 if (ccfile_dirlist[0] != '\0' && argp->desired_name == 0) {
850 * For the "-s" case and no name provided as an
851 * argument, search the directory list for an appropriate
852 * credential cache file. If the search fails, return failure.
857 cp2 = strchr(cp, ':');
860 gotone = find_ccache_file(cp, argp->uid, ccname);
866 } while (cp != NULL && *cp != '\0');
868 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
869 gssd_verbose_out("gssd_acquire_cred: no cred cache"
873 setenv("KRB5CCNAME", ccname, TRUE);
876 * If there wasn't a "-s" option or the name has
877 * been provided as an argument, do it the old way.
878 * When a name is provided, it will normally exist in the
879 * default keytab file and the uid will be root.
881 if (argp->desired_name != 0 && argp->uid != 0) {
882 if (debug_level == 0)
883 syslog(LOG_ERR, "gss_acquire_cred:"
884 " principal_name for non-root");
886 fprintf(stderr, "gss_acquire_cred:"
887 " principal_name for non-root\n");
889 snprintf(ccname, sizeof(ccname), "FILE:/tmp/krb5cc_%d",
891 setenv("KRB5CCNAME", ccname, TRUE);
894 result->major_status = gss_acquire_cred(&result->minor_status,
895 desired_name, argp->time_req, argp->desired_mechs,
896 argp->cred_usage, &cred, &result->actual_mechs, &result->time_rec);
897 gssd_verbose_out("gssd_acquire_cred: done major=0x%x minor=%d\n",
898 (unsigned int)result->major_status, (int)result->minor_status);
900 if (result->major_status == GSS_S_COMPLETE)
901 result->output_cred = gssd_make_resource(cred);
903 result->output_cred = 0;
909 gssd_set_cred_option_1_svc(set_cred_option_args *argp, set_cred_option_res *result, struct svc_req *rqstp)
911 gss_cred_id_t cred = gssd_find_resource(argp->cred);
913 memset(result, 0, sizeof(*result));
915 result->major_status = GSS_S_CREDENTIALS_EXPIRED;
916 gssd_verbose_out("gssd_set_cred: no credentials\n");
920 result->major_status = gss_set_cred_option(&result->minor_status,
921 &cred, argp->option_name, &argp->option_value);
922 gssd_verbose_out("gssd_set_cred: done major=0x%x minor=%d\n",
923 (unsigned int)result->major_status, (int)result->minor_status);
929 gssd_release_cred_1_svc(release_cred_args *argp, release_cred_res *result, struct svc_req *rqstp)
931 gss_cred_id_t cred = gssd_find_resource(argp->cred);
934 result->major_status = gss_release_cred(&result->minor_status,
936 gssd_delete_resource(argp->cred);
938 result->major_status = GSS_S_COMPLETE;
939 result->minor_status = 0;
941 gssd_verbose_out("gssd_release_cred: done major=0x%x minor=%d\n",
942 (unsigned int)result->major_status, (int)result->minor_status);
948 gssd_display_status_1_svc(display_status_args *argp, display_status_res *result, struct svc_req *rqstp)
951 result->message_context = argp->message_context;
952 result->major_status = gss_display_status(&result->minor_status,
953 argp->status_value, argp->status_type, argp->mech_type,
954 &result->message_context, &result->status_string);
955 gssd_verbose_out("gssd_display_status: done major=0x%x minor=%d\n",
956 (unsigned int)result->major_status, (int)result->minor_status);
962 gssd_1_freeresult(SVCXPRT *transp, xdrproc_t xdr_result, caddr_t result)
965 * We don't use XDR to free the results - anything which was
966 * allocated came from GSS-API. We use xdr_result to figure
971 if (xdr_result == (xdrproc_t) xdr_init_sec_context_res) {
972 init_sec_context_res *p = (init_sec_context_res *) result;
973 gss_release_buffer(&junk, &p->output_token);
974 } else if (xdr_result == (xdrproc_t) xdr_accept_sec_context_res) {
975 accept_sec_context_res *p = (accept_sec_context_res *) result;
976 gss_release_buffer(&junk, &p->output_token);
977 } else if (xdr_result == (xdrproc_t) xdr_delete_sec_context_res) {
978 delete_sec_context_res *p = (delete_sec_context_res *) result;
979 gss_release_buffer(&junk, &p->output_token);
980 } else if (xdr_result == (xdrproc_t) xdr_export_sec_context_res) {
981 export_sec_context_res *p = (export_sec_context_res *) result;
982 if (p->interprocess_token.length)
983 memset(p->interprocess_token.value, 0,
984 p->interprocess_token.length);
985 gss_release_buffer(&junk, &p->interprocess_token);
986 } else if (xdr_result == (xdrproc_t) xdr_export_name_res) {
987 export_name_res *p = (export_name_res *) result;
988 gss_release_buffer(&junk, &p->exported_name);
989 } else if (xdr_result == (xdrproc_t) xdr_acquire_cred_res) {
990 acquire_cred_res *p = (acquire_cred_res *) result;
991 gss_release_oid_set(&junk, &p->actual_mechs);
992 } else if (xdr_result == (xdrproc_t) xdr_pname_to_uid_res) {
993 pname_to_uid_res *p = (pname_to_uid_res *) result;
994 if (p->gidlist.gidlist_val)
995 free(p->gidlist.gidlist_val);
996 } else if (xdr_result == (xdrproc_t) xdr_display_status_res) {
997 display_status_res *p = (display_status_res *) result;
998 gss_release_buffer(&junk, &p->status_string);
1005 * Search a directory for the most likely candidate to be used as the
1006 * credential cache for a uid. If successful, return 1 and fill the
1007 * file's path id into "rpath". Otherwise, return 0.
1010 find_ccache_file(const char *dirpath, uid_t uid, char *rpath)
1015 time_t exptime, oexptime;
1016 int gotone, len, rating, orating;
1017 char namepath[PATH_MAX + 5 + 1];
1018 char retpath[PATH_MAX + 5 + 1];
1020 dirp = opendir(dirpath);
1026 while ((dp = readdir(dirp)) != NULL) {
1027 len = snprintf(namepath, sizeof(namepath), "%s/%s", dirpath,
1029 if (len < sizeof(namepath) &&
1030 (hostbased_initiator_cred == 0 || strcmp(namepath,
1031 GSSD_CREDENTIAL_CACHE_FILE) != 0) &&
1032 strstr(dp->d_name, ccfile_substring) != NULL &&
1033 lstat(namepath, &sb) >= 0 &&
1035 S_ISREG(sb.st_mode)) {
1036 len = snprintf(namepath, sizeof(namepath), "FILE:%s/%s",
1037 dirpath, dp->d_name);
1038 if (len < sizeof(namepath) &&
1039 is_a_valid_tgt_cache(namepath, uid, &rating,
1041 if (gotone == 0 || rating > orating ||
1042 (rating == orating && exptime > oexptime)) {
1045 strcpy(retpath, namepath);
1053 strcpy(rpath, retpath);
1060 * Try to determine if the file is a valid tgt cache file.
1061 * Check that the file has a valid tgt for a principal.
1062 * If it does, return 1, otherwise return 0.
1063 * It also returns a "rating" and the expiry time for the TGT, when found.
1064 * This "rating" is higher based on heuristics that make it more
1065 * likely to be the correct credential cache file to use. It can
1066 * be used by the caller, along with expiry time, to select from
1067 * multiple credential cache files.
1070 is_a_valid_tgt_cache(const char *filepath, uid_t uid, int *retrating,
1073 #ifndef WITHOUT_KERBEROS
1074 krb5_context context;
1075 krb5_principal princ;
1077 krb5_error_code retval;
1078 krb5_cc_cursor curse;
1080 int gotone, orating, rating, ret;
1082 char *cp, *cp2, *pname;
1085 /* Find a likely name for the uid principal. */
1089 * Do a bunch of krb5 library stuff to try and determine if
1090 * this file is a credentials cache with an appropriate TGT
1093 retval = krb5_init_context(&context);
1096 retval = krb5_cc_resolve(context, filepath, &ccache);
1098 krb5_free_context(context);
1104 retval = krb5_cc_start_seq_get(context, ccache, &curse);
1106 while ((retval = krb5_cc_next_cred(context, ccache, &curse,
1110 retval = krb5_unparse_name(context, krbcred.server,
1113 cp = strchr(pname, '/');
1116 if (strcmp(pname, "krbtgt") == 0 &&
1117 krbcred.times.endtime > time(NULL)
1121 * Test to see if this is a
1122 * tgt for cross-realm auth.
1123 * Rate it higher, if it is not.
1125 cp2 = strchr(cp, '@');
1128 if (strcmp(cp, cp2) ==
1137 retval = krb5_unparse_name(context,
1138 krbcred.client, &pname);
1140 cp = strchr(pname, '@');
1143 if (pw != NULL && strcmp(pname,
1146 if (strchr(pname, '/') == NULL)
1148 if (pref_realm[0] != '\0' &&
1149 strcmp(cp, pref_realm) == 0)
1154 if (rating > orating) {
1156 exptime = krbcred.times.endtime;
1157 } else if (rating == orating &&
1158 krbcred.times.endtime > exptime)
1159 exptime = krbcred.times.endtime;
1162 krb5_free_cred_contents(context, &krbcred);
1164 krb5_cc_end_seq_get(context, ccache, &curse);
1166 krb5_cc_close(context, ccache);
1167 krb5_free_context(context);
1169 *retrating = orating;
1170 *retexptime = exptime;
1173 #else /* WITHOUT_KERBEROS */
1175 #endif /* !WITHOUT_KERBEROS */
1178 #ifndef WITHOUT_KERBEROS
1180 * This function attempts to do essentially a "kinit -k" for the principal
1181 * name provided as the argument, so that there will be a TGT in the
1184 static krb5_error_code
1185 gssd_get_cc_from_keytab(const char *name)
1187 krb5_error_code ret, opt_ret, princ_ret, cc_ret, kt_ret, cred_ret;
1188 krb5_context context;
1189 krb5_principal principal;
1192 krb5_get_init_creds_opt *opt;
1193 krb5_deltat start_time = 0;
1196 ret = krb5_init_context(&context);
1199 opt_ret = cc_ret = kt_ret = cred_ret = 1; /* anything non-zero */
1200 princ_ret = ret = krb5_parse_name(context, name, &principal);
1202 opt_ret = ret = krb5_get_init_creds_opt_alloc(context, &opt);
1204 cc_ret = ret = krb5_cc_default(context, &ccache);
1206 ret = krb5_cc_initialize(context, ccache, principal);
1208 krb5_get_init_creds_opt_set_default_flags(context, "gssd",
1209 krb5_principal_get_realm(context, principal), opt);
1210 kt_ret = ret = krb5_kt_default(context, &kt);
1213 cred_ret = ret = krb5_get_init_creds_keytab(context, &cred,
1214 principal, kt, start_time, NULL, opt);
1216 ret = krb5_cc_store_cred(context, ccache, &cred);
1218 krb5_kt_close(context, kt);
1220 krb5_cc_close(context, ccache);
1222 krb5_get_init_creds_opt_free(context, opt);
1224 krb5_free_principal(context, principal);
1226 krb5_free_cred_contents(context, &cred);
1227 krb5_free_context(context);
1232 * Acquire a gss credential for a uid.
1235 gssd_get_user_cred(OM_uint32 *min_statp, uid_t uid, gss_cred_id_t *credp)
1237 gss_buffer_desc principal_desc;
1239 OM_uint32 maj_stat, min_stat;
1240 gss_OID_set mechlist;
1246 return (GSS_S_FAILURE);
1250 * The mechanism must be set to KerberosV for acquisition
1251 * of credentials to work reliably.
1253 maj_stat = gss_create_empty_oid_set(min_statp, &mechlist);
1254 if (maj_stat != GSS_S_COMPLETE)
1256 maj_stat = gss_add_oid_set_member(min_statp, GSS_KRB5_MECH_OID_X,
1258 if (maj_stat != GSS_S_COMPLETE) {
1259 gss_release_oid_set(&min_stat, &mechlist);
1263 principal_desc.value = (void *)pw->pw_name;
1264 principal_desc.length = strlen(pw->pw_name);
1265 maj_stat = gss_import_name(min_statp, &principal_desc,
1266 GSS_C_NT_USER_NAME, &name);
1267 if (maj_stat != GSS_S_COMPLETE) {
1268 gss_release_oid_set(&min_stat, &mechlist);
1271 /* Acquire the credentials. */
1272 maj_stat = gss_acquire_cred(min_statp, name, 0, mechlist,
1273 GSS_C_INITIATE, credp, NULL, NULL);
1274 gss_release_name(&min_stat, &name);
1275 gss_release_oid_set(&min_stat, &mechlist);
1278 #endif /* !WITHOUT_KERBEROS */
1280 void gssd_terminate(int sig __unused)
1283 #ifndef WITHOUT_KERBEROS
1284 if (hostbased_initiator_cred != 0)
1285 unlink(GSSD_CREDENTIAL_CACHE_FILE);