2 * Copyright (c) 1996, 1998-2005, 2007-2012
3 * Todd C. Miller <Todd.Miller@courtesan.com>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
17 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
19 * Sponsored in part by the Defense Advanced Research Projects
20 * Agency (DARPA) and Air Force Research Laboratory, Air Force
21 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
28 #include <sys/param.h>
29 #include <sys/types.h>
31 #include <sys/socket.h>
40 #endif /* STDC_HEADERS */
43 #endif /* HAVE_STRING_H */
46 #endif /* HAVE_STRINGS_H */
49 #endif /* HAVE_UNISTD_H */
53 # include "compat/fnmatch.h"
54 #endif /* HAVE_FNMATCH */
55 #ifdef HAVE_NETGROUP_H
56 # include <netgroup.h>
57 #endif /* HAVE_NETGROUP_H */
60 #include <netinet/in.h>
61 #include <arpa/inet.h>
67 #include "tsgetgrpw.h"
69 #include "interfaces.h"
71 #include "sudo_conf.h"
72 #include "secure_path.h"
78 int print_alias(void *, void *);
79 void dump_sudoers(void);
80 void print_defaults(void);
81 void print_privilege(struct privilege *);
82 void print_userspecs(void);
83 void usage(void) __attribute__((__noreturn__));
85 static void set_runaspw(const char *);
86 static void set_runasgr(const char *);
87 static int cb_runas_default(const char *);
88 static int testsudoers_printf(int msg_type, const char *fmt, ...);
89 static int testsudoers_print(const char *msg);
91 extern void setgrfile(const char *);
92 extern void setgrent(void);
93 extern void endgrent(void);
94 extern struct group *getgrent(void);
95 extern struct group *getgrnam(const char *);
96 extern struct group *getgrgid(gid_t);
97 extern void setpwfile(const char *);
98 extern void setpwent(void);
99 extern void endpwent(void);
100 extern struct passwd *getpwent(void);
101 extern struct passwd *getpwnam(const char *);
102 extern struct passwd *getpwuid(uid_t);
104 extern int (*trace_print)(const char *msg);
109 struct interface *interfaces;
110 struct sudo_user sudo_user;
111 struct passwd *list_pw;
112 static char *runas_group, *runas_user;
113 extern int errorlineno;
114 extern bool parse_error;
115 extern char *errorfile;
116 sudo_printf_t sudo_printf = testsudoers_printf;
117 sudo_conv_t sudo_conv; /* NULL in non-plugin */
123 #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
124 extern char *malloc_options;
131 main(int argc, char *argv[])
134 struct privilege *priv;
136 char *p, *grfile, *pwfile;
137 char hbuf[MAXHOSTNAMELEN + 1];
138 int match, host_match, runas_match, cmnd_match;
139 int ch, dflag, exitcode = 0;
140 debug_decl(main, SUDO_DEBUG_MAIN)
142 #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
143 malloc_options = "AFGJPR";
149 #if !defined(HAVE_GETPROGNAME) && !defined(HAVE___PROGNAME)
150 setprogname(argc > 0 ? argv[0] : "testsudoers");
153 #ifdef HAVE_SETLOCALE
154 setlocale(LC_ALL, "");
156 bindtextdomain("sudoers", LOCALEDIR); /* XXX - should have own domain */
157 textdomain("sudoers");
159 /* Read sudo.conf. */
163 grfile = pwfile = NULL;
164 while ((ch = getopt(argc, argv, "dg:G:h:P:p:tu:U:")) != -1) {
173 sudoers_gid = (gid_t)atoi(optarg);
176 runas_group = optarg;
185 trace_print = testsudoers_print;
188 sudoers_uid = (uid_t)atoi(optarg);
201 /* Set group/passwd file and init the cache. */
212 user_name = argc ? *argv++ : "root";
213 user_cmnd = user_base = "true";
218 if ((p = strrchr(user_cmnd, '/')) != NULL)
221 user_base = user_cmnd;
224 if ((sudo_user.pw = sudo_getpwnam(user_name)) == NULL)
225 errorx(1, _("unknown user: %s"), user_name);
227 if (user_host == NULL) {
228 if (gethostname(hbuf, sizeof(hbuf)) != 0)
229 error(1, "gethostname");
230 hbuf[sizeof(hbuf) - 1] = '\0';
233 if ((p = strchr(user_host, '.'))) {
235 user_shost = estrdup(user_host);
238 user_shost = user_host;
241 /* Fill in user_args from argv. */
246 for (size = 0, from = argv; *from; from++)
247 size += strlen(*from) + 1;
249 user_args = (char *) emalloc(size);
250 for (to = user_args, from = argv; *from; from++) {
251 n = strlcpy(to, *from, size - (to - user_args));
252 if (n >= size - (to - user_args))
253 errorx(1, _("internal error, %s overflow"), "init_vars()");
260 /* Initialize default values. */
263 /* Set runas callback. */
264 sudo_defs_table[I_RUNAS_DEFAULT].callback = cb_runas_default;
266 /* Load ip addr/mask for each interface. */
267 if (get_net_ifs(&p) > 0)
270 /* Allocate space for data structures in the parser. */
271 init_parser("sudoers", false);
273 if (yyparse() != 0 || parse_error) {
275 if (errorlineno != -1)
276 (void) printf("Parse error in %s near line %d",
277 errorfile, errorlineno);
279 (void) printf("Parse error in %s", errorfile);
281 (void) fputs("Parses OK", stdout);
284 if (!update_defaults(SETDEF_ALL))
285 (void) fputs(" (problem with defaults entries)", stdout);
288 if (def_group_plugin && group_plugin_load(def_group_plugin) != true)
289 def_group_plugin = NULL;
292 * Set runas passwd/group entries based on command line or sudoers.
293 * Note that if runas_group was specified without runas_user we
294 * defer setting runas_pw so the match routines know to ignore it.
296 if (runas_group != NULL) {
297 set_runasgr(runas_group);
298 if (runas_user != NULL)
299 set_runaspw(runas_user);
301 set_runaspw(runas_user ? runas_user : def_runas_default);
304 (void) putchar('\n');
307 exitcode = parse_error ? 1 : 0;
312 /* This loop must match the one in sudo_file_lookup() */
313 printf("\nEntries for user %s:\n", user_name);
315 tq_foreach_rev(&userspecs, us) {
316 if (userlist_matches(sudo_user.pw, &us->users) != ALLOW)
318 tq_foreach_rev(&us->privileges, priv) {
320 print_privilege(priv); /* XXX */
322 host_match = hostlist_matches(&priv->hostlist);
323 if (host_match == ALLOW) {
324 puts("\thost matched");
325 tq_foreach_rev(&priv->cmndlist, cs) {
326 runas_match = runaslist_matches(&cs->runasuserlist,
327 &cs->runasgrouplist, NULL, NULL);
328 if (runas_match == ALLOW) {
329 puts("\trunas matched");
330 cmnd_match = cmnd_matches(cs->cmnd);
331 if (cmnd_match != UNSPEC)
333 printf("\tcmnd %s\n", match == ALLOW ? "allowed" :
334 match == DENY ? "denied" : "unmatched");
338 puts(_("\thost unmatched"));
341 puts(match == ALLOW ? _("\nCommand allowed") :
342 match == DENY ? _("\nCommand denied") : _("\nCommand unmatched"));
346 * 0 - parsed OK and command matched.
348 * 2 - command not matched
351 exitcode = parse_error ? 1 : (match == ALLOW ? 0 : match + 3);
353 sudo_debug_exit_int(__func__, __FILE__, __LINE__, sudo_debug_subsys, exitcode);
358 set_runaspw(const char *user)
360 debug_decl(main, SUDO_DEBUG_UTIL)
362 if (runas_pw != NULL)
363 sudo_pw_delref(runas_pw);
365 if ((runas_pw = sudo_getpwuid(atoi(user + 1))) == NULL)
366 runas_pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);
368 if ((runas_pw = sudo_getpwnam(user)) == NULL)
369 errorx(1, _("unknown user: %s"), user);
376 set_runasgr(const char *group)
378 debug_decl(main, SUDO_DEBUG_UTIL)
380 if (runas_gr != NULL)
381 sudo_gr_delref(runas_gr);
383 if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)
384 runas_gr = sudo_fakegrnam(group);
386 if ((runas_gr = sudo_getgrnam(group)) == NULL)
387 errorx(1, _("unknown group: %s"), group);
394 * Callback for runas_default sudoers setting.
397 cb_runas_default(const char *user)
399 /* Only reset runaspw if user didn't specify one. */
400 if (!runas_user && !runas_group)
424 open_sudoers(const char *sudoers, bool doedit, bool *keepopen)
429 debug_decl(open_sudoers, SUDO_DEBUG_UTIL)
431 sudoers_base = strrchr(sudoers, '/');
432 if (sudoers_base != NULL)
435 switch (sudo_secure_file(sudoers, sudoers_uid, sudoers_gid, &sb)) {
436 case SUDO_PATH_SECURE:
437 fp = fopen(sudoers, "r");
439 case SUDO_PATH_MISSING:
440 warning("unable to stat %s", sudoers_base);
442 case SUDO_PATH_BAD_TYPE:
443 warningx("%s is not a regular file", sudoers_base);
445 case SUDO_PATH_WRONG_OWNER:
446 warningx("%s should be owned by uid %u",
447 sudoers_base, (unsigned int) sudoers_uid);
449 case SUDO_PATH_WORLD_WRITABLE:
450 warningx("%s is world writable", sudoers_base);
452 case SUDO_PATH_GROUP_WRITABLE:
453 warningx("%s should be owned by gid %u",
454 sudoers_base, (unsigned int) sudoers_gid);
461 debug_return_ptr(fp);
482 cleanup(int gotsignal)
491 print_member(struct member *m)
493 struct sudo_command *c;
494 debug_decl(print_member, SUDO_DEBUG_UTIL)
499 fputs("ALL", stdout);
500 else if (m->type != COMMAND)
501 fputs(m->name, stdout);
503 c = (struct sudo_command *) m->name;
504 printf("%s%s%s", c->cmnd, c->args ? " " : "",
505 c->args ? c->args : "");
516 debug_decl(print_member, SUDO_DEBUG_UTIL)
518 tq_foreach_fwd(&defaults, d) {
519 (void) fputs("Defaults", stdout);
534 tq_foreach_fwd(&d->binding, m) {
535 if (m != tq_first(&d->binding))
539 printf("\t%s%s", d->op == false ? "!" : "", d->var);
540 if (d->val != NULL) {
541 printf("%c%s", d->op == true ? '=' : d->op, d->val);
550 print_alias(void *v1, void *v2)
552 struct alias *a = (struct alias *)v1;
554 struct sudo_command *c;
555 debug_decl(print_alias, SUDO_DEBUG_UTIL)
559 (void) printf("Host_Alias\t%s = ", a->name);
562 (void) printf("Cmnd_Alias\t%s = ", a->name);
565 (void) printf("User_Alias\t%s = ", a->name);
568 (void) printf("Runas_Alias\t%s = ", a->name);
571 tq_foreach_fwd(&a->members, m) {
572 if (m != tq_first(&a->members))
574 if (m->type == COMMAND) {
575 c = (struct sudo_command *) m->name;
576 printf("%s%s%s", c->cmnd, c->args ? " " : "",
577 c->args ? c->args : "");
578 } else if (m->type == ALL) {
579 fputs("ALL", stdout);
581 fputs(m->name, stdout);
589 print_privilege(struct privilege *priv)
595 debug_decl(print_privilege, SUDO_DEBUG_UTIL)
597 for (p = priv; p != NULL; p = p->next) {
599 fputs(" : ", stdout);
600 tq_foreach_fwd(&p->hostlist, m) {
601 if (m != tq_first(&p->hostlist))
605 fputs(" = ", stdout);
606 tags.nopasswd = tags.noexec = UNSPEC;
607 tq_foreach_fwd(&p->cmndlist, cs) {
608 if (cs != tq_first(&p->cmndlist))
610 if (!tq_empty(&cs->runasuserlist) || !tq_empty(&cs->runasgrouplist)) {
612 if (!tq_empty(&cs->runasuserlist)) {
613 tq_foreach_fwd(&cs->runasuserlist, m) {
614 if (m != tq_first(&cs->runasuserlist))
618 } else if (tq_empty(&cs->runasgrouplist)) {
619 fputs(def_runas_default, stdout);
621 fputs(sudo_user.pw->pw_name, stdout);
623 if (!tq_empty(&cs->runasgrouplist)) {
624 fputs(" : ", stdout);
625 tq_foreach_fwd(&cs->runasgrouplist, m) {
626 if (m != tq_first(&cs->runasgrouplist))
635 printf("ROLE=%s ", cs->role);
637 printf("TYPE=%s ", cs->type);
638 #endif /* HAVE_SELINUX */
641 printf("PRIVS=%s ", cs->privs);
643 printf("LIMITPRIVS=%s ", cs->limitprivs);
644 #endif /* HAVE_PRIV_SET */
645 if (cs->tags.nopasswd != UNSPEC && cs->tags.nopasswd != tags.nopasswd)
646 printf("%sPASSWD: ", cs->tags.nopasswd ? "NO" : "");
647 if (cs->tags.noexec != UNSPEC && cs->tags.noexec != tags.noexec)
648 printf("%sEXEC: ", cs->tags.noexec ? "NO" : "");
649 print_member(cs->cmnd);
650 memcpy(&tags, &cs->tags, sizeof(tags));
657 print_userspecs(void)
661 debug_decl(print_userspecs, SUDO_DEBUG_UTIL)
663 tq_foreach_fwd(&userspecs, us) {
664 tq_foreach_fwd(&us->users, m) {
665 if (m != tq_first(&us->users))
670 print_privilege(us->privileges.first); /* XXX */
677 testsudoers_printf(int msg_type, const char *fmt, ...)
681 debug_decl(testsudoers_printf, SUDO_DEBUG_UTIL)
684 case SUDO_CONV_INFO_MSG:
687 case SUDO_CONV_ERROR_MSG:
692 debug_return_int(-1);
696 vfprintf(fp, fmt, ap);
705 debug_decl(dump_sudoers, SUDO_DEBUG_UTIL)
710 alias_apply(print_alias, NULL);
718 static int testsudoers_print(const char *msg)
720 return fputs(msg, stderr);
726 (void) fprintf(stderr, "usage: %s [-dt] [-G sudoers_gid] [-g group] [-h host] [-p grfile] [-p pwfile] [-U sudoers_uid] [-u user] <user> <command> [args]\n", getprogname());