1: /*
2: * Copyright (c) 1996, 1998-2005, 2007-2013
3: * Todd C. Miller <Todd.Miller@courtesan.com>
4: *
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.
8: *
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.
18: *
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.
22: */
23:
24: #define _SUDO_MAIN
25:
26: #include <config.h>
27:
28: #include <sys/types.h>
29: #include <sys/stat.h>
30: #include <sys/socket.h>
31: #include <stdio.h>
32: #ifdef STDC_HEADERS
33: # include <stdlib.h>
34: # include <stddef.h>
35: #else
36: # ifdef HAVE_STDLIB_H
37: # include <stdlib.h>
38: # endif
39: #endif /* STDC_HEADERS */
40: #ifdef HAVE_STRING_H
41: # include <string.h>
42: #endif /* HAVE_STRING_H */
43: #ifdef HAVE_STRINGS_H
44: # include <strings.h>
45: #endif /* HAVE_STRINGS_H */
46: #ifdef HAVE_UNISTD_H
47: # include <unistd.h>
48: #endif /* HAVE_UNISTD_H */
49: #ifdef HAVE_FNMATCH
50: # include <fnmatch.h>
51: #else
52: # include "compat/fnmatch.h"
53: #endif /* HAVE_FNMATCH */
54: #ifdef HAVE_NETGROUP_H
55: # include <netgroup.h>
56: #endif /* HAVE_NETGROUP_H */
57: #include <ctype.h>
58: #include <errno.h>
59: #include <netinet/in.h>
60: #include <arpa/inet.h>
61:
62: #include "tsgetgrpw.h"
63: #include "sudoers.h"
64: #include "interfaces.h"
65: #include "parse.h"
66: #include "sudo_conf.h"
67: #include "secure_path.h"
68: #include <gram.h>
69:
70: /*
71: * Function Prototypes
72: */
73: int print_alias(void *, void *);
74: void dump_sudoers(void);
75: void print_defaults(void);
76: void print_privilege(struct privilege *);
77: void print_userspecs(void);
78: void usage(void) __attribute__((__noreturn__));
79: static void set_runaspw(const char *);
80: static void set_runasgr(const char *);
81: static int cb_runas_default(const char *);
82: static int testsudoers_print(const char *msg);
83:
84: extern void setgrfile(const char *);
85: extern void setgrent(void);
86: extern void endgrent(void);
87: extern struct group *getgrent(void);
88: extern struct group *getgrnam(const char *);
89: extern struct group *getgrgid(gid_t);
90: extern void setpwfile(const char *);
91: extern void setpwent(void);
92: extern void endpwent(void);
93: extern struct passwd *getpwent(void);
94: extern struct passwd *getpwnam(const char *);
95: extern struct passwd *getpwuid(uid_t);
96:
97: extern int (*trace_print)(const char *msg);
98:
99: /*
100: * Globals
101: */
102: struct sudo_user sudo_user;
103: struct passwd *list_pw;
104: static char *runas_group, *runas_user;
105:
106: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
107: extern char *malloc_options;
108: #endif
109: #ifdef YYDEBUG
110: extern int sudoersdebug;
111: #endif
112:
113: __dso_public int main(int argc, char *argv[]);
114:
115: int
116: main(int argc, char *argv[])
117: {
118: struct cmndspec *cs;
119: struct privilege *priv;
120: struct userspec *us;
121: char *p, *grfile, *pwfile;
122: char hbuf[HOST_NAME_MAX + 1];
123: const char *errstr;
124: int match, host_match, runas_match, cmnd_match;
125: int ch, dflag, exitcode = 0;
126: debug_decl(main, SUDO_DEBUG_MAIN)
127:
128: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
129: malloc_options = "AFGJPR";
130: #endif
131: #ifdef YYDEBUG
132: sudoersdebug = 1;
133: #endif
134:
135: initprogname(argc > 0 ? argv[0] : "testsudoers");
136:
137: sudoers_initlocale(setlocale(LC_ALL, ""), def_sudoers_locale);
138: bindtextdomain("sudoers", LOCALEDIR); /* XXX - should have own domain */
139: textdomain("sudoers");
140:
141: /* Read sudo.conf. */
142: sudo_conf_read(NULL);
143:
144: dflag = 0;
145: grfile = pwfile = NULL;
146: while ((ch = getopt(argc, argv, "dg:G:h:P:p:tu:U:")) != -1) {
147: switch (ch) {
148: case 'd':
149: dflag = 1;
150: break;
151: case 'h':
152: user_host = optarg;
153: break;
154: case 'G':
155: sudoers_gid = (gid_t)atoid(optarg, NULL, NULL, &errstr);
156: if (errstr != NULL)
157: fatalx("group ID %s: %s", optarg, errstr);
158: break;
159: case 'g':
160: runas_group = optarg;
161: break;
162: case 'p':
163: pwfile = optarg;
164: break;
165: case 'P':
166: grfile = optarg;
167: break;
168: case 't':
169: trace_print = testsudoers_print;
170: break;
171: case 'U':
172: sudoers_uid = (uid_t)atoid(optarg, NULL, NULL, &errstr);
173: if (errstr != NULL)
174: fatalx("user ID %s: %s", optarg, errstr);
175: break;
176: case 'u':
177: runas_user = optarg;
178: break;
179: default:
180: usage();
181: break;
182: }
183: }
184: argc -= optind;
185: argv += optind;
186:
187: /* Set group/passwd file and init the cache. */
188: if (grfile)
189: setgrfile(grfile);
190: if (pwfile)
191: setpwfile(pwfile);
192: sudo_setpwent();
193: sudo_setgrent();
194:
195: if (argc < 2) {
196: if (!dflag)
197: usage();
198: user_name = argc ? *argv++ : "root";
199: user_cmnd = user_base = "true";
200: argc = 0;
201: } else {
202: user_name = *argv++;
203: user_cmnd = *argv++;
204: if ((p = strrchr(user_cmnd, '/')) != NULL)
205: user_base = p + 1;
206: else
207: user_base = user_cmnd;
208: argc -= 2;
209: }
210: if ((sudo_user.pw = sudo_getpwnam(user_name)) == NULL)
211: fatalx(U_("unknown user: %s"), user_name);
212:
213: if (user_host == NULL) {
214: if (gethostname(hbuf, sizeof(hbuf)) != 0)
215: fatal("gethostname");
216: hbuf[sizeof(hbuf) - 1] = '\0';
217: user_host = hbuf;
218: }
219: if ((p = strchr(user_host, '.'))) {
220: *p = '\0';
221: user_shost = estrdup(user_host);
222: *p = '.';
223: } else {
224: user_shost = user_host;
225: }
226: user_runhost = user_host;
227: user_srunhost = user_shost;
228:
229: /* Fill in user_args from argv. */
230: if (argc > 0) {
231: char *to, **from;
232: size_t size, n;
233:
234: for (size = 0, from = argv; *from; from++)
235: size += strlen(*from) + 1;
236:
237: user_args = (char *) emalloc(size);
238: for (to = user_args, from = argv; *from; from++) {
239: n = strlcpy(to, *from, size - (to - user_args));
240: if (n >= size - (to - user_args))
241: fatalx(U_("internal error, %s overflow"), "init_vars()");
242: to += n;
243: *to++ = ' ';
244: }
245: *--to = '\0';
246: }
247:
248: /* Initialize default values. */
249: init_defaults();
250:
251: /* Set runas callback. */
252: sudo_defs_table[I_RUNAS_DEFAULT].callback = cb_runas_default;
253:
254: /* Load ip addr/mask for each interface. */
255: if (get_net_ifs(&p) > 0)
256: set_interfaces(p);
257:
258: /* Allocate space for data structures in the parser. */
259: init_parser("sudoers", false);
260:
261: if (sudoersparse() != 0 || parse_error) {
262: parse_error = true;
263: if (errorlineno != -1)
264: (void) printf("Parse error in %s near line %d",
265: errorfile, errorlineno);
266: else
267: (void) printf("Parse error in %s", errorfile);
268: } else {
269: (void) fputs("Parses OK", stdout);
270: }
271:
272: if (!update_defaults(SETDEF_ALL))
273: (void) fputs(" (problem with defaults entries)", stdout);
274: puts(".");
275:
276: if (def_group_plugin && group_plugin_load(def_group_plugin) != true)
277: def_group_plugin = NULL;
278:
279: /*
280: * Set runas passwd/group entries based on command line or sudoers.
281: * Note that if runas_group was specified without runas_user we
282: * defer setting runas_pw so the match routines know to ignore it.
283: */
284: if (runas_group != NULL) {
285: set_runasgr(runas_group);
286: if (runas_user != NULL)
287: set_runaspw(runas_user);
288: } else
289: set_runaspw(runas_user ? runas_user : def_runas_default);
290:
291: if (dflag) {
292: (void) putchar('\n');
293: dump_sudoers();
294: if (argc < 2) {
295: exitcode = parse_error ? 1 : 0;
296: goto done;
297: }
298: }
299:
300: /* This loop must match the one in sudo_file_lookup() */
301: printf("\nEntries for user %s:\n", user_name);
302: match = UNSPEC;
303: TAILQ_FOREACH_REVERSE(us, &userspecs, userspec_list, entries) {
304: if (userlist_matches(sudo_user.pw, &us->users) != ALLOW)
305: continue;
306: TAILQ_FOREACH_REVERSE(priv, &us->privileges, privilege_list, entries) {
307: putchar('\n');
308: print_privilege(priv);
309: putchar('\n');
310: host_match = hostlist_matches(&priv->hostlist);
311: if (host_match == ALLOW) {
312: puts("\thost matched");
313: TAILQ_FOREACH_REVERSE(cs, &priv->cmndlist, cmndspec_list, entries) {
314: runas_match = runaslist_matches(cs->runasuserlist,
315: cs->runasgrouplist, NULL, NULL);
316: if (runas_match == ALLOW) {
317: puts("\trunas matched");
318: cmnd_match = cmnd_matches(cs->cmnd);
319: if (cmnd_match != UNSPEC)
320: match = cmnd_match;
321: printf("\tcmnd %s\n", match == ALLOW ? "allowed" :
322: match == DENY ? "denied" : "unmatched");
323: }
324: }
325: } else
326: puts(_("\thost unmatched"));
327: }
328: }
329: puts(match == ALLOW ? _("\nCommand allowed") :
330: match == DENY ? _("\nCommand denied") : _("\nCommand unmatched"));
331:
332: /*
333: * Exit codes:
334: * 0 - parsed OK and command matched.
335: * 1 - parse error
336: * 2 - command not matched
337: * 3 - command denied
338: */
339: exitcode = parse_error ? 1 : (match == ALLOW ? 0 : match + 3);
340: done:
341: sudo_endpwent();
342: sudo_endgrent();
343: sudo_debug_exit_int(__func__, __FILE__, __LINE__, sudo_debug_subsys, exitcode);
344: exit(exitcode);
345: }
346:
347: static void
348: set_runaspw(const char *user)
349: {
350: struct passwd *pw = NULL;
351: debug_decl(set_runaspw, SUDO_DEBUG_UTIL)
352:
353: if (*user == '#') {
354: const char *errstr;
355: uid_t uid = atoid(user + 1, NULL, NULL, &errstr);
356: if (errstr == NULL) {
357: if ((pw = sudo_getpwuid(uid)) == NULL)
358: pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);
359: }
360: }
361: if (pw == NULL) {
362: if ((pw = sudo_getpwnam(user)) == NULL)
363: fatalx(U_("unknown user: %s"), user);
364: }
365: if (runas_pw != NULL)
366: sudo_pw_delref(runas_pw);
367: runas_pw = pw;
368: debug_return;
369: }
370:
371: static void
372: set_runasgr(const char *group)
373: {
374: struct group *gr = NULL;
375: debug_decl(set_runasgr, SUDO_DEBUG_UTIL)
376:
377: if (*group == '#') {
378: const char *errstr;
379: gid_t gid = atoid(group + 1, NULL, NULL, &errstr);
380: if (errstr == NULL) {
381: if ((gr = sudo_getgrgid(gid)) == NULL)
382: gr = sudo_fakegrnam(group);
383: }
384: }
385: if (gr == NULL) {
386: if ((gr = sudo_getgrnam(group)) == NULL)
387: fatalx(U_("unknown group: %s"), group);
388: }
389: if (runas_gr != NULL)
390: sudo_gr_delref(runas_gr);
391: runas_gr = gr;
392: debug_return;
393: }
394:
395: /*
396: * Callback for runas_default sudoers setting.
397: */
398: static int
399: cb_runas_default(const char *user)
400: {
401: /* Only reset runaspw if user didn't specify one. */
402: if (!runas_user && !runas_group)
403: set_runaspw(user);
404: return true;
405: }
406:
407: void
408: sudo_setspent(void)
409: {
410: return;
411: }
412:
413: void
414: sudo_endspent(void)
415: {
416: return;
417: }
418:
419: FILE *
420: open_sudoers(const char *sudoers, bool doedit, bool *keepopen)
421: {
422: struct stat sb;
423: FILE *fp = NULL;
424: char *sudoers_base;
425: debug_decl(open_sudoers, SUDO_DEBUG_UTIL)
426:
427: sudoers_base = strrchr(sudoers, '/');
428: if (sudoers_base != NULL)
429: sudoers_base++;
430:
431: switch (sudo_secure_file(sudoers, sudoers_uid, sudoers_gid, &sb)) {
432: case SUDO_PATH_SECURE:
433: fp = fopen(sudoers, "r");
434: break;
435: case SUDO_PATH_MISSING:
436: warning("unable to stat %s", sudoers_base);
437: break;
438: case SUDO_PATH_BAD_TYPE:
439: warningx("%s is not a regular file", sudoers_base);
440: break;
441: case SUDO_PATH_WRONG_OWNER:
442: warningx("%s should be owned by uid %u",
443: sudoers_base, (unsigned int) sudoers_uid);
444: break;
445: case SUDO_PATH_WORLD_WRITABLE:
446: warningx("%s is world writable", sudoers_base);
447: break;
448: case SUDO_PATH_GROUP_WRITABLE:
449: warningx("%s should be owned by gid %u",
450: sudoers_base, (unsigned int) sudoers_gid);
451: break;
452: default:
453: /* NOTREACHED */
454: break;
455: }
456:
457: debug_return_ptr(fp);
458: }
459:
460: void
461: init_envtables(void)
462: {
463: return;
464: }
465:
466: int
467: set_perms(int perm)
468: {
469: return 1;
470: }
471:
472: void
473: restore_perms(void)
474: {
475: }
476:
477: void
478: print_member(struct member *m)
479: {
480: struct sudo_command *c;
481: debug_decl(print_member, SUDO_DEBUG_UTIL)
482:
483: if (m->negated)
484: putchar('!');
485: if (m->name == NULL)
486: fputs("ALL", stdout);
487: else if (m->type != COMMAND)
488: fputs(m->name, stdout);
489: else {
490: c = (struct sudo_command *) m->name;
491: printf("%s%s%s", c->cmnd, c->args ? " " : "",
492: c->args ? c->args : "");
493: }
494:
495: debug_return;
496: }
497:
498: void
499: print_defaults(void)
500: {
501: struct defaults *d;
502: struct member *m;
503: debug_decl(print_defaults, SUDO_DEBUG_UTIL)
504:
505: TAILQ_FOREACH(d, &defaults, entries) {
506: (void) fputs("Defaults", stdout);
507: switch (d->type) {
508: case DEFAULTS_HOST:
509: putchar('@');
510: break;
511: case DEFAULTS_USER:
512: putchar(':');
513: break;
514: case DEFAULTS_RUNAS:
515: putchar('>');
516: break;
517: case DEFAULTS_CMND:
518: putchar('!');
519: break;
520: }
521: TAILQ_FOREACH(m, d->binding, entries) {
522: if (m != TAILQ_FIRST(d->binding))
523: putchar(',');
524: print_member(m);
525: }
526: printf("\t%s%s", d->op == false ? "!" : "", d->var);
527: if (d->val != NULL) {
528: printf("%c%s", d->op == true ? '=' : d->op, d->val);
529: }
530: putchar('\n');
531: }
532:
533: debug_return;
534: }
535:
536: int
537: print_alias(void *v1, void *v2)
538: {
539: struct alias *a = (struct alias *)v1;
540: struct member *m;
541: struct sudo_command *c;
542: debug_decl(print_alias, SUDO_DEBUG_UTIL)
543:
544: switch (a->type) {
545: case HOSTALIAS:
546: (void) printf("Host_Alias\t%s = ", a->name);
547: break;
548: case CMNDALIAS:
549: (void) printf("Cmnd_Alias\t%s = ", a->name);
550: break;
551: case USERALIAS:
552: (void) printf("User_Alias\t%s = ", a->name);
553: break;
554: case RUNASALIAS:
555: (void) printf("Runas_Alias\t%s = ", a->name);
556: break;
557: }
558: TAILQ_FOREACH(m, &a->members, entries) {
559: if (m != TAILQ_FIRST(&a->members))
560: fputs(", ", stdout);
561: if (m->type == COMMAND) {
562: c = (struct sudo_command *) m->name;
563: printf("%s%s%s", c->cmnd, c->args ? " " : "",
564: c->args ? c->args : "");
565: } else if (m->type == ALL) {
566: fputs("ALL", stdout);
567: } else {
568: fputs(m->name, stdout);
569: }
570: }
571: putchar('\n');
572: debug_return_int(0);
573: }
574:
575: void
576: print_privilege(struct privilege *priv)
577: {
578: struct cmndspec *cs;
579: struct member *m;
580: struct cmndtag tags;
581: debug_decl(print_privilege, SUDO_DEBUG_UTIL)
582:
583: TAILQ_FOREACH(m, &priv->hostlist, entries) {
584: if (m != TAILQ_FIRST(&priv->hostlist))
585: fputs(", ", stdout);
586: print_member(m);
587: }
588: fputs(" = ", stdout);
589: tags.nopasswd = UNSPEC;
590: tags.noexec = UNSPEC;
591: TAILQ_FOREACH(cs, &priv->cmndlist, entries) {
592: if (cs != TAILQ_FIRST(&priv->cmndlist))
593: fputs(", ", stdout);
594: if (cs->runasuserlist != NULL || cs->runasgrouplist != NULL) {
595: fputs("(", stdout);
596: if (cs->runasuserlist != NULL) {
597: TAILQ_FOREACH(m, cs->runasuserlist, entries) {
598: if (m != TAILQ_FIRST(cs->runasuserlist))
599: fputs(", ", stdout);
600: print_member(m);
601: }
602: } else if (cs->runasgrouplist == NULL) {
603: fputs(def_runas_default, stdout);
604: } else {
605: fputs(sudo_user.pw->pw_name, stdout);
606: }
607: if (cs->runasgrouplist != NULL) {
608: fputs(" : ", stdout);
609: TAILQ_FOREACH(m, cs->runasgrouplist, entries) {
610: if (m != TAILQ_FIRST(cs->runasgrouplist))
611: fputs(", ", stdout);
612: print_member(m);
613: }
614: }
615: fputs(") ", stdout);
616: }
617: #ifdef HAVE_SELINUX
618: if (cs->role)
619: printf("ROLE=%s ", cs->role);
620: if (cs->type)
621: printf("TYPE=%s ", cs->type);
622: #endif /* HAVE_SELINUX */
623: #ifdef HAVE_PRIV_SET
624: if (cs->privs)
625: printf("PRIVS=%s ", cs->privs);
626: if (cs->limitprivs)
627: printf("LIMITPRIVS=%s ", cs->limitprivs);
628: #endif /* HAVE_PRIV_SET */
629: if (cs->tags.nopasswd != UNSPEC && cs->tags.nopasswd != tags.nopasswd)
630: printf("%sPASSWD: ", cs->tags.nopasswd ? "NO" : "");
631: if (cs->tags.noexec != UNSPEC && cs->tags.noexec != tags.noexec)
632: printf("%sEXEC: ", cs->tags.noexec ? "NO" : "");
633: print_member(cs->cmnd);
634: memcpy(&tags, &cs->tags, sizeof(tags));
635: }
636: debug_return;
637: }
638:
639: void
640: print_userspecs(void)
641: {
642: struct member *m;
643: struct userspec *us;
644: struct privilege *priv;
645: debug_decl(print_userspecs, SUDO_DEBUG_UTIL)
646:
647: TAILQ_FOREACH(us, &userspecs, entries) {
648: TAILQ_FOREACH(m, &us->users, entries) {
649: if (m != TAILQ_FIRST(&us->users))
650: fputs(", ", stdout);
651: print_member(m);
652: }
653: putchar('\t');
654: TAILQ_FOREACH(priv, &us->privileges, entries) {
655: if (priv != TAILQ_FIRST(&us->privileges))
656: fputs(" : ", stdout);
657: print_privilege(priv);
658: }
659: putchar('\n');
660: }
661: debug_return;
662: }
663:
664: void
665: dump_sudoers(void)
666: {
667: debug_decl(dump_sudoers, SUDO_DEBUG_UTIL)
668:
669: print_defaults();
670:
671: putchar('\n');
672: alias_apply(print_alias, NULL);
673:
674: putchar('\n');
675: print_userspecs();
676:
677: debug_return;
678: }
679:
680: static int testsudoers_print(const char *msg)
681: {
682: return fputs(msg, stderr);
683: }
684:
685: void
686: usage(void)
687: {
688: (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());
689: exit(1);
690: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to testsudoers.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / sudo / plugins / sudoers