Annotation of embedaddon/sudo/plugins/sudoers/testsudoers.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (c) 1996, 1998-2005, 2007-2011
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/param.h>
29: #include <sys/types.h>
30: #include <sys/stat.h>
31: #include <sys/socket.h>
32: #include <stdio.h>
33: #ifdef STDC_HEADERS
34: # include <stdlib.h>
35: # include <stddef.h>
36: #else
37: # ifdef HAVE_STDLIB_H
38: # include <stdlib.h>
39: # endif
40: #endif /* STDC_HEADERS */
41: #ifdef HAVE_STRING_H
42: # include <string.h>
43: #endif /* HAVE_STRING_H */
44: #ifdef HAVE_STRINGS_H
45: # include <strings.h>
46: #endif /* HAVE_STRINGS_H */
47: #ifdef HAVE_UNISTD_H
48: # include <unistd.h>
49: #endif /* HAVE_UNISTD_H */
50: #ifdef HAVE_FNMATCH
51: # include <fnmatch.h>
52: #endif /* HAVE_FNMATCH */
53: #ifdef HAVE_NETGROUP_H
54: # include <netgroup.h>
55: #endif /* HAVE_NETGROUP_H */
56: #include <ctype.h>
57: #include <errno.h>
58: #include <netinet/in.h>
59: #include <arpa/inet.h>
60: #include <netdb.h>
61:
62: #include "tsgetgrpw.h"
63: #include "sudoers.h"
64: #include "interfaces.h"
65: #include "parse.h"
66: #include <gram.h>
67:
68: #ifndef HAVE_FNMATCH
69: # include "compat/fnmatch.h"
70: #endif /* HAVE_FNMATCH */
71:
72: /*
73: * Function Prototypes
74: */
75: int print_alias(void *, void *);
76: void dump_sudoers(void);
77: void print_defaults(void);
78: void print_privilege(struct privilege *);
79: void print_userspecs(void);
80: void usage(void) __attribute__((__noreturn__));
81: void cleanup(int);
82: static void set_runaspw(const char *);
83: static void set_runasgr(const char *);
84: static int cb_runas_default(const char *);
85: static int testsudoers_printf(int msg_type, const char *fmt, ...);
86: static int testsudoers_print(const char *msg);
87:
88: extern void setgrfile(const char *);
89: extern void setgrent(void);
90: extern void endgrent(void);
91: extern struct group *getgrent(void);
92: extern struct group *getgrnam(const char *);
93: extern struct group *getgrgid(gid_t);
94: extern void setpwfile(const char *);
95: extern void setpwent(void);
96: extern void endpwent(void);
97: extern struct passwd *getpwent(void);
98: extern struct passwd *getpwnam(const char *);
99: extern struct passwd *getpwuid(uid_t);
100:
101: extern int (*trace_print)(const char *msg);
102:
103: /*
104: * Globals
105: */
106: struct interface *interfaces;
107: struct sudo_user sudo_user;
108: struct passwd *list_pw;
109: static char *runas_group, *runas_user;
110: extern int parse_error;
111: sudo_printf_t sudo_printf = testsudoers_printf;
112:
113: /* For getopt(3) */
114: extern char *optarg;
115: extern int optind;
116:
117: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
118: extern char *malloc_options;
119: #endif
120: #ifdef YYDEBUG
121: extern int yydebug;
122: #endif
123:
124: int
125: main(int argc, char *argv[])
126: {
127: struct cmndspec *cs;
128: struct privilege *priv;
129: struct userspec *us;
130: char *p, *grfile, *pwfile;
131: char hbuf[MAXHOSTNAMELEN + 1];
132: int match, host_match, runas_match, cmnd_match;
133: int ch, dflag;
134:
135: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
136: malloc_options = "AFGJPR";
137: #endif
138: #ifdef YYDEBUG
139: yydebug = 1;
140: #endif
141:
142: #if !defined(HAVE_GETPROGNAME) && !defined(HAVE___PROGNAME)
143: setprogname(argc > 0 ? argv[0] : "testsudoers");
144: #endif
145:
146: dflag = 0;
147: grfile = pwfile = NULL;
148: while ((ch = getopt(argc, argv, "dg:G:h:p:tu:")) != -1) {
149: switch (ch) {
150: case 'd':
151: dflag = 1;
152: break;
153: case 'h':
154: user_host = optarg;
155: break;
156: case 'G':
157: grfile = optarg;
158: break;
159: case 'g':
160: runas_group = optarg;
161: break;
162: case 'p':
163: pwfile = optarg;
164: break;
165: case 't':
166: trace_print = testsudoers_print;
167: break;
168: case 'u':
169: runas_user = optarg;
170: break;
171: default:
172: usage();
173: break;
174: }
175: }
176: argc -= optind;
177: argv += optind;
178:
179: /* Set group/passwd file and init the cache. */
180: if (grfile)
181: setgrfile(grfile);
182: if (pwfile)
183: setpwfile(pwfile);
184: sudo_setpwent();
185: sudo_setgrent();
186:
187: if (argc < 2) {
188: if (!dflag)
189: usage();
190: user_name = "root";
191: user_cmnd = user_base = "true";
192: } else {
193: user_name = *argv;
194: user_cmnd = *++argv;
195: if ((p = strrchr(user_cmnd, '/')) != NULL)
196: user_base = p + 1;
197: else
198: user_base = user_cmnd;
199: argc -= 2;
200: }
201: if ((sudo_user.pw = sudo_getpwnam(user_name)) == NULL)
202: errorx(1, _("unknown user: %s"), user_name);
203:
204: if (user_host == NULL) {
205: if (gethostname(hbuf, sizeof(hbuf)) != 0)
206: error(1, "gethostname");
207: hbuf[sizeof(hbuf) - 1] = '\0';
208: user_host = hbuf;
209: }
210: if ((p = strchr(user_host, '.'))) {
211: *p = '\0';
212: user_shost = estrdup(user_host);
213: *p = '.';
214: } else {
215: user_shost = user_host;
216: }
217:
218: /* Fill in user_args from argv. */
219: if (argc > 0) {
220: char *to, **from;
221: size_t size, n;
222:
223: for (size = 0, from = argv + 1; *from; from++)
224: size += strlen(*from) + 1;
225:
226: user_args = (char *) emalloc(size);
227: for (to = user_args, from = argv + 1; *from; from++) {
228: n = strlcpy(to, *from, size - (to - user_args));
229: if (n >= size - (to - user_args))
230: errorx(1, _("internal error, init_vars() overflow"));
231: to += n;
232: *to++ = ' ';
233: }
234: *--to = '\0';
235: }
236:
237: /* Initialize default values. */
238: init_defaults();
239:
240: /* Set runas callback. */
241: sudo_defs_table[I_RUNAS_DEFAULT].callback = cb_runas_default;
242:
243: /* Load ip addr/mask for each interface. */
244: if (get_net_ifs(&p) > 0)
245: set_interfaces(p);
246:
247: /* Allocate space for data structures in the parser. */
248: init_parser("sudoers", 0);
249:
250: if (yyparse() != 0 || parse_error) {
251: parse_error = TRUE;
252: (void) fputs("Does not parse", stdout);
253: } else {
254: (void) fputs("Parses OK", stdout);
255: }
256:
257: if (!update_defaults(SETDEF_ALL))
258: (void) fputs(" (problem with defaults entries)", stdout);
259: puts(".");
260:
261: if (def_group_plugin && group_plugin_load(def_group_plugin) != TRUE)
262: def_group_plugin = NULL;
263:
264: /*
265: * Set runas passwd/group entries based on command line or sudoers.
266: * Note that if runas_group was specified without runas_user we
267: * defer setting runas_pw so the match routines know to ignore it.
268: */
269: if (runas_group != NULL) {
270: set_runasgr(runas_group);
271: if (runas_user != NULL)
272: set_runaspw(runas_user);
273: } else
274: set_runaspw(runas_user ? runas_user : def_runas_default);
275:
276: if (dflag) {
277: (void) putchar('\n');
278: dump_sudoers();
279: if (argc < 2)
280: exit(parse_error ? 1 : 0);
281: }
282:
283: /* This loop must match the one in sudo_file_lookup() */
284: printf("\nEntries for user %s:\n", user_name);
285: match = UNSPEC;
286: tq_foreach_rev(&userspecs, us) {
287: if (userlist_matches(sudo_user.pw, &us->users) != ALLOW)
288: continue;
289: tq_foreach_rev(&us->privileges, priv) {
290: putchar('\n');
291: print_privilege(priv); /* XXX */
292: putchar('\n');
293: host_match = hostlist_matches(&priv->hostlist);
294: if (host_match == ALLOW) {
295: puts("\thost matched");
296: tq_foreach_rev(&priv->cmndlist, cs) {
297: runas_match = runaslist_matches(&cs->runasuserlist,
298: &cs->runasgrouplist);
299: if (runas_match == ALLOW) {
300: puts("\trunas matched");
301: cmnd_match = cmnd_matches(cs->cmnd);
302: if (cmnd_match != UNSPEC)
303: match = cmnd_match;
304: printf("\tcmnd %s\n", match == ALLOW ? "allowed" :
305: match == DENY ? "denied" : "unmatched");
306: }
307: }
308: } else
309: puts(_("\thost unmatched"));
310: }
311: }
312: puts(match == ALLOW ? _("\nCommand allowed") :
313: match == DENY ? _("\nCommand denied") : _("\nCommand unmatched"));
314:
315: /*
316: * Exit codes:
317: * 0 - parsed OK and command matched.
318: * 1 - parse error
319: * 2 - command not matched
320: * 3 - command denied
321: */
322: if (parse_error)
323: exit(1);
324: exit(match == ALLOW ? 0 : match + 3);
325: }
326:
327: static void
328: set_runaspw(const char *user)
329: {
330: if (runas_pw != NULL)
331: pw_delref(runas_pw);
332: if (*user == '#') {
333: if ((runas_pw = sudo_getpwuid(atoi(user + 1))) == NULL)
334: runas_pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);
335: } else {
336: if ((runas_pw = sudo_getpwnam(user)) == NULL)
337: errorx(1, _("unknown user: %s"), user);
338: }
339: }
340:
341: static void
342: set_runasgr(const char *group)
343: {
344: if (runas_gr != NULL)
345: gr_delref(runas_gr);
346: if (*group == '#') {
347: if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)
348: runas_gr = sudo_fakegrnam(group);
349: } else {
350: if ((runas_gr = sudo_getgrnam(group)) == NULL)
351: errorx(1, _("unknown group: %s"), group);
352: }
353: }
354:
355: /*
356: * Callback for runas_default sudoers setting.
357: */
358: static int
359: cb_runas_default(const char *user)
360: {
361: /* Only reset runaspw if user didn't specify one. */
362: if (!runas_user && !runas_group)
363: set_runaspw(user);
364: return TRUE;
365: }
366:
367: void
368: sudo_setspent(void)
369: {
370: return;
371: }
372:
373: void
374: sudo_endspent(void)
375: {
376: return;
377: }
378:
379: void
380: set_fqdn(void)
381: {
382: return;
383: }
384:
385: FILE *
386: open_sudoers(const char *path, int isdir, int *keepopen)
387: {
388: return fopen(path, "r");
389: }
390:
391: void
392: init_envtables(void)
393: {
394: return;
395: }
396:
397: int
398: set_perms(int perm)
399: {
400: return 1;
401: }
402:
403: void
404: restore_perms(void)
405: {
406: }
407:
408: void
409: cleanup(int gotsignal)
410: {
411: if (!gotsignal) {
412: sudo_endpwent();
413: sudo_endgrent();
414: }
415: }
416:
417: void
418: print_member(struct member *m)
419: {
420: struct sudo_command *c;
421:
422: if (m->negated)
423: putchar('!');
424: if (m->name == NULL)
425: fputs("ALL", stdout);
426: else if (m->type != COMMAND)
427: fputs(m->name, stdout);
428: else {
429: c = (struct sudo_command *) m->name;
430: printf("%s%s%s", c->cmnd, c->args ? " " : "",
431: c->args ? c->args : "");
432: }
433: }
434:
435: void
436: print_defaults(void)
437: {
438: struct defaults *d;
439: struct member *m;
440:
441: tq_foreach_fwd(&defaults, d) {
442: (void) fputs("Defaults", stdout);
443: switch (d->type) {
444: case DEFAULTS_HOST:
445: putchar('@');
446: break;
447: case DEFAULTS_USER:
448: putchar(':');
449: break;
450: case DEFAULTS_RUNAS:
451: putchar('>');
452: break;
453: case DEFAULTS_CMND:
454: putchar('!');
455: break;
456: }
457: tq_foreach_fwd(&d->binding, m) {
458: if (m != tq_first(&d->binding))
459: putchar(',');
460: print_member(m);
461: }
462: printf("\t%s%s", d->op == FALSE ? "!" : "", d->var);
463: if (d->val != NULL) {
464: printf("%c%s", d->op == TRUE ? '=' : d->op, d->val);
465: }
466: putchar('\n');
467: }
468: }
469:
470: int
471: print_alias(void *v1, void *v2)
472: {
473: struct alias *a = (struct alias *)v1;
474: struct member *m;
475: struct sudo_command *c;
476:
477: switch (a->type) {
478: case HOSTALIAS:
479: (void) printf("Host_Alias\t%s = ", a->name);
480: break;
481: case CMNDALIAS:
482: (void) printf("Cmnd_Alias\t%s = ", a->name);
483: break;
484: case USERALIAS:
485: (void) printf("User_Alias\t%s = ", a->name);
486: break;
487: case RUNASALIAS:
488: (void) printf("Runas_Alias\t%s = ", a->name);
489: break;
490: }
491: tq_foreach_fwd(&a->members, m) {
492: if (m != tq_first(&a->members))
493: fputs(", ", stdout);
494: if (m->type == COMMAND) {
495: c = (struct sudo_command *) m->name;
496: printf("%s%s%s", c->cmnd, c->args ? " " : "",
497: c->args ? c->args : "");
498: } else if (m->type == ALL) {
499: fputs("ALL", stdout);
500: } else {
501: fputs(m->name, stdout);
502: }
503: }
504: putchar('\n');
505: return 0;
506: }
507:
508: void
509: print_privilege(struct privilege *priv)
510: {
511: struct cmndspec *cs;
512: struct member *m;
513: struct privilege *p;
514: struct cmndtag tags;
515:
516: for (p = priv; p != NULL; p = p->next) {
517: if (p != priv)
518: fputs(" : ", stdout);
519: tq_foreach_fwd(&p->hostlist, m) {
520: if (m != tq_first(&p->hostlist))
521: fputs(", ", stdout);
522: print_member(m);
523: }
524: fputs(" = ", stdout);
525: tags.nopasswd = tags.noexec = UNSPEC;
526: tq_foreach_fwd(&p->cmndlist, cs) {
527: if (cs != tq_first(&p->cmndlist))
528: fputs(", ", stdout);
529: if (!tq_empty(&cs->runasuserlist) || !tq_empty(&cs->runasgrouplist)) {
530: fputs("(", stdout);
531: if (!tq_empty(&cs->runasuserlist)) {
532: tq_foreach_fwd(&cs->runasuserlist, m) {
533: if (m != tq_first(&cs->runasuserlist))
534: fputs(", ", stdout);
535: print_member(m);
536: }
537: } else if (tq_empty(&cs->runasgrouplist)) {
538: fputs(def_runas_default, stdout);
539: } else {
540: fputs(sudo_user.pw->pw_name, stdout);
541: }
542: if (!tq_empty(&cs->runasgrouplist)) {
543: fputs(" : ", stdout);
544: tq_foreach_fwd(&cs->runasgrouplist, m) {
545: if (m != tq_first(&cs->runasgrouplist))
546: fputs(", ", stdout);
547: print_member(m);
548: }
549: }
550: fputs(") ", stdout);
551: }
552: #ifdef HAVE_SELINUX
553: if (cs->role)
554: printf("ROLE=%s ", cs->role);
555: if (cs->type)
556: printf("TYPE=%s ", cs->type);
557: #endif /* HAVE_SELINUX */
558: if (cs->tags.nopasswd != UNSPEC && cs->tags.nopasswd != tags.nopasswd)
559: printf("%sPASSWD: ", cs->tags.nopasswd ? "NO" : "");
560: if (cs->tags.noexec != UNSPEC && cs->tags.noexec != tags.noexec)
561: printf("%sEXEC: ", cs->tags.noexec ? "NO" : "");
562: print_member(cs->cmnd);
563: memcpy(&tags, &cs->tags, sizeof(tags));
564: }
565: }
566: }
567:
568: void
569: print_userspecs(void)
570: {
571: struct member *m;
572: struct userspec *us;
573:
574: tq_foreach_fwd(&userspecs, us) {
575: tq_foreach_fwd(&us->users, m) {
576: if (m != tq_first(&us->users))
577: fputs(", ", stdout);
578: print_member(m);
579: }
580: putchar('\t');
581: print_privilege(us->privileges.first); /* XXX */
582: putchar('\n');
583: }
584: }
585:
586: static int
587: testsudoers_printf(int msg_type, const char *fmt, ...)
588: {
589: va_list ap;
590: FILE *fp;
591:
592: switch (msg_type) {
593: case SUDO_CONV_INFO_MSG:
594: fp = stdout;
595: break;
596: case SUDO_CONV_ERROR_MSG:
597: fp = stderr;
598: break;
599: default:
600: errno = EINVAL;
601: return -1;
602: }
603:
604: va_start(ap, fmt);
605: vfprintf(fp, fmt, ap);
606: va_end(ap);
607:
608: return 0;
609: }
610:
611: void
612: dump_sudoers(void)
613: {
614: print_defaults();
615:
616: putchar('\n');
617: alias_apply(print_alias, NULL);
618:
619: putchar('\n');
620: print_userspecs();
621: }
622:
623: static int testsudoers_print(const char *msg)
624: {
625: return fputs(msg, stderr);
626: }
627:
628: void
629: usage(void)
630: {
631: (void) fprintf(stderr, "usage: %s [-dt] [-G grfile] [-g group] [-h host] [-p pwfile] [-u user] <user> <command> [args]\n", getprogname());
632: exit(1);
633: }
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