Annotation of src/usr.bin/sudo/testsudoers.c, Revision 1.18
1.1 millert 1: /*
1.18 ! millert 2: * Copyright (c) 1996, 1998-2005, 2007-2009
1.16 millert 3: * Todd C. Miller <Todd.Miller@courtesan.com>
1.1 millert 4: *
1.11 millert 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.
1.1 millert 8: *
1.11 millert 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.
1.1 millert 16: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
17: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.10 millert 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.
1.1 millert 22: */
23:
1.9 millert 24: #define _SUDO_MAIN
25:
1.12 millert 26: #include <config.h>
1.1 millert 27:
1.5 millert 28: #include <sys/param.h>
29: #include <sys/types.h>
30: #include <sys/stat.h>
31: #include <sys/socket.h>
1.1 millert 32: #include <stdio.h>
33: #ifdef STDC_HEADERS
34: # include <stdlib.h>
1.5 millert 35: # include <stddef.h>
36: #else
37: # ifdef HAVE_STDLIB_H
38: # include <stdlib.h>
39: # endif
1.1 millert 40: #endif /* STDC_HEADERS */
1.5 millert 41: #ifdef HAVE_STRING_H
42: # include <string.h>
43: #else
44: # ifdef HAVE_STRINGS_H
45: # include <strings.h>
46: # endif
47: #endif /* HAVE_STRING_H */
1.1 millert 48: #ifdef HAVE_UNISTD_H
49: # include <unistd.h>
50: #endif /* HAVE_UNISTD_H */
1.2 millert 51: #ifdef HAVE_FNMATCH
1.1 millert 52: # include <fnmatch.h>
1.9 millert 53: #endif /* HAVE_FNMATCH */
1.1 millert 54: #ifdef HAVE_NETGROUP_H
55: # include <netgroup.h>
56: #endif /* HAVE_NETGROUP_H */
57: #include <ctype.h>
58: #include <pwd.h>
59: #include <grp.h>
60: #include <netinet/in.h>
61: #include <arpa/inet.h>
62: #include <netdb.h>
63:
64: #include "sudo.h"
1.16 millert 65: #include "interfaces.h"
1.1 millert 66: #include "parse.h"
1.16 millert 67: #include <gram.h>
1.1 millert 68:
69: #ifndef HAVE_FNMATCH
70: # include "emul/fnmatch.h"
71: #endif /* HAVE_FNMATCH */
72:
73: #ifndef lint
1.18 ! millert 74: __unused static const char rcsid[] = "$Sudo: testsudoers.c,v 1.131 2009/05/25 12:02:42 millert Exp $";
1.1 millert 75: #endif /* lint */
76:
1.5 millert 77:
78: /*
1.1 millert 79: * Globals
80: */
1.9 millert 81: int Argc, NewArgc;
1.1 millert 82: char **Argv, **NewArgv;
83: int num_interfaces;
84: struct interface *interfaces;
85: struct sudo_user sudo_user;
1.16 millert 86: struct passwd *list_pw;
87: extern int parse_error;
88:
89: /* passwd/group redirection for pwutil.c */
90: void (*my_setgrent) __P((void)) = setgrent;
91: void (*my_endgrent) __P((void)) = endgrent;
92: struct group *(*my_getgrnam) __P((const char *)) = getgrnam;
93: struct group *(*my_getgrgid) __P((gid_t)) = getgrgid;
94: void (*my_setpwent) __P((void)) = setpwent;
95: void (*my_endpwent) __P((void)) = endpwent;
96: struct passwd *(*my_getpwnam) __P((const char *)) = getpwnam;
97: struct passwd *(*my_getpwuid) __P((uid_t)) = getpwuid;
98:
99: /* For getopt(3) */
100: extern char *optarg;
101: extern int optind;
102:
1.17 millert 103: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
104: extern char *malloc_options;
105: #endif
106: #ifdef YYDEBUG
107: extern int yydebug;
108: #endif
109:
1.16 millert 110: int print_alias __P((void *, void *));
111: void dump_sudoers __P((void));
112: void print_defaults __P((void));
113: void print_privilege __P((struct privilege *));
114: void print_userspecs __P((void));
115: void usage __P((void)) __attribute__((__noreturn__));
116: void set_runasgr __P((char *));
117: void set_runaspw __P((char *));
118:
119: extern void ts_setgrfile __P((const char *));
120: extern void ts_setgrent __P((void));
121: extern void ts_endgrent __P((void));
122: extern struct group *ts_getgrent __P((void));
123: extern struct group *ts_getgrnam __P((const char *));
124: extern struct group *ts_getgrgid __P((gid_t));
125: extern void ts_setpwfile __P((const char *));
126: extern void ts_setpwent __P((void));
127: extern void ts_endpwent __P((void));
128: extern struct passwd *ts_getpwent __P((void));
129: extern struct passwd *ts_getpwnam __P((const char *));
130: extern struct passwd *ts_getpwuid __P((uid_t));
1.1 millert 131:
132: int
1.16 millert 133: main(argc, argv)
134: int argc;
135: char **argv;
1.1 millert 136: {
1.16 millert 137: struct cmndspec *cs;
138: struct privilege *priv;
139: struct userspec *us;
140: char *p, *grfile, *pwfile, *runas_group, *runas_user;
141: char hbuf[MAXHOSTNAMELEN + 1];
142: int ch, dflag, rval, matched;
1.17 millert 143:
144: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
145: malloc_options = "AFGJPR";
146: #endif
147: #ifdef YYDEBUG
1.16 millert 148: yydebug = 1;
149: #endif
1.11 millert 150:
1.16 millert 151: Argv = argv;
152: Argc = argc;
153:
154: dflag = 0;
155: grfile = pwfile = runas_group = runas_user = NULL;
156: while ((ch = getopt(argc, argv, "dg:G:h:p:u:")) != -1) {
157: switch (ch) {
158: case 'd':
159: dflag = 1;
160: break;
161: case 'h':
162: user_host = optarg;
163: break;
164: case 'G':
165: grfile = optarg;
166: break;
167: case 'g':
168: runas_group = optarg;
169: break;
170: case 'p':
171: pwfile = optarg;
172: break;
173: case 'u':
174: runas_user = optarg;
175: break;
176: default:
177: usage();
178: break;
179: }
180: }
181: argc -= optind;
182: argv += optind;
183: NewArgc = argc;
184: NewArgv = argv;
185:
186: /* Set group/passwd file and init the cache. */
187: if (grfile) {
188: my_setgrent = ts_setgrent;
189: my_endgrent = ts_endgrent;
190: my_getgrnam = ts_getgrnam;
191: my_getgrgid = ts_getgrgid;
192: ts_setgrfile(grfile);
193: }
194: if (pwfile) {
195: my_setpwent = ts_setpwent;
196: my_endpwent = ts_endpwent;
197: my_getpwnam = ts_getpwnam;
198: my_getpwuid = ts_getpwuid;
199: ts_setpwfile(pwfile);
200: }
201: sudo_setpwent();
202: sudo_setgrent();
203:
204: if (argc < 2) {
205: if (!dflag)
206: usage();
207: if ((sudo_user.pw = sudo_getpwnam("nobody")) == NULL)
208: errorx(1, "no passwd entry for nobody!");
209: user_cmnd = user_base = "true";
210: } else {
211: if ((sudo_user.pw = sudo_getpwnam(*argv)) == NULL)
212: errorx(1, "no passwd entry for %s!", *argv);
213: user_cmnd = *++argv;
214: if ((p = strrchr(user_cmnd, '/')) != NULL)
215: user_base = p + 1;
216: else
217: user_base = user_cmnd;
218: NewArgc -= 2;
1.1 millert 219: }
220:
1.16 millert 221: if (user_host == NULL) {
222: if (gethostname(hbuf, sizeof(hbuf)) != 0)
223: error(1, "gethostname");
224: hbuf[sizeof(hbuf) - 1] = '\0';
225: user_host = hbuf;
226: }
227: if ((p = strchr(user_host, '.'))) {
228: *p = '\0';
229: user_shost = estrdup(user_host);
230: *p = '.';
1.1 millert 231: } else {
1.16 millert 232: user_shost = user_host;
1.1 millert 233: }
234:
1.16 millert 235: /* Fill in user_args from NewArgv. */
236: if (NewArgc > 1) {
237: char *to, **from;
238: size_t size, n;
1.13 millert 239:
1.16 millert 240: for (size = 0, from = NewArgv + 1; *from; from++)
241: size += strlen(*from) + 1;
1.13 millert 242:
1.16 millert 243: user_args = (char *) emalloc(size);
244: for (to = user_args, from = NewArgv + 1; *from; from++) {
245: n = strlcpy(to, *from, size - (to - user_args));
246: if (n >= size - (to - user_args))
247: errorx(1, "internal error, init_vars() overflow");
248: to += n;
249: *to++ = ' ';
1.13 millert 250: }
1.16 millert 251: *--to = '\0';
1.13 millert 252: }
253:
1.16 millert 254: /* Initialize default values. */
255: init_defaults();
256:
257: /* Load ip addr/mask for each interface. */
258: load_interfaces();
1.13 millert 259:
1.16 millert 260: /* Allocate space for data structures in the parser. */
261: init_parser("sudoers", 0);
1.13 millert 262:
1.16 millert 263: if (yyparse() != 0 || parse_error)
264: (void) fputs("Does not parse", stdout);
1.13 millert 265: else
1.16 millert 266: (void) fputs("Parses OK", stdout);
267:
268: if (!update_defaults(SETDEF_ALL))
269: (void) fputs(" (problem with defaults entries)", stdout);
270: puts(".");
271:
272: /*
273: * Set runas passwd/group entries based on command line or sudoers.
274: * Note that if runas_group was specified without runas_user we
275: * defer setting runas_pw so the match routines know to ignore it.
276: */
277: if (runas_group != NULL) {
278: set_runasgr(runas_group);
279: if (runas_user != NULL)
280: set_runaspw(runas_user);
281: } else
282: set_runaspw(runas_user ? runas_user : def_runas_default);
1.1 millert 283:
1.16 millert 284: if (dflag) {
285: (void) putchar('\n');
286: dump_sudoers();
287: if (argc < 2)
288: exit(0);
1.13 millert 289: }
1.1 millert 290:
1.16 millert 291: /* This loop must match the one in sudoers_lookup() */
292: printf("\nEntries for user %s:\n", user_name);
293: matched = UNSPEC;
294: tq_foreach_rev(&userspecs, us) {
295: if (userlist_matches(sudo_user.pw, &us->users) != ALLOW)
1.13 millert 296: continue;
1.16 millert 297: tq_foreach_rev(&us->privileges, priv) {
298: putchar('\n');
299: print_privilege(priv); /* XXX */
300: putchar('\n');
301: if (hostlist_matches(&priv->hostlist) == ALLOW) {
302: puts("\thost matched");
303: tq_foreach_rev(&priv->cmndlist, cs) {
304: if (runaslist_matches(&cs->runasuserlist,
305: &cs->runasgrouplist) == ALLOW) {
306: puts("\trunas matched");
307: rval = cmnd_matches(cs->cmnd);
308: if (rval != UNSPEC)
309: matched = rval;
310: printf("\tcmnd %s\n", rval == ALLOW ? "allowed" :
311: rval == DENY ? "denied" : "unmatched");
312: }
1.13 millert 313: }
1.16 millert 314: } else
315: puts("\thost unmatched");
1.13 millert 316: }
1.1 millert 317: }
1.16 millert 318: printf("\nCommand %s\n", matched == ALLOW ? "allowed" :
319: matched == DENY ? "denied" : "unmatched");
1.1 millert 320:
1.16 millert 321: exit(0);
1.13 millert 322: }
323:
1.16 millert 324: void
325: set_runaspw(user)
326: char *user;
1.13 millert 327: {
1.16 millert 328: if (*user == '#') {
329: if ((runas_pw = sudo_getpwuid(atoi(user + 1))) == NULL)
330: runas_pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);
1.4 millert 331: } else {
1.16 millert 332: if ((runas_pw = sudo_getpwnam(user)) == NULL)
333: errorx(1, "unknown user: %s", user);
1.4 millert 334: }
1.1 millert 335: }
336:
1.16 millert 337: void
338: set_runasgr(group)
339: char *group;
1.11 millert 340: {
1.16 millert 341: if (*group == '#') {
342: if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)
343: runas_gr = sudo_fakegrnam(group);
344: } else {
345: if ((runas_gr = sudo_getgrnam(group)) == NULL)
346: errorx(1, "unknown group: %s", group);
1.11 millert 347: }
348: }
349:
1.16 millert 350: void
351: sudo_setspent()
1.1 millert 352: {
1.16 millert 353: return;
1.1 millert 354: }
355:
1.16 millert 356: void
357: sudo_endspent()
1.1 millert 358: {
1.16 millert 359: return;
1.1 millert 360: }
361:
1.16 millert 362: char *
363: sudo_getepw(pw)
364: const struct passwd *pw;
1.2 millert 365: {
1.16 millert 366: return (pw->pw_passwd);
1.2 millert 367: }
368:
369: void
370: set_fqdn()
1.5 millert 371: {
372: return;
373: }
374:
1.16 millert 375: FILE *
1.18 ! millert 376: open_sudoers(path, isdir, keepopen)
1.16 millert 377: const char *path;
1.18 ! millert 378: int isdir;
1.16 millert 379: int *keepopen;
1.11 millert 380: {
1.16 millert 381: return(fopen(path, "r"));
1.11 millert 382: }
383:
1.5 millert 384: void
385: init_envtables()
1.1 millert 386: {
387: return;
388: }
389:
1.18 ! millert 390: int
1.16 millert 391: set_perms(perm)
392: int perm;
1.1 millert 393: {
1.18 ! millert 394: return(1);
1.16 millert 395: }
1.1 millert 396:
1.16 millert 397: void
398: cleanup(gotsignal)
399: int gotsignal;
400: {
401: if (!gotsignal) {
402: sudo_endpwent();
403: sudo_endgrent();
404: }
405: }
1.1 millert 406:
1.16 millert 407: void
408: print_member(m)
409: struct member *m;
410: {
411: struct sudo_command *c;
1.1 millert 412:
1.16 millert 413: if (m->negated)
414: putchar('!');
415: if (m->name == NULL)
416: fputs("ALL", stdout);
417: else if (m->type != COMMAND)
418: fputs(m->name, stdout);
419: else {
420: c = (struct sudo_command *) m->name;
421: printf("%s%s%s", c->cmnd, c->args ? " " : "",
422: c->args ? c->args : "");
1.1 millert 423: }
1.16 millert 424: }
1.1 millert 425:
1.16 millert 426: void
427: print_defaults()
428: {
429: struct defaults *d;
430: struct member *m;
1.1 millert 431:
1.16 millert 432: tq_foreach_fwd(&defaults, d) {
433: (void) fputs("Defaults", stdout);
434: switch (d->type) {
435: case DEFAULTS_HOST:
436: putchar('@');
437: break;
438: case DEFAULTS_USER:
439: putchar(':');
440: break;
441: case DEFAULTS_RUNAS:
442: putchar('>');
443: break;
444: case DEFAULTS_CMND:
445: putchar('!');
446: break;
447: }
448: tq_foreach_fwd(&d->binding, m) {
449: if (m != tq_first(&d->binding))
450: putchar(',');
451: print_member(m);
452: }
453: printf("\t%s%s", d->op == FALSE ? "!" : "", d->var);
454: if (d->val != NULL) {
455: printf("%c%s", d->op == TRUE ? '=' : d->op, d->val);
456: }
457: putchar('\n');
1.1 millert 458: }
1.16 millert 459: }
1.1 millert 460:
1.16 millert 461: int
462: print_alias(v1, v2)
463: void *v1, *v2;
464: {
465: struct alias *a = (struct alias *)v1;
466: struct member *m;
467: struct sudo_command *c;
468:
469: switch (a->type) {
470: case HOSTALIAS:
471: (void) printf("Host_Alias\t%s = ", a->name);
472: break;
473: case CMNDALIAS:
474: (void) printf("Cmnd_Alias\t%s = ", a->name);
475: break;
476: case USERALIAS:
477: (void) printf("User_Alias\t%s = ", a->name);
478: break;
479: case RUNASALIAS:
480: (void) printf("Runas_Alias\t%s = ", a->name);
481: break;
482: }
483: tq_foreach_fwd(&a->members, m) {
484: if (m != tq_first(&a->members))
485: fputs(", ", stdout);
486: if (m->type == COMMAND) {
487: c = (struct sudo_command *) m->name;
488: printf("%s%s%s", c->cmnd, c->args ? " " : "",
489: c->args ? c->args : "");
490: } else
491: fputs(m->name, stdout);
492: }
493: putchar('\n');
494: return(0);
495: }
1.1 millert 496:
1.16 millert 497: void
498: print_privilege(priv)
499: struct privilege *priv;
500: {
501: struct cmndspec *cs;
502: struct member *m;
503: struct privilege *p;
504: struct cmndtag tags;
505:
506: for (p = priv; p != NULL; p = p->next) {
507: if (p != priv)
508: fputs(" : ", stdout);
509: tq_foreach_fwd(&p->hostlist, m) {
510: if (m != tq_first(&p->hostlist))
511: fputs(", ", stdout);
512: print_member(m);
513: }
514: fputs(" = ", stdout);
515: tags.nopasswd = tags.noexec = UNSPEC;
516: tq_foreach_fwd(&p->cmndlist, cs) {
517: if (cs != tq_first(&p->cmndlist))
518: fputs(", ", stdout);
519: /* XXX - runasgrouplist too */
520: if (!tq_empty(&cs->runasuserlist)) {
521: fputs("(", stdout);
522: tq_foreach_fwd(&cs->runasuserlist, m) {
523: if (m != tq_first(&cs->runasuserlist))
524: fputs(", ", stdout);
525: print_member(m);
526: }
527: fputs(") ", stdout);
528: }
529: #ifdef HAVE_SELINUX
530: if (cs->role)
531: printf("ROLE=%s ", cs->role);
532: if (cs->type)
533: printf("TYPE=%s ", cs->type);
534: #endif /* HAVE_SELINUX */
535: if (cs->tags.nopasswd != UNSPEC && cs->tags.nopasswd != tags.nopasswd)
536: printf("%sPASSWD: ", cs->tags.nopasswd ? "NO" : "");
537: if (cs->tags.noexec != UNSPEC && cs->tags.noexec != tags.noexec)
538: printf("%sEXEC: ", cs->tags.noexec ? "NO" : "");
539: print_member(cs->cmnd);
540: memcpy(&tags, &cs->tags, sizeof(tags));
1.1 millert 541: }
542: }
1.16 millert 543: }
1.1 millert 544:
1.16 millert 545: void
546: print_userspecs()
547: {
548: struct member *m;
549: struct userspec *us;
1.1 millert 550:
1.16 millert 551: tq_foreach_fwd(&userspecs, us) {
552: tq_foreach_fwd(&us->users, m) {
553: if (m != tq_first(&us->users))
554: fputs(", ", stdout);
555: print_member(m);
556: }
557: putchar('\t');
558: print_privilege(us->privileges.first); /* XXX */
559: putchar('\n');
560: }
561: }
1.1 millert 562:
1.16 millert 563: void
564: dump_sudoers()
565: {
566: print_defaults();
1.1 millert 567:
1.16 millert 568: putchar('\n');
569: alias_apply(print_alias, NULL);
1.1 millert 570:
1.16 millert 571: putchar('\n');
572: print_userspecs();
573: }
1.1 millert 574:
1.16 millert 575: void
576: usage()
577: {
578: (void) fprintf(stderr, "usage: %s [-d] [-G grfile] [-g group] [-h host] [-p pwfile] [-u user] <user> <command> [args]\n", getprogname());
579: exit(1);
1.1 millert 580: }
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