Annotation of src/usr.bin/sudo/testsudoers.c, Revision 1.19
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:
1.5 millert 73: /*
1.1 millert 74: * Globals
75: */
1.9 millert 76: int Argc, NewArgc;
1.1 millert 77: char **Argv, **NewArgv;
78: int num_interfaces;
79: struct interface *interfaces;
80: struct sudo_user sudo_user;
1.16 millert 81: struct passwd *list_pw;
82: extern int parse_error;
83:
84: /* passwd/group redirection for pwutil.c */
85: void (*my_setgrent) __P((void)) = setgrent;
86: void (*my_endgrent) __P((void)) = endgrent;
87: struct group *(*my_getgrnam) __P((const char *)) = getgrnam;
88: struct group *(*my_getgrgid) __P((gid_t)) = getgrgid;
89: void (*my_setpwent) __P((void)) = setpwent;
90: void (*my_endpwent) __P((void)) = endpwent;
91: struct passwd *(*my_getpwnam) __P((const char *)) = getpwnam;
92: struct passwd *(*my_getpwuid) __P((uid_t)) = getpwuid;
93:
94: /* For getopt(3) */
95: extern char *optarg;
96: extern int optind;
97:
1.17 millert 98: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
99: extern char *malloc_options;
100: #endif
101: #ifdef YYDEBUG
102: extern int yydebug;
103: #endif
104:
1.16 millert 105: int print_alias __P((void *, void *));
106: void dump_sudoers __P((void));
107: void print_defaults __P((void));
108: void print_privilege __P((struct privilege *));
109: void print_userspecs __P((void));
110: void usage __P((void)) __attribute__((__noreturn__));
111: void set_runasgr __P((char *));
112: void set_runaspw __P((char *));
113:
114: extern void ts_setgrfile __P((const char *));
115: extern void ts_setgrent __P((void));
116: extern void ts_endgrent __P((void));
117: extern struct group *ts_getgrent __P((void));
118: extern struct group *ts_getgrnam __P((const char *));
119: extern struct group *ts_getgrgid __P((gid_t));
120: extern void ts_setpwfile __P((const char *));
121: extern void ts_setpwent __P((void));
122: extern void ts_endpwent __P((void));
123: extern struct passwd *ts_getpwent __P((void));
124: extern struct passwd *ts_getpwnam __P((const char *));
125: extern struct passwd *ts_getpwuid __P((uid_t));
1.1 millert 126:
127: int
1.16 millert 128: main(argc, argv)
129: int argc;
130: char **argv;
1.1 millert 131: {
1.16 millert 132: struct cmndspec *cs;
133: struct privilege *priv;
134: struct userspec *us;
135: char *p, *grfile, *pwfile, *runas_group, *runas_user;
136: char hbuf[MAXHOSTNAMELEN + 1];
137: int ch, dflag, rval, matched;
1.17 millert 138:
139: #if defined(SUDO_DEVEL) && defined(__OpenBSD__)
140: malloc_options = "AFGJPR";
141: #endif
142: #ifdef YYDEBUG
1.16 millert 143: yydebug = 1;
144: #endif
1.11 millert 145:
1.16 millert 146: Argv = argv;
147: Argc = argc;
148:
149: dflag = 0;
150: grfile = pwfile = runas_group = runas_user = NULL;
151: while ((ch = getopt(argc, argv, "dg:G:h:p:u:")) != -1) {
152: switch (ch) {
153: case 'd':
154: dflag = 1;
155: break;
156: case 'h':
157: user_host = optarg;
158: break;
159: case 'G':
160: grfile = optarg;
161: break;
162: case 'g':
163: runas_group = optarg;
164: break;
165: case 'p':
166: pwfile = optarg;
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: NewArgc = argc;
179: NewArgv = argv;
180:
181: /* Set group/passwd file and init the cache. */
182: if (grfile) {
183: my_setgrent = ts_setgrent;
184: my_endgrent = ts_endgrent;
185: my_getgrnam = ts_getgrnam;
186: my_getgrgid = ts_getgrgid;
187: ts_setgrfile(grfile);
188: }
189: if (pwfile) {
190: my_setpwent = ts_setpwent;
191: my_endpwent = ts_endpwent;
192: my_getpwnam = ts_getpwnam;
193: my_getpwuid = ts_getpwuid;
194: ts_setpwfile(pwfile);
195: }
196: sudo_setpwent();
197: sudo_setgrent();
198:
199: if (argc < 2) {
200: if (!dflag)
201: usage();
202: if ((sudo_user.pw = sudo_getpwnam("nobody")) == NULL)
203: errorx(1, "no passwd entry for nobody!");
204: user_cmnd = user_base = "true";
205: } else {
206: if ((sudo_user.pw = sudo_getpwnam(*argv)) == NULL)
207: errorx(1, "no passwd entry for %s!", *argv);
208: user_cmnd = *++argv;
209: if ((p = strrchr(user_cmnd, '/')) != NULL)
210: user_base = p + 1;
211: else
212: user_base = user_cmnd;
213: NewArgc -= 2;
1.1 millert 214: }
215:
1.16 millert 216: if (user_host == NULL) {
217: if (gethostname(hbuf, sizeof(hbuf)) != 0)
218: error(1, "gethostname");
219: hbuf[sizeof(hbuf) - 1] = '\0';
220: user_host = hbuf;
221: }
222: if ((p = strchr(user_host, '.'))) {
223: *p = '\0';
224: user_shost = estrdup(user_host);
225: *p = '.';
1.1 millert 226: } else {
1.16 millert 227: user_shost = user_host;
1.1 millert 228: }
229:
1.16 millert 230: /* Fill in user_args from NewArgv. */
231: if (NewArgc > 1) {
232: char *to, **from;
233: size_t size, n;
1.13 millert 234:
1.16 millert 235: for (size = 0, from = NewArgv + 1; *from; from++)
236: size += strlen(*from) + 1;
1.13 millert 237:
1.16 millert 238: user_args = (char *) emalloc(size);
239: for (to = user_args, from = NewArgv + 1; *from; from++) {
240: n = strlcpy(to, *from, size - (to - user_args));
241: if (n >= size - (to - user_args))
242: errorx(1, "internal error, init_vars() overflow");
243: to += n;
244: *to++ = ' ';
1.13 millert 245: }
1.16 millert 246: *--to = '\0';
1.13 millert 247: }
248:
1.16 millert 249: /* Initialize default values. */
250: init_defaults();
251:
252: /* Load ip addr/mask for each interface. */
253: load_interfaces();
1.13 millert 254:
1.16 millert 255: /* Allocate space for data structures in the parser. */
256: init_parser("sudoers", 0);
1.13 millert 257:
1.16 millert 258: if (yyparse() != 0 || parse_error)
259: (void) fputs("Does not parse", stdout);
1.13 millert 260: else
1.16 millert 261: (void) fputs("Parses OK", stdout);
262:
263: if (!update_defaults(SETDEF_ALL))
264: (void) fputs(" (problem with defaults entries)", stdout);
265: puts(".");
266:
267: /*
268: * Set runas passwd/group entries based on command line or sudoers.
269: * Note that if runas_group was specified without runas_user we
270: * defer setting runas_pw so the match routines know to ignore it.
271: */
272: if (runas_group != NULL) {
273: set_runasgr(runas_group);
274: if (runas_user != NULL)
275: set_runaspw(runas_user);
276: } else
277: set_runaspw(runas_user ? runas_user : def_runas_default);
1.1 millert 278:
1.16 millert 279: if (dflag) {
280: (void) putchar('\n');
281: dump_sudoers();
282: if (argc < 2)
283: exit(0);
1.13 millert 284: }
1.1 millert 285:
1.16 millert 286: /* This loop must match the one in sudoers_lookup() */
287: printf("\nEntries for user %s:\n", user_name);
288: matched = UNSPEC;
289: tq_foreach_rev(&userspecs, us) {
290: if (userlist_matches(sudo_user.pw, &us->users) != ALLOW)
1.13 millert 291: continue;
1.16 millert 292: tq_foreach_rev(&us->privileges, priv) {
293: putchar('\n');
294: print_privilege(priv); /* XXX */
295: putchar('\n');
296: if (hostlist_matches(&priv->hostlist) == ALLOW) {
297: puts("\thost matched");
298: tq_foreach_rev(&priv->cmndlist, cs) {
299: if (runaslist_matches(&cs->runasuserlist,
300: &cs->runasgrouplist) == ALLOW) {
301: puts("\trunas matched");
302: rval = cmnd_matches(cs->cmnd);
303: if (rval != UNSPEC)
304: matched = rval;
305: printf("\tcmnd %s\n", rval == ALLOW ? "allowed" :
306: rval == DENY ? "denied" : "unmatched");
307: }
1.13 millert 308: }
1.16 millert 309: } else
310: puts("\thost unmatched");
1.13 millert 311: }
1.1 millert 312: }
1.16 millert 313: printf("\nCommand %s\n", matched == ALLOW ? "allowed" :
314: matched == DENY ? "denied" : "unmatched");
1.1 millert 315:
1.16 millert 316: exit(0);
1.13 millert 317: }
318:
1.16 millert 319: void
320: set_runaspw(user)
321: char *user;
1.13 millert 322: {
1.16 millert 323: if (*user == '#') {
324: if ((runas_pw = sudo_getpwuid(atoi(user + 1))) == NULL)
325: runas_pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);
1.4 millert 326: } else {
1.16 millert 327: if ((runas_pw = sudo_getpwnam(user)) == NULL)
328: errorx(1, "unknown user: %s", user);
1.4 millert 329: }
1.1 millert 330: }
331:
1.16 millert 332: void
333: set_runasgr(group)
334: char *group;
1.11 millert 335: {
1.16 millert 336: if (*group == '#') {
337: if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)
338: runas_gr = sudo_fakegrnam(group);
339: } else {
340: if ((runas_gr = sudo_getgrnam(group)) == NULL)
341: errorx(1, "unknown group: %s", group);
1.11 millert 342: }
343: }
344:
1.16 millert 345: void
346: sudo_setspent()
1.1 millert 347: {
1.16 millert 348: return;
1.1 millert 349: }
350:
1.16 millert 351: void
352: sudo_endspent()
1.1 millert 353: {
1.16 millert 354: return;
1.1 millert 355: }
356:
1.16 millert 357: char *
358: sudo_getepw(pw)
359: const struct passwd *pw;
1.2 millert 360: {
1.16 millert 361: return (pw->pw_passwd);
1.2 millert 362: }
363:
364: void
365: set_fqdn()
1.5 millert 366: {
367: return;
368: }
369:
1.16 millert 370: FILE *
1.18 millert 371: open_sudoers(path, isdir, keepopen)
1.16 millert 372: const char *path;
1.18 millert 373: int isdir;
1.16 millert 374: int *keepopen;
1.11 millert 375: {
1.16 millert 376: return(fopen(path, "r"));
1.11 millert 377: }
378:
1.5 millert 379: void
380: init_envtables()
1.1 millert 381: {
382: return;
383: }
384:
1.18 millert 385: int
1.16 millert 386: set_perms(perm)
387: int perm;
1.1 millert 388: {
1.18 millert 389: return(1);
1.16 millert 390: }
1.1 millert 391:
1.16 millert 392: void
393: cleanup(gotsignal)
394: int gotsignal;
395: {
396: if (!gotsignal) {
397: sudo_endpwent();
398: sudo_endgrent();
399: }
400: }
1.1 millert 401:
1.16 millert 402: void
403: print_member(m)
404: struct member *m;
405: {
406: struct sudo_command *c;
1.1 millert 407:
1.16 millert 408: if (m->negated)
409: putchar('!');
410: if (m->name == NULL)
411: fputs("ALL", stdout);
412: else if (m->type != COMMAND)
413: fputs(m->name, stdout);
414: else {
415: c = (struct sudo_command *) m->name;
416: printf("%s%s%s", c->cmnd, c->args ? " " : "",
417: c->args ? c->args : "");
1.1 millert 418: }
1.16 millert 419: }
1.1 millert 420:
1.16 millert 421: void
422: print_defaults()
423: {
424: struct defaults *d;
425: struct member *m;
1.1 millert 426:
1.16 millert 427: tq_foreach_fwd(&defaults, d) {
428: (void) fputs("Defaults", stdout);
429: switch (d->type) {
430: case DEFAULTS_HOST:
431: putchar('@');
432: break;
433: case DEFAULTS_USER:
434: putchar(':');
435: break;
436: case DEFAULTS_RUNAS:
437: putchar('>');
438: break;
439: case DEFAULTS_CMND:
440: putchar('!');
441: break;
442: }
443: tq_foreach_fwd(&d->binding, m) {
444: if (m != tq_first(&d->binding))
445: putchar(',');
446: print_member(m);
447: }
448: printf("\t%s%s", d->op == FALSE ? "!" : "", d->var);
449: if (d->val != NULL) {
450: printf("%c%s", d->op == TRUE ? '=' : d->op, d->val);
451: }
452: putchar('\n');
1.1 millert 453: }
1.16 millert 454: }
1.1 millert 455:
1.16 millert 456: int
457: print_alias(v1, v2)
458: void *v1, *v2;
459: {
460: struct alias *a = (struct alias *)v1;
461: struct member *m;
462: struct sudo_command *c;
463:
464: switch (a->type) {
465: case HOSTALIAS:
466: (void) printf("Host_Alias\t%s = ", a->name);
467: break;
468: case CMNDALIAS:
469: (void) printf("Cmnd_Alias\t%s = ", a->name);
470: break;
471: case USERALIAS:
472: (void) printf("User_Alias\t%s = ", a->name);
473: break;
474: case RUNASALIAS:
475: (void) printf("Runas_Alias\t%s = ", a->name);
476: break;
477: }
478: tq_foreach_fwd(&a->members, m) {
479: if (m != tq_first(&a->members))
480: fputs(", ", stdout);
481: if (m->type == COMMAND) {
482: c = (struct sudo_command *) m->name;
483: printf("%s%s%s", c->cmnd, c->args ? " " : "",
484: c->args ? c->args : "");
485: } else
486: fputs(m->name, stdout);
487: }
488: putchar('\n');
489: return(0);
490: }
1.1 millert 491:
1.16 millert 492: void
493: print_privilege(priv)
494: struct privilege *priv;
495: {
496: struct cmndspec *cs;
497: struct member *m;
498: struct privilege *p;
499: struct cmndtag tags;
500:
501: for (p = priv; p != NULL; p = p->next) {
502: if (p != priv)
503: fputs(" : ", stdout);
504: tq_foreach_fwd(&p->hostlist, m) {
505: if (m != tq_first(&p->hostlist))
506: fputs(", ", stdout);
507: print_member(m);
508: }
509: fputs(" = ", stdout);
510: tags.nopasswd = tags.noexec = UNSPEC;
511: tq_foreach_fwd(&p->cmndlist, cs) {
512: if (cs != tq_first(&p->cmndlist))
513: fputs(", ", stdout);
514: /* XXX - runasgrouplist too */
515: if (!tq_empty(&cs->runasuserlist)) {
516: fputs("(", stdout);
517: tq_foreach_fwd(&cs->runasuserlist, m) {
518: if (m != tq_first(&cs->runasuserlist))
519: fputs(", ", stdout);
520: print_member(m);
521: }
522: fputs(") ", stdout);
523: }
524: #ifdef HAVE_SELINUX
525: if (cs->role)
526: printf("ROLE=%s ", cs->role);
527: if (cs->type)
528: printf("TYPE=%s ", cs->type);
529: #endif /* HAVE_SELINUX */
530: if (cs->tags.nopasswd != UNSPEC && cs->tags.nopasswd != tags.nopasswd)
531: printf("%sPASSWD: ", cs->tags.nopasswd ? "NO" : "");
532: if (cs->tags.noexec != UNSPEC && cs->tags.noexec != tags.noexec)
533: printf("%sEXEC: ", cs->tags.noexec ? "NO" : "");
534: print_member(cs->cmnd);
535: memcpy(&tags, &cs->tags, sizeof(tags));
1.1 millert 536: }
537: }
1.16 millert 538: }
1.1 millert 539:
1.16 millert 540: void
541: print_userspecs()
542: {
543: struct member *m;
544: struct userspec *us;
1.1 millert 545:
1.16 millert 546: tq_foreach_fwd(&userspecs, us) {
547: tq_foreach_fwd(&us->users, m) {
548: if (m != tq_first(&us->users))
549: fputs(", ", stdout);
550: print_member(m);
551: }
552: putchar('\t');
553: print_privilege(us->privileges.first); /* XXX */
554: putchar('\n');
555: }
556: }
1.1 millert 557:
1.16 millert 558: void
559: dump_sudoers()
560: {
561: print_defaults();
1.1 millert 562:
1.16 millert 563: putchar('\n');
564: alias_apply(print_alias, NULL);
1.1 millert 565:
1.16 millert 566: putchar('\n');
567: print_userspecs();
568: }
1.1 millert 569:
1.16 millert 570: void
571: usage()
572: {
573: (void) fprintf(stderr, "usage: %s [-d] [-G grfile] [-g group] [-h host] [-p pwfile] [-u user] <user> <command> [args]\n", getprogname());
574: exit(1);
1.1 millert 575: }
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