Annotation of src/usr.bin/sudo/match.c, Revision 1.3
1.1 millert 1: /*
1.3 ! millert 2: * Copyright (c) 1996, 1998-2005, 2007-2009
1.1 millert 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: #include <config.h>
25:
26: #include <sys/types.h>
27: #include <sys/param.h>
28: #include <sys/socket.h>
29: #include <sys/stat.h>
30: #include <stdio.h>
31: #ifdef STDC_HEADERS
32: # include <stdlib.h>
33: # include <stddef.h>
34: #else
35: # ifdef HAVE_STDLIB_H
36: # include <stdlib.h>
37: # endif
38: #endif /* STDC_HEADERS */
39: #ifdef HAVE_STRING_H
40: # include <string.h>
41: #else
42: # ifdef HAVE_STRINGS_H
43: # include <strings.h>
44: # endif
45: #endif /* HAVE_STRING_H */
46: #ifdef HAVE_UNISTD_H
47: # include <unistd.h>
48: #endif /* HAVE_UNISTD_H */
49: #ifdef HAVE_FNMATCH
50: # include <fnmatch.h>
51: #endif /* HAVE_FNMATCH */
52: #ifdef HAVE_EXTENDED_GLOB
53: # include <glob.h>
54: #endif /* HAVE_EXTENDED_GLOB */
55: #ifdef HAVE_NETGROUP_H
56: # include <netgroup.h>
57: #endif /* HAVE_NETGROUP_H */
58: #include <ctype.h>
59: #include <pwd.h>
60: #include <grp.h>
61: #include <netinet/in.h>
62: #include <arpa/inet.h>
63: #include <netdb.h>
64: #ifdef HAVE_DIRENT_H
65: # include <dirent.h>
66: # define NAMLEN(dirent) strlen((dirent)->d_name)
67: #else
68: # define dirent direct
69: # define NAMLEN(dirent) (dirent)->d_namlen
70: # ifdef HAVE_SYS_NDIR_H
71: # include <sys/ndir.h>
72: # endif
73: # ifdef HAVE_SYS_DIR_H
74: # include <sys/dir.h>
75: # endif
76: # ifdef HAVE_NDIR_H
77: # include <ndir.h>
78: # endif
79: #endif
80:
81: #include "sudo.h"
82: #include "interfaces.h"
83: #include "parse.h"
84: #include <gram.h>
85:
86: #ifndef HAVE_FNMATCH
87: # include "emul/fnmatch.h"
88: #endif /* HAVE_FNMATCH */
89: #ifndef HAVE_EXTENDED_GLOB
90: # include "emul/glob.h"
91: #endif /* HAVE_EXTENDED_GLOB */
1.3 ! millert 92: #ifdef USING_NONUNIX_GROUPS
! 93: # include "nonunix.h"
! 94: #endif /* USING_NONUNIX_GROUPS */
1.1 millert 95:
96: #ifndef lint
1.3 ! millert 97: __unused static const char rcsid[] = "$Sudo: match.c,v 1.46 2009/05/27 00:49:07 millert Exp $";
1.1 millert 98: #endif /* lint */
99:
100: static struct member_list empty;
101:
102: static int command_matches_dir __P((char *, size_t));
1.2 millert 103: static int command_matches_glob __P((char *, char *));
104: static int command_matches_fnmatch __P((char *, char *));
105: static int command_matches_normal __P((char *, char *));
1.1 millert 106:
107: /*
108: * Returns TRUE if string 's' contains meta characters.
109: */
110: #define has_meta(s) (strpbrk(s, "\\?*[]") != NULL)
111:
112: /*
113: * Check for user described by pw in a list of members.
114: * Returns ALLOW, DENY or UNSPEC.
115: */
116: static int
117: _userlist_matches(pw, list)
118: struct passwd *pw;
119: struct member_list *list;
120: {
121: struct member *m;
122: struct alias *a;
123: int rval, matched = UNSPEC;
124:
125: tq_foreach_rev(list, m) {
126: switch (m->type) {
127: case ALL:
128: matched = !m->negated;
129: break;
130: case NETGROUP:
131: if (netgr_matches(m->name, NULL, NULL, pw->pw_name))
132: matched = !m->negated;
133: break;
134: case USERGROUP:
135: if (usergr_matches(m->name, pw->pw_name, pw))
136: matched = !m->negated;
137: break;
138: case ALIAS:
1.2 millert 139: if ((a = alias_find(m->name, USERALIAS)) != NULL) {
1.1 millert 140: rval = _userlist_matches(pw, &a->members);
141: if (rval != UNSPEC)
142: matched = m->negated ? !rval : rval;
143: break;
144: }
145: /* FALLTHROUGH */
146: case WORD:
147: if (userpw_matches(m->name, pw->pw_name, pw))
148: matched = !m->negated;
149: break;
150: }
151: if (matched != UNSPEC)
152: break;
153: }
154: return(matched);
155: }
156:
157: int
158: userlist_matches(pw, list)
159: struct passwd *pw;
160: struct member_list *list;
161: {
162: alias_seqno++;
163: return(_userlist_matches(pw, list));
164: }
165:
166: /*
167: * Check for user described by pw in a list of members.
168: * If both lists are empty compare against def_runas_default.
169: * Returns ALLOW, DENY or UNSPEC.
170: */
171: static int
172: _runaslist_matches(user_list, group_list)
173: struct member_list *user_list;
174: struct member_list *group_list;
175: {
176: struct member *m;
177: struct alias *a;
178: int rval, matched = UNSPEC;
179:
1.3 ! millert 180: if (runas_gr != NULL) {
! 181: if (tq_empty(group_list))
! 182: return(DENY); /* group was specified but none in sudoers */
! 183: if (runas_pw != NULL && strcmp(runas_pw->pw_name, user_name) &&
! 184: tq_empty(user_list))
! 185: return(DENY); /* user was specified but none in sudoers */
! 186: }
1.1 millert 187:
188: if (tq_empty(user_list) && tq_empty(group_list))
189: return(userpw_matches(def_runas_default, runas_pw->pw_name, runas_pw));
190:
191: if (runas_pw != NULL) {
192: tq_foreach_rev(user_list, m) {
193: switch (m->type) {
194: case ALL:
195: matched = !m->negated;
196: break;
197: case NETGROUP:
198: if (netgr_matches(m->name, NULL, NULL, runas_pw->pw_name))
199: matched = !m->negated;
200: break;
201: case USERGROUP:
202: if (usergr_matches(m->name, runas_pw->pw_name, runas_pw))
203: matched = !m->negated;
204: break;
205: case ALIAS:
1.2 millert 206: if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
1.1 millert 207: rval = _runaslist_matches(&a->members, &empty);
208: if (rval != UNSPEC)
209: matched = m->negated ? !rval : rval;
210: break;
211: }
212: /* FALLTHROUGH */
213: case WORD:
214: if (userpw_matches(m->name, runas_pw->pw_name, runas_pw))
215: matched = !m->negated;
216: break;
217: }
218: if (matched != UNSPEC)
219: break;
220: }
221: }
222:
223: if (runas_gr != NULL) {
224: tq_foreach_rev(group_list, m) {
225: switch (m->type) {
226: case ALL:
227: matched = !m->negated;
228: break;
229: case ALIAS:
1.2 millert 230: if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
1.1 millert 231: rval = _runaslist_matches(&a->members, &empty);
232: if (rval != UNSPEC)
233: matched = m->negated ? !rval : rval;
234: break;
235: }
236: /* FALLTHROUGH */
237: case WORD:
238: if (group_matches(m->name, runas_gr))
239: matched = !m->negated;
240: break;
241: }
242: if (matched != UNSPEC)
243: break;
244: }
245: }
246:
247: return(matched);
248: }
249:
250: int
251: runaslist_matches(user_list, group_list)
252: struct member_list *user_list;
253: struct member_list *group_list;
254: {
255: alias_seqno++;
256: return(_runaslist_matches(user_list ? user_list : &empty,
257: group_list ? group_list : &empty));
258: }
259:
260: /*
261: * Check for host and shost in a list of members.
262: * Returns ALLOW, DENY or UNSPEC.
263: */
264: static int
265: _hostlist_matches(list)
266: struct member_list *list;
267: {
268: struct member *m;
269: struct alias *a;
270: int rval, matched = UNSPEC;
271:
272: tq_foreach_rev(list, m) {
273: switch (m->type) {
274: case ALL:
275: matched = !m->negated;
276: break;
277: case NETGROUP:
278: if (netgr_matches(m->name, user_host, user_shost, NULL))
279: matched = !m->negated;
280: break;
281: case NTWKADDR:
282: if (addr_matches(m->name))
283: matched = !m->negated;
284: break;
285: case ALIAS:
1.2 millert 286: if ((a = alias_find(m->name, HOSTALIAS)) != NULL) {
1.1 millert 287: rval = _hostlist_matches(&a->members);
288: if (rval != UNSPEC)
289: matched = m->negated ? !rval : rval;
290: break;
291: }
292: /* FALLTHROUGH */
293: case WORD:
294: if (hostname_matches(user_shost, user_host, m->name))
295: matched = !m->negated;
296: break;
297: }
298: if (matched != UNSPEC)
299: break;
300: }
301: return(matched);
302: }
303:
304: int
305: hostlist_matches(list)
306: struct member_list *list;
307: {
308: alias_seqno++;
309: return(_hostlist_matches(list));
310: }
311:
312: /*
313: * Check for cmnd and args in a list of members.
314: * Returns ALLOW, DENY or UNSPEC.
315: */
316: static int
317: _cmndlist_matches(list)
318: struct member_list *list;
319: {
320: struct member *m;
321: int rval, matched = UNSPEC;
322:
323: tq_foreach_rev(list, m) {
324: rval = cmnd_matches(m);
325: if (rval != UNSPEC) {
326: matched = m->negated ? !rval : rval;
327: break;
328: }
329: }
330: return(matched);
331: }
332:
333: int
334: cmndlist_matches(list)
335: struct member_list *list;
336: {
337: alias_seqno++;
338: return(_cmndlist_matches(list));
339: }
340:
341: /*
342: * Check cmnd and args.
343: * Returns ALLOW, DENY or UNSPEC.
344: */
345: int
346: cmnd_matches(m)
347: struct member *m;
348: {
349: struct alias *a;
350: struct sudo_command *c;
351: int rval, matched = UNSPEC;
352:
353: switch (m->type) {
354: case ALL:
355: matched = !m->negated;
356: break;
357: case ALIAS:
358: alias_seqno++;
1.2 millert 359: if ((a = alias_find(m->name, CMNDALIAS)) != NULL) {
1.1 millert 360: rval = _cmndlist_matches(&a->members);
361: if (rval != UNSPEC)
362: matched = m->negated ? !rval : rval;
363: }
364: break;
365: case COMMAND:
366: c = (struct sudo_command *)m->name;
367: if (command_matches(c->cmnd, c->args))
368: matched = !m->negated;
369: break;
370: }
371: return(matched);
372: }
373:
374: /*
375: * If path doesn't end in /, return TRUE iff cmnd & path name the same inode;
376: * otherwise, return TRUE if user_cmnd names one of the inodes in path.
377: */
378: int
379: command_matches(sudoers_cmnd, sudoers_args)
380: char *sudoers_cmnd;
381: char *sudoers_args;
382: {
383: /* Check for pseudo-commands */
384: if (strchr(user_cmnd, '/') == NULL) {
385: /*
386: * Return true if both sudoers_cmnd and user_cmnd are "sudoedit" AND
387: * a) there are no args in sudoers OR
388: * b) there are no args on command line and none req by sudoers OR
389: * c) there are args in sudoers and on command line and they match
390: */
391: if (strcmp(sudoers_cmnd, "sudoedit") != 0 ||
392: strcmp(user_cmnd, "sudoedit") != 0)
393: return(FALSE);
394: if (!sudoers_args ||
395: (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
396: (sudoers_args &&
397: fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
398: efree(safe_cmnd);
399: safe_cmnd = estrdup(sudoers_cmnd);
400: return(TRUE);
401: } else
402: return(FALSE);
403: }
404:
405: if (has_meta(sudoers_cmnd)) {
406: /*
1.2 millert 407: * If sudoers_cmnd has meta characters in it, we need to
408: * use glob(3) and/or fnmatch(3) to do the matching.
1.1 millert 409: */
1.2 millert 410: if (def_fast_glob)
411: return(command_matches_fnmatch(sudoers_cmnd, sudoers_args));
412: return(command_matches_glob(sudoers_cmnd, sudoers_args));
413: }
414: return(command_matches_normal(sudoers_cmnd, sudoers_args));
415: }
416:
417: static int
418: command_matches_fnmatch(sudoers_cmnd, sudoers_args)
419: char *sudoers_cmnd;
420: char *sudoers_args;
421: {
422: /*
423: * Return true if fnmatch(3) succeeds AND
424: * a) there are no args in sudoers OR
425: * b) there are no args on command line and none required by sudoers OR
426: * c) there are args in sudoers and on command line and they match
427: * else return false.
428: */
429: if (fnmatch(sudoers_cmnd, user_cmnd, FNM_PATHNAME) != 0)
430: return(FALSE);
431: if (!sudoers_args ||
432: (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
433: (sudoers_args &&
434: fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
435: if (safe_cmnd)
436: free(safe_cmnd);
437: safe_cmnd = estrdup(user_cmnd);
438: return(TRUE);
439: } else
440: return(FALSE);
441: }
442:
443: static int
444: command_matches_glob(sudoers_cmnd, sudoers_args)
445: char *sudoers_cmnd;
446: char *sudoers_args;
447: {
448: struct stat sudoers_stat;
449: size_t dlen;
450: char **ap, *base, *cp;
451: glob_t gl;
452:
453: /*
454: * First check to see if we can avoid the call to glob(3).
455: * Short circuit if there are no meta chars in the command itself
456: * and user_base and basename(sudoers_cmnd) don't match.
457: */
458: dlen = strlen(sudoers_cmnd);
459: if (sudoers_cmnd[dlen - 1] != '/') {
460: if ((base = strrchr(sudoers_cmnd, '/')) != NULL) {
461: base++;
462: if (!has_meta(base) && strcmp(user_base, base) != 0)
463: return(FALSE);
1.1 millert 464: }
1.2 millert 465: }
466: /*
467: * Return true if we find a match in the glob(3) results AND
468: * a) there are no args in sudoers OR
469: * b) there are no args on command line and none required by sudoers OR
470: * c) there are args in sudoers and on command line and they match
471: * else return false.
472: */
1.1 millert 473: #define GLOB_FLAGS (GLOB_NOSORT | GLOB_MARK | GLOB_BRACE | GLOB_TILDE)
1.2 millert 474: if (glob(sudoers_cmnd, GLOB_FLAGS, NULL, &gl) != 0) {
1.1 millert 475: globfree(&gl);
476: return(FALSE);
1.2 millert 477: }
478: /* For each glob match, compare basename, st_dev and st_ino. */
479: for (ap = gl.gl_pathv; (cp = *ap) != NULL; ap++) {
1.1 millert 480: /* If it ends in '/' it is a directory spec. */
1.2 millert 481: dlen = strlen(cp);
482: if (cp[dlen - 1] == '/') {
483: if (command_matches_dir(cp, dlen))
484: return(TRUE);
485: continue;
486: }
1.1 millert 487:
1.2 millert 488: /* Only proceed if user_base and basename(cp) match */
489: if ((base = strrchr(cp, '/')) != NULL)
490: base++;
1.1 millert 491: else
1.2 millert 492: base = cp;
1.1 millert 493: if (strcmp(user_base, base) != 0 ||
1.2 millert 494: stat(cp, &sudoers_stat) == -1)
495: continue;
496: if (user_stat == NULL ||
497: (user_stat->st_dev == sudoers_stat.st_dev &&
498: user_stat->st_ino == sudoers_stat.st_ino)) {
1.1 millert 499: efree(safe_cmnd);
1.2 millert 500: safe_cmnd = estrdup(cp);
501: break;
1.1 millert 502: }
1.2 millert 503: }
504: globfree(&gl);
505: if (cp == NULL)
506: return(FALSE);
507:
508: if (!sudoers_args ||
509: (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
510: (sudoers_args &&
511: fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
512: efree(safe_cmnd);
513: safe_cmnd = estrdup(user_cmnd);
514: return(TRUE);
515: }
516: return(FALSE);
517: }
518:
519: static int
520: command_matches_normal(sudoers_cmnd, sudoers_args)
521: char *sudoers_cmnd;
522: char *sudoers_args;
523: {
524: struct stat sudoers_stat;
525: char *base;
526: size_t dlen;
527:
528: /* If it ends in '/' it is a directory spec. */
529: dlen = strlen(sudoers_cmnd);
530: if (sudoers_cmnd[dlen - 1] == '/')
531: return(command_matches_dir(sudoers_cmnd, dlen));
532:
533: /* Only proceed if user_base and basename(sudoers_cmnd) match */
534: if ((base = strrchr(sudoers_cmnd, '/')) == NULL)
535: base = sudoers_cmnd;
536: else
537: base++;
538: if (strcmp(user_base, base) != 0 ||
539: stat(sudoers_cmnd, &sudoers_stat) == -1)
540: return(FALSE);
541:
542: /*
543: * Return true if inode/device matches AND
544: * a) there are no args in sudoers OR
545: * b) there are no args on command line and none req by sudoers OR
546: * c) there are args in sudoers and on command line and they match
547: */
548: if (user_stat != NULL &&
549: (user_stat->st_dev != sudoers_stat.st_dev ||
550: user_stat->st_ino != sudoers_stat.st_ino))
1.1 millert 551: return(FALSE);
1.2 millert 552: if (!sudoers_args ||
553: (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
554: (sudoers_args &&
555: fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
556: efree(safe_cmnd);
557: safe_cmnd = estrdup(sudoers_cmnd);
558: return(TRUE);
1.1 millert 559: }
1.2 millert 560: return(FALSE);
1.1 millert 561: }
562:
563: /*
564: * Return TRUE if user_cmnd names one of the inodes in dir, else FALSE.
565: */
566: static int
567: command_matches_dir(sudoers_dir, dlen)
568: char *sudoers_dir;
569: size_t dlen;
570: {
571: struct stat sudoers_stat;
572: struct dirent *dent;
573: char buf[PATH_MAX];
574: DIR *dirp;
575:
576: /*
577: * Grot through directory entries, looking for user_base.
578: */
579: dirp = opendir(sudoers_dir);
580: if (dirp == NULL)
581: return(FALSE);
582:
583: if (strlcpy(buf, sudoers_dir, sizeof(buf)) >= sizeof(buf))
584: return(FALSE);
585: while ((dent = readdir(dirp)) != NULL) {
586: /* ignore paths > PATH_MAX (XXX - log) */
587: buf[dlen] = '\0';
588: if (strlcat(buf, dent->d_name, sizeof(buf)) >= sizeof(buf))
589: continue;
590:
591: /* only stat if basenames are the same */
592: if (strcmp(user_base, dent->d_name) != 0 ||
593: stat(buf, &sudoers_stat) == -1)
594: continue;
595: if (user_stat->st_dev == sudoers_stat.st_dev &&
596: user_stat->st_ino == sudoers_stat.st_ino) {
597: efree(safe_cmnd);
598: safe_cmnd = estrdup(buf);
599: break;
600: }
601: }
602:
603: closedir(dirp);
604: return(dent != NULL);
605: }
606:
607: static int
608: addr_matches_if(n)
609: char *n;
610: {
611: int i;
612: struct in_addr addr;
613: struct interface *ifp;
614: #ifdef HAVE_IN6_ADDR
615: struct in6_addr addr6;
616: int j;
617: #endif
618: int family;
619:
620: #ifdef HAVE_IN6_ADDR
621: if (inet_pton(AF_INET6, n, &addr6) > 0) {
622: family = AF_INET6;
623: } else
624: #endif
625: {
626: family = AF_INET;
627: addr.s_addr = inet_addr(n);
628: }
629:
630: for (i = 0; i < num_interfaces; i++) {
631: ifp = &interfaces[i];
632: if (ifp->family != family)
633: continue;
634: switch(family) {
635: case AF_INET:
636: if (ifp->addr.ip4.s_addr == addr.s_addr ||
637: (ifp->addr.ip4.s_addr & ifp->netmask.ip4.s_addr)
638: == addr.s_addr)
639: return(TRUE);
640: break;
641: #ifdef HAVE_IN6_ADDR
642: case AF_INET6:
643: if (memcmp(ifp->addr.ip6.s6_addr, addr6.s6_addr,
644: sizeof(addr6.s6_addr)) == 0)
645: return(TRUE);
646: for (j = 0; j < sizeof(addr6.s6_addr); j++) {
647: if ((ifp->addr.ip6.s6_addr[j] & ifp->netmask.ip6.s6_addr[j]) != addr6.s6_addr[j])
648: break;
649: }
650: if (j == sizeof(addr6.s6_addr))
651: return(TRUE);
652: #endif
653: }
654: }
655:
656: return(FALSE);
657: }
658:
659: static int
660: addr_matches_if_netmask(n, m)
661: char *n;
662: char *m;
663: {
664: int i;
665: struct in_addr addr, mask;
666: struct interface *ifp;
667: #ifdef HAVE_IN6_ADDR
668: struct in6_addr addr6, mask6;
669: int j;
670: #endif
671: int family;
672:
673: #ifdef HAVE_IN6_ADDR
674: if (inet_pton(AF_INET6, n, &addr6) > 0)
675: family = AF_INET6;
676: else
677: #endif
678: {
679: family = AF_INET;
680: addr.s_addr = inet_addr(n);
681: }
682:
683: if (family == AF_INET) {
684: if (strchr(m, '.'))
685: mask.s_addr = inet_addr(m);
686: else {
687: i = 32 - atoi(m);
688: mask.s_addr = 0xffffffff;
689: mask.s_addr >>= i;
690: mask.s_addr <<= i;
691: mask.s_addr = htonl(mask.s_addr);
692: }
693: }
694: #ifdef HAVE_IN6_ADDR
695: else {
696: if (inet_pton(AF_INET6, m, &mask6) <= 0) {
697: j = atoi(m);
698: for (i = 0; i < 16; i++) {
699: if (j < i * 8)
700: mask6.s6_addr[i] = 0;
701: else if (i * 8 + 8 <= j)
702: mask6.s6_addr[i] = 0xff;
703: else
704: mask6.s6_addr[i] = 0xff00 >> (j - i * 8);
705: }
706: }
707: }
708: #endif /* HAVE_IN6_ADDR */
709:
710: for (i = 0; i < num_interfaces; i++) {
711: ifp = &interfaces[i];
712: if (ifp->family != family)
713: continue;
714: switch(family) {
715: case AF_INET:
716: if ((ifp->addr.ip4.s_addr & mask.s_addr) == addr.s_addr)
717: return(TRUE);
718: #ifdef HAVE_IN6_ADDR
719: case AF_INET6:
720: for (j = 0; j < sizeof(addr6.s6_addr); j++) {
721: if ((ifp->addr.ip6.s6_addr[j] & mask6.s6_addr[j]) != addr6.s6_addr[j])
722: break;
723: }
724: if (j == sizeof(addr6.s6_addr))
725: return(TRUE);
726: #endif /* HAVE_IN6_ADDR */
727: }
728: }
729:
730: return(FALSE);
731: }
732:
733: /*
734: * Returns TRUE if "n" is one of our ip addresses or if
735: * "n" is a network that we are on, else returns FALSE.
736: */
737: int
738: addr_matches(n)
739: char *n;
740: {
741: char *m;
742: int retval;
743:
744: /* If there's an explicit netmask, use it. */
745: if ((m = strchr(n, '/'))) {
746: *m++ = '\0';
747: retval = addr_matches_if_netmask(n, m);
748: *(m - 1) = '/';
749: } else
750: retval = addr_matches_if(n);
751:
752: return(retval);
753: }
754:
755: /*
756: * Returns TRUE if the hostname matches the pattern, else FALSE
757: */
758: int
759: hostname_matches(shost, lhost, pattern)
760: char *shost;
761: char *lhost;
762: char *pattern;
763: {
764: if (has_meta(pattern)) {
765: if (strchr(pattern, '.'))
766: return(!fnmatch(pattern, lhost, FNM_CASEFOLD));
767: else
768: return(!fnmatch(pattern, shost, FNM_CASEFOLD));
769: } else {
770: if (strchr(pattern, '.'))
771: return(!strcasecmp(lhost, pattern));
772: else
773: return(!strcasecmp(shost, pattern));
774: }
775: }
776:
777: /*
778: * Returns TRUE if the user/uid from sudoers matches the specified user/uid,
779: * else returns FALSE.
780: */
781: int
782: userpw_matches(sudoers_user, user, pw)
783: char *sudoers_user;
784: char *user;
785: struct passwd *pw;
786: {
787: if (pw != NULL && *sudoers_user == '#') {
788: uid_t uid = (uid_t) atoi(sudoers_user + 1);
789: if (uid == pw->pw_uid)
790: return(TRUE);
791: }
792: return(strcmp(sudoers_user, user) == 0);
793: }
794:
795: /*
796: * Returns TRUE if the group/gid from sudoers matches the specified group/gid,
797: * else returns FALSE.
798: */
799: int
800: group_matches(sudoers_group, gr)
801: char *sudoers_group;
802: struct group *gr;
803: {
804: if (*sudoers_group == '#') {
805: gid_t gid = (gid_t) atoi(sudoers_group + 1);
806: if (gid == gr->gr_gid)
807: return(TRUE);
808: }
809: return(strcmp(gr->gr_name, sudoers_group) == 0);
810: }
811:
812: /*
813: * Returns TRUE if the given user belongs to the named group,
814: * else returns FALSE.
815: */
816: int
817: usergr_matches(group, user, pw)
818: char *group;
819: char *user;
820: struct passwd *pw;
821: {
1.3 ! millert 822: struct group *grp = NULL;
1.1 millert 823: char **cur;
824: int i;
825:
826: /* make sure we have a valid usergroup, sudo style */
827: if (*group++ != '%')
828: return(FALSE);
829:
1.3 ! millert 830: #ifdef USING_NONUNIX_GROUPS
! 831: if (*group == ':')
! 832: return(sudo_nonunix_groupcheck(++group, user, pw));
! 833: #endif /* USING_NONUNIX_GROUPS */
! 834:
1.1 millert 835: /* look up user's primary gid in the passwd file */
836: if (pw == NULL && (pw = sudo_getpwnam(user)) == NULL)
1.3 ! millert 837: goto try_supplementary;
1.1 millert 838:
1.3 ! millert 839: /* check against user's primary (passwd file) gid */
1.1 millert 840: if ((grp = sudo_getgrnam(group)) == NULL)
1.3 ! millert 841: goto try_supplementary;
1.1 millert 842: if (grp->gr_gid == pw->pw_gid)
843: return(TRUE);
844:
845: /*
846: * If we are matching the invoking or list user and that user has a
847: * supplementary group vector, check it first.
848: */
849: if (strcmp(user, list_pw ? list_pw->pw_name : user_name) == 0) {
850: for (i = 0; i < user_ngroups; i++)
851: if (grp->gr_gid == user_groups[i])
852: return(TRUE);
853: }
1.3 ! millert 854:
! 855: try_supplementary:
! 856: if (grp != NULL && grp->gr_mem != NULL) {
1.1 millert 857: for (cur = grp->gr_mem; *cur; cur++)
858: if (strcmp(*cur, user) == 0)
859: return(TRUE);
860: }
1.3 ! millert 861:
! 862: #ifdef USING_NONUNIX_GROUPS
! 863: /* not a Unix group, could be an AD group */
! 864: if (sudo_nonunix_groupcheck_available() &&
! 865: sudo_nonunix_groupcheck(group, user, pw))
! 866: return(TRUE);
! 867: #endif /* USING_NONUNIX_GROUPS */
1.1 millert 868:
869: return(FALSE);
870: }
871:
872: /*
873: * Returns TRUE if "host" and "user" belong to the netgroup "netgr",
874: * else return FALSE. Either of "host", "shost" or "user" may be NULL
875: * in which case that argument is not checked...
876: *
877: * XXX - swap order of host & shost
878: */
879: int
880: netgr_matches(netgr, lhost, shost, user)
881: char *netgr;
882: char *lhost;
883: char *shost;
884: char *user;
885: {
886: static char *domain;
887: #ifdef HAVE_GETDOMAINNAME
888: static int initialized;
889: #endif
890:
891: /* make sure we have a valid netgroup, sudo style */
892: if (*netgr++ != '+')
893: return(FALSE);
894:
895: #ifdef HAVE_GETDOMAINNAME
896: /* get the domain name (if any) */
897: if (!initialized) {
898: domain = (char *) emalloc(MAXHOSTNAMELEN + 1);
899: if (getdomainname(domain, MAXHOSTNAMELEN + 1) == -1 || *domain == '\0') {
900: efree(domain);
901: domain = NULL;
902: }
903: initialized = 1;
904: }
905: #endif /* HAVE_GETDOMAINNAME */
906:
907: #ifdef HAVE_INNETGR
908: if (innetgr(netgr, lhost, user, domain))
909: return(TRUE);
910: else if (lhost != shost && innetgr(netgr, shost, user, domain))
911: return(TRUE);
912: #endif /* HAVE_INNETGR */
913:
914: return(FALSE);
915: }
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