Rework source layout in preparation for modular sudo.
This commit is contained in:
Todd C. Miller
887
plugins/sudoers/match.c
Normal file
887
plugins/sudoers/match.c
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@@ -0,0 +1,887 @@
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/*
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* Copyright (c) 1996, 1998-2005, 2007-2009
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* Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#ifdef HAVE_FNMATCH
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# include <fnmatch.h>
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#endif /* HAVE_FNMATCH */
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#ifdef HAVE_EXTENDED_GLOB
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# include <glob.h>
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#endif /* HAVE_EXTENDED_GLOB */
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#ifdef HAVE_NETGROUP_H
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# include <netgroup.h>
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#endif /* HAVE_NETGROUP_H */
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#include <ctype.h>
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#include <pwd.h>
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#include <grp.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#ifdef HAVE_DIRENT_H
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# include <dirent.h>
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# define NAMLEN(dirent) strlen((dirent)->d_name)
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#else
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# define dirent direct
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# define NAMLEN(dirent) (dirent)->d_namlen
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# ifdef HAVE_SYS_NDIR_H
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# include <sys/ndir.h>
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# endif
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# ifdef HAVE_SYS_DIR_H
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# include <sys/dir.h>
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# endif
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# ifdef HAVE_NDIR_H
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# include <ndir.h>
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# endif
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#endif
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#include "sudo.h"
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#include "interfaces.h"
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#include "parse.h"
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#include <gram.h>
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#ifndef HAVE_FNMATCH
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# include "emul/fnmatch.h"
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#endif /* HAVE_FNMATCH */
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#ifndef HAVE_EXTENDED_GLOB
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# include "emul/glob.h"
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#endif /* HAVE_EXTENDED_GLOB */
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#ifdef USING_NONUNIX_GROUPS
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# include "nonunix.h"
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#endif /* USING_NONUNIX_GROUPS */
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static struct member_list empty;
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static int command_matches_dir __P((char *, size_t));
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static int command_matches_glob __P((char *, char *));
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static int command_matches_fnmatch __P((char *, char *));
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static int command_matches_normal __P((char *, char *));
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/*
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* Returns TRUE if string 's' contains meta characters.
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*/
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#define has_meta(s) (strpbrk(s, "\\?*[]") != NULL)
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/*
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* Check for user described by pw in a list of members.
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* Returns ALLOW, DENY or UNSPEC.
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*/
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static int
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_userlist_matches(pw, list)
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struct passwd *pw;
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struct member_list *list;
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{
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struct member *m;
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struct alias *a;
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int rval, matched = UNSPEC;
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tq_foreach_rev(list, m) {
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switch (m->type) {
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case ALL:
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matched = !m->negated;
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break;
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case NETGROUP:
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if (netgr_matches(m->name, NULL, NULL, pw->pw_name))
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matched = !m->negated;
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break;
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case USERGROUP:
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if (usergr_matches(m->name, pw->pw_name, pw))
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matched = !m->negated;
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break;
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case ALIAS:
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if ((a = alias_find(m->name, USERALIAS)) != NULL) {
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rval = _userlist_matches(pw, &a->members);
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if (rval != UNSPEC)
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matched = m->negated ? !rval : rval;
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break;
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}
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/* FALLTHROUGH */
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case WORD:
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if (userpw_matches(m->name, pw->pw_name, pw))
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matched = !m->negated;
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break;
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}
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if (matched != UNSPEC)
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break;
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}
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return(matched);
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}
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int
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userlist_matches(pw, list)
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struct passwd *pw;
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struct member_list *list;
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{
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alias_seqno++;
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return(_userlist_matches(pw, list));
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}
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/*
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* Check for user described by pw in a list of members.
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* If both lists are empty compare against def_runas_default.
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* Returns ALLOW, DENY or UNSPEC.
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*/
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static int
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_runaslist_matches(user_list, group_list)
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struct member_list *user_list;
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struct member_list *group_list;
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{
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struct member *m;
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struct alias *a;
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int rval, matched = UNSPEC;
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if (runas_gr != NULL) {
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if (tq_empty(group_list))
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return(DENY); /* group was specified but none in sudoers */
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if (runas_pw != NULL && strcmp(runas_pw->pw_name, user_name) &&
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tq_empty(user_list))
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return(DENY); /* user was specified but none in sudoers */
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}
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if (tq_empty(user_list) && tq_empty(group_list))
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return(userpw_matches(def_runas_default, runas_pw->pw_name, runas_pw));
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if (runas_pw != NULL) {
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tq_foreach_rev(user_list, m) {
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switch (m->type) {
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case ALL:
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matched = !m->negated;
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break;
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case NETGROUP:
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if (netgr_matches(m->name, NULL, NULL, runas_pw->pw_name))
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matched = !m->negated;
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break;
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case USERGROUP:
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if (usergr_matches(m->name, runas_pw->pw_name, runas_pw))
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matched = !m->negated;
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break;
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case ALIAS:
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if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
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rval = _runaslist_matches(&a->members, &empty);
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if (rval != UNSPEC)
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matched = m->negated ? !rval : rval;
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break;
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}
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/* FALLTHROUGH */
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case WORD:
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if (userpw_matches(m->name, runas_pw->pw_name, runas_pw))
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matched = !m->negated;
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break;
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}
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if (matched != UNSPEC)
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break;
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}
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}
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if (runas_gr != NULL) {
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tq_foreach_rev(group_list, m) {
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switch (m->type) {
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case ALL:
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matched = !m->negated;
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break;
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case ALIAS:
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if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
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rval = _runaslist_matches(&a->members, &empty);
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if (rval != UNSPEC)
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matched = m->negated ? !rval : rval;
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break;
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}
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/* FALLTHROUGH */
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case WORD:
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if (group_matches(m->name, runas_gr))
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matched = !m->negated;
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break;
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}
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if (matched != UNSPEC)
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break;
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}
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}
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return(matched);
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}
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int
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runaslist_matches(user_list, group_list)
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struct member_list *user_list;
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struct member_list *group_list;
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{
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alias_seqno++;
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return(_runaslist_matches(user_list ? user_list : &empty,
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group_list ? group_list : &empty));
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}
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/*
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* Check for host and shost in a list of members.
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* Returns ALLOW, DENY or UNSPEC.
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*/
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static int
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_hostlist_matches(list)
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struct member_list *list;
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{
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struct member *m;
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struct alias *a;
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int rval, matched = UNSPEC;
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tq_foreach_rev(list, m) {
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switch (m->type) {
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case ALL:
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matched = !m->negated;
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break;
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case NETGROUP:
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if (netgr_matches(m->name, user_host, user_shost, NULL))
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matched = !m->negated;
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break;
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case NTWKADDR:
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if (addr_matches(m->name))
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matched = !m->negated;
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break;
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case ALIAS:
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if ((a = alias_find(m->name, HOSTALIAS)) != NULL) {
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rval = _hostlist_matches(&a->members);
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if (rval != UNSPEC)
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matched = m->negated ? !rval : rval;
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break;
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}
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/* FALLTHROUGH */
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case WORD:
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if (hostname_matches(user_shost, user_host, m->name))
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matched = !m->negated;
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break;
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}
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if (matched != UNSPEC)
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break;
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}
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return(matched);
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}
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int
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hostlist_matches(list)
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struct member_list *list;
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{
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alias_seqno++;
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return(_hostlist_matches(list));
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}
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/*
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* Check for cmnd and args in a list of members.
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* Returns ALLOW, DENY or UNSPEC.
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*/
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static int
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_cmndlist_matches(list)
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struct member_list *list;
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{
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struct member *m;
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int matched = UNSPEC;
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tq_foreach_rev(list, m) {
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matched = cmnd_matches(m);
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if (matched != UNSPEC)
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break;
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}
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return(matched);
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}
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int
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cmndlist_matches(list)
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struct member_list *list;
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{
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alias_seqno++;
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return(_cmndlist_matches(list));
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}
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/*
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* Check cmnd and args.
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* Returns ALLOW, DENY or UNSPEC.
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*/
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int
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cmnd_matches(m)
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struct member *m;
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{
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struct alias *a;
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struct sudo_command *c;
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int rval, matched = UNSPEC;
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switch (m->type) {
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case ALL:
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matched = !m->negated;
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break;
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case ALIAS:
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alias_seqno++;
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if ((a = alias_find(m->name, CMNDALIAS)) != NULL) {
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rval = _cmndlist_matches(&a->members);
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if (rval != UNSPEC)
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matched = m->negated ? !rval : rval;
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}
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break;
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case COMMAND:
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c = (struct sudo_command *)m->name;
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if (command_matches(c->cmnd, c->args))
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matched = !m->negated;
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break;
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}
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return(matched);
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}
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/*
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* If path doesn't end in /, return TRUE iff cmnd & path name the same inode;
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* otherwise, return TRUE if user_cmnd names one of the inodes in path.
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*/
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int
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command_matches(sudoers_cmnd, sudoers_args)
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char *sudoers_cmnd;
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char *sudoers_args;
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{
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/* Check for pseudo-commands */
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if (strchr(user_cmnd, '/') == NULL) {
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/*
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* Return true if both sudoers_cmnd and user_cmnd are "sudoedit" AND
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* a) there are no args in sudoers OR
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* b) there are no args on command line and none req by sudoers OR
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* c) there are args in sudoers and on command line and they match
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*/
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if (strcmp(sudoers_cmnd, "sudoedit") != 0 ||
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strcmp(user_cmnd, "sudoedit") != 0)
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return(FALSE);
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if (!sudoers_args ||
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(!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
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(sudoers_args &&
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fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
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efree(safe_cmnd);
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safe_cmnd = estrdup(sudoers_cmnd);
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return(TRUE);
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} else
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return(FALSE);
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}
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|
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if (has_meta(sudoers_cmnd)) {
|
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/*
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* If sudoers_cmnd has meta characters in it, we need to
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* use glob(3) and/or fnmatch(3) to do the matching.
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*/
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if (def_fast_glob)
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return(command_matches_fnmatch(sudoers_cmnd, sudoers_args));
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return(command_matches_glob(sudoers_cmnd, sudoers_args));
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}
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return(command_matches_normal(sudoers_cmnd, sudoers_args));
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}
|
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static int
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command_matches_fnmatch(sudoers_cmnd, sudoers_args)
|
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char *sudoers_cmnd;
|
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char *sudoers_args;
|
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{
|
||||
/*
|
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* Return true if fnmatch(3) succeeds AND
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* a) there are no args in sudoers OR
|
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* b) there are no args on command line and none required by sudoers OR
|
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* c) there are args in sudoers and on command line and they match
|
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* else return false.
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*/
|
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if (fnmatch(sudoers_cmnd, user_cmnd, FNM_PATHNAME) != 0)
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return(FALSE);
|
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if (!sudoers_args ||
|
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(!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
|
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(sudoers_args &&
|
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fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
|
||||
if (safe_cmnd)
|
||||
free(safe_cmnd);
|
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safe_cmnd = estrdup(user_cmnd);
|
||||
return(TRUE);
|
||||
} else
|
||||
return(FALSE);
|
||||
}
|
||||
|
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static int
|
||||
command_matches_glob(sudoers_cmnd, sudoers_args)
|
||||
char *sudoers_cmnd;
|
||||
char *sudoers_args;
|
||||
{
|
||||
struct stat sudoers_stat;
|
||||
size_t dlen;
|
||||
char **ap, *base, *cp;
|
||||
glob_t gl;
|
||||
|
||||
/*
|
||||
* First check to see if we can avoid the call to glob(3).
|
||||
* Short circuit if there are no meta chars in the command itself
|
||||
* and user_base and basename(sudoers_cmnd) don't match.
|
||||
*/
|
||||
dlen = strlen(sudoers_cmnd);
|
||||
if (sudoers_cmnd[dlen - 1] != '/') {
|
||||
if ((base = strrchr(sudoers_cmnd, '/')) != NULL) {
|
||||
base++;
|
||||
if (!has_meta(base) && strcmp(user_base, base) != 0)
|
||||
return(FALSE);
|
||||
}
|
||||
}
|
||||
/*
|
||||
* Return true if we find a match in the glob(3) results AND
|
||||
* a) there are no args in sudoers OR
|
||||
* b) there are no args on command line and none required by sudoers OR
|
||||
* c) there are args in sudoers and on command line and they match
|
||||
* else return false.
|
||||
*/
|
||||
#define GLOB_FLAGS (GLOB_NOSORT | GLOB_MARK | GLOB_BRACE | GLOB_TILDE)
|
||||
if (glob(sudoers_cmnd, GLOB_FLAGS, NULL, &gl) != 0) {
|
||||
globfree(&gl);
|
||||
return(FALSE);
|
||||
}
|
||||
/* For each glob match, compare basename, st_dev and st_ino. */
|
||||
for (ap = gl.gl_pathv; (cp = *ap) != NULL; ap++) {
|
||||
/* If it ends in '/' it is a directory spec. */
|
||||
dlen = strlen(cp);
|
||||
if (cp[dlen - 1] == '/') {
|
||||
if (command_matches_dir(cp, dlen))
|
||||
return(TRUE);
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Only proceed if user_base and basename(cp) match */
|
||||
if ((base = strrchr(cp, '/')) != NULL)
|
||||
base++;
|
||||
else
|
||||
base = cp;
|
||||
if (strcmp(user_base, base) != 0 ||
|
||||
stat(cp, &sudoers_stat) == -1)
|
||||
continue;
|
||||
if (user_stat == NULL ||
|
||||
(user_stat->st_dev == sudoers_stat.st_dev &&
|
||||
user_stat->st_ino == sudoers_stat.st_ino)) {
|
||||
efree(safe_cmnd);
|
||||
safe_cmnd = estrdup(cp);
|
||||
break;
|
||||
}
|
||||
}
|
||||
globfree(&gl);
|
||||
if (cp == NULL)
|
||||
return(FALSE);
|
||||
|
||||
if (!sudoers_args ||
|
||||
(!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
|
||||
(sudoers_args &&
|
||||
fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
|
||||
efree(safe_cmnd);
|
||||
safe_cmnd = estrdup(user_cmnd);
|
||||
return(TRUE);
|
||||
}
|
||||
return(FALSE);
|
||||
}
|
||||
|
||||
static int
|
||||
command_matches_normal(sudoers_cmnd, sudoers_args)
|
||||
char *sudoers_cmnd;
|
||||
char *sudoers_args;
|
||||
{
|
||||
struct stat sudoers_stat;
|
||||
char *base;
|
||||
size_t dlen;
|
||||
|
||||
/* If it ends in '/' it is a directory spec. */
|
||||
dlen = strlen(sudoers_cmnd);
|
||||
if (sudoers_cmnd[dlen - 1] == '/')
|
||||
return(command_matches_dir(sudoers_cmnd, dlen));
|
||||
|
||||
/* Only proceed if user_base and basename(sudoers_cmnd) match */
|
||||
if ((base = strrchr(sudoers_cmnd, '/')) == NULL)
|
||||
base = sudoers_cmnd;
|
||||
else
|
||||
base++;
|
||||
if (strcmp(user_base, base) != 0 ||
|
||||
stat(sudoers_cmnd, &sudoers_stat) == -1)
|
||||
return(FALSE);
|
||||
|
||||
/*
|
||||
* Return true if inode/device matches AND
|
||||
* a) there are no args in sudoers OR
|
||||
* b) there are no args on command line and none req by sudoers OR
|
||||
* c) there are args in sudoers and on command line and they match
|
||||
*/
|
||||
if (user_stat != NULL &&
|
||||
(user_stat->st_dev != sudoers_stat.st_dev ||
|
||||
user_stat->st_ino != sudoers_stat.st_ino))
|
||||
return(FALSE);
|
||||
if (!sudoers_args ||
|
||||
(!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)) ||
|
||||
(sudoers_args &&
|
||||
fnmatch(sudoers_args, user_args ? user_args : "", 0) == 0)) {
|
||||
efree(safe_cmnd);
|
||||
safe_cmnd = estrdup(sudoers_cmnd);
|
||||
return(TRUE);
|
||||
}
|
||||
return(FALSE);
|
||||
}
|
||||
|
||||
/*
|
||||
* Return TRUE if user_cmnd names one of the inodes in dir, else FALSE.
|
||||
*/
|
||||
static int
|
||||
command_matches_dir(sudoers_dir, dlen)
|
||||
char *sudoers_dir;
|
||||
size_t dlen;
|
||||
{
|
||||
struct stat sudoers_stat;
|
||||
struct dirent *dent;
|
||||
char buf[PATH_MAX];
|
||||
DIR *dirp;
|
||||
|
||||
/*
|
||||
* Grot through directory entries, looking for user_base.
|
||||
*/
|
||||
dirp = opendir(sudoers_dir);
|
||||
if (dirp == NULL)
|
||||
return(FALSE);
|
||||
|
||||
if (strlcpy(buf, sudoers_dir, sizeof(buf)) >= sizeof(buf)) {
|
||||
closedir(dirp);
|
||||
return(FALSE);
|
||||
}
|
||||
while ((dent = readdir(dirp)) != NULL) {
|
||||
/* ignore paths > PATH_MAX (XXX - log) */
|
||||
buf[dlen] = '\0';
|
||||
if (strlcat(buf, dent->d_name, sizeof(buf)) >= sizeof(buf))
|
||||
continue;
|
||||
|
||||
/* only stat if basenames are the same */
|
||||
if (strcmp(user_base, dent->d_name) != 0 ||
|
||||
stat(buf, &sudoers_stat) == -1)
|
||||
continue;
|
||||
if (user_stat->st_dev == sudoers_stat.st_dev &&
|
||||
user_stat->st_ino == sudoers_stat.st_ino) {
|
||||
efree(safe_cmnd);
|
||||
safe_cmnd = estrdup(buf);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
closedir(dirp);
|
||||
return(dent != NULL);
|
||||
}
|
||||
|
||||
static int
|
||||
addr_matches_if(n)
|
||||
char *n;
|
||||
{
|
||||
int i;
|
||||
struct in_addr addr;
|
||||
struct interface *ifp;
|
||||
#ifdef HAVE_IN6_ADDR
|
||||
struct in6_addr addr6;
|
||||
int j;
|
||||
#endif
|
||||
int family;
|
||||
|
||||
#ifdef HAVE_IN6_ADDR
|
||||
if (inet_pton(AF_INET6, n, &addr6) > 0) {
|
||||
family = AF_INET6;
|
||||
} else
|
||||
#endif
|
||||
{
|
||||
family = AF_INET;
|
||||
addr.s_addr = inet_addr(n);
|
||||
}
|
||||
|
||||
for (i = 0; i < num_interfaces; i++) {
|
||||
ifp = &interfaces[i];
|
||||
if (ifp->family != family)
|
||||
continue;
|
||||
switch(family) {
|
||||
case AF_INET:
|
||||
if (ifp->addr.ip4.s_addr == addr.s_addr ||
|
||||
(ifp->addr.ip4.s_addr & ifp->netmask.ip4.s_addr)
|
||||
== addr.s_addr)
|
||||
return(TRUE);
|
||||
break;
|
||||
#ifdef HAVE_IN6_ADDR
|
||||
case AF_INET6:
|
||||
if (memcmp(ifp->addr.ip6.s6_addr, addr6.s6_addr,
|
||||
sizeof(addr6.s6_addr)) == 0)
|
||||
return(TRUE);
|
||||
for (j = 0; j < sizeof(addr6.s6_addr); j++) {
|
||||
if ((ifp->addr.ip6.s6_addr[j] & ifp->netmask.ip6.s6_addr[j]) != addr6.s6_addr[j])
|
||||
break;
|
||||
}
|
||||
if (j == sizeof(addr6.s6_addr))
|
||||
return(TRUE);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
return(FALSE);
|
||||
}
|
||||
|
||||
static int
|
||||
addr_matches_if_netmask(n, m)
|
||||
char *n;
|
||||
char *m;
|
||||
{
|
||||
int i;
|
||||
struct in_addr addr, mask;
|
||||
struct interface *ifp;
|
||||
#ifdef HAVE_IN6_ADDR
|
||||
struct in6_addr addr6, mask6;
|
||||
int j;
|
||||
#endif
|
||||
int family;
|
||||
|
||||
#ifdef HAVE_IN6_ADDR
|
||||
if (inet_pton(AF_INET6, n, &addr6) > 0)
|
||||
family = AF_INET6;
|
||||
else
|
||||
#endif
|
||||
{
|
||||
family = AF_INET;
|
||||
addr.s_addr = inet_addr(n);
|
||||
}
|
||||
|
||||
if (family == AF_INET) {
|
||||
if (strchr(m, '.'))
|
||||
mask.s_addr = inet_addr(m);
|
||||
else {
|
||||
i = 32 - atoi(m);
|
||||
mask.s_addr = 0xffffffff;
|
||||
mask.s_addr >>= i;
|
||||
mask.s_addr <<= i;
|
||||
mask.s_addr = htonl(mask.s_addr);
|
||||
}
|
||||
}
|
||||
#ifdef HAVE_IN6_ADDR
|
||||
else {
|
||||
if (inet_pton(AF_INET6, m, &mask6) <= 0) {
|
||||
j = atoi(m);
|
||||
for (i = 0; i < 16; i++) {
|
||||
if (j < i * 8)
|
||||
mask6.s6_addr[i] = 0;
|
||||
else if (i * 8 + 8 <= j)
|
||||
mask6.s6_addr[i] = 0xff;
|
||||
else
|
||||
mask6.s6_addr[i] = 0xff00 >> (j - i * 8);
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif /* HAVE_IN6_ADDR */
|
||||
|
||||
for (i = 0; i < num_interfaces; i++) {
|
||||
ifp = &interfaces[i];
|
||||
if (ifp->family != family)
|
||||
continue;
|
||||
switch(family) {
|
||||
case AF_INET:
|
||||
if ((ifp->addr.ip4.s_addr & mask.s_addr) == addr.s_addr)
|
||||
return(TRUE);
|
||||
#ifdef HAVE_IN6_ADDR
|
||||
case AF_INET6:
|
||||
for (j = 0; j < sizeof(addr6.s6_addr); j++) {
|
||||
if ((ifp->addr.ip6.s6_addr[j] & mask6.s6_addr[j]) != addr6.s6_addr[j])
|
||||
break;
|
||||
}
|
||||
if (j == sizeof(addr6.s6_addr))
|
||||
return(TRUE);
|
||||
#endif /* HAVE_IN6_ADDR */
|
||||
}
|
||||
}
|
||||
|
||||
return(FALSE);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns TRUE if "n" is one of our ip addresses or if
|
||||
* "n" is a network that we are on, else returns FALSE.
|
||||
*/
|
||||
int
|
||||
addr_matches(n)
|
||||
char *n;
|
||||
{
|
||||
char *m;
|
||||
int retval;
|
||||
|
||||
/* If there's an explicit netmask, use it. */
|
||||
if ((m = strchr(n, '/'))) {
|
||||
*m++ = '\0';
|
||||
retval = addr_matches_if_netmask(n, m);
|
||||
*(m - 1) = '/';
|
||||
} else
|
||||
retval = addr_matches_if(n);
|
||||
|
||||
return(retval);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns TRUE if the hostname matches the pattern, else FALSE
|
||||
*/
|
||||
int
|
||||
hostname_matches(shost, lhost, pattern)
|
||||
char *shost;
|
||||
char *lhost;
|
||||
char *pattern;
|
||||
{
|
||||
if (has_meta(pattern)) {
|
||||
if (strchr(pattern, '.'))
|
||||
return(!fnmatch(pattern, lhost, FNM_CASEFOLD));
|
||||
else
|
||||
return(!fnmatch(pattern, shost, FNM_CASEFOLD));
|
||||
} else {
|
||||
if (strchr(pattern, '.'))
|
||||
return(!strcasecmp(lhost, pattern));
|
||||
else
|
||||
return(!strcasecmp(shost, pattern));
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns TRUE if the user/uid from sudoers matches the specified user/uid,
|
||||
* else returns FALSE.
|
||||
*/
|
||||
int
|
||||
userpw_matches(sudoers_user, user, pw)
|
||||
char *sudoers_user;
|
||||
char *user;
|
||||
struct passwd *pw;
|
||||
{
|
||||
if (pw != NULL && *sudoers_user == '#') {
|
||||
uid_t uid = (uid_t) atoi(sudoers_user + 1);
|
||||
if (uid == pw->pw_uid)
|
||||
return(TRUE);
|
||||
}
|
||||
return(strcmp(sudoers_user, user) == 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns TRUE if the group/gid from sudoers matches the specified group/gid,
|
||||
* else returns FALSE.
|
||||
*/
|
||||
int
|
||||
group_matches(sudoers_group, gr)
|
||||
char *sudoers_group;
|
||||
struct group *gr;
|
||||
{
|
||||
if (*sudoers_group == '#') {
|
||||
gid_t gid = (gid_t) atoi(sudoers_group + 1);
|
||||
if (gid == gr->gr_gid)
|
||||
return(TRUE);
|
||||
}
|
||||
return(strcmp(gr->gr_name, sudoers_group) == 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns TRUE if the given user belongs to the named group,
|
||||
* else returns FALSE.
|
||||
*/
|
||||
int
|
||||
usergr_matches(group, user, pw)
|
||||
char *group;
|
||||
char *user;
|
||||
struct passwd *pw;
|
||||
{
|
||||
/* make sure we have a valid usergroup, sudo style */
|
||||
if (*group++ != '%')
|
||||
return(FALSE);
|
||||
|
||||
#ifdef USING_NONUNIX_GROUPS
|
||||
if (*group == ':')
|
||||
return(sudo_nonunix_groupcheck(++group, user, pw));
|
||||
#endif /* USING_NONUNIX_GROUPS */
|
||||
|
||||
/* look up user's primary gid in the passwd file */
|
||||
if (pw == NULL && (pw = sudo_getpwnam(user)) == NULL)
|
||||
return(FALSE);
|
||||
|
||||
if (user_in_group(pw, group))
|
||||
return(TRUE);
|
||||
|
||||
#ifdef USING_NONUNIX_GROUPS
|
||||
/* not a Unix group, could be an AD group */
|
||||
if (sudo_nonunix_groupcheck_available() &&
|
||||
sudo_nonunix_groupcheck(group, user, pw))
|
||||
return(TRUE);
|
||||
#endif /* USING_NONUNIX_GROUPS */
|
||||
|
||||
return(FALSE);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns TRUE if "host" and "user" belong to the netgroup "netgr",
|
||||
* else return FALSE. Either of "host", "shost" or "user" may be NULL
|
||||
* in which case that argument is not checked...
|
||||
*
|
||||
* XXX - swap order of host & shost
|
||||
*/
|
||||
int
|
||||
netgr_matches(netgr, lhost, shost, user)
|
||||
char *netgr;
|
||||
char *lhost;
|
||||
char *shost;
|
||||
char *user;
|
||||
{
|
||||
static char *domain;
|
||||
#ifdef HAVE_GETDOMAINNAME
|
||||
static int initialized;
|
||||
#endif
|
||||
|
||||
/* make sure we have a valid netgroup, sudo style */
|
||||
if (*netgr++ != '+')
|
||||
return(FALSE);
|
||||
|
||||
#ifdef HAVE_GETDOMAINNAME
|
||||
/* get the domain name (if any) */
|
||||
if (!initialized) {
|
||||
domain = (char *) emalloc(MAXHOSTNAMELEN + 1);
|
||||
if (getdomainname(domain, MAXHOSTNAMELEN + 1) == -1 || *domain == '\0') {
|
||||
efree(domain);
|
||||
domain = NULL;
|
||||
}
|
||||
initialized = 1;
|
||||
}
|
||||
#endif /* HAVE_GETDOMAINNAME */
|
||||
|
||||
#ifdef HAVE_INNETGR
|
||||
if (innetgr(netgr, lhost, user, domain))
|
||||
return(TRUE);
|
||||
else if (lhost != shost && innetgr(netgr, shost, user, domain))
|
||||
return(TRUE);
|
||||
#endif /* HAVE_INNETGR */
|
||||
|
||||
return(FALSE);
|
||||
}
|
||||
Reference in New Issue
Block a user