--- /dev/null
+/*
+ * Copyright (c) 1996, 1998-2005, 2007-2011
+ * Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#ifdef HAVE_FNMATCH
+# include <fnmatch.h>
+#endif /* HAVE_FNMATCH */
+#ifdef HAVE_EXTENDED_GLOB
+# include <glob.h>
+#endif /* HAVE_EXTENDED_GLOB */
+#ifdef HAVE_NETGROUP_H
+# include <netgroup.h>
+#endif /* HAVE_NETGROUP_H */
+#include <ctype.h>
+#include <pwd.h>
+#include <grp.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#ifdef HAVE_DIRENT_H
+# include <dirent.h>
+# define NAMLEN(dirent) strlen((dirent)->d_name)
+#else
+# define dirent direct
+# define NAMLEN(dirent) (dirent)->d_namlen
+# ifdef HAVE_SYS_NDIR_H
+# include <sys/ndir.h>
+# endif
+# ifdef HAVE_SYS_DIR_H
+# include <sys/dir.h>
+# endif
+# ifdef HAVE_NDIR_H
+# include <ndir.h>
+# endif
+#endif
+
+#include "sudoers.h"
+#include "interfaces.h"
+#include "parse.h"
+#include <gram.h>
+
+#ifndef HAVE_FNMATCH
+# include "compat/fnmatch.h"
+#endif /* HAVE_FNMATCH */
+#ifndef HAVE_EXTENDED_GLOB
+# include "compat/glob.h"
+#endif /* HAVE_EXTENDED_GLOB */
+
+static struct member_list empty;
+
+static int command_matches_dir(char *, size_t);
+static int command_matches_glob(char *, char *);
+static int command_matches_fnmatch(char *, char *);
+static int command_matches_normal(char *, char *);
+
+/*
+ * Returns TRUE if string 's' contains meta characters.
+ */
+#define has_meta(s) (strpbrk(s, "\\?*[]") != NULL)
+
+/*
+ * Check for user described by pw in a list of members.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+static int
+_userlist_matches(struct passwd *pw, struct member_list *list)
+{
+ struct member *m;
+ struct alias *a;
+ int rval, matched = UNSPEC;
+
+ tq_foreach_rev(list, m) {
+ switch (m->type) {
+ case ALL:
+ matched = !m->negated;
+ break;
+ case NETGROUP:
+ if (netgr_matches(m->name, NULL, NULL, pw->pw_name))
+ matched = !m->negated;
+ break;
+ case USERGROUP:
+ if (usergr_matches(m->name, pw->pw_name, pw))
+ matched = !m->negated;
+ break;
+ case ALIAS:
+ if ((a = alias_find(m->name, USERALIAS)) != NULL) {
+ rval = _userlist_matches(pw, &a->members);
+ if (rval != UNSPEC)
+ matched = m->negated ? !rval : rval;
+ break;
+ }
+ /* FALLTHROUGH */
+ case WORD:
+ if (userpw_matches(m->name, pw->pw_name, pw))
+ matched = !m->negated;
+ break;
+ }
+ if (matched != UNSPEC)
+ break;
+ }
+ return matched;
+}
+
+int
+userlist_matches(struct passwd *pw, struct member_list *list)
+{
+ alias_seqno++;
+ return _userlist_matches(pw, list);
+}
+
+/*
+ * Check for user described by pw in a list of members.
+ * If both lists are empty compare against def_runas_default.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+static int
+_runaslist_matches(struct member_list *user_list, struct member_list *group_list)
+{
+ struct member *m;
+ struct alias *a;
+ int rval;
+ int user_matched = UNSPEC;
+ int group_matched = UNSPEC;
+
+ if (runas_pw != NULL) {
+ /* If no runas user or runas group listed in sudoers, use default. */
+ if (tq_empty(user_list) && tq_empty(group_list))
+ return userpw_matches(def_runas_default, runas_pw->pw_name, runas_pw);
+
+ tq_foreach_rev(user_list, m) {
+ switch (m->type) {
+ case ALL:
+ user_matched = !m->negated;
+ break;
+ case NETGROUP:
+ if (netgr_matches(m->name, NULL, NULL, runas_pw->pw_name))
+ user_matched = !m->negated;
+ break;
+ case USERGROUP:
+ if (usergr_matches(m->name, runas_pw->pw_name, runas_pw))
+ user_matched = !m->negated;
+ break;
+ case ALIAS:
+ if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
+ rval = _runaslist_matches(&a->members, &empty);
+ if (rval != UNSPEC)
+ user_matched = m->negated ? !rval : rval;
+ break;
+ }
+ /* FALLTHROUGH */
+ case WORD:
+ if (userpw_matches(m->name, runas_pw->pw_name, runas_pw))
+ user_matched = !m->negated;
+ break;
+ }
+ if (user_matched != UNSPEC)
+ break;
+ }
+ }
+
+ if (runas_gr != NULL) {
+ if (user_matched == UNSPEC) {
+ if (runas_pw == NULL || strcmp(runas_pw->pw_name, user_name) == 0)
+ user_matched = ALLOW; /* only changing group */
+ }
+ tq_foreach_rev(group_list, m) {
+ switch (m->type) {
+ case ALL:
+ group_matched = !m->negated;
+ break;
+ case ALIAS:
+ if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
+ rval = _runaslist_matches(&a->members, &empty);
+ if (rval != UNSPEC)
+ group_matched = m->negated ? !rval : rval;
+ break;
+ }
+ /* FALLTHROUGH */
+ case WORD:
+ if (group_matches(m->name, runas_gr))
+ group_matched = !m->negated;
+ break;
+ }
+ if (group_matched != UNSPEC)
+ break;
+ }
+ }
+
+ if (user_matched == DENY || group_matched == DENY)
+ return DENY;
+ if (user_matched == group_matched || runas_gr == NULL)
+ return user_matched;
+ return UNSPEC;
+}
+
+int
+runaslist_matches(struct member_list *user_list, struct member_list *group_list)
+{
+ alias_seqno++;
+ return _runaslist_matches(user_list ? user_list : &empty,
+ group_list ? group_list : &empty);
+}
+
+/*
+ * Check for host and shost in a list of members.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+static int
+_hostlist_matches(struct member_list *list)
+{
+ struct member *m;
+ struct alias *a;
+ int rval, matched = UNSPEC;
+
+ tq_foreach_rev(list, m) {
+ switch (m->type) {
+ case ALL:
+ matched = !m->negated;
+ break;
+ case NETGROUP:
+ if (netgr_matches(m->name, user_host, user_shost, NULL))
+ matched = !m->negated;
+ break;
+ case NTWKADDR:
+ if (addr_matches(m->name))
+ matched = !m->negated;
+ break;
+ case ALIAS:
+ if ((a = alias_find(m->name, HOSTALIAS)) != NULL) {
+ rval = _hostlist_matches(&a->members);
+ if (rval != UNSPEC)
+ matched = m->negated ? !rval : rval;
+ break;
+ }
+ /* FALLTHROUGH */
+ case WORD:
+ if (hostname_matches(user_shost, user_host, m->name))
+ matched = !m->negated;
+ break;
+ }
+ if (matched != UNSPEC)
+ break;
+ }
+ return matched;
+}
+
+int
+hostlist_matches(struct member_list *list)
+{
+ alias_seqno++;
+ return _hostlist_matches(list);
+}
+
+/*
+ * Check for cmnd and args in a list of members.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+static int
+_cmndlist_matches(struct member_list *list)
+{
+ struct member *m;
+ int matched = UNSPEC;
+
+ tq_foreach_rev(list, m) {
+ matched = cmnd_matches(m);
+ if (matched != UNSPEC)
+ break;
+ }
+ return matched;
+}
+
+int
+cmndlist_matches(struct member_list *list)
+{
+ alias_seqno++;
+ return _cmndlist_matches(list);
+}
+
+/*
+ * Check cmnd and args.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+int
+cmnd_matches(struct member *m)
+{
+ struct alias *a;
+ struct sudo_command *c;
+ int rval, matched = UNSPEC;
+
+ switch (m->type) {
+ case ALL:
+ matched = !m->negated;
+ break;
+ case ALIAS:
+ alias_seqno++;
+ if ((a = alias_find(m->name, CMNDALIAS)) != NULL) {
+ rval = _cmndlist_matches(&a->members);
+ if (rval != UNSPEC)
+ matched = m->negated ? !rval : rval;
+ }
+ break;
+ case COMMAND:
+ c = (struct sudo_command *)m->name;
+ if (command_matches(c->cmnd, c->args))
+ matched = !m->negated;
+ break;
+ }
+ return matched;
+}
+
+static int
+command_args_match(sudoers_cmnd, sudoers_args)
+ char *sudoers_cmnd;
+ char *sudoers_args;
+{
+ int flags = 0;
+
+ /*
+ * If no args specified in sudoers, any user args are allowed.
+ * If the empty string is specified in sudoers, no user args are allowed.
+ */
+ if (!sudoers_args ||
+ (!user_args && sudoers_args && !strcmp("\"\"", sudoers_args)))
+ return TRUE;
+ /*
+ * If args are specified in sudoers, they must match the user args.
+ * If running as sudoedit, all args are assumed to be paths.
+ */
+ if (sudoers_args) {
+ /* For sudoedit, all args are assumed to be pathnames. */
+ if (strcmp(sudoers_cmnd, "sudoedit") == 0)
+ flags = FNM_PATHNAME;
+ if (fnmatch(sudoers_args, user_args ? user_args : "", flags) == 0)
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * If path doesn't end in /, return TRUE iff cmnd & path name the same inode;
+ * otherwise, return TRUE if user_cmnd names one of the inodes in path.
+ */
+int
+command_matches(char *sudoers_cmnd, char *sudoers_args)
+{
+ /* Check for pseudo-commands */
+ if (sudoers_cmnd[0] != '/') {
+ /*
+ * Return true if both sudoers_cmnd and user_cmnd are "sudoedit" 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 (strcmp(sudoers_cmnd, "sudoedit") != 0 ||
+ strcmp(user_cmnd, "sudoedit") != 0)
+ return FALSE;
+ if (command_args_match(sudoers_cmnd, sudoers_args)) {
+ efree(safe_cmnd);
+ safe_cmnd = estrdup(sudoers_cmnd);
+ return TRUE;
+ } else
+ return FALSE;
+ }
+
+ if (has_meta(sudoers_cmnd)) {
+ /*
+ * If sudoers_cmnd has meta characters in it, we need to
+ * use glob(3) and/or fnmatch(3) to do the matching.
+ */
+ if (def_fast_glob)
+ return command_matches_fnmatch(sudoers_cmnd, sudoers_args);
+ return command_matches_glob(sudoers_cmnd, sudoers_args);
+ }
+ return command_matches_normal(sudoers_cmnd, sudoers_args);
+}
+
+static int
+command_matches_fnmatch(char *sudoers_cmnd, char *sudoers_args)
+{
+ /*
+ * Return true if fnmatch(3) succeeds 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.
+ */
+ if (fnmatch(sudoers_cmnd, user_cmnd, FNM_PATHNAME) != 0)
+ return FALSE;
+ if (command_args_match(sudoers_cmnd, sudoers_args)) {
+ if (safe_cmnd)
+ free(safe_cmnd);
+ safe_cmnd = estrdup(user_cmnd);
+ return TRUE;
+ } else
+ return FALSE;
+}
+
+static int
+command_matches_glob(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 || gl.gl_pathc == 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 (command_args_match(sudoers_cmnd, sudoers_args)) {
+ efree(safe_cmnd);
+ safe_cmnd = estrdup(user_cmnd);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+static int
+command_matches_normal(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 (command_args_match(sudoers_cmnd, sudoers_args)) {
+ 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(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 == NULL ||
+ (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(char *n)
+{
+ union sudo_in_addr_un addr;
+ struct interface *ifp;
+#ifdef HAVE_IN6_ADDR
+ int j;
+#endif
+ int family;
+
+#ifdef HAVE_IN6_ADDR
+ if (inet_pton(AF_INET6, n, &addr.ip6) > 0) {
+ family = AF_INET6;
+ } else
+#endif
+ {
+ family = AF_INET;
+ addr.ip4.s_addr = inet_addr(n);
+ }
+
+ for (ifp = interfaces; ifp != NULL; ifp = ifp->next) {
+ if (ifp->family != family)
+ continue;
+ switch(family) {
+ case AF_INET:
+ if (ifp->addr.ip4.s_addr == addr.ip4.s_addr ||
+ (ifp->addr.ip4.s_addr & ifp->netmask.ip4.s_addr)
+ == addr.ip4.s_addr)
+ return TRUE;
+ break;
+#ifdef HAVE_IN6_ADDR
+ case AF_INET6:
+ if (memcmp(ifp->addr.ip6.s6_addr, addr.ip6.s6_addr,
+ sizeof(addr.ip6.s6_addr)) == 0)
+ return TRUE;
+ for (j = 0; j < sizeof(addr.ip6.s6_addr); j++) {
+ if ((ifp->addr.ip6.s6_addr[j] & ifp->netmask.ip6.s6_addr[j]) != addr.ip6.s6_addr[j])
+ break;
+ }
+ if (j == sizeof(addr.ip6.s6_addr))
+ return TRUE;
+#endif
+ }
+ }
+
+ return FALSE;
+}
+
+static int
+addr_matches_if_netmask(char *n, char *m)
+{
+ int i;
+ union sudo_in_addr_un addr, mask;
+ struct interface *ifp;
+#ifdef HAVE_IN6_ADDR
+ int j;
+#endif
+ int family;
+
+#ifdef HAVE_IN6_ADDR
+ if (inet_pton(AF_INET6, n, &addr.ip6) > 0)
+ family = AF_INET6;
+ else
+#endif
+ {
+ family = AF_INET;
+ addr.ip4.s_addr = inet_addr(n);
+ }
+
+ if (family == AF_INET) {
+ if (strchr(m, '.'))
+ mask.ip4.s_addr = inet_addr(m);
+ else {
+ i = 32 - atoi(m);
+ mask.ip4.s_addr = 0xffffffff;
+ mask.ip4.s_addr >>= i;
+ mask.ip4.s_addr <<= i;
+ mask.ip4.s_addr = htonl(mask.ip4.s_addr);
+ }
+ }
+#ifdef HAVE_IN6_ADDR
+ else {
+ if (inet_pton(AF_INET6, m, &mask.ip6) <= 0) {
+ j = atoi(m);
+ for (i = 0; i < 16; i++) {
+ if (j < i * 8)
+ mask.ip6.s6_addr[i] = 0;
+ else if (i * 8 + 8 <= j)
+ mask.ip6.s6_addr[i] = 0xff;
+ else
+ mask.ip6.s6_addr[i] = 0xff00 >> (j - i * 8);
+ }
+ }
+ }
+#endif /* HAVE_IN6_ADDR */
+
+ for (ifp = interfaces; ifp != NULL; ifp = ifp->next) {
+ if (ifp->family != family)
+ continue;
+ switch(family) {
+ case AF_INET:
+ if ((ifp->addr.ip4.s_addr & mask.ip4.s_addr) == addr.ip4.s_addr)
+ return TRUE;
+#ifdef HAVE_IN6_ADDR
+ case AF_INET6:
+ for (j = 0; j < sizeof(addr.ip6.s6_addr); j++) {
+ if ((ifp->addr.ip6.s6_addr[j] & mask.ip6.s6_addr[j]) != addr.ip6.s6_addr[j])
+ break;
+ }
+ if (j == sizeof(addr.ip6.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(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(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(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(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(char *group, char *user, struct passwd *pw)
+{
+ int matched = FALSE;
+ struct passwd *pw0 = NULL;
+
+ /* make sure we have a valid usergroup, sudo style */
+ if (*group++ != '%')
+ goto done;
+
+ if (*group == ':' && def_group_plugin) {
+ matched = group_plugin_query(user, group + 1, pw);
+ goto done;
+ }
+
+ /* look up user's primary gid in the passwd file */
+ if (pw == NULL) {
+ if ((pw0 = sudo_getpwnam(user)) == NULL)
+ goto done;
+ pw = pw0;
+ }
+
+ if (user_in_group(pw, group)) {
+ matched = TRUE;
+ goto done;
+ }
+
+ /* not a Unix group, could be an external group */
+ if (def_group_plugin && group_plugin_query(user, group, pw)) {
+ matched = TRUE;
+ goto done;
+ }
+
+done:
+ if (pw0 != NULL)
+ pw_delref(pw0);
+
+ return matched;
+}
+
+/*
+ * 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(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;
+}
projects / debian / sudo / blobdiff