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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:37:38 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:37:38 +0000
commitae581a19fbe896a797450b9d9573fb66f2735227 (patch)
tree56c40be8518a29c9351364d13a9676aa83932dc0 /plugins/sudoers/match.c
parentInitial commit. (diff)
downloadsudo-ae581a19fbe896a797450b9d9573fb66f2735227.tar.xz
sudo-ae581a19fbe896a797450b9d9573fb66f2735227.zip
Adding upstream version 1.9.13p3.upstream/1.9.13p3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'plugins/sudoers/match.c')
-rw-r--r--plugins/sudoers/match.c709
1 files changed, 709 insertions, 0 deletions
diff --git a/plugins/sudoers/match.c b/plugins/sudoers/match.c
new file mode 100644
index 0000000..445bdb2
--- /dev/null
+++ b/plugins/sudoers/match.c
@@ -0,0 +1,709 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 1996, 1998-2005, 2007-2023
+ * Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <sys/stat.h>
+#ifdef HAVE_SYS_SYSTEMINFO_H
+# include <sys/systeminfo.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <unistd.h>
+#ifdef HAVE_NETGROUP_H
+# include <netgroup.h>
+#else
+# include <netdb.h>
+#endif /* HAVE_NETGROUP_H */
+#include <dirent.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <grp.h>
+#include <errno.h>
+#ifdef HAVE_FNMATCH
+# include <fnmatch.h>
+#else
+# include "compat/fnmatch.h"
+#endif /* HAVE_FNMATCH */
+
+#include "sudoers.h"
+#include <gram.h>
+
+static struct member_list empty = TAILQ_HEAD_INITIALIZER(empty);
+
+/*
+ * Check whether user described by pw matches member.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+int
+user_matches(struct sudoers_parse_tree *parse_tree, const struct passwd *pw,
+ const struct member *m)
+{
+ const char *lhost = parse_tree->lhost ? parse_tree->lhost : user_runhost;
+ const char *shost = parse_tree->shost ? parse_tree->shost : user_srunhost;
+ int matched = UNSPEC;
+ struct alias *a;
+ debug_decl(user_matches, SUDOERS_DEBUG_MATCH);
+
+ switch (m->type) {
+ case ALL:
+ matched = !m->negated;
+ break;
+ case NETGROUP:
+ if (netgr_matches(m->name,
+ def_netgroup_tuple ? lhost : NULL,
+ def_netgroup_tuple ? shost : 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_get(parse_tree, m->name, USERALIAS)) != NULL) {
+ /* XXX */
+ int rc = userlist_matches(parse_tree, pw, &a->members);
+ if (rc != UNSPEC)
+ matched = m->negated ? !rc : rc;
+ alias_put(a);
+ break;
+ }
+ FALLTHROUGH;
+ case WORD:
+ if (userpw_matches(m->name, pw->pw_name, pw))
+ matched = !m->negated;
+ break;
+ }
+ debug_return_int(matched);
+}
+
+/*
+ * Check for user described by pw in a list of members.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+int
+userlist_matches(struct sudoers_parse_tree *parse_tree, const struct passwd *pw,
+ const struct member_list *list)
+{
+ struct member *m;
+ int matched = UNSPEC;
+ debug_decl(userlist_matches, SUDOERS_DEBUG_MATCH);
+
+ TAILQ_FOREACH_REVERSE(m, list, member_list, entries) {
+ if ((matched = user_matches(parse_tree, pw, m)) != UNSPEC)
+ break;
+ }
+ debug_return_int(matched);
+}
+
+struct gid_list *
+runas_getgroups(void)
+{
+ const struct passwd *pw;
+ debug_decl(runas_getgroups, SUDOERS_DEBUG_MATCH);
+
+ if (def_preserve_groups) {
+ sudo_gidlist_addref(user_gid_list);
+ debug_return_ptr(user_gid_list);
+ }
+
+ /* Only use results from a group db query, not the front end. */
+ pw = runas_pw ? runas_pw : sudo_user.pw;
+ debug_return_ptr(sudo_get_gidlist(pw, ENTRY_TYPE_QUERIED));
+}
+
+/*
+ * 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.
+ */
+int
+runaslist_matches(struct sudoers_parse_tree *parse_tree,
+ const struct member_list *user_list, const struct member_list *group_list,
+ struct member **matching_user, struct member **matching_group)
+{
+ const char *lhost = parse_tree->lhost ? parse_tree->lhost : user_runhost;
+ const char *shost = parse_tree->shost ? parse_tree->shost : user_srunhost;
+ int user_matched = UNSPEC;
+ int group_matched = UNSPEC;
+ struct member *m;
+ struct alias *a;
+ int rc;
+ debug_decl(runaslist_matches, SUDOERS_DEBUG_MATCH);
+
+ if (ISSET(sudo_user.flags, RUNAS_USER_SPECIFIED) || !ISSET(sudo_user.flags, RUNAS_GROUP_SPECIFIED)) {
+ /* If no runas user or runas group listed in sudoers, use default. */
+ if (user_list == NULL && group_list == NULL) {
+ debug_return_int(userpw_matches(def_runas_default,
+ runas_pw->pw_name, runas_pw));
+ }
+
+ if (user_list != NULL) {
+ TAILQ_FOREACH_REVERSE(m, user_list, member_list, entries) {
+ switch (m->type) {
+ case ALL:
+ user_matched = !m->negated;
+ break;
+ case NETGROUP:
+ if (netgr_matches(m->name,
+ def_netgroup_tuple ? lhost : NULL,
+ def_netgroup_tuple ? shost : 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:
+ a = alias_get(parse_tree, m->name, RUNASALIAS);
+ if (a != NULL) {
+ rc = runaslist_matches(parse_tree, &a->members,
+ &empty, matching_user, NULL);
+ if (rc != UNSPEC)
+ user_matched = m->negated ? !rc : rc;
+ alias_put(a);
+ break;
+ }
+ FALLTHROUGH;
+ case WORD:
+ if (userpw_matches(m->name, runas_pw->pw_name, runas_pw))
+ user_matched = !m->negated;
+ break;
+ case MYSELF:
+ if (!ISSET(sudo_user.flags, RUNAS_USER_SPECIFIED) ||
+ strcmp(user_name, runas_pw->pw_name) == 0)
+ user_matched = !m->negated;
+ break;
+ }
+ if (user_matched != UNSPEC) {
+ if (matching_user != NULL && m->type != ALIAS)
+ *matching_user = m;
+ break;
+ }
+ }
+ }
+ }
+
+ /*
+ * Skip checking runas group if none was specified.
+ */
+ if (ISSET(sudo_user.flags, RUNAS_GROUP_SPECIFIED)) {
+ if (user_matched == UNSPEC) {
+ if (strcmp(user_name, runas_pw->pw_name) == 0)
+ user_matched = ALLOW; /* only changing group */
+ }
+ if (group_list != NULL) {
+ TAILQ_FOREACH_REVERSE(m, group_list, member_list, entries) {
+ switch (m->type) {
+ case ALL:
+ group_matched = !m->negated;
+ break;
+ case ALIAS:
+ a = alias_get(parse_tree, m->name, RUNASALIAS);
+ if (a != NULL) {
+ rc = runaslist_matches(parse_tree, &empty,
+ &a->members, NULL, matching_group);
+ if (rc != UNSPEC)
+ group_matched = m->negated ? !rc : rc;
+ alias_put(a);
+ break;
+ }
+ FALLTHROUGH;
+ case WORD:
+ if (group_matches(m->name, runas_gr))
+ group_matched = !m->negated;
+ break;
+ }
+ if (group_matched != UNSPEC) {
+ if (matching_group != NULL && m->type != ALIAS)
+ *matching_group = m;
+ break;
+ }
+ }
+ }
+ if (group_matched == UNSPEC) {
+ struct gid_list *runas_groups;
+ /*
+ * The runas group was not explicitly allowed by sudoers.
+ * Check whether it is one of the target user's groups.
+ */
+ if (runas_pw->pw_gid == runas_gr->gr_gid) {
+ group_matched = ALLOW; /* runas group matches passwd db */
+ } else if ((runas_groups = runas_getgroups()) != NULL) {
+ int i;
+
+ for (i = 0; i < runas_groups->ngids; i++) {
+ if (runas_groups->gids[i] == runas_gr->gr_gid) {
+ group_matched = ALLOW; /* matched aux group vector */
+ break;
+ }
+ }
+ sudo_gidlist_delref(runas_groups);
+ }
+ }
+ }
+
+ if (user_matched == DENY || group_matched == DENY)
+ debug_return_int(DENY);
+ if (user_matched == group_matched || runas_gr == NULL)
+ debug_return_int(user_matched);
+ debug_return_int(UNSPEC);
+}
+
+/*
+ * Check for lhost and shost in a list of members.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+static int
+hostlist_matches_int(struct sudoers_parse_tree *parse_tree,
+ const struct passwd *pw, const char *lhost, const char *shost,
+ const struct member_list *list)
+{
+ struct member *m;
+ int matched = UNSPEC;
+ debug_decl(hostlist_matches, SUDOERS_DEBUG_MATCH);
+
+ TAILQ_FOREACH_REVERSE(m, list, member_list, entries) {
+ matched = host_matches(parse_tree, pw, lhost, shost, m);
+ if (matched != UNSPEC)
+ break;
+ }
+ debug_return_int(matched);
+}
+
+/*
+ * Check for user_runhost and user_srunhost in a list of members.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+int
+hostlist_matches(struct sudoers_parse_tree *parse_tree, const struct passwd *pw,
+ const struct member_list *list)
+{
+ const char *lhost = parse_tree->lhost ? parse_tree->lhost : user_runhost;
+ const char *shost = parse_tree->shost ? parse_tree->shost : user_srunhost;
+
+ return hostlist_matches_int(parse_tree, pw, lhost, shost, list);
+}
+
+/*
+ * Check whether host or shost matches member.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+int
+host_matches(struct sudoers_parse_tree *parse_tree, const struct passwd *pw,
+ const char *lhost, const char *shost, const struct member *m)
+{
+ struct alias *a;
+ int matched = UNSPEC;
+ debug_decl(host_matches, SUDOERS_DEBUG_MATCH);
+
+ switch (m->type) {
+ case ALL:
+ matched = !m->negated;
+ break;
+ case NETGROUP:
+ if (netgr_matches(m->name, lhost, shost,
+ def_netgroup_tuple ? pw->pw_name : NULL))
+ matched = !m->negated;
+ break;
+ case NTWKADDR:
+ if (addr_matches(m->name))
+ matched = !m->negated;
+ break;
+ case ALIAS:
+ a = alias_get(parse_tree, m->name, HOSTALIAS);
+ if (a != NULL) {
+ /* XXX */
+ int rc = hostlist_matches_int(parse_tree, pw, lhost, shost,
+ &a->members);
+ if (rc != UNSPEC)
+ matched = m->negated ? !rc : rc;
+ alias_put(a);
+ break;
+ }
+ FALLTHROUGH;
+ case WORD:
+ if (hostname_matches(shost, lhost, m->name))
+ matched = !m->negated;
+ break;
+ }
+ sudo_debug_printf(SUDO_DEBUG_DEBUG,
+ "host %s (%s) matches sudoers host %s%s: %s", lhost, shost,
+ m->negated ? "!" : "", m->name ? m->name : "ALL",
+ matched == true ? "true" : "false");
+ debug_return_int(matched);
+}
+
+/*
+ * Check for cmnd and args in a list of members.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+int
+cmndlist_matches(struct sudoers_parse_tree *parse_tree,
+ const struct member_list *list, const char *runchroot,
+ struct cmnd_info *info)
+{
+ struct member *m;
+ int matched = UNSPEC;
+ debug_decl(cmndlist_matches, SUDOERS_DEBUG_MATCH);
+
+ TAILQ_FOREACH_REVERSE(m, list, member_list, entries) {
+ matched = cmnd_matches(parse_tree, m, runchroot, info);
+ if (matched != UNSPEC)
+ break;
+ }
+ debug_return_int(matched);
+}
+
+/*
+ * Check cmnd and args.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+int
+cmnd_matches(struct sudoers_parse_tree *parse_tree, const struct member *m,
+ const char *runchroot, struct cmnd_info *info)
+{
+ struct alias *a;
+ struct sudo_command *c;
+ int rc, matched = UNSPEC;
+ debug_decl(cmnd_matches, SUDOERS_DEBUG_MATCH);
+
+ switch (m->type) {
+ case ALL:
+ case COMMAND:
+ c = (struct sudo_command *)m->name;
+ if (command_matches(c->cmnd, c->args, runchroot, info, &c->digests))
+ matched = !m->negated;
+ break;
+ case ALIAS:
+ a = alias_get(parse_tree, m->name, CMNDALIAS);
+ if (a != NULL) {
+ rc = cmndlist_matches(parse_tree, &a->members, runchroot, info);
+ if (rc != UNSPEC)
+ matched = m->negated ? !rc : rc;
+ alias_put(a);
+ }
+ break;
+ }
+ debug_return_int(matched);
+}
+
+/*
+ * Like cmnd_matches() but only matches against the ALL command.
+ * Returns ALLOW, DENY or UNSPEC.
+ */
+int
+cmnd_matches_all(struct sudoers_parse_tree *parse_tree, const struct member *m,
+ const char *runchroot, struct cmnd_info *info)
+{
+ const bool negated = m->negated;
+ struct sudo_command *c;
+ int matched = UNSPEC;
+ struct alias *a;
+ debug_decl(cmnd_matches_all, SUDOERS_DEBUG_MATCH);
+
+ switch (m->type) {
+ case ALL:
+ c = (struct sudo_command *)m->name;
+ if (command_matches(c->cmnd, c->args, runchroot, info, &c->digests))
+ matched = !negated;
+ break;
+ case ALIAS:
+ a = alias_get(parse_tree, m->name, CMNDALIAS);
+ if (a != NULL) {
+ TAILQ_FOREACH_REVERSE(m, &a->members, member_list, entries) {
+ matched = cmnd_matches_all(parse_tree, m, runchroot, info);
+ if (matched != UNSPEC) {
+ if (negated)
+ matched = !matched;
+ break;
+ }
+ }
+ alias_put(a);
+ }
+ break;
+ }
+ debug_return_int(matched);
+}
+
+/*
+ * Returns true if the hostname matches the pattern, else false
+ */
+bool
+hostname_matches(const char *shost, const char *lhost, const char *pattern)
+{
+ const char *host;
+ bool rc;
+ debug_decl(hostname_matches, SUDOERS_DEBUG_MATCH);
+
+ host = strchr(pattern, '.') != NULL ? lhost : shost;
+ if (has_meta(pattern)) {
+ rc = !fnmatch(pattern, host, FNM_CASEFOLD);
+ } else {
+ rc = !strcasecmp(host, pattern);
+ }
+ debug_return_bool(rc);
+}
+
+/*
+ * Returns true if the user/uid from sudoers matches the specified user/uid,
+ * else returns false.
+ */
+bool
+userpw_matches(const char *sudoers_user, const char *user, const struct passwd *pw)
+{
+ const char *errstr;
+ uid_t uid;
+ bool rc;
+ debug_decl(userpw_matches, SUDOERS_DEBUG_MATCH);
+
+ if (pw != NULL && *sudoers_user == '#') {
+ uid = (uid_t) sudo_strtoid(sudoers_user + 1, &errstr);
+ if (errstr == NULL && uid == pw->pw_uid) {
+ rc = true;
+ goto done;
+ }
+ }
+ if (def_case_insensitive_user)
+ rc = strcasecmp(sudoers_user, user) == 0;
+ else
+ rc = strcmp(sudoers_user, user) == 0;
+done:
+ sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
+ "user %s matches sudoers user %s: %s",
+ user, sudoers_user, rc ? "true" : "false");
+ debug_return_bool(rc);
+}
+
+/*
+ * Returns true if the group/gid from sudoers matches the specified group/gid,
+ * else returns false.
+ */
+bool
+group_matches(const char *sudoers_group, const struct group *gr)
+{
+ const char *errstr;
+ gid_t gid;
+ bool rc;
+ debug_decl(group_matches, SUDOERS_DEBUG_MATCH);
+
+ if (*sudoers_group == '#') {
+ gid = (gid_t) sudo_strtoid(sudoers_group + 1, &errstr);
+ if (errstr == NULL && gid == gr->gr_gid) {
+ rc = true;
+ goto done;
+ }
+ }
+ if (def_case_insensitive_group)
+ rc = strcasecmp(sudoers_group, gr->gr_name) == 0;
+ else
+ rc = strcmp(sudoers_group, gr->gr_name) == 0;
+done:
+ sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
+ "group %s matches sudoers group %s: %s",
+ gr->gr_name, sudoers_group, rc ? "true" : "false");
+ debug_return_bool(rc);
+}
+
+/*
+ * Returns true if the given user belongs to the named group,
+ * else returns false.
+ */
+bool
+usergr_matches(const char *group, const char *user, const struct passwd *pw)
+{
+ bool matched = false;
+ struct passwd *pw0 = NULL;
+ debug_decl(usergr_matches, SUDOERS_DEBUG_MATCH);
+
+ /* Make sure we have a valid usergroup, sudo style */
+ if (*group++ != '%') {
+ sudo_debug_printf(SUDO_DEBUG_DIAG, "user group %s has no leading '%%'",
+ group);
+ goto done;
+ }
+
+ /* Query group plugin for %:name groups. */
+ if (*group == ':' && def_group_plugin) {
+ if (group_plugin_query(user, group + 1, pw) == true)
+ matched = true;
+ goto done;
+ }
+
+ /* Look up user's primary gid in the passwd file. */
+ if (pw == NULL) {
+ if ((pw0 = sudo_getpwnam(user)) == NULL) {
+ sudo_debug_printf(SUDO_DEBUG_DIAG, "unable to find %s in passwd db",
+ user);
+ goto done;
+ }
+ pw = pw0;
+ }
+
+ if (user_in_group(pw, group)) {
+ matched = true;
+ goto done;
+ }
+
+ /* Query the group plugin for Unix groups too? */
+ if (def_group_plugin && def_always_query_group_plugin) {
+ if (group_plugin_query(user, group, pw) == true) {
+ matched = true;
+ goto done;
+ }
+ }
+
+done:
+ if (pw0 != NULL)
+ sudo_pw_delref(pw0);
+
+ sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
+ "user %s matches group %s: %s", user, group, matched ? "true" : "false");
+ debug_return_bool(matched);
+}
+
+#if defined(HAVE_GETDOMAINNAME) || defined(SI_SRPC_DOMAIN)
+/*
+ * Check the domain for invalid characters.
+ * Linux getdomainname(2) returns (none) if no domain is set.
+ */
+static bool
+valid_domain(const char *domain)
+{
+ const char *cp;
+ debug_decl(valid_domain, SUDOERS_DEBUG_MATCH);
+
+ for (cp = domain; *cp != '\0'; cp++) {
+ /* Check for illegal characters, Linux may use "(none)". */
+ if (*cp == '(' || *cp == ')' || *cp == ',' || *cp == ' ')
+ break;
+ }
+ if (cp == domain || *cp != '\0')
+ debug_return_bool(false);
+ debug_return_bool(true);
+}
+
+/*
+ * Get NIS-style domain name and copy from static storage or NULL if none.
+ */
+const char *
+sudo_getdomainname(void)
+{
+ static char *domain;
+ static bool initialized;
+ debug_decl(sudo_getdomainname, SUDOERS_DEBUG_MATCH);
+
+ if (!initialized) {
+ size_t host_name_max;
+ int rc;
+
+# ifdef _SC_HOST_NAME_MAX
+ host_name_max = (size_t)sysconf(_SC_HOST_NAME_MAX);
+ if (host_name_max == (size_t)-1)
+# endif
+ host_name_max = 255; /* POSIX and historic BSD */
+
+ domain = malloc(host_name_max + 1);
+ if (domain != NULL) {
+ domain[0] = '\0';
+# ifdef SI_SRPC_DOMAIN
+ rc = sysinfo(SI_SRPC_DOMAIN, domain, host_name_max + 1);
+# else
+ rc = getdomainname(domain, host_name_max + 1);
+# endif
+ if (rc == -1 || !valid_domain(domain)) {
+ /* Error or invalid domain name. */
+ free(domain);
+ domain = NULL;
+ }
+ } else {
+ /* XXX - want to pass error back to caller */
+ sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
+ "unable to allocate memory");
+ }
+ initialized = true;
+ }
+ debug_return_str(domain);
+}
+#else
+const char *
+sudo_getdomainname(void)
+{
+ debug_decl(sudo_getdomainname, SUDOERS_DEBUG_MATCH);
+ debug_return_ptr(NULL);
+}
+#endif /* HAVE_GETDOMAINNAME || SI_SRPC_DOMAIN */
+
+/*
+ * Returns true if "host" and "user" belong to the netgroup "netgr",
+ * else return false. Either of "lhost", "shost" or "user" may be NULL
+ * in which case that argument is not checked...
+ */
+bool
+netgr_matches(const char *netgr, const char *lhost, const char *shost, const char *user)
+{
+#ifdef HAVE_INNETGR
+ const char *domain;
+#endif
+ bool rc = false;
+ debug_decl(netgr_matches, SUDOERS_DEBUG_MATCH);
+
+ if (!def_use_netgroups) {
+ sudo_debug_printf(SUDO_DEBUG_INFO, "netgroups are disabled");
+ debug_return_bool(false);
+ }
+
+#ifdef HAVE_INNETGR
+ /* make sure we have a valid netgroup, sudo style */
+ if (*netgr++ != '+') {
+ sudo_debug_printf(SUDO_DEBUG_DIAG, "netgroup %s has no leading '+'",
+ netgr);
+ debug_return_bool(false);
+ }
+
+ /* get the domain name (if any) */
+ domain = sudo_getdomainname();
+
+ if (innetgr(netgr, lhost, user, domain))
+ rc = true;
+ else if (lhost != shost && innetgr(netgr, shost, user, domain))
+ rc = true;
+
+ sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
+ "netgroup %s matches (%s|%s, %s, %s): %s", netgr, lhost ? lhost : "",
+ shost ? shost : "", user ? user : "", domain ? domain : "",
+ rc ? "true" : "false");
+#endif /* HAVE_INNETGR */
+
+ debug_return_bool(rc);
+}