mirrors
/
sudo
mirror of https://github.com/sudo-project/sudo.git
0
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
sudo/plugins/sudoers/match.c

813 lines
22 KiB
C
Raw Permalink Blame History

/*
* 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>
/*
* Check whether user described by pw matches member.
* Returns ALLOW, DENY or UNSPEC.
*/
int
user_matches(const struct sudoers_parse_tree *parse_tree,
const struct passwd *pw, const struct member *m)
{
const struct sudoers_context *ctx = parse_tree->ctx;
const char *lhost = parse_tree->lhost ? parse_tree->lhost : ctx->runas.host;
const char *shost = parse_tree->shost ? parse_tree->shost : ctx->runas.shost;
int matched = UNSPEC;
struct alias *a;
debug_decl(user_matches, SUDOERS_DEBUG_MATCH);
switch (m->type) {
case ALL:
matched = m->negated ? DENY : ALLOW;
break;
case NETGROUP:
if (netgr_matches(parse_tree->nss, m->name,
def_netgroup_tuple ? lhost : NULL,
def_netgroup_tuple ? shost : NULL, pw->pw_name) == ALLOW)
matched = m->negated ? DENY : ALLOW;
break;
case USERGROUP:
if (usergr_matches(m->name, pw->pw_name, pw) == ALLOW)
matched = m->negated ? DENY : ALLOW;
break;
case ALIAS:
if ((a = alias_get(parse_tree, m->name, USERALIAS)) != NULL) {
/* XXX */
const int rc = userlist_matches(parse_tree, pw, &a->members);
if (SPECIFIED(rc)) {
if (m->negated) {
matched = rc == ALLOW ? DENY : ALLOW;
} else {
matched = rc;
}
}
alias_put(a);
break;
}
FALLTHROUGH;
case WORD:
if (userpw_matches(m->name, pw->pw_name, pw) == ALLOW)
matched = m->negated ? DENY : ALLOW;
break;
}
debug_return_int(matched);
}
/*
* Check for user described by pw in a list of members.
* Returns ALLOW, DENY or UNSPEC.
*/
int
userlist_matches(const 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) {
matched = user_matches(parse_tree, pw, m);
if (SPECIFIED(matched))
break;
}
debug_return_int(matched);
}
struct gid_list *
runas_getgroups(const struct sudoers_context *ctx)
{
const struct passwd *pw;
debug_decl(runas_getgroups, SUDOERS_DEBUG_MATCH);
if (def_preserve_groups) {
sudo_gidlist_addref(ctx->user.gid_list);
debug_return_ptr(ctx->user.gid_list);
}
/* Only use results from a group db query, not the front end. */
pw = ctx->runas.pw ? ctx->runas.pw : ctx->user.pw;
debug_return_ptr(sudo_get_gidlist(pw, ENTRY_TYPE_QUERIED));
}
/*
* Check whether the requested runas user matches user_list, the
* user portion of a sudoers runaslist. If user_list is NULL, a
* list containing runas_default is used.
* Returns ALLOW, DENY or UNSPEC.
*/
static int
runas_userlist_matches(const struct sudoers_parse_tree *parse_tree,
const struct member_list *user_list, struct member **matching_user)
{
const struct sudoers_context *ctx = parse_tree->ctx;
const char *lhost = parse_tree->lhost ? parse_tree->lhost : ctx->runas.host;
const char *shost = parse_tree->shost ? parse_tree->shost : ctx->runas.shost;
int user_matched = UNSPEC;
struct member *m;
struct alias *a;
debug_decl(runas_userlist_matches, SUDOERS_DEBUG_MATCH);
TAILQ_FOREACH_REVERSE(m, user_list, member_list, entries) {
switch (m->type) {
case ALL:
user_matched = m->negated ? DENY : ALLOW;
break;
case NETGROUP:
if (netgr_matches(parse_tree->nss, m->name,
def_netgroup_tuple ? lhost : NULL,
def_netgroup_tuple ? shost : NULL,
ctx->runas.pw->pw_name) == ALLOW)
user_matched = m->negated ? DENY : ALLOW;
break;
case USERGROUP:
if (usergr_matches(m->name, ctx->runas.pw->pw_name, ctx->runas.pw) == ALLOW)
user_matched = m->negated ? DENY : ALLOW;
break;
case ALIAS:
a = alias_get(parse_tree, m->name, RUNASALIAS);
if (a != NULL) {
const int rc = runas_userlist_matches(parse_tree,
&a->members, matching_user);
if (SPECIFIED(rc)) {
if (m->negated) {
user_matched = rc == ALLOW ? DENY : ALLOW;
} else {
user_matched = rc;
}
}
alias_put(a);
break;
}
FALLTHROUGH;
case WORD:
if (userpw_matches(m->name, ctx->runas.pw->pw_name, ctx->runas.pw) == ALLOW)
user_matched = m->negated ? DENY : ALLOW;
break;
case MYSELF:
/*
* Only match a rule with an empty runas user if a group
* was specified on the command line without a user _or_
* the user specified their own name on the command line.
*/
if ((!ISSET(ctx->settings.flags, RUNAS_USER_SPECIFIED) &&
ISSET(ctx->settings.flags, RUNAS_GROUP_SPECIFIED)) ||
strcmp(ctx->user.name, ctx->runas.pw->pw_name) == 0)
user_matched = m->negated ? DENY : ALLOW;
break;
}
if (SPECIFIED(user_matched)) {
if (matching_user != NULL && m->type != ALIAS)
*matching_user = m;
break;
}
}
debug_return_int(user_matched);
}
/*
* Check whether the requested runas group matches group_list, the
* group portion of a sudoers runaslist, or the runas user's groups.
* Returns ALLOW, DENY or UNSPEC.
*/
static int
runas_grouplist_matches(const struct sudoers_parse_tree *parse_tree,
const struct member_list *group_list, struct member **matching_group)
{
const struct sudoers_context *ctx = parse_tree->ctx;
int group_matched = UNSPEC;
struct member *m;
struct alias *a;
debug_decl(runas_grouplist_matches, SUDOERS_DEBUG_MATCH);
if (group_list != NULL) {
TAILQ_FOREACH_REVERSE(m, group_list, member_list, entries) {
switch (m->type) {
case ALL:
group_matched = m->negated ? DENY : ALLOW;
break;
case ALIAS:
a = alias_get(parse_tree, m->name, RUNASALIAS);
if (a != NULL) {
const int rc = runas_grouplist_matches(parse_tree,
&a->members, matching_group);
if (SPECIFIED(rc)) {
if (m->negated) {
group_matched = rc == ALLOW ? DENY : ALLOW;
} else {
group_matched = rc;
}
}
alias_put(a);
break;
}
FALLTHROUGH;
case WORD:
if (group_matches(m->name, ctx->runas.gr) == ALLOW)
group_matched = m->negated ? DENY : ALLOW;
break;
}
if (SPECIFIED(group_matched)) {
if (matching_group != NULL && m->type != ALIAS)
*matching_group = m;
break;
}
}
}
if (!SPECIFIED(group_matched)) {
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 (ctx->runas.pw->pw_gid == ctx->runas.gr->gr_gid) {
group_matched = ALLOW; /* runas group matches passwd db */
} else if ((runas_groups = runas_getgroups(ctx)) != NULL) {
int i;
for (i = 0; i < runas_groups->ngids; i++) {
if (runas_groups->gids[i] == ctx->runas.gr->gr_gid) {
group_matched = ALLOW; /* matched aux group vector */
break;
}
}
sudo_gidlist_delref(runas_groups);
}
}
debug_return_int(group_matched);
}
/*
* Check whether the sudoers runaslist, composed of user_list and
* group_list, matches the runas user/group requested by the user.
* Either (or both) user_list and group_list may be NULL.
* If user_list is NULL, a list containing runas_default is used.
* Returns ALLOW, DENY or UNSPEC.
*/
int
runaslist_matches(const 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 struct sudoers_context *ctx = parse_tree->ctx;
struct member_list _user_list = TAILQ_HEAD_INITIALIZER(_user_list);
int user_matched, group_matched = UNSPEC;
struct member m_user;
debug_decl(runaslist_matches, SUDOERS_DEBUG_MATCH);
/* If no runas user listed in sudoers, use the default value. */
if (user_list == NULL) {
m_user.name = def_runas_default;
m_user.type = WORD;
m_user.negated = false;
TAILQ_INSERT_HEAD(&_user_list, &m_user, entries);
user_list = &_user_list;
matching_user = NULL;
}
user_matched = runas_userlist_matches(parse_tree, user_list, matching_user);
if (ISSET(ctx->settings.flags, RUNAS_GROUP_SPECIFIED)) {
group_matched = runas_grouplist_matches(parse_tree, group_list,
matching_group);
}
if (user_matched == DENY || group_matched == DENY)
debug_return_int(DENY);
if (user_matched == group_matched || ctx->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(const 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 (SPECIFIED(matched))
break;
}
debug_return_int(matched);
}
/*
* Check for ctx->runas.host and ctx->runas.shost in a list of members.
* Returns ALLOW, DENY or UNSPEC.
*/
int
hostlist_matches(const struct sudoers_parse_tree *parse_tree,
const struct passwd *pw, const struct member_list *list)
{
const struct sudoers_context *ctx = parse_tree->ctx;
const char *lhost = parse_tree->lhost ? parse_tree->lhost : ctx->runas.host;
const char *shost = parse_tree->shost ? parse_tree->shost : ctx->runas.shost;
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(const struct sudoers_parse_tree *parse_tree,
const struct passwd *pw, const char *lhost, const char *shost,
const struct member *m)
{
struct alias *a;
int ret = UNSPEC;
debug_decl(host_matches, SUDOERS_DEBUG_MATCH);
switch (m->type) {
case ALL:
ret = m->negated ? DENY : ALLOW;
break;
case NETGROUP:
if (netgr_matches(parse_tree->nss, m->name, lhost, shost,
def_netgroup_tuple ? pw->pw_name : NULL) == ALLOW)
ret = m->negated ? DENY : ALLOW;
break;
case NTWKADDR:
if (addr_matches(m->name) == ALLOW)
ret = m->negated ? DENY : ALLOW;
break;
case ALIAS:
a = alias_get(parse_tree, m->name, HOSTALIAS);
if (a != NULL) {
/* XXX */
const int rc = hostlist_matches_int(parse_tree, pw, lhost,
shost, &a->members);
if (SPECIFIED(rc)) {
if (m->negated) {
ret = rc == ALLOW ? DENY : ALLOW;
} else {
ret = rc;
}
}
alias_put(a);
break;
}
FALLTHROUGH;
case WORD:
if (hostname_matches(shost, lhost, m->name) == ALLOW)
ret = m->negated ? DENY : ALLOW;
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",
ret == ALLOW ? "ALLOW" : "DENY");
debug_return_int(ret);
}
/*
* Check for cmnd and args in a list of members.
* Returns ALLOW, DENY or UNSPEC.
*/
int
cmndlist_matches(const struct sudoers_parse_tree *parse_tree,
const struct member_list *list, const char *runchroot,
struct cmnd_info *info)
{
struct member *m;
int matched;
debug_decl(cmndlist_matches, SUDOERS_DEBUG_MATCH);
TAILQ_FOREACH_REVERSE(m, list, member_list, entries) {
matched = cmnd_matches(parse_tree, m, runchroot, info);
if (SPECIFIED(matched))
debug_return_int(matched);
}
debug_return_int(UNSPEC);
}
/*
* Check cmnd and args.
* Returns ALLOW, DENY or UNSPEC.
*/
int
cmnd_matches(const 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(parse_tree->ctx, c->cmnd, c->args, runchroot,
info, &c->digests) == ALLOW)
matched = m->negated ? DENY : ALLOW;
break;
case ALIAS:
a = alias_get(parse_tree, m->name, CMNDALIAS);
if (a != NULL) {
rc = cmndlist_matches(parse_tree, &a->members, runchroot, info);
if (SPECIFIED(rc)) {
if (m->negated) {
matched = rc == ALLOW ? DENY : ALLOW;
} else {
matched = 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(const 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(parse_tree->ctx, c->cmnd, c->args, runchroot,
info, &c->digests) == ALLOW)
matched = negated ? DENY : ALLOW;
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 (SPECIFIED(matched)) {
if (negated)
matched = matched == ALLOW ? DENY : ALLOW;
break;
}
}
alias_put(a);
}
break;
}
debug_return_int(matched);
}
/*
* Returns ALLOW if the hostname matches the pattern, else DENY
*/
int
hostname_matches(const char *shost, const char *lhost, const char *pattern)
{
const char *host;
int ret;
debug_decl(hostname_matches, SUDOERS_DEBUG_MATCH);
host = strchr(pattern, '.') != NULL ? lhost : shost;
ret = DENY;
if (has_meta(pattern)) {
if (fnmatch(pattern, host, FNM_CASEFOLD) == 0)
ret = ALLOW;
} else {
if (strcasecmp(host, pattern) == 0)
ret = ALLOW;
}
debug_return_int(ret);
}
/*
* Returns ALLOW if the user/uid from sudoers matches the specified user/uid,
* else returns DENY.
*/
int
userpw_matches(const char *sudoers_user, const char *user, const struct passwd *pw)
{
const char *errstr;
int ret = DENY;
uid_t uid;
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) {
ret = ALLOW;
goto done;
}
}
if (def_case_insensitive_user) {
if (strcasecmp(sudoers_user, user) == 0)
ret = ALLOW;
} else {
if (strcmp(sudoers_user, user) == 0)
ret = ALLOW;
}
done:
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"user %s matches sudoers user %s: %s",
user, sudoers_user, ret == ALLOW ? "ALLOW" : "DENY");
debug_return_int(ret);
}
/*
* Returns ALLOW if the group/gid from sudoers matches the specified group/gid,
* else returns DENY.
*/
int
group_matches(const char *sudoers_group, const struct group *gr)
{
const char *errstr;
int ret = DENY;
gid_t gid;
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) {
ret = ALLOW;
goto done;
}
}
if (def_case_insensitive_group) {
if (strcasecmp(sudoers_group, gr->gr_name) == 0)
ret = ALLOW;
} else {
if (strcmp(sudoers_group, gr->gr_name) == 0)
ret = ALLOW;
}
done:
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"group %s matches sudoers group %s: %s",
gr->gr_name, sudoers_group, ret == ALLOW ? "ALLOW" : "DENY");
debug_return_int(ret);
}
/*
* Returns true if the given user belongs to the named group,
* else returns false.
*/
int
usergr_matches(const char *group, const char *user, const struct passwd *pw)
{
struct passwd *pw0 = NULL;
int ret = DENY;
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)
ret = ALLOW;
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)) {
ret = ALLOW;
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) {
ret = ALLOW;
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,
ret == ALLOW ? "ALLOW" : "DENY");
debug_return_int(ret);
}
#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 ALLOW if "host" and "user" belong to the netgroup "netgr",
* else return DENY. Either of "lhost", "shost" or "user" may be NULL
* in which case that argument is not checked...
*/
int
netgr_matches(const struct sudo_nss *nss, const char *netgr,
const char *lhost, const char *shost, const char *user)
{
const char *domain;
int ret = DENY;
debug_decl(netgr_matches, SUDOERS_DEBUG_MATCH);
if (!def_use_netgroups) {
sudo_debug_printf(SUDO_DEBUG_INFO, "netgroups are disabled");
debug_return_int(DENY);
}
/* 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_int(DENY);
}
/* get the domain name (if any) */
domain = sudo_getdomainname();
/* Use nss-specific innetgr() function if available. */
if (nss != NULL && nss->innetgr != NULL) {
switch (nss->innetgr(nss, netgr, lhost, user, domain)) {
case 0:
if (lhost != shost) {
if (nss->innetgr(nss, netgr, shost, user, domain) == 1)
ret = ALLOW;
}
goto done;
case 1:
ret = ALLOW;
goto done;
default:
/* Not supported, use system innetgr(3). */
break;
}
}
#ifdef HAVE_INNETGR
/* Use system innetgr() function. */
if (innetgr(netgr, lhost, user, domain) == 1) {
ret = ALLOW;
} else if (lhost != shost) {
if (innetgr(netgr, shost, user, domain) == 1)
ret = ALLOW;
}
#else
sudo_debug_printf(SUDO_DEBUG_WARN|SUDO_DEBUG_LINENO,
"%s: no system netgroup support", __func__);
#endif /* HAVE_INNETGR */
done:
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 : "",
ret == ALLOW ? "ALLOW" : "DENY");
debug_return_int(ret);
}
Reference in New Issue View Git Blame Copy Permalink