emo/shadow
1
0
Fork 0
Code Issues Pull Requests Packages Releases Activity

* NEWS, src/userdel.c, man/userdel.8.xml: Add option -Z/--selinux-user.

Browse Source 
* libmisc/system.c, lib/prototypes.h, libmisc/Makefile.am: Removed
	safe_system().
	* lib/selinux.c, po/POTFILES.in, lib/prototypes.h,
	lib/Makefile.am: Added helper functions for semanage.
	* README, src/useradd.c, src/usermod.c, src/userdel.c,
	configure.in: Use libsemanage instead of semanage.
This commit is contained in:
nekral-guest
2011-11-17 21:51:07 +00:00
parent f3ef11056f
commit 29050eadb5
15 changed files with 519 additions and 195 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
lib/Makefile.am
View File

@@ -39,6 +39,7 @@ libshadow_la_SOURCES = \
pwio.c \
pwio.h \
pwmem.c \
selinux.c \
sgetgrent.c \
sgetpwent.c \
sgetspent.c \

10
lib/prototypes.h
View File

@@ -297,6 +297,10 @@ extern void process_root_flag (const char* short_opt, int argc, char **argv);
/* salt.c */
extern /*@observer@*/const char *crypt_make_salt (/*@null@*//*@observer@*/const char *meth, /*@null@*/void *arg);
/* selinux.c */
int set_seuser(const char *login_name, const char *seuser_name);
int del_seuser(const char *login_name);
/* setugid.c */
extern int setup_groups (const struct passwd *info);
extern int change_uid (const struct passwd *info);
@@ -345,12 +349,6 @@ extern int shell (const char *file, /*@null@*/const char *arg, char *const envp[
extern int run_command (const char *cmd, const char *argv[],
/*@null@*/const char *envp[], /*@out@*/int *status);
/* system.c */
extern int safe_system (const char *command,
const char *argv[],
/*@null@*/const char *env[],
bool ignore_stderr);
/* strtoday.c */
extern long strtoday (const char *);

374
lib/selinux.c Normal file
View File

@@ -0,0 +1,374 @@
/*
* Copyright (c) 2010 , Jakub Hrozek <jhrozek@redhat.com>
* Copyright (c) 2011 , Peter Vrabec <pvrabec@redhat.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the copyright holders or contributors may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#ifdef WITH_SELINUX
#include "defines.h"
#include <stdio.h>
#include <stdarg.h>
#include <selinux/selinux.h>
#include <semanage/semanage.h>
#ifndef DEFAULT_SERANGE
#define DEFAULT_SERANGE "s0"
#endif
static void semanage_error_callback (void *varg,
semanage_handle_t *handle,
const char *fmt, ...)
{
int ret;
char * message = NULL;
va_list ap;
va_start (ap, fmt);
ret = vasprintf (&message, fmt, ap);
va_end (ap);
if (ret < 0) {
/* ENOMEM */
return;
}
switch (semanage_msg_get_level (handle)) {
case SEMANAGE_MSG_ERR:
case SEMANAGE_MSG_WARN:
fprintf (stderr, _("[libsemanage]: %s\n"), message);
break;
case SEMANAGE_MSG_INFO:
/* nop */
break;
}
free (message);
}
static semanage_handle_t *semanage_init (void)
{
int ret;
semanage_handle_t *handle = NULL;
handle = semanage_handle_create ();
if (NULL == handle) {
fprintf (stderr,
_("Cannot create SELinux management handle\n"));
return NULL;
}
semanage_msg_set_callback (handle, semanage_error_callback, NULL);
ret = semanage_is_managed (handle);
if (ret != 1) {
fprintf (stderr, _("SELinux policy not managed\n"));
goto fail;
}
ret = semanage_access_check (handle);
if (ret < SEMANAGE_CAN_READ) {
fprintf (stderr, _("Cannot read SELinux policy store\n"));
goto fail;
}
ret = semanage_connect (handle);
if (ret != 0) {
fprintf (stderr,
_("Cannot establish SELinux management connection\n"));
goto fail;
}
ret = semanage_begin_transaction (handle);
if (ret != 0) {
fprintf (stderr, _("Cannot begin SELinux transaction\n"));
goto fail;
}
return handle;
fail:
semanage_handle_destroy (handle);
return NULL;
}
static int semanage_user_mod (semanage_handle_t *handle,
semanage_seuser_key_t *key,
const char *login_name,
const char *seuser_name)
{
int ret;
semanage_seuser_t *seuser = NULL;
semanage_seuser_query (handle, key, &seuser);
if (NULL == seuser) {
fprintf (stderr,
_("Could not query seuser for %s\n"), login_name);
ret = 1;
goto done;
}
ret = semanage_seuser_set_mlsrange (handle, seuser, DEFAULT_SERANGE);
if (ret != 0) {
fprintf (stderr,
_("Could not set serange for %s\n"), login_name);
ret = 1;
goto done;
}
ret = semanage_seuser_set_sename (handle, seuser, seuser_name);
if (ret != 0) {
fprintf (stderr,
_("Could not set sename for %s\n"),
login_name);
ret = 1;
goto done;
}
ret = semanage_seuser_modify_local (handle, key, seuser);
if (ret != 0) {
fprintf (stderr,
_("Could not modify login mapping for %s\n"),
login_name);
ret = 1;
goto done;
}
ret = 0;
done:
semanage_seuser_free (seuser);
return ret;
}
static int semanage_user_add (semanage_handle_t *handle,
semanage_seuser_key_t *key,
const char *login_name,
const char *seuser_name)
{
int ret;
semanage_seuser_t *seuser = NULL;
ret = semanage_seuser_create (handle, &seuser);
if (ret != 0) {
fprintf (stderr,
_("Cannot create SELinux login mapping for %s\n"),
login_name);
ret = 1;
goto done;
}
ret = semanage_seuser_set_name (handle, seuser, login_name);
if (ret != 0) {
fprintf (stderr, _("Could not set name for %s\n"), login_name);
ret = 1;
goto done;
}
ret = semanage_seuser_set_mlsrange (handle, seuser, DEFAULT_SERANGE);
if (ret != 0) {
fprintf (stderr,
_("Could not set serange for %s\n"),
login_name);
ret = 1;
goto done;
}
ret = semanage_seuser_set_sename (handle, seuser, seuser_name);
if (ret != 0) {
fprintf (stderr,
_("Could not set SELinux user for %s\n"),
login_name);
ret = 1;
goto done;
}
ret = semanage_seuser_modify_local (handle, key, seuser);
if (ret != 0) {
fprintf (stderr,
_("Could not add login mapping for %s\n"),
login_name);
ret = 1;
goto done;
}
ret = 0;
done:
semanage_seuser_free (seuser);
return ret;
}
int set_seuser (const char *login_name, const char *seuser_name)
{
semanage_handle_t *handle = NULL;
semanage_seuser_key_t *key = NULL;
int ret;
int seuser_exists = 0;
if (NULL == seuser_name) {
/* don't care, just let system pick the defaults */
return 0;
}
handle = semanage_init ();
if (NULL == handle) {
fprintf (stderr, _("Cannot init SELinux management\n"));
ret = 1;
goto done;
}
ret = semanage_seuser_key_create (handle, login_name, &key);
if (ret != 0) {
fprintf (stderr, _("Cannot create SELinux user key\n"));
ret = 1;
goto done;
}
ret = semanage_seuser_exists (handle, key, &seuser_exists);
if (ret < 0) {
fprintf (stderr, _("Cannot verify the SELinux user\n"));
ret = 1;
goto done;
}
if (0 != seuser_exists) {
ret = semanage_user_mod (handle, key, login_name, seuser_name);
if (ret != 0) {
fprintf (stderr,
_("Cannot modify SELinux user mapping\n"));
ret = 1;
goto done;
}
} else {
ret = semanage_user_add (handle, key, login_name, seuser_name);
if (ret != 0) {
fprintf (stderr,
_("Cannot add SELinux user mapping\n"));
ret = 1;
goto done;
}
}
ret = semanage_commit (handle);
if (ret < 0) {
fprintf (stderr, _("Cannot commit SELinux transaction\n"));
ret = 1;
goto done;
}
ret = 0;
done:
semanage_seuser_key_free (key);
semanage_handle_destroy (handle);
return ret;
}
int del_seuser (const char *login_name)
{
semanage_handle_t *handle = NULL;
semanage_seuser_key_t *key = NULL;
int ret;
int exists = 0;
handle = semanage_init ();
if (NULL == handle) {
fprintf (stderr, _("Cannot init SELinux management\n"));
ret = 1;
goto done;
}
ret = semanage_seuser_key_create (handle, login_name, &key);
if (ret != 0) {
fprintf (stderr, _("Cannot create SELinux user key\n"));
ret = 1;
goto done;
}
ret = semanage_seuser_exists (handle, key, &exists);
if (ret < 0) {
fprintf (stderr, _("Cannot verify the SELinux user\n"));
ret = 1;
goto done;
}
if (0 == exists) {
fprintf (stderr,
_("Login mapping for %s is not defined, OK if default mapping was used\n"),
login_name);
ret = 0; /* probably default mapping */
goto done;
}
ret = semanage_seuser_exists_local (handle, key, &exists);
if (ret < 0) {
fprintf (stderr, _("Cannot verify the SELinux user\n"));
ret = 1;
goto done;
}
if (0 == exists) {
fprintf (stderr,
_("Login mapping for %s is defined in policy, cannot be deleted\n"),
login_name);
ret = 0; /* Login mapping defined in policy can't be deleted */
goto done;
}
ret = semanage_seuser_del_local (handle, key);
if (ret != 0) {
fprintf (stderr,
_("Could not delete login mapping for %s"),
login_name);
ret = 1;
goto done;
}
ret = semanage_commit (handle);
if (ret < 0) {
fprintf (stderr, _("Cannot commit SELinux transaction\n"));
ret = 1;
goto done;
}
ret = 0;
done:
semanage_handle_destroy (handle);
return ret;
}
#else /* !WITH_SELINUX */
extern int errno; /* warning: ANSI C forbids an empty source file */
#endif /* !WITH_SELINUX */