selinux: split off selinux calls into seperate file label.c
This commit is contained in:
parent
7fab9d01b5
commit
e51bc1a23e
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@ -240,6 +240,7 @@ noinst_LTLIBRARIES = \
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libsystemd_basic_la_SOURCES = \
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src/util.c \
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src/label.c \
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src/hashmap.c \
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src/set.c \
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src/strv.c \
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2
fixme
2
fixme
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@ -85,6 +85,8 @@
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* plymouth different shut down msgs
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* fix nscd disable
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External:
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* sysv functions should color when stdout is tty, not stdin
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@ -37,6 +37,7 @@
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#include "dbus-automount.h"
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#include "bus-errors.h"
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#include "special.h"
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#include "label.h"
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static const UnitActiveState state_translation_table[_AUTOMOUNT_STATE_MAX] = {
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[AUTOMOUNT_DEAD] = UNIT_INACTIVE,
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@ -0,0 +1,291 @@
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/*-*- Mode: C; c-basic-offset: 8 -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "label.h"
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#include "util.h"
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#ifdef HAVE_SELINUX
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#include <selinux/selinux.h>
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#include <selinux/label.h>
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static struct selabel_handle *label_hnd = NULL;
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static inline bool use_selinux(void) {
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static int use_selinux_ind = -1;
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if (use_selinux_ind < 0)
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use_selinux_ind = is_selinux_enabled() > 0;
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return use_selinux_ind;
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}
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static int label_get_file_label_from_path(
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const char *label,
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const char *path,
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const char *class,
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security_context_t *fcon) {
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security_context_t dir_con = NULL;
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security_class_t sclass;
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int r = 0;
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r = getfilecon(path, &dir_con);
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if (r >= 0) {
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r = -1;
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errno = EINVAL;
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if ((sclass = string_to_security_class(class)) != 0)
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r = security_compute_create((security_context_t) label, dir_con, sclass, fcon);
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}
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if (r < 0)
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r = -errno;
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freecon(dir_con);
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return r;
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}
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#endif
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int label_init(void) {
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int r = 0;
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#ifdef HAVE_SELINUX
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if (!use_selinux())
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return 0;
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label_hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0);
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if (!label_hnd) {
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log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
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"Failed to initialize SELinux context: %m");
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r = (security_getenforce() == 1) ? -errno : 0;
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}
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#endif
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return r;
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}
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int label_fix(const char *path) {
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int r = 0;
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#ifdef HAVE_SELINUX
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struct stat st;
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security_context_t fcon;
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if (!use_selinux() || !label_hnd)
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return 0;
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r = lstat(path, &st);
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if (r == 0) {
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r = selabel_lookup_raw(label_hnd, &fcon, path, st.st_mode);
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if (r == 0) {
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r = setfilecon(path, fcon);
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freecon(fcon);
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}
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}
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if (r < 0) {
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log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
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"Unable to fix label of %s: %m", path);
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r = (security_getenforce() == 1) ? -errno : 0;
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}
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#endif
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return r;
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}
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void label_finish(void) {
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#ifdef HAVE_SELINUX
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if (use_selinux() && label_hnd)
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selabel_close(label_hnd);
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#endif
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}
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int label_get_socket_label_from_exe(const char *exe, char **label) {
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int r = 0;
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#ifdef HAVE_SELINUX
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security_context_t mycon = NULL, fcon = NULL;
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security_class_t sclass;
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if (!use_selinux()) {
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*label = NULL;
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return 0;
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}
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r = getcon(&mycon);
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if (r < 0)
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goto fail;
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r = getfilecon(exe, &fcon);
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if (r < 0)
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goto fail;
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sclass = string_to_security_class("process");
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r = security_compute_create(mycon, fcon, sclass, (security_context_t *) label);
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if (r == 0)
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log_debug("SELinux Socket context for %s will be set to %s", exe, *label);
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fail:
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if (r < 0 && security_getenforce() == 1)
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r = -errno;
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freecon(mycon);
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freecon(fcon);
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#endif
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return r;
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}
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int label_fifofile_set(const char *label, const char *path) {
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int r = 0;
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#ifdef HAVE_SELINUX
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security_context_t filecon = NULL;
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if (!use_selinux() || !label)
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return 0;
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if (((r = label_get_file_label_from_path(label, path, "fifo_file", &filecon)) == 0)) {
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if ((r = setfscreatecon(filecon)) < 0) {
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log_error("Failed to set SELinux file context (%s) on %s: %m", label, path);
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r = -errno;
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}
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freecon(filecon);
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}
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if (r < 0 && security_getenforce() == 0)
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r = 0;
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#endif
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return r;
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}
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int label_socket_set(const char *label) {
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#ifdef HAVE_SELINUX
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if (!use_selinux())
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return 0;
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if (setsockcreatecon((security_context_t) label) < 0) {
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log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
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"Failed to set SELinux context (%s) on socket: %m", label);
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if (security_getenforce() == 1)
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return -errno;
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}
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#endif
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return 0;
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}
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void label_file_clear(void) {
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#ifdef HAVE_SELINUX
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if (!use_selinux())
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return;
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setfscreatecon(NULL);
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#endif
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}
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void label_socket_clear(void) {
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#ifdef HAVE_SELINUX
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if (!use_selinux())
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return;
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setsockcreatecon(NULL);
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#endif
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}
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void label_free(const char *label) {
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#ifdef HAVE_SELINUX
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if (!use_selinux())
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return;
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freecon((security_context_t) label);
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#endif
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}
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int label_mkdir(
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const char *path,
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mode_t mode) {
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/* Creates a directory and labels it according to the SELinux policy */
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#ifdef HAVE_SELINUX
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int r;
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security_context_t fcon = NULL;
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if (use_selinux() && label_hnd) {
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if (path[0] == '/')
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r = selabel_lookup_raw(label_hnd, &fcon, path, mode);
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else {
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char *cwd = NULL, *newpath = NULL;
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cwd = get_current_dir_name();
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if (cwd || asprintf(&newpath, "%s/%s", cwd, path) < 0) {
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free(cwd);
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return -errno;
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}
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r = selabel_lookup_raw(label_hnd, &fcon, newpath, mode);
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free(cwd);
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free(newpath);
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}
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if (r == 0)
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r = setfscreatecon(fcon);
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if (r < 0 && errno != ENOENT) {
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log_error("Failed to set security context %s for %s: %m", fcon, path);
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r = -errno;
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if (security_getenforce() == 1)
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goto finish;
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}
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}
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if ((r = mkdir(path, mode)) < 0)
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r = -errno;
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finish:
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if (use_selinux() && label_hnd) {
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setfscreatecon(NULL);
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freecon(fcon);
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}
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return r;
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#else
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return mkdir(path, mode);
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#endif
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}
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@ -0,0 +1,44 @@
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/*-*- Mode: C; c-basic-offset: 8 -*-*/
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#ifndef foolabelhfoo
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#define foolabelhfoo
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/types.h>
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int label_init(void);
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void label_finish(void);
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int label_fix(const char *path);
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int label_socket_set(const char *label);
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void label_socket_clear(void);
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int label_fifofile_set(const char *label, const char *path);
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void label_file_clear(void);
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void label_free(const char *label);
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int label_get_socket_label_from_exe(const char *exe, char **label);
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int label_mkdir(const char *path, mode_t mode);
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#endif
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@ -45,6 +45,7 @@
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#include "conf-parser.h"
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#include "bus-errors.h"
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#include "missing.h"
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#include "label.h"
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static enum {
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ACTION_RUN,
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@ -34,6 +34,7 @@
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#include "util.h"
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#include "socket-util.h"
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#include "missing.h"
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#include "label.h"
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int socket_address_parse(SocketAddress *a, const char *s) {
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int r;
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@ -40,6 +40,7 @@
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#include "missing.h"
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#include "special.h"
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#include "bus-errors.h"
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#include "label.h"
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static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
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[SOCKET_DEAD] = UNIT_INACTIVE,
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258
src/util.c
258
src/util.c
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@ -55,263 +55,7 @@
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#include "missing.h"
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#include "log.h"
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#include "strv.h"
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#ifdef HAVE_SELINUX
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#include <selinux/selinux.h>
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#include <selinux/label.h>
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static struct selabel_handle *label_hnd = NULL;
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static inline bool use_selinux(void) {
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static int use_selinux_ind = -1;
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if (use_selinux_ind < 0)
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use_selinux_ind = is_selinux_enabled() > 0;
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return use_selinux_ind;
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}
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static int label_get_file_label_from_path(
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const char *label,
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const char *path,
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const char *class,
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security_context_t *fcon) {
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security_context_t dir_con = NULL;
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security_class_t sclass;
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int r = 0;
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r = getfilecon(path, &dir_con);
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if (r >= 0) {
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r = -1;
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errno = EINVAL;
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if ((sclass = string_to_security_class(class)) != 0)
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r = security_compute_create((security_context_t) label, dir_con, sclass, fcon);
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}
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if (r < 0)
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r = -errno;
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freecon(dir_con);
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return r;
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}
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#endif
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int label_init(void) {
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int r = 0;
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#ifdef HAVE_SELINUX
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if (!use_selinux())
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return 0;
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label_hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0);
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if (!label_hnd) {
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log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
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"Failed to initialize SELinux context: %m");
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r = (security_getenforce() == 1) ? -errno : 0;
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}
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#endif
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return r;
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}
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int label_fix(const char *path) {
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int r = 0;
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#ifdef HAVE_SELINUX
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struct stat st;
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security_context_t fcon;
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if (!use_selinux() || !label_hnd)
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return 0;
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r = lstat(path, &st);
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if (r == 0) {
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r = selabel_lookup_raw(label_hnd, &fcon, path, st.st_mode);
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if (r == 0) {
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r = setfilecon(path, fcon);
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freecon(fcon);
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}
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}
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if (r < 0) {
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log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
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"Unable to fix label of %s: %m", path);
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r = (security_getenforce() == 1) ? -errno : 0;
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}
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#endif
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return r;
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}
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void label_finish(void) {
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#ifdef HAVE_SELINUX
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if (use_selinux() && label_hnd)
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selabel_close(label_hnd);
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#endif
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}
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int label_get_socket_label_from_exe(const char *exe, char **label) {
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int r = 0;
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#ifdef HAVE_SELINUX
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security_context_t mycon = NULL, fcon = NULL;
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security_class_t sclass;
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if (!use_selinux()) {
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*label = NULL;
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return 0;
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}
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r = getcon(&mycon);
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if (r < 0)
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goto fail;
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r = getfilecon(exe, &fcon);
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if (r < 0)
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goto fail;
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sclass = string_to_security_class("process");
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r = security_compute_create(mycon, fcon, sclass, (security_context_t *) label);
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if (r == 0)
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log_debug("SELinux Socket context for %s will be set to %s", exe, *label);
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fail:
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if (r < 0 && security_getenforce() == 1)
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r = -errno;
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freecon(mycon);
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freecon(fcon);
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#endif
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return r;
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}
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int label_fifofile_set(const char *label, const char *path) {
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int r = 0;
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|
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#ifdef HAVE_SELINUX
|
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security_context_t filecon = NULL;
|
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|
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if (!use_selinux() || !label)
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return 0;
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|
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if (((r = label_get_file_label_from_path(label, path, "fifo_file", &filecon)) == 0)) {
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if ((r = setfscreatecon(filecon)) < 0) {
|
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log_error("Failed to set SELinux file context (%s) on %s: %m", label, path);
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r = -errno;
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}
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|
||||
freecon(filecon);
|
||||
}
|
||||
|
||||
if (r < 0 && security_getenforce() == 0)
|
||||
r = 0;
|
||||
#endif
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
int label_socket_set(const char *label) {
|
||||
|
||||
#ifdef HAVE_SELINUX
|
||||
if (!use_selinux())
|
||||
return 0;
|
||||
|
||||
if (setsockcreatecon((security_context_t) label) < 0) {
|
||||
log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
|
||||
"Failed to set SELinux context (%s) on socket: %m", label);
|
||||
|
||||
if (security_getenforce() == 1)
|
||||
return -errno;
|
||||
}
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void label_file_clear(void) {
|
||||
|
||||
#ifdef HAVE_SELINUX
|
||||
if (!use_selinux())
|
||||
return;
|
||||
|
||||
setfscreatecon(NULL);
|
||||
#endif
|
||||
}
|
||||
|
||||
void label_socket_clear(void) {
|
||||
|
||||
#ifdef HAVE_SELINUX
|
||||
if (!use_selinux())
|
||||
return;
|
||||
|
||||
setsockcreatecon(NULL);
|
||||
#endif
|
||||
}
|
||||
|
||||
void label_free(const char *label) {
|
||||
|
||||
#ifdef HAVE_SELINUX
|
||||
if (!use_selinux())
|
||||
return;
|
||||
|
||||
freecon((security_context_t) label);
|
||||
#endif
|
||||
}
|
||||
|
||||
static int label_mkdir(
|
||||
const char *path,
|
||||
mode_t mode) {
|
||||
|
||||
#ifdef HAVE_SELINUX
|
||||
int r;
|
||||
security_context_t fcon = NULL;
|
||||
|
||||
if (use_selinux() && label_hnd) {
|
||||
if (path[0] == '/') {
|
||||
r = selabel_lookup_raw(label_hnd, &fcon, path, mode);
|
||||
}
|
||||
else {
|
||||
char *cwd = NULL;
|
||||
char *newpath = NULL;
|
||||
cwd = getcwd(NULL,0);
|
||||
if ((! cwd) || (asprintf(&newpath, "%s/%s",cwd,path) < 0)) {
|
||||
free(cwd);
|
||||
return -errno;
|
||||
}
|
||||
r = selabel_lookup_raw(label_hnd, &fcon, newpath, mode);
|
||||
free(cwd);
|
||||
free(newpath);
|
||||
}
|
||||
|
||||
if (r == 0)
|
||||
r = setfscreatecon(fcon);
|
||||
|
||||
if ((r < 0) && (errno != ENOENT)) {
|
||||
log_error("Failed to set security context %s for %s", fcon, path);
|
||||
|
||||
if (security_getenforce() == 1)
|
||||
goto finish;
|
||||
}
|
||||
}
|
||||
r = mkdir(path, mode);
|
||||
|
||||
finish:
|
||||
if (use_selinux() && label_hnd) {
|
||||
setfscreatecon(NULL);
|
||||
freecon(fcon);
|
||||
}
|
||||
|
||||
return r;
|
||||
#else
|
||||
return mkdir(path, mode);
|
||||
#endif
|
||||
}
|
||||
#include "label.h"
|
||||
|
||||
bool streq_ptr(const char *a, const char *b) {
|
||||
|
||||
|
|
10
src/util.h
10
src/util.h
|
@ -361,14 +361,4 @@ int ip_tos_from_string(const char *s);
|
|||
const char *signal_to_string(int i);
|
||||
int signal_from_string(const char *s);
|
||||
|
||||
int label_init(void);
|
||||
int label_fix(const char *path);
|
||||
void label_finish(void);
|
||||
int label_socket_set(const char *label);
|
||||
void label_socket_clear(void);
|
||||
int label_fifofile_set(const char *label, const char *path);
|
||||
void label_file_clear(void);
|
||||
void label_free(const char *label);
|
||||
int label_get_socket_label_from_exe(const char *exe, char **label);
|
||||
|
||||
#endif
|
||||
|
|
Loading…
Reference in New Issue