new applets: selinux utils by KaiGai Kohei <kaigai@kaigai.gr.jp>

Config.in

@@ -493,3 +493,4 @@ source procps/Config.in
 source shell/Config.in
 source sysklogd/Config.in
 source runit/Config.in
+source selinux/Config.in

Makefile

@@ -442,6 +442,7 @@ libs-y		:= \
 		networking/udhcp/ \
 		procps/ \
 		runit/ \
+		selinux/ \
 		shell/ \
 		sysklogd/ \
 		util-linux/ \

Makefile.flags

@@ -54,4 +54,8 @@ endif
 ifeq ($(CONFIG_STATIC),y)
 LDFLAGS += -static
 endif
+
+ifeq ($(CONFIG_SELINUX),y)
+LDFLAGS += -lselinux -lsepol
+endif
 #LDFLAGS += -nostdlib

include/applets.h

@@ -133,7 +133,9 @@ USE_FSCK_MINIX(APPLET_ODDNAME(fsck.minix, fsck_minix, _BB_DIR_SBIN, _BB_SUID_NEV
 USE_FTPGET(APPLET_ODDNAME(ftpget, ftpgetput, _BB_DIR_USR_BIN, _BB_SUID_NEVER,ftpget))
 USE_FTPPUT(APPLET_ODDNAME(ftpput, ftpgetput, _BB_DIR_USR_BIN, _BB_SUID_NEVER,ftpput))
 USE_FUSER(APPLET(fuser, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
+USE_GETENFORCE(APPLET(getenforce, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_GETOPT(APPLET(getopt, _BB_DIR_BIN, _BB_SUID_NEVER))
+USE_GETSEBOOL(APPLET(getsebool, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_GETTY(APPLET(getty, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_GREP(APPLET(grep, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_GUNZIP(APPLET(gunzip, _BB_DIR_BIN, _BB_SUID_NEVER))
@@ -187,6 +189,7 @@ USE_LS(APPLET(ls, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_LSATTR(APPLET(lsattr, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_LSMOD(APPLET(lsmod, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_UNLZMA(APPLET_ODDNAME(lzmacat, unlzma, _BB_DIR_USR_BIN, _BB_SUID_NEVER, lzmacat))
+USE_MATCHPATHCON(APPLET(matchpathcon, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_MAKEDEVS(APPLET(makedevs, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_MD5SUM(APPLET_ODDNAME(md5sum, md5_sha1_sum, _BB_DIR_USR_BIN, _BB_SUID_NEVER, md5sum))
 USE_MDEV(APPLET(mdev, _BB_DIR_SBIN, _BB_SUID_NEVER))
@@ -249,10 +252,12 @@ USE_RUNLEVEL(APPLET(runlevel, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_RUNSV(APPLET(runsv, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_RUNSVDIR(APPLET(runsvdir, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_RX(APPLET(rx, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
+USE_SELINUXENABLED(APPLET(selinuxenabled, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_SED(APPLET(sed, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_SEQ(APPLET(seq, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_SETARCH(APPLET(setarch, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_SETCONSOLE(APPLET(setconsole, _BB_DIR_SBIN, _BB_SUID_NEVER))
+USE_SETENFORCE(APPLET(setenforce, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_SETKEYCODES(APPLET(setkeycodes, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_SETLOGCONS(APPLET(setlogcons, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_SETSID(APPLET(setsid, _BB_DIR_USR_BIN, _BB_SUID_NEVER))

include/libbb.h

@@ -592,6 +592,7 @@ extern void run_shell(const char *shell, int loginshell, const char *command, co
 extern void renew_current_security_context(void);
 extern void set_current_security_context(security_context_t sid);
 #endif
+extern void selinux_or_die(void);
 extern int restricted_shell(const char *shell);
 extern void setup_environment(const char *shell, int loginshell, int changeenv, const struct passwd *pw);
 extern int correct_password(const struct passwd *pw);

include/usage.h

@@ -1013,6 +1013,9 @@
        "	-6	When using port/proto only search IPv6 space\n" \
        "	-SIGNAL	When used with -k, this signal will be used to kill"
 
+#define getenforce_trivial_usage
+#define getenforce_full_usage
+
 #define getopt_trivial_usage \
        "[OPTIONS]..."
 #define getopt_full_usage \
@@ -1047,6 +1050,11 @@
        " esac\n" \
        "done\n"
 
+#define getsebool_trivial_usage \
+       "-a or getsebool boolean..."
+#define getsebool_full_usage \
+       "	-a	Show all SELinux booleans"
+
 #define getty_trivial_usage \
        "[OPTIONS]... baud_rate,... line [termtype]"
 #define getty_full_usage \
@@ -1896,6 +1904,15 @@
        "/dev/hda[0-15]\n"
 #endif
 
+#define matchpathcon_trivial_usage \
+       "[-n] [-N] [-f file_contexts_file] [-p prefix] [-V]"
+#define matchpathcon_full_usage \
+       "	-n	Do not display path" \
+       "\n	-N	Do not use translations" \
+       "\n	-f	Use alternate file_context file" \
+       "\n	-p	Use prefix to speed translations" \
+       "\n	-V	Verify file context on disk matches defaults"
+
 #define md5sum_trivial_usage \
        "[OPTION] [FILEs...]" \
 	USE_FEATURE_MD5_SHA1_SUM_CHECK("\n   or: md5sum [OPTION] -c [FILE]")
@@ -2714,6 +2731,9 @@
        "$ echo \"foo\" | sed -e 's/f[a-zA-Z]o/bar/g'\n" \
        "bar\n"
 
+#define selinuxenabled_trivial_usage
+#define selinuxenabled_full_usage
+
 #define seq_trivial_usage \
        "[first [increment]] last"
 #define seq_full_usage \
@@ -2731,6 +2751,10 @@
        "\n\nOptions:\n" \
        "	-r	Reset output to /dev/console"
 
+#define setenforce_trivial_usage \
+       "[ Enforcing | Permissive | 1 | 0 ]"
+#define setenforce_full_usage
+
 #define setkeycodes_trivial_usage \
        "SCANCODE KEYCODE ..."
 #define setkeycodes_full_usage \
@@ -3449,12 +3473,12 @@
 #define vconfig_full_usage \
        "Create and remove virtual ethernet devices" \
        "\n\nOptions:\n" \
-       "	add             [interface-name] [vlan_id]\n" \
+       "	add		[interface-name] [vlan_id]\n" \
-       "	rem             [vlan-name]\n" \
+       "	rem		[vlan-name]\n" \
-       "	set_flag        [interface-name] [flag-num]       [0 | 1]\n" \
+       "	set_flag	[interface-name] [flag-num] [0 | 1]\n" \
-       "	set_egress_map  [vlan-name]      [skb_priority]   [vlan_qos]\n" \
+       "	set_egress_map	[vlan-name] [skb_priority] [vlan_qos]\n" \
-       "	set_ingress_map [vlan-name]      [skb_priority]   [vlan_qos]\n" \
+       "	set_ingress_map	[vlan-name] [skb_priority] [vlan_qos]\n" \
-       "	set_name_type   [name-type]"
+       "	set_name_type	[name-type]"
 
 #define vi_trivial_usage \
        "[OPTION] [FILE]..."
@@ -3569,9 +3593,9 @@
 #define zcip_full_usage \
        "Manage a ZeroConf IPv4 link-local address" \
        "\n\nOptions:\n" \
-       "	-f              foreground mode\n" \
+       "	-f		Foreground mode\n" \
-       "	-q              quit after address (no daemon)\n" \
+       "	-q		Quit after address (no daemon)\n" \
-       "	-r 169.254.x.x  request this address first\n" \
+       "	-r 169.254.x.x	Request this address first\n" \
-       "	-v              verbose"
+       "	-v		Verbose"
 
 #endif /* __BB_USAGE_H__ */

libbb/xfuncs.c

@@ -570,6 +570,21 @@ void xstat(const char *name, struct stat *stat_buf)
 		bb_perror_msg_and_die("can't stat '%s'", name);
 }
 
+// selinux_or_die() - die if SELinux is disabled.
+void selinux_or_die(void)
+{
+#if ENABLE_SELINUX
+	int rc = is_selinux_enabled();
+	if (rc == 0) {
+		bb_error_msg_and_die("SELinux is disabled");
+	} else if (rc < 0) {
+		bb_error_msg_and_die("is_selinux_enabled() failed");
+	}
+#else
+	bb_error_msg_and_die("SELinux support is disabled");
+#endif
+}
+
 /* It is perfectly ok to pass in a NULL for either width or for
  * height, in which case that value will not be set.  */
 int get_terminal_width_height(const int fd, int *width, int *height)

selinux/Config.in

@@ -0,0 +1,47 @@
+#
+# For a description of the syntax of this configuration file,
+# see scripts/kbuild/config-language.txt.
+#
+
+menu "Selinux Utilities"
+	depends on SELINUX
+
+config GETENFORCE
+	bool "getenforce"
+	default n
+	depends on SELINUX
+	help
+	  Enable support to get the current mode of SELinux.
+
+config GETSEBOOL
+	bool "getsebool"
+	default n
+	depends on SELINUX
+	help
+	  Enable support to get SELinux boolean values.
+
+config MATCHPATHCON
+	bool "matchpathcon"
+	default n
+	depends on SELINUX
+	help
+	  Enable support to get default security context of the
+	  specified path from the file contexts configuration.
+
+config SELINUXENABLED
+	bool "selinuxenabled"
+	default n
+	depends on SELINUX
+	help
+	  Enable support for this command to be used within shell scripts
+	  to determine if selinux is enabled.
+
+config SETENFORCE
+	bool "setenforce"
+	default n
+	depends on SELINUX
+	help
+	  Enable support to modify the mode SELinux is running in.
+
+endmenu
+

selinux/Kbuild

@@ -0,0 +1,13 @@
+# Makefile for busybox
+#
+# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
+# Copyright (C) 2007 by KaiGai Kohei <kaigai@kaigai.gr.jp>
+#
+# Licensed under the GPL v2, see the file LICENSE in this tarball.
+
+lib-y:=
+lib-$(CONFIG_GETENFORCE)	+= getenforce.o
+lib-$(CONFIG_GETSEBOOL)		+= getsebool.o
+lib-$(CONFIG_MATCHPATHCON)	+= matchpathcon.o
+lib-$(CONFIG_SELINUXENABLED)	+= selinuxenabled.o
+lib-$(CONFIG_SETENFORCE)	+= setenforce.o

selinux/getenforce.c

@@ -0,0 +1,33 @@
+/*
+ * getenforce
+ *
+ * Based on libselinux 1.33.1
+ * Port to BusyBox  Hiroshi Shinji <shiroshi@my.email.ne.jp>
+ *
+ */
+
+#include "busybox.h"
+
+int getenforce_main(int argc, char **argv)
+{
+	int rc;
+
+	rc = is_selinux_enabled();
+	if (rc < 0)
+		bb_error_msg_and_die("is_selinux_enabled() failed");
+
+	if (rc == 1) {
+		rc = security_getenforce();
+		if (rc < 0)
+			bb_error_msg_and_die("getenforce() failed");
+
+		if (rc)
+			puts("Enforcing");
+		else
+			puts("Permissive");
+	} else {
+		puts("Disabled");
+	}
+
+	return 0;
+}

selinux/getsebool.c

@@ -0,0 +1,65 @@
+/*
+ * getsebool
+ *
+ * Based on libselinux 1.33.1
+ * Port to BusyBox  Hiroshi Shinji <shiroshi@my.email.ne.jp>
+ *
+ */
+
+#include "busybox.h"
+
+int getsebool_main(int argc, char **argv)
+{
+	int i, rc = 0, active, pending, len = 0;
+	char **names;
+	unsigned opt;
+
+	selinux_or_die();
+	opt = getopt32(argc, argv, "a");
+
+	if (opt) { /* -a */
+		if (argc > 2)
+			bb_show_usage();
+
+		rc = security_get_boolean_names(&names, &len);
+		if (rc)
+			bb_perror_msg_and_die("cannot get boolean names");
+
+		if (!len) {
+			puts("No booleans");
+			return 0;
+		}
+	}
+
+	if (!len) {
+		if (argc < 2)
+			bb_show_usage();
+		len = argc - 1;
+		names = xmalloc(sizeof(char *) * len);
+		for (i = 0; i < len; i++)
+			names[i] = xstrdup(argv[i + 1]);
+	}
+
+	for (i = 0; i < len; i++) {
+		active = security_get_boolean_active(names[i]);
+		if (active < 0) {
+			bb_error_msg_and_die("error getting active value for %s", names[i]);
+		}
+		pending = security_get_boolean_pending(names[i]);
+		if (pending < 0) {
+			bb_error_msg_and_die("error getting pending value for %s", names[i]);
+		}
+		printf("%s --> %s", names[i], (active ? "on" : "off"));
+		if (pending != active)
+			printf(" pending: %s", (pending ? "on" : "off"));
+		putchar('\n');
+	}
+
+	if (ENABLE_FEATURE_CLEAN_UP) {
+		for (i = 0; i < len; i++)
+			free(names[i]);
+		free(names);
+	}
+
+	return rc;
+}

selinux/matchpathcon.c

@@ -0,0 +1,85 @@
+/* matchpathcon  -  get the default security context for the specified
+ *                  path from the file contexts configuration.
+ *                  based on libselinux-1.32
+ * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
+ *
+ */
+#include "busybox.h"
+
+static int print_matchpathcon(char *path, int noprint)
+{
+	char *buf;
+	int rc = matchpathcon(path, 0, &buf);
+	if (rc < 0) {
+		bb_perror_msg("matchpathcon(%s) failed", path);
+		return 1;
+	}
+	if (!noprint)
+		printf("%s\t%s\n", path, buf);
+	else
+		printf("%s\n", buf);
+
+	freecon(buf);
+	return 0;
+}
+
+#define OPT_NOT_PRINT   (1<<0)  /* -n */
+#define OPT_NOT_TRANS   (1<<1)  /* -N */
+#define OPT_FCONTEXT    (1<<2)  /* -f */
+#define OPT_PREFIX      (1<<3)  /* -p */
+#define OPT_VERIFY      (1<<4)  /* -V */
+
+int matchpathcon_main(int argc, char **argv)
+{
+	int error = 0;
+	unsigned opts;
+	char *fcontext, *prefix, *path;
+
+	opt_complementary = "-1:" /* at least one param reqd */
+		"f--p:p--f"; /* mutually exclusive */
+	opts = getopt32(argc, argv, "nNf:p:V", &fcontext, &prefix);
+	argv += optind;
+
+	if (opts & OPT_NOT_TRANS) {
+		set_matchpathcon_flags(NOTRANS);
+	}
+	if (opts & OPT_FCONTEXT) {
+		if (matchpathcon_init(fcontext))
+			bb_perror_msg_and_die("error while processing %s", fcontext);
+	}
+	if (opts & OPT_PREFIX) {
+		if (matchpathcon_init_prefix(NULL, prefix))
+			bb_perror_msg_and_die("error while processing %s", prefix);
+	}
+
+	while((path = *argv++) != NULL) {
+		security_context_t con;
+		int rc;
+
+		if (!(opts & OPT_VERIFY)) {
+			error += print_matchpathcon(path, opt & OPT_NOT_PRINT);
+			continue;
+		}
+
+		if (selinux_file_context_verify(path, 0)) {
+			printf("%s verified\n", path);
+			continue;
+		}
+
+		if (opts & OPT_NOT_TRANS)
+			rc = lgetfilecon_raw(path, &con);
+		else
+			rc = lgetfilecon(path, &con);
+
+		if (rc >= 0) {
+			printf("%s has context %s, should be ", path, con);
+			error += print_matchpathcon(path, 1);
+			freecon(con);
+			continue;
+		}
+		printf("actual context unknown: %s, should be ", strerror(errno));
+		error += print_matchpathcon(path, 1);
+	}
+	matchpathcon_fini();
+	return error;
+}

selinux/selinuxenabled.c

@@ -0,0 +1,13 @@
+/*
+ * selinuxenabled
+ * 
+ * Based on libselinux 1.33.1
+ * Port to BusyBox  Hiroshi Shinji <shiroshi@my.email.ne.jp>
+ *
+ */
+#include "busybox.h"
+
+int selinuxenabled_main(int argc, char **argv)
+{
+	return !is_selinux_enabled();
+}

selinux/setenforce.c

@@ -0,0 +1,44 @@
+/*
+ * setenforce
+ *
+ * Based on libselinux 1.33.1
+ * Port to BusyBox  Hiroshi Shinji <shiroshi@my.email.ne.jp>
+ *
+ */
+
+#include "busybox.h"
+
+static const smallint setenforce_mode[] = {
+	0,
+	1,
+	0,
+	1,
+};
+static const char *const setenforce_cmd[] = {
+	"0",
+	"1",
+	"permissive",
+	"enforcing",
+	NULL,
+};
+
+int setenforce_main(int argc, char **argv)
+{
+	int i, rc;
+
+	if (argc != 2)
+		bb_show_usage();
+
+	selinux_or_die();
+
+	for (i = 0; setenforce_cmd[i]; i++) {
+		if (strcasecmp(argv[1], setenforce_cmd[i]) != 0)
+			continue;
+		rc = security_setenforce(setenforce_mode[i]);
+		if (rc < 0)
+			bb_perror_msg_and_die("setenforce() failed");
+		return 0;
+	}
+
+	bb_show_usage();
+}