Extend recovery and updater to support setting file security contexts.
Extend minzip, recovery, and updater to set the security context on
files based on the file_contexts configuration included in the package.
Change-Id: Ied379f266a16c64f2b4dca15dc39b98fcce16f29
diff --git a/updater/Android.mk b/updater/Android.mk
index 2c51f99..f8ccb76 100644
--- a/updater/Android.mk
+++ b/updater/Android.mk
@@ -22,12 +22,13 @@
LOCAL_CFLAGS += -DUSE_EXT4
LOCAL_C_INCLUDES += system/extras/ext4_utils
LOCAL_STATIC_LIBRARIES += libext4_utils libz
+endif
+
ifeq ($(HAVE_SELINUX), true)
LOCAL_C_INCLUDES += external/libselinux/include
LOCAL_STATIC_LIBRARIES += libselinux
LOCAL_CFLAGS += -DHAVE_SELINUX
endif # HAVE_SELINUX
-endif
LOCAL_STATIC_LIBRARIES += $(TARGET_RECOVERY_UPDATER_LIBS) $(TARGET_RECOVERY_UPDATER_EXTRA_LIBS)
LOCAL_STATIC_LIBRARIES += libapplypatch libedify libmtdutils libminzip libz
diff --git a/updater/install.c b/updater/install.c
index 7b4b99b..a59c4ed 100644
--- a/updater/install.c
+++ b/updater/install.c
@@ -79,8 +79,24 @@
goto done;
}
+#ifdef HAVE_SELINUX
+ char *secontext = NULL;
+
+ if (sehandle) {
+ selabel_lookup(sehandle, &secontext, mount_point, 0755);
+ setfscreatecon(secontext);
+ }
+#endif
+
mkdir(mount_point, 0755);
+#ifdef HAVE_SELINUX
+ if (secontext) {
+ freecon(secontext);
+ setfscreatecon(NULL);
+ }
+#endif
+
if (strcmp(partition_type, "MTD") == 0) {
mtd_scan_partitions();
const MtdPartition* mtd;
@@ -177,25 +193,34 @@
}
-// format(fs_type, partition_type, location, fs_size)
+// format(fs_type, partition_type, location, fs_size, mount_point)
//
-// fs_type="yaffs2" partition_type="MTD" location=partition fs_size=<bytes>
-// fs_type="ext4" partition_type="EMMC" location=device fs_size=<bytes>
+// fs_type="yaffs2" partition_type="MTD" location=partition fs_size=<bytes> mount_point=<location>
+// fs_type="ext4" partition_type="EMMC" location=device fs_size=<bytes> mount_point=<location>
// if fs_size == 0, then make_ext4fs uses the entire partition.
// if fs_size > 0, that is the size to use
// if fs_size < 0, then reserve that many bytes at the end of the partition
+// mount_point is used with SELinux as the location of the mount point, absent otherwise
Value* FormatFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
- if (argc != 4) {
- return ErrorAbort(state, "%s() expects 4 args, got %d", name, argc);
+ if (argc != 4 && argc != 5) {
+ return ErrorAbort(state, "%s() expects 4 or 5 args, got %d", name, argc);
}
char* fs_type;
char* partition_type;
char* location;
char* fs_size;
+ char* mount_point = NULL;
+
+#ifdef HAVE_SELINUX
+ if (ReadArgs(state, argv, 5, &fs_type, &partition_type, &location, &fs_size, &mount_point) < 0) {
+ return NULL;
+ }
+#else
if (ReadArgs(state, argv, 4, &fs_type, &partition_type, &location, &fs_size) < 0) {
return NULL;
}
+#endif
if (strlen(fs_type) == 0) {
ErrorAbort(state, "fs_type argument to %s() can't be empty", name);
@@ -211,6 +236,13 @@
goto done;
}
+#ifdef HAVE_SELINUX
+ if (!mount_point || strlen(mount_point) == 0) {
+ ErrorAbort(state, "mount_point argument to %s() can't be empty", name);
+ goto done;
+ }
+#endif
+
if (strcmp(partition_type, "MTD") == 0) {
mtd_scan_partitions();
const MtdPartition* mtd = mtd_find_partition_by_name(location);
@@ -240,7 +272,7 @@
result = location;
#ifdef USE_EXT4
} else if (strcmp(fs_type, "ext4") == 0) {
- int status = make_ext4fs(location, atoll(fs_size));
+ int status = make_ext4fs(location, atoll(fs_size), mount_point, sehandle);
if (status != 0) {
fprintf(stderr, "%s: make_ext4fs failed (%d) on %s",
name, status, location);
@@ -347,7 +379,7 @@
bool success = mzExtractRecursive(za, zip_path, dest_path,
MZ_EXTRACT_FILES_ONLY, ×tamp,
- NULL, NULL);
+ NULL, NULL, sehandle);
free(zip_path);
free(dest_path);
return StringValue(strdup(success ? "t" : ""));
diff --git a/updater/updater.c b/updater/updater.c
index aa626d2..5f15808 100644
--- a/updater/updater.c
+++ b/updater/updater.c
@@ -32,6 +32,8 @@
// (Note it's "updateR-script", not the older "update-script".)
#define SCRIPT_NAME "META-INF/com/google/android/updater-script"
+struct selabel_handle *sehandle;
+
int main(int argc, char** argv) {
// Various things log information to stdout or stderr more or less
// at random. The log file makes more sense if buffering is
@@ -103,6 +105,19 @@
return 6;
}
+#ifdef HAVE_SELINUX
+ struct selinux_opt seopts[] = {
+ { SELABEL_OPT_PATH, "/file_contexts" }
+ };
+
+ sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1);
+
+ if (!sehandle) {
+ fprintf(stderr, "Warning: No file_contexts\n");
+ fprintf(cmd_pipe, "ui_print Warning: No file_contexts\n");
+ }
+#endif
+
// Evaluate the parsed script.
UpdaterInfo updater_info;
diff --git a/updater/updater.h b/updater/updater.h
index bd60dc1..a00872c 100644
--- a/updater/updater.h
+++ b/updater/updater.h
@@ -20,10 +20,19 @@
#include <stdio.h>
#include "minzip/Zip.h"
+#ifdef HAVE_SELINUX
+#include <selinux/selinux.h>
+#include <selinux/label.h>
+#else
+struct selabel_handle;
+#endif
+
typedef struct {
FILE* cmd_pipe;
ZipArchive* package_zip;
int version;
} UpdaterInfo;
+extern struct selabel_handle *sehandle;
+
#endif