mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-12-01 05:55:26 +00:00
90 lines
2.2 KiB
C++
90 lines
2.2 KiB
C++
#include <sys/mount.h>
|
|
|
|
#include <magisk.h>
|
|
#include <utils.h>
|
|
#include <selinux.h>
|
|
#include <resetprop.h>
|
|
|
|
#include "magiskhide.h"
|
|
|
|
using namespace std;
|
|
|
|
static const char *prop_key[] =
|
|
{ "ro.boot.vbmeta.device_state", "ro.boot.verifiedbootstate", "ro.boot.flash.locked",
|
|
"ro.boot.veritymode", "ro.boot.warranty_bit", "ro.warranty_bit", "ro.debuggable",
|
|
"ro.secure", "ro.build.type", "ro.build.tags", "ro.build.selinux", nullptr };
|
|
|
|
static const char *prop_value[] =
|
|
{ "locked", "green", "1",
|
|
"enforcing", "0", "0", "0",
|
|
"1", "user", "release-keys", "0", nullptr };
|
|
|
|
void hide_sensitive_props() {
|
|
LOGI("hide_policy: Hiding sensitive props\n");
|
|
|
|
// Hide all sensitive props
|
|
for (int i = 0; prop_key[i]; ++i) {
|
|
auto value = getprop(prop_key[i]);
|
|
if (!value.empty() && value != prop_value[i])
|
|
setprop(prop_key[i], prop_value[i], false);
|
|
}
|
|
}
|
|
|
|
static inline void lazy_unmount(const char* mountpoint) {
|
|
if (umount2(mountpoint, MNT_DETACH) != -1)
|
|
LOGD("hide_policy: Unmounted (%s)\n", mountpoint);
|
|
}
|
|
|
|
void hide_daemon(int pid) {
|
|
run_finally fin([=]() -> void {
|
|
// Send resume signal
|
|
kill(pid, SIGCONT);
|
|
_exit(0);
|
|
});
|
|
hide_unmount(pid);
|
|
}
|
|
|
|
#define TMPFS_MNT(dir) (mentry->mnt_type == "tmpfs"sv && \
|
|
strncmp(mentry->mnt_dir, "/" #dir, sizeof("/" #dir) - 1) == 0)
|
|
|
|
void hide_unmount(int pid) {
|
|
if (switch_mnt_ns(pid))
|
|
return;
|
|
|
|
LOGD("hide_policy: handling PID=[%d]\n", pid);
|
|
|
|
char val;
|
|
int fd = xopen(SELINUX_ENFORCE, O_RDONLY);
|
|
xxread(fd, &val, sizeof(val));
|
|
close(fd);
|
|
// Permissive
|
|
if (val == '0') {
|
|
chmod(SELINUX_ENFORCE, 0640);
|
|
chmod(SELINUX_POLICY, 0440);
|
|
}
|
|
|
|
vector<string> targets;
|
|
|
|
// Unmount dummy skeletons and /sbin links
|
|
parse_mnt("/proc/self/mounts", [&](mntent *mentry) {
|
|
if (TMPFS_MNT(system) || TMPFS_MNT(vendor) || TMPFS_MNT(sbin) || TMPFS_MNT(product))
|
|
targets.emplace_back(mentry->mnt_dir);
|
|
return true;
|
|
});
|
|
|
|
for (auto &s : targets)
|
|
lazy_unmount(s.data());
|
|
targets.clear();
|
|
|
|
// Unmount all Magisk created mounts
|
|
parse_mnt("/proc/self/mounts", [&](mntent *mentry) {
|
|
if (strstr(mentry->mnt_fsname, BLOCKDIR))
|
|
targets.emplace_back(mentry->mnt_dir);
|
|
return true;
|
|
});
|
|
|
|
for (auto &s : targets)
|
|
lazy_unmount(s.data());
|
|
}
|
|
|