mirror of
https://github.com/topjohnwu/Magisk.git
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91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/* pre_process.c - Some pre-processes for MagiskHide to hide properly
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <dirent.h>
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#include <string.h>
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#include <sys/mount.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <selinux/selinux.h>
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#include "magisk.h"
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#include "utils.h"
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#include "resetprop.h"
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#include "magiskhide.h"
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static char *prop_key[] =
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{ "ro.boot.verifiedbootstate", "ro.boot.flash.locked", "ro.boot.veritymode", "ro.boot.warranty_bit", "ro.warranty_bit",
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"ro.debuggable", "ro.secure", NULL };
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static char *prop_value[] =
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{ "green", "1", "enforcing", "0", "0", "0", "1", NULL };
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static int isMocked = 0;
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void manage_selinux() {
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if (isMocked) return;
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char val[1];
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int fd = xopen(ENFORCE_FILE, O_RDONLY);
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xxread(fd, val, 1);
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close(fd);
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// Permissive
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if (val[0] == '0') {
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LOGI("hide_daemon: Permissive detected, hide the state\n");
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chmod(ENFORCE_FILE, 0640);
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chmod(POLICY_FILE, 0440);
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isMocked = 1;
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}
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}
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void hide_sensitive_props() {
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LOGI("hide_pre_proc: Hiding sensitive props\n");
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// Hide all sensitive props
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char *value;
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for (int i = 0; prop_key[i]; ++i) {
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value = getprop(prop_key[i]);
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if (value) {
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if (strcmp(value, prop_value[i]) != 0)
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setprop2(prop_key[i], prop_value[i], 0);
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free(value);
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}
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}
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}
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void relink_sbin() {
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struct stat st;
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if (stat("/sbin_orig", &st) == -1 && errno == ENOENT) {
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// Re-link all binaries and bind mount
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DIR *dir;
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struct dirent *entry;
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char from[PATH_MAX], to[PATH_MAX];
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LOGI("hide_pre_proc: Re-linking /sbin\n");
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xmount(NULL, "/", NULL, MS_REMOUNT, NULL);
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xrename("/sbin", "/sbin_orig");
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xmkdir("/sbin", 0755);
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xchmod("/sbin", 0755);
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xmount(NULL, "/", NULL, MS_REMOUNT | MS_RDONLY, NULL);
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xmkdir("/dev/sbin_bind", 0755);
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xchmod("/dev/sbin_bind", 0755);
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dir = xopendir("/sbin_orig");
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while ((entry = xreaddir(dir))) {
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snprintf(from, sizeof(from), "%s/%s", "/sbin_orig", entry->d_name);
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snprintf(to, sizeof(to), "%s/%s", "/dev/sbin_bind", entry->d_name);
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symlink(from, to);
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lsetfilecon(to, "u:object_r:system_file:s0");
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}
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closedir(dir);
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xmount("/dev/sbin_bind", "/sbin", NULL, MS_BIND, NULL);
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}
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}
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