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Implement MagiskHide through code injection

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topjohnwu
2021-01-12 03:28:00 -08:00
parent d2acd59ea8
commit 9a28dd4f6e
8 changed files with 166 additions and 47 deletions
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35
native/jni/magiskhide/hide_utils.cpp
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@ -274,7 +274,7 @@ int launch_magiskhide(bool late_props) {
if (hide_state)
return HIDE_IS_ENABLED;
if (access("/proc/1/ns/mnt", F_OK) != 0)
if (access("/proc/self/ns/mnt", F_OK) != 0)
return HIDE_NO_NS;
if (procfp == nullptr && (procfp = opendir("/proc")) == nullptr)
@ -344,3 +344,36 @@ void test_proc_monitor() {
proc_monitor();
}
#endif
int check_uid_map(int client) {
mutex_guard lock(hide_state_lock);
if (!hide_state)
return 0;
int uid = read_int(client);
string process = read_string(client);
if (uid % 100000 > 90000) {
// Isolated process
auto it = uid_proc_map.find(-1);
if (it == uid_proc_map.end())
return 0;
for (auto &s : it->second) {
if (str_starts(process, s))
return 1;
}
} else {
auto it = uid_proc_map.find(uid);
if (it == uid_proc_map.end())
return 0;
for (auto &s : it->second) {
if (process == s)
return 1;
}
}
return 0;
}