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Code Issues Packages Projects Releases 1 Wiki Activity

Identify GMS process with app data dir

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Process name can never get trusted.
This commit is contained in:
Wang Han
2024-07-17 22:53:52 +08:00
committed by 5ec1cff
parent d4f3839ecf
commit a21ebd634e
1 changed files with 19 additions and 6 deletions
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25
module/src/main/cpp/zygisk/main.cpp
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@@ -20,8 +20,9 @@ public:
}
void preAppSpecialize(AppSpecializeArgs *args) override {
int enabled = 0;
api_->setOption(zygisk::DLCLOSE_MODULE_LIBRARY);
int enabled = 0;
{
auto fd = api_->connectCompanion();
if (fd >= 0) {
@@ -30,9 +31,19 @@ public:
}
}
if (!enabled) return;
const char *process = env_->GetStringUTFChars(args->nice_name, nullptr);
if (process == "com.google.android.gms.unstable"sv) {
LOGI("spoofing build vars in %s!", process);
if (args->app_data_dir == nullptr) {
return;
}
auto app_data_dir = env_->GetStringUTFChars(args->app_data_dir, nullptr);
auto nice_name = env_->GetStringUTFChars(args->nice_name, nullptr);
std::string_view process(nice_name);
std::string_view dir(app_data_dir);
if (dir.ends_with("/com.google.android.gms") &&
process == "com.google.android.gms.unstable") {
LOGI("spoofing build vars in GMS!");
auto buildClass = env_->FindClass("android/os/Build");
auto buildVersionClass = env_->FindClass("android/os/Build$VERSION");
@@ -43,7 +54,7 @@ public:
SET_FIELD(buildClass, "MANUFACTURER", "Google");
SET_FIELD(buildClass, "MODEL", "Pixel");
SET_FIELD(buildClass, "FINGERPRINT",
"google/sailfish/sailfish:8.1.0/OPM1.171019.011/4448085:user/release-keys");
"google/sailfish/sailfish:8.1.0/OPM1.171019.011/4448085:user/release-keys");
SET_FIELD(buildClass, "BRAND", "google");
SET_FIELD(buildClass, "PRODUCT", "sailfish");
SET_FIELD(buildClass, "DEVICE", "sailfish");
@@ -54,7 +65,9 @@ public:
SET_FIELD(buildClass, "TYPE", "user");
SET_FIELD(buildClass, "TAGS", "release-keys");
}
env_->ReleaseStringUTFChars(args->nice_name, process);
env_->ReleaseStringUTFChars(args->nice_name, nice_name);
env_->ReleaseStringUTFChars(args->app_data_dir, app_data_dir);
}
void preServerSpecialize(ServerSpecializeArgs *args) override {