Add NDK PermissionManager checkPermission
bug: 172283477
bug: 159172726
Change-Id: I532722772f6a86ef4f94a95146df34603278bb45
diff --git a/include/android/permission_manager.h b/include/android/permission_manager.h
new file mode 100644
index 0000000..7817126
--- /dev/null
+++ b/include/android/permission_manager.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_PERMISSION_MANAGER_H
+#define ANDROID_PERMISSION_MANAGER_H
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+/**
+ * Permission check results.
+ *
+ * Introduced in API 31.
+ */
+enum {
+ /**
+ * This is returned by APermissionManager_checkPermission()
+ * if the permission has been granted to the given package.
+ */
+ PERMISSION_MANAGER_PERMISSION_GRANTED = 0,
+ /**
+ * This is returned by APermissionManager_checkPermission()
+ * if the permission has not been granted to the given package.
+ */
+ PERMISSION_MANAGER_PERMISSION_DENIED = -1,
+};
+
+/**
+ * Permission check return status values.
+ *
+ * Introduced in API 31.
+ */
+enum {
+ /**
+ * This is returned if the permission check completed without errors.
+ * The output result is valid and contains one of {PERMISSION_MANAGER_PERMISSION_GRANTED,
+ * PERMISSION_MANAGER_PERMISSION_DENIED}.
+ */
+ PERMISSION_MANAGER_STATUS_OK = 0,
+ /**
+ * This is returned if the permission check encountered an unspecified error.
+ * The output result is unmodified.
+ */
+ PERMISSION_MANAGER_STATUS_ERROR_UNKNOWN = -1,
+ /**
+ * This is returned if the permission check failed because the service is
+ * unavailable. The output result is unmodified.
+ */
+ PERMISSION_MANAGER_STATUS_SERVICE_UNAVAILABLE = -2,
+};
+
+#if __ANDROID_API__ >= 31
+
+/**
+ * Checks whether the package with the given pid/uid has been granted a permission.
+ *
+ * Note that the Java API of Context#checkPermission() is usually faster due to caching,
+ * thus is preferred over this API wherever possible.
+ *
+ * @param permission the permission to be checked.
+ * @param pid the process id of the package to be checked.
+ * @param uid the uid of the package to be checked.
+ * @param outResult output of the permission check result.
+ *
+ * @return error codes if any error happened during the check.
+ */
+int32_t APermissionManager_checkPermission(const char* permission,
+ pid_t pid,
+ uid_t uid,
+ int32_t* outResult) __INTRODUCED_IN(31);
+
+#endif // __ANDROID_API__ >= 31
+
+__END_DECLS
+
+#endif // ANDROID_PERMISSION_MANAGER_H
diff --git a/libs/binder/ActivityManager.cpp b/libs/binder/ActivityManager.cpp
index 5e4c98f..727ea60 100644
--- a/libs/binder/ActivityManager.cpp
+++ b/libs/binder/ActivityManager.cpp
@@ -17,6 +17,7 @@
#include <mutex>
#include <unistd.h>
+#include <android/permission_manager.h>
#include <binder/ActivityManager.h>
#include <binder/Binder.h>
#include <binder/IServiceManager.h>
@@ -98,6 +99,18 @@
return PROCESS_STATE_UNKNOWN;
}
+status_t ActivityManager::checkPermission(const String16& permission,
+ const pid_t pid,
+ const uid_t uid,
+ int32_t* outResult) {
+ sp<IActivityManager> service = getService();
+ if (service != nullptr) {
+ return service->checkPermission(permission, pid, uid, outResult);
+ }
+ // ActivityManagerService appears dead. Return usual error code for dead service.
+ return DEAD_OBJECT;
+}
+
status_t ActivityManager::linkToDeath(const sp<IBinder::DeathRecipient>& recipient) {
sp<IActivityManager> service = getService();
if (service != nullptr) {
diff --git a/libs/binder/IActivityManager.cpp b/libs/binder/IActivityManager.cpp
index 1eb5363..e9f5aae 100644
--- a/libs/binder/IActivityManager.cpp
+++ b/libs/binder/IActivityManager.cpp
@@ -17,9 +17,11 @@
#include <unistd.h>
#include <fcntl.h>
+#include <android/permission_manager.h>
#include <binder/ActivityManager.h>
#include <binder/IActivityManager.h>
#include <binder/Parcel.h>
+#include <utils/Errors.h>
namespace android {
@@ -104,6 +106,23 @@
}
return reply.readInt32();
}
+
+ virtual status_t checkPermission(const String16& permission,
+ const pid_t pid,
+ const uid_t uid,
+ int32_t* outResult) {
+ Parcel data, reply;
+ data.writeInterfaceToken(IActivityManager::getInterfaceDescriptor());
+ data.writeString16(permission);
+ data.writeInt32(pid);
+ data.writeInt32(uid);
+ status_t err = remote()->transact(CHECK_PERMISSION_TRANSACTION, data, &reply);
+ if (err != NO_ERROR || ((err = reply.readExceptionCode()) != NO_ERROR)) {
+ return err;
+ }
+ *outResult = reply.readInt32();
+ return NO_ERROR;
+ }
};
// ------------------------------------------------------------------------------------
diff --git a/libs/binder/include/binder/ActivityManager.h b/libs/binder/include/binder/ActivityManager.h
index 9108e31..6796723 100644
--- a/libs/binder/include/binder/ActivityManager.h
+++ b/libs/binder/include/binder/ActivityManager.h
@@ -77,9 +77,9 @@
void unregisterUidObserver(const sp<IUidObserver>& observer);
bool isUidActive(const uid_t uid, const String16& callingPackage);
int getUidProcessState(const uid_t uid, const String16& callingPackage);
+ status_t checkPermission(const String16& permission, const pid_t pid, const uid_t uid, int32_t* outResult);
-
- status_t linkToDeath(const sp<IBinder::DeathRecipient>& recipient);
+ status_t linkToDeath(const sp<IBinder::DeathRecipient>& recipient);
status_t unlinkToDeath(const sp<IBinder::DeathRecipient>& recipient);
private:
diff --git a/libs/binder/include/binder/IActivityManager.h b/libs/binder/include/binder/IActivityManager.h
index e0248f6..4573347 100644
--- a/libs/binder/include/binder/IActivityManager.h
+++ b/libs/binder/include/binder/IActivityManager.h
@@ -39,13 +39,18 @@
virtual void unregisterUidObserver(const sp<IUidObserver>& observer) = 0;
virtual bool isUidActive(const uid_t uid, const String16& callingPackage) = 0;
virtual int32_t getUidProcessState(const uid_t uid, const String16& callingPackage) = 0;
+ virtual status_t checkPermission(const String16& permission,
+ const pid_t pid,
+ const uid_t uid,
+ int32_t* outResult) = 0;
enum {
OPEN_CONTENT_URI_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
REGISTER_UID_OBSERVER_TRANSACTION,
UNREGISTER_UID_OBSERVER_TRANSACTION,
IS_UID_ACTIVE_TRANSACTION,
- GET_UID_PROCESS_STATE_TRANSACTION
+ GET_UID_PROCESS_STATE_TRANSACTION,
+ CHECK_PERMISSION_TRANSACTION,
};
};