| /* |
| * Copyright (C) 2015 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. |
| */ |
| |
| #define LOG_TAG "AudioEffectBinderTest-JNI" |
| |
| #include <jni.h> |
| #include <media/AudioEffect.h> |
| #include <media/IEffect.h> |
| |
| using namespace android; |
| |
| /* |
| * Native methods used by |
| * cts/tests/tests/security/src/android/security/cts/AudioEffectBinderTest.java |
| */ |
| |
| struct EffectClient : public BnEffectClient { |
| EffectClient() { } |
| virtual void controlStatusChanged(bool controlGranted __unused) { } |
| virtual void enableStatusChanged(bool enabled __unused) { } |
| virtual void commandExecuted(uint32_t cmdCode __unused, |
| uint32_t cmdSize __unused, |
| void *pCmdData __unused, |
| uint32_t replySize __unused, |
| void *pReplyData __unused) { } |
| }; |
| |
| struct DeathRecipient : public IBinder::DeathRecipient { |
| DeathRecipient() : mDied(false) { } |
| virtual void binderDied(const wp<IBinder>& who __unused) { mDied = true; } |
| bool died() const { return mDied; } |
| bool mDied; |
| }; |
| |
| static bool isIEffectCommandSecure(IEffect *effect) |
| { |
| // some magic constants here |
| const int COMMAND_SIZE = 1024 + 12; // different than reply size to get different heap frag |
| char cmdData[COMMAND_SIZE]; |
| memset(cmdData, 0xde, sizeof(cmdData)); |
| |
| const int REPLY_DATA_SIZE = 256; |
| char replyData[REPLY_DATA_SIZE]; |
| bool secure = true; |
| for (int k = 0; k < 10; ++k) { |
| Parcel data; |
| data.writeInterfaceToken(effect->getInterfaceDescriptor()); |
| data.writeInt32(0); // 0 is EFFECT_CMD_INIT |
| data.writeInt32(sizeof(cmdData)); |
| data.write(cmdData, sizeof(cmdData)); |
| data.writeInt32(sizeof(replyData)); |
| |
| Parcel reply; |
| status_t status = effect->asBinder(effect)->transact(3, data, &reply); // 3 is COMMAND |
| ALOGV("transact status: %d", status); |
| if (status != NO_ERROR) { |
| ALOGW("invalid transaction status %d", status); |
| continue; |
| } |
| |
| ALOGV("reply data avail %zu", reply.dataAvail()); |
| status = reply.readInt32(); |
| ALOGV("reply status %d", status); |
| if (status == NO_ERROR) { |
| continue; |
| } |
| |
| int size = reply.readInt32(); |
| ALOGV("reply size %d", size); |
| if (size != sizeof(replyData)) { // we expect 0 or full reply data if command failed |
| ALOGW_IF(size != 0, "invalid reply size: %d", size); |
| continue; |
| } |
| |
| // Note that if reply.read() returns success, it should completely fill replyData. |
| status = reply.read(replyData, sizeof(replyData)); |
| if (status != NO_ERROR) { |
| ALOGW("invalid reply read - ignoring"); |
| continue; |
| } |
| unsigned int *out = (unsigned int *)replyData; |
| for (size_t index = 0; index < sizeof(replyData) / sizeof(*out); ++index) { |
| if (out[index] != 0) { |
| secure = false; |
| ALOGI("leaked data = %#08x", out[index]); |
| } |
| } |
| } |
| ALOGI("secure: %s", secure ? "YES" : "NO"); |
| return secure; |
| } |
| |
| static jboolean android_security_cts_AudioEffect_test_isCommandSecure() |
| { |
| const sp<IAudioFlinger> &audioFlinger = AudioSystem::get_audio_flinger(); |
| if (audioFlinger.get() == NULL) { |
| ALOGE("could not get audioflinger"); |
| return JNI_FALSE; |
| } |
| |
| static const effect_uuid_t EFFECT_UIID_EQUALIZER = // type |
| { 0x0bed4300, 0xddd6, 0x11db, 0x8f34, {0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b }}; |
| sp<EffectClient> effectClient(new EffectClient()); |
| effect_descriptor_t descriptor; |
| memset(&descriptor, 0, sizeof(descriptor)); |
| descriptor.type = EFFECT_UIID_EQUALIZER; |
| descriptor.uuid = *EFFECT_UUID_NULL; |
| const int32_t priority = 0; |
| const int sessionId = AUDIO_SESSION_OUTPUT_MIX; |
| const audio_io_handle_t io = 0; // AUDIO_IO_HANDLE_NONE |
| status_t status; |
| int32_t id; |
| int enabled; |
| sp<IEffect> effect = audioFlinger->createEffect(&descriptor, effectClient, |
| priority, io, sessionId, &status, &id, &enabled); |
| if (effect.get() == NULL || status != NO_ERROR) { |
| ALOGW("could not create effect"); |
| return JNI_TRUE; |
| } |
| |
| sp<DeathRecipient> deathRecipient(new DeathRecipient()); |
| effect->asBinder(effect)->linkToDeath(deathRecipient); |
| |
| // check exploit |
| if (!isIEffectCommandSecure(effect.get())) { |
| ALOGE("not secure!"); |
| return JNI_FALSE; |
| } |
| |
| sleep(1); // wait to check death |
| if (deathRecipient->died()) { |
| ALOGE("effect binder died"); |
| return JNI_FALSE; |
| } |
| return JNI_TRUE; |
| } |
| |
| int register_android_security_cts_AudioEffectBinderTest(JNIEnv *env) |
| { |
| static JNINativeMethod methods[] = { |
| { "native_test_isCommandSecure", "()Z", |
| (void *) android_security_cts_AudioEffect_test_isCommandSecure }, |
| }; |
| |
| jclass clazz = env->FindClass("android/security/cts/AudioEffectBinderTest"); |
| return env->RegisterNatives(clazz, methods, sizeof(methods) / sizeof(methods[0])); |
| } |