| /** |
| * 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. |
| */ |
| |
| #include <fstream> |
| #include <iostream> |
| #include <limits> |
| #include "../includes/common.h" |
| #include "aacdecoder.h" |
| #include "aacdecoder_lib.h" |
| #include "sbr_ram.h" |
| |
| constexpr uint8_t kNumberOfLayers = 1; |
| constexpr uint8_t kMaxChannelCount = 8; |
| bool kIsVulnerable = false; |
| |
| class Codec { |
| public: |
| Codec() = default; |
| ~Codec() { deInitDecoder(); } |
| bool initDecoder(); |
| void decodeFrames(UCHAR *data, UINT size); |
| void deInitDecoder(); |
| int validateQmfDomainBounds(); |
| |
| private: |
| HANDLE_AACDECODER mAacDecoderHandle = nullptr; |
| AAC_DECODER_ERROR mErrorCode = AAC_DEC_OK; |
| }; |
| |
| bool Codec::initDecoder() { |
| mAacDecoderHandle = aacDecoder_Open(TT_MP4_ADIF, kNumberOfLayers); |
| if (!mAacDecoderHandle) { |
| return false; |
| } |
| return true; |
| } |
| |
| void Codec::deInitDecoder() { |
| aacDecoder_Close(mAacDecoderHandle); |
| mAacDecoderHandle = nullptr; |
| } |
| |
| void Codec::decodeFrames(UCHAR *data, UINT size) { |
| while (size > 0) { |
| UINT inputSize = size; |
| UINT valid = size; |
| mErrorCode = aacDecoder_Fill(mAacDecoderHandle, &data, &inputSize, &valid); |
| if (mErrorCode != AAC_DEC_OK) { |
| ++data; |
| --size; |
| } else { |
| INT_PCM outputBuf[2048 * kMaxChannelCount]; |
| aacDecoder_DecodeFrame(mAacDecoderHandle, outputBuf, 2048 * kMaxChannelCount, 0); |
| if (valid >= inputSize) { |
| return; |
| } |
| UINT offset = inputSize - valid; |
| data += offset; |
| size = valid; |
| } |
| } |
| } |
| |
| int Codec::validateQmfDomainBounds() { |
| // Check OOB for qmfDomain |
| void *qmfDomainBound = &(mAacDecoderHandle->qmfModeCurr); |
| |
| HANDLE_SBRDECODER hSbrDecoder = mAacDecoderHandle->hSbrDecoder; |
| // Referring sbrDecoder_AssignQmfChannels2SbrChannels() |
| { |
| void *qmfDomainInChPtr = nullptr; |
| void *qmfDomainOutChPtr = nullptr; |
| int channel = 0; |
| int element = 0; |
| int absChOffset = 0; |
| for (element = 0; element < hSbrDecoder->numSbrElements; ++element) { |
| if (hSbrDecoder->pSbrElement[element] != NULL) { |
| for (channel = 0; channel < hSbrDecoder->pSbrElement[element]->nChannels; |
| ++channel) { |
| qmfDomainInChPtr = &hSbrDecoder->pQmfDomain->QmfDomainIn[absChOffset + channel]; |
| qmfDomainOutChPtr = |
| &hSbrDecoder->pQmfDomain->QmfDomainOut[absChOffset + channel]; |
| if (qmfDomainBound <= qmfDomainInChPtr || qmfDomainBound <= qmfDomainOutChPtr) { |
| kIsVulnerable = true; |
| } |
| } |
| absChOffset += hSbrDecoder->pSbrElement[element]->nChannels; |
| } |
| } |
| } |
| return kIsVulnerable ? EXIT_VULNERABLE : EXIT_SUCCESS; |
| } |
| |
| int main(int argc, char *argv[]) { |
| if (argc != 2) { |
| return EXIT_FAILURE; |
| } |
| |
| std::ifstream file; |
| file.open(argv[1], std::ios::in | std::ios::binary); |
| if (!file.is_open()) { |
| return EXIT_FAILURE; |
| } |
| file.ignore(std::numeric_limits<std::streamsize>::max()); |
| std::streamsize length = file.gcount(); |
| file.clear(); |
| file.seekg(0, std::ios_base::beg); |
| UCHAR *data = new UCHAR[length]; |
| file.read(reinterpret_cast<char *>(data), length); |
| file.close(); |
| |
| Codec codec = Codec(); |
| if (codec.initDecoder()) { |
| codec.decodeFrames(data, length); |
| } |
| return codec.validateQmfDomainBounds(); |
| } |