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131 lines
4.0 KiB
131 lines
4.0 KiB
/**
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <fstream>
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#include <iostream>
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#include <limits>
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#include "../includes/common.h"
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#include "aacdecoder.h"
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#include "aacdecoder_lib.h"
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#include "sbr_ram.h"
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constexpr uint8_t kNumberOfLayers = 1;
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constexpr uint8_t kMaxChannelCount = 8;
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bool kIsVulnerable = false;
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class Codec {
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public:
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Codec() = default;
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~Codec() { deInitDecoder(); }
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bool initDecoder();
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void decodeFrames(UCHAR *data, UINT size);
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void deInitDecoder();
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int validateQmfDomainBounds();
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private:
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HANDLE_AACDECODER mAacDecoderHandle = nullptr;
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AAC_DECODER_ERROR mErrorCode = AAC_DEC_OK;
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};
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bool Codec::initDecoder() {
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mAacDecoderHandle = aacDecoder_Open(TT_MP4_ADIF, kNumberOfLayers);
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if (!mAacDecoderHandle) {
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return false;
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}
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return true;
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}
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void Codec::deInitDecoder() {
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aacDecoder_Close(mAacDecoderHandle);
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mAacDecoderHandle = nullptr;
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}
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void Codec::decodeFrames(UCHAR *data, UINT size) {
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while (size > 0) {
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UINT inputSize = size;
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UINT valid = size;
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mErrorCode = aacDecoder_Fill(mAacDecoderHandle, &data, &inputSize, &valid);
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if (mErrorCode != AAC_DEC_OK) {
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++data;
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--size;
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} else {
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INT_PCM outputBuf[2048 * kMaxChannelCount];
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aacDecoder_DecodeFrame(mAacDecoderHandle, outputBuf, 2048 * kMaxChannelCount, 0);
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if (valid >= inputSize) {
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return;
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}
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UINT offset = inputSize - valid;
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data += offset;
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size = valid;
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}
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}
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}
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int Codec::validateQmfDomainBounds() {
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// Check OOB for qmfDomain
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void *qmfDomainBound = &(mAacDecoderHandle->qmfModeCurr);
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HANDLE_SBRDECODER hSbrDecoder = mAacDecoderHandle->hSbrDecoder;
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// Referring sbrDecoder_AssignQmfChannels2SbrChannels()
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{
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void *qmfDomainInChPtr = nullptr;
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void *qmfDomainOutChPtr = nullptr;
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int channel = 0;
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int element = 0;
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int absChOffset = 0;
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for (element = 0; element < hSbrDecoder->numSbrElements; ++element) {
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if (hSbrDecoder->pSbrElement[element] != NULL) {
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for (channel = 0; channel < hSbrDecoder->pSbrElement[element]->nChannels;
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++channel) {
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qmfDomainInChPtr = &hSbrDecoder->pQmfDomain->QmfDomainIn[absChOffset + channel];
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qmfDomainOutChPtr =
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&hSbrDecoder->pQmfDomain->QmfDomainOut[absChOffset + channel];
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if (qmfDomainBound <= qmfDomainInChPtr || qmfDomainBound <= qmfDomainOutChPtr) {
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kIsVulnerable = true;
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}
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}
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absChOffset += hSbrDecoder->pSbrElement[element]->nChannels;
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}
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}
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}
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return kIsVulnerable ? EXIT_VULNERABLE : EXIT_SUCCESS;
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}
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int main(int argc, char *argv[]) {
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if (argc != 2) {
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return EXIT_FAILURE;
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}
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std::ifstream file;
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file.open(argv[1], std::ios::in | std::ios::binary);
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if (!file.is_open()) {
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return EXIT_FAILURE;
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}
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file.ignore(std::numeric_limits<std::streamsize>::max());
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std::streamsize length = file.gcount();
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file.clear();
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file.seekg(0, std::ios_base::beg);
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UCHAR *data = new UCHAR[length];
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file.read(reinterpret_cast<char *>(data), length);
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file.close();
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Codec codec = Codec();
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if (codec.initDecoder()) {
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codec.decodeFrames(data, length);
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}
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return codec.validateQmfDomainBounds();
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}
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