/* * Copyright (C) 2017 Apple Inc. All rights reserved. * Copyright (C) 2018 Metrological Group B.V. * Copyright (C) 2018 Igalia S.L * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "ISOProtectionSystemSpecificHeaderBox.h" #include <JavaScriptCore/DataView.h> using JSC::DataView; namespace WebCore { bool ISOProtectionSystemSpecificHeaderBox::parse(DataView& view, unsigned& offset) { if (!ISOFullBox::parse(view, offset)) return false; // ISO/IEC 23001-7-2016 Section 8.1.1 auto buffer = view.possiblySharedBuffer(); if (!buffer) return false; auto systemID = buffer->slice(offset, offset + 16); offset += 16; m_systemID.resize(16); memcpy(m_systemID.data(), systemID->data(), 16); if (m_version) { uint32_t keyIDCount = 0; if (!checkedRead<uint32_t>(keyIDCount, view, offset, BigEndian)) return false; if (buffer->byteLength() - offset < keyIDCount * 16) return false; m_keyIDs.resize(keyIDCount); for (unsigned keyID = 0; keyID < keyIDCount; keyID++) { auto& currentKeyID = m_keyIDs[keyID]; currentKeyID.resize(16); auto parsedKeyID = buffer->slice(offset, offset + 16); offset += 16; memcpy(currentKeyID.data(), parsedKeyID->data(), 16); } } uint32_t dataSize = 0; if (!checkedRead<uint32_t>(dataSize, view, offset, BigEndian)) return false; if (buffer->byteLength() - offset < dataSize) return false; auto parsedData = buffer->slice(offset, offset + dataSize); offset += dataSize; m_data.resize(dataSize); memcpy(m_data.data(), parsedData->data(), dataSize); return true; } }