126 lines
5.4 KiB
C++
126 lines
5.4 KiB
C++
/****************************************************************************
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* Copyright (C) 2016-2021 Maschell
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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#include "VolumeHeader.h"
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#include <coreinit/debug.h>
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#include <memory>
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#include <utils/logger.h>
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uint32_t VolumeHeader::MAGIC = 0xCC93A4F5;
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std::vector<std::shared_ptr<H3HashArray>> VolumeHeader::getH3HashArray(uint8_t *h3Data, uint32_t pNumberOfH3HashArray, uint32_t pH3HashArrayListSize) {
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std::vector<std::shared_ptr<H3HashArray>> arrayList;
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if (pNumberOfH3HashArray == 0) {
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return arrayList;
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}
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for (uint32_t i = 1; i < pNumberOfH3HashArray; i++) {
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auto *offsetPtr = (uint32_t *) &h3Data[i * 4];
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uint32_t curOffset = offsetPtr[0];
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uint32_t curEnd = pH3HashArrayListSize;
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if (i < pNumberOfH3HashArray - 1) {
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// If it's not the last element, the end of our .h3 is the start of the next .h3
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curEnd = offsetPtr[1];
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}
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arrayList.push_back(std::make_shared<H3HashArray>(h3Data + curOffset, curEnd - curOffset));
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}
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return arrayList;
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}
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std::optional<std::shared_ptr<VolumeHeader>> VolumeHeader::make_shared(const std::shared_ptr<DiscReader> &discReader, uint64_t offset) {
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auto buffer = (uint8_t *) malloc(64);
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if (buffer == nullptr) {
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DEBUG_FUNCTION_LINE("Failed to alloc buffer");
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return {};
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}
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if (!discReader->readEncrypted(buffer, offset, 64)) {
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free(buffer);
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DEBUG_FUNCTION_LINE("Failed to read data");
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return {};
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}
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auto *bufferUint = (uint32_t *) buffer;
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if (bufferUint[0] != MAGIC) {
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DEBUG_FUNCTION_LINE("MAGIC mismatch");
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free(buffer);
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return {};
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}
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auto blockSize = VolumeBlockSize(bufferUint[1]);
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auto volumeSize = SizeInVolumeBlocks(blockSize, bufferUint[2]);
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auto h3HashArrayListSize = bufferUint[3];
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auto numberOfH3HashArray = bufferUint[4];
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auto FSTSize = bufferUint[5];
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auto FSTAddress = AddressInVolumeBlocks(blockSize, bufferUint[6]);
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auto FSTHashMode = buffer[36];
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auto encryptType = buffer[37];
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auto majorVersion = buffer[38];
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auto minorVersion = buffer[39];
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auto expiringMajorVersion = buffer[40];
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free(buffer);
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auto bufferH3 = (uint8_t *) malloc(ROUNDUP(h3HashArrayListSize, 16));
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if (bufferH3 == nullptr) {
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DEBUG_FUNCTION_LINE("Failed to alloc h3 buffer");
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return {};
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}
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if (!discReader->readEncrypted(bufferH3, offset + 64, ROUNDUP(h3HashArrayListSize, 16))) {
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DEBUG_FUNCTION_LINE("Failed to read h3 data");
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free(bufferH3);
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return {};
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}
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auto h3HashArrayList = getH3HashArray(bufferH3, numberOfH3HashArray, h3HashArrayListSize);
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free(bufferH3);
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return std::unique_ptr<VolumeHeader>(
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new VolumeHeader(blockSize, volumeSize, FSTSize, FSTAddress, FSTHashMode, encryptType, majorVersion, minorVersion, expiringMajorVersion, h3HashArrayList, h3HashArrayListSize,
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numberOfH3HashArray));
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}
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VolumeHeader::VolumeHeader(const VolumeBlockSize &pBlockSize,
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SizeInVolumeBlocks pVolumeSize,
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uint32_t pFSTSize,
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AddressInVolumeBlocks pFSTAddress,
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uint8_t pFSTHashMode,
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uint8_t pEncryptType,
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uint8_t pMajorVersion,
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uint8_t pMinorVersion,
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uint8_t pExpiringMajorVersion,
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std::vector<std::shared_ptr<H3HashArray>> pH3HashArrayList,
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uint32_t pH3HashArrayListSize,
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uint32_t pNumberOfH3HashArray) : blockSize(pBlockSize),
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volumeSize(std::move(pVolumeSize)),
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FSTSize(pFSTSize),
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FSTAddress(std::move(pFSTAddress)),
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FSTHashMode(pFSTHashMode),
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encryptType(pEncryptType),
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majorVersion(pMajorVersion),
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minorVersion(pMinorVersion),
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expiringMajorVersion(pExpiringMajorVersion),
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h3HashArrayList(std::move(pH3HashArrayList)),
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h3HashArrayListSize(pH3HashArrayListSize),
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numberOfH3HashArray(pNumberOfH3HashArray) {
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}
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