377 lines
10 KiB
C++
377 lines
10 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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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, version 2.0.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "stdafx.h"
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#include "Filesystem.h"
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#include "VolumeCreator.h"
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#include "FileUtil.h"
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#include "DiscScrubber.h"
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namespace DiscIO
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{
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namespace DiscScrubber
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{
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#define CLUSTER_SIZE 0x8000
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u8* m_FreeTable = NULL;
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u64 m_FileSize;
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u64 m_BlockCount;
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u32 m_BlockSize;
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int m_BlocksPerCluster;
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bool m_isScrubbing = false;
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std::string m_Filename;
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IVolume* m_Disc = NULL;
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struct SPartitionHeader
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{
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u8* Ticket[0x2a4];
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u32 TMDSize;
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u64 TMDOffset;
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u32 CertChainSize;
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u64 CertChainOffset;
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// H3Size is always 0x18000
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u64 H3Offset;
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u64 DataOffset;
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u64 DataSize;
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// TMD would be here
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u64 DOLOffset;
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u64 DOLSize;
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u64 FSTOffset;
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u64 FSTSize;
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u32 ApploaderSize;
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u32 ApploaderTrailerSize;
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};
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struct SPartition
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{
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u32 GroupNumber;
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u32 Number;
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u64 Offset;
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u32 Type;
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SPartitionHeader Header;
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};
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struct SPartitionGroup
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{
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u32 numPartitions;
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u64 PartitionsOffset;
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std::vector<SPartition> PartitionsVec;
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};
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SPartitionGroup PartitionGroup[4];
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void MarkAsUsed(u64 _Offset, u64 _Size);
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void MarkAsUsedE(u64 _PartitionDataOffset, u64 _Offset, u64 _Size);
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void ReadFromDisc(u64 _Offset, u64 _Length, u32& _Buffer);
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void ReadFromDisc(u64 _Offset, u64 _Length, u64& _Buffer);
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void ReadFromVolume(u64 _Offset, u64 _Length, u32& _Buffer);
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void ReadFromVolume(u64 _Offset, u64 _Length, u64& _Buffer);
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bool ParseDisc();
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bool ParsePartitionData(SPartition& _rPartition);
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u32 GetDOLSize(u64 _DOLOffset);
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bool SetupScrub(const char* filename, int block_size)
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{
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bool success = true;
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m_Filename = std::string(filename);
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m_BlockSize = block_size;
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if (CLUSTER_SIZE % m_BlockSize != 0)
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{
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ERROR_LOG(DISCIO, "block size %i is not a factor of 0x8000, scrubbing not possible", m_BlockSize);
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return false;
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}
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m_BlocksPerCluster = CLUSTER_SIZE / m_BlockSize;
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m_Disc = CreateVolumeFromFilename(filename);
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m_FileSize = m_Disc->GetSize();
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u32 numClusters = (u32)(m_FileSize / CLUSTER_SIZE);
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// Warn if not DVD5 or DVD9 size
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if (numClusters != 0x23048 && numClusters != 0x46090)
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WARN_LOG(DISCIO, "%s is not a standard sized wii disc! (%x blocks)", filename, numClusters);
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// Table of free blocks
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m_FreeTable = new u8[numClusters];
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std::fill(m_FreeTable, m_FreeTable + numClusters, 1);
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// Fill out table of free blocks
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success = ParseDisc();
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// Done with it; need it closed for the next part
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delete m_Disc;
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m_Disc = NULL;
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m_BlockCount = 0;
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// Let's not touch the file if we've failed up to here :p
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if (!success)
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Cleanup();
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m_isScrubbing = success;
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return success;
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}
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void GetNextBlock(FILE* in, u8* buffer)
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{
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u64 CurrentOffset = m_BlockCount * m_BlockSize;
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u64 i = CurrentOffset / CLUSTER_SIZE;
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if (m_isScrubbing && m_FreeTable[i])
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{
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DEBUG_LOG(DISCIO, "Freeing 0x%016llx", CurrentOffset);
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std::fill(buffer, buffer + m_BlockSize, 0xFF);
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fseeko(in, m_BlockSize, SEEK_CUR);
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}
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else
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{
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DEBUG_LOG(DISCIO, "Used 0x%016llx", CurrentOffset);
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fread(buffer, m_BlockSize, 1, in);
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}
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m_BlockCount++;
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}
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void Cleanup()
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{
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if (m_FreeTable) delete[] m_FreeTable;
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m_FreeTable = NULL;
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m_FileSize = 0;
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m_BlockCount = 0;
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m_BlockSize = 0;
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m_BlocksPerCluster = 0;
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m_isScrubbing = false;
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}
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void MarkAsUsed(u64 _Offset, u64 _Size)
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{
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u64 CurrentOffset = _Offset;
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u64 EndOffset = CurrentOffset + _Size;
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DEBUG_LOG(DISCIO, "Marking 0x%016llx - 0x%016llx as used", _Offset, EndOffset);
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while ((CurrentOffset < EndOffset) && (CurrentOffset < m_FileSize))
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{
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m_FreeTable[CurrentOffset / CLUSTER_SIZE] = 0;
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CurrentOffset += CLUSTER_SIZE;
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}
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}
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// Compensate for 0x400(SHA-1) per 0x8000(cluster)
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void MarkAsUsedE(u64 _PartitionDataOffset, u64 _Offset, u64 _Size)
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{
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u64 Offset;
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u64 Size;
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Offset = _Offset / 0x7c00;
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Offset = Offset * CLUSTER_SIZE;
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Offset += _PartitionDataOffset;
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Size = _Size / 0x7c00;
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Size = (Size + 1) * CLUSTER_SIZE;
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// Add on the offset in the first block for the case where data straddles blocks
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Size += _Offset % 0x7c00;
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MarkAsUsed(Offset, Size);
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}
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// Helper functions for RAW reading the BE discs
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void ReadFromDisc(u64 _Offset, u64 _Length, u32& _Buffer)
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{
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m_Disc->RAWRead(_Offset, _Length, (u8*)&_Buffer);
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_Buffer = Common::swap32(_Buffer);
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}
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void ReadFromDisc(u64 _Offset, u64 _Length, u64& _Buffer)
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{
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m_Disc->RAWRead(_Offset, _Length, (u8*)&_Buffer);
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_Buffer = Common::swap32((u32)_Buffer);
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_Buffer <<= 2;
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}
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// Helper functions for reading the BE volume
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void ReadFromVolume(u64 _Offset, u64 _Length, u32& _Buffer)
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{
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m_Disc->Read(_Offset, _Length, (u8*)&_Buffer);
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_Buffer = Common::swap32(_Buffer);
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}
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void ReadFromVolume(u64 _Offset, u64 _Length, u64& _Buffer)
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{
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m_Disc->Read(_Offset, _Length, (u8*)&_Buffer);
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_Buffer = Common::swap32((u32)_Buffer);
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_Buffer <<= 2;
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}
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bool ParseDisc()
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{
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// Mark the header as used - it's mostly 0s anyways
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MarkAsUsed(0, 0x50000);
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for (int x = 0; x < 4; x++)
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{
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ReadFromDisc(0x40000 + (x * 8) + 0, 4, PartitionGroup[x].numPartitions);
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ReadFromDisc(0x40000 + (x * 8) + 4, 4, PartitionGroup[x].PartitionsOffset);
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// Read all partitions
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for (u32 i = 0; i < PartitionGroup[x].numPartitions; i++)
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{
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SPartition Partition;
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Partition.GroupNumber = x;
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Partition.Number = i;
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ReadFromDisc(PartitionGroup[x].PartitionsOffset + (i * 8) + 0, 4, Partition.Offset);
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ReadFromDisc(PartitionGroup[x].PartitionsOffset + (i * 8) + 4, 4, Partition.Type);
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ReadFromDisc(Partition.Offset + 0x2a4, 4, Partition.Header.TMDSize);
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ReadFromDisc(Partition.Offset + 0x2a8, 4, Partition.Header.TMDOffset);
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ReadFromDisc(Partition.Offset + 0x2ac, 4, Partition.Header.CertChainSize);
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ReadFromDisc(Partition.Offset + 0x2b0, 4, Partition.Header.CertChainOffset);
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ReadFromDisc(Partition.Offset + 0x2b4, 4, Partition.Header.H3Offset);
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ReadFromDisc(Partition.Offset + 0x2b8, 4, Partition.Header.DataOffset);
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ReadFromDisc(Partition.Offset + 0x2bc, 4, Partition.Header.DataSize);
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PartitionGroup[x].PartitionsVec.push_back(Partition);
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}
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for (size_t i = 0; i < PartitionGroup[x].PartitionsVec.size(); i++)
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{
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SPartition& rPartition = PartitionGroup[x].PartitionsVec.at(i);
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const SPartitionHeader& rHeader = PartitionGroup[x].PartitionsVec.at(i).Header;
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MarkAsUsed(rPartition.Offset, 0x2c0);
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MarkAsUsed(rPartition.Offset + rHeader.TMDOffset, rHeader.TMDSize);
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MarkAsUsed(rPartition.Offset + rHeader.CertChainOffset, rHeader.CertChainSize);
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MarkAsUsed(rPartition.Offset + rHeader.H3Offset, 0x18000);
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// This would mark the whole (encrypted) data area
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// we need to parse FST and other crap to find what's free within it!
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//MarkAsUsed(rPartition.Offset + rHeader.DataOffset, rHeader.DataSize);
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// Parse Data! This is where the big gain is
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if (!ParsePartitionData(rPartition))
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return false;
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}
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}
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return true;
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}
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// Operations dealing with encrypted space are done here - the volume is swapped to allow this
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bool ParsePartitionData(SPartition& _rPartition)
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{
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bool ParsedOK = true;
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// Switch out the main volume temporarily
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IVolume *OldVolume = m_Disc;
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// Ready some stuff
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m_Disc = CreateVolumeFromFilename(m_Filename.c_str(), _rPartition.GroupNumber, _rPartition.Number);
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IFileSystem *FileSystem = CreateFileSystem(m_Disc);
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if (!FileSystem)
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{
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ERROR_LOG(DISCIO, "Failed to create filesystem for group %d partition %u", _rPartition.GroupNumber, _rPartition.Number)
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ParsedOK = false;
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}
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else
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{
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std::vector<const SFileInfo *> Files;
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size_t numFiles = FileSystem->GetFileList(Files);
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// Mark things as used which are not in the filesystem
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// Header, Header Information, Apploader
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ReadFromVolume(0x2440 + 0x14, 4, _rPartition.Header.ApploaderSize);
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ReadFromVolume(0x2440 + 0x18, 4, _rPartition.Header.ApploaderTrailerSize);
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MarkAsUsedE(_rPartition.Offset
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+ _rPartition.Header.DataOffset
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, 0
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, 0x2440
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+ _rPartition.Header.ApploaderSize
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+ _rPartition.Header.ApploaderTrailerSize);
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// DOL
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ReadFromVolume(0x420, 4, _rPartition.Header.DOLOffset);
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_rPartition.Header.DOLSize = GetDOLSize(_rPartition.Header.DOLOffset);
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MarkAsUsedE(_rPartition.Offset
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+ _rPartition.Header.DataOffset
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, _rPartition.Header.DOLOffset
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, _rPartition.Header.DOLSize);
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// FST
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ReadFromVolume(0x424, 4, _rPartition.Header.FSTOffset);
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ReadFromVolume(0x428, 4, _rPartition.Header.FSTSize);
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MarkAsUsedE(_rPartition.Offset
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+ _rPartition.Header.DataOffset
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, _rPartition.Header.FSTOffset
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, _rPartition.Header.FSTSize);
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// Go through the filesystem and mark entries as used
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for (size_t currentFile = 0; currentFile < numFiles; currentFile++)
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{
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DEBUG_LOG(DISCIO, "%s", currentFile ? (*Files.at(currentFile)).m_FullPath : "/");
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// Just 1byte for directory? - it will end up reserving a cluster this way
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if ((*Files.at(currentFile)).m_NameOffset & 0x1000000)
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MarkAsUsedE(_rPartition.Offset
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+ _rPartition.Header.DataOffset
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, (*Files.at(currentFile)).m_Offset, 1);
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else
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MarkAsUsedE(_rPartition.Offset
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+ _rPartition.Header.DataOffset
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, (*Files.at(currentFile)).m_Offset, (*Files.at(currentFile)).m_FileSize);
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}
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}
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delete FileSystem;
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// Swap back
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delete m_Disc;
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m_Disc = OldVolume;
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return ParsedOK;
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}
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u32 GetDOLSize(u64 _DOLOffset)
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{
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u32 offset = 0, size = 0, max = 0;
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// Iterate through the 7 code segments
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for (u8 i = 0; i < 7; i++)
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{
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ReadFromVolume(_DOLOffset + 0x00 + i * 4, 4, offset);
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ReadFromVolume(_DOLOffset + 0x90 + i * 4, 4, size);
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if (offset + size > max)
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max = offset + size;
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}
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// Iterate through the 11 data segments
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for (u8 i = 0; i < 11; i++)
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{
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ReadFromVolume(_DOLOffset + 0x1c + i * 4, 4, offset);
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ReadFromVolume(_DOLOffset + 0xac + i * 4, 4, size);
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if (offset + size > max)
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max = offset + size;
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}
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return max;
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}
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} // namespace DiscScrubber
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} // namespace DiscIO
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