dolphin/Source/Core/DiscIO/Src/VolumeCreator.cpp

234 lines
5.9 KiB
C++

// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <vector>
#include "Crypto/aes.h"
#include "VolumeCreator.h"
#include "Volume.h"
#include "VolumeDirectory.h"
#include "VolumeGC.h"
#include "VolumeWiiCrypted.h"
#include "VolumeWad.h"
#include "Hash.h"
#include "StringUtil.h"
namespace DiscIO
{
enum EDiscType
{
DISC_TYPE_UNK,
DISC_TYPE_WII,
DISC_TYPE_WII_CONTAINER,
DISC_TYPE_GC,
DISC_TYPE_WAD
};
#ifndef _WIN32
struct SPartition
{
u64 Offset;
u32 Type;
}; //gcc 4.3 cries if it's local
#endif
class CBlobBigEndianReader
{
public:
CBlobBigEndianReader(IBlobReader& _rReader) : m_rReader(_rReader) {}
u32 Read32(u64 _Offset)
{
u32 Temp;
m_rReader.Read(_Offset, 4, (u8*)&Temp);
return(Common::swap32(Temp));
}
private:
IBlobReader& m_rReader;
};
const unsigned char g_MasterKey[16] = {0xeb,0xe4,0x2a,0x22,0x5e,0x85,0x93,0xe4,0x48,0xd9,0xc5,0x45,0x73,0x81,0xaa,0xf7};
const unsigned char g_MasterKeyK[16] = {0x63,0xb8,0x2b,0xb4,0xf4,0x61,0x4e,0x2e,0x13,0xf2,0xfe,0xfb,0xba,0x4c,0x9b,0x7e};
static IVolume* CreateVolumeFromCryptedWiiImage(IBlobReader& _rReader, u32 _PartitionGroup, u32 _VolumeType, u32 _VolumeNum, bool Korean);
EDiscType GetDiscType(IBlobReader& _rReader);
IVolume* CreateVolumeFromFilename(const std::string& _rFilename, u32 _PartitionGroup, u32 _VolumeNum)
{
IBlobReader* pReader = CreateBlobReader(_rFilename.c_str());
if (pReader == NULL)
return NULL;
switch (GetDiscType(*pReader))
{
case DISC_TYPE_WII:
case DISC_TYPE_GC:
return new CVolumeGC(pReader);
case DISC_TYPE_WAD:
return new CVolumeWAD(pReader);
case DISC_TYPE_WII_CONTAINER:
{
u8 region;
pReader->Read(0x3,1,&region);
IVolume* pVolume = CreateVolumeFromCryptedWiiImage(*pReader, _PartitionGroup, 0, _VolumeNum, region == 'K');
if (pVolume == NULL)
{
delete pReader;
}
return pVolume;
}
break;
case DISC_TYPE_UNK:
default:
std::string Filename, ext;
SplitPath(_rFilename, NULL, &Filename, &ext);
Filename += ext;
NOTICE_LOG(DISCIO, "%s does not have the Magic word for a gcm, wiidisc or wad file\n"
"Set Log Verbosity to Warning and attempt to load the game again to view the values", Filename.c_str());
delete pReader;
return NULL;
}
// unreachable code
return NULL;
}
IVolume* CreateVolumeFromDirectory(const std::string& _rDirectory, bool _bIsWii, const std::string& _rApploader, const std::string& _rDOL)
{
if (CVolumeDirectory::IsValidDirectory(_rDirectory))
return new CVolumeDirectory(_rDirectory, _bIsWii, _rApploader, _rDOL);
return NULL;
}
bool IsVolumeWiiDisc(const IVolume *_rVolume)
{
u32 MagicWord = 0;
_rVolume->Read(0x18, 4, (u8*)&MagicWord);
return (Common::swap32(MagicWord) == 0x5D1C9EA3);
//Gamecube 0xc2339f3d
}
bool IsVolumeWadFile(const IVolume *_rVolume)
{
u32 MagicWord = 0;
_rVolume->Read(0x02, 4, (u8*)&MagicWord);
return (Common::swap32(MagicWord) == 0x00204973 || Common::swap32(MagicWord) == 0x00206962);
}
static IVolume* CreateVolumeFromCryptedWiiImage(IBlobReader& _rReader, u32 _PartitionGroup, u32 _VolumeType, u32 _VolumeNum, bool Korean)
{
CBlobBigEndianReader Reader(_rReader);
u32 numPartitions = Reader.Read32(0x40000 + (_PartitionGroup * 8));
u64 PartitionsOffset = (u64)Reader.Read32(0x40000 + (_PartitionGroup * 8) + 4) << 2;
// Check if we're looking for a valid partition
if ((int)_VolumeNum != -1 && _VolumeNum > numPartitions)
return NULL;
#ifdef _WIN32
struct SPartition
{
u64 Offset;
u32 Type;
};
#endif
struct SPartitionGroup
{
u32 numPartitions;
u64 PartitionsOffset;
std::vector<SPartition> PartitionsVec;
};
SPartitionGroup PartitionGroup[4];
// read all partitions
for (u32 x = 0; x < 4; x++)
{
for (u32 i = 0; i < numPartitions; i++)
{
SPartition Partition;
Partition.Offset = ((u64)Reader.Read32(PartitionsOffset + (i * 8) + 0)) << 2;
Partition.Type = Reader.Read32(PartitionsOffset + (i * 8) + 4);
PartitionGroup[x].PartitionsVec.push_back(Partition);
}
}
// return the partition type specified or number
// types: 0 = game, 1 = firmware update, 2 = channel installer
// some partitions on ssbb use the ascii title id of the demo VC game they hold...
for (size_t i = 0; i < PartitionGroup[_PartitionGroup].PartitionsVec.size(); i++)
{
const SPartition& rPartition = PartitionGroup[_PartitionGroup].PartitionsVec.at(i);
if (rPartition.Type == _VolumeType || i == _VolumeNum)
{
u8 SubKey[16];
_rReader.Read(rPartition.Offset + 0x1bf, 16, SubKey);
u8 IV[16];
memset(IV, 0, 16);
_rReader.Read(rPartition.Offset + 0x44c, 8, IV);
AES_KEY AES_KEY;
AES_set_decrypt_key((Korean ? g_MasterKeyK : g_MasterKey), 128, &AES_KEY);
u8 VolumeKey[16];
AES_cbc_encrypt(SubKey, VolumeKey, 16, &AES_KEY, IV, AES_DECRYPT);
// -1 means the caller just wanted the partition with matching type
if ((int)_VolumeNum == -1 || i == _VolumeNum)
return new CVolumeWiiCrypted(&_rReader, rPartition.Offset, VolumeKey);
}
}
return NULL;
}
EDiscType GetDiscType(IBlobReader& _rReader)
{
CBlobBigEndianReader Reader(_rReader);
u32 WiiMagic = Reader.Read32(0x18);
u32 WiiContainerMagic = Reader.Read32(0x60);
u32 WADMagic = Reader.Read32(0x02);
u32 GCMagic = Reader.Read32(0x1C);
// check for Wii
if (WiiMagic == 0x5D1C9EA3 && WiiContainerMagic != 0)
return DISC_TYPE_WII;
if (WiiMagic == 0x5D1C9EA3 && WiiContainerMagic == 0)
return DISC_TYPE_WII_CONTAINER;
// check for WAD
// 0x206962 for boot2 wads
if (WADMagic == 0x00204973 || WADMagic == 0x00206962)
return DISC_TYPE_WAD;
// check for GC
if (GCMagic == 0xC2339F3D)
return DISC_TYPE_GC;
WARN_LOG(DISCIO, "No known magic words found");
WARN_LOG(DISCIO, "Wii offset: 0x18 value: 0x%08x", WiiMagic);
WARN_LOG(DISCIO, "WiiC offset: 0x60 value: 0x%08x", WiiContainerMagic);
WARN_LOG(DISCIO, "WAD offset: 0x02 value: 0x%08x", WADMagic);
WARN_LOG(DISCIO, "GC offset: 0x1C value: 0x%08x", GCMagic);
return DISC_TYPE_UNK;
}
} // namespace