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Merge pull request #6947 from JosJuice/unencrypted-wii-disc 

Make the support for unencrypted Wii disc images less broken
This commit is contained in:
Léo Lam 2018-05-26 11:56:51 +02:00 committed by GitHub
parent 3f81c30e8a 58743416bb
commit 92ec97f899
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 90 additions and 32 deletions
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6
Source/Core/Core/HW/DVD/DVDInterface.cpp
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@ -1142,7 +1142,7 @@ void ScheduleReads(u64 offset, u32 length, const DiscIO::Partition& partition, u
// The variable dvd_offset tracks the actual offset on the DVD
// that the disc drive starts reading at, which differs in two ways:
// It's rounded to a whole ECC block and never uses Wii partition addressing.
u64 dvd_offset = DiscIO::VolumeWii::PartitionOffsetToRawOffset(offset, partition);
u64 dvd_offset = DVDThread::PartitionOffsetToRawOffset(offset, partition);
dvd_offset = Common::AlignDown(dvd_offset, DVD_ECC_BLOCK_SIZE);
if (SConfig::GetInstance().bFastDiscSpeed)
@ -1209,7 +1209,9 @@ void ScheduleReads(u64 offset, u32 length, const DiscIO::Partition& partition, u
u32 unbuffered_blocks = 0;
const u32 bytes_per_chunk =
partition == DiscIO::PARTITION_NONE ? DVD_ECC_BLOCK_SIZE : DiscIO::VolumeWii::BLOCK_DATA_SIZE;
partition != DiscIO::PARTITION_NONE && DVDThread::IsEncryptedAndHashed() ?
DiscIO::VolumeWii::BLOCK_DATA_SIZE :
DVD_ECC_BLOCK_SIZE;
do
{

12
Source/Core/Core/HW/DVD/DVDThread.cpp
View File

@ -186,12 +186,24 @@ bool HasDisc()
return s_disc != nullptr;
}
bool IsEncryptedAndHashed()
{
// IsEncryptedAndHashed is thread-safe, so calling WaitUntilIdle isn't necessary.
return s_disc->IsEncryptedAndHashed();
}
DiscIO::Platform GetDiscType()
{
// GetVolumeType is thread-safe, so calling WaitUntilIdle isn't necessary.
return s_disc->GetVolumeType();
}
u64 PartitionOffsetToRawOffset(u64 offset, const DiscIO::Partition& partition)
{
// PartitionOffsetToRawOffset is thread-safe, so calling WaitUntilIdle isn't necessary.
return s_disc->PartitionOffsetToRawOffset(offset, partition);
}
IOS::ES::TMDReader GetTMD(const DiscIO::Partition& partition)
{
WaitUntilIdle();

2
Source/Core/Core/HW/DVD/DVDThread.h
View File

@ -42,7 +42,9 @@ void DoState(PointerWrap& p);
void SetDisc(std::unique_ptr<DiscIO::Volume> disc);
bool HasDisc();
bool IsEncryptedAndHashed();
DiscIO::Platform GetDiscType();
u64 PartitionOffsetToRawOffset(u64 offset, const DiscIO::Partition& partition);
IOS::ES::TMDReader GetTMD(const DiscIO::Partition& partition);
IOS::ES::TicketReader GetTicket(const DiscIO::Partition& partition);
// This function returns true and calls SConfig::SetRunningGameMetadata(Volume&, Partition&)

9
Source/Core/DiscIO/DirectoryBlob.cpp
View File

@ -54,6 +54,8 @@ enum class PartitionType : u32
// 0xFF is an arbitrarily picked value. Note that we can't use 0x00, because that means NTSC-J
constexpr u32 INVALID_REGION = 0xFF;
constexpr u32 PARTITION_DATA_OFFSET = 0x20000;
constexpr u8 ENTRY_SIZE = 0x0c;
constexpr u8 FILE_ENTRY = 0;
constexpr u8 DIRECTORY_ENTRY = 1;
@ -508,8 +510,8 @@ void DirectoryBlobReader::SetPartitions(std::vector<PartitionWithType>&& partiti
const u64 partition_data_size = partitions[i].partition.GetDataSize();
m_partitions.emplace(partition_address, std::move(partitions[i].partition));
const u64 unaligned_next_partition_address =
VolumeWii::PartitionOffsetToRawOffset(partition_data_size, Partition(partition_address));
const u64 unaligned_next_partition_address = VolumeWii::EncryptedPartitionOffsetToRawOffset(
partition_data_size, Partition(partition_address), PARTITION_DATA_OFFSET);
partition_address = Common::AlignUp(unaligned_next_partition_address, 0x10000ull);
}
m_data_size = partition_address;
@ -546,7 +548,6 @@ void DirectoryBlobReader::SetPartitionHeader(const DirectoryBlobPartition& parti
partition_root + "h3.bin");
constexpr u32 PARTITION_HEADER_SIZE = 0x1c;
constexpr u32 DATA_OFFSET = 0x20000;
const u64 data_size = Common::AlignUp(partition.GetDataSize(), 0x7c00) / 0x7c00 * 0x8000;
m_partition_headers.emplace_back(PARTITION_HEADER_SIZE);
std::vector<u8>& partition_header = m_partition_headers.back();
@ -555,7 +556,7 @@ void DirectoryBlobReader::SetPartitionHeader(const DirectoryBlobPartition& parti
Write32(static_cast<u32>(cert_size), 0x8, &partition_header);
Write32(static_cast<u32>(cert_offset >> 2), 0x0C, &partition_header);
Write32(H3_OFFSET >> 2, 0x10, &partition_header);
Write32(DATA_OFFSET >> 2, 0x14, &partition_header);
Write32(PARTITION_DATA_OFFSET >> 2, 0x14, &partition_header);
Write32(static_cast<u32>(data_size >> 2), 0x18, &partition_header);
m_nonpartition_contents.Add(partition_address + TICKET_SIZE, partition_header);

1
Source/Core/DiscIO/DiscExtractor.cpp
View File

@ -361,6 +361,7 @@ bool ExportSystemData(const Volume& volume, const Partition& partition,
success &= ExportTicket(volume, partition, export_folder + "/ticket.bin");
success &= ExportTMD(volume, partition, export_folder + "/tmd.bin");
success &= ExportCertificateChain(volume, partition, export_folder + "/cert.bin");
if (volume.IsEncryptedAndHashed())
success &= ExportH3Hashes(volume, partition, export_folder + "/h3.bin");
}

5
Source/Core/DiscIO/Volume.h
View File

@ -58,6 +58,7 @@ public:
return temp ? static_cast<u64>(*temp) << GetOffsetShift() : std::optional<u64>();
}
virtual bool IsEncryptedAndHashed() const { return false; }
virtual std::vector<Partition> GetPartitions() const { return {}; }
virtual Partition GetGamePartition() const { return PARTITION_NONE; }
virtual std::optional<u32> GetPartitionType(const Partition& partition) const { return {}; }
@ -70,6 +71,10 @@ public:
virtual const IOS::ES::TMDReader& GetTMD(const Partition& partition) const { return INVALID_TMD; }
// Returns a non-owning pointer. Returns nullptr if the file system couldn't be read.
virtual const FileSystem* GetFileSystem(const Partition& partition) const = 0;
virtual u64 PartitionOffsetToRawOffset(u64 offset, const Partition& partition) const
{
return offset;
}
std::string GetGameID() const { return GetGameID(GetGamePartition()); }
virtual std::string GetGameID(const Partition& partition) const = 0;
std::string GetMakerID() const { return GetMakerID(GetGamePartition()); }

66
Source/Core/DiscIO/VolumeWii.cpp
View File

@ -33,19 +33,13 @@
namespace DiscIO
{
constexpr u64 PARTITION_DATA_OFFSET = 0x20000;
VolumeWii::VolumeWii(std::unique_ptr<BlobReader> reader)
: m_pReader(std::move(reader)), m_game_partition(PARTITION_NONE),
m_last_decrypted_block(UINT64_MAX)
{
ASSERT(m_pReader);
if (m_pReader->ReadSwapped<u32>(0x60) != u32(0))
{
// No partitions - just read unencrypted data like with a GC disc
return;
}
m_encrypted = m_pReader->ReadSwapped<u32>(0x60) == u32(0);
for (u32 partition_group = 0; partition_group < 4; ++partition_group)
{
@ -118,12 +112,16 @@ VolumeWii::VolumeWii(std::unique_ptr<BlobReader> reader)
return file_system->IsValid() ? std::move(file_system) : nullptr;
};
auto get_data_offset = [this, partition]() -> u64 {
return ReadSwappedAndShifted(partition.offset + 0x2b8, PARTITION_NONE).value_or(0);
};
m_partitions.emplace(
partition, PartitionDetails{Common::Lazy<std::unique_ptr<mbedtls_aes_context>>(get_key),
Common::Lazy<IOS::ES::TicketReader>(get_ticket),
Common::Lazy<IOS::ES::TMDReader>(get_tmd),
Common::Lazy<std::unique_ptr<FileSystem>>(get_file_system),
*partition_type});
Common::Lazy<u64>(get_data_offset), *partition_type});
}
}
}
@ -137,14 +135,21 @@ bool VolumeWii::Read(u64 _ReadOffset, u64 _Length, u8* _pBuffer, const Partition
if (partition == PARTITION_NONE)
return m_pReader->Read(_ReadOffset, _Length, _pBuffer);
if (m_pReader->SupportsReadWiiDecrypted())
return m_pReader->ReadWiiDecrypted(_ReadOffset, _Length, _pBuffer, partition.offset);
// Get the decryption key for the partition
auto it = m_partitions.find(partition);
if (it == m_partitions.end())
return false;
mbedtls_aes_context* aes_context = it->second.key->get();
const PartitionDetails& partition_details = it->second;
if (!m_encrypted)
{
return m_pReader->Read(partition.offset + *partition_details.data_offset + _ReadOffset, _Length,
_pBuffer);
}
if (m_pReader->SupportsReadWiiDecrypted())
return m_pReader->ReadWiiDecrypted(_ReadOffset, _Length, _pBuffer, partition.offset);
mbedtls_aes_context* aes_context = partition_details.key->get();
if (!aes_context)
return false;
@ -152,8 +157,8 @@ bool VolumeWii::Read(u64 _ReadOffset, u64 _Length, u8* _pBuffer, const Partition
while (_Length > 0)
{
// Calculate offsets
u64 block_offset_on_disc =
partition.offset + PARTITION_DATA_OFFSET + _ReadOffset / BLOCK_DATA_SIZE * BLOCK_TOTAL_SIZE;
u64 block_offset_on_disc = partition.offset + *partition_details.data_offset +
_ReadOffset / BLOCK_DATA_SIZE * BLOCK_TOTAL_SIZE;
u64 data_offset_in_block = _ReadOffset % BLOCK_DATA_SIZE;
if (m_last_decrypted_block != block_offset_on_disc)
@ -190,6 +195,11 @@ bool VolumeWii::Read(u64 _ReadOffset, u64 _Length, u8* _pBuffer, const Partition
return true;
}
bool VolumeWii::IsEncryptedAndHashed() const
{
return m_encrypted;
}
std::vector<Partition> VolumeWii::GetPartitions() const
{
std::vector<Partition> partitions;
@ -235,15 +245,29 @@ const FileSystem* VolumeWii::GetFileSystem(const Partition& partition) const
return it != m_partitions.end() ? it->second.file_system->get() : nullptr;
}
u64 VolumeWii::PartitionOffsetToRawOffset(u64 offset, const Partition& partition)
u64 VolumeWii::EncryptedPartitionOffsetToRawOffset(u64 offset, const Partition& partition,
u64 partition_data_offset)
{
if (partition == PARTITION_NONE)
return offset;
return partition.offset + PARTITION_DATA_OFFSET + (offset / BLOCK_DATA_SIZE * BLOCK_TOTAL_SIZE) +
return partition.offset + partition_data_offset + (offset / BLOCK_DATA_SIZE * BLOCK_TOTAL_SIZE) +
(offset % BLOCK_DATA_SIZE);
}
u64 VolumeWii::PartitionOffsetToRawOffset(u64 offset, const Partition& partition) const
{
auto it = m_partitions.find(partition);
if (it == m_partitions.end())
return offset;
const u64 data_offset = *it->second.data_offset;
if (!m_encrypted)
return partition.offset + data_offset + offset;
return EncryptedPartitionOffsetToRawOffset(offset, partition, data_offset);
}
std::string VolumeWii::GetGameID(const Partition& partition) const
{
char ID[6];
@ -357,11 +381,15 @@ u64 VolumeWii::GetRawSize() const
bool VolumeWii::CheckIntegrity(const Partition& partition) const
{
if (!m_encrypted)
return false;
// Get the decryption key for the partition
auto it = m_partitions.find(partition);
if (it == m_partitions.end())
return false;
mbedtls_aes_context* aes_context = it->second.key->get();
const PartitionDetails& partition_details = it->second;
mbedtls_aes_context* aes_context = partition_details.key->get();
if (!aes_context)
return false;
@ -373,7 +401,7 @@ bool VolumeWii::CheckIntegrity(const Partition& partition) const
u32 nClusters = (u32)(partDataSize / 0x8000);
for (u32 clusterID = 0; clusterID < nClusters; ++clusterID)
{
u64 clusterOff = partition.offset + PARTITION_DATA_OFFSET + (u64)clusterID * 0x8000;
u64 clusterOff = partition.offset + *partition_details.data_offset + (u64)clusterID * 0x8000;
// Read and decrypt the cluster metadata
u8 clusterMDCrypted[0x400];

8
Source/Core/DiscIO/VolumeWii.h
View File

@ -33,6 +33,7 @@ public:
VolumeWii(std::unique_ptr<BlobReader> reader);
~VolumeWii();
bool Read(u64 _Offset, u64 _Length, u8* _pBuffer, const Partition& partition) const override;
bool IsEncryptedAndHashed() const override;
std::vector<Partition> GetPartitions() const override;
Partition GetGamePartition() const override;
std::optional<u32> GetPartitionType(const Partition& partition) const override;
@ -40,6 +41,9 @@ public:
const IOS::ES::TicketReader& GetTicket(const Partition& partition) const override;
const IOS::ES::TMDReader& GetTMD(const Partition& partition) const override;
const FileSystem* GetFileSystem(const Partition& partition) const override;
static u64 EncryptedPartitionOffsetToRawOffset(u64 offset, const Partition& partition,
u64 partition_data_offset);
u64 PartitionOffsetToRawOffset(u64 offset, const Partition& partition) const override;
std::string GetGameID(const Partition& partition) const override;
std::string GetMakerID(const Partition& partition) const override;
std::optional<u16> GetRevision(const Partition& partition) const override;
@ -59,8 +63,6 @@ public:
u64 GetSize() const override;
u64 GetRawSize() const override;
static u64 PartitionOffsetToRawOffset(u64 offset, const Partition& partition);
static constexpr unsigned int BLOCK_HEADER_SIZE = 0x0400;
static constexpr unsigned int BLOCK_DATA_SIZE = 0x7C00;
static constexpr unsigned int BLOCK_TOTAL_SIZE = BLOCK_HEADER_SIZE + BLOCK_DATA_SIZE;
@ -75,12 +77,14 @@ private:
Common::Lazy<IOS::ES::TicketReader> ticket;
Common::Lazy<IOS::ES::TMDReader> tmd;
Common::Lazy<std::unique_ptr<FileSystem>> file_system;
Common::Lazy<u64> data_offset;
u32 type;
};
std::unique_ptr<BlobReader> m_pReader;
std::map<Partition, PartitionDetails> m_partitions;
Partition m_game_partition;
bool m_encrypted;
mutable u64 m_last_decrypted_block;
mutable u8 m_last_decrypted_block_data[BLOCK_DATA_SIZE];

3
Source/Core/DolphinQt2/Config/FilesystemWidget.cpp
View File

@ -219,9 +219,12 @@ void FilesystemWidget::ShowContextMenu(const QPoint&)
if (!folder.isEmpty())
ExtractPartition(partition, folder);
});
if (m_volume->IsEncryptedAndHashed())
{
menu->addSeparator();
AddAction(menu, tr("Check Partition Integrity"), this,
[this, partition] { CheckIntegrity(partition); });
}
break;
case EntryType::File:
AddAction(menu, tr("Extract File..."), this, [this, partition, path] {

2
Source/Core/DolphinWX/ISOProperties/FilesystemPanel.cpp
View File

@ -204,7 +204,7 @@ void FilesystemPanel::OnRightClickTree(wxTreeEvent& event)
else
menu.Append(ID_EXTRACT_ALL, _("Extract Entire Partition..."));
if (first_visible_item != selection)
if (first_visible_item != selection && m_opened_iso->IsEncryptedAndHashed())
{
menu.AppendSeparator();
menu.Append(ID_CHECK_INTEGRITY, _("Check Partition Integrity"));