mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2024-09-20 19:31:53 +02:00
a87dffe52d
Previously, we had WBFS and CISO which both returned an upper bound of the size, and other formats which returned an accurate size. But now we also have NFS, which returns a lower bound of the size. To allow VolumeVerifier to make better informed decisions for NFS, let's use an enum instead of a bool for the type of data size a blob has.
656 lines
20 KiB
C++
656 lines
20 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "DiscIO/VolumeWii.h"
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#include <algorithm>
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#include <array>
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#include <cstddef>
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#include <cstring>
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#include <future>
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#include <map>
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#include <memory>
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#include <optional>
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#include <string>
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#include <thread>
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#include <utility>
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#include <vector>
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#include "Common/Align.h"
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#include "Common/Assert.h"
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#include "Common/CommonTypes.h"
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#include "Common/Crypto/AES.h"
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#include "Common/Crypto/SHA1.h"
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#include "Common/Logging/Log.h"
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#include "Common/Swap.h"
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#include "DiscIO/Blob.h"
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#include "DiscIO/DiscExtractor.h"
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#include "DiscIO/DiscUtils.h"
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#include "DiscIO/Enums.h"
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#include "DiscIO/FileSystemGCWii.h"
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#include "DiscIO/Filesystem.h"
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#include "DiscIO/Volume.h"
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#include "DiscIO/WiiSaveBanner.h"
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namespace DiscIO
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{
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VolumeWii::VolumeWii(std::unique_ptr<BlobReader> reader)
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: m_reader(std::move(reader)), m_game_partition(PARTITION_NONE),
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m_last_decrypted_block(UINT64_MAX)
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{
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ASSERT(m_reader);
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m_has_hashes = m_reader->ReadSwapped<u8>(0x60) == u8(0);
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m_has_encryption = m_reader->ReadSwapped<u8>(0x61) == u8(0);
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if (m_has_encryption && !m_has_hashes)
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ERROR_LOG_FMT(DISCIO, "Wii disc has encryption but no hashes! This probably won't work well");
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for (u32 partition_group = 0; partition_group < 4; ++partition_group)
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{
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const std::optional<u32> number_of_partitions =
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m_reader->ReadSwapped<u32>(0x40000 + (partition_group * 8));
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if (!number_of_partitions)
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continue;
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const std::optional<u64> partition_table_offset =
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ReadSwappedAndShifted(0x40000 + (partition_group * 8) + 4, PARTITION_NONE);
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if (!partition_table_offset)
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continue;
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for (u32 i = 0; i < number_of_partitions; i++)
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{
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const std::optional<u64> partition_offset =
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ReadSwappedAndShifted(*partition_table_offset + (i * 8), PARTITION_NONE);
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if (!partition_offset)
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continue;
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const Partition partition(*partition_offset);
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const std::optional<u32> partition_type =
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m_reader->ReadSwapped<u32>(*partition_table_offset + (i * 8) + 4);
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if (!partition_type)
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continue;
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// If this is the game partition, set m_game_partition
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if (m_game_partition == PARTITION_NONE && *partition_type == 0)
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m_game_partition = partition;
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auto get_ticket = [this, partition]() -> IOS::ES::TicketReader {
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std::vector<u8> ticket_buffer(sizeof(IOS::ES::Ticket));
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if (!m_reader->Read(partition.offset, ticket_buffer.size(), ticket_buffer.data()))
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return INVALID_TICKET;
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return IOS::ES::TicketReader{std::move(ticket_buffer)};
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};
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auto get_tmd = [this, partition]() -> IOS::ES::TMDReader {
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const std::optional<u32> tmd_size =
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m_reader->ReadSwapped<u32>(partition.offset + WII_PARTITION_TMD_SIZE_ADDRESS);
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const std::optional<u64> tmd_address = ReadSwappedAndShifted(
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partition.offset + WII_PARTITION_TMD_OFFSET_ADDRESS, PARTITION_NONE);
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if (!tmd_size || !tmd_address)
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return INVALID_TMD;
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if (!IOS::ES::IsValidTMDSize(*tmd_size))
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{
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// This check is normally done by ES in ES_DiVerify, but that would happen too late
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// (after allocating the buffer), so we do the check here.
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ERROR_LOG_FMT(DISCIO, "Invalid TMD size");
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return INVALID_TMD;
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}
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std::vector<u8> tmd_buffer(*tmd_size);
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if (!m_reader->Read(partition.offset + *tmd_address, *tmd_size, tmd_buffer.data()))
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return INVALID_TMD;
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return IOS::ES::TMDReader{std::move(tmd_buffer)};
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};
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auto get_cert_chain = [this, partition]() -> std::vector<u8> {
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const std::optional<u32> size =
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m_reader->ReadSwapped<u32>(partition.offset + WII_PARTITION_CERT_CHAIN_SIZE_ADDRESS);
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const std::optional<u64> address = ReadSwappedAndShifted(
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partition.offset + WII_PARTITION_CERT_CHAIN_OFFSET_ADDRESS, PARTITION_NONE);
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if (!size || !address)
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return {};
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std::vector<u8> cert_chain(*size);
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if (!m_reader->Read(partition.offset + *address, *size, cert_chain.data()))
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return {};
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return cert_chain;
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};
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auto get_h3_table = [this, partition]() -> std::vector<u8> {
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if (!m_has_hashes)
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return {};
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const std::optional<u64> h3_table_offset = ReadSwappedAndShifted(
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partition.offset + WII_PARTITION_H3_OFFSET_ADDRESS, PARTITION_NONE);
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if (!h3_table_offset)
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return {};
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std::vector<u8> h3_table(WII_PARTITION_H3_SIZE);
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if (!m_reader->Read(partition.offset + *h3_table_offset, WII_PARTITION_H3_SIZE,
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h3_table.data()))
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return {};
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return h3_table;
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};
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auto get_key = [this, partition]() -> std::unique_ptr<Common::AES::Context> {
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const IOS::ES::TicketReader& ticket = *m_partitions[partition].ticket;
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if (!ticket.IsValid())
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return nullptr;
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return Common::AES::CreateContextDecrypt(ticket.GetTitleKey().data());
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};
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auto get_file_system = [this, partition]() -> std::unique_ptr<FileSystem> {
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auto file_system = std::make_unique<FileSystemGCWii>(this, partition);
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return file_system->IsValid() ? std::move(file_system) : nullptr;
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};
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auto get_data_offset = [this, partition]() -> u64 {
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return ReadSwappedAndShifted(partition.offset + 0x2b8, PARTITION_NONE).value_or(0);
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};
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m_partitions.emplace(
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partition, PartitionDetails{Common::Lazy<std::unique_ptr<Common::AES::Context>>(get_key),
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Common::Lazy<IOS::ES::TicketReader>(get_ticket),
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Common::Lazy<IOS::ES::TMDReader>(get_tmd),
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Common::Lazy<std::vector<u8>>(get_cert_chain),
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Common::Lazy<std::vector<u8>>(get_h3_table),
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Common::Lazy<std::unique_ptr<FileSystem>>(get_file_system),
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Common::Lazy<u64>(get_data_offset), *partition_type});
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}
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}
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}
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VolumeWii::~VolumeWii()
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{
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}
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bool VolumeWii::Read(u64 offset, u64 length, u8* buffer, const Partition& partition) const
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{
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if (partition == PARTITION_NONE)
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return m_reader->Read(offset, length, buffer);
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auto it = m_partitions.find(partition);
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if (it == m_partitions.end())
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return false;
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const PartitionDetails& partition_details = it->second;
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const u64 partition_data_offset = partition.offset + *partition_details.data_offset;
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if (m_has_hashes && m_has_encryption &&
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m_reader->SupportsReadWiiDecrypted(offset, length, partition_data_offset))
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{
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return m_reader->ReadWiiDecrypted(offset, length, buffer, partition_data_offset);
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}
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if (!m_has_hashes)
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{
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return m_reader->Read(partition_data_offset + offset, length, buffer);
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}
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Common::AES::Context* aes_context = nullptr;
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std::unique_ptr<u8[]> read_buffer = nullptr;
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if (m_has_encryption)
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{
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aes_context = partition_details.key->get();
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if (!aes_context)
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return false;
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read_buffer = std::make_unique<u8[]>(BLOCK_TOTAL_SIZE);
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}
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while (length > 0)
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{
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// Calculate offsets
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u64 block_offset_on_disc = partition_data_offset + offset / BLOCK_DATA_SIZE * BLOCK_TOTAL_SIZE;
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u64 data_offset_in_block = offset % BLOCK_DATA_SIZE;
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if (m_last_decrypted_block != block_offset_on_disc)
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{
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if (m_has_encryption)
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{
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// Read the current block
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if (!m_reader->Read(block_offset_on_disc, BLOCK_TOTAL_SIZE, read_buffer.get()))
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return false;
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// Decrypt the block's data
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DecryptBlockData(read_buffer.get(), m_last_decrypted_block_data, aes_context);
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}
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else
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{
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// Read the current block
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if (!m_reader->Read(block_offset_on_disc + BLOCK_HEADER_SIZE, BLOCK_DATA_SIZE,
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m_last_decrypted_block_data))
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{
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return false;
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}
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}
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m_last_decrypted_block = block_offset_on_disc;
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}
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// Copy the decrypted data
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u64 copy_size = std::min(length, BLOCK_DATA_SIZE - data_offset_in_block);
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memcpy(buffer, &m_last_decrypted_block_data[data_offset_in_block],
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static_cast<size_t>(copy_size));
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// Update offsets
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length -= copy_size;
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buffer += copy_size;
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offset += copy_size;
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}
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return true;
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}
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bool VolumeWii::HasWiiHashes() const
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{
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return m_has_hashes;
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}
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bool VolumeWii::HasWiiEncryption() const
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{
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return m_has_encryption;
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}
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std::vector<Partition> VolumeWii::GetPartitions() const
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{
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std::vector<Partition> partitions;
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for (const auto& pair : m_partitions)
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partitions.push_back(pair.first);
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return partitions;
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}
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Partition VolumeWii::GetGamePartition() const
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{
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return m_game_partition;
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}
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std::optional<u32> VolumeWii::GetPartitionType(const Partition& partition) const
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{
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auto it = m_partitions.find(partition);
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return it != m_partitions.end() ? it->second.type : std::optional<u32>();
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}
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std::optional<u64> VolumeWii::GetTitleID(const Partition& partition) const
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{
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const IOS::ES::TicketReader& ticket = GetTicket(partition);
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if (!ticket.IsValid())
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return {};
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return ticket.GetTitleId();
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}
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const IOS::ES::TicketReader& VolumeWii::GetTicket(const Partition& partition) const
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{
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auto it = m_partitions.find(partition);
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return it != m_partitions.end() ? *it->second.ticket : INVALID_TICKET;
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}
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const IOS::ES::TMDReader& VolumeWii::GetTMD(const Partition& partition) const
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{
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auto it = m_partitions.find(partition);
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return it != m_partitions.end() ? *it->second.tmd : INVALID_TMD;
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}
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const std::vector<u8>& VolumeWii::GetCertificateChain(const Partition& partition) const
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{
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auto it = m_partitions.find(partition);
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return it != m_partitions.end() ? *it->second.cert_chain : INVALID_CERT_CHAIN;
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}
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const FileSystem* VolumeWii::GetFileSystem(const Partition& partition) const
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{
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auto it = m_partitions.find(partition);
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return it != m_partitions.end() ? it->second.file_system->get() : nullptr;
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}
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u64 VolumeWii::OffsetInHashedPartitionToRawOffset(u64 offset, const Partition& partition,
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u64 partition_data_offset)
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{
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if (partition == PARTITION_NONE)
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return offset;
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return partition.offset + partition_data_offset + (offset / BLOCK_DATA_SIZE * BLOCK_TOTAL_SIZE) +
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(offset % BLOCK_DATA_SIZE);
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}
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u64 VolumeWii::PartitionOffsetToRawOffset(u64 offset, const Partition& partition) const
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{
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auto it = m_partitions.find(partition);
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if (it == m_partitions.end())
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return offset;
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const u64 data_offset = *it->second.data_offset;
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if (!m_has_hashes)
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return partition.offset + data_offset + offset;
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return OffsetInHashedPartitionToRawOffset(offset, partition, data_offset);
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}
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std::string VolumeWii::GetGameTDBID(const Partition& partition) const
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{
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return GetGameID(partition);
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}
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Region VolumeWii::GetRegion() const
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{
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return RegionCodeToRegion(m_reader->ReadSwapped<u32>(0x4E000));
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}
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std::map<Language, std::string> VolumeWii::GetLongNames() const
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{
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std::vector<char16_t> names(NAMES_TOTAL_CHARS);
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names.resize(ReadFile(*this, GetGamePartition(), "opening.bnr",
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reinterpret_cast<u8*>(names.data()), NAMES_TOTAL_BYTES, 0x5C));
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return ReadWiiNames(names);
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}
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std::vector<u32> VolumeWii::GetBanner(u32* width, u32* height) const
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{
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*width = 0;
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*height = 0;
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const std::optional<u64> title_id = GetTitleID(GetGamePartition());
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if (!title_id)
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return std::vector<u32>();
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return WiiSaveBanner(*title_id).GetBanner(width, height);
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}
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Platform VolumeWii::GetVolumeType() const
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{
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return Platform::WiiDisc;
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}
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bool VolumeWii::IsDatelDisc() const
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{
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return m_game_partition == PARTITION_NONE;
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}
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BlobType VolumeWii::GetBlobType() const
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{
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return m_reader->GetBlobType();
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}
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u64 VolumeWii::GetDataSize() const
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{
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return m_reader->GetDataSize();
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}
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DataSizeType VolumeWii::GetDataSizeType() const
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{
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return m_reader->GetDataSizeType();
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}
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u64 VolumeWii::GetRawSize() const
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{
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return m_reader->GetRawSize();
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}
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const BlobReader& VolumeWii::GetBlobReader() const
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{
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return *m_reader;
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}
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std::array<u8, 20> VolumeWii::GetSyncHash() const
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{
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auto context = Common::SHA1::CreateContext();
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// Disc header
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ReadAndAddToSyncHash(context.get(), 0, 0x80, PARTITION_NONE);
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// Region code
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ReadAndAddToSyncHash(context.get(), 0x4E000, 4, PARTITION_NONE);
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// The data offset of the game partition - an important factor for disc drive timings
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const u64 data_offset = PartitionOffsetToRawOffset(0, GetGamePartition());
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context->Update(reinterpret_cast<const u8*>(&data_offset), sizeof(data_offset));
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// TMD
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AddTMDToSyncHash(context.get(), GetGamePartition());
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// Game partition contents
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AddGamePartitionToSyncHash(context.get());
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return context->Finish();
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}
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bool VolumeWii::CheckH3TableIntegrity(const Partition& partition) const
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{
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auto it = m_partitions.find(partition);
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if (it == m_partitions.end())
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return false;
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const PartitionDetails& partition_details = it->second;
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const std::vector<u8>& h3_table = *partition_details.h3_table;
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if (h3_table.size() != WII_PARTITION_H3_SIZE)
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return false;
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const IOS::ES::TMDReader& tmd = *partition_details.tmd;
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if (!tmd.IsValid())
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return false;
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const std::vector<IOS::ES::Content> contents = tmd.GetContents();
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if (contents.size() != 1)
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return false;
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return Common::SHA1::CalculateDigest(h3_table) == contents[0].sha1;
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}
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bool VolumeWii::CheckBlockIntegrity(u64 block_index, const u8* encrypted_data,
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const Partition& partition) const
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{
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auto it = m_partitions.find(partition);
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if (it == m_partitions.end())
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return false;
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const PartitionDetails& partition_details = it->second;
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if (block_index / BLOCKS_PER_GROUP * Common::SHA1::DIGEST_LEN >=
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partition_details.h3_table->size())
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{
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return false;
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}
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HashBlock hashes;
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u8 cluster_data_buffer[BLOCK_DATA_SIZE];
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const u8* cluster_data;
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if (m_has_encryption)
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{
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Common::AES::Context* aes_context = partition_details.key->get();
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if (!aes_context)
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return false;
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DecryptBlockHashes(encrypted_data, &hashes, aes_context);
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DecryptBlockData(encrypted_data, cluster_data_buffer, aes_context);
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cluster_data = cluster_data_buffer;
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}
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else
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{
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std::memcpy(&hashes, encrypted_data, BLOCK_HEADER_SIZE);
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cluster_data = encrypted_data + BLOCK_HEADER_SIZE;
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}
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for (u32 hash_index = 0; hash_index < 31; ++hash_index)
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{
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if (Common::SHA1::CalculateDigest(&cluster_data[hash_index * 0x400], 0x400) !=
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hashes.h0[hash_index])
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{
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return false;
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}
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}
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if (Common::SHA1::CalculateDigest(hashes.h0) != hashes.h1[block_index % 8])
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return false;
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if (Common::SHA1::CalculateDigest(hashes.h1) != hashes.h2[block_index / 8 % 8])
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return false;
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Common::SHA1::Digest h3_digest;
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auto h3_digest_ptr =
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partition_details.h3_table->data() + block_index / 64 * Common::SHA1::DIGEST_LEN;
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memcpy(h3_digest.data(), h3_digest_ptr, sizeof(h3_digest));
|
|
if (Common::SHA1::CalculateDigest(hashes.h2) != h3_digest)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool VolumeWii::CheckBlockIntegrity(u64 block_index, const Partition& partition) const
|
|
{
|
|
auto it = m_partitions.find(partition);
|
|
if (it == m_partitions.end())
|
|
return false;
|
|
const PartitionDetails& partition_details = it->second;
|
|
const u64 cluster_offset =
|
|
partition.offset + *partition_details.data_offset + block_index * BLOCK_TOTAL_SIZE;
|
|
|
|
std::vector<u8> cluster(BLOCK_TOTAL_SIZE);
|
|
if (!m_reader->Read(cluster_offset, cluster.size(), cluster.data()))
|
|
return false;
|
|
return CheckBlockIntegrity(block_index, cluster.data(), partition);
|
|
}
|
|
|
|
bool VolumeWii::HashGroup(const std::array<u8, BLOCK_DATA_SIZE> in[BLOCKS_PER_GROUP],
|
|
HashBlock out[BLOCKS_PER_GROUP],
|
|
const std::function<bool(size_t block)>& read_function)
|
|
{
|
|
std::array<std::future<void>, BLOCKS_PER_GROUP> hash_futures;
|
|
bool success = true;
|
|
|
|
for (size_t i = 0; i < BLOCKS_PER_GROUP; ++i)
|
|
{
|
|
if (read_function && success)
|
|
success = read_function(i);
|
|
|
|
hash_futures[i] = std::async(std::launch::async, [&in, &out, &hash_futures, success, i]() {
|
|
const size_t h1_base = Common::AlignDown(i, 8);
|
|
|
|
if (success)
|
|
{
|
|
// H0 hashes
|
|
for (size_t j = 0; j < 31; ++j)
|
|
out[i].h0[j] = Common::SHA1::CalculateDigest(in[i].data() + j * 0x400, 0x400);
|
|
|
|
// H0 padding
|
|
out[i].padding_0 = {};
|
|
|
|
// H1 hash
|
|
out[h1_base].h1[i - h1_base] = Common::SHA1::CalculateDigest(out[i].h0);
|
|
}
|
|
|
|
if (i % 8 == 7)
|
|
{
|
|
for (size_t j = 0; j < 7; ++j)
|
|
hash_futures[h1_base + j].get();
|
|
|
|
if (success)
|
|
{
|
|
// H1 padding
|
|
out[h1_base].padding_1 = {};
|
|
|
|
// H1 copies
|
|
for (size_t j = 1; j < 8; ++j)
|
|
out[h1_base + j].h1 = out[h1_base].h1;
|
|
|
|
// H2 hash
|
|
out[0].h2[h1_base / 8] = Common::SHA1::CalculateDigest(out[i].h1);
|
|
}
|
|
|
|
if (i == BLOCKS_PER_GROUP - 1)
|
|
{
|
|
for (size_t j = 0; j < 7; ++j)
|
|
hash_futures[j * 8 + 7].get();
|
|
|
|
if (success)
|
|
{
|
|
// H2 padding
|
|
out[0].padding_2 = {};
|
|
|
|
// H2 copies
|
|
for (size_t j = 1; j < BLOCKS_PER_GROUP; ++j)
|
|
out[j].h2 = out[0].h2;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
// Wait for all the async tasks to finish
|
|
hash_futures.back().get();
|
|
|
|
return success;
|
|
}
|
|
|
|
bool VolumeWii::EncryptGroup(
|
|
u64 offset, u64 partition_data_offset, u64 partition_data_decrypted_size,
|
|
const std::array<u8, AES_KEY_SIZE>& key, BlobReader* blob,
|
|
std::array<u8, GROUP_TOTAL_SIZE>* out,
|
|
const std::function<void(HashBlock hash_blocks[BLOCKS_PER_GROUP])>& hash_exception_callback)
|
|
{
|
|
std::vector<std::array<u8, BLOCK_DATA_SIZE>> unencrypted_data(BLOCKS_PER_GROUP);
|
|
std::vector<HashBlock> unencrypted_hashes(BLOCKS_PER_GROUP);
|
|
|
|
const bool success =
|
|
HashGroup(unencrypted_data.data(), unencrypted_hashes.data(), [&](size_t block) {
|
|
if (offset + (block + 1) * BLOCK_DATA_SIZE <= partition_data_decrypted_size)
|
|
{
|
|
if (!blob->ReadWiiDecrypted(offset + block * BLOCK_DATA_SIZE, BLOCK_DATA_SIZE,
|
|
unencrypted_data[block].data(), partition_data_offset))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
unencrypted_data[block].fill(0);
|
|
}
|
|
return true;
|
|
});
|
|
|
|
if (!success)
|
|
return false;
|
|
|
|
if (hash_exception_callback)
|
|
hash_exception_callback(unencrypted_hashes.data());
|
|
|
|
const unsigned int threads =
|
|
std::min(BLOCKS_PER_GROUP, std::max<unsigned int>(1, std::thread::hardware_concurrency()));
|
|
|
|
std::vector<std::future<void>> encryption_futures(threads);
|
|
|
|
auto aes_context = Common::AES::CreateContextEncrypt(key.data());
|
|
|
|
for (size_t i = 0; i < threads; ++i)
|
|
{
|
|
encryption_futures[i] = std::async(
|
|
std::launch::async,
|
|
[&unencrypted_data, &unencrypted_hashes, &aes_context, &out](size_t start, size_t end) {
|
|
for (size_t j = start; j < end; ++j)
|
|
{
|
|
u8* out_ptr = out->data() + j * BLOCK_TOTAL_SIZE;
|
|
|
|
aes_context->CryptIvZero(reinterpret_cast<u8*>(&unencrypted_hashes[j]), out_ptr,
|
|
BLOCK_HEADER_SIZE);
|
|
|
|
aes_context->Crypt(out_ptr + 0x3D0, unencrypted_data[j].data(),
|
|
out_ptr + BLOCK_HEADER_SIZE, BLOCK_DATA_SIZE);
|
|
}
|
|
},
|
|
i * BLOCKS_PER_GROUP / threads, (i + 1) * BLOCKS_PER_GROUP / threads);
|
|
}
|
|
|
|
for (std::future<void>& future : encryption_futures)
|
|
future.get();
|
|
|
|
return true;
|
|
}
|
|
|
|
void VolumeWii::DecryptBlockHashes(const u8* in, HashBlock* out, Common::AES::Context* aes_context)
|
|
{
|
|
aes_context->CryptIvZero(in, reinterpret_cast<u8*>(out), sizeof(HashBlock));
|
|
}
|
|
|
|
void VolumeWii::DecryptBlockData(const u8* in, u8* out, Common::AES::Context* aes_context)
|
|
{
|
|
aes_context->Crypt(&in[0x3d0], &in[sizeof(HashBlock)], out, BLOCK_DATA_SIZE);
|
|
}
|
|
|
|
} // namespace DiscIO
|