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Remove files that are not used

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This commit is contained in:
Zach Hilman
2018-07-27 23:55:23 -04:00
parent d2ad279a32
commit df5b75694f
36 changed files with 1463 additions and 43 deletions
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168
src/core/file_sys/content_archive.cpp
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@ -6,9 +6,12 @@
#include <utility>
#include "common/logging/log.h"
#include "core/crypto/aes_util.h"
#include "core/crypto/ctr_encryption_layer.h"
#include "core/file_sys/content_archive.h"
#include "core/file_sys/vfs_offset.h"
#include "core/loader/loader.h"
#include "mbedtls/cipher.h"
#include "romfs.h"
namespace FileSys {
@ -29,11 +32,19 @@ enum class NCASectionFilesystemType : u8 {
struct NCASectionHeaderBlock {
INSERT_PADDING_BYTES(3);
NCASectionFilesystemType filesystem_type;
u8 crypto_type;
NCASectionCryptoType crypto_type;
INSERT_PADDING_BYTES(3);
};
static_assert(sizeof(NCASectionHeaderBlock) == 0x8, "NCASectionHeaderBlock has incorrect size.");
struct NCASectionRaw {
NCASectionHeaderBlock header;
std::array<u8, 0x138> block_data;
std::array<u8, 0x8> section_ctr;
INSERT_PADDING_BYTES(0xB8);
};
static_assert(sizeof(NCASectionRaw) == 0x200, "NCASectionRaw has incorrect size.");
struct PFS0Superblock {
NCASectionHeaderBlock header_block;
std::array<u8, 0x20> hash;
@ -43,62 +54,155 @@ struct PFS0Superblock {
u64_le hash_table_size;
u64_le pfs0_header_offset;
u64_le pfs0_size;
INSERT_PADDING_BYTES(432);
INSERT_PADDING_BYTES(0x1B0);
};
static_assert(sizeof(PFS0Superblock) == 0x200, "PFS0Superblock has incorrect size.");
struct RomFSSuperblock {
NCASectionHeaderBlock header_block;
IVFCHeader ivfc;
INSERT_PADDING_BYTES(0x118);
};
static_assert(sizeof(RomFSSuperblock) == 0xE8, "RomFSSuperblock has incorrect size.");
static_assert(sizeof(RomFSSuperblock) == 0x200, "RomFSSuperblock has incorrect size.");
union NCASectionHeader {
NCASectionRaw raw;
PFS0Superblock pfs0;
RomFSSuperblock romfs;
};
static_assert(sizeof(NCASectionHeader) == 0x200, "NCASectionHeader has incorrect size.");
bool IsValidNCA(const NCAHeader& header) {
// TODO(DarkLordZach): Add NCA2/NCA0 support.
return header.magic == Common::MakeMagic('N', 'C', 'A', '3');
}
Crypto::Key128 NCA::GetKeyAreaKey(NCASectionCryptoType type) {
u8 master_key_id = header.crypto_type;
if (header.crypto_type_2 > master_key_id)
master_key_id = header.crypto_type_2;
if (master_key_id > 0)
--master_key_id;
std::vector<u8> key_area(header.key_area.begin(), header.key_area.end());
if (!Crypto::keys.ValidateKey(Crypto::S128KeyType::KEY_AREA, master_key_id, header.key_index)) {
status = Loader::ResultStatus::ErrorEncrypted;
return {};
}
Crypto::AESCipher<Crypto::Key128> cipher(
Crypto::keys.GetKey(Crypto::S128KeyType::KEY_AREA, master_key_id, header.key_index),
Crypto::Mode::ECB);
cipher.Transcode(key_area.data(), key_area.size(), key_area.data(), Crypto::Op::DECRYPT);
Crypto::Key128 out;
if (type == NCASectionCryptoType::XTS)
std::copy(key_area.begin(), key_area.begin() + 0x10, out.begin());
else if (type == NCASectionCryptoType::CTR)
std::copy(key_area.begin() + 0x20, key_area.begin() + 0x30, out.begin());
else
LOG_CRITICAL(Crypto, "Called GetKeyAreaKey on invalid NCASectionCryptoType type={:02X}",
static_cast<u8>(type));
u128 out_128 = *reinterpret_cast<u128*>(&out);
LOG_DEBUG(Crypto, "called with crypto_rev={:02X}, kak_index={:02X}, key={:016X}{:016X}",
master_key_id, header.key_index, out_128[1], out_128[0]);
return out;
}
VirtualFile NCA::Decrypt(NCASectionHeader header, VirtualFile in, u64 starting_offset) {
if (!encrypted)
return in;
switch (header.raw.header.crypto_type) {
case NCASectionCryptoType::NONE:
LOG_DEBUG(Crypto, "called with mode=NONE");
return in;
case NCASectionCryptoType::CTR:
LOG_DEBUG(Crypto, "called with mode=CTR, starting_offset={:016X}", starting_offset);
{
auto out = std::make_shared<Crypto::CTREncryptionLayer>(
std::move(in), GetKeyAreaKey(NCASectionCryptoType::CTR), starting_offset);
std::vector<u8> iv(16, 0);
for (u8 i = 0; i < 8; ++i)
iv[i] = header.raw.section_ctr[0x8 - i - 1];
out->SetIV(iv);
return out;
}
case NCASectionCryptoType::XTS:
// TODO(DarkLordZach): Implement XTSEncryptionLayer and title key encryption.
default:
LOG_ERROR(Crypto, "called with unhandled crypto type={:02X}",
static_cast<u8>(header.raw.header.crypto_type));
return nullptr;
}
}
NCA::NCA(VirtualFile file_) : file(std::move(file_)) {
if (sizeof(NCAHeader) != file->ReadObject(&header))
LOG_CRITICAL(Loader, "File reader errored out during header read.");
LOG_ERROR(Loader, "File reader errored out during header read.");
encrypted = false;
if (!IsValidNCA(header)) {
status = Loader::ResultStatus::ErrorInvalidFormat;
return;
NCAHeader dec_header{};
if (!Crypto::keys.ValidateKey(Crypto::S256KeyType::HEADER)) {
status = Loader::ResultStatus::ErrorEncrypted;
return;
}
Crypto::AESCipher<Crypto::Key256> cipher(Crypto::keys.GetKey(Crypto::S256KeyType::HEADER),
Crypto::Mode::XTS);
cipher.XTSTranscode(&header, sizeof(NCAHeader), &dec_header, 0, 0x200, Crypto::Op::DECRYPT);
if (IsValidNCA(dec_header)) {
header = dec_header;
encrypted = true;
} else {
status = Loader::ResultStatus::ErrorInvalidFormat;
return;
}
}
std::ptrdiff_t number_sections =
const std::ptrdiff_t number_sections =
std::count_if(std::begin(header.section_tables), std::end(header.section_tables),
[](NCASectionTableEntry entry) { return entry.media_offset > 0; });
std::vector<NCASectionHeader> sections(number_sections);
const auto length_sections = SECTION_HEADER_SIZE * number_sections;
if (encrypted) {
auto raw = file->ReadBytes(length_sections, SECTION_HEADER_OFFSET);
if (!Crypto::keys.ValidateKey(Crypto::S256KeyType::HEADER)) {
status = Loader::ResultStatus::ErrorEncrypted;
return;
}
Crypto::AESCipher<Crypto::Key256> cipher(Crypto::keys.GetKey(Crypto::S256KeyType::HEADER),
Crypto::Mode::XTS);
cipher.XTSTranscode(raw.data(), length_sections, sections.data(), 2, SECTION_HEADER_SIZE,
Crypto::Op::DECRYPT);
} else {
file->ReadBytes(sections.data(), length_sections, SECTION_HEADER_OFFSET);
}
for (std::ptrdiff_t i = 0; i < number_sections; ++i) {
// Seek to beginning of this section.
NCASectionHeaderBlock block{};
if (sizeof(NCASectionHeaderBlock) !=
file->ReadObject(&block, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
LOG_CRITICAL(Loader, "File reader errored out during header read.");
if (block.filesystem_type == NCASectionFilesystemType::ROMFS) {
RomFSSuperblock sb{};
if (sizeof(RomFSSuperblock) !=
file->ReadObject(&sb, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
LOG_CRITICAL(Loader, "File reader errored out during header read.");
auto section = sections[i];
if (section.raw.header.filesystem_type == NCASectionFilesystemType::ROMFS) {
const size_t romfs_offset =
header.section_tables[i].media_offset * MEDIA_OFFSET_MULTIPLIER +
sb.ivfc.levels[IVFC_MAX_LEVEL - 1].offset;
const size_t romfs_size = sb.ivfc.levels[IVFC_MAX_LEVEL - 1].size;
files.emplace_back(std::make_shared<OffsetVfsFile>(file, romfs_size, romfs_offset));
section.romfs.ivfc.levels[IVFC_MAX_LEVEL - 1].offset;
const size_t romfs_size = section.romfs.ivfc.levels[IVFC_MAX_LEVEL - 1].size;
files.emplace_back(
Decrypt(section, std::make_shared<OffsetVfsFile>(file, romfs_size, romfs_offset),
romfs_offset));
romfs = files.back();
} else if (block.filesystem_type == NCASectionFilesystemType::PFS0) {
PFS0Superblock sb{};
// Seek back to beginning of this section.
if (sizeof(PFS0Superblock) !=
file->ReadObject(&sb, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
LOG_CRITICAL(Loader, "File reader errored out during header read.");
} else if (section.raw.header.filesystem_type == NCASectionFilesystemType::PFS0) {
u64 offset = (static_cast<u64>(header.section_tables[i].media_offset) *
MEDIA_OFFSET_MULTIPLIER) +
sb.pfs0_header_offset;
section.pfs0.pfs0_header_offset;
u64 size = MEDIA_OFFSET_MULTIPLIER * (header.section_tables[i].media_end_offset -
header.section_tables[i].media_offset);
auto npfs = std::make_shared<PartitionFilesystem>(
std::make_shared<OffsetVfsFile>(file, size, offset));
Decrypt(section, std::make_shared<OffsetVfsFile>(file, size, offset), offset));
if (npfs->GetStatus() == Loader::ResultStatus::Success) {
dirs.emplace_back(npfs);
@ -153,6 +257,10 @@ VirtualDir NCA::GetExeFS() const {
return exefs;
}
VirtualFile NCA::GetBaseFile() const {
return file;
}
bool NCA::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
return false;
}