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Use ErrorEncrypted where applicable and fix no keys crash

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This commit is contained in:
Zach Hilman 2018-07-29 20:47:33 -04:00
parent 03149d3e4a
commit a9c921a41d
4 changed files with 36 additions and 16 deletions
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1
src/core/file_sys/card_image.cpp
View file

@ -45,6 +45,7 @@ XCI::XCI(VirtualFile file_) : file(std::move(file_)), partitions(0x4) {
status = result;
return;
}
result = AddNCAFromPartition(XCIPartition::Update);
if (result != Loader::ResultStatus::Success) {
status = result;

43
src/core/file_sys/content_archive.cpp
View file

@ -4,7 +4,7 @@
#include <algorithm>
#include <utility>
#include <boost/optional.hpp>
#include "common/logging/log.h"
#include "core/crypto/aes_util.h"
#include "core/crypto/ctr_encryption_layer.h"
@ -76,13 +76,16 @@ bool IsValidNCA(const NCAHeader& header) {
return header.magic == Common::MakeMagic('N', 'C', 'A', '3');
}
Core::Crypto::Key128 NCA::GetKeyAreaKey(NCASectionCryptoType type) const {
boost::optional<Core::Crypto::Key128> NCA::GetKeyAreaKey(NCASectionCryptoType type) const {
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;
if (!keys.HasKey(Core::Crypto::S128KeyType::KeyArea, master_key_id, header.key_index))
return boost::none;
std::vector<u8> key_area(header.key_area.begin(), header.key_area.end());
Core::Crypto::AESCipher<Core::Crypto::Key128> cipher(
keys.GetKey(Core::Crypto::S128KeyType::KeyArea, master_key_id, header.key_index),
@ -116,13 +119,16 @@ VirtualFile NCA::Decrypt(NCASectionHeader header, VirtualFile in, u64 starting_o
case NCASectionCryptoType::CTR:
LOG_DEBUG(Crypto, "called with mode=CTR, starting_offset={:016X}", starting_offset);
{
const auto key = GetKeyAreaKey(NCASectionCryptoType::CTR);
if (key == boost::none)
return nullptr;
auto out = std::make_shared<Core::Crypto::CTREncryptionLayer>(
std::move(in), GetKeyAreaKey(NCASectionCryptoType::CTR), starting_offset);
std::move(in), key.value(), starting_offset);
std::vector<u8> iv(16);
for (u8 i = 0; i < 8; ++i)
iv[i] = header.raw.section_ctr[0x8 - i - 1];
out->SetIV(iv);
return out;
return std::static_pointer_cast<VfsFile>(out);
}
case NCASectionCryptoType::XTS:
// TODO(DarkLordZach): Implement XTSEncryptionLayer and title key encryption.
@ -149,7 +155,10 @@ NCA::NCA(VirtualFile file_) : file(std::move(file_)) {
header = dec_header;
encrypted = true;
} else {
status = Loader::ResultStatus::ErrorInvalidFormat;
if (!keys.HasKey(Core::Crypto::S256KeyType::Header))
status = Loader::ResultStatus::ErrorEncrypted;
else
status = Loader::ResultStatus::ErrorInvalidFormat;
return;
}
}
@ -179,23 +188,29 @@ NCA::NCA(VirtualFile file_) : file(std::move(file_)) {
header.section_tables[i].media_offset * MEDIA_OFFSET_MULTIPLIER +
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(
const auto dec =
Decrypt(section, std::make_shared<OffsetVfsFile>(file, romfs_size, romfs_offset),
romfs_offset));
romfs = files.back();
romfs_offset);
if (dec != nullptr) {
files.emplace_back();
romfs = files.back();
}
} else if (section.raw.header.filesystem_type == NCASectionFilesystemType::PFS0) {
u64 offset = (static_cast<u64>(header.section_tables[i].media_offset) *
MEDIA_OFFSET_MULTIPLIER) +
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>(
Decrypt(section, std::make_shared<OffsetVfsFile>(file, size, offset), offset));
const auto dec =
Decrypt(section, std::make_shared<OffsetVfsFile>(file, size, offset), offset);
if (dec != nullptr) {
auto npfs = std::make_shared<PartitionFilesystem>(dec);
if (npfs->GetStatus() == Loader::ResultStatus::Success) {
dirs.emplace_back(npfs);
if (IsDirectoryExeFS(dirs.back()))
exefs = dirs.back();
if (npfs->GetStatus() == Loader::ResultStatus::Success) {
dirs.emplace_back(npfs);
if (IsDirectoryExeFS(dirs.back()))
exefs = dirs.back();
}
}
}
}

4
src/core/file_sys/content_archive.h
View file

@ -8,7 +8,7 @@
#include <memory>
#include <string>
#include <vector>
#include <boost/optional.hpp>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/swap.h"
@ -95,7 +95,7 @@ protected:
bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;
private:
Core::Crypto::Key128 GetKeyAreaKey(NCASectionCryptoType type) const;
boost::optional<Core::Crypto::Key128> GetKeyAreaKey(NCASectionCryptoType type) const;
VirtualFile Decrypt(NCASectionHeader header, VirtualFile in, u64 starting_offset) const;
std::vector<VirtualDir> dirs;

4
src/core/loader/xci.cpp
View file

@ -48,6 +48,10 @@ ResultStatus AppLoader_XCI::Load(Kernel::SharedPtr<Kernel::Process>& process) {
return ResultStatus::ErrorAlreadyLoaded;
}
if (xci->GetNCAFileByType(FileSys::NCAContentType::Program) == nullptr) {
return ResultStatus::ErrorEncrypted;
}
auto result = nca_loader->Load(process);
if (result != ResultStatus::Success)
return result;