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Implement SeedDB & Seed Crypto

This commit is contained in:
Valentin Vanelslande 2018-10-01 10:42:10 -05:00
parent fb720c00b7
commit b067b5aa5a
6 changed files with 229 additions and 11 deletions
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2
src/core/CMakeLists.txt
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@ -69,6 +69,8 @@ add_library(core STATIC
file_sys/romfs_reader.h
file_sys/savedata_archive.cpp
file_sys/savedata_archive.h
file_sys/seed_db.cpp
file_sys/seed_db.h
file_sys/ticket.cpp
file_sys/ticket.h
file_sys/title_metadata.cpp

18
src/core/file_sys/ncch_container.cpp
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@ -7,10 +7,12 @@
#include <memory>
#include <cryptopp/aes.h>
#include <cryptopp/modes.h>
#include <cryptopp/sha.h>
#include "common/common_types.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/file_sys/ncch_container.h"
#include "core/file_sys/seed_db.h"
#include "core/hw/aes/key.h"
#include "core/loader/loader.h"
@ -166,9 +168,19 @@ Loader::ResultStatus NCCHContainer::Load() {
if (!ncch_header.seed_crypto) {
key_y_secondary = key_y_primary;
} else {
// Seed crypto is unimplemented.
LOG_ERROR(Service_FS, "Unsupported seed crypto");
failed_to_decrypt = true;
auto opt{FileSys::GetSeed(ncch_header.program_id)};
if (!opt.has_value()) {
LOG_ERROR(Service_FS, "Seed for program {:016X} not found",
ncch_header.program_id);
failed_to_decrypt = true;
} else {
auto seed{*opt};
std::array<u8, 32> input;
std::memcpy(input.data(), key_y_primary.data(), key_y_primary.size());
std::memcpy(input.data() + key_y_primary.size(), seed.data(), seed.size());
CryptoPP::SHA256 sha;
sha.CalculateDigest(key_y_secondary.data(), input.data(), input.size());
}
}
SetKeyY(KeySlotID::NCCHSecure1, key_y_primary);

149
src/core/file_sys/seed_db.cpp Normal file
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@ -0,0 +1,149 @@
// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <fmt/format.h>
#include "common/file_util.h"
#include "common/logging/log.h"
#include "core/file_sys/seed_db.h"
namespace FileSys {
bool SeedDB::Load() {
seeds.clear();
const std::string path{
fmt::format("{}/seeddb.bin", FileUtil::GetUserPath(FileUtil::UserPath::SysDataDir))};
if (!FileUtil::Exists(path)) {
if (!FileUtil::CreateFullPath(path)) {
LOG_ERROR(Service_FS, "Failed to create seed database");
return false;
}
if (!Save()) {
LOG_ERROR(Service_FS, "Failed to save seed database");
return false;
}
return true;
}
FileUtil::IOFile file{path, "rb"};
if (!file.IsOpen()) {
LOG_ERROR(Service_FS, "Failed to open seed database");
return false;
}
u32 count;
if (!file.ReadBytes(&count, sizeof(count))) {
LOG_ERROR(Service_FS, "Failed to read seed database count fully");
return false;
}
if (!file.Seek(file.Tell() + SEEDDB_PADDING_BYTES, SEEK_SET)) {
LOG_ERROR(Service_FS, "Failed to skip seed database padding");
return false;
}
for (u32 i = 0; i < count; ++i) {
Seed seed;
if (!file.ReadBytes(&seed.title_id, sizeof(seed.title_id))) {
LOG_ERROR(Service_FS, "Failed to read seed {} title ID", i);
return false;
}
if (!file.ReadBytes(seed.data.data(), seed.data.size())) {
LOG_ERROR(Service_FS, "Failed to read seed {} data", i);
return false;
}
if (!file.ReadBytes(seed.reserved.data(), seed.reserved.size())) {
LOG_ERROR(Service_FS, "Failed to read seed {} reserved data", i);
return false;
}
seeds.push_back(seed);
}
return true;
}
bool SeedDB::Save() {
const std::string path{
fmt::format("{}/seeddb.bin", FileUtil::GetUserPath(FileUtil::UserPath::SysDataDir))};
if (!FileUtil::CreateFullPath(path)) {
LOG_ERROR(Service_FS, "Failed to create seed database");
return false;
}
FileUtil::IOFile file{path, "wb"};
if (!file.IsOpen()) {
LOG_ERROR(Service_FS, "Failed to open seed database");
return false;
}
u32 count{static_cast<u32>(seeds.size())};
if (file.WriteBytes(&count, sizeof(count)) != sizeof(count)) {
LOG_ERROR(Service_FS, "Failed to write seed database count fully");
return false;
}
std::array<u8, SEEDDB_PADDING_BYTES> padding{};
if (file.WriteBytes(padding.data(), padding.size()) != padding.size()) {
LOG_ERROR(Service_FS, "Failed to write seed database padding fully");
return false;
}
for (std::size_t i = 0; i < count; ++i) {
if (file.WriteBytes(&seeds[i].title_id, sizeof(seeds[i].title_id)) !=
sizeof(seeds[i].title_id)) {
LOG_ERROR(Service_FS, "Failed to write seed {} title ID fully", i);
return false;
}
if (file.WriteBytes(seeds[i].data.data(), seeds[i].data.size()) != seeds[i].data.size()) {
LOG_ERROR(Service_FS, "Failed to write seed {} data fully", i);
return false;
}
if (file.WriteBytes(seeds[i].reserved.data(), seeds[i].reserved.size()) !=
seeds[i].reserved.size()) {
LOG_ERROR(Service_FS, "Failed to write seed {} reserved data fully", i);
return false;
}
}
return true;
}
void SeedDB::Add(const Seed& seed) {
seeds.push_back(seed);
}
std::size_t SeedDB::GetCount() const {
return seeds.size();
}
auto SeedDB::FindSeedByTitleID(u64 title_id) const {
return std::find_if(seeds.begin(), seeds.end(),
[title_id](const auto& seed) { return seed.title_id == title_id; });
}
bool AddSeed(const Seed& seed) {
// TODO: does this skip/replace if the SeedDB contains a seed for seed.title_id?
SeedDB db;
if (!db.Load()) {
LOG_ERROR(Service_FS, "Failed to load seed database");
return false;
}
db.Add(seed);
if (!db.Save()) {
LOG_ERROR(Service_FS, "Failed to save seed database");
return false;
}
return true;
}
std::optional<Seed::Data> GetSeed(u64 title_id) {
SeedDB db;
if (!db.Load()) {
return std::nullopt;
}
const auto found_seed_iter{db.FindSeedByTitleID(title_id)};
if (found_seed_iter != db.seeds.end()) {
return found_seed_iter->data;
}
return std::nullopt;
}
u32 GetSeedCount() {
SeedDB db;
if (!db.Load()) {
return 0;
}
return db.GetCount();
}
} // namespace FileSys

38
src/core/file_sys/seed_db.h Normal file
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@ -0,0 +1,38 @@
// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <array>
#include <optional>
#include <vector>
#include "common/common_types.h"
#include "common/swap.h"
namespace FileSys {
constexpr std::size_t SEEDDB_PADDING_BYTES{12};
struct Seed {
using Data = std::array<u8, 16>;
u64_le title_id;
Data data;
std::array<u8, 8> reserved;
};
struct SeedDB {
std::vector<Seed> seeds;
bool Load();
bool Save();
void Add(const Seed& seed);
std::size_t GetCount() const;
auto FindSeedByTitleID(u64 title_id) const;
};
bool AddSeed(const Seed& seed);
std::optional<Seed::Data> GetSeed(u64 title_id);
u32 GetSeedCount();
} // namespace FileSys

21
src/core/hle/service/fs/fs_user.cpp
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@ -11,6 +11,7 @@
#include "common/string_util.h"
#include "core/core.h"
#include "core/file_sys/errors.h"
#include "core/file_sys/seed_db.h"
#include "core/hle/ipc.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/client_port.h"
@ -685,14 +686,18 @@ void FS_USER::ObsoletedDeleteExtSaveData(Kernel::HLERequestContext& ctx) {
}
void FS_USER::GetNumSeeds(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x87D, 0, 0);
LOG_WARNING(Service_FS, "(STUBBED) called");
IPC::RequestBuilder rb = rp.MakeBuilder(2, 0);
IPC::RequestBuilder rb{ctx, 0x87D, 2, 0};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(FileSys::GetSeedCount());
}
void FS_USER::AddSeed(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx, 0x87A, 6, 0};
u64 title_id{rp.Pop<u64>()};
FileSys::Seed::Data seed{rp.PopRaw<FileSys::Seed::Data>()};
FileSys::AddSeed({title_id, seed, {}});
IPC::RequestBuilder rb{rp.MakeBuilder(1, 0)};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(0);
}
void FS_USER::SetSaveDataSecureValue(Kernel::HLERequestContext& ctx) {
@ -846,7 +851,7 @@ FS_USER::FS_USER() : ServiceFramework("fs:USER", 30) {
{0x08680000, nullptr, "GetMediaType"},
{0x08690000, nullptr, "GetNandEraseCount"},
{0x086A0082, nullptr, "ReadNandReport"},
{0x087A0180, nullptr, "AddSeed"},
{0x087A0180, &FS_USER::AddSeed, "AddSeed"},
{0x087D0000, &FS_USER::GetNumSeeds, "GetNumSeeds"},
{0x088600C0, nullptr, "CheckUpdatedDat"},
};

12
src/core/hle/service/fs/fs_user.h
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@ -485,6 +485,18 @@ private:
*/
void GetNumSeeds(Kernel::HLERequestContext& ctx);
/**
* FS_User::AddSeed service function.
* Inputs:
* 0 : 0x087A0180
* 1-2 : u64, Title ID
* 3-6 : Seed
* Outputs:
* 0 : 0x087A0180
* 1 : Result of function, 0 on success, otherwise error code
*/
void AddSeed(Kernel::HLERequestContext& ctx);
/**
* FS_User::SetSaveDataSecureValue service function.
* Inputs: