Atmosphere/stratosphere/boot/source/updater/updater_bis_management.hpp
2019-05-09 01:17:56 -07:00

243 lines
7.8 KiB
C++

/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <switch.h>
#include <stratosphere.hpp>
#include "updater_types.hpp"
class BisAccessor {
public:
static constexpr size_t SectorAlignment = 0x200;
private:
FsStorage storage = {};
u32 partition_id;
bool active;
public:
BisAccessor(u32 id) : partition_id(id), active(false) { }
~BisAccessor() {
if (this->active) {
fsStorageClose(&storage);
}
}
public:
Result Initialize();
void Finalize();
protected:
Result Read(void *dst, size_t size, u64 offset);
Result Write(u64 offset, const void *src, size_t size);
Result Write(u64 offset, size_t size, const char *bip_path, void *work_buffer, size_t work_buffer_size);
Result Clear(u64 offset, u64 size, void *work_buffer, size_t work_buffer_size);
Result GetHash(void *dst, u64 offset, u64 size, u64 hash_size, void *work_buffer, size_t work_buffer_size);
};
template<typename EnumType>
struct OffsetSizeEntry {
EnumType which;
u64 offset;
size_t size;
};
enum class Boot0Partition {
BctNormalMain,
BctSafeMain,
BctNormalSub,
BctSafeSub,
BctSave,
Package1NormalMain,
Package1NormalSub,
Eks,
Count,
};
enum class Boot1Partition {
Package1SafeMain,
Package1SafeSub,
Package1RepairMain,
Package1RepairSub,
Count,
};
enum class Package2Partition {
BootConfig,
Package2,
Count,
};
struct Boot0Meta {
using EnumType = Boot0Partition;
using OffsetSizeType = OffsetSizeEntry<EnumType>;
static constexpr size_t NumEntries = static_cast<size_t>(EnumType::Count);
static constexpr OffsetSizeType Entries[NumEntries] = {
{Boot0Partition::BctNormalMain, 0 * BctSize, BctSize},
{Boot0Partition::BctSafeMain, 1 * BctSize, BctSize},
{Boot0Partition::BctNormalSub, 2 * BctSize, BctSize},
{Boot0Partition::BctSafeSub, 3 * BctSize, BctSize},
{Boot0Partition::BctSave, 63 * BctSize, BctSize},
{Boot0Partition::Package1NormalMain, 0x100000, 0x40000},
{Boot0Partition::Package1NormalSub, 0x140000, 0x40000},
{Boot0Partition::Eks, 0x180000, EksSize},
};
};
struct Boot1Meta {
using EnumType = Boot1Partition;
using OffsetSizeType = OffsetSizeEntry<EnumType>;
static constexpr size_t NumEntries = static_cast<size_t>(EnumType::Count);
static constexpr OffsetSizeType Entries[NumEntries] = {
{Boot1Partition::Package1SafeMain, 0x00000, 0x40000},
{Boot1Partition::Package1SafeSub, 0x40000, 0x40000},
{Boot1Partition::Package1RepairMain, 0x80000, 0x40000},
{Boot1Partition::Package1RepairSub, 0xC0000, 0x40000},
};
};
struct Package2Meta {
using EnumType = Package2Partition;
using OffsetSizeType = OffsetSizeEntry<EnumType>;
static constexpr size_t NumEntries = static_cast<size_t>(EnumType::Count);
static constexpr OffsetSizeType Entries[NumEntries] = {
{Package2Partition::BootConfig, 0x0000, 0x004000},
{Package2Partition::Package2, 0x4000, 0x7FC000},
};
};
template<typename Meta>
class PartitionAccessor : public BisAccessor {
public:
using EnumType = typename Meta::EnumType;
using OffsetSizeType = typename Meta::OffsetSizeType;
public:
PartitionAccessor(u32 id) : BisAccessor(id) { }
private:
constexpr const OffsetSizeType *FindEntry(EnumType which) {
for (size_t i = 0; i < Meta::NumEntries; i++) {
if (Meta::Entries[i].which == which) {
return &Meta::Entries[i];
}
}
std::abort();
}
public:
Result Read(size_t *out_size, void *dst, size_t size, EnumType which) {
const auto entry = FindEntry(which);
if (size < entry->size) {
std::abort();
}
Result rc = BisAccessor::Read(dst, entry->size, entry->offset);
if (R_FAILED(rc)) {
return rc;
}
*out_size = entry->size;
return ResultSuccess;
}
Result Write(const void *src, size_t size, EnumType which) {
const auto entry = FindEntry(which);
if (size > entry->size || size % BisAccessor::SectorAlignment != 0) {
std::abort();
}
return BisAccessor::Write(entry->offset, src, size);
}
Result Write(const char *bip_path, void *work_buffer, size_t work_buffer_size, EnumType which) {
const auto entry = FindEntry(which);
return BisAccessor::Write(entry->offset, entry->size, bip_path, work_buffer, work_buffer_size);
}
Result Clear(void *work_buffer, size_t work_buffer_size, EnumType which) {
const auto entry = FindEntry(which);
return BisAccessor::Clear(entry->offset, entry->size, work_buffer, work_buffer_size);
}
Result GetHash(void *dst, u64 hash_size, void *work_buffer, size_t work_buffer_size, EnumType which) {
const auto entry = FindEntry(which);
return BisAccessor::GetHash(dst, entry->offset, entry->size, hash_size, work_buffer, work_buffer_size);
}
};
static constexpr u32 BisStorageId_Boot0 = 0;
static constexpr u32 BisStorageId_Boot1 = 10;
enum class Package2Type {
NormalMain,
NormalSub,
SafeMain,
SafeSub,
RepairMain,
RepairSub,
};
static constexpr u32 GetPackage2StorageId(Package2Type which) {
switch (which) {
case Package2Type::NormalMain:
return 21;
case Package2Type::NormalSub:
return 22;
case Package2Type::SafeMain:
return 23;
case Package2Type::SafeSub:
return 24;
case Package2Type::RepairMain:
return 25;
case Package2Type::RepairSub:
return 26;
default:
std::abort();
}
}
class Boot0Accessor : public PartitionAccessor<Boot0Meta> {
public:
static constexpr u32 PartitionId = 0;
static constexpr size_t BctPubkOffset = 0x210;
static constexpr size_t BctPubkSize = 0x100;
static constexpr size_t BctEksOffset = 0x450;
static constexpr size_t BctVersionOffset = 0x2330;
static constexpr size_t BctVersionMax = 0x20;
public:
Boot0Accessor() : PartitionAccessor<Boot0Meta>(PartitionId) { }
private:
static size_t GetBootloaderVersion(void *bct);
static size_t GetEksIndex(size_t bootloader_version);
static void CopyEks(void *dst_bct, const void *src_eks, size_t eks_index);
public:
Result UpdateEks(void *dst_bct, void *eks_work_buffer);
Result UpdateEksManually(void *dst_bct, const void *src_eks);
Result PreserveAutoRcm(void *dst_bct, void *work_buffer, Boot0Partition which);
};
class Boot1Accessor : public PartitionAccessor<Boot1Meta> {
public:
static constexpr u32 PartitionId = 10;
public:
Boot1Accessor() : PartitionAccessor<Boot1Meta>(PartitionId) { }
};
class Package2Accessor : public PartitionAccessor<Package2Meta> {
public:
Package2Accessor(Package2Type which) : PartitionAccessor<Package2Meta>(GetPackage2StorageId(which)) { }
};