mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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244 lines
9.5 KiB
C++
244 lines
9.5 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stratosphere.hpp>
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namespace ams::updater {
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class BisAccessor {
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NON_COPYABLE(BisAccessor);
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public:
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static constexpr size_t SectorAlignment = 0x200;
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private:
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std::unique_ptr<fs::IStorage> storage;
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const fs::BisPartitionId partition_id;
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public:
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explicit BisAccessor(fs::BisPartitionId id) : partition_id(id) { /* ... */ }
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public:
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Result Initialize();
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void Finalize();
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protected:
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Result Read(void *dst, size_t size, u64 offset);
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Result Write(u64 offset, const void *src, size_t size);
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Result Write(u64 offset, size_t size, const char *bip_path, void *work_buffer, size_t work_buffer_size);
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Result Clear(u64 offset, u64 size, void *work_buffer, size_t work_buffer_size);
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Result GetHash(void *dst, u64 offset, u64 size, u64 hash_size, void *work_buffer, size_t work_buffer_size);
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};
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template<typename EnumType>
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struct OffsetSizeEntry {
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EnumType which;
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u64 offset;
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size_t size;
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};
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enum class Boot0Partition {
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BctNormalMain,
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BctSafeMain,
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BctNormalSub,
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BctSafeSub,
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BctSave,
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Package1NormalMain,
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Package1NormalSub,
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Eks,
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Count,
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};
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enum class Boot1Partition {
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Package1SafeMain,
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Package1SafeSub,
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Package1RepairMain,
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Package1RepairSub,
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Count,
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};
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enum class Package2Partition {
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BootConfig,
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Package2,
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Count,
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};
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struct Boot0Meta {
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using EnumType = Boot0Partition;
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using OffsetSizeType = OffsetSizeEntry<EnumType>;
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static constexpr size_t NumEntries = static_cast<size_t>(EnumType::Count);
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static constexpr OffsetSizeType Entries[NumEntries] = {
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{Boot0Partition::BctNormalMain, 0 * BctSize, BctSize},
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{Boot0Partition::BctSafeMain, 1 * BctSize, BctSize},
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{Boot0Partition::BctNormalSub, 2 * BctSize, BctSize},
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{Boot0Partition::BctSafeSub, 3 * BctSize, BctSize},
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{Boot0Partition::BctSave, 63 * BctSize, BctSize},
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{Boot0Partition::Package1NormalMain, 0x100000, 0x40000},
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{Boot0Partition::Package1NormalSub, 0x140000, 0x40000},
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{Boot0Partition::Eks, 0x180000, EksSize},
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};
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};
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struct Boot1Meta {
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using EnumType = Boot1Partition;
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using OffsetSizeType = OffsetSizeEntry<EnumType>;
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static constexpr size_t NumEntries = static_cast<size_t>(EnumType::Count);
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static constexpr OffsetSizeType Entries[NumEntries] = {
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{Boot1Partition::Package1SafeMain, 0x00000, 0x40000},
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{Boot1Partition::Package1SafeSub, 0x40000, 0x40000},
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{Boot1Partition::Package1RepairMain, 0x80000, 0x40000},
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{Boot1Partition::Package1RepairSub, 0xC0000, 0x40000},
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};
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};
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struct Package2Meta {
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using EnumType = Package2Partition;
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using OffsetSizeType = OffsetSizeEntry<EnumType>;
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static constexpr size_t NumEntries = static_cast<size_t>(EnumType::Count);
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static constexpr OffsetSizeType Entries[NumEntries] = {
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{Package2Partition::BootConfig, 0x0000, 0x004000},
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{Package2Partition::Package2, 0x4000, 0x7FC000},
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};
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};
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template<typename Meta>
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class PartitionAccessor : public BisAccessor {
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NON_COPYABLE(PartitionAccessor);
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public:
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using EnumType = typename Meta::EnumType;
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using OffsetSizeType = typename Meta::OffsetSizeType;
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public:
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explicit PartitionAccessor(fs::BisPartitionId id) : BisAccessor(id) { /* ... */ }
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private:
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constexpr const OffsetSizeType *FindEntry(EnumType which) {
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const OffsetSizeType *entry = nullptr;
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for (size_t i = 0; i < Meta::NumEntries; i++) {
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if (Meta::Entries[i].which == which) {
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entry = &Meta::Entries[i];
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break;
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}
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}
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AMS_ABORT_UNLESS(entry != nullptr);
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return entry;
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}
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public:
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Result Read(size_t *out_size, void *dst, size_t size, EnumType which) {
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const auto entry = FindEntry(which);
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AMS_ABORT_UNLESS(size >= entry->size);
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R_TRY(BisAccessor::Read(dst, entry->size, entry->offset));
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*out_size = entry->size;
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return ResultSuccess();
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}
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Result Write(const void *src, size_t size, EnumType which) {
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const auto entry = FindEntry(which);
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AMS_ABORT_UNLESS(size <= entry->size);
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AMS_ABORT_UNLESS((size % BisAccessor::SectorAlignment) == 0);
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return BisAccessor::Write(entry->offset, src, size);
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}
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Result Write(const char *bip_path, void *work_buffer, size_t work_buffer_size, EnumType which) {
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const auto entry = FindEntry(which);
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return BisAccessor::Write(entry->offset, entry->size, bip_path, work_buffer, work_buffer_size);
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}
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Result Clear(void *work_buffer, size_t work_buffer_size, EnumType which) {
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const auto entry = FindEntry(which);
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return BisAccessor::Clear(entry->offset, entry->size, work_buffer, work_buffer_size);
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}
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Result GetHash(void *dst, u64 hash_size, void *work_buffer, size_t work_buffer_size, EnumType which) {
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const auto entry = FindEntry(which);
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return BisAccessor::GetHash(dst, entry->offset, entry->size, hash_size, work_buffer, work_buffer_size);
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}
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};
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enum class Package2Type {
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NormalMain,
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NormalSub,
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SafeMain,
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SafeSub,
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RepairMain,
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RepairSub,
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};
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static constexpr fs::BisPartitionId GetPackage2StorageId(Package2Type which) {
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switch (which) {
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case Package2Type::NormalMain:
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return fs::BisPartitionId::BootConfigAndPackage2Part1;
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case Package2Type::NormalSub:
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return fs::BisPartitionId::BootConfigAndPackage2Part2;
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case Package2Type::SafeMain:
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return fs::BisPartitionId::BootConfigAndPackage2Part3;
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case Package2Type::SafeSub:
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return fs::BisPartitionId::BootConfigAndPackage2Part4;
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case Package2Type::RepairMain:
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return fs::BisPartitionId::BootConfigAndPackage2Part5;
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case Package2Type::RepairSub:
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return fs::BisPartitionId::BootConfigAndPackage2Part6;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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}
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class Boot0Accessor : public PartitionAccessor<Boot0Meta> {
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public:
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static constexpr fs::BisPartitionId PartitionId = fs::BisPartitionId::BootPartition1Root;
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static constexpr size_t BctPubkOffsetErista = 0x210;
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static constexpr size_t BctPubkOffsetMariko = 0x10;
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static constexpr size_t BctPubkSize = 0x100;
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static constexpr size_t BctEksOffset = 0x450;
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static constexpr size_t BctVersionOffset = 0x2330;
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static constexpr size_t BctVersionMax = 0x20;
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public:
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Boot0Accessor() : PartitionAccessor<Boot0Meta>(PartitionId) { }
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private:
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static size_t GetBootloaderVersion(void *bct);
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static size_t GetEksIndex(size_t bootloader_version);
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static void CopyEks(void *dst_bct, const void *src_eks, size_t eks_index);
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static size_t GetBctPubkOffset(BootImageUpdateType boot_image_update_type) {
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switch (boot_image_update_type) {
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case BootImageUpdateType::Erista:
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return BctPubkOffsetErista;
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case BootImageUpdateType::Mariko:
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return BctPubkOffsetMariko;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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}
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public:
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Result UpdateEks(void *dst_bct, void *eks_work_buffer);
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Result UpdateEksManually(void *dst_bct, const void *src_eks);
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Result PreserveAutoRcm(void *dst_bct, void *work_buffer, Boot0Partition which);
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Result DetectCustomPublicKey(bool *out, void *work_buffer, BootImageUpdateType boot_image_update_type);
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};
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class Boot1Accessor : public PartitionAccessor<Boot1Meta> {
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public:
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static constexpr fs::BisPartitionId PartitionId = fs::BisPartitionId::BootPartition2Root;
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public:
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Boot1Accessor() : PartitionAccessor<Boot1Meta>(PartitionId) { }
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};
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class Package2Accessor : public PartitionAccessor<Package2Meta> {
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public:
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Package2Accessor(Package2Type which) : PartitionAccessor<Package2Meta>(GetPackage2StorageId(which)) { }
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};
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}
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