mirror of https://github.com/yuzu-emu/yuzu
297 lines
12 KiB
C++
297 lines
12 KiB
C++
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <algorithm>
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#include <cstring>
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#include <vector>
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "common/swap.h"
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#include "core/core.h"
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#include "core/file_sys/content_archive.h"
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#include "core/file_sys/nca_metadata.h"
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#include "core/file_sys/registered_cache.h"
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#include "core/file_sys/romfs.h"
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#include "core/file_sys/system_archive/system_archive.h"
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#include "core/hle/kernel/k_shared_memory.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/physical_memory.h"
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#include "core/hle/service/filesystem/filesystem.h"
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#include "core/hle/service/ipc_helpers.h"
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#include "core/hle/service/ns/iplatform_service_manager.h"
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namespace Service::NS {
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struct FontRegion {
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u32 offset;
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u32 size;
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};
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// The below data is specific to shared font data dumped from Switch on f/w 2.2
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// Virtual address and offsets/sizes likely will vary by dump
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[[maybe_unused]] constexpr VAddr SHARED_FONT_MEM_VADDR{0x00000009d3016000ULL};
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constexpr u32 EXPECTED_RESULT{0x7f9a0218}; // What we expect the decrypted bfttf first 4 bytes to be
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constexpr u32 EXPECTED_MAGIC{0x36f81a1e}; // What we expect the encrypted bfttf first 4 bytes to be
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constexpr u64 SHARED_FONT_MEM_SIZE{0x1100000};
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constexpr FontRegion EMPTY_REGION{0, 0};
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enum class LoadState : u32 {
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Loading = 0,
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Done = 1,
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};
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static void DecryptSharedFont(const std::vector<u32>& input, Kernel::PhysicalMemory& output,
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std::size_t& offset) {
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ASSERT_MSG(offset + (input.size() * sizeof(u32)) < SHARED_FONT_MEM_SIZE,
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"Shared fonts exceeds 17mb!");
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ASSERT_MSG(input[0] == EXPECTED_MAGIC, "Failed to derive key, unexpected magic number");
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const u32 KEY = input[0] ^ EXPECTED_RESULT; // Derive key using an inverse xor
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std::vector<u32> transformed_font(input.size());
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// TODO(ogniK): Figure out a better way to do this
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std::transform(input.begin(), input.end(), transformed_font.begin(),
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[&KEY](u32 font_data) { return Common::swap32(font_data ^ KEY); });
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transformed_font[1] = Common::swap32(transformed_font[1]) ^ KEY; // "re-encrypt" the size
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std::memcpy(output.data() + offset, transformed_font.data(),
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transformed_font.size() * sizeof(u32));
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offset += transformed_font.size() * sizeof(u32);
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}
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void DecryptSharedFontToTTF(const std::vector<u32>& input, std::vector<u8>& output) {
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ASSERT_MSG(input[0] == EXPECTED_MAGIC, "Failed to derive key, unexpected magic number");
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if (input.size() < 2) {
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LOG_ERROR(Service_NS, "Input font is empty");
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return;
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}
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const u32 KEY = input[0] ^ EXPECTED_RESULT; // Derive key using an inverse xor
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std::vector<u32> transformed_font(input.size());
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// TODO(ogniK): Figure out a better way to do this
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std::transform(input.begin(), input.end(), transformed_font.begin(),
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[&KEY](u32 font_data) { return Common::swap32(font_data ^ KEY); });
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std::memcpy(output.data(), transformed_font.data() + 2,
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(transformed_font.size() - 2) * sizeof(u32));
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}
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void EncryptSharedFont(const std::vector<u32>& input, std::vector<u8>& output,
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std::size_t& offset) {
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ASSERT_MSG(offset + (input.size() * sizeof(u32)) < SHARED_FONT_MEM_SIZE,
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"Shared fonts exceeds 17mb!");
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const auto key = Common::swap32(EXPECTED_RESULT ^ EXPECTED_MAGIC);
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std::vector<u32> transformed_font(input.size() + 2);
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transformed_font[0] = Common::swap32(EXPECTED_MAGIC);
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transformed_font[1] = Common::swap32(static_cast<u32>(input.size() * sizeof(u32))) ^ key;
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std::transform(input.begin(), input.end(), transformed_font.begin() + 2,
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[key](u32 in) { return in ^ key; });
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std::memcpy(output.data() + offset, transformed_font.data(),
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transformed_font.size() * sizeof(u32));
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offset += transformed_font.size() * sizeof(u32);
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}
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// Helper function to make BuildSharedFontsRawRegions a bit nicer
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static u32 GetU32Swapped(const u8* data) {
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u32 value;
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std::memcpy(&value, data, sizeof(value));
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return Common::swap32(value);
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}
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struct IPlatformServiceManager::Impl {
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const FontRegion& GetSharedFontRegion(std::size_t index) const {
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if (index >= shared_font_regions.size() || shared_font_regions.empty()) {
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// No font fallback
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return EMPTY_REGION;
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}
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return shared_font_regions.at(index);
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}
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void BuildSharedFontsRawRegions(const Kernel::PhysicalMemory& input) {
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// As we can derive the xor key we can just populate the offsets
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// based on the shared memory dump
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unsigned cur_offset = 0;
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for (std::size_t i = 0; i < SHARED_FONTS.size(); i++) {
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// Out of shared fonts/invalid font
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if (GetU32Swapped(input.data() + cur_offset) != EXPECTED_RESULT) {
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break;
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}
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// Derive key within inverse xor
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const u32 KEY = GetU32Swapped(input.data() + cur_offset) ^ EXPECTED_MAGIC;
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const u32 SIZE = GetU32Swapped(input.data() + cur_offset + 4) ^ KEY;
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shared_font_regions.push_back(FontRegion{cur_offset + 8, SIZE});
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cur_offset += SIZE + 8;
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}
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}
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/// Backing memory for the shared font data
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std::shared_ptr<Kernel::PhysicalMemory> shared_font;
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// Automatically populated based on shared_fonts dump or system archives.
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std::vector<FontRegion> shared_font_regions;
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};
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IPlatformServiceManager::IPlatformServiceManager(Core::System& system_, const char* service_name_)
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: ServiceFramework{system_, service_name_}, impl{std::make_unique<Impl>()} {
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// clang-format off
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static const FunctionInfo functions[] = {
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{0, &IPlatformServiceManager::RequestLoad, "RequestLoad"},
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{1, &IPlatformServiceManager::GetLoadState, "GetLoadState"},
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{2, &IPlatformServiceManager::GetSize, "GetSize"},
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{3, &IPlatformServiceManager::GetSharedMemoryAddressOffset, "GetSharedMemoryAddressOffset"},
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{4, &IPlatformServiceManager::GetSharedMemoryNativeHandle, "GetSharedMemoryNativeHandle"},
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{5, &IPlatformServiceManager::GetSharedFontInOrderOfPriority, "GetSharedFontInOrderOfPriority"},
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{6, nullptr, "GetSharedFontInOrderOfPriorityForSystem"},
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{100, nullptr, "RequestApplicationFunctionAuthorization"},
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{101, nullptr, "RequestApplicationFunctionAuthorizationByProcessId"},
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{102, nullptr, "RequestApplicationFunctionAuthorizationByApplicationId"},
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{103, nullptr, "RefreshApplicationFunctionBlackListDebugRecord"},
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{104, nullptr, "RequestApplicationFunctionAuthorizationByProgramId"},
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{105, nullptr, "GetFunctionBlackListSystemVersionToAuthorize"},
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{106, nullptr, "GetFunctionBlackListVersion"},
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{1000, nullptr, "LoadNgWordDataForPlatformRegionChina"},
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{1001, nullptr, "GetNgWordDataSizeForPlatformRegionChina"},
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};
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// clang-format on
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RegisterHandlers(functions);
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auto& fsc = system.GetFileSystemController();
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// Attempt to load shared font data from disk
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const auto* nand = fsc.GetSystemNANDContents();
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std::size_t offset = 0;
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// Rebuild shared fonts from data ncas or synthesize
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impl->shared_font = std::make_shared<Kernel::PhysicalMemory>(SHARED_FONT_MEM_SIZE);
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for (auto font : SHARED_FONTS) {
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FileSys::VirtualFile romfs;
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const auto nca =
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nand->GetEntry(static_cast<u64>(font.first), FileSys::ContentRecordType::Data);
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if (nca) {
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romfs = nca->GetRomFS();
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}
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if (!romfs) {
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romfs = FileSys::SystemArchive::SynthesizeSystemArchive(static_cast<u64>(font.first));
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}
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if (!romfs) {
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LOG_ERROR(Service_NS, "Failed to find or synthesize {:016X}! Skipping", font.first);
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continue;
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}
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const auto extracted_romfs = FileSys::ExtractRomFS(romfs);
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if (!extracted_romfs) {
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LOG_ERROR(Service_NS, "Failed to extract RomFS for {:016X}! Skipping", font.first);
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continue;
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}
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const auto font_fp = extracted_romfs->GetFile(font.second);
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if (!font_fp) {
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LOG_ERROR(Service_NS, "{:016X} has no file \"{}\"! Skipping", font.first, font.second);
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continue;
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}
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std::vector<u32> font_data_u32(font_fp->GetSize() / sizeof(u32));
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font_fp->ReadBytes<u32>(font_data_u32.data(), font_fp->GetSize());
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// We need to be BigEndian as u32s for the xor encryption
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std::transform(font_data_u32.begin(), font_data_u32.end(), font_data_u32.begin(),
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Common::swap32);
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// Font offset and size do not account for the header
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const FontRegion region{static_cast<u32>(offset + 8),
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static_cast<u32>((font_data_u32.size() * sizeof(u32)) - 8)};
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DecryptSharedFont(font_data_u32, *impl->shared_font, offset);
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impl->shared_font_regions.push_back(region);
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}
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}
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IPlatformServiceManager::~IPlatformServiceManager() = default;
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void IPlatformServiceManager::RequestLoad(HLERequestContext& ctx) {
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IPC::RequestParser rp{ctx};
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const u32 shared_font_type{rp.Pop<u32>()};
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// Games don't call this so all fonts should be loaded
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LOG_DEBUG(Service_NS, "called, shared_font_type={}", shared_font_type);
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IPC::ResponseBuilder rb{ctx, 2};
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rb.Push(ResultSuccess);
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}
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void IPlatformServiceManager::GetLoadState(HLERequestContext& ctx) {
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IPC::RequestParser rp{ctx};
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const u32 font_id{rp.Pop<u32>()};
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LOG_DEBUG(Service_NS, "called, font_id={}", font_id);
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IPC::ResponseBuilder rb{ctx, 3};
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rb.Push(ResultSuccess);
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rb.Push<u32>(static_cast<u32>(LoadState::Done));
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}
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void IPlatformServiceManager::GetSize(HLERequestContext& ctx) {
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IPC::RequestParser rp{ctx};
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const u32 font_id{rp.Pop<u32>()};
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LOG_DEBUG(Service_NS, "called, font_id={}", font_id);
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IPC::ResponseBuilder rb{ctx, 3};
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rb.Push(ResultSuccess);
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rb.Push<u32>(impl->GetSharedFontRegion(font_id).size);
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}
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void IPlatformServiceManager::GetSharedMemoryAddressOffset(HLERequestContext& ctx) {
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IPC::RequestParser rp{ctx};
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const u32 font_id{rp.Pop<u32>()};
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LOG_DEBUG(Service_NS, "called, font_id={}", font_id);
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IPC::ResponseBuilder rb{ctx, 3};
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rb.Push(ResultSuccess);
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rb.Push<u32>(impl->GetSharedFontRegion(font_id).offset);
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}
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void IPlatformServiceManager::GetSharedMemoryNativeHandle(HLERequestContext& ctx) {
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// Map backing memory for the font data
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LOG_DEBUG(Service_NS, "called");
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// Create shared font memory object
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std::memcpy(kernel.GetFontSharedMem().GetPointer(), impl->shared_font->data(),
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impl->shared_font->size());
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IPC::ResponseBuilder rb{ctx, 2, 1};
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rb.Push(ResultSuccess);
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rb.PushCopyObjects(&kernel.GetFontSharedMem());
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}
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void IPlatformServiceManager::GetSharedFontInOrderOfPriority(HLERequestContext& ctx) {
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IPC::RequestParser rp{ctx};
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const u64 language_code{rp.Pop<u64>()}; // TODO(ogniK): Find out what this is used for
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LOG_DEBUG(Service_NS, "called, language_code={:X}", language_code);
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IPC::ResponseBuilder rb{ctx, 4};
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std::vector<u32> font_codes;
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std::vector<u32> font_offsets;
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std::vector<u32> font_sizes;
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// TODO(ogniK): Have actual priority order
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for (std::size_t i = 0; i < impl->shared_font_regions.size(); i++) {
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font_codes.push_back(static_cast<u32>(i));
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auto region = impl->GetSharedFontRegion(i);
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font_offsets.push_back(region.offset);
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font_sizes.push_back(region.size);
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}
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// Resize buffers if game requests smaller size output
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font_codes.resize(std::min(font_codes.size(), ctx.GetWriteBufferNumElements<u32>(0)));
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font_offsets.resize(std::min(font_offsets.size(), ctx.GetWriteBufferNumElements<u32>(1)));
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font_sizes.resize(std::min(font_sizes.size(), ctx.GetWriteBufferNumElements<u32>(2)));
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ctx.WriteBuffer(font_codes, 0);
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ctx.WriteBuffer(font_offsets, 1);
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ctx.WriteBuffer(font_sizes, 2);
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rb.Push(ResultSuccess);
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rb.Push<u8>(static_cast<u8>(LoadState::Done)); // Fonts Loaded
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rb.Push<u32>(static_cast<u32>(font_codes.size()));
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}
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} // namespace Service::NS
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