mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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250 lines
12 KiB
C++
250 lines
12 KiB
C++
/*
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* Copyright (c) 2018-2019 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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#include <stratosphere.hpp>
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#include "amsmitm_initialization.hpp"
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#include "amsmitm_fs_utils.hpp"
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#include "bpc_mitm/bpc_ams_power_utils.hpp"
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namespace ams::mitm {
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namespace {
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/* BIS key sources. */
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constexpr u8 BisKeySources[4][2][0x10] = {
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{
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{0xF8, 0x3F, 0x38, 0x6E, 0x2C, 0xD2, 0xCA, 0x32, 0xA8, 0x9A, 0xB9, 0xAA, 0x29, 0xBF, 0xC7, 0x48},
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{0x7D, 0x92, 0xB0, 0x3A, 0xA8, 0xBF, 0xDE, 0xE1, 0xA7, 0x4C, 0x3B, 0x6E, 0x35, 0xCB, 0x71, 0x06}
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},
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{
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{0x41, 0x00, 0x30, 0x49, 0xDD, 0xCC, 0xC0, 0x65, 0x64, 0x7A, 0x7E, 0xB4, 0x1E, 0xED, 0x9C, 0x5F},
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{0x44, 0x42, 0x4E, 0xDA, 0xB4, 0x9D, 0xFC, 0xD9, 0x87, 0x77, 0x24, 0x9A, 0xDC, 0x9F, 0x7C, 0xA4}
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},
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{
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{0x52, 0xC2, 0xE9, 0xEB, 0x09, 0xE3, 0xEE, 0x29, 0x32, 0xA1, 0x0C, 0x1F, 0xB6, 0xA0, 0x92, 0x6C},
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{0x4D, 0x12, 0xE1, 0x4B, 0x2A, 0x47, 0x4C, 0x1C, 0x09, 0xCB, 0x03, 0x59, 0xF0, 0x15, 0xF4, 0xE4}
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},
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{
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{0x52, 0xC2, 0xE9, 0xEB, 0x09, 0xE3, 0xEE, 0x29, 0x32, 0xA1, 0x0C, 0x1F, 0xB6, 0xA0, 0x92, 0x6C},
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{0x4D, 0x12, 0xE1, 0x4B, 0x2A, 0x47, 0x4C, 0x1C, 0x09, 0xCB, 0x03, 0x59, 0xF0, 0x15, 0xF4, 0xE4}
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}
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};
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constexpr u8 BisKekSource[0x10] = {
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0x34, 0xC1, 0xA0, 0xC4, 0x82, 0x58, 0xF8, 0xB4, 0xFA, 0x9E, 0x5E, 0x6A, 0xDA, 0xFC, 0x7E, 0x4F,
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};
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void InitializeThreadFunc(void *arg);
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constexpr size_t InitializeThreadStackSize = 0x4000;
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constexpr int InitializeThreadPriority = 0x15;
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os::StaticThread<InitializeThreadStackSize> g_initialize_thread(&InitializeThreadFunc, nullptr, InitializeThreadPriority);
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/* Globals. */
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os::Event g_init_event(false);
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/* Console-unique data backup and protection. */
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constexpr size_t CalibrationBinarySize = 0x8000;
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u8 g_calibration_binary_storage_backup[CalibrationBinarySize];
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u8 g_calibration_binary_file_backup[CalibrationBinarySize];
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FsFile g_calibration_binary_file;
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FsFile g_bis_key_file;
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/* Emummc file protection. */
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FsFile g_emummc_file;
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constexpr inline bool IsHexadecimal(const char *str) {
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while (*str) {
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if (std::isxdigit(static_cast<unsigned char>(*str))) {
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str++;
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} else {
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return false;
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}
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}
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return true;
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}
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void GetBackupFileName(char *dst, size_t dst_size, const char *serial_number, const char *fn) {
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if (strlen(serial_number) > 0) {
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std::snprintf(dst, dst_size, "automatic_backups/%s_%s", serial_number, fn);
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} else {
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std::snprintf(dst, dst_size, "automatic_backups/%s", fn);
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}
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}
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void CreateAutomaticBackups() {
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/* Create a backup directory, if one doesn't exist. */
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mitm::fs::CreateAtmosphereSdDirectory("/automatic_backups");
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/* Read the calibration binary. */
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{
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FsStorage calibration_binary_storage;
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R_ASSERT(fsOpenBisStorage(&calibration_binary_storage, FsBisPartitionId_CalibrationBinary));
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ON_SCOPE_EXIT { fsStorageClose(&calibration_binary_storage); };
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R_ASSERT(fsStorageRead(&calibration_binary_storage, 0, g_calibration_binary_storage_backup, CalibrationBinarySize));
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}
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/* Copy serial number from partition. */
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/* TODO: Define the magic numbers? Structs? */
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char serial_number[0x40] = {};
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std::memcpy(serial_number, g_calibration_binary_storage_backup + 0x250, 0x18);
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/* Backup the calibration binary. */
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{
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char calibration_binary_backup_name[ams::fs::EntryNameLengthMax + 1];
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GetBackupFileName(calibration_binary_backup_name, sizeof(calibration_binary_backup_name), serial_number, "PRODINFO.bin");
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mitm::fs::CreateAtmosphereSdFile(calibration_binary_backup_name, CalibrationBinarySize, ams::fs::CreateOption_None);
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R_ASSERT(mitm::fs::OpenAtmosphereSdFile(&g_calibration_binary_file, calibration_binary_backup_name, ams::fs::OpenMode_ReadWrite));
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s64 file_size = 0;
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R_ASSERT(fsFileGetSize(&g_calibration_binary_file, &file_size));
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bool is_file_backup_valid = file_size == CalibrationBinarySize;
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if (is_file_backup_valid) {
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u64 read_size = 0;
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R_ASSERT(fsFileRead(&g_calibration_binary_file, 0, g_calibration_binary_file_backup, CalibrationBinarySize, FsReadOption_None, &read_size));
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AMS_ASSERT(read_size == CalibrationBinarySize);
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is_file_backup_valid &= std::memcmp(g_calibration_binary_file_backup, "CAL0", 4) == 0;
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is_file_backup_valid &= std::memcmp(g_calibration_binary_file_backup + 0x250, serial_number, 0x18) == 0;
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const u32 cal_bin_size = *reinterpret_cast<const u32 *>(g_calibration_binary_file_backup + 0x8);
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is_file_backup_valid &= cal_bin_size + 0x40 <= CalibrationBinarySize;
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if (is_file_backup_valid) {
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u8 calc_hash[SHA256_HASH_SIZE];
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/* TODO: ams::crypto? */
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sha256CalculateHash(calc_hash, g_calibration_binary_file_backup + 0x40, cal_bin_size);
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is_file_backup_valid &= std::memcmp(calc_hash, g_calibration_binary_file_backup + 0x20, sizeof(calc_hash)) == 0;
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}
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}
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if (!is_file_backup_valid) {
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R_ASSERT(fsFileSetSize(&g_calibration_binary_file, CalibrationBinarySize));
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R_ASSERT(fsFileWrite(&g_calibration_binary_file, 0, g_calibration_binary_storage_backup, CalibrationBinarySize, FsWriteOption_Flush));
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}
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/* Note: g_calibration_binary_file is intentionally not closed here. This prevents any other process from opening it. */
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std::memset(g_calibration_binary_file_backup, 0, CalibrationBinarySize);
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std::memset(g_calibration_binary_storage_backup, 0, CalibrationBinarySize);
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}
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/* Backup BIS keys. */
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{
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u64 key_generation = 0;
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if (hos::GetVersion() >= hos::Version_500) {
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R_ASSERT(splGetConfig(SplConfigItem_NewKeyGeneration, &key_generation));
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}
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u8 bis_keys[4][2][0x10];
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std::memset(bis_keys, 0xCC, sizeof(bis_keys));
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/* TODO: Clean this up. */
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for (size_t partition = 0; partition < 4; partition++) {
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if (partition == 0) {
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for (size_t i = 0; i < 2; i++) {
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R_ASSERT(splFsGenerateSpecificAesKey(BisKeySources[partition][i], key_generation, i, bis_keys[partition][i]));
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}
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} else {
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const u32 option = (partition == 3 && spl::IsRecoveryBoot()) ? 0x4 : 0x1;
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u8 access_key[0x10];
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R_ASSERT(splCryptoGenerateAesKek(BisKekSource, key_generation, option, access_key));
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for (size_t i = 0; i < 2; i++) {
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R_ASSERT(splCryptoGenerateAesKey(access_key, BisKeySources[partition][i], bis_keys[partition][i]));
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}
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}
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}
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char bis_keys_backup_name[ams::fs::EntryNameLengthMax + 1];
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GetBackupFileName(bis_keys_backup_name, sizeof(bis_keys_backup_name), serial_number, "BISKEYS.bin");
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mitm::fs::CreateAtmosphereSdFile(bis_keys_backup_name, sizeof(bis_keys), ams::fs::CreateOption_None);
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R_ASSERT(mitm::fs::OpenAtmosphereSdFile(&g_bis_key_file, bis_keys_backup_name, ams::fs::OpenMode_ReadWrite));
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R_ASSERT(fsFileSetSize(&g_bis_key_file, sizeof(bis_keys)));
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R_ASSERT(fsFileWrite(&g_bis_key_file, 0, bis_keys, sizeof(bis_keys), FsWriteOption_Flush));
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/* NOTE: g_bis_key_file is intentionally not closed here. This prevents any other process from opening it. */
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}
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}
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void RenameTitlesDirectoryProgramFoldersForCompatibility() {
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FsDir titles_dir;
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if (R_FAILED(mitm::fs::OpenAtmosphereSdDirectory(&titles_dir, "/titles", ams::fs::OpenDirectoryMode_Directory))) {
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return;
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}
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ON_SCOPE_EXIT { fsDirClose(&titles_dir); };
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ams::fs::DirectoryEntry dir_entry;
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s64 read_entries;
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while (R_SUCCEEDED(fsDirRead(&titles_dir, &read_entries, 1, &dir_entry)) && read_entries == 1) {
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if (strlen(dir_entry.name) == 2 * sizeof(ncm::ProgramId) && IsHexadecimal(dir_entry.name)) {
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/* We found a program directory, try to rename it. Failure is allowed. */
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mitm::fs::RenameProgramDirectoryForCompatibility(dir_entry.name);
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}
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}
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}
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/* Initialization implementation */
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void InitializeThreadFunc(void *arg) {
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/* Wait for the SD card to be ready. */
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cfg::WaitSdCardInitialized();
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/* Open global SD card file system, so that other threads can begin using the SD. */
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mitm::fs::OpenGlobalSdCardFileSystem();
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/* Initialize the reboot manager (load a payload off the SD). */
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/* Discard result, since it doesn't need to succeed. */
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mitm::bpc::LoadRebootPayload();
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/* Backup Calibration Binary and BIS keys. */
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CreateAutomaticBackups();
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/* Rename program folders in the titles directory. */
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/* TODO: Remove this in Atmosphere 0.10.2. */
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RenameTitlesDirectoryProgramFoldersForCompatibility();
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/* If we're emummc, persist a write-handle to prevent other processes from touching the image. */
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if (emummc::IsActive()) {
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if (const char *emummc_file_path = emummc::GetFilePath(); emummc_file_path != nullptr) {
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char emummc_path[ams::fs::EntryNameLengthMax + 1];
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std::snprintf(emummc_path, sizeof(emummc_path), "%s/eMMC", emummc_file_path);
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mitm::fs::OpenSdFile(&g_emummc_file, emummc_path, ams::fs::OpenMode_Read);
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}
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}
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/* Connect to set:sys. */
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sm::DoWithSession([]() {
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R_ASSERT(setsysInitialize());
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});
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/* Signal to waiters that we are ready. */
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g_init_event.Signal();
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}
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}
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void StartInitialize() {
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R_ASSERT(g_initialize_thread.Start());
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}
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bool IsInitialized() {
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return g_init_event.TryWait();
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}
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void WaitInitialized() {
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g_init_event.Wait();
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}
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}
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