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Atmosphere/stratosphere/fs_mitm/source/fsmitm_utils.cpp

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/*
* Copyright (c) 2018 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/>.
*/
#include <switch.h>
#include <stratosphere.hpp>
#include <atomic>
#include <algorithm>
#include <strings.h>
#include "sm_mitm.h"
#include "debug.hpp"
#include "fsmitm_utils.hpp"
#include "ini.h"
static FsFileSystem g_sd_filesystem = {0};
static std::vector<u64> g_mitm_flagged_tids;
static std::vector<u64> g_disable_mitm_flagged_tids;
static std::atomic_bool g_has_initialized = false;
static std::atomic_bool g_has_hid_session = false;
static u64 g_override_key_combination = KEY_R;
static bool g_override_by_default = true;
/* Static buffer for loader.ini contents at runtime. */
static char g_config_ini_data[0x800];
static bool IsHexadecimal(const char *str) {
while (*str) {
if (isxdigit(*str)) {
str++;
} else {
return false;
}
}
return true;
}
void Utils::InitializeSdThreadFunc(void *args) {
/* Get required services. */
Handle tmp_hnd = 0;
static const char * const required_active_services[] = {"pcv", "gpio", "pinmux", "psc:c"};
for (unsigned int i = 0; i < sizeof(required_active_services) / sizeof(required_active_services[0]); i++) {
if (R_FAILED(smGetServiceOriginal(&tmp_hnd, smEncodeName(required_active_services[i])))) {
/* TODO: Panic */
} else {
svcCloseHandle(tmp_hnd);
}
}
/* Mount SD. */
while (R_FAILED(fsMountSdcard(&g_sd_filesystem))) {
svcSleepThread(1000ULL);
}
/* Check for MitM flags. */
FsDir titles_dir;
if (R_SUCCEEDED(fsFsOpenDirectory(&g_sd_filesystem, "/atmosphere/titles", FS_DIROPEN_DIRECTORY, &titles_dir))) {
FsDirectoryEntry dir_entry;
FsFile f;
u64 read_entries;
while (R_SUCCEEDED((fsDirRead(&titles_dir, 0, &read_entries, 1, &dir_entry))) && read_entries == 1) {
if (strlen(dir_entry.name) == 0x10 && IsHexadecimal(dir_entry.name)) {
u64 title_id = strtoul(dir_entry.name, NULL, 16);
char title_path[FS_MAX_PATH] = {0};
strcpy(title_path, "/atmosphere/titles/");
strcat(title_path, dir_entry.name);
strcat(title_path, "/fsmitm.flag");
if (R_SUCCEEDED(fsFsOpenFile(&g_sd_filesystem, title_path, FS_OPEN_READ, &f))) {
g_mitm_flagged_tids.push_back(title_id);
fsFileClose(&f);
}
memset(title_path, 0, sizeof(title_path));
strcpy(title_path, "/atmosphere/titles/");
strcat(title_path, dir_entry.name);
strcat(title_path, "/fsmitm_disable.flag");
if (R_SUCCEEDED(fsFsOpenFile(&g_sd_filesystem, title_path, FS_OPEN_READ, &f))) {
g_disable_mitm_flagged_tids.push_back(title_id);
fsFileClose(&f);
}
}
}
fsDirClose(&titles_dir);
}
Utils::RefreshConfiguration();
g_has_initialized = true;
svcExitThread();
}
void Utils::InitializeHidThreadFunc(void *args) {
while (R_FAILED(hidInitialize())) {
svcSleepThread(1000ULL);
}
g_has_hid_session = true;
svcExitThread();
}
bool Utils::IsSdInitialized() {
return g_has_initialized;
}
bool Utils::IsHidInitialized() {
return g_has_hid_session;
}
Result Utils::OpenSdFile(const char *fn, int flags, FsFile *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
return fsFsOpenFile(&g_sd_filesystem, fn, flags, out);
}
Result Utils::OpenSdFileForAtmosphere(u64 title_id, const char *fn, int flags, FsFile *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
char path[FS_MAX_PATH];
if (*fn == '/') {
snprintf(path, sizeof(path), "/atmosphere/titles/%016lx%s", title_id, fn);
} else {
snprintf(path, sizeof(path), "/atmosphere/titles/%016lx/%s", title_id, fn);
}
return fsFsOpenFile(&g_sd_filesystem, path, flags, out);
}
Result Utils::OpenRomFSSdFile(u64 title_id, const char *fn, int flags, FsFile *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
return OpenRomFSFile(&g_sd_filesystem, title_id, fn, flags, out);
}
Result Utils::OpenSdDir(const char *path, FsDir *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
return fsFsOpenDirectory(&g_sd_filesystem, path, FS_DIROPEN_DIRECTORY | FS_DIROPEN_FILE, out);
}
Result Utils::OpenSdDirForAtmosphere(u64 title_id, const char *path, FsDir *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
char safe_path[FS_MAX_PATH];
if (*path == '/') {
snprintf(safe_path, sizeof(safe_path), "/atmosphere/titles/%016lx%s", title_id, path);
} else {
snprintf(safe_path, sizeof(safe_path), "/atmosphere/titles/%016lx/%s", title_id, path);
}
return fsFsOpenDirectory(&g_sd_filesystem, safe_path, FS_DIROPEN_DIRECTORY | FS_DIROPEN_FILE, out);
}
Result Utils::OpenRomFSSdDir(u64 title_id, const char *path, FsDir *out) {
if (!IsSdInitialized()) {
return 0xFA202;
}
return OpenRomFSDir(&g_sd_filesystem, title_id, path, out);
}
Result Utils::OpenRomFSFile(FsFileSystem *fs, u64 title_id, const char *fn, int flags, FsFile *out) {
char path[FS_MAX_PATH];
if (*fn == '/') {
snprintf(path, sizeof(path), "/atmosphere/titles/%016lx/romfs%s", title_id, fn);
} else {
snprintf(path, sizeof(path), "/atmosphere/titles/%016lx/romfs/%s", title_id, fn);
}
return fsFsOpenFile(fs, path, flags, out);
}
Result Utils::OpenRomFSDir(FsFileSystem *fs, u64 title_id, const char *path, FsDir *out) {
char safe_path[FS_MAX_PATH];
if (*path == '/') {
snprintf(safe_path, sizeof(safe_path), "/atmosphere/titles/%016lx/romfs%s", title_id, path);
} else {
snprintf(safe_path, sizeof(safe_path), "/atmosphere/titles/%016lx/romfs/%s", title_id, path);
}
return fsFsOpenDirectory(fs, safe_path, FS_DIROPEN_DIRECTORY | FS_DIROPEN_FILE, out);
}
Result Utils::HasSdRomfsContent(u64 title_id, bool *out) {
Result rc;
FsDir dir;
if (R_FAILED((rc = Utils::OpenRomFSSdDir(title_id, "", &dir)))) {
return rc;
}
FsDirectoryEntry dir_entry;
u64 read_entries;
if (R_SUCCEEDED((rc = fsDirRead(&dir, 0, &read_entries, 1, &dir_entry)))) {
*out = (read_entries == 1);
}
fsDirClose(&dir);
return rc;
}
bool Utils::HasSdMitMFlag(u64 tid) {
if (IsSdInitialized()) {
return std::find(g_mitm_flagged_tids.begin(), g_mitm_flagged_tids.end(), tid) != g_mitm_flagged_tids.end();
}
return false;
}
bool Utils::HasSdDisableMitMFlag(u64 tid) {
if (IsSdInitialized()) {
return std::find(g_disable_mitm_flagged_tids.begin(), g_disable_mitm_flagged_tids.end(), tid) != g_disable_mitm_flagged_tids.end();
}
return false;
}
Result Utils::GetKeysDown(u64 *keys) {
if (!Utils::IsHidInitialized()) {
return MAKERESULT(Module_Libnx, LibnxError_InitFail_HID);
}
hidScanInput();
*keys = hidKeysDown(CONTROLLER_P1_AUTO);
return 0x0;
}
bool Utils::HasOverrideButton(u64 tid) {
if (tid < 0x0100000000010000ULL || !IsSdInitialized()) {
/* Disable button override disable for non-applications. */
return true;
}
/* Unconditionally refresh loader.ini contents. */
RefreshConfiguration();
u64 kDown = 0;
bool keys_triggered = (R_SUCCEEDED(GetKeysDown(&kDown)) && ((kDown & g_override_key_combination) != 0));
return IsSdInitialized() && (g_override_by_default ^ keys_triggered);
}
static int FsMitMIniHandler(void *user, const char *section, const char *name, const char *value) {
/* Taken and modified, with love, from Rajkosto's implementation. */
if (strcasecmp(section, "config") == 0) {
if (strcasecmp(name, "override_key") == 0) {
if (value[0] == '!') {
g_override_by_default = true;
value++;
} else {
g_override_by_default = false;
}
if (strcasecmp(value, "A") == 0) {
g_override_key_combination = KEY_A;
} else if (strcasecmp(value, "B") == 0) {
g_override_key_combination = KEY_B;
} else if (strcasecmp(value, "X") == 0) {
g_override_key_combination = KEY_X;
} else if (strcasecmp(value, "Y") == 0) {
g_override_key_combination = KEY_Y;
} else if (strcasecmp(value, "LS") == 0) {
g_override_key_combination = KEY_LSTICK;
} else if (strcasecmp(value, "RS") == 0) {
g_override_key_combination = KEY_RSTICK;
} else if (strcasecmp(value, "L") == 0) {
g_override_key_combination = KEY_L;
} else if (strcasecmp(value, "R") == 0) {
g_override_key_combination = KEY_R;
} else if (strcasecmp(value, "ZL") == 0) {
g_override_key_combination = KEY_ZL;
} else if (strcasecmp(value, "ZR") == 0) {
g_override_key_combination = KEY_ZR;
} else if (strcasecmp(value, "PLUS") == 0) {
g_override_key_combination = KEY_PLUS;
} else if (strcasecmp(value, "MINUS") == 0) {
g_override_key_combination = KEY_MINUS;
} else if (strcasecmp(value, "DLEFT") == 0) {
g_override_key_combination = KEY_DLEFT;
} else if (strcasecmp(value, "DUP") == 0) {
g_override_key_combination = KEY_DUP;
} else if (strcasecmp(value, "DRIGHT") == 0) {
g_override_key_combination = KEY_DRIGHT;
} else if (strcasecmp(value, "DDOWN") == 0) {
g_override_key_combination = KEY_DDOWN;
} else if (strcasecmp(value, "SL") == 0) {
g_override_key_combination = KEY_SL;
} else if (strcasecmp(value, "SR") == 0) {
g_override_key_combination = KEY_SR;
} else {
g_override_key_combination = 0;
}
}
} else {
return 0;
}
return 1;
}
void Utils::RefreshConfiguration() {
FsFile config_file;
if (R_FAILED(fsFsOpenFile(&g_sd_filesystem, "/atmosphere/loader.ini", FS_OPEN_READ, &config_file))) {
return;
}
u64 size;
if (R_FAILED(fsFileGetSize(&config_file, &size))) {
return;
}
size = std::min(size, (decltype(size))0x7FF);
/* Read in string. */
std::fill(g_config_ini_data, g_config_ini_data + 0x800, 0);
size_t r_s;
fsFileRead(&config_file, 0, g_config_ini_data, size, &r_s);
fsFileClose(&config_file);
ini_parse_string(g_config_ini_data, FsMitMIniHandler, NULL);
}
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