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unleashed-firmware/applications/system/js_app/modules/js_badusb.c
MX b299604932
js fix badusb double free crash with quit() 
by Willy-JL
2024-04-12 20:02:38 +03:00

528 lines
17 KiB
C
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#include <core/common_defines.h>
#include "../js_modules.h"
#include <furi_hal.h>
#define ASCII_TO_KEY(layout, x) (((uint8_t)x < 128) ? (layout[(uint8_t)x]) : HID_KEYBOARD_NONE)
typedef struct {
FuriHalUsbHidConfig* hid_cfg;
uint16_t layout[128];
FuriHalUsbInterface* usb_if_prev;
uint8_t key_hold_cnt;
} JsBadusbInst;
static const struct {
char* name;
uint16_t code;
} key_codes[] = {
{"CTRL", KEY_MOD_LEFT_CTRL},
{"SHIFT", KEY_MOD_LEFT_SHIFT},
{"ALT", KEY_MOD_LEFT_ALT},
{"GUI", KEY_MOD_LEFT_GUI},
{"DOWN", HID_KEYBOARD_DOWN_ARROW},
{"LEFT", HID_KEYBOARD_LEFT_ARROW},
{"RIGHT", HID_KEYBOARD_RIGHT_ARROW},
{"UP", HID_KEYBOARD_UP_ARROW},
{"ENTER", HID_KEYBOARD_RETURN},
{"PAUSE", HID_KEYBOARD_PAUSE},
{"CAPSLOCK", HID_KEYBOARD_CAPS_LOCK},
{"DELETE", HID_KEYBOARD_DELETE_FORWARD},
{"BACKSPACE", HID_KEYBOARD_DELETE},
{"END", HID_KEYBOARD_END},
{"ESC", HID_KEYBOARD_ESCAPE},
{"HOME", HID_KEYBOARD_HOME},
{"INSERT", HID_KEYBOARD_INSERT},
{"NUMLOCK", HID_KEYPAD_NUMLOCK},
{"PAGEUP", HID_KEYBOARD_PAGE_UP},
{"PAGEDOWN", HID_KEYBOARD_PAGE_DOWN},
{"PRINTSCREEN", HID_KEYBOARD_PRINT_SCREEN},
{"SCROLLLOCK", HID_KEYBOARD_SCROLL_LOCK},
{"SPACE", HID_KEYBOARD_SPACEBAR},
{"TAB", HID_KEYBOARD_TAB},
{"MENU", HID_KEYBOARD_APPLICATION},
{"F1", HID_KEYBOARD_F1},
{"F2", HID_KEYBOARD_F2},
{"F3", HID_KEYBOARD_F3},
{"F4", HID_KEYBOARD_F4},
{"F5", HID_KEYBOARD_F5},
{"F6", HID_KEYBOARD_F6},
{"F7", HID_KEYBOARD_F7},
{"F8", HID_KEYBOARD_F8},
{"F9", HID_KEYBOARD_F9},
{"F10", HID_KEYBOARD_F10},
{"F11", HID_KEYBOARD_F11},
{"F12", HID_KEYBOARD_F12},
{"F13", HID_KEYBOARD_F13},
{"F14", HID_KEYBOARD_F14},
{"F15", HID_KEYBOARD_F15},
{"F16", HID_KEYBOARD_F16},
{"F17", HID_KEYBOARD_F17},
{"F18", HID_KEYBOARD_F18},
{"F19", HID_KEYBOARD_F19},
{"F20", HID_KEYBOARD_F20},
{"F21", HID_KEYBOARD_F21},
{"F22", HID_KEYBOARD_F22},
{"F23", HID_KEYBOARD_F23},
{"F24", HID_KEYBOARD_F24},
{"NUM0", HID_KEYPAD_0},
{"NUM1", HID_KEYPAD_1},
{"NUM2", HID_KEYPAD_2},
{"NUM3", HID_KEYPAD_3},
{"NUM4", HID_KEYPAD_4},
{"NUM5", HID_KEYPAD_5},
{"NUM6", HID_KEYPAD_6},
{"NUM7", HID_KEYPAD_7},
{"NUM8", HID_KEYPAD_8},
{"NUM9", HID_KEYPAD_9},
};
static void js_badusb_quit_free(JsBadusbInst* badusb) {
if(badusb->usb_if_prev) {
furi_hal_hid_kb_release_all();
furi_check(furi_hal_usb_set_config(badusb->usb_if_prev, NULL));
badusb->usb_if_prev = NULL;
}
if(badusb->hid_cfg) {
free(badusb->hid_cfg);
badusb->hid_cfg = NULL;
}
}
static bool setup_parse_params(
JsBadusbInst* badusb,
struct mjs* mjs,
mjs_val_t arg,
FuriHalUsbHidConfig* hid_cfg) {
if(!mjs_is_object(arg)) {
return false;
}
mjs_val_t vid_obj = mjs_get(mjs, arg, "vid", ~0);
mjs_val_t pid_obj = mjs_get(mjs, arg, "pid", ~0);
mjs_val_t mfr_obj = mjs_get(mjs, arg, "mfr_name", ~0);
mjs_val_t prod_obj = mjs_get(mjs, arg, "prod_name", ~0);
mjs_val_t layout_obj = mjs_get(mjs, arg, "layout_path", ~0);
if(mjs_is_number(vid_obj) && mjs_is_number(pid_obj)) {
hid_cfg->vid = mjs_get_int32(mjs, vid_obj);
hid_cfg->pid = mjs_get_int32(mjs, pid_obj);
} else {
return false;
}
if(mjs_is_string(mfr_obj)) {
size_t str_len = 0;
const char* str_temp = mjs_get_string(mjs, &mfr_obj, &str_len);
if((str_len == 0) || (str_temp == NULL)) {
return false;
}
strlcpy(hid_cfg->manuf, str_temp, sizeof(hid_cfg->manuf));
}
if(mjs_is_string(prod_obj)) {
size_t str_len = 0;
const char* str_temp = mjs_get_string(mjs, &prod_obj, &str_len);
if((str_len == 0) || (str_temp == NULL)) {
return false;
}
strlcpy(hid_cfg->product, str_temp, sizeof(hid_cfg->product));
}
if(mjs_is_string(layout_obj)) {
size_t str_len = 0;
const char* str_temp = mjs_get_string(mjs, &layout_obj, &str_len);
if((str_len == 0) || (str_temp == NULL)) {
return false;
}
File* file = storage_file_alloc(furi_record_open(RECORD_STORAGE));
bool layout_loaded = storage_file_open(file, str_temp, FSAM_READ, FSOM_OPEN_EXISTING) &&
storage_file_read(file, badusb->layout, sizeof(badusb->layout)) ==
sizeof(badusb->layout);
storage_file_free(file);
furi_record_close(RECORD_STORAGE);
if(!layout_loaded) {
return false;
}
} else {
memcpy(badusb->layout, hid_asciimap, MIN(sizeof(hid_asciimap), sizeof(badusb->layout)));
}
return true;
}
static void js_badusb_setup(struct mjs* mjs) {
mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
JsBadusbInst* badusb = mjs_get_ptr(mjs, obj_inst);
furi_assert(badusb);
if(badusb->usb_if_prev) {
mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "HID is already started");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
bool args_correct = false;
size_t num_args = mjs_nargs(mjs);
if(num_args == 0) {
// No arguments: start USB HID with default settings
args_correct = true;
} else if(num_args == 1) {
badusb->hid_cfg = malloc(sizeof(FuriHalUsbHidConfig));
// Parse argument object
args_correct = setup_parse_params(badusb, mjs, mjs_arg(mjs, 0), badusb->hid_cfg);
}
if(!args_correct) {
mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
badusb->usb_if_prev = furi_hal_usb_get_config();
furi_hal_usb_unlock();
furi_hal_usb_set_config(&usb_hid, badusb->hid_cfg);
mjs_return(mjs, MJS_UNDEFINED);
}
static void js_badusb_quit(struct mjs* mjs) {
mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
JsBadusbInst* badusb = mjs_get_ptr(mjs, obj_inst);
furi_assert(badusb);
if(badusb->usb_if_prev == NULL) {
mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "HID is not started");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
js_badusb_quit_free(badusb);
mjs_return(mjs, MJS_UNDEFINED);
}
static void js_badusb_is_connected(struct mjs* mjs) {
mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
JsBadusbInst* badusb = mjs_get_ptr(mjs, obj_inst);
furi_assert(badusb);
if(badusb->usb_if_prev == NULL) {
mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "HID is not started");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
bool is_connected = furi_hal_hid_is_connected();
mjs_return(mjs, mjs_mk_boolean(mjs, is_connected));
}
uint16_t get_keycode_by_name(JsBadusbInst* badusb, const char* key_name, size_t name_len) {
if(name_len == 1) { // Single char
return (ASCII_TO_KEY(badusb->layout, key_name[0]));
}
for(size_t i = 0; i < COUNT_OF(key_codes); i++) {
size_t key_cmd_len = strlen(key_codes[i].name);
if(key_cmd_len != name_len) {
continue;
}
if(strncmp(key_name, key_codes[i].name, name_len) == 0) {
return key_codes[i].code;
}
}
return HID_KEYBOARD_NONE;
}
static bool parse_keycode(JsBadusbInst* badusb, struct mjs* mjs, size_t nargs, uint16_t* keycode) {
uint16_t key_tmp = 0;
for(size_t i = 0; i < nargs; i++) {
mjs_val_t arg = mjs_arg(mjs, i);
if(mjs_is_string(arg)) {
size_t name_len = 0;
const char* key_name = mjs_get_string(mjs, &arg, &name_len);
if((key_name == NULL) || (name_len == 0)) {
// String error
return false;
}
uint16_t str_key = get_keycode_by_name(badusb, key_name, name_len);
if(str_key == HID_KEYBOARD_NONE) {
// Unknown key code
return false;
}
if((str_key & 0xFF) && (key_tmp & 0xFF)) {
// Main key is already defined
return false;
}
key_tmp |= str_key;
} else if(mjs_is_number(arg)) {
uint32_t keycode_number = (uint32_t)mjs_get_int32(mjs, arg);
if(((key_tmp & 0xFF) != 0) || (keycode_number > 0xFF)) {
return false;
}
key_tmp |= keycode_number & 0xFF;
} else {
return false;
}
}
*keycode = key_tmp;
return true;
}
static void js_badusb_press(struct mjs* mjs) {
mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
JsBadusbInst* badusb = mjs_get_ptr(mjs, obj_inst);
furi_assert(badusb);
if(badusb->usb_if_prev == NULL) {
mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "HID is not started");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
bool args_correct = false;
uint16_t keycode = HID_KEYBOARD_NONE;
size_t num_args = mjs_nargs(mjs);
if(num_args > 0) {
args_correct = parse_keycode(badusb, mjs, num_args, &keycode);
}
if(!args_correct) {
mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
furi_hal_hid_kb_press(keycode);
furi_hal_hid_kb_release(keycode);
mjs_return(mjs, MJS_UNDEFINED);
}
static void js_badusb_hold(struct mjs* mjs) {
mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
JsBadusbInst* badusb = mjs_get_ptr(mjs, obj_inst);
furi_assert(badusb);
if(badusb->usb_if_prev == NULL) {
mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "HID is not started");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
bool args_correct = false;
uint16_t keycode = HID_KEYBOARD_NONE;
size_t num_args = mjs_nargs(mjs);
if(num_args > 0) {
args_correct = parse_keycode(badusb, mjs, num_args, &keycode);
}
if(!args_correct) {
mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
if(keycode & 0xFF) {
badusb->key_hold_cnt++;
if(badusb->key_hold_cnt > (HID_KB_MAX_KEYS - 1)) {
mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Too many keys are hold");
furi_hal_hid_kb_release_all();
mjs_return(mjs, MJS_UNDEFINED);
return;
}
}
furi_hal_hid_kb_press(keycode);
mjs_return(mjs, MJS_UNDEFINED);
}
static void js_badusb_release(struct mjs* mjs) {
mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
JsBadusbInst* badusb = mjs_get_ptr(mjs, obj_inst);
furi_assert(badusb);
if(badusb->usb_if_prev == NULL) {
mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "HID is not started");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
bool args_correct = false;
uint16_t keycode = HID_KEYBOARD_NONE;
size_t num_args = mjs_nargs(mjs);
if(num_args == 0) {
furi_hal_hid_kb_release_all();
badusb->key_hold_cnt = 0;
mjs_return(mjs, MJS_UNDEFINED);
return;
} else {
args_correct = parse_keycode(badusb, mjs, num_args, &keycode);
}
if(!args_correct) {
mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
if((keycode & 0xFF) && (badusb->key_hold_cnt > 0)) {
badusb->key_hold_cnt--;
}
furi_hal_hid_kb_release(keycode);
mjs_return(mjs, MJS_UNDEFINED);
}
// Make sure NUMLOCK is enabled for altchar
static void ducky_numlock_on() {
if((furi_hal_hid_get_led_state() & HID_KB_LED_NUM) == 0) {
furi_hal_hid_kb_press(HID_KEYBOARD_LOCK_NUM_LOCK);
furi_hal_hid_kb_release(HID_KEYBOARD_LOCK_NUM_LOCK);
}
}
// Simulate pressing a character using ALT+Numpad ASCII code
static void ducky_altchar(JsBadusbInst* badusb, const char* ascii_code) {
// Hold the ALT key
furi_hal_hid_kb_press(KEY_MOD_LEFT_ALT);
// Press the corresponding numpad key for each digit of the ASCII code
for(size_t i = 0; ascii_code[i] != '\0'; i++) {
char digitChar[5] = {'N', 'U', 'M', ascii_code[i], '\0'}; // Construct the numpad key name
uint16_t numpad_keycode = get_keycode_by_name(badusb, digitChar, strlen(digitChar));
if(numpad_keycode == HID_KEYBOARD_NONE) {
continue; // Skip if keycode not found
}
furi_hal_hid_kb_press(numpad_keycode);
furi_hal_hid_kb_release(numpad_keycode);
}
// Release the ALT key
furi_hal_hid_kb_release(KEY_MOD_LEFT_ALT);
}
static void badusb_print(struct mjs* mjs, bool ln, bool alt) {
mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
JsBadusbInst* badusb = mjs_get_ptr(mjs, obj_inst);
furi_assert(badusb);
if(badusb->usb_if_prev == NULL) {
mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "HID is not started");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
bool args_correct = false;
const char* text_str = NULL;
size_t text_len = 0;
uint32_t delay_val = 0;
do {
mjs_val_t obj_string = MJS_UNDEFINED;
size_t num_args = mjs_nargs(mjs);
if(num_args == 1) {
obj_string = mjs_arg(mjs, 0);
} else if(num_args == 2) {
obj_string = mjs_arg(mjs, 0);
mjs_val_t obj_delay = mjs_arg(mjs, 1);
if(!mjs_is_number(obj_delay)) {
break;
}
delay_val = (uint32_t)mjs_get_int32(mjs, obj_delay);
if(delay_val > 60000) {
break;
}
}
if(!mjs_is_string(obj_string)) {
break;
}
text_str = mjs_get_string(mjs, &obj_string, &text_len);
if((text_str == NULL) || (text_len == 0)) {
break;
}
args_correct = true;
} while(0);
if(!args_correct) {
mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "");
mjs_return(mjs, MJS_UNDEFINED);
return;
}
if(alt) {
ducky_numlock_on();
}
for(size_t i = 0; i < text_len; i++) {
if(alt) {
// Convert character to ascii numeric value
char ascii_str[4];
snprintf(ascii_str, sizeof(ascii_str), "%u", (uint8_t)text_str[i]);
ducky_altchar(badusb, ascii_str);
} else {
uint16_t keycode = ASCII_TO_KEY(badusb->layout, text_str[i]);
furi_hal_hid_kb_press(keycode);
furi_hal_hid_kb_release(keycode);
}
if(delay_val > 0) {
bool need_exit = js_delay_with_flags(mjs, delay_val);
if(need_exit) {
mjs_return(mjs, MJS_UNDEFINED);
return;
}
}
}
if(ln) {
furi_hal_hid_kb_press(HID_KEYBOARD_RETURN);
furi_hal_hid_kb_release(HID_KEYBOARD_RETURN);
}
mjs_return(mjs, MJS_UNDEFINED);
}
static void js_badusb_print(struct mjs* mjs) {
badusb_print(mjs, false, false);
}
static void js_badusb_println(struct mjs* mjs) {
badusb_print(mjs, true, false);
}
static void js_badusb_alt_print(struct mjs* mjs) {
badusb_print(mjs, false, true);
}
static void js_badusb_alt_println(struct mjs* mjs) {
badusb_print(mjs, true, true);
}
static void* js_badusb_create(struct mjs* mjs, mjs_val_t* object) {
JsBadusbInst* badusb = malloc(sizeof(JsBadusbInst));
mjs_val_t badusb_obj = mjs_mk_object(mjs);
mjs_set(mjs, badusb_obj, INST_PROP_NAME, ~0, mjs_mk_foreign(mjs, badusb));
mjs_set(mjs, badusb_obj, "setup", ~0, MJS_MK_FN(js_badusb_setup));
mjs_set(mjs, badusb_obj, "quit", ~0, MJS_MK_FN(js_badusb_quit));
mjs_set(mjs, badusb_obj, "isConnected", ~0, MJS_MK_FN(js_badusb_is_connected));
mjs_set(mjs, badusb_obj, "press", ~0, MJS_MK_FN(js_badusb_press));
mjs_set(mjs, badusb_obj, "hold", ~0, MJS_MK_FN(js_badusb_hold));
mjs_set(mjs, badusb_obj, "release", ~0, MJS_MK_FN(js_badusb_release));
mjs_set(mjs, badusb_obj, "print", ~0, MJS_MK_FN(js_badusb_print));
mjs_set(mjs, badusb_obj, "println", ~0, MJS_MK_FN(js_badusb_println));
mjs_set(mjs, badusb_obj, "altPrint", ~0, MJS_MK_FN(js_badusb_alt_print));
mjs_set(mjs, badusb_obj, "altPrintln", ~0, MJS_MK_FN(js_badusb_alt_println));
*object = badusb_obj;
return badusb;
}
static void js_badusb_destroy(void* inst) {
JsBadusbInst* badusb = inst;
js_badusb_quit_free(badusb);
free(badusb);
}
static const JsModuleDescriptor js_badusb_desc = {
"badusb",
js_badusb_create,
js_badusb_destroy,
};
static const FlipperAppPluginDescriptor plugin_descriptor = {
.appid = PLUGIN_APP_ID,
.ep_api_version = PLUGIN_API_VERSION,
.entry_point = &js_badusb_desc,
};
const FlipperAppPluginDescriptor* js_badusb_ep(void) {
return &plugin_descriptor;
}
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