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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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<one line to give the program's name and a brief idea of what it does.>
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
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This is free software, and you are welcome to redistribute it
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The hypothetical commands `show w' and `show c' should show the appropriate
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For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
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may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# Remote Touchpad
Control mouse and keyboard from the webbrowser of a smartphone (or any other device with a touchscreen).
To take control just open the displayed URL or scan the QR code.
Supports with Linux/X11 and Windows.
## Screenshots
![screenshot 1](https://raw.githubusercontent.com/Unrud/remote-touchpad/master/screenshots/1.png)
![screenshot 2](https://raw.githubusercontent.com/Unrud/remote-touchpad/master/screenshots/2.png)
![screenshot 3](https://raw.githubusercontent.com/Unrud/remote-touchpad/master/screenshots/3.png)

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package main
//go:generate go-bindata-assetfs -o ./bindata.generated.go webdata/...

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<?xml version="1.0" encoding="UTF-8"?>
<component type="desktop">
<id>remote-touchpad.desktop</id>
<metadata_license>CC0-1.0</metadata_license>
<project_license>AGPL-3.0-or-later</project_license>
<name>Remote Touchpad</name>
<summary>Control mouse and keyboard from a smartphone</summary>
<description>
<p>
Control mouse and keyboard from the webbrowser of a smartphone (or any other device with a touchscreen).
To take control just open the displayed URL or scan the QR code.
</p>
<p>
Supports Linux/X11 and Windows.
</p>
</description>
<url type="bugtracker">https://github.com/Unrud/remote-touchpad/issues</url>
<url type="homepage">https://github.com/Unrud/remote-touchpad</url>
<developer_name>Unrud</developer_name>
<releases>
<release version="0.0.1" date="2018-06-23" />
</releases>
<screenshots>
<screenshot type="default">
<image>https://raw.githubusercontent.com/Unrud/remote-touchpad/0.0.1/screenshots/1.png</image>
</screenshot>
<screenshot>
<image>https://raw.githubusercontent.com/Unrud/remote-touchpad/0.0.1/screenshots/2.png</image>
</screenshot>
<screenshot>
<image>https://raw.githubusercontent.com/Unrud/remote-touchpad/0.0.1/screenshots/3.png</image>
</screenshot>
</screenshots>
<content_rating type="oars-1.1" />
</component>

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[Desktop Entry]
Version=1.0
Type=Application
Name=Remote Touchpad
Comment=Control mouse and keyboard from a smartphone
Terminal=true
Exec=remote-touchpad
Icon=remote-touchpad
Categories=Network;RemoteAccess;ConsoleOnly;

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{
"app-id" : "com.github.unrud.RemoteTouchpad",
"runtime" : "org.freedesktop.Platform",
"runtime-version" : "1.6",
"sdk" : "org.freedesktop.Sdk",
"command" : "remote-touchpad",
"rename-appdata-file" : "remote-touchpad.appdata.xml",
"rename-desktop-file" : "remote-touchpad.desktop",
"rename-icon" : "remote-touchpad",
"finish-args" : [
"--socket=x11",
"--share=network"
],
"build-options" : {
"append-path" : "/app/share/go/bin",
"env" : {
}
},
"modules" : [
{
"name" : "go-compiler",
"sources" : [
{
"only-arches" : [
"i386"
],
"type" : "archive",
"strip-components" : 0,
"url" : "https://dl.google.com/go/go1.10.3.linux-386.tar.gz",
"sha256" : "3d5fe1932c904a01acb13dae07a5835bffafef38bef9e5a05450c52948ebdeb4"
},
{
"only-arches" : [
"x86_64"
],
"type" : "archive",
"strip-components" : 0,
"url" : "https://dl.google.com/go/go1.10.3.linux-amd64.tar.gz",
"sha256" : "fa1b0e45d3b647c252f51f5e1204aba049cde4af177ef9f2181f43004f901035"
},
{
"only-arches" : [
"arm"
],
"type" : "archive",
"strip-components" : 0,
"url" : "https://dl.google.com/go/go1.10.3.linux-armv6l.tar.gz",
"sha256" : "d3df3fa3d153e81041af24f31a82f86a21cb7b92c1b5552fb621bad0320f06b6"
},
{
"only-arches" : [
"aarch64"
],
"type" : "archive",
"strip-components" : 0,
"url" : "https://dl.google.com/go/go1.10.3.linux-arm64.tar.gz",
"sha256" : "355128a05b456c9e68792143801ad18e0431510a53857f640f7b30ba92624ed2"
}
],
"buildsystem" : "simple",
"build-commands" : [
"mkdir -p /app/share",
"cp -r go /app/share"
],
"build-options" : {
"no-debuginfo" : true
},
"cleanup" : [
"*"
]
},
{
"name" : "remote-desktop",
"sources" : [
{
"type" : "git",
"url" : "https://github.com/golang/net",
"commit" : "afe8f62b1d6bbd81f31868121a50b06d8188e1f9",
"dest" : "src/golang.org/x/net"
},
{
"type" : "git",
"url" : "https://github.com/skip2/go-qrcode",
"commit" : "cf5f9fa2f0d847edb8e038db7ed975e239095e1a",
"dest" : "src/github.com/skip2/go-qrcode"
},
{
"type" : "git",
"url" : "https://github.com/elazarl/go-bindata-assetfs",
"commit" : "38087fe4dafb822e541b3f7955075cc1c30bd294",
"dest" : "src/github.com/elazarl/go-bindata-assetfs"
},
{
"type" : "git",
"path" : "..",
"branch" : "master",
"dest" : "src/github.com/unrud/remote-touchpad"
}
],
"buildsystem" : "simple",
"build-commands" : [
"env GOPATH=\"$(pwd)\" go build github.com/unrud/remote-touchpad",
"install -Dm0755 -t /app/bin remote-touchpad",
"install -Dm0644 -t /app/share/appdata src/github.com/unrud/remote-touchpad/desktop/remote-touchpad.appdata.xml",
"install -Dm0644 -t /app/share/applications src/github.com/unrud/remote-touchpad/desktop/remote-touchpad.desktop",
"install -Dm0644 src/github.com/unrud/remote-touchpad/desktop/remote-touchpad_64.png /app/share/icons/hicolor/64x64/apps/remote-touchpad.png",
"install -Dm0644 src/github.com/unrud/remote-touchpad/desktop/remote-touchpad_128.png /app/share/icons/hicolor/128x128/apps/remote-touchpad.png",
"install -Dm0644 src/github.com/unrud/remote-touchpad/desktop/remote-touchpad_256.png /app/share/icons/hicolor/256x256/apps/remote-touchpad.png",
"install -Dm0644 src/github.com/unrud/remote-touchpad/desktop/remote-touchpad_512.png /app/share/icons/hicolor/512x512/apps/remote-touchpad.png"
]
}
]
}

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/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"fmt"
"net"
"strings"
)
func FindDefaultHost() string {
fallbackAddr := ""
for _, publicIP := range []string{"2001:4860:4860::8888", "8.8.8.8"} {
addr := fmt.Sprintf("[%s]:80", publicIP)
conn, err := net.Dial("udp", addr)
if err != nil {
continue
}
conn.Close()
host, _, err := net.SplitHostPort(conn.LocalAddr().String())
if err != nil {
continue
}
return host
}
interfaces, err := net.Interfaces()
if err != nil {
goto fallback
}
for _, inter := range interfaces {
if inter.Flags&net.FlagUp == 0 || inter.Flags&net.FlagLoopback != 0 {
continue
}
addrs, err := inter.Addrs()
if err != nil {
continue
}
addrs:
for _, addr := range addrs {
ip, _, err := net.ParseCIDR(addr.String())
if err != nil {
continue
}
if fallbackAddr == "" {
fallbackAddr = ip.String()
}
for _, linkLocalPrefix := range []string{"169.254.", "fe8", "fe9", "fea", "feb"} {
if strings.HasPrefix(ip.String(), linkLocalPrefix) {
continue addrs
}
}
return ip.String()
}
}
fallback:
if fallbackAddr != "" {
return fallbackAddr
}
return "localhost"
}

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package main
//go:generate rsrc -ico desktop/remote-touchpad.ico -o icon.syso

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/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"crypto/hmac"
"crypto/rand"
"crypto/sha256"
"encoding/base64"
"errors"
"flag"
"fmt"
"golang.org/x/net/websocket"
"log"
mathrand "math/rand"
"net"
"net/http"
"strconv"
"strings"
"time"
)
const (
defaultSecretLength int = 8
authenticationRateLimit time.Duration = time.Second / 10
authenticationRateBurst int = 10
challengeLength int = 8
defaultBind string = ":0"
version string = "0.0.1"
)
func processCommand(plugin Plugin, command string) error {
commandParts := strings.Split(command, " ")
if commandParts[0] == "KeyboardText" {
text := strings.Join(commandParts[1:], " ")
return plugin.KeyboardText(text)
}
if len(commandParts) != 3 {
return errors.New("wrong number of arguments")
}
x, err := strconv.ParseInt(commandParts[1], 10, 32)
if err != nil {
return err
}
y, err := strconv.ParseInt(commandParts[2], 10, 32)
if err != nil {
return err
}
if commandParts[0] == "PointerMove" {
return plugin.PointerMove(int(x), int(y))
}
if commandParts[0] == "PointerScroll" {
return plugin.PointerScroll(int(x), int(y))
}
if commandParts[0] == "PointerButton" {
if x <= 0 || x > 3 {
return errors.New("unknown pointer button")
}
b := true
if y == 0 {
b = false
}
return plugin.PointerButton(uint(x), b)
}
return errors.New("unknown command")
}
type challenge struct {
message, expectedResponse string
}
func (c challenge) verify(response string) bool {
return c.expectedResponse == response
}
func authenticationChallengeGenerator(secret string, challenges chan<- challenge) {
unsecureSource := mathrand.NewSource(time.Now().UnixNano())
unsecureRand := mathrand.New(unsecureSource)
b := make([]byte, challengeLength)
for {
if _, err := unsecureRand.Read(b[:]); err != nil {
log.Fatal(err)
}
message := base64.StdEncoding.EncodeToString(b[:])
mac := hmac.New(sha256.New, []byte(message))
mac.Write([]byte(secret))
challenges <- challenge{
message: message,
expectedResponse: base64.StdEncoding.EncodeToString(mac.Sum(nil)),
}
time.Sleep(authenticationRateLimit)
}
}
func secureRandBase64(length int) string {
b := make([]byte, length)
if _, err := rand.Read(b[:]); err != nil {
log.Fatal(err)
}
return base64.StdEncoding.EncodeToString(b[:])
}
func main() {
var bind, certFile, keyFile, secret string
var showVersion, invert bool
flag.BoolVar(&showVersion, "version", false, "show program's version number and exit")
flag.StringVar(&bind, "bind", defaultBind, "bind server to [IP]:PORT")
flag.StringVar(&secret, "secret", "", "shared secret for client authentication")
flag.StringVar(&certFile, "cert", "", "file containing TLS certificate")
flag.StringVar(&keyFile, "key", "", "file containing TLS private key")
flag.BoolVar(&invert, "invert", false, "use inverse colors for QR code")
flag.Parse()
if showVersion {
fmt.Println(version)
return
}
if certFile != "" && keyFile == "" {
log.Fatal("TLS certificate missing")
}
if certFile == "" && keyFile != "" {
log.Fatal("TLS private key missing")
}
tls := certFile != "" && keyFile != ""
if secret == "" {
secret = secureRandBase64(defaultSecretLength)
}
var plugin Plugin
platformErrors := ""
for _, f := range Plugins {
var err error
plugin, err = f()
if err == nil {
break
} else if _, ok := err.(UnsupportedPlatformError); ok {
platformErrors += err.Error() + "\n"
} else {
log.Fatal(err)
}
}
if plugin == nil {
log.Fatal("unsupported platform:\n" + platformErrors)
}
defer plugin.Close()
authenticationChallenges := make(chan challenge, authenticationRateBurst)
go authenticationChallengeGenerator(secret, authenticationChallenges)
listener, err := net.Listen("tcp", bind)
if err != nil {
log.Fatal(err)
}
addr := listener.Addr().(*net.TCPAddr)
host := ""
bindHost, _, err := net.SplitHostPort(bind)
if err != nil {
log.Fatal(err)
}
for _, b := range addr.IP {
if b != 0 {
host = bindHost
break
}
}
if host == "" {
host = FindDefaultHost()
}
port := addr.Port
mux := http.NewServeMux()
mux.Handle("/", http.FileServer(assetFS()))
mux.Handle("/ws", websocket.Handler(func(ws *websocket.Conn) {
var message string
challenge := <-authenticationChallenges
websocket.Message.Send(ws, challenge.message)
if err := websocket.Message.Receive(ws, &message); err != nil {
return
}
if !challenge.verify(message) {
return
}
for {
if err := websocket.Message.Receive(ws, &message); err != nil {
return
}
if err := processCommand(plugin, message); err != nil {
return
}
}
}))
domain := host
if port != 80 && !tls || port != 443 && tls {
domain = net.JoinHostPort(host, strconv.Itoa(port))
}
scheme := "http"
if tls {
scheme = "https"
}
url := fmt.Sprintf("%s://%s/#%s\n", scheme, domain, secret)
readyMsg := "ready: " + url
qrCode, _ := GenerateQRCode(url, invert)
readyMsg += qrCode
if !tls {
readyMsg += ("" +
"▌ WARNING: TLS is not enabled ▐\n" +
"▌Don't use in an untrusted network!▐\n")
}
log.Print(readyMsg)
if tls {
err = http.ServeTLS(listener, mux, certFile, keyFile)
} else {
err = http.Serve(listener, mux)
}
log.Fatal(err)
}

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/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import "fmt"
var Plugins [](func() (Plugin, error)) = [](func() (Plugin, error)){
InitX11Plugin,
InitWindowsPlugin,
}
type UnsupportedPlatformError struct {
name string
message string
}
func (e UnsupportedPlatformError) Error() string {
return fmt.Sprintf("%s plugin: %s", e.name, e.message)
}
type Plugin interface {
Close() error
KeyboardText(text string) error
PointerButton(button uint, press bool) error
PointerMove(deltaX, deltaY int) error
PointerScroll(stepsHorizontal, stepsVertical int) error
}

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// +build windows
/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"errors"
"syscall"
"unsafe"
)
const (
inputMouse uintptr = 0x0
inputKeyboard uintptr = 0x1
keyeventfKeyup uint32 = 0x2
keyeventfUnicode uint32 = 0x4
mouseeventfMove uint32 = 0x1
mouseeventfLeftdown uint32 = 0x2
mouseeventfLeftup uint32 = 0x4
mouseeventfRightdown uint32 = 0x8
mouseeventfRightup uint32 = 0x10
mouseeventfMiddledown uint32 = 0x20
mouseeventfMiddleup uint32 = 0x40
mouseeventfWheel uint32 = 0x800
mouseeventfHwheel uint32 = 0x1000
wheelDelta int = 120
)
type mouseInput struct {
typ uintptr // HACK: padded uint32
dx, dy int32
mouseData, dwFlags, time uint32
dwExtraInfo uintptr
}
type keybdInput struct {
typ uintptr // HACK: padded uint32
wVk, wScan uint16
dwFlags, time uint32
dwExtraInfo uintptr
padding [8]byte
}
type windowsPlugin struct {
userDLL *syscall.LazyDLL
sendInputProc *syscall.LazyProc
}
func InitWindowsPlugin() (Plugin, error) {
p := &windowsPlugin{}
p.userDLL = syscall.NewLazyDLL("user32.dll")
p.sendInputProc = p.userDLL.NewProc("SendInput")
if err := p.sendInputProc.Find(); err != nil {
return nil, UnsupportedPlatformError{"Windows", err.Error()}
}
return p, nil
}
func (p *windowsPlugin) Close() error {
return nil
}
func (p *windowsPlugin) KeyboardText(text string) error {
runes := []rune(text)
if len(runes) == 0 {
return nil
}
inputs := make([]keybdInput, len(runes)*2)
for i := range inputs {
inputs[i].typ = inputKeyboard
inputs[i].wScan = uint16(runes[i/2])
inputs[i].dwFlags = keyeventfUnicode
if i%2 == 1 {
inputs[i].dwFlags |= keyeventfKeyup
}
}
if r, _, err := p.sendInputProc.Call(uintptr(len(inputs)), uintptr(unsafe.Pointer(&inputs[0])), unsafe.Sizeof(inputs[0])); int(r) != len(inputs) {
return err
}
return nil
}
func (p *windowsPlugin) PointerButton(button uint, press bool) error {
if button == 0 || button > 3 {
return errors.New("unsupported pointer button")
}
input := mouseInput{
typ: inputMouse,
}
if button == 1 && press {
input.dwFlags = mouseeventfLeftdown
} else if button == 1 {
input.dwFlags = mouseeventfLeftup
} else if button == 2 && press {
input.dwFlags = mouseeventfMiddledown
} else if button == 2 {
input.dwFlags = mouseeventfMiddleup
} else if button == 3 && press {
input.dwFlags = mouseeventfRightdown
} else if button == 3 {
input.dwFlags = mouseeventfRightup
}
if r, _, err := p.sendInputProc.Call(1, uintptr(unsafe.Pointer(&input)), unsafe.Sizeof(input)); int(r) != 1 {
return err
}
return nil
}
func (p *windowsPlugin) PointerMove(deltaX, deltaY int) error {
input := mouseInput{
typ: inputMouse,
dx: int32(deltaX),
dy: int32(deltaY),
dwFlags: mouseeventfMove,
}
if r, _, err := p.sendInputProc.Call(1, uintptr(unsafe.Pointer(&input)), unsafe.Sizeof(input)); int(r) != 1 {
return err
}
return nil
}
func (p *windowsPlugin) PointerScroll(stepsHorizontal, stepsVertical int) error {
inputs := make([]mouseInput, 0, 2)
if stepsHorizontal != 0 {
inputs = append(inputs, mouseInput{
typ: inputMouse,
dwFlags: mouseeventfHwheel,
mouseData: uint32(stepsHorizontal * wheelDelta),
})
}
if stepsVertical != 0 {
inputs = append(inputs, mouseInput{
typ: inputMouse,
dwFlags: mouseeventfWheel,
mouseData: uint32(stepsVertical * wheelDelta),
})
}
if len(inputs) == 0 {
return nil
}
if r, _, err := p.sendInputProc.Call(uintptr(len(inputs)), uintptr(unsafe.Pointer(&inputs[0])), unsafe.Sizeof(inputs[0])); int(r) != len(inputs) {
return err
}
return nil
}

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// +build !windows
/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
package main
func InitWindowsPlugin() (Plugin, error) {
return nil, UnsupportedPlatformError{"Windows", "disabled"}
}

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// +build linux
/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
package main
// #cgo LDFLAGS: -lX11 -lXtst
// #include <X11/Xlib.h>
// #include <X11/Intrinsic.h>
// #include <X11/extensions/XTest.h>
import "C"
import (
"errors"
"sync"
"time"
"unsafe"
)
const typingDelay time.Duration = 100 * time.Millisecond
type x11Plugin struct {
display *C.Display
lock sync.Mutex
}
func InitX11Plugin() (Plugin, error) {
display := C.XOpenDisplay(nil)
if display == nil {
return nil, UnsupportedPlatformError{"X11", "failed to connect to X server"}
}
return &x11Plugin{display: display}, nil
}
func (p *x11Plugin) Close() error {
p.lock.Lock()
defer p.lock.Unlock()
if p.display == nil {
return errors.New("X server connection closed")
}
C.XCloseDisplay(p.display)
p.display = nil
return nil
}
func (p *x11Plugin) KeyboardText(text string) error {
p.lock.Lock()
defer p.lock.Unlock()
if p.display == nil {
return errors.New("X server connection closed")
}
if text == "" {
return nil
}
var minKeycodes, maxKeycodes C.int
C.XDisplayKeycodes(p.display, &minKeycodes, &maxKeycodes)
var keysymsPerKeycode C.int
keysyms := C.XGetKeyboardMapping(p.display, C.KeyCode(minKeycodes), maxKeycodes-minKeycodes+1, &keysymsPerKeycode)
if keysyms == nil {
return errors.New("failed to get keyboard mapping")
}
emptyKeycode := C.KeyCode(0)
keycodes:
for keycode := C.KeyCode(minKeycodes); keycode <= C.KeyCode(maxKeycodes); keycode++ {
for i := 0; i < int(keysymsPerKeycode); i++ {
keysymsIndex := int(keycode-C.KeyCode(minKeycodes))*int(keysymsPerKeycode) + i
keysym := *(*C.KeySym)(unsafe.Pointer(uintptr(unsafe.Pointer(keysyms)) + uintptr(keysymsIndex)*unsafe.Sizeof(*keysyms)))
if keysym != 0 {
continue keycodes
}
}
emptyKeycode = keycode
break
}
C.XFree(unsafe.Pointer(keysyms))
if emptyKeycode == 0 {
return errors.New("no empty keycode found")
}
keycodeMapping := make([]C.KeySym, keysymsPerKeycode)
for _, runeValue := range text {
keysym := C.KeySym(0x01000000 + runeValue)
for i := range keycodeMapping {
keycodeMapping[i] = keysym
}
C.XChangeKeyboardMapping(p.display, C.int(emptyKeycode), keysymsPerKeycode, (*C.KeySym)(unsafe.Pointer(&keycodeMapping[0])), 1)
C.XTestFakeKeyEvent(p.display, C.uint(emptyKeycode), C.True, 0)
C.XTestFakeKeyEvent(p.display, C.uint(emptyKeycode), C.False, 0)
// race condition!
C.XFlush(p.display)
time.Sleep(typingDelay)
}
for i := range keycodeMapping {
keycodeMapping[i] = 0
}
C.XChangeKeyboardMapping(p.display, C.int(emptyKeycode), keysymsPerKeycode, (*C.KeySym)(unsafe.Pointer(&keycodeMapping[0])), 1)
C.XFlush(p.display)
return nil
}
func (p *x11Plugin) PointerButton(button uint, press bool) error {
p.lock.Lock()
defer p.lock.Unlock()
if p.display == nil {
return errors.New("X server connection closed")
}
if button == 0 || button > 9 {
return errors.New("unsupported pointer button")
}
var pressC C.int = C.False
if press {
pressC = C.True
}
C.XTestFakeButtonEvent(p.display, C.uint(button), pressC, 0)
C.XFlush(p.display)
return nil
}
func (p *x11Plugin) PointerMove(deltaX, deltaY int) error {
p.lock.Lock()
defer p.lock.Unlock()
if p.display == nil {
return errors.New("X server connection closed")
}
C.XTestFakeRelativeMotionEvent(p.display, C.int(deltaX), C.int(deltaY), 0)
C.XFlush(p.display)
return nil
}
func (p *x11Plugin) PointerScroll(stepsHorizontal, stepsVertical int) error {
var buttonHorizontal uint = 7
if stepsHorizontal < 0 {
buttonHorizontal = 6
stepsHorizontal = -stepsHorizontal
}
for i := 0; i < stepsHorizontal; i++ {
if err := p.PointerButton(buttonHorizontal, true); err != nil {
return err
}
if err := p.PointerButton(buttonHorizontal, false); err != nil {
return err
}
}
var buttonVertical uint = 5
if stepsVertical < 0 {
buttonVertical = 4
stepsVertical = -stepsVertical
}
for i := 0; i < stepsVertical; i++ {
if err := p.PointerButton(buttonVertical, true); err != nil {
return err
}
if err := p.PointerButton(buttonVertical, false); err != nil {
return err
}
}
return nil
}

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// +build !linux
/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
package main
func InitX11Plugin() (Plugin, error) {
return nil, UnsupportedPlatformError{"X11", "disabled"}
}

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/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import qrcode "github.com/skip2/go-qrcode"
func GenerateQRCode(message string, invert bool) (string, error) {
q, err := qrcode.New(message, qrcode.Medium)
if err != nil {
return "", err
}
return qrCodeToString(q.Bitmap(), invert), nil
}
func qrCodeToString(bits [][]bool, invert bool) string {
s := ""
for y := -1; y < len(bits); y += 2 {
for x := range bits[0] {
upper := !invert
if 0 <= y && y < len(bits) {
upper = bits[y][x]
}
lower := !invert
if 0 <= y+1 && y+1 < len(bits) {
lower = bits[y+1][x]
}
if upper != invert && lower != invert {
s += " "
} else if upper == invert && lower != invert {
s += "▀"
} else if upper != invert && lower == invert {
s += "▄"
} else {
s += "█"
}
}
s += "\n"
}
return s
}

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/*
* Copyright (c) 2018 Unrud<unrud@outlook.com>
*
* This file is part of Remote-Touchpad.
*
* Foobar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Remote-Touchpad is distributed in the hope that 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
// [1 Touch, 2 Touches, 3 Touches]
const TOUCH_MOVE_THRESHOLD = [10, 15, 15];
const TOUCH_TIMEOUT = 250;
const MOVE_MULT = 1;
const SCROLL_MULT = 0.05;
// [[px/s, mult], ...]
const POINTER_ACCELERATION = [[0, 0], [87, 1], [173, 1], [553, 2]];
const UPDATE_INTERVAL = 50;
const MAX_IDLE_UPDATES = 10;
var ws;
var pad;
var padlabel;
var touchMoved = false;
var touchStart = 0;
var touchLastEnd = 0;
var touchReleasedCount = 0;
var ongoingTouches = [];
var moveXSum = 0;
var moveYSum = 0;
var scrollXSum = 0;
var scrollYSum = 0;
var dragging = false;
var draggingTimeout = null;
var updateTimer = null;
var idleUpdates = 0;
function fullscreenEnabled() {
return (document.fullscreenEnabled ||
document.webkitFullscreenEnabled ||
document.mozFullScreenEnabled ||
document.msFullscreenEnabled ||
false);
}
function requestFullscreen(e) {
if (e.requestFullscreen) {
e.requestFullscreen();
} else if (e.webkitRequestFullscreen) {
e.webkitRequestFullscreen();
} else if (e.mozRequestFullScreen) {
e.mozRequestFullScreen();
} else if (e.msRequestFullscreen) {
e.msRequestFullscreen();
}
}
function exitFullscreen() {
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.webkitExitFullscreen) {
document.webkitExitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
}
function fullscreenElement() {
return (document.fullscreenElement ||
document.webkitFullscreenElement ||
document.mozFullScreenElement ||
document.msFullscreenElement ||
null);
}
function addFullscreenchangeEventListener(listener) {
if (document.fullscreenElement !== undefined) {
document.addEventListener("fullscreenchange", listener);
} else if (document.webkitFullscreenElement !== undefined) {
document.addEventListener("webkitfullscreenchange", listener);
} else if (document.mozFullScreenElement !== undefined) {
document.addEventListener("mozfullscreenchange", listener);
} else if (document.msFullscreenElement !== undefined) {
document.addEventListener("MSFullscreenChange", listener);
}
}
function copyTouch(touch, timeStamp) {
return {
identifier: touch.identifier,
pageX: touch.pageX,
pageXStart: touch.pageX,
pageY: touch.pageY,
pageYStart: touch.pageY,
timeStamp: timeStamp
};
}
function ongoingTouchIndexById(idToFind) {
for (var i = 0; i < ongoingTouches.length; i++) {
var id = ongoingTouches[i].identifier;
if (id == idToFind) {
return i;
}
}
return -1;
}
function calculatePointerAccelerationMult(speed) {
for (var i = 0; i < POINTER_ACCELERATION.length; i++) {
s2 = POINTER_ACCELERATION[i][0];
a2 = POINTER_ACCELERATION[i][1];
if (s2 <= speed) {
continue;
}
if (i == 0) {
return a2;
}
s1 = POINTER_ACCELERATION[i-1][0];
a1 = POINTER_ACCELERATION[i-1][1];
return ((speed-s1) / (s2-s1)) * (a2-a1) + a1;
}
if (POINTER_ACCELERATION.length > 0) {
return POINTER_ACCELERATION[POINTER_ACCELERATION.length-1][1];
}
return 1;
}
function onDraggingTimeout() {
draggingTimeout = null;
ws.send("PointerButton 1 0");
}
function updateMoveAndScroll() {
if (updateTimer == null) {
onUpdateTimeout();
if (UPDATE_INTERVAL > 0 && idleUpdates == 0) {
updateTimer = setInterval(onUpdateTimeout, UPDATE_INTERVAL);
}
}
}
function onUpdateTimeout() {
idleUpdates += 1;
var moveX = Math.trunc(moveXSum);
var moveY = Math.trunc(moveYSum);
if (Math.abs(moveX) >= 1 || Math.abs(moveY) >= 1) {
moveXSum -= moveX;
moveYSum -= moveY;
idleUpdates = 0;
ws.send("PointerMove " + moveX + " " + moveY);
}
var scrollX = Math.trunc(scrollXSum);
var scrollY = Math.trunc(scrollYSum);
if (Math.abs(scrollX) >= 1 || Math.abs(scrollY) >= 1) {
scrollXSum -= scrollX;
scrollYSum -= scrollY;
idleUpdates = 0;
ws.send("PointerScroll " + scrollX + " " + scrollY);
}
if (idleUpdates >= MAX_IDLE_UPDATES) {
clearInterval(updateTimer);
updateTimer = null;
}
}
function handleStart(evt) {
if (ongoingTouches.length == 0) {
touchStart = evt.timeStamp;
touchMoved = false;
touchReleasedCount = 0;
dragging = false;
}
var touches = evt.changedTouches;
for (var i = 0; i < touches.length; i++) {
if (touches[i].target !== pad && touches[i].target !== padlabel) {
continue;
}
evt.preventDefault();
ongoingTouches.push(copyTouch(touches[i], evt.timeStamp));
touchLastEnd = 0;
if (!dragging) {
moveXSum = Math.trunc(moveXSum);
moveYSum = Math.trunc(moveYSum);
}
scrollXSum = Math.trunc(scrollXSum);
scrollYSum = Math.trunc(scrollYSum);
if (draggingTimeout !== null) {
clearTimeout(draggingTimeout);
draggingTimeout = null;
dragging = true;
}
}
}
function handleEnd(evt) {
var touches = evt.changedTouches;
for (var i = 0; i < touches.length; i++) {
var idx = ongoingTouchIndexById(touches[i].identifier);
if (idx < 0) {
continue;
}
ongoingTouches.splice(idx, 1);
touchReleasedCount++;
touchLastEnd = evt.timeStamp;
}
if (touchReleasedCount > TOUCH_MOVE_THRESHOLD.length) {
touchMoved = true;
}
if (ongoingTouches.length == 0 && touchReleasedCount >= 1 &&
dragging) {
ws.send("PointerButton 1 0");
}
if (ongoingTouches.length == 0 && touchReleasedCount >= 1 &&
!touchMoved && evt.timeStamp - touchStart < TOUCH_TIMEOUT) {
var button = 0;
if (touchReleasedCount == 1) {
button = 1;
} else if (touchReleasedCount == 2) {
button = 3;
}else if (touchReleasedCount == 3) {
button = 2;
}
ws.send("PointerButton " + button + " 1");
if (button == 1) {
draggingTimeout = setTimeout(onDraggingTimeout, TOUCH_TIMEOUT);
} else {
ws.send("PointerButton " + button + " 0");
}
}
}
function handleCancel(evt) {
var touches = evt.changedTouches;
for (var i = 0; i < touches.length; i++) {
var idx = ongoingTouchIndexById(touches[i].identifier);
if (idx < 0) {
continue;
}
ongoingTouches.splice(idx, 1);
touchReleasedCount++;
touchLastEnd = evt.timeStamp;
touchMoved = true;
}
}
function handleMove(evt) {
var sumX = 0;
var sumY = 0;
var touches = evt.changedTouches;
for (var i = 0; i < touches.length; i++) {
var idx = ongoingTouchIndexById(touches[i].identifier);
if (idx < 0) {
continue;
}
var dist = Math.sqrt(Math.pow(touches[i].pageX - ongoingTouches[idx].pageXStart, 2) + Math.pow(touches[i].pageY - ongoingTouches[idx].pageYStart, 2));
if (ongoingTouches.length > TOUCH_MOVE_THRESHOLD.length || dist > TOUCH_MOVE_THRESHOLD[ongoingTouches.length - 1]) {
touchMoved = true;
}
var dx = touches[i].pageX - ongoingTouches[idx].pageX;
var dy = touches[i].pageY - ongoingTouches[idx].pageY;
var timeDelta = evt.timeStamp - ongoingTouches[idx].timeStamp;
sumX += dx * calculatePointerAccelerationMult(Math.abs(dx) / timeDelta * 1000);
sumY += dy * calculatePointerAccelerationMult(Math.abs(dy) / timeDelta * 1000);
ongoingTouches[idx].pageX = touches[i].pageX;
ongoingTouches[idx].pageY = touches[i].pageY;
ongoingTouches[idx].timeStamp = evt.timeStamp;
}
if (touchMoved && evt.timeStamp - touchLastEnd >= TOUCH_TIMEOUT) {
if (ongoingTouches.length == 1 || dragging) {
moveXSum += sumX * MOVE_MULT;
moveYSum += sumY * MOVE_MULT;
} else if (ongoingTouches.length == 2) {
scrollXSum -= sumX * SCROLL_MULT;
scrollYSum -= sumY * SCROLL_MULT;
}
updateMoveAndScroll();
}
}
function challengeResponse(message) {
var shaObj = new jsSHA("SHA-256", "TEXT");
shaObj.setHMACKey(message, "TEXT");
shaObj.update(window.location.hash.substr(1));
return btoa(shaObj.getHMAC("BYTES"));
}
window.addEventListener("load", function() {
var authenticated = false;
var opening = document.getElementById("opening");
var closed = document.getElementById("closed");
pad = document.getElementById("pad");
padlabel = document.getElementById("padlabel");
var keyboard = document.getElementById("keyboard");
var fullscreenbutton = document.getElementById("fullscreenbutton");
var text = document.getElementById("text");
closed.style.display = "none";
pad.style.display = "none";
keyboard.style.display = "none";
text.value = "";
ws = new WebSocket("ws://" + location.hostname +
(location.port ? ":" + location.port : "") +
"/ws");
ws.onmessage = function(event) {
if (authenticated) {
ws.close();
return;
}
authenticated = true;
ws.send(challengeResponse(event.data));
opening.style.display = "none";
if (history.state == "keyboard") {
keyboard.style.display = "flex";
text.focus();
} else {
pad.style.display = "flex";
}
};
ws.onclose = function() {
if (fullscreenElement()) {
exitFullscreen();
}
opening.style.display = "none";
pad.style.display = "none";
keyboard.style.display = "none"
closed.style.display = "flex";
};
document.getElementById("keyboardbutton").addEventListener("click",
function(e) {
if (fullscreenElement()) {
exitFullscreen();
}
pad.style.display = "none";
keyboard.style.display = "flex";
text.focus();
history.pushState("keyboard", "Remote Keyboard");
});
if (!fullscreenEnabled()) {
fullscreenbutton.style.display = "none";
}
fullscreenbutton.addEventListener("click", function(e) {
if (fullscreenElement()) {
exitFullscreen();
} else {
requestFullscreen(pad);
}
});
document.getElementById("sendbutton").addEventListener("click",
function(e) {
if (text.value != "") {
ws.send("KeyboardText " + text.value);
text.value = "";
}
window.history.back();
});
window.onpopstate = function(event) {
if (keyboard.style.display == "flex") {
pad.style.display = "flex";
keyboard.style.display = "none";
} else {
window.history.back();
}
};
pad.addEventListener("touchstart", handleStart, false);
pad.addEventListener("touchend", handleEnd, false);
pad.addEventListener("touchcancel", handleCancel, false);
pad.addEventListener("touchmove", handleMove, false);
}, false);

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width initial-scale=1, maximum-scale=1, user-scalable=0" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<script src="fn.js"></script>
<script src="sha256.js"></script>
<title>Remote Touchpad</title>
<link href="main.css" media="screen" rel="stylesheet" />
<link href="icon.png" type="image/png" rel="shortcut icon" />
</head>
<body>
<div id="opening">
<p>Connecting...</p>
</div>
<div id="closed">
<p>Disconnected</p>
</div>
<div id="pad">
<p id="padlabel">Touchpad</p>
<div class="buttons">
<button id="fullscreenbutton">▢</button>
<button id="keyboardbutton">⌨</button>
</div>
</div>
<div id="keyboard">
<textarea id="text"></textarea>
<button id="sendbutton">➣</button>
</div>
</body>
</html>

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html, body, #pad, #keyboard, #opening, #closed {
width: 100%;
height: 100%;
margin: 0;
}
body {
font-family: sans;
}
#pad, #sendbutton, #opening, #closed {
background-color: #404040 !important;
background-image: url(tex.png);
}
#opening, #closed {
display: flex;
align-items: center;
justify-content: center;
font-size: 2em;
color: white;
word-wrap: break-word;
}
#pad {
display: flex;
flex-direction: column;
}
#padlabel {
color: #424242;
text-shadow:
-1px -1px 0 #383838,
1px -1px 0 #383838,
-1px 1px 0 #383838,
1px 1px 0 #383838;
font-weight: bold;
margin-top: auto;
margin-bottom: auto;
text-align: center;
font-size: 4em;
word-wrap: break-word;
}
#fullscreenbutton, #keyboardbutton, #sendbutton {
background-color: transparent;
border: 1px solid black;
border-bottom: none;
height: 1.5em;
width: 2em;
font-size: 2em;
color: white;
}
#fullscreenbutton {
border-left: none;
}
#keyboardbutton {
border-right: none;
margin-left: auto;
}
#keyboard {
display: flex;
flex-direction: row;
}
#text {
flex: 2;
border: none;
resize: none;
font-size: 2em;
background-color: white;
color: black;
}
.buttons {
display: flex;
}
#sendbutton {
border-right: none;
border-top: none;
height: 100%;
}
@media (max-aspect-ratio: 4/3) {
#keyboard {
flex-direction: column;
}
#sendbutton {
border-left: none;
border-top: 1px solid black;
height: 1.5em;
width: 100%;
}
}

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/*
A JavaScript implementation of the SHA family of hashes, as
defined in FIPS PUB 180-4 and FIPS PUB 202, as well as the corresponding
HMAC implementation as defined in FIPS PUB 198a
Copyright 2008-2018 Brian Turek, 1998-2009 Paul Johnston & Contributors
Distributed under the BSD License
See http://caligatio.github.com/jsSHA/ for more information
*/
'use strict';(function(I){function w(c,a,d){var l=0,b=[],g=0,f,n,k,e,h,q,y,p,m=!1,t=[],r=[],u,z=!1;d=d||{};f=d.encoding||"UTF8";u=d.numRounds||1;if(u!==parseInt(u,10)||1>u)throw Error("numRounds must a integer >= 1");if(0===c.lastIndexOf("SHA-",0))if(q=function(b,a){return A(b,a,c)},y=function(b,a,l,f){var g,e;if("SHA-224"===c||"SHA-256"===c)g=(a+65>>>9<<4)+15,e=16;else throw Error("Unexpected error in SHA-2 implementation");for(;b.length<=g;)b.push(0);b[a>>>5]|=128<<24-a%32;a=a+l;b[g]=a&4294967295;
b[g-1]=a/4294967296|0;l=b.length;for(a=0;a<l;a+=e)f=A(b.slice(a,a+e),f,c);if("SHA-224"===c)b=[f[0],f[1],f[2],f[3],f[4],f[5],f[6]];else if("SHA-256"===c)b=f;else throw Error("Unexpected error in SHA-2 implementation");return b},p=function(b){return b.slice()},"SHA-224"===c)h=512,e=224;else if("SHA-256"===c)h=512,e=256;else throw Error("Chosen SHA variant is not supported");else throw Error("Chosen SHA variant is not supported");k=B(a,f);n=x(c);this.setHMACKey=function(b,a,g){var e;if(!0===m)throw Error("HMAC key already set");
if(!0===z)throw Error("Cannot set HMAC key after calling update");f=(g||{}).encoding||"UTF8";a=B(a,f)(b);b=a.binLen;a=a.value;e=h>>>3;g=e/4-1;if(e<b/8){for(a=y(a,b,0,x(c));a.length<=g;)a.push(0);a[g]&=4294967040}else if(e>b/8){for(;a.length<=g;)a.push(0);a[g]&=4294967040}for(b=0;b<=g;b+=1)t[b]=a[b]^909522486,r[b]=a[b]^1549556828;n=q(t,n);l=h;m=!0};this.update=function(a){var c,f,e,d=0,p=h>>>5;c=k(a,b,g);a=c.binLen;f=c.value;c=a>>>5;for(e=0;e<c;e+=p)d+h<=a&&(n=q(f.slice(e,e+p),n),d+=h);l+=d;b=f.slice(d>>>
5);g=a%h;z=!0};this.getHash=function(a,f){var d,h,k,q;if(!0===m)throw Error("Cannot call getHash after setting HMAC key");k=C(f);switch(a){case "HEX":d=function(a){return D(a,e,k)};break;case "B64":d=function(a){return E(a,e,k)};break;case "BYTES":d=function(a){return F(a,e)};break;case "ARRAYBUFFER":try{h=new ArrayBuffer(0)}catch(v){throw Error("ARRAYBUFFER not supported by this environment");}d=function(a){return G(a,e)};break;default:throw Error("format must be HEX, B64, BYTES, or ARRAYBUFFER");
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if("string"!==typeof a.b64Pad)throw Error("Invalid b64Pad formatting option");return a}function B(c,a){var d;switch(a){case "UTF8":case "UTF16BE":case "UTF16LE":break;default:throw Error("encoding must be UTF8, UTF16BE, or UTF16LE");}switch(c){case "HEX":d=function(a,b,c){var f=a.length,d,k,e,h,q;if(0!==f%2)throw Error("String of HEX type must be in byte increments");b=b||[0];c=c||0;q=c>>>3;for(d=0;d<f;d+=2){k=parseInt(a.substr(d,2),16);if(isNaN(k))throw Error("String of HEX type contains invalid characters");
h=(d>>>1)+q;for(e=h>>>2;b.length<=e;)b.push(0);b[e]|=k<<8*(3+h%4*-1)}return{value:b,binLen:4*f+c}};break;case "TEXT":d=function(c,b,d){var f,n,k=0,e,h,q,m,p,r;b=b||[0];d=d||0;q=d>>>3;if("UTF8"===a)for(r=3,e=0;e<c.length;e+=1)for(f=c.charCodeAt(e),n=[],128>f?n.push(f):2048>f?(n.push(192|f>>>6),n.push(128|f&63)):55296>f||57344<=f?n.push(224|f>>>12,128|f>>>6&63,128|f&63):(e+=1,f=65536+((f&1023)<<10|c.charCodeAt(e)&1023),n.push(240|f>>>18,128|f>>>12&63,128|f>>>6&63,128|f&63)),h=0;h<n.length;h+=1){p=k+
q;for(m=p>>>2;b.length<=m;)b.push(0);b[m]|=n[h]<<8*(r+p%4*-1);k+=1}else if("UTF16BE"===a||"UTF16LE"===a)for(r=2,n="UTF16LE"===a&&!0||"UTF16LE"!==a&&!1,e=0;e<c.length;e+=1){f=c.charCodeAt(e);!0===n&&(h=f&255,f=h<<8|f>>>8);p=k+q;for(m=p>>>2;b.length<=m;)b.push(0);b[m]|=f<<8*(r+p%4*-1);k+=2}return{value:b,binLen:8*k+d}};break;case "B64":d=function(a,b,c){var f=0,d,k,e,h,q,m,p;if(-1===a.search(/^[a-zA-Z0-9=+\/]+$/))throw Error("Invalid character in base-64 string");k=a.indexOf("=");a=a.replace(/\=/g,
"");if(-1!==k&&k<a.length)throw Error("Invalid '=' found in base-64 string");b=b||[0];c=c||0;m=c>>>3;for(k=0;k<a.length;k+=4){q=a.substr(k,4);for(e=h=0;e<q.length;e+=1)d="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".indexOf(q[e]),h|=d<<18-6*e;for(e=0;e<q.length-1;e+=1){p=f+m;for(d=p>>>2;b.length<=d;)b.push(0);b[d]|=(h>>>16-8*e&255)<<8*(3+p%4*-1);f+=1}}return{value:b,binLen:8*f+c}};break;case "BYTES":d=function(a,b,c){var d,n,k,e,h;b=b||[0];c=c||0;k=c>>>3;for(n=0;n<a.length;n+=
1)d=a.charCodeAt(n),h=n+k,e=h>>>2,b.length<=e&&b.push(0),b[e]|=d<<8*(3+h%4*-1);return{value:b,binLen:8*a.length+c}};break;case "ARRAYBUFFER":try{d=new ArrayBuffer(0)}catch(l){throw Error("ARRAYBUFFER not supported by this environment");}d=function(a,b,c){var d,n,k,e,h;b=b||[0];c=c||0;n=c>>>3;h=new Uint8Array(a);for(d=0;d<a.byteLength;d+=1)e=d+n,k=e>>>2,b.length<=k&&b.push(0),b[k]|=h[d]<<8*(3+e%4*-1);return{value:b,binLen:8*a.byteLength+c}};break;default:throw Error("format must be HEX, TEXT, B64, BYTES, or ARRAYBUFFER");
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16)&65535)<<16|b&65535}function R(c,a,d,l,b){var g=(c&65535)+(a&65535)+(d&65535)+(l&65535)+(b&65535);return((c>>>16)+(a>>>16)+(d>>>16)+(l>>>16)+(b>>>16)+(g>>>16)&65535)<<16|g&65535}function x(c){var a=[],d;if(0===c.lastIndexOf("SHA-",0))switch(a=[3238371032,914150663,812702999,4144912697,4290775857,1750603025,1694076839,3204075428],d=[1779033703,3144134277,1013904242,2773480762,1359893119,2600822924,528734635,1541459225],c){case "SHA-224":break;case "SHA-256":a=d;break;case "SHA-384":a=[new m,new m,
new m,new m,new m,new m,new m,new m];break;case "SHA-512":a=[new m,new m,new m,new m,new m,new m,new m,new m];break;default:throw Error("Unknown SHA variant");}else throw Error("No SHA variants supported");return a}function A(c,a,d){var l,b,g,f,n,k,e,h,m,r,p,w,t,x,u,z,A,B,C,D,E,F,v=[],G;if("SHA-224"===d||"SHA-256"===d)r=64,w=1,F=Number,t=P,x=Q,u=R,z=N,A=O,B=L,C=M,E=K,D=J,G=H;else throw Error("Unexpected error in SHA-2 implementation");d=a[0];l=a[1];b=a[2];g=a[3];f=a[4];n=a[5];k=a[6];e=a[7];for(p=
0;p<r;p+=1)16>p?(m=p*w,h=c.length<=m?0:c[m],m=c.length<=m+1?0:c[m+1],v[p]=new F(h,m)):v[p]=x(A(v[p-2]),v[p-7],z(v[p-15]),v[p-16]),h=u(e,C(f),D(f,n,k),G[p],v[p]),m=t(B(d),E(d,l,b)),e=k,k=n,n=f,f=t(g,h),g=b,b=l,l=d,d=t(h,m);a[0]=t(d,a[0]);a[1]=t(l,a[1]);a[2]=t(b,a[2]);a[3]=t(g,a[3]);a[4]=t(f,a[4]);a[5]=t(n,a[5]);a[6]=t(k,a[6]);a[7]=t(e,a[7]);return a}var H;H=[1116352408,1899447441,3049323471,3921009573,961987163,1508970993,2453635748,2870763221,3624381080,310598401,607225278,1426881987,1925078388,2162078206,
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2756734187,3204031479,3329325298];"function"===typeof define&&define.amd?define(function(){return w}):"undefined"!==typeof exports?("undefined"!==typeof module&&module.exports&&(module.exports=w),exports=w):I.jsSHA=w})(this);

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