mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-12-23 11:59:30 +00:00
v0l/socks5/master/lib/socks5.dart
https://raw.githubusercontent.com/v0l/socks5/master/lib/socks5.dart
This commit is contained in:
sneurlax
parent
9e7567a26a
commit
cfce22fa73
1 changed files with 365 additions and 0 deletions
365
lib/networking/socks5.dart
Normal file
365
lib/networking/socks5.dart
Normal file
|
|
@ -0,0 +1,365 @@
|
|||
library socks;
|
||||
|
||||
import 'dart:async';
|
||||
import 'dart:convert';
|
||||
import 'dart:io';
|
||||
import 'dart:typed_data';
|
||||
|
||||
/// https://tools.ietf.org/html/rfc1928
|
||||
/// https://tools.ietf.org/html/rfc1929
|
||||
///
|
||||
|
||||
const SOCKSVersion = 0x05;
|
||||
const RFC1929Version = 0x01;
|
||||
|
||||
class AuthMethods {
|
||||
static const NoAuth = const AuthMethods._(0x00);
|
||||
static const GSSApi = const AuthMethods._(0x01);
|
||||
static const UsernamePassword = const AuthMethods._(0x02);
|
||||
static const NoAcceptableMethods = const AuthMethods._(0xFF);
|
||||
|
||||
final int _value;
|
||||
|
||||
const AuthMethods._(this._value);
|
||||
|
||||
String toString() {
|
||||
return const {
|
||||
0x00: 'AuthMethods.NoAuth',
|
||||
0x01: 'AuthMethods.GSSApi',
|
||||
0x02: 'AuthMethods.UsernamePassword',
|
||||
0xFF: 'AuthMethods.NoAcceptableMethods'
|
||||
}[_value];
|
||||
}
|
||||
}
|
||||
|
||||
class SOCKSState {
|
||||
static const Starting = const SOCKSState._(0x00);
|
||||
static const Auth = const SOCKSState._(0x01);
|
||||
static const RequestReady = const SOCKSState._(0x02);
|
||||
static const Connected = const SOCKSState._(0x03);
|
||||
static const AuthStarted = const SOCKSState._(0x04);
|
||||
|
||||
final int _value;
|
||||
|
||||
const SOCKSState._(this._value);
|
||||
|
||||
String toString() {
|
||||
return const [
|
||||
'SOCKSState.Starting',
|
||||
'SOCKSState.Auth',
|
||||
'SOCKSState.RequestReady',
|
||||
'SOCKSState.Connected',
|
||||
'SOCKSState.AuthStarted'
|
||||
][_value];
|
||||
}
|
||||
}
|
||||
|
||||
class SOCKSAddressType {
|
||||
static const IPv4 = const SOCKSAddressType._(0x01);
|
||||
static const Domain = const SOCKSAddressType._(0x03);
|
||||
static const IPv6 = const SOCKSAddressType._(0x04);
|
||||
|
||||
final int _value;
|
||||
|
||||
const SOCKSAddressType._(this._value);
|
||||
|
||||
String toString() {
|
||||
return const [
|
||||
null,
|
||||
'SOCKSAddressType.IPv4',
|
||||
null,
|
||||
'SOCKSAddressType.Domain',
|
||||
'SOCKSAddressType.IPv6',
|
||||
][_value];
|
||||
}
|
||||
}
|
||||
|
||||
class SOCKSCommand {
|
||||
static const Connect = const SOCKSCommand._(0x01);
|
||||
static const Bind = const SOCKSCommand._(0x02);
|
||||
static const UDPAssociate = const SOCKSCommand._(0x03);
|
||||
|
||||
final int _value;
|
||||
|
||||
const SOCKSCommand._(this._value);
|
||||
|
||||
String toString() {
|
||||
return const [
|
||||
null,
|
||||
'SOCKSCommand.Connect',
|
||||
'SOCKSCommand.Bind',
|
||||
'SOCKSCommand.UDPAssociate',
|
||||
][_value];
|
||||
}
|
||||
}
|
||||
|
||||
class SOCKSReply {
|
||||
static const Success = const SOCKSReply._(0x00);
|
||||
static const GeneralFailure = const SOCKSReply._(0x01);
|
||||
static const ConnectionNotAllowedByRuleset = const SOCKSReply._(0x02);
|
||||
static const NetworkUnreachable = const SOCKSReply._(0x03);
|
||||
static const HostUnreachable = const SOCKSReply._(0x04);
|
||||
static const ConnectionRefused = const SOCKSReply._(0x05);
|
||||
static const TTLExpired = const SOCKSReply._(0x06);
|
||||
static const CommandNotSupported = const SOCKSReply._(0x07);
|
||||
static const AddressTypeNotSupported = const SOCKSReply._(0x08);
|
||||
|
||||
final int _value;
|
||||
|
||||
const SOCKSReply._(this._value);
|
||||
|
||||
String toString() {
|
||||
return const [
|
||||
'SOCKSReply.Success',
|
||||
'SOCKSReply.GeneralFailure',
|
||||
'SOCKSReply.ConnectionNotAllowedByRuleset',
|
||||
'SOCKSReply.NetworkUnreachable',
|
||||
'SOCKSReply.HostUnreachable',
|
||||
'SOCKSReply.ConnectionRefused',
|
||||
'SOCKSReply.TTLExpired',
|
||||
'SOCKSReply.CommandNotSupported',
|
||||
'SOCKSReply.AddressTypeNotSupported'
|
||||
][_value];
|
||||
}
|
||||
}
|
||||
|
||||
class SOCKSRequest {
|
||||
final int version = SOCKSVersion;
|
||||
final SOCKSCommand command;
|
||||
final SOCKSAddressType addressType;
|
||||
final Uint8List address;
|
||||
final int port;
|
||||
|
||||
String getAddressString() {
|
||||
if (addressType == SOCKSAddressType.Domain) {
|
||||
return AsciiDecoder().convert(address);
|
||||
} else if (addressType == SOCKSAddressType.IPv4) {
|
||||
return address.join(".");
|
||||
} else if (addressType == SOCKSAddressType.IPv6) {
|
||||
var ret = List<String>();
|
||||
for (var x = 0; x < address.length; x += 2) {
|
||||
ret.add(
|
||||
"${address[x].toRadixString(16).padLeft(2, "0")}${address[x + 1].toRadixString(16).padLeft(2, "0")}");
|
||||
}
|
||||
return ret.join(":");
|
||||
}
|
||||
return null;
|
||||
}
|
||||
|
||||
SOCKSRequest({
|
||||
this.command,
|
||||
this.addressType,
|
||||
this.address,
|
||||
this.port,
|
||||
});
|
||||
}
|
||||
|
||||
class SOCKSSocket {
|
||||
List<AuthMethods> _auth;
|
||||
RawSocket _sock;
|
||||
SOCKSRequest _request;
|
||||
|
||||
StreamSubscription<RawSocketEvent> _sockSub;
|
||||
StreamSubscription<RawSocketEvent> get subscription => _sockSub;
|
||||
|
||||
SOCKSState _state;
|
||||
final StreamController<SOCKSState> _stateStream =
|
||||
StreamController<SOCKSState>();
|
||||
SOCKSState get state => _state;
|
||||
Stream<SOCKSState> get stateStream => _stateStream?.stream;
|
||||
|
||||
/// For username:password auth
|
||||
final String username;
|
||||
final String password;
|
||||
|
||||
/// Waits for state to change to [SOCKSState.Connected]
|
||||
/// If the connection request returns an error from the
|
||||
/// socks server it will be thrown as an exception in the stream
|
||||
///
|
||||
///
|
||||
Future<SOCKSState> get _waitForConnect =>
|
||||
stateStream.firstWhere((a) => a == SOCKSState.Connected);
|
||||
|
||||
SOCKSSocket(
|
||||
RawSocket socket, {
|
||||
List<AuthMethods> auth = const [AuthMethods.NoAuth],
|
||||
this.username,
|
||||
this.password,
|
||||
}) {
|
||||
_sock = socket;
|
||||
_auth = auth;
|
||||
_setState(SOCKSState.Starting);
|
||||
}
|
||||
|
||||
void _setState(SOCKSState ns) {
|
||||
_state = ns;
|
||||
_stateStream.add(ns);
|
||||
}
|
||||
|
||||
/// Issue connect command to proxy
|
||||
///
|
||||
Future connect(String domain) async {
|
||||
final ds = domain.split(':');
|
||||
assert(ds.length == 2, "Domain must contain port, example.com:80");
|
||||
|
||||
_request = SOCKSRequest(
|
||||
command: SOCKSCommand.Connect,
|
||||
addressType: SOCKSAddressType.Domain,
|
||||
address: AsciiEncoder().convert(ds[0]).sublist(0, ds[0].length),
|
||||
port: int.tryParse(ds[1]) ?? 80,
|
||||
);
|
||||
await _start();
|
||||
await _waitForConnect;
|
||||
}
|
||||
|
||||
Future connectIp(InternetAddress ip, int port) async {
|
||||
_request = SOCKSRequest(
|
||||
command: SOCKSCommand.Connect,
|
||||
addressType: ip.type == InternetAddressType.IPv4
|
||||
? SOCKSAddressType.IPv4
|
||||
: SOCKSAddressType.IPv6,
|
||||
address: ip.rawAddress,
|
||||
port: port,
|
||||
);
|
||||
await _start();
|
||||
await _waitForConnect;
|
||||
}
|
||||
|
||||
Future close({bool keepOpen = true}) async {
|
||||
await _stateStream.close();
|
||||
if (!keepOpen) {
|
||||
await _sock.close();
|
||||
}
|
||||
}
|
||||
|
||||
Future _start() async {
|
||||
// send auth methods
|
||||
_setState(SOCKSState.Auth);
|
||||
//print(">> Version: 5, AuthMethods: $_auth");
|
||||
_sock.write([
|
||||
0x05,
|
||||
_auth.length,
|
||||
..._auth.map((v) => v._value),
|
||||
]);
|
||||
|
||||
_sockSub = _sock.listen((RawSocketEvent ev) {
|
||||
switch (ev) {
|
||||
case RawSocketEvent.read:
|
||||
{
|
||||
final have = _sock.available();
|
||||
final data = _sock.read(have);
|
||||
_handleRead(data);
|
||||
break;
|
||||
}
|
||||
case RawSocketEvent.closed:
|
||||
{
|
||||
_sockSub.cancel();
|
||||
break;
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
void _sendUsernamePassword(String uname, String password) {
|
||||
if (uname.length > 255 || password.length > 255) {
|
||||
throw "Username or Password is too long";
|
||||
}
|
||||
|
||||
final data = [
|
||||
RFC1929Version,
|
||||
uname.length,
|
||||
...AsciiEncoder().convert(uname),
|
||||
password.length,
|
||||
...AsciiEncoder().convert(password)
|
||||
];
|
||||
|
||||
//print(">> Sending $username:$password");
|
||||
_sock.write(data);
|
||||
}
|
||||
|
||||
void _handleRead(Uint8List data) async {
|
||||
if (state == SOCKSState.Auth) {
|
||||
if (data.length == 2) {
|
||||
final version = data[0];
|
||||
final auth = AuthMethods._(data[1]);
|
||||
|
||||
//print("<< Version: $version, Auth: $auth");
|
||||
|
||||
if (auth._value == AuthMethods.UsernamePassword._value) {
|
||||
_setState(SOCKSState.AuthStarted);
|
||||
_sendUsernamePassword(username, password);
|
||||
} else if (auth._value == AuthMethods.NoAuth._value) {
|
||||
_setState(SOCKSState.RequestReady);
|
||||
_writeRequest(_request);
|
||||
} else if (auth._value == AuthMethods.NoAcceptableMethods._value) {
|
||||
throw "No auth methods acceptable";
|
||||
}
|
||||
} else {
|
||||
throw "Expected 2 bytes";
|
||||
}
|
||||
} else if (_state == SOCKSState.AuthStarted) {
|
||||
if (_auth.contains(AuthMethods.UsernamePassword)) {
|
||||
final version = data[0];
|
||||
final status = data[1];
|
||||
|
||||
if (version != RFC1929Version || status != 0x00) {
|
||||
throw "Invalid username or password";
|
||||
} else {
|
||||
_setState(SOCKSState.RequestReady);
|
||||
_writeRequest(_request);
|
||||
}
|
||||
}
|
||||
} else if (_state == SOCKSState.RequestReady) {
|
||||
if (data.length >= 10) {
|
||||
final version = data[0];
|
||||
final reply = SOCKSReply._(data[1]);
|
||||
//data[2] reserved
|
||||
final addrType = SOCKSAddressType._(data[3]);
|
||||
Uint8List addr;
|
||||
var port = 0;
|
||||
|
||||
if (addrType == SOCKSAddressType.Domain) {
|
||||
final len = data[4];
|
||||
addr = data.sublist(5, 5 + len);
|
||||
port = data[5 + len] << 8 | data[6 + len];
|
||||
} else if (addrType == SOCKSAddressType.IPv4) {
|
||||
addr = data.sublist(5, 9);
|
||||
port = data[9] << 8 | data[10];
|
||||
} else if (addrType == SOCKSAddressType.IPv6) {
|
||||
addr = data.sublist(5, 21);
|
||||
port = data[21] << 8 | data[22];
|
||||
}
|
||||
|
||||
//print("<< Version: $version, Reply: $reply, AddrType: $addrType, Addr: $addr, Port: $port");
|
||||
if (reply._value == SOCKSReply.Success._value) {
|
||||
_setState(SOCKSState.Connected);
|
||||
} else {
|
||||
throw reply;
|
||||
}
|
||||
} else {
|
||||
throw "Expected 10 bytes";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void _writeRequest(SOCKSRequest req) {
|
||||
if (_state == SOCKSState.RequestReady) {
|
||||
final data = [
|
||||
req.version,
|
||||
req.command._value,
|
||||
0x00,
|
||||
req.addressType._value,
|
||||
if (req.addressType == SOCKSAddressType.Domain)
|
||||
req.address.lengthInBytes,
|
||||
...req.address,
|
||||
req.port >> 8,
|
||||
req.port & 0xF0,
|
||||
];
|
||||
|
||||
//print(">> Version: ${req.version}, Command: ${req.command}, AddrType: ${req.addressType}, Addr: ${req.getAddressString()}, Port: ${req.port}");
|
||||
_sock.write(data);
|
||||
} else {
|
||||
throw "Must be in RequestReady state, current state $_state";
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue