216 lines
7.7 KiB
PHP
216 lines
7.7 KiB
PHP
<?php
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/**
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* Socks5 stream wrapper.
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*
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* This file is part of MadelineProto.
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* MadelineProto is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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* MadelineProto 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.
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* See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU General Public License along with MadelineProto.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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* @copyright 2016-2020 Daniil Gentili <daniil@daniil.it>
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* @license https://opensource.org/licenses/AGPL-3.0 AGPLv3
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*
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* @link https://docs.madelineproto.xyz MadelineProto documentation
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*/
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namespace danog\MadelineProto\Stream\Proxy;
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use Amp\Promise;
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use Amp\Socket\ClientTlsContext;
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use Amp\Socket\EncryptableSocket;
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use danog\MadelineProto\Stream\Async\RawStream;
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use danog\MadelineProto\Stream\BufferedProxyStreamInterface;
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use danog\MadelineProto\Stream\ConnectionContext;
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use danog\MadelineProto\Stream\RawProxyStreamInterface;
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use danog\MadelineProto\Stream\RawStreamInterface;
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/**
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* Socks5 stream wrapper.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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*/
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class SocksProxy implements RawProxyStreamInterface, BufferedProxyStreamInterface
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{
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private const REPS = [0 => 'succeeded', 1 => 'general SOCKS server failure', 2 => 'connection not allowed by ruleset', 3 => 'Network unreachable', 4 => 'Host unreachable', 5 => 'Connection refused', 6 => 'TTL expired', 7 => 'Command not supported', 8 => 'Address type not supported'];
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use RawStream;
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/**
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* Stream.
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*
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* @var RawStreamInterface
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*/
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protected $stream;
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private $extra;
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/**
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* Connect to stream.
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*
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* @param ConnectionContext $ctx The connection context
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*
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* @return \Generator
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*/
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public function connect(ConnectionContext $ctx, string $header = ''): \Generator
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{
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$ctx = $ctx->getCtx();
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$uri = $ctx->getUri();
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$secure = $ctx->isSecure();
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if ($secure) {
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$ctx->setSocketContext($ctx->getSocketContext()->withTlsContext(new ClientTlsContext($uri->getHost())));
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}
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$ctx->setUri('tcp://'.$this->extra['address'].':'.$this->extra['port'])->secure(false);
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$methods = \chr(0);
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if (isset($this->extra['username']) && isset($this->extra['password'])) {
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$methods .= \chr(2);
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}
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$this->stream = (yield from $ctx->getStream(\chr(5).\chr(\strlen($methods)).$methods));
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$l = 2;
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$buffer = yield $this->stream->getReadBuffer($l);
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$version = \ord(yield $buffer->bufferRead(1));
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$method = \ord(yield $buffer->bufferRead(1));
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if ($version !== 5) {
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throw new \danog\MadelineProto\Exception("Wrong SOCKS5 version: {$version}");
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}
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if ($method === 2) {
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$auth = \chr(1).\chr(\strlen($this->extra['username'])).$this->extra['username'].\chr(\strlen($this->extra['password'])).$this->extra['password'];
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yield $this->stream->write($auth);
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$buffer = yield $this->stream->getReadBuffer($l);
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$version = \ord(yield $buffer->bufferRead(1));
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$result = \ord(yield $buffer->bufferRead(1));
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if ($version !== 1) {
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throw new \danog\MadelineProto\Exception("Wrong authorized SOCKS version: {$version}");
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}
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if ($result !== 0) {
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throw new \danog\MadelineProto\Exception("Wrong authorization status: {$version}");
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}
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} elseif ($method !== 0) {
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throw new \danog\MadelineProto\Exception("Wrong method: {$method}");
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}
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$payload = \pack('C3', 0x5, 0x1, 0x0);
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try {
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$ip = \inet_pton($uri->getHost());
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$payload .= $ip ? \pack('C1', \strlen($ip) === 4 ? 0x1 : 0x4).$ip : \pack('C2', 0x3, \strlen($uri->getHost())).$uri->getHost();
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} catch (\danog\MadelineProto\Exception $e) {
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$payload .= \pack('C2', 0x3, \strlen($uri->getHost())).$uri->getHost();
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}
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$payload .= \pack('n', $uri->getPort());
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yield $this->stream->write($payload);
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$l = 4;
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$buffer = yield $this->stream->getReadBuffer($l);
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$version = \ord(yield $buffer->bufferRead(1));
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if ($version !== 5) {
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throw new \danog\MadelineProto\Exception("Wrong SOCKS5 version: {$version}");
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}
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$rep = \ord(yield $buffer->bufferRead(1));
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if ($rep !== 0) {
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$rep = self::REPS[$rep] ?? $rep;
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throw new \danog\MadelineProto\Exception("Wrong SOCKS5 rep: {$rep}");
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}
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$rsv = \ord(yield $buffer->bufferRead(1));
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if ($rsv !== 0) {
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throw new \danog\MadelineProto\Exception("Wrong socks5 final RSV: {$rsv}");
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}
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switch (\ord(yield $buffer->bufferRead(1))) {
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case 1:
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$buffer = yield $this->stream->getReadBuffer($l);
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$ip = \inet_ntop(yield $buffer->bufferRead(4));
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break;
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case 4:
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$l = 16;
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$buffer = yield $this->stream->getReadBuffer($l);
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$ip = \inet_ntop(yield $buffer->bufferRead(16));
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break;
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case 3:
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$l = 1;
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$buffer = yield $this->stream->getReadBuffer($l);
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$length = \ord(yield $buffer->bufferRead(1));
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$buffer = yield $this->stream->getReadBuffer($length);
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$ip = yield $buffer->bufferRead($length);
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break;
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}
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$l = 2;
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$buffer = yield $this->stream->getReadBuffer($l);
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$port = \unpack('n', yield $buffer->bufferRead(2))[1];
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\danog\MadelineProto\Logger::log(['Connected to '.$ip.':'.$port.' via socks5']);
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if ($secure) {
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yield $this->getSocket()->setupTls();
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}
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if (\strlen($header)) {
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yield (yield $this->stream->getWriteBuffer(\strlen($header)))->bufferWrite($header);
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}
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}
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/**
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* Async close.
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*
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* @return Promise
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*/
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public function disconnect()
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{
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return $this->stream->disconnect();
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}
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/**
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* Get write buffer asynchronously.
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*
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* @param int $length Length of data that is going to be written to the write buffer
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*
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* @return Promise
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*/
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public function getWriteBuffer(int $length, string $append = ''): Promise
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{
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return $this->stream->getWriteBuffer($length, $append);
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}
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/**
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* Get read buffer asynchronously.
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*
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* @param int $length Length of payload, as detected by this layer
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*
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* @return Promise
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*/
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public function getReadBuffer(&$length): Promise
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{
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return $this->stream->getReadBuffer($length);
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}
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public function read(): Promise
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{
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return $this->stream->read();
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}
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public function write(string $data): Promise
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{
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return $this->stream->write($data);
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}
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/**
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* Sets proxy data.
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*
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* @param array $extra Proxy data
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*
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* @return void
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*/
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public function setExtra($extra)
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{
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$this->extra = $extra;
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}
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/**
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* {@inheritDoc}
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*
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* @return RawStreamInterface
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*/
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public function getStream(): RawStreamInterface
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{
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return $this->stream;
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}
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/**
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* {@inheritdoc}
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*
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* @return EncryptableSocket
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*/
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public function getSocket(): EncryptableSocket
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{
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return $this->stream->getSocket();
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}
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public static function getName(): string
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{
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return __CLASS__;
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}
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}
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