1 | <?php
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2 | /**
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3 | * SOCKS5 proxy connection class
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4 | *
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5 | * PHP version 5
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6 | *
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7 | * LICENSE:
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8 | *
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9 | * Copyright (c) 2008-2012, Alexey Borzov <avb@php.net>
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10 | * All rights reserved.
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11 | *
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12 | * Redistribution and use in source and binary forms, with or without
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13 | * modification, are permitted provided that the following conditions
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14 | * are met:
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15 | *
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16 | * * Redistributions of source code must retain the above copyright
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17 | * notice, this list of conditions and the following disclaimer.
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18 | * * Redistributions in binary form must reproduce the above copyright
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19 | * notice, this list of conditions and the following disclaimer in the
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20 | * documentation and/or other materials provided with the distribution.
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21 | * * The names of the authors may not be used to endorse or promote products
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22 | * derived from this software without specific prior written permission.
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23 | *
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24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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25 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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26 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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27 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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28 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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29 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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30 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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31 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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32 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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35 | *
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36 | * @category HTTP
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37 | * @package HTTP_Request2
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38 | * @author Alexey Borzov <avb@php.net>
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39 | * @license http://opensource.org/licenses/bsd-license.php New BSD License
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40 | * @version SVN: $Id: SOCKS5.php 324953 2012-04-08 07:24:12Z avb $
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41 | * @link http://pear.php.net/package/HTTP_Request2
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42 | */
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43 |
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44 | /** Socket wrapper class used by Socket Adapter */
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45 | require_once 'HTTP/Request2/SocketWrapper.php';
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46 |
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47 | /**
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48 | * SOCKS5 proxy connection class (used by Socket Adapter)
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49 | *
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50 | * @category HTTP
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51 | * @package HTTP_Request2
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52 | * @author Alexey Borzov <avb@php.net>
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53 | * @license http://opensource.org/licenses/bsd-license.php New BSD License
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54 | * @version Release: 2.1.1
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55 | * @link http://pear.php.net/package/HTTP_Request2
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56 | * @link http://pear.php.net/bugs/bug.php?id=19332
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57 | * @link http://tools.ietf.org/html/rfc1928
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58 | */
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59 | class HTTP_Request2_SOCKS5 extends HTTP_Request2_SocketWrapper
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60 | {
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61 | /**
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62 | * Constructor, tries to connect and authenticate to a SOCKS5 proxy
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63 | *
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64 | * @param string $address Proxy address, e.g. 'tcp://localhost:1080'
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65 | * @param int $timeout Connection timeout (seconds)
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66 | * @param array $sslOptions SSL context options
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67 | * @param string $username Proxy user name
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68 | * @param string $password Proxy password
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69 | *
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70 | * @throws HTTP_Request2_LogicException
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71 | * @throws HTTP_Request2_ConnectionException
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72 | * @throws HTTP_Request2_MessageException
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73 | */
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74 | public function __construct(
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75 | $address, $timeout = 10, array $sslOptions = array(),
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76 | $username = null, $password = null
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77 | ) {
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78 | parent::__construct($address, $timeout, $sslOptions);
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79 |
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80 | if (strlen($username)) {
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81 | $request = pack('C4', 5, 2, 0, 2);
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82 | } else {
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83 | $request = pack('C3', 5, 1, 0);
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84 | }
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85 | $this->write($request);
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86 | $response = unpack('Cversion/Cmethod', $this->read(3));
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87 | if (5 != $response['version']) {
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88 | throw new HTTP_Request2_MessageException(
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89 | 'Invalid version received from SOCKS5 proxy: ' . $response['version'],
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90 | HTTP_Request2_Exception::MALFORMED_RESPONSE
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91 | );
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92 | }
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93 | switch ($response['method']) {
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94 | case 2:
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95 | $this->performAuthentication($username, $password);
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96 | case 0:
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97 | break;
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98 | default:
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99 | throw new HTTP_Request2_ConnectionException(
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100 | "Connection rejected by proxy due to unsupported auth method"
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101 | );
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102 | }
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103 | }
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104 |
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105 | /**
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106 | * Performs username/password authentication for SOCKS5
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107 | *
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108 | * @param string $username Proxy user name
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109 | * @param string $password Proxy password
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110 | *
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111 | * @throws HTTP_Request2_ConnectionException
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112 | * @throws HTTP_Request2_MessageException
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113 | * @link http://tools.ietf.org/html/rfc1929
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114 | */
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115 | protected function performAuthentication($username, $password)
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116 | {
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117 | $request = pack('C2', 1, strlen($username)) . $username
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118 | . pack('C', strlen($password)) . $password;
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119 |
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120 | $this->write($request);
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121 | $response = unpack('Cvn/Cstatus', $this->read(3));
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122 | if (1 != $response['vn'] || 0 != $response['status']) {
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123 | throw new HTTP_Request2_ConnectionException(
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124 | 'Connection rejected by proxy due to invalid username and/or password'
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125 | );
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126 | }
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127 | }
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128 |
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129 | /**
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130 | * Connects to a remote host via proxy
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131 | *
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132 | * @param string $remoteHost Remote host
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133 | * @param int $remotePort Remote port
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134 | *
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135 | * @throws HTTP_Request2_ConnectionException
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136 | * @throws HTTP_Request2_MessageException
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137 | */
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138 | public function connect($remoteHost, $remotePort)
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139 | {
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140 | $request = pack('C5', 0x05, 0x01, 0x00, 0x03, strlen($remoteHost))
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141 | . $remoteHost . pack('n', $remotePort);
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142 |
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143 | $this->write($request);
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144 | $response = unpack('Cversion/Creply/Creserved', $this->read(1024));
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145 | if (5 != $response['version'] || 0 != $response['reserved']) {
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146 | throw new HTTP_Request2_MessageException(
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147 | 'Invalid response received from SOCKS5 proxy',
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148 | HTTP_Request2_Exception::MALFORMED_RESPONSE
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149 | );
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150 | } elseif (0 != $response['reply']) {
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151 | throw new HTTP_Request2_ConnectionException(
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152 | "Unable to connect to {$remoteHost}:{$remotePort} through SOCKS5 proxy",
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153 | 0, $response['reply']
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154 | );
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155 | }
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156 | }
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157 | }
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158 | ?> |
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