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1 #!/usr/bin/python |
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2 #-*- coding: utf-8 -*- |
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3 """ |
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4 SAT plugin for managing xep-0065 |
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5 |
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6 Copyright (C) |
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7 2002-2004 Dave Smith (dizzyd@jabber.org) |
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8 2007-2008 Fabio Forno (xmpp:ff@jabber.bluendo.com) |
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9 2009 Jérôme Poisson (goffi@goffi.org) |
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10 |
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11 This program is free software: you can redistribute it and/or modify |
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12 it under the terms of the GNU General Public License as published by |
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13 the Free Software Foundation, either version 3 of the License, or |
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14 (at your option) any later version. |
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15 |
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16 This program is distributed in the hope that it will be useful, |
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17 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 GNU General Public License for more details. |
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20 |
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21 You should have received a copy of the GNU General Public License |
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22 along with this program. If not, see <http://www.gnu.org/licenses/>. |
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23 |
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24 -- |
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25 |
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26 This program is based on proxy65 (http://code.google.com/p/proxy65), |
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27 originaly written by David Smith and modified by Fabio Forno. |
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28 It is sublicensed under GPL v3 (or any later version) as allowed by the original |
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29 license. |
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30 |
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31 -- |
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32 |
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33 Here is a copy of the original license: |
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34 |
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35 Copyright (C) |
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36 2002-2004 Dave Smith (dizzyd@jabber.org) |
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37 2007-2008 Fabio Forno (xmpp:ff@jabber.bluendo.com) |
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38 |
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39 Permission is hereby granted, free of charge, to any person obtaining a copy |
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40 of this software and associated documentation files (the "Software"), to deal |
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41 in the Software without restriction, including without limitation the rights |
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42 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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43 copies of the Software, and to permit persons to whom the Software is |
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44 furnished to do so, subject to the following conditions: |
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45 |
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46 The above copyright notice and this permission notice shall be included in |
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47 all copies or substantial portions of the Software. |
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48 |
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49 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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50 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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51 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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52 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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53 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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54 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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55 THE SOFTWARE. |
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56 """ |
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57 |
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58 from logging import debug, info, error |
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59 from twisted.internet import protocol, reactor |
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60 from twisted.protocols.basic import FileSender |
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61 from twisted.words.xish import domish |
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62 import struct |
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63 from binascii import hexlify |
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64 import hashlib, pdb |
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65 |
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66 |
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67 PLUGIN_INFO = { |
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68 "name": "XEP 0065 Plugin", |
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69 "import_name": "XEP_0065", |
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70 "type": "XEP", |
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71 "main": "XEP_0065", |
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72 "description": """Implementation of SI File Transfert""" |
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73 } |
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74 |
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75 STATE_INITIAL = 0 |
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76 STATE_AUTH = 1 |
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77 STATE_REQUEST = 2 |
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78 STATE_READY = 3 |
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79 STATE_AUTH_USERPASS = 4 |
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80 STATE_TARGET_INITIAL = 5 |
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81 STATE_TARGET_AUTH = 6 |
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82 STATE_TARGET_REQUEST = 7 |
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83 STATE_TARGET_READY = 8 |
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84 STATE_LAST = 9 |
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85 |
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86 STATE_CONNECT_PENDING = STATE_LAST + 1 |
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87 |
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88 SOCKS5_VER = 0x05 |
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89 |
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90 ADDR_IPV4 = 0x01 |
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91 ADDR_DOMAINNAME = 0x03 |
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92 ADDR_IPV6 = 0x04 |
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93 |
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94 CMD_CONNECT = 0x01 |
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95 CMD_BIND = 0x02 |
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96 CMD_UDPASSOC = 0x03 |
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97 |
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98 AUTHMECH_ANON = 0x00 |
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99 AUTHMECH_USERPASS = 0x02 |
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100 AUTHMECH_INVALID = 0xFF |
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101 |
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102 REPLY_SUCCESS = 0x00 |
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103 REPLY_GENERAL_FAILUR = 0x01 |
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104 REPLY_CONN_NOT_ALLOWED = 0x02 |
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105 REPLY_NETWORK_UNREACHABLE = 0x03 |
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106 REPLY_HOST_UNREACHABLE = 0x04 |
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107 REPLY_CONN_REFUSED = 0x05 |
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108 REPLY_TTL_EXPIRED = 0x06 |
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109 REPLY_CMD_NOT_SUPPORTED = 0x07 |
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110 REPLY_ADDR_NOT_SUPPORTED = 0x08 |
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111 |
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112 |
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113 |
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114 |
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115 |
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116 class SOCKSv5(protocol.Protocol, FileSender): |
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117 def __init__(self): |
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118 debug("Protocol init") |
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119 self.state = STATE_INITIAL |
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120 self.buf = "" |
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121 self.supportedAuthMechs = [ AUTHMECH_ANON ] |
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122 self.supportedAddrs = [ ADDR_DOMAINNAME ] |
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123 self.enabledCommands = [ CMD_CONNECT ] |
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124 self.peersock = None |
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125 self.addressType = 0 |
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126 self.requestType = 0 |
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127 self.activeConns = {} |
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128 self.pendingConns = {} |
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129 self.transfered = 0 #nb of bytes already copied |
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130 |
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131 def _startNegotiation(self): |
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132 debug("_startNegotiation") |
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133 self.state = STATE_TARGET_AUTH |
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134 self.transport.write(struct.pack('!3B', SOCKS5_VER, 1, AUTHMECH_ANON)) |
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135 |
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136 def _parseNegotiation(self): |
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137 debug("_parseNegotiation") |
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138 try: |
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139 # Parse out data |
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140 ver, nmethod = struct.unpack('!BB', self.buf[:2]) |
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141 methods = struct.unpack('%dB' % nmethod, self.buf[2:nmethod+2]) |
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142 |
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143 # Ensure version is correct |
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144 if ver != 5: |
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145 self.transport.write(struct.pack('!BB', SOCKS5_VER, AUTHMECH_INVALID)) |
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146 self.transport.loseConnection() |
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147 return |
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148 |
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149 # Trim off front of the buffer |
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150 self.buf = self.buf[nmethod+2:] |
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151 |
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152 # Check for supported auth mechs |
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153 for m in self.supportedAuthMechs: |
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154 if m in methods: |
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155 # Update internal state, according to selected method |
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156 if m == AUTHMECH_ANON: |
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157 self.state = STATE_REQUEST |
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158 elif m == AUTHMECH_USERPASS: |
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159 self.state = STATE_AUTH_USERPASS |
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160 # Complete negotiation w/ this method |
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161 self.transport.write(struct.pack('!BB', SOCKS5_VER, m)) |
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162 return |
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163 |
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164 # No supported mechs found, notify client and close the connection |
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165 self.transport.write(struct.pack('!BB', SOCKS5_VER, AUTHMECH_INVALID)) |
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166 self.transport.loseConnection() |
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167 except struct.error: |
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168 pass |
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169 |
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170 def _parseUserPass(self): |
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171 debug("_parseUserPass") |
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172 try: |
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173 # Parse out data |
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174 ver, ulen = struct.unpack('BB', self.buf[:2]) |
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175 uname, = struct.unpack('%ds' % ulen, self.buf[2:ulen + 2]) |
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176 plen, = struct.unpack('B', self.buf[ulen + 2]) |
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177 password, = struct.unpack('%ds' % plen, self.buf[ulen + 3:ulen + 3 + plen]) |
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178 # Trim off fron of the buffer |
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179 self.buf = self.buf[3 + ulen + plen:] |
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180 # Fire event to authenticate user |
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181 if self.authenticateUserPass(uname, password): |
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182 # Signal success |
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183 self.state = STATE_REQUEST |
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184 self.transport.write(struct.pack('!BB', SOCKS5_VER, 0x00)) |
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185 else: |
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186 # Signal failure |
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187 self.transport.write(struct.pack('!BB', SOCKS5_VER, 0x01)) |
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188 self.transport.loseConnection() |
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189 except struct.error: |
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190 pass |
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191 |
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192 def sendErrorReply(self, errorcode): |
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193 debug("sendErrorReply") |
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194 # Any other address types are not supported |
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195 result = struct.pack('!BBBBIH', SOCKS5_VER, errorcode, 0, 1, 0, 0) |
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196 self.transport.write(result) |
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197 self.transport.loseConnection() |
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198 |
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199 def addConnection(self, address, connection): |
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200 info("Adding connection: %s, %s", address, connection) |
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201 olist = self.pendingConns.get(address, []) |
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202 if len(olist) <= 1: |
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203 olist.append(connection) |
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204 self.pendingConns[address] = olist |
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205 return True |
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206 else: |
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207 return False |
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208 |
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209 def removePendingConnection(self, address, connection): |
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210 olist = self.pendingConns[address] |
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211 if len(olist) == 1: |
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212 del self.pendingConns[address] |
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213 else: |
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214 olist.remove(connection) |
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215 self.pendingConns[address] = olist |
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216 |
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217 def removeActiveConnection(self, address): |
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218 del self.activeConns[address] |
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219 |
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220 def _parseRequest(self): |
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221 debug("_parseRequest") |
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222 try: |
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223 # Parse out data and trim buffer accordingly |
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224 ver, cmd, rsvd, self.addressType = struct.unpack('!BBBB', self.buf[:4]) |
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225 |
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226 # Ensure we actually support the requested address type |
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227 if self.addressType not in self.supportedAddrs: |
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228 self.sendErrorReply(REPLY_ADDR_NOT_SUPPORTED) |
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229 return |
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230 |
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231 # Deal with addresses |
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232 if self.addressType == ADDR_IPV4: |
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233 addr, port = struct.unpack('!IH', self.buf[4:10]) |
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234 self.buf = self.buf[10:] |
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235 elif self.addressType == ADDR_DOMAINNAME: |
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236 nlen = ord(self.buf[4]) |
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237 addr, port = struct.unpack('!%dsH' % nlen, self.buf[5:]) |
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238 self.buf = self.buf[7 + len(addr):] |
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239 else: |
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240 # Any other address types are not supported |
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241 self.sendErrorReply(REPLY_ADDR_NOT_SUPPORTED) |
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242 return |
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243 |
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244 # Ensure command is supported |
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245 if cmd not in self.enabledCommands: |
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246 # Send a not supported error |
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247 self.sendErrorReply(REPLY_CMD_NOT_SUPPORTED) |
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248 return |
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249 |
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250 # Process the command |
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251 if cmd == CMD_CONNECT: |
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252 self.connectRequested(addr, port) |
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253 elif cmd == CMD_BIND: |
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254 self.bindRequested(addr, port) |
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255 else: |
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256 # Any other command is not supported |
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257 self.sendErrorReply(REPLY_CMD_NOT_SUPPORTED) |
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258 |
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259 except struct.error, why: |
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260 return None |
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261 |
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262 def _makeRequest(self): |
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263 debug("_makeRequest") |
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264 self.state = STATE_TARGET_REQUEST |
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265 sha1 = hashlib.sha1(self.sid + self.initiator_jid + self.target_jid).hexdigest() |
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266 request = struct.pack('!5B%dsH' % len(sha1), SOCKS5_VER, CMD_CONNECT, 0, ADDR_DOMAINNAME, len(sha1), sha1, 0) |
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267 self.transport.write(request) |
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268 |
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269 def _parseRequestReply(self): |
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270 debug("_parseRequestReply") |
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271 try: |
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272 ver, rep, rsvd, self.addressType = struct.unpack('!BBBB', self.buf[:4]) |
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273 # Ensure we actually support the requested address type |
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274 if self.addressType not in self.supportedAddrs: |
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275 self.sendErrorReply(REPLY_ADDR_NOT_SUPPORTED) |
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276 return |
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277 |
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278 # Deal with addresses |
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279 if self.addressType == ADDR_IPV4: |
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280 addr, port = struct.unpack('!IH', self.buf[4:10]) |
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281 self.buf = self.buf[10:] |
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282 elif self.addressType == ADDR_DOMAINNAME: |
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283 nlen = ord(self.buf[4]) |
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284 addr, port = struct.unpack('!%dsH' % nlen, self.buf[5:]) |
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285 self.buf = self.buf[7 + len(addr):] |
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286 else: |
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287 # Any other address types are not supported |
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288 self.sendErrorReply(REPLY_ADDR_NOT_SUPPORTED) |
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289 return |
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290 |
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291 # Ensure reply is OK |
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292 if rep != REPLY_SUCCESS: |
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293 self.loseConnection() |
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294 return |
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295 |
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296 debug("Saving file in %s.", self.data["dest_path"]) |
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297 self.dest_file = open(self.data["dest_path"], 'w') |
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298 self.state = STATE_TARGET_READY |
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299 self.activateCB(self.target_jid, self.initiator_jid, self.sid, self.IQ_id) |
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300 |
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301 |
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302 except struct.error, why: |
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303 return None |
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304 |
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305 def connectionMade(self): |
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306 debug("connectionMade (mode = %s)" % self.mode) |
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307 self.host.registerProgressCB(self.transfert_id, self.getProgress) |
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308 |
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309 if self.mode == "target": |
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310 self.state = STATE_TARGET_INITIAL |
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311 self._startNegotiation() |
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312 |
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313 def connectRequested(self, addr, port): |
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314 debug(("connectRequested")) |
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315 # Check for special connect to the namespace -- this signifies that the client |
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316 # is just checking to ensure it can connect to the streamhost |
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317 if addr == "http://jabber.org/protocol/bytestreams": |
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318 self.connectCompleted(addr, 0) |
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319 self.transport.loseConnection() |
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320 return |
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321 |
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322 # Save addr, for cleanup |
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323 self.addr = addr |
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324 |
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325 # Check to see if the requested address is already |
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326 # activated -- send an error if so |
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327 if addr in self.activeConns: |
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328 self.sendErrorReply(socks5.REPLY_CONN_NOT_ALLOWED) |
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329 return |
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330 |
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331 # Add this address to the pending connections |
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332 if self.addConnection(addr, self): |
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333 self.connectCompleted(addr, 0) |
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334 self.transport.stopReading() |
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335 else: |
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336 self.sendErrorReply(socks5.REPLY_CONN_REFUSED) |
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337 |
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338 def getProgress(self, data): |
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339 """Fill data with position of current transfert""" |
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340 data["size"] = self.filesize |
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341 try: |
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342 data["position"] = str(self.dest_file.tell()) |
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343 except (ValueError, AttributeError): |
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344 data["position"] = "" |
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345 |
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346 def fileTransfered(self, d): |
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347 info("File transfer completed, closing connection") |
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348 self.transport.loseConnection() |
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349 |
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350 def updateTransfered(self, data): |
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351 self.transfered+=len(data) |
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352 return data |
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353 |
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354 def connectCompleted(self, remotehost, remoteport): |
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355 debug("connectCompleted") |
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356 if self.addressType == ADDR_IPV4: |
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357 result = struct.pack('!BBBBIH', SOCKS5_VER, REPLY_SUCCESS, 0, 1, remotehost, remoteport) |
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358 elif self.addressType == ADDR_DOMAINNAME: |
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359 result = struct.pack('!BBBBB%dsH' % len(remotehost), SOCKS5_VER, REPLY_SUCCESS, 0, |
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360 ADDR_DOMAINNAME, len(remotehost), remotehost, remoteport) |
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361 self.transport.write(result) |
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362 self.state = STATE_READY |
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363 self.dest_file=open(self.filepath) |
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364 d=self.beginFileTransfer(self.dest_file, self.transport, self.updateTransfered) |
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365 d.addCallback(self.fileTransfered) |
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366 |
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367 def bindRequested(self, addr, port): |
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368 pass |
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369 |
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370 def authenticateUserPass(self, user, passwd): |
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371 debug("User/pass: %s/%s", user, passwd) |
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372 return True |
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373 |
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374 def dataReceived(self, buf): |
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375 if self.state == STATE_TARGET_READY: |
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376 self.dest_file.write(buf) |
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377 self.transfered+=len(buf) |
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378 return |
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379 |
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380 self.buf = self.buf + buf |
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381 if self.state == STATE_INITIAL: |
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382 self._parseNegotiation() |
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383 if self.state == STATE_AUTH_USERPASS: |
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384 self._parseUserPass() |
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385 if self.state == STATE_REQUEST: |
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386 self._parseRequest() |
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387 if self.state == STATE_TARGET_AUTH: |
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388 ver, method = struct.unpack('!BB', buf) |
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389 self.buf = self.buf[2:] |
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390 if ver!=SOCKS5_VER or method!=AUTHMECH_ANON: |
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391 self.transport.loseConnection() |
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392 else: |
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393 self._makeRequest() |
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394 if self.state == STATE_TARGET_REQUEST: |
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395 self._parseRequestReply() |
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396 |
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397 |
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398 def clientConnectionLost(self, reason): |
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399 debug("clientConnectionLost") |
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400 self.transport.loseConnection() |
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401 |
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402 def connectionLost(self, reason): |
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403 debug("connectionLost") |
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404 self.host.removeProgressCB(self.transfert_id) |
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405 if self.state == STATE_CONNECT_PENDING: |
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406 self.removePendingConnection(self.addr, self) |
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407 else: |
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408 self.transport.unregisterProducer() |
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409 if self.peersock != None: |
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410 self.peersock.peersock = None |
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411 self.peersock.transport.unregisterProducer() |
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412 self.peersock = None |
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413 self.removeActiveConnection(self.addr) |
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414 |
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415 class Socks5ServerFactory(protocol.ServerFactory): |
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416 protocol = SOCKSv5 |
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417 protocol.mode = "initiator" #FIXME: Q&D way, fix it |
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418 |
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419 |
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420 def startedConnecting(self, connector): |
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421 debug ("Socks 5 server connection started") |
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422 |
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423 def clientConnectionLost(self, connector, reason): |
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424 debug ("Socks 5 server connection lost (reason: %s)", reason) |
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425 |
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426 class Socks5ClientFactory(protocol.ClientFactory): |
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427 protocol = SOCKSv5 |
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428 protocol.mode = "target" #FIXME: Q&D way, fix it |
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429 |
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430 def startedConnecting(self, connector): |
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431 debug ("Socks 5 client connection started") |
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432 |
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433 def clientConnectionLost(self, connector, reason): |
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434 debug ("Socks 5 client connection lost (reason: %s)", reason) |
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435 |
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436 |
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437 class XEP_0065(): |
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438 def __init__(self, host): |
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439 info("Plugin XEP_0065 initialization") |
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440 self.host = host |
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441 debug("registering") |
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442 self.server_factory = Socks5ServerFactory() |
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443 self.server_factory.protocol.host = self.host #needed for progress CB |
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444 self.client_factory = Socks5ClientFactory() |
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445 host.add_IQ_cb("http://jabber.org/protocol/bytestreams", self.getFile) |
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446 port = int(self.host.memory.getParamV("Port", "File Transfert")) |
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447 info("Launching Socks5 Stream server on port %d", port) |
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448 reactor.listenTCP(port, self.server_factory) |
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449 |
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450 def setData(self, data, id): |
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451 self.data = data |
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452 self.transfert_id = id |
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453 |
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454 def sendFile(self, id, filepath, size): |
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455 #lauching socks5 initiator |
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456 self.server_factory.protocol.mode = "initiator" |
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457 self.server_factory.protocol.filepath = filepath |
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458 self.server_factory.protocol.filesize = size |
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459 self.server_factory.protocol.transfert_id = id |
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460 |
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461 def getFile(self, stanza): |
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462 """Get file using byte stream""" |
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463 SI_elem = stanza.firstChildElement() |
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464 IQ_id = stanza['id'] |
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465 for element in SI_elem.elements(): |
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466 if element.name == "streamhost": |
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467 info ("Stream proposed: host=[%s] port=[%s]", element['host'], element['port']) |
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468 factory = self.client_factory |
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469 self.server_factory.protocol.mode = "target" |
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470 factory.protocol.host = self.host #needed for progress CB |
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471 factory.protocol.data = self.data |
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472 factory.protocol.transfert_id = self.transfert_id |
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473 factory.protocol.filesize = self.data["size"] |
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474 factory.protocol.sid = SI_elem['sid'] |
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475 factory.protocol.initiator_jid = element['jid'] |
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476 factory.protocol.target_jid = self.host.me.full() |
|
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477 factory.protocol.IQ_id = IQ_id |
|
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478 factory.protocol.activateCB = self.activateStream |
|
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479 reactor.connectTCP(element['host'], int(element['port']), factory) |
|
|
480 |
|
|
481 def activateStream(self, from_jid, to_jid, sid, IQ_id): |
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482 debug("activating stream") |
|
|
483 result = domish.Element(('', 'iq')) |
|
|
484 result['type'] = 'result' |
|
|
485 result['id'] = IQ_id |
|
|
486 result['from'] = from_jid |
|
|
487 result['to'] = to_jid |
|
|
488 query = result.addElement('query', 'http://jabber.org/protocol/bytestreams') |
|
|
489 query['sid'] = sid |
|
|
490 streamhost = query.addElement('streamhost-used') |
|
|
491 streamhost['jid'] = to_jid #FIXME: use real streamhost |
|
|
492 self.host.xmlstream.send(result) |
|
|
493 |
