1 | <?php |
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2 | /*********************************************** |
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3 | * File : request.php |
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4 | * Project : Z-Push |
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5 | * Descr : This class checks and processes |
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6 | * all incoming data of the request. |
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7 | * |
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8 | * Created : 01.10.2007 |
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9 | * |
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10 | * Copyright 2007 - 2012 Zarafa Deutschland GmbH |
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11 | * |
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12 | * This program is free software: you can redistribute it and/or modify |
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13 | * it under the terms of the GNU Affero General Public License, version 3, |
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14 | * as published by the Free Software Foundation with the following additional |
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15 | * term according to sec. 7: |
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16 | * |
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17 | * According to sec. 7 of the GNU Affero General Public License, version 3, |
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18 | * the terms of the AGPL are supplemented with the following terms: |
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19 | * |
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20 | * "Zarafa" is a registered trademark of Zarafa B.V. |
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21 | * "Z-Push" is a registered trademark of Zarafa Deutschland GmbH |
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22 | * The licensing of the Program under the AGPL does not imply a trademark license. |
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23 | * Therefore any rights, title and interest in our trademarks remain entirely with us. |
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24 | * |
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25 | * However, if you propagate an unmodified version of the Program you are |
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26 | * allowed to use the term "Z-Push" to indicate that you distribute the Program. |
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27 | * Furthermore you may use our trademarks where it is necessary to indicate |
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28 | * the intended purpose of a product or service provided you use it in accordance |
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29 | * with honest practices in industrial or commercial matters. |
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30 | * If you want to propagate modified versions of the Program under the name "Z-Push", |
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31 | * you may only do so if you have a written permission by Zarafa Deutschland GmbH |
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32 | * (to acquire a permission please contact Zarafa at trademark@zarafa.com). |
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33 | * |
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34 | * This program is distributed in the hope that it will be useful, |
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35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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37 | * GNU Affero General Public License for more details. |
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38 | * |
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39 | * You should have received a copy of the GNU Affero General Public License |
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40 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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41 | * |
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42 | * Consult LICENSE file for details |
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43 | ************************************************/ |
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44 | |
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45 | class Request { |
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46 | const UNKNOWN = "unknown"; |
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47 | |
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48 | /** |
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49 | * self::filterEvilInput() options |
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50 | */ |
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51 | const LETTERS_ONLY = 1; |
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52 | const HEX_ONLY = 2; |
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53 | const WORDCHAR_ONLY = 3; |
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54 | const NUMBERS_ONLY = 4; |
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55 | const NUMBERSDOT_ONLY = 5; |
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56 | const HEX_EXTENDED = 6; |
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57 | |
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58 | /** |
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59 | * Command parameters for base64 encoded requests (AS >= 12.1) |
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60 | */ |
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61 | const COMMANDPARAM_ATTACHMENTNAME = 0; |
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62 | const COMMANDPARAM_COLLECTIONID = 1; //deprecated |
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63 | const COMMANDPARAM_COLLECTIONNAME = 2; //deprecated |
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64 | const COMMANDPARAM_ITEMID = 3; |
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65 | const COMMANDPARAM_LONGID = 4; |
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66 | const COMMANDPARAM_PARENTID = 5; //deprecated |
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67 | const COMMANDPARAM_OCCURRENCE = 6; |
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68 | const COMMANDPARAM_OPTIONS = 7; //used by SmartReply, SmartForward, SendMail, ItemOperations |
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69 | const COMMANDPARAM_USER = 8; //used by any command |
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70 | //possible bitflags for COMMANDPARAM_OPTIONS |
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71 | const COMMANDPARAM_OPTIONS_SAVEINSENT = 0x01; |
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72 | const COMMANDPARAM_OPTIONS_ACCEPTMULTIPART = 0x02; |
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73 | |
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74 | static private $input; |
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75 | static private $output; |
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76 | static private $headers; |
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77 | static private $getparameters; |
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78 | static private $command; |
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79 | static private $device; |
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80 | static private $method; |
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81 | static private $remoteAddr; |
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82 | static private $getUser; |
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83 | static private $devid; |
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84 | static private $devtype; |
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85 | static private $authUser; |
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86 | static private $authDomain; |
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87 | static private $authPassword; |
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88 | static private $asProtocolVersion; |
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89 | static private $policykey; |
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90 | static private $useragent; |
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91 | static private $attachmentName; |
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92 | static private $collectionId; |
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93 | static private $itemId; |
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94 | static private $longId; //TODO |
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95 | static private $occurence; //TODO |
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96 | static private $saveInSent; |
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97 | static private $acceptMultipart; |
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98 | |
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99 | |
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100 | /** |
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101 | * Initializes request data |
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102 | * |
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103 | * @access public |
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104 | * @return |
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105 | */ |
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106 | static public function Initialize() { |
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107 | // try to open stdin & stdout |
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108 | self::$input = fopen("php://input", "r"); |
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109 | self::$output = fopen("php://output", "w+"); |
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110 | |
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111 | // Parse the standard GET parameters |
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112 | if(isset($_GET["Cmd"])) |
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113 | self::$command = self::filterEvilInput($_GET["Cmd"], self::LETTERS_ONLY); |
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114 | |
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115 | // getUser is unfiltered, as everything is allowed.. even "/", "\" or ".." |
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116 | if(isset($_GET["User"])) |
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117 | self::$getUser = strtolower($_GET["User"]); |
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118 | if(isset($_GET["DeviceId"])) |
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119 | self::$devid = self::filterEvilInput($_GET["DeviceId"], self::WORDCHAR_ONLY); |
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120 | if(isset($_GET["DeviceType"])) |
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121 | self::$devtype = self::filterEvilInput($_GET["DeviceType"], self::LETTERS_ONLY); |
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122 | if (isset($_GET["AttachmentName"])) |
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123 | self::$attachmentName = self::filterEvilInput($_GET["AttachmentName"], self::HEX_EXTENDED); |
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124 | if (isset($_GET["CollectionId"])) |
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125 | self::$collectionId = self::filterEvilInput($_GET["CollectionId"], self::HEX_ONLY); |
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126 | if (isset($_GET["ItemId"])) |
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127 | self::$itemId = self::filterEvilInput($_GET["ItemId"], self::HEX_ONLY); |
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128 | if (isset($_GET["SaveInSent"]) && $_GET["SaveInSent"] == "T") |
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129 | self::$saveInSent = true; |
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130 | |
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131 | if(isset($_SERVER["REQUEST_METHOD"])) |
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132 | self::$method = self::filterEvilInput($_SERVER["REQUEST_METHOD"], self::LETTERS_ONLY); |
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133 | // TODO check IPv6 addresses |
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134 | if(isset($_SERVER["REMOTE_ADDR"])) |
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135 | self::$remoteAddr = self::filterEvilInput($_SERVER["REMOTE_ADDR"], self::NUMBERSDOT_ONLY); |
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136 | |
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137 | // in protocol version > 14 mobile send these inputs as encoded query string |
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138 | if (!isset(self::$command) && !empty($_SERVER['QUERY_STRING']) && Utils::IsBase64String($_SERVER['QUERY_STRING'])) { |
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139 | $query = Utils::DecodeBase64URI($_SERVER['QUERY_STRING']); |
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140 | if (!isset(self::$command) && isset($query['Command'])) |
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141 | self::$command = Utils::GetCommandFromCode($query['Command']); |
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142 | |
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143 | if (!isset(self::$getUser) && isset($query[self::COMMANDPARAM_USER])) |
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144 | self::$getUser = strtolower($query[self::COMMANDPARAM_USER]); |
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145 | |
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146 | if (!isset(self::$devid) && isset($query['DevID'])) |
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147 | self::$devid = self::filterEvilInput($query['DevID'], self::WORDCHAR_ONLY); |
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148 | |
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149 | if (!isset(self::$devtype) && isset($query['DevType'])) |
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150 | self::$devtype = self::filterEvilInput($query['DevType'], self::LETTERS_ONLY); |
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151 | |
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152 | if (isset($query['PolKey'])) |
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153 | self::$policykey = (int) self::filterEvilInput($query['PolKey'], self::NUMBERS_ONLY); |
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154 | |
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155 | if (isset($query['ProtVer'])) |
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156 | self::$asProtocolVersion = self::filterEvilInput($query['ProtVer'], self::NUMBERS_ONLY) / 10; |
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157 | |
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158 | if (isset($query[self::COMMANDPARAM_ATTACHMENTNAME])) |
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159 | self::$attachmentName = self::filterEvilInput($query[self::COMMANDPARAM_ATTACHMENTNAME], self::HEX_EXTENDED); |
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160 | |
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161 | if (isset($query[self::COMMANDPARAM_COLLECTIONID])) |
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162 | self::$collectionId = self::filterEvilInput($query[self::COMMANDPARAM_COLLECTIONID], self::HEX_ONLY); |
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163 | |
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164 | if (isset($query[self::COMMANDPARAM_ITEMID])) |
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165 | self::$itemId = self::filterEvilInput($query[self::COMMANDPARAM_ITEMID], self::HEX_ONLY); |
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166 | |
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167 | if (isset($query[self::COMMANDPARAM_OPTIONS]) && (ord($query[self::COMMANDPARAM_OPTIONS]) & self::COMMANDPARAM_OPTIONS_SAVEINSENT)) |
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168 | self::$saveInSent = true; |
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169 | |
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170 | if (isset($query[self::COMMANDPARAM_OPTIONS]) && (ord($query[self::COMMANDPARAM_OPTIONS]) & self::COMMANDPARAM_OPTIONS_ACCEPTMULTIPART)) |
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171 | self::$acceptMultipart = true; |
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172 | } |
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173 | |
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174 | // in base64 encoded query string user is not necessarily set |
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175 | if (!isset(self::$getUser) && isset($_SERVER['PHP_AUTH_USER'])) |
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176 | list(self::$getUser,) = Utils::SplitDomainUser(strtolower($_SERVER['PHP_AUTH_USER'])); |
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177 | } |
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178 | |
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179 | /** |
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180 | * Reads and processes the request headers |
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181 | * |
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182 | * @access public |
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183 | * @return |
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184 | */ |
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185 | static public function ProcessHeaders() { |
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186 | self::$headers = array_change_key_case(apache_request_headers(), CASE_LOWER); |
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187 | self::$useragent = (isset(self::$headers["user-agent"]))? self::$headers["user-agent"] : self::UNKNOWN; |
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188 | if (!isset(self::$asProtocolVersion)) |
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189 | self::$asProtocolVersion = (isset(self::$headers["ms-asprotocolversion"]))? self::filterEvilInput(self::$headers["ms-asprotocolversion"], self::NUMBERSDOT_ONLY) : ZPush::GetLatestSupportedASVersion(); |
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190 | |
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191 | //if policykey is not yet set, try to set it from the header |
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192 | //the policy key might be set in Request::Initialize from the base64 encoded query |
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193 | if (!isset(self::$policykey)) { |
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194 | if (isset(self::$headers["x-ms-policykey"])) |
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195 | self::$policykey = (int) self::filterEvilInput(self::$headers["x-ms-policykey"], self::NUMBERS_ONLY); |
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196 | else |
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197 | self::$policykey = 0; |
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198 | } |
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199 | |
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200 | if (!empty($_SERVER['QUERY_STRING']) && Utils::IsBase64String($_SERVER['QUERY_STRING'])) { |
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201 | ZLog::Write(LOGLEVEL_DEBUG, "Using data from base64 encoded query string"); |
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202 | if (isset(self::$policykey)) |
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203 | self::$headers["x-ms-policykey"] = self::$policykey; |
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204 | |
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205 | if (isset(self::$asProtocolVersion)) |
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206 | self::$headers["ms-asprotocolversion"] = self::$asProtocolVersion; |
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207 | } |
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208 | |
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209 | if (!isset(self::$acceptMultipart) && isset(self::$headers["ms-asacceptmultipart"]) && strtoupper(self::$headers["ms-asacceptmultipart"]) == "T") { |
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210 | self::$acceptMultipart = true; |
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211 | } |
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212 | |
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213 | ZLog::Write(LOGLEVEL_DEBUG, sprintf("Request::ProcessHeaders() ASVersion: %s", self::$asProtocolVersion)); |
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214 | } |
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215 | |
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216 | /** |
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217 | * Reads and parses the HTTP-Basic-Auth data |
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218 | * |
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219 | * @access public |
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220 | * @return boolean data sent or not |
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221 | */ |
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222 | static public function AuthenticationInfo() { |
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223 | // split username & domain if received as one |
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224 | if (isset($_SERVER['PHP_AUTH_USER'])) { |
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225 | list(self::$authUser, self::$authDomain) = Utils::SplitDomainUser($_SERVER['PHP_AUTH_USER']); |
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226 | self::$authPassword = (isset($_SERVER['PHP_AUTH_PW']))?$_SERVER['PHP_AUTH_PW'] : ""; |
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227 | } |
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228 | // authUser & authPassword are unfiltered! |
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229 | return (self::$authUser != "" && self::$authPassword != ""); |
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230 | } |
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231 | |
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232 | |
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233 | /**---------------------------------------------------------------------------------------------------------- |
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234 | * Getter & Checker |
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235 | */ |
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236 | |
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237 | /** |
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238 | * Returns the input stream |
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239 | * |
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240 | * @access public |
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241 | * @return handle/boolean false if not available |
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242 | */ |
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243 | static public function GetInputStream() { |
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244 | if (isset(self::$input)) |
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245 | return self::$input; |
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246 | else |
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247 | return false; |
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248 | } |
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249 | |
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250 | /** |
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251 | * Returns the output stream |
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252 | * |
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253 | * @access public |
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254 | * @return handle/boolean false if not available |
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255 | */ |
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256 | static public function GetOutputStream() { |
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257 | if (isset(self::$output)) |
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258 | return self::$output; |
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259 | else |
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260 | return false; |
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261 | } |
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262 | |
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263 | /** |
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264 | * Returns the request method |
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265 | * |
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266 | * @access public |
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267 | * @return string |
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268 | */ |
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269 | static public function GetMethod() { |
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270 | if (isset(self::$method)) |
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271 | return self::$method; |
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272 | else |
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273 | return self::UNKNOWN; |
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274 | } |
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275 | |
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276 | /** |
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277 | * Returns the value of the user parameter of the querystring |
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278 | * |
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279 | * @access public |
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280 | * @return string/boolean false if not available |
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281 | */ |
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282 | static public function GetGETUser() { |
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283 | if (isset(self::$getUser)) |
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284 | return self::$getUser; |
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285 | else |
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286 | return self::UNKNOWN; |
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287 | } |
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288 | |
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289 | /** |
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290 | * Returns the value of the ItemId parameter of the querystring |
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291 | * |
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292 | * @access public |
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293 | * @return string/boolean false if not available |
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294 | */ |
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295 | static public function GetGETItemId() { |
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296 | if (isset(self::$itemId)) |
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297 | return self::$itemId; |
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298 | else |
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299 | return false; |
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300 | } |
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301 | |
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302 | /** |
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303 | * Returns the value of the CollectionId parameter of the querystring |
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304 | * |
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305 | * @access public |
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306 | * @return string/boolean false if not available |
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307 | */ |
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308 | static public function GetGETCollectionId() { |
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309 | if (isset(self::$collectionId)) |
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310 | return self::$collectionId; |
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311 | else |
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312 | return false; |
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313 | } |
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314 | |
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315 | /** |
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316 | * Returns if the SaveInSent parameter of the querystring is set |
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317 | * |
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318 | * @access public |
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319 | * @return boolean |
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320 | */ |
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321 | static public function GetGETSaveInSent() { |
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322 | if (isset(self::$saveInSent)) |
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323 | return self::$saveInSent; |
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324 | else |
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325 | return true; |
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326 | } |
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327 | |
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328 | /** |
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329 | * Returns if the AcceptMultipart parameter of the querystring is set |
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330 | * |
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331 | * @access public |
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332 | * @return boolean |
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333 | */ |
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334 | static public function GetGETAcceptMultipart() { |
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335 | if (isset(self::$acceptMultipart)) |
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336 | return self::$acceptMultipart; |
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337 | else |
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338 | return false; |
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339 | } |
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340 | |
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341 | /** |
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342 | * Returns the value of the AttachmentName parameter of the querystring |
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343 | * |
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344 | * @access public |
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345 | * @return string/boolean false if not available |
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346 | */ |
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347 | static public function GetGETAttachmentName() { |
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348 | if (isset(self::$attachmentName)) |
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349 | return self::$attachmentName; |
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350 | else |
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351 | return false; |
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352 | } |
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353 | |
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354 | /** |
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355 | * Returns the authenticated user |
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356 | * |
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357 | * @access public |
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358 | * @return string/boolean false if not available |
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359 | */ |
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360 | static public function GetAuthUser() { |
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361 | if (isset(self::$authUser)) |
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362 | return self::$authUser; |
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363 | else |
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364 | return false; |
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365 | } |
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366 | |
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367 | /** |
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368 | * Returns the authenticated domain for the user |
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369 | * |
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370 | * @access public |
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371 | * @return string/boolean false if not available |
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372 | */ |
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373 | static public function GetAuthDomain() { |
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374 | if (isset(self::$authDomain)) |
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375 | return self::$authDomain; |
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376 | else |
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377 | return false; |
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378 | } |
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379 | |
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380 | /** |
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381 | * Returns the transmitted password |
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382 | * |
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383 | * @access public |
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384 | * @return string/boolean false if not available |
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385 | */ |
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386 | static public function GetAuthPassword() { |
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387 | if (isset(self::$authPassword)) |
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388 | return self::$authPassword; |
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389 | else |
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390 | return false; |
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391 | } |
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392 | |
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393 | /** |
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394 | * Returns the RemoteAddress |
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395 | * |
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396 | * @access public |
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397 | * @return string |
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398 | */ |
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399 | static public function GetRemoteAddr() { |
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400 | if (isset(self::$remoteAddr)) |
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401 | return self::$remoteAddr; |
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402 | else |
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403 | return "UNKNOWN"; |
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404 | } |
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405 | |
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406 | /** |
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407 | * Returns the command to be executed |
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408 | * |
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409 | * @access public |
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410 | * @return string/boolean false if not available |
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411 | */ |
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412 | static public function GetCommand() { |
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413 | if (isset(self::$command)) |
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414 | return self::$command; |
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415 | else |
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416 | return false; |
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417 | } |
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418 | |
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419 | /** |
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420 | * Returns the command code which is being executed |
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421 | * |
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422 | * @access public |
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423 | * @return string/boolean false if not available |
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424 | */ |
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425 | static public function GetCommandCode() { |
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426 | if (isset(self::$command)) |
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427 | return Utils::GetCodeFromCommand(self::$command); |
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428 | else |
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429 | return false; |
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430 | } |
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431 | |
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432 | /** |
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433 | * Returns the device id transmitted |
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434 | * |
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435 | * @access public |
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436 | * @return string/boolean false if not available |
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437 | */ |
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438 | static public function GetDeviceID() { |
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439 | if (isset(self::$devid)) |
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440 | return self::$devid; |
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441 | else |
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442 | return false; |
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443 | } |
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444 | |
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445 | /** |
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446 | * Returns the device type if transmitted |
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447 | * |
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448 | * @access public |
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449 | * @return string/boolean false if not available |
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450 | */ |
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451 | static public function GetDeviceType() { |
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452 | if (isset(self::$devtype)) |
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453 | return self::$devtype; |
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454 | else |
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455 | return false; |
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456 | } |
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457 | |
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458 | /** |
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459 | * Returns the value of supported AS protocol from the headers |
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460 | * |
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461 | * @access public |
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462 | * @return string/boolean false if not available |
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463 | */ |
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464 | static public function GetProtocolVersion() { |
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465 | if (isset(self::$asProtocolVersion)) |
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466 | return self::$asProtocolVersion; |
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467 | else |
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468 | return false; |
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469 | } |
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470 | |
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471 | /** |
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472 | * Returns the user agent sent in the headers |
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473 | * |
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474 | * @access public |
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475 | * @return string/boolean false if not available |
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476 | */ |
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477 | static public function GetUserAgent() { |
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478 | if (isset(self::$useragent)) |
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479 | return self::$useragent; |
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480 | else |
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481 | return self::UNKNOWN; |
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482 | } |
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483 | |
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484 | /** |
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485 | * Returns policy key sent by the device |
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486 | * |
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487 | * @access public |
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488 | * @return int/boolean false if not available |
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489 | */ |
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490 | static public function GetPolicyKey() { |
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491 | if (isset(self::$policykey)) |
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492 | return self::$policykey; |
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493 | else |
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494 | return false; |
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495 | } |
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496 | |
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497 | /** |
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498 | * Indicates if a policy key was sent by the device |
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499 | * |
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500 | * @access public |
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501 | * @return boolean |
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502 | */ |
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503 | static public function WasPolicyKeySent() { |
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504 | return isset(self::$headers["x-ms-policykey"]); |
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505 | } |
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506 | |
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507 | /** |
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508 | * Indicates if Z-Push was called with a POST request |
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509 | * |
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510 | * @access public |
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511 | * @return boolean |
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512 | */ |
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513 | static public function IsMethodPOST() { |
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514 | return (self::$method == "POST"); |
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515 | } |
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516 | |
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517 | /** |
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518 | * Indicates if Z-Push was called with a GET request |
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519 | * |
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520 | * @access public |
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521 | * @return boolean |
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522 | */ |
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523 | static public function IsMethodGET() { |
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524 | return (self::$method == "GET"); |
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525 | } |
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526 | |
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527 | /** |
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528 | * Indicates if Z-Push was called with a OPTIONS request |
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529 | * |
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530 | * @access public |
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531 | * @return boolean |
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532 | */ |
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533 | static public function IsMethodOPTIONS() { |
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534 | return (self::$method == "OPTIONS"); |
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535 | } |
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536 | |
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537 | /** |
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538 | * Sometimes strange device ids are sumbitted |
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539 | * No device information should be saved when this happens |
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540 | * |
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541 | * @access public |
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542 | * @return boolean false if invalid |
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543 | */ |
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544 | static public function IsValidDeviceID() { |
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545 | if (self::GetDeviceID() === "validate" || self::GetDeviceID() === "webservice") |
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546 | return false; |
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547 | else |
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548 | return true; |
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549 | } |
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550 | |
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551 | /** |
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552 | * Returns the amount of data sent in this request (from the headers) |
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553 | * |
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554 | * @access public |
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555 | * @return int |
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556 | */ |
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557 | static public function GetContentLength() { |
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558 | return (isset(self::$headers["content-length"]))? (int) self::$headers["content-length"] : 0; |
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559 | } |
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560 | |
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561 | |
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562 | /**---------------------------------------------------------------------------------------------------------- |
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563 | * Private stuff |
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564 | */ |
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565 | |
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566 | /** |
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567 | * Replaces all not allowed characters in a string |
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568 | * |
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569 | * @param string $input the input string |
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570 | * @param int $filter one of the predefined filters: LETTERS_ONLY, HEX_ONLY, WORDCHAR_ONLY, NUMBERS_ONLY, NUMBERSDOT_ONLY |
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571 | * @param char $replacevalue (opt) a character the filtered characters should be replaced with |
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572 | * |
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573 | * @access public |
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574 | * @return string |
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575 | */ |
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576 | static private function filterEvilInput($input, $filter, $replacevalue = '') { |
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577 | $re = false; |
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578 | if ($filter == self::LETTERS_ONLY) $re = "/[^A-Za-z]/"; |
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579 | else if ($filter == self::HEX_ONLY) $re = "/[^A-Fa-f0-9]/"; |
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580 | else if ($filter == self::WORDCHAR_ONLY) $re = "/[^A-Za-z0-9]/"; |
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581 | else if ($filter == self::NUMBERS_ONLY) $re = "/[^0-9]/"; |
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582 | else if ($filter == self::NUMBERSDOT_ONLY) $re = "/[^0-9\.]/"; |
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583 | else if ($filter == self::HEX_EXTENDED) $re = "/[^A-Fa-f0-9\:]/"; |
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584 | |
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585 | return ($re) ? preg_replace($re, $replacevalue, $input) : ''; |
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586 | } |
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587 | } |
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588 | ?> |
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