1 | <?php |
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2 | /**************************************************************************\ |
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3 | * eGroupWare API - Access Control List * |
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4 | * This file written by Dan Kuykendall <seek3r@phpgroupware.org> * |
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5 | * Security scheme based on ACL design * |
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6 | * Copyright (C) 2000, 2001 Dan Kuykendall * |
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7 | * -------------------------------------------------------------------------* |
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8 | * This library is part of the eGroupWare API * |
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9 | * http://www.egroupware.org/api * |
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10 | * ------------------------------------------------------------------------ * |
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11 | * This library is free software; you can redistribute it and/or modify it * |
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12 | * under the terms of the GNU Lesser General Public License as published by * |
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13 | * the Free Software Foundation; either version 2.1 of the License, * |
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14 | * or any later version. * |
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15 | * This library is distributed in the hope that it will be useful, but * |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of * |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * |
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18 | * See the GNU Lesser General Public License for more details. * |
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19 | * You should have received a copy of the GNU Lesser General Public License * |
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20 | * along with this library; if not, write to the Free Software Foundation, * |
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21 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * |
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22 | \**************************************************************************/ |
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23 | |
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24 | |
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25 | /*! |
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26 | @class acl |
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27 | @abstract Access Control List Security System |
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28 | @discussion This class provides an ACL security scheme. |
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29 | This can manage rights to 'run' applications, and limit certain features within an application. |
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30 | It is also used for granting a user "membership" to a group, or making a user have the security equivilance of another user. |
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31 | It is also used for granting a user or group rights to various records, such as todo or calendar items of another user. |
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32 | @syntax CreateObject('phpgwapi.acl',int account_id); |
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33 | @example $acl = CreateObject('phpgwapi.acl',5); // 5 is the user id |
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34 | @example $acl = CreateObject('phpgwapi.acl',10); // 10 is the user id |
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35 | @author Seek3r |
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36 | @copyright LGPL |
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37 | @package phpgwapi |
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38 | @access public |
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39 | */ |
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40 | class acl |
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41 | { |
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42 | /*! @var $account_id */ |
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43 | var $account_id; |
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44 | /*! @var $account_type */ |
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45 | var $account_type; |
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46 | /*! @var $data */ |
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47 | var $data = Array(); |
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48 | /*! @var $db */ |
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49 | var $db; |
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50 | var $table_name = 'phpgw_acl'; |
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51 | |
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52 | /*! |
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53 | @function acl |
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54 | @abstract ACL constructor for setting account id |
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55 | @discussion Author: Seek3r <br> |
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56 | Sets the ID for $acl->account_id. Can be used to change a current instances id as well. <br> |
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57 | Some functions are specific to this account, and others are generic. <br> |
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58 | @syntax int acl(int account_id) <br> |
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59 | @example1 acl->acl(5); // 5 is the user id <br> |
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60 | @param account_id int-the user id |
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61 | */ |
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62 | function acl($account_id = '') |
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63 | { |
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64 | $this->db = clone($GLOBALS['phpgw']->db); |
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65 | $this->db->set_app('phpgwapi'); |
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66 | |
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67 | if ((int)$this->account_id != (int)$account_id) |
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68 | { |
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69 | $this->account_id = get_account_id((int)$account_id,@$GLOBALS['phpgw_info']['user']['account_id']); |
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70 | } |
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71 | } |
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72 | |
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73 | function DONTlist_methods($_type='xmlrpc') |
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74 | { |
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75 | /* |
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76 | This handles introspection or discovery by the logged in client, |
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77 | in which case the input might be an array. The server always calls |
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78 | this function to fill the server dispatch map using a string. |
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79 | */ |
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80 | |
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81 | if (is_array($_type)) |
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82 | { |
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83 | $_type = $_type['type'] ? $_type['type'] : $_type[0]; |
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84 | } |
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85 | |
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86 | switch($_type) |
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87 | { |
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88 | case 'xmlrpc': |
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89 | $xml_functions = array( |
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90 | 'read_repository' => array( |
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91 | 'function' => 'read_repository', |
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92 | 'signature' => array(array(xmlrpcStruct)), |
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93 | 'docstring' => lang('FIXME!') |
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94 | ), |
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95 | 'get_rights' => array( |
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96 | 'function' => 'get_rights', |
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97 | 'signature' => array(array(xmlrpcStruct,xmlrpcStruct)), |
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98 | 'docstring' => lang('FIXME!') |
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99 | |
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100 | ), |
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101 | 'list_methods' => array( |
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102 | 'function' => 'list_methods', |
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103 | 'signature' => array(array(xmlrpcStruct,xmlrpcString)), |
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104 | 'docstring' => lang('Read this list of methods.') |
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105 | ) |
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106 | ); |
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107 | return $xml_functions; |
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108 | break; |
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109 | case 'soap': |
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110 | return $this->soap_functions; |
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111 | break; |
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112 | default: |
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113 | return array(); |
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114 | break; |
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115 | } |
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116 | } |
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117 | |
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118 | /**************************************************************************\ |
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119 | * These are the standard $this->account_id specific functions * |
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120 | \**************************************************************************/ |
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121 | |
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122 | /*! |
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123 | @function read_repository |
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124 | @abstract Read acl records from reposity |
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125 | @discussion Author: Seek3r <br> |
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126 | Reads ACL records for $acl->account_id and returns array along with storing it in $acl->data. <br> |
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127 | Syntax: array read_repository() <br> |
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128 | Example1: acl->read_repository(); <br> |
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129 | Should only be called within this class |
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130 | */ |
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131 | function read_repository() |
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132 | { |
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133 | // For some reason, calling this via XML-RPC doesn't call the constructor. |
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134 | // Here is yet another work around(tm) (jengo) |
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135 | if (!$this->account_id) |
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136 | { |
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137 | $this->acl(); |
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138 | } |
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139 | $acl_acc_list = array_values((array)$this->get_location_list_for_id('phpgw_group', 1, $this->account_id)); |
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140 | array_unshift($acl_acc_list,$this->account_id,0); |
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141 | $this->db->select($this->table_name,'*',array('acl_account' => $acl_acc_list ),__LINE__,__FILE__); |
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142 | |
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143 | $this->data = Array(); |
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144 | while($this->db->next_record()) |
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145 | { |
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146 | $this->data[] = array( |
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147 | 'appname' => $this->db->f('acl_appname'), |
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148 | 'location' => $this->db->f('acl_location'), |
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149 | 'account' => $this->db->f('acl_account'), |
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150 | 'rights' => $this->db->f('acl_rights') |
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151 | ); |
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152 | } |
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153 | return $this->data; |
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154 | } |
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155 | |
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156 | /*! |
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157 | @function read |
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158 | @abstract Read acl records from $acl->data |
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159 | @discussion Author: Seek3r <br> |
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160 | Returns ACL records from $acl->data. <br> |
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161 | Syntax: array read() <br> |
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162 | Example1: acl->read(); <br> |
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163 | */ |
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164 | function read() |
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165 | { |
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166 | if (!count($this->data)) |
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167 | { |
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168 | $this->read_repository(); |
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169 | } |
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170 | return $this->data; |
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171 | } |
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172 | |
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173 | /*! |
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174 | @function add |
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175 | @abstract Adds ACL record to $acl->data |
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176 | @discussion Adds ACL record to $acl->data. <br> |
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177 | Syntax: array add() <br> |
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178 | Example1: acl->add(); |
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179 | @param $appname default False derives value from $phpgw_info['flags']['currentapp'] |
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180 | @param $location location |
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181 | @param $rights rights |
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182 | */ |
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183 | function add($appname,$location,$rights) |
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184 | { |
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185 | if (!$appname) $appname = $GLOBALS['phpgw_info']['flags']['currentapp']; |
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186 | |
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187 | $this->data[] = array( |
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188 | 'appname' => $appname, |
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189 | 'location' => $location, |
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190 | 'account' => (int) $this->account_id, |
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191 | 'rights' => (int) $rights |
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192 | ); |
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193 | |
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194 | return $this->data; |
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195 | } |
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196 | |
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197 | function persist_shared_groups($location) |
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198 | { |
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199 | $this->db->persist_shared_groups($location,$this->account_id); |
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200 | } |
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201 | |
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202 | /*! |
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203 | @function delete |
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204 | @abstract Delete ACL record |
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205 | @discussion |
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206 | Syntax <br> |
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207 | Example: <br> |
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208 | @param $appname optional defaults to $phpgw_info['flags']['currentapp'] |
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209 | @param $location app location |
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210 | */ |
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211 | function delete($appname, $location) |
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212 | { |
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213 | if (!$appname) $appname = $GLOBALS['phpgw_info']['flags']['currentapp']; |
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214 | |
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215 | foreach($this->data as $idx => $value) |
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216 | { |
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217 | if ($this->data[$idx]['appname'] == $appname && $this->data[$idx]['location'] == $location && $this->data[$idx]['account'] == $this->account_id) |
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218 | { |
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219 | unset($this->data[$idx]); |
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220 | } |
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221 | } |
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222 | return $this->data; |
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223 | } |
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224 | |
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225 | /*! |
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226 | @function save_repostiory |
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227 | @abstract save repository |
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228 | @discussion save the repository <br> |
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229 | Syntax: save_repository() <br> |
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230 | example: acl->save_repository() |
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231 | */ |
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232 | |
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233 | function save_repository() |
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234 | { |
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235 | $this->db->delete($this->table_name,array( |
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236 | 'acl_account' => $this->account_id, |
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237 | ),__LINE__,__FILE__); |
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238 | |
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239 | foreach($this->data as $value) |
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240 | { |
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241 | if ($value['account'] == $this->account_id) |
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242 | { |
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243 | $this->db->insert($this->table_name,array( |
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244 | 'acl_appname' => $value['appname'], |
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245 | 'acl_location' => $value['location'], |
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246 | 'acl_account' => $this->account_id, |
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247 | 'acl_rights' => $value['rights'], |
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248 | ),false,__LINE__,__FILE__); |
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249 | } |
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250 | } |
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251 | return $this->data; |
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252 | } |
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253 | |
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254 | /**************************************************************************\ |
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255 | * These are the non-standard $this->account_id specific functions * |
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256 | \**************************************************************************/ |
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257 | |
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258 | /*! |
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259 | @function get_rights |
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260 | @abstract get rights from the repository not specific to this->account_id (?) |
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261 | @discussion |
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262 | @param $location app location to get rights from |
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263 | @param $appname optional defaults to $phpgw_info['flags']['currentapp']; |
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264 | */ |
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265 | function get_rights($location,$appname = False) |
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266 | { |
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267 | // For XML-RPC, change this once its working correctly for passing parameters (jengo) |
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268 | if (is_array($location)) |
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269 | { |
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270 | $appname = $location['appname']; |
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271 | $location = $location['location']; |
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272 | } |
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273 | |
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274 | if (!count($this->data)) |
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275 | { |
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276 | $this->read_repository(); |
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277 | } |
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278 | if (!$appname) $appname = $GLOBALS['phpgw_info']['flags']['currentapp']; |
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279 | |
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280 | if (!count($this->data) && $GLOBALS['phpgw_info']['server']['acl_default'] != 'deny') |
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281 | { |
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282 | return True; |
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283 | } |
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284 | $rights = 0; |
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285 | foreach($this->data as $idx => $value) |
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286 | { |
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287 | if ($value['appname'] == $appname) |
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288 | { |
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289 | if ($value['location'] == $location || $value['location'] == 'everywhere') |
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290 | { |
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291 | if ($value['rights'] == 0) |
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292 | { |
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293 | return False; |
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294 | } |
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295 | $rights |= $value['rights']; |
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296 | } |
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297 | } |
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298 | } |
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299 | return $rights; |
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300 | } |
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301 | /*! |
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302 | @function check |
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303 | @abstract check required rights (not specific to this->account_id?) |
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304 | @param $location app location |
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305 | @param $required required right to check against |
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306 | @param $appname optional defaults to currentapp |
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307 | */ |
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308 | function check($location, $required, $appname = False) |
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309 | { |
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310 | $rights = $this->get_rights($location,$appname); |
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311 | |
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312 | return !!($rights & $required); |
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313 | } |
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314 | /*! |
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315 | @function get_specific_rights |
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316 | @abstract get specific rights for this->account_id for an app location |
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317 | @param $location app location |
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318 | @param $appname optional defaults to currentapp |
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319 | @result $rights ? |
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320 | */ |
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321 | function get_specific_rights($location, $appname = False) |
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322 | { |
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323 | if (!$appname) $appname = $GLOBALS['phpgw_info']['flags']['currentapp']; |
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324 | |
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325 | if (!count($this->data) && $GLOBALS['phpgw_info']['server']['acl_default'] != 'deny') |
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326 | { |
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327 | return True; |
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328 | } |
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329 | $rights = 0; |
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330 | |
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331 | foreach($this->data as $idx => $value) |
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332 | { |
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333 | if ($value['appname'] == $appname && |
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334 | ($value['location'] == $location || $value['location'] == 'everywhere') && |
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335 | $value['account'] == $this->account_id) |
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336 | { |
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337 | if ($value['rights'] == 0) |
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338 | { |
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339 | return False; |
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340 | } |
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341 | $rights |= $value['rights']; |
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342 | } |
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343 | } |
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344 | return $rights; |
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345 | } |
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346 | /*! |
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347 | @function check_specific |
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348 | @abstract check specific |
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349 | @param $location app location |
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350 | @param $required required rights |
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351 | @param $appname optional defaults to currentapp |
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352 | @result boolean |
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353 | */ |
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354 | function check_specific($location, $required, $appname = False) |
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355 | { |
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356 | $rights = $this->get_specific_rights($location,$appname); |
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357 | |
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358 | return !!($rights & $required); |
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359 | } |
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360 | |
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361 | /**************************************************************************\ |
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362 | * These are the generic functions. Not specific to $this->account_id * |
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363 | \**************************************************************************/ |
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364 | |
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365 | /** |
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366 | * add repository information / rights for app/location/account_id |
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367 | * |
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368 | * @param $app appname |
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369 | * @param $location location |
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370 | * @param $account_id account id |
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371 | * @param $rights rights |
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372 | */ |
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373 | function add_repository($app, $location, $account_id, $rights) |
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374 | { |
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375 | //echo "<p>acl::add_repository('$app','$location',$account_id,$rights);</p>\n"; |
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376 | $this->db->insert($this->table_name,array( |
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377 | 'acl_rights' => $rights, |
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378 | ),array( |
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379 | 'acl_appname' => $app, |
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380 | 'acl_location' => $location, |
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381 | 'acl_account' => $account_id, |
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382 | ),__LINE__,__FILE__); |
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383 | |
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384 | return True; |
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385 | } |
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386 | |
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387 | /** |
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388 | * delete repository information / rights for app/location[/account_id] |
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389 | * @param string $app appname |
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390 | * @param string $location location |
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391 | * @param int/boolean $account_id account id, default 0=$this->account_id, or false to delete all entries for $app/$location |
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392 | * @return int number of rows deleted |
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393 | */ |
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394 | function delete_repository($app, $location, $accountid='') |
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395 | { |
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396 | static $cache_accountid; |
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397 | |
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398 | $where = array( |
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399 | 'acl_appname' => $app, |
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400 | 'acl_location' => $location, |
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401 | ); |
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402 | if ($accountid !== false) |
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403 | { |
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404 | if(isset($cache_accountid[$accountid]) && $cache_accountid[$accountid]) |
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405 | { |
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406 | $where['acl_account'] = $cache_accountid[$accountid]; |
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407 | } |
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408 | else |
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409 | { |
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410 | $where['acl_account'] = $cache_accountid[$accountid] = get_account_id($accountid,$this->account_id); |
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411 | } |
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412 | } |
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413 | if ($app == '%' || $app == '%%') unset($where['acl_appname']); |
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414 | |
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415 | $this->db->delete($this->table_name,$where,__LINE__,__FILE__); |
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416 | |
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417 | return $this->db->affected_rows(); |
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418 | } |
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419 | |
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420 | /*! |
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421 | @function get_app_list_for_id |
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422 | @abstract get application list for an account id |
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423 | @param $location location |
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424 | @param $required ? |
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425 | @param $account_id account id defaults to $phpgw_info['user']['account_id']; |
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426 | */ |
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427 | function get_app_list_for_id($location, $required, $accountid = '') |
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428 | { |
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429 | static $cache_accountid; |
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430 | |
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431 | if($cache_accountid[$accountid]) |
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432 | { |
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433 | $account_id = $cache_accountid[$accountid]; |
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434 | } |
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435 | else |
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436 | { |
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437 | $account_id = get_account_id($accountid,$this->account_id); |
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438 | $cache_accountid[$accountid] = $account_id; |
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439 | } |
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440 | $this->db->select($this->table_name,array('acl_appname','acl_rights'),array( |
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441 | 'acl_location' => $location, |
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442 | 'acl_account' => $account_id, |
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443 | ),__LINE__,__FILE__); |
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444 | |
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445 | $rights = 0; |
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446 | $apps = false; |
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447 | while ($this->db->next_record()) |
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448 | { |
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449 | if ($this->db->f('acl_rights') == 0) |
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450 | { |
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451 | return False; |
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452 | } |
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453 | $rights |= $this->db->f('acl_rights'); |
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454 | if (!!($rights & $required)) |
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455 | { |
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456 | $apps[] = $this->db->f('acl_appname'); |
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457 | } |
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458 | } |
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459 | return $apps; |
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460 | } |
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461 | |
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462 | /*! |
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463 | @function get_location_list_for_id |
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464 | @abstract get location list for id |
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465 | @discussion ? |
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466 | @param $app app |
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467 | @param $required required |
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468 | @param $account_id optional defaults to $phpgw_info['user']['account_id']; |
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469 | */ |
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470 | function get_location_list_for_id($app, $required, $accountid = '') |
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471 | { |
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472 | static $cache_accountid; |
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473 | |
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474 | if($cache_accountid[$accountid]) |
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475 | { |
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476 | $accountid = $cache_accountid[$accountid]; |
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477 | } |
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478 | else |
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479 | { |
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480 | $accountid = $cache_accountid[$accountid] = get_account_id($accountid,$this->account_id); |
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481 | } |
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482 | $this->db->select($this->table_name,'acl_location,acl_rights',array( |
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483 | 'acl_appname' => $app, |
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484 | 'acl_account' => $accountid, |
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485 | ),__LINE__,__FILE__); |
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486 | |
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487 | $locations = false; |
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488 | while ($this->db->next_record()) |
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489 | { |
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490 | if ($this->db->f('acl_rights') & $required) |
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491 | { |
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492 | $locations[] = $this->db->f('acl_location'); |
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493 | } |
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494 | } |
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495 | return $locations; |
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496 | } |
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497 | /*! |
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498 | @function get_ids_for_location |
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499 | @abstract get ids for location |
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500 | @param $location location |
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501 | @param $required required |
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502 | @param $app app optional defaults to $phpgw_info['flags']['currentapp']; |
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503 | */ |
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504 | function get_ids_for_location($location, $required, $app = False) |
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505 | { |
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506 | if (!$app) $app = $GLOBALS['phpgw_info']['flags']['currentapp']; |
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507 | |
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508 | $this->db->select($this->table_name,array('acl_account','acl_rights'),array( |
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509 | 'acl_appname' => $app, |
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510 | 'acl_location' => $location, |
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511 | ),__LINE__,__FILE__); |
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512 | |
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513 | $accounts = false; |
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514 | while ($this->db->next_record()) |
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515 | { |
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516 | if (!!($this->db->f('acl_rights') & $required)) |
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517 | { |
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518 | $accounts[] = (int) $this->db->f('acl_account'); |
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519 | } |
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520 | } |
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521 | return $accounts; |
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522 | } |
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523 | |
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524 | /*! |
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525 | @function get_user_applications |
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526 | @abstract get a list of applications a user has rights to |
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527 | @param $account_id optional defaults to $phpgw_info['user']['account_id']; |
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528 | @result $apps array containing list of apps |
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529 | */ |
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530 | function get_user_applications($accountid = '') |
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531 | { |
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532 | static $cache_accountid; |
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533 | |
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534 | if($cache_accountid[$accountid]) |
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535 | { |
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536 | $account_id = $cache_accountid[$accountid]; |
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537 | } |
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538 | else |
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539 | { |
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540 | $account_id = get_account_id($accountid,$this->account_id); |
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541 | $cache_accountid[$accountid] = $account_id; |
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542 | } |
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543 | $memberships = array($account_id); |
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544 | foreach((array)$GLOBALS['phpgw']->accounts->membership($account_id) as $group) |
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545 | { |
---|
546 | $memberships[] = $group['account_id']; |
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547 | } |
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548 | $db2 = clone($this->db); |
---|
549 | $db2->select($this->table_name,array('acl_appname','acl_rights'),array( |
---|
550 | 'acl_location' => 'run', |
---|
551 | 'acl_account' => $memberships, |
---|
552 | ),__LINE__,__FILE__); |
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553 | |
---|
554 | $apps = false; |
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555 | while ($db2->next_record()) |
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556 | { |
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557 | $app = $db2->f('acl_appname'); |
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558 | if(!isset($apps[$app])) |
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559 | { |
---|
560 | $apps[$app] = 0; |
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561 | } |
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562 | $apps[$app] |= (int) $db2->f('acl_rights'); |
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563 | } |
---|
564 | return $apps; |
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565 | } |
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566 | /*! |
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567 | @function get_grants |
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568 | @abstract ? |
---|
569 | @param $app optional defaults to $phpgw_info['flags']['currentapp']; |
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570 | */ |
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571 | function get_grants($app='') |
---|
572 | { |
---|
573 | if (!$app) $app = $GLOBALS['phpgw_info']['flags']['currentapp']; |
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574 | |
---|
575 | $memberships = array($this->account_id); |
---|
576 | foreach((array)$GLOBALS['phpgw']->accounts->membership($this->account_id) as $group) |
---|
577 | { |
---|
578 | $memberships[] = $group['account_id']; |
---|
579 | } |
---|
580 | $db2 = clone($this->db); |
---|
581 | $db2->select($this->table_name,array('acl_account','acl_rights'),array( |
---|
582 | 'acl_appname' => $app, |
---|
583 | 'acl_location' => $memberships, |
---|
584 | ),__LINE__,__FILE__); |
---|
585 | |
---|
586 | $grants = $accounts = Array(); |
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587 | while ($db2->next_record()) |
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588 | { |
---|
589 | $grantor = $db2->f('acl_account'); |
---|
590 | $rights = $db2->f('acl_rights'); |
---|
591 | |
---|
592 | if(!isset($accounts[$grantor])) |
---|
593 | // cache the group-members for performance |
---|
594 | { |
---|
595 | // if $grantor is a group, get its members |
---|
596 | $members = $this->get_ids_for_location($grantor,1,'phpgw_group'); |
---|
597 | if(!$members) |
---|
598 | { |
---|
599 | $accounts[$grantor] = Array($grantor); |
---|
600 | $is_group[$grantor] = False; |
---|
601 | } |
---|
602 | else |
---|
603 | { |
---|
604 | $accounts[$grantor] = $members; |
---|
605 | $is_group[$grantor] = True; |
---|
606 | } |
---|
607 | } |
---|
608 | if(@$is_group[$grantor]) |
---|
609 | { |
---|
610 | // Don't allow to override private! |
---|
611 | $rights &= (~ PHPGW_ACL_PRIVATE); |
---|
612 | if(!isset($grants[$grantor])) |
---|
613 | { |
---|
614 | $grants[$grantor] = 0; |
---|
615 | } |
---|
616 | $grants[$grantor] |= $rights; |
---|
617 | if(!!($rights & PHPGW_ACL_READ)) |
---|
618 | { |
---|
619 | $grants[$grantor] |= PHPGW_ACL_READ; |
---|
620 | } |
---|
621 | } |
---|
622 | foreach($accounts[$grantor] as $grantors) |
---|
623 | { |
---|
624 | if(!isset($grants[$grantors])) |
---|
625 | { |
---|
626 | $grants[$grantors] = 0; |
---|
627 | } |
---|
628 | $grants[$grantors] |= $rights; |
---|
629 | } |
---|
630 | } |
---|
631 | $grants[$GLOBALS['phpgw_info']['user']['account_id']] = ~0; |
---|
632 | |
---|
633 | return $grants; |
---|
634 | } |
---|
635 | |
---|
636 | /** |
---|
637 | * Deletes all ACL entries for an account (user or group) |
---|
638 | * |
---|
639 | * @param int $account_id acount-id |
---|
640 | */ |
---|
641 | function delete_account($account_id) |
---|
642 | { |
---|
643 | if ((int) $account_id) |
---|
644 | { |
---|
645 | $this->db->delete($this->table_name,array( |
---|
646 | 'acl_account' => $account_id |
---|
647 | ),__LINE__,__FILE__); |
---|
648 | // delete all memberships in account_id (if it is a group) |
---|
649 | $this->db->delete($this->table_name,array( |
---|
650 | 'acl_appname' => 'phpgw_group', |
---|
651 | 'acl_location' => $account_id, |
---|
652 | ),__LINE__,__FILE__); |
---|
653 | } |
---|
654 | } |
---|
655 | } //end of acl class |
---|