| 1 | 1 | simandl | <?php |
| 2 | | | // WebSVN - Subversion repository viewing via the web using PHP |
| 3 | | | // Copyright (C) 2004-2006 Tim Armes |
| 4 | | | // |
| 5 | | | // This program is free software; you can redistribute it and/or modify |
| 6 | | | // it under the terms of the GNU General Public License as published by |
| 7 | | | // the Free Software Foundation; either version 2 of the License, or |
| 8 | | | // (at your option) any later version. |
| 9 | | | // |
| 10 | | | // This program is distributed in the hope that it will be useful, |
| 11 | | | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | | | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | | | // GNU General Public License for more details. |
| 14 | | | // |
| 15 | | | // You should have received a copy of the GNU General Public License |
| 16 | | | // along with this program; if not, write to the Free Software |
| 17 | | | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | | | // |
| 19 | | | // -- |
| 20 | | | // |
| 21 | | | // auth.php |
| 22 | | | // |
| 23 | | | // Handle reading and interpretation of an SVN auth file |
| 24 | | | |
| 25 | | | require_once("include/accessfile.php"); |
| 26 | | | |
| 27 | | | define("UNDEFINED", 0); |
| 28 | | | define("ALLOW", 1); |
| 29 | | | define("DENY", 2); |
| 30 | | | |
| 31 | | | class Authentication { |
| 32 | | | var $rights; |
| 33 | | | var $user; |
| 34 | | | var $usersGroups = array(); |
| 35 | | | |
| 36 | | | // {{{ __construct |
| 37 | | | |
| 38 | | | function Authentication($accessfile) { |
| 39 | | | $this->rights = new IniFile(); |
| 40 | | | $this->rights->readIniFile($accessfile); |
| 41 | | | $this->setUsername(); |
| 42 | | | $this->identifyGroups(); |
| 43 | | | } |
| 44 | | | |
| 45 | | | // }}} |
| 46 | | | |
| 47 | | | // {{{ setUsername() |
| 48 | | | // |
| 49 | | | // Set the username from the current http session |
| 50 | | | |
| 51 | | | function setUsername() { |
| 52 | | | if (isset($_SERVER["REMOTE_USER"])) { |
| 53 | | | $this->user = $_SERVER["REMOTE_USER"]; |
| 54 | | | } else if (isset($_SERVER["REDIRECT_REMOTE_USER"])) { |
| 55 | | | $this->user = $_SERVER["REDIRECT_REMOTE_USER"]; |
| 56 | 3 | simandl | } else if (isset($_SERVER["PHP_AUTH_USER"])) { |
| 57 | | | $this->user = $_SERVER["PHP_AUTH_USER"]; |
| 58 | 1 | simandl | } |
| 59 | | | } |
| 60 | | | |
| 61 | | | // }}} |
| 62 | | | |
| 63 | | | // {{{ identifyGroups() |
| 64 | | | // |
| 65 | 3 | simandl | // Checks to see which groups and aliases the user belongs to |
| 66 | 1 | simandl | |
| 67 | | | function identifyGroups() { |
| 68 | 3 | simandl | $this->usersGroups[] = '*'; |
| 69 | 1 | simandl | |
| 70 | 3 | simandl | $aliases = $this->rights->getValues('aliases'); |
| 71 | | | if (is_array($aliases)) { |
| 72 | | | foreach ($aliases as $alias => $user) { |
| 73 | | | if ($user == strtolower($this->user)) { |
| 74 | | | $this->usersGroups[] = '&'.$alias; |
| 75 | | | } |
| 76 | | | } |
| 77 | | | } |
| 78 | | | |
| 79 | | | $groups = $this->rights->getValues('groups'); |
| 80 | | | if (is_array($groups)) { |
| 81 | | | foreach ($groups as $group => $names) { |
| 82 | 1 | simandl | if (in_array(strtolower($this->user), preg_split('/\s*,\s*/', $names))) { |
| 83 | 3 | simandl | $this->usersGroups[] = '@'.$group; |
| 84 | 1 | simandl | } |
| 85 | | | |
| 86 | | | foreach ($this->usersGroups as $users_group) { |
| 87 | | | if (in_array($users_group, preg_split('/\s*,\s*/', $names))) { |
| 88 | 3 | simandl | $this->usersGroups[] = '@'.$group; |
| 89 | 1 | simandl | } |
| 90 | | | } |
| 91 | | | } |
| 92 | | | } |
| 93 | | | } |
| 94 | | | |
| 95 | | | // }}} |
| 96 | | | |
| 97 | | | // {{{ inList |
| 98 | | | // |
| 99 | | | // Check if the user is in the given list and return their read status |
| 100 | | | // if they are (UNDEFINED, ALLOW or DENY) |
| 101 | | | |
| 102 | | | function inList($accessors, $user) { |
| 103 | | | $output = UNDEFINED; |
| 104 | | | foreach ($accessors As $key => $rights) { |
| 105 | | | if (in_array($key, $this->usersGroups) || !strcmp($key, strtolower($user))) { |
| 106 | | | if (strpos($rights, "r") !== false) { |
| 107 | | | return ALLOW; |
| 108 | | | } else { |
| 109 | | | $output = DENY; |
| 110 | | | } |
| 111 | | | } |
| 112 | | | } |
| 113 | | | |
| 114 | | | return $output; |
| 115 | | | } |
| 116 | | | |
| 117 | | | // }}} |
| 118 | | | |
| 119 | | | // {{{ hasReadAccess |
| 120 | | | // |
| 121 | | | // Returns true if the user has read access to the given path |
| 122 | | | |
| 123 | | | function hasReadAccess($repos, $path, $checkSubFolders = false) { |
| 124 | | | $access = UNDEFINED; |
| 125 | | | $repos = strtolower($repos); // .ini parser converts groups to lower-case |
| 126 | | | $path = strtolower($path); |
| 127 | | | if ($path == '' || $path{0} != "/") { |
| 128 | | | $path = "/$path"; |
| 129 | | | } |
| 130 | | | |
| 131 | | | // If were told to, we should check sub folders of the path to see if there's |
| 132 | | | // a read access below this level. This is used to display the folders needed |
| 133 | | | // to get to the folder to which read access is granted. |
| 134 | | | |
| 135 | | | if ($checkSubFolders) { |
| 136 | | | $sections = $this->rights->getSections(); |
| 137 | | | |
| 138 | | | foreach ($sections As $section => $accessers) { |
| 139 | | | $qualified = $repos.":".$path; |
| 140 | | | $len = strlen($qualified); |
| 141 | | | if ($len < strlen($section) && strncmp($section, $qualified, $len) == 0) { |
| 142 | | | $access = $this->inList($accessers, $this->user); |
| 143 | | | } |
| 144 | | | |
| 145 | | | if ($access != ALLOW) { |
| 146 | | | $len = strlen($path); |
| 147 | | | if ($len < strlen($section) && strncmp($section, $path, $len) == 0) { |
| 148 | | | $access = $this->inList($accessers, $this->user); |
| 149 | | | } |
| 150 | | | } |
| 151 | | | |
| 152 | | | if ($access == ALLOW) { |
| 153 | | | break; |
| 154 | | | } |
| 155 | | | } |
| 156 | | | } |
| 157 | | | |
| 158 | | | // If we still don't have access, check each subpath of the path until we find an |
| 159 | | | // access level... |
| 160 | | | |
| 161 | | | if ($access != ALLOW) { |
| 162 | | | $access = UNDEFINED; |
| 163 | | | |
| 164 | | | do { |
| 165 | | | $accessers = $this->rights->getValues($repos.":".$path); |
| 166 | | | if (!empty($accessers)) { |
| 167 | | | $access = $this->inList($accessers, $this->user); |
| 168 | | | } |
| 169 | | | |
| 170 | | | if ($access == UNDEFINED) { |
| 171 | | | $accessers = $this->rights->getValues($path); |
| 172 | | | if (!empty($accessers)) { |
| 173 | | | $access = $this->inList($accessers, $this->user); |
| 174 | | | } |
| 175 | | | } |
| 176 | | | |
| 177 | | | // If we've not got a match, remove the sub directory and start again |
| 178 | | | if ($access == UNDEFINED) { |
| 179 | | | if ($path == "/") { |
| 180 | | | break; |
| 181 | | | } |
| 182 | | | $path = substr($path, 0, strrpos(substr($path, 0, -1), "/") + 1); |
| 183 | | | } |
| 184 | | | |
| 185 | | | } while ($access == UNDEFINED && $path != ""); |
| 186 | | | } |
| 187 | | | |
| 188 | | | return $access == ALLOW; |
| 189 | | | } |
| 190 | | | |
| 191 | | | // }}} |
| 192 | | | |
| 193 | | | // {{{ hasUnrestrictedReadAccess |
| 194 | | | // |
| 195 | | | // Returns true if the user has read access to the given path and too |
| 196 | | | // all subfolders |
| 197 | | | |
| 198 | | | function hasUnrestrictedReadAccess($repos, $path) { |
| 199 | | | // First make sure that we have full read access at this level |
| 200 | | | |
| 201 | | | if (!$this->hasReadAccess($repos, $path, false)) { |
| 202 | | | return false; |
| 203 | | | } |
| 204 | | | |
| 205 | | | // Now check to see if there is a sub folder that's protected |
| 206 | | | $repos = strtolower($repos); // .ini parser converts groups to lower-case |
| 207 | | | $path = strtolower($path); |
| 208 | | | |
| 209 | | | $sections = $this->rights->getSections(); |
| 210 | | | |
| 211 | | | foreach ($sections As $section => $accessers) { |
| 212 | | | $qualified = $repos.":".$path; |
| 213 | | | $len = strlen($qualified); |
| 214 | | | $access = UNDEFINED; |
| 215 | | | |
| 216 | | | if ($len <= strlen($section) && strncmp($section, $qualified, $len) == 0) { |
| 217 | | | $access = $this->inList($accessers, $this->user); |
| 218 | | | } |
| 219 | | | |
| 220 | | | if ($access != DENY) { |
| 221 | | | $len = strlen($path); |
| 222 | | | if ($len <= strlen($section) && strncmp($section, $path, $len) == 0) { |
| 223 | | | $access = $this->inList($accessers, $this->user); |
| 224 | | | } |
| 225 | | | } |
| 226 | | | |
| 227 | | | if ($access == DENY) { |
| 228 | | | return false; |
| 229 | | | } |
| 230 | | | } |
| 231 | | | |
| 232 | | | return true; |
| 233 | | | } |
| 234 | | | |
| 235 | | | // }}} |
| 236 | | | |
| 237 | | | } |
