lib/security.lib.php

   1 <?php
   2 /*
   3         (c) 2005 Joe Presbrey
   4 */
   5
   6 require_once('mitsql.lib.php');
   7
   8 class Login {
   9         private $id, $u, $p;
  10     private $info;
  11     function Login($u, $p=null) {
  12                 if (empty($u)) return;
  13                 $this->u = $u;
  14                 $this->p = $p;
  15                 if (is_numeric($u)) {
  16                         $this->id = $u;
  17                         $opt = sprintf(" Username = '%s' OR UserId = '%s'", mysql_escape_string($u), mysql_escape_string($u));
  18                 } else {
  19                         $opt = sprintf(" Username = '%s'", mysql_escape_string($u));
  20                         $opt .= (is_null($p)?'':sprintf(" AND Password='%s'", mysql_escape_string(base64_encode($p))));
  21                 }
  22         $sql = sprintf("SELECT UserId, Username, Name, Email, UL, bEnabled
  23                         FROM User
  24                         WHERE %s", $opt);
  25         $r = fetchRows(DBSelect($sql),'UserId');
  26                 $this->info = count($r)?array_shift($r):$r;
  27         }
  28     function exists() {
  29         return count($this->info);
  30     }
  31         function isValid() {
  32                 return $this->getUL()>0;
  33         }
  34     function isEnabled() {
  35         return $this->exists() && $this->info['bEnabled']==1;
  36     }
  37     function canLogin() {
  38         return $this->isEnabled() && $this->isValid();
  39     }
  40     function canSignup() {
  41         return !$this->isEnabled() && $this->isValid();
  42     }
  43     function getUserId() {
  44         return $this->exists()?$this->info['UserId']:'';
  45     }
  46     function getUsername() {
  47         return $this->exists()?$this->info['Username']:'';
  48     }
  49     function getName() {
  50         return $this->exists()?$this->info['Name']:'';
  51     }
  52     function getEmail() {
  53         return $this->exists()?$this->info['Email']:'';
  54     }
  55     function getUL() {
  56         return $this->exists()?$this->info['UL']:'';
  57     }
  58     function expire() {
  59         $this->info = null;
  60     }
  61     function refresh() {
  62                 if (!empty($this->id)) {
  63                         $this->Login($this->id);
  64                 } else {
  65                         $this->Login($this->u,$this->p);
  66                 }
  67     }
  68     function update($name=null,$email=null) {
  69         if (!$this->exists()) return;
  70         $arr = array();
  71                 if ($name == $this->getName()) $name = null;
  72                 if ($email == $this->getEmail()) $email = null;
  73         is_null($name) || $arr['Name'] = $name;
  74         is_null($email) || $arr['Email'] = $email;
  75                 $upd = buildSQLSet($arr);
  76         $sql = sprintf("UPDATE User SET %s WHERE UserId = '%s'",
  77                         $upd, mysql_escape_string($this->getUserId()));
  78                 if (!empty($upd) && $upd != 'SET')
  79                         DBUpdate($sql);
  80                 if (isset($arr['Name']))
  81                         $this->info['Name'] = $arr['Name'];
  82                 if (isset($arr['Email']))
  83                         $this->info['Email'] = $arr['Email'];
  84         }
  85 }
  86
  87 class User {
  88         private $userId;
  89         private $info;
  90         private $dblist;
  91     function User($userId) {
  92                 $this->userId = $userId;
  93         $sql = sprintf("SELECT User.UserId, Username, Name, Email, UL, bEnabled, nBytesSoft, nBytesHard, nBytes, nDatabases, nDatabasesHard, IF(nBytes>nBytesHard,1,0) AS bOverQuota
  94                         FROM User
  95                                                 INNER JOIN UserQuota ON User.UserId = UserQuota.UserId
  96                                                 INNER JOIN UserStat ON User.UserId = UserStat.UserId
  97                         WHERE User.UserId = '%s'",
  98                         mysql_escape_string($userId));
  99         $r = fetchRows(DBSelect($sql),'UserId');
 100         $this->info = count($r)?array_shift($r):$r;
 101                 $this->dblist = $this->getDBList();
 102     }
 103         function refresh() {
 104                 unset($this->dblist);
 105                 $this->User($this->userId);
 106                 /*
 107         $sql = sprintf("SELECT UserId, Username, Name, Email, UL, bEnabled
 108                         FROM User
 109                         WHERE UserId = '%s'",
 110                         mysql_escape_string($this->userId));
 111         $r = fetchRows(DBSelect($sql),'UserId');
 112         $this->info = count($r)?array_shift($r):$r;
 113                 unset($this->dblist);
 114                 $this->getDBList();
 115                 */
 116         }
 117     function exists() {
 118         return count($this->info);
 119     }
 120     function getUserId() {
 121         return $this->exists()?$this->info['UserId']:'';
 122     }
 123     function getUsername() {
 124         return $this->exists()?$this->info['Username']:'';
 125     }
 126     function isOverQuota() {
 127         return $this->exists()?($this->info['bOverQuota']>0?true:false):'';
 128     }
 129     function getBytes() {
 130         if($this->exists()) {
 131                         $arr['nBytes'] = $this->info['nBytes'];
 132                         $arr['nBytesSoft'] = $this->info['nBytesSoft'];
 133                         $arr['nBytesHard'] = $this->info['nBytesHard'];
 134                         return $arr;
 135                 }
 136     }
 137         function setPassword($pwd) {
 138                 $arr['Password'] = base64_encode($pwd);
 139         $sql = sprintf("UPDATE User SET %s WHERE UserId = '%s'",
 140                         buildSQLSet($arr), mysql_escape_string($this->getUserId()));
 141         DBUpdate($sql);
 142                 $sql = sprintf('SET PASSWORD FOR \'%s\'@\'%%\'=PASSWORD(\'%s\')',
 143                                                 mysql_escape_string($this->getUsername()),
 144                                                 mysql_escape_string($pwd));
 145                 DBSet($sql);
 146         }
 147         function signup($pwd) {
 148                 $this->pass = $pwd;
 149                 $arr['Password'] = base64_encode($pwd);
 150                 $arr['bEnabled'] = 1;
 151                 $arr['dSignup'] = 'NOW()';
 152         $sql = sprintf("UPDATE User SET %s WHERE UserId = '%s'",
 153                         buildSQLSet($arr), mysql_escape_string($this->getUserId()));
 154         DBUpdate($sql);
 155
 156                 $this->setUsage();
 157                 $this->setAccess();
 158         }
 159         function setUsage($yes=true) {
 160                 $verb = $yes?'GRANT':'REVOKE';
 161                 $prep = $yes?'TO':'FROM';
 162                 $suffix = $yes?sprintf("IDENTIFIED BY '%s'",mysql_escape_string($this->pass)):'';
 163                 $sql = sprintf("%s USAGE ON * . * %s '%s'@'%s' %s",
 164                                                 mysql_escape_string($verb),
 165                                                 mysql_escape_string($prep),
 166                                                 mysql_escape_string($this->getUsername()),
 167                                                 '%',
 168                                                 $suffix);
 169                 DBGrant($sql);
 170         }
 171         function setAccess($db=null,$yes=true) {
 172                 $verb = $yes?'GRANT':'REVOKE';
 173                 $prep = $yes?'TO':'FROM';
 174                 if (is_null($db)) {
 175                         $dbs = $this->getDBList();
 176                 } else {
 177                         $dbs[] = array('Name'=>$db);
 178                 }
 179                 foreach($dbs as $db) {
 180                         $name = $db['Name'];
 181                         $sql = sprintf("%s ALL PRIVILEGES ON `%s` . * %s '%s'@'%s'",
 182                                                         mysql_escape_string($verb),
 183                                                         mysql_escape_string($name),
 184                                                         mysql_escape_string($prep),
 185                                                         mysql_escape_string($this->getUsername()),
 186                                                         '%');
 187                         DBGrant($sql);
 188                 }
 189         }
 190         function getDBList() {
 191                 if (isset($this->dblist)) {
 192                         return $this->dblist;
 193                 } else {
 194                         //                      LEFT JOIN DBQuota ON DBQuota.DatabaseId = DBOwner.DatabaseId
 195                         $sql = sprintf("SELECT *
 196                                                 FROM DBOwner
 197                                                 INNER JOIN DB ON DB.DatabaseId = DBOwner.DatabaseId
 198                                                 INNER JOIN DBQuota ON DBQuota.DatabaseId = DBOwner.DatabaseId
 199                                                 WHERE DBOwner.UserId = '%s' AND DB.bEnabled=1",
 200                                                 mysql_escape_string($this->getUserId()));
 201 //                      $r = fetchRows(DBSelect($sql),'DatabaseId');
 202                         $r = fetchRows(DBSelect($sql),'Name');
 203                         ksort($r);
 204                         return $r;
 205                 }
 206         }
 207         function addDB($name) {
 208                 if (in_array($name, array_keys($this->getDBList()))) return false;
 209                 if (!addDB($name, $this->getUserId())) return false;
 210                 $this->setAccess($name);
 211                 return true;
 212         }
 213         function delDB($name) {
 214                 if (!in_array($name, array_keys($this->getDBList()))) return false;
 215                 if (!delDB($name)) return false;//, $this->getUserId())) return false;
 216                 $this->setAccess($name,false);
 217                 return true;
 218         }
 219 }
 220
 221
 222 function isLoggedIn($aLogin=null) {
 223     if (is_null($aLogin)) {
 224         global $Login;
 225         $aLogin = $Login;
 226     }
 227     return !empty($aLogin) && ($aLogin instanceof Login) && $aLogin->canLogin();
 228 }
 229
 230 function isAdmin($aLogin=null) {
 231     if (is_null($aLogin)) {
 232         global $Login;
 233         $aLogin = $Login;
 234     }
 235     return !empty($aLogin) && ($aLogin instanceof Login) && $aLogin->getUL()>=100;
 236 }
 237
 238 function isImpersonating() {
 239         return isSess('_UserId') && isSess('UserId');
 240 }
 241
 242 function isOffline() {
 243         return (defined('OFFLINE') && OFFLINE);
 244 }
 245
 246 function isOnline() {
 247         return !isOffline();
 248 }
 249
 250 function impersonate($userId=null) {
 251         $wasImpersonating = isImpersonating();
 252         if ($wasImpersonating) {
 253                 if (is_null($userId) || empty($userId)) {
 254                         sess('UserId',sess('_UserId'));
 255                         sess('_UserId','');
 256                 } elseif ($userId>0) {
 257                         sess('UserId',$userId);
 258                 } else {
 259                         return false;
 260                 }
 261         } elseif (isLoggedIn()) {
 262                 sess('_UserId',sess('UserId'));
 263                 sess('UserId',$userId);
 264                 return true;
 265         } else {
 266                 return false;
 267         }
 268 }
 269
 270 function isSSL() {
 271         return isset($_SERVER['SERVER_PORT'])?($_SERVER['SERVER_PORT'] == 443):false;
 272 }
 273
 274 function getSSLCert() {
 275     if (DEVEL && file_exists('.forceauth')) {
 276         $fu = explode('|',file_get_contents('.forceauth'));
 277         $name = trim($fu[0]);
 278         $email = trim($fu[1]);
 279     } else {
 280         $name = isset($_SERVER['SSL_CLIENT_S_DN_CN'])?$_SERVER['SSL_CLIENT_S_DN_CN']:null;
 281         $email = isset($_SERVER['SSL_CLIENT_S_DN_Email'])?$_SERVER['SSL_CLIENT_S_DN_Email']:null;
 282     }
 283     if (!is_null($email)) {
 284         $user = explode('@',$email);
 285                 $user = $user[0];
 286         return array('Username'=>$user, 'Name'=>$name, 'Email'=>$email);
 287         } else {
 288                 return null;
 289         }
 290 }
 291
 292 ## 302 REDIRECTS
 293
 294 function redirect($target=null,$secure=null) {
 295     $base = (is_null($target)||substr($target,0,1)=='?')?$_SERVER['REDIRECT_URL']:(dirname($_SERVER['REDIRECT_URL']).'/');
 296     redirectFull(is_null($target)?$base:($base.$target),$secure);
 297 }
 298 function redirectStart() {
 299         redirectFull(BASE_URL,null);
 300 }
 301 function redirectFull($target,$secure) {
 302         //redirect2((((isSSL()&&is_null($secure))||$secure==true)?'https://':'http://').$_SERVER['SERVER_NAME'].$target);
 303         redirect2((((isSSL()&&is_null($secure))||$secure==true)?'https://scripts-cert.mit.edu':'http://scripts.mit.edu').$target);
 304 }
 305 function redirect2($target) {
 306         header('Location: '.$target);
 307         exit;
 308 }
 309 function flipSSL() {
 310         //return (isSSL()?'http://':'https://').$_SERVER['SERVER_NAME'].$_SERVER['REDIRECT_URL'];
 311         return (isSSL()?'http://scripts.mit.edu':'https://scripts-cert.mit.edu').$_SERVER['REDIRECT_URL'];
 312 }
 313
 314 ## USER SCRIPTS
 315
 316 function addUser($sslCredentials) {
 317     global $_NEW_USER, $_NEW_USERQUOTA, $_NEW_USERSTAT;
 318
 319     $arr = array_merge($sslCredentials, $_NEW_USER);
 320     $sql = sprintf("INSERT INTO User %s",
 321                     buildSQLInsert($arr));
 322     $UserId = DBInsert($sql);
 323
 324         $arr = $_NEW_USERQUOTA;
 325         $arr['UserId'] = $UserId;
 326     $sql = sprintf("INSERT INTO UserQuota %s",
 327                     buildSQLInsert($arr));
 328         DBInsert($sql);
 329
 330         $arr = $_NEW_USERSTAT;
 331         $arr['UserId'] = $UserId;
 332     $sql = sprintf("INSERT INTO UserStat %s",
 333                     buildSQLInsert($arr));
 334         DBInsert($sql);
 335
 336         return $UserId;
 337 }
 338
 339 function addDB($dbname,$userid) {
 340         global $_NEW_DB, $_NEW_DBQUOTA, $_NEW_DBOWNER;
 341
 342         DBCreate(sprintf('CREATE DATABASE `%s`', mysql_escape_string($dbname)));
 343         if (mysql_error()) return false;
 344
 345         $newdb['Name'] = $dbname;
 346         $arr = array_merge($newdb, $_NEW_DB);
 347         $arr['bEnabled'] = 1;
 348         $sql = sprintf("INSERT IGNORE INTO DB %s",
 349                     buildSQLInsert($arr));
 350         $DBId = DBInsert($sql);
 351         if (empty($DBId)) {
 352                 $sql = sprintf("SELECT DatabaseId FROM DB WHERE Name = '%s'",
 353                                                 mysql_escape_string($dbname));
 354                 $r = fetchRows(DBSelect($sql), 'DatabaseId');
 355                 if (count($r)) {
 356                         $r = array_shift($r);
 357                         $DBId = $r['DatabaseId'];
 358                 } else {
 359                         return false;
 360                 }
 361                 $sql = sprintf("UPDATE DB SET %s WHERE DB.DatabaseId = '%s'",
 362                                                 buildSQLSet($arr),
 363                                                 $DBId);
 364                 DBUpdate($sql);
 365         }
 366
 367         DBDelete(sprintf("DELETE FROM DBOwner WHERE DatabaseId = '%s'", mysql_escape_string($DBId)));
 368         DBDelete(sprintf("DELETE FROM DBQuota WHERE DatabaseId = '%s'", mysql_escape_string($DBId)));
 369
 370         $arr = $_NEW_DBQUOTA;
 371         $arr['DatabaseId'] = $DBId;
 372         $sql = sprintf("INSERT IGNORE INTO DBQuota %s",
 373                                         buildSQLInsert($arr));
 374         DBInsert($sql);
 375
 376         $arr = $_NEW_DBOWNER;
 377         $arr['DatabaseId'] = $DBId;
 378         $arr['UserId'] = $userid;
 379         $sql = sprintf("INSERT IGNORE INTO DBOwner %s",
 380                                         buildSQLInsert($arr));
 381         DBInsert($sql);
 382
 383         return $DBId;
 384 }
 385
 386 function delDB($dbname) {
 387         global $_NEW_DB, $_NEW_DBQUOTA, $_NEW_DBOWNER;
 388
 389         DBCreate(sprintf('DROP DATABASE `%s`', mysql_escape_string($dbname)));
 390
 391         $arr['bEnabled'] = 0;
 392         $sql = sprintf("UPDATE DB SET %s WHERE DB.Name = '%s'",
 393                                         buildSQLSet($arr),
 394                                         $dbname);
 395         DBUpdate($sql);
 396
 397         return true;
 398 }
 399
 400 ?>