git-svn-id: svn://presbrey.mit.edu/sql/mitsql@73 a142d4bd-2cfb-0310-9673-cb33a7e74f58

[sql-web.git] / lib / security.lib.php

<?php

require_once('mitsql.lib.php');

class Login {
	var $id, $u, $p;
    var $info;
    function Login($u, $p=null) {
		if (empty($u)) return;
   		$this->u = $u;
		$this->p = $p;
		if (is_numeric($u)) {
			$this->id = $u;
			$opt = sprintf(" UserId = '%s'", mysql_escape_string($u));
		} else {
			$opt = sprintf(" Username = '%s'", mysql_escape_string($u));
			$opt .= (is_null($p)?'':sprintf(" AND Password='%s'", mysql_escape_string(base64_encode($p))));
		}
        $sql = sprintf("SELECT UserId, Username, Name, Email, UL, bEnabled
                        FROM User
                        WHERE %s", $opt);
        $r = fetchRows(DBSelect($sql),'UserId');
		$this->info = count($r)?array_shift($r):$r;
	}
    function exists() {
        return count($this->info);
    }
	function isValid() {
		return $this->getUL()>0;
	}
    function isEnabled() {
        return $this->exists() && $this->info['bEnabled']==1;
    }
    function canLogin() {
        return $this->isEnabled() && $this->isValid();
    }
    function canSignup() {
        return !$this->isEnabled() && $this->isValid();
    }
    function getUserId() {
        return $this->exists()?$this->info['UserId']:'';
    }
    function getUsername() {
        return $this->exists()?$this->info['Username']:'';
    }
    function getName() {
        return $this->exists()?$this->info['Name']:'';
    }
    function getEmail() {
        return $this->exists()?$this->info['Email']:'';
    }
    function getUL() {
        return $this->exists()?$this->info['UL']:'';
    }
    function expire() {
        $this->info = null;
    }
    function refresh() {
		if (!empty($this->id)) {
			$this->Login($this->id);
		} else {
			$this->Login($this->u,$this->p);
		}
    }
    function update($name=null,$email=null) {
        if (!$this->exists()) return;
        $arr = array();
		if ($name == $this->getName()) $name = null;
		if ($email == $this->getEmail()) $email = null;
        is_null($name) || $arr['Name'] = $name;
        is_null($email) || $arr['Email'] = $email;
		$upd = buildSQLSet($arr);
        $sql = sprintf("UPDATE User %s WHERE UserId = '%s'",
                        $upd, mysql_escape_string($this->getUserId()));
		if (!empty($upd) && $upd != 'SET')
			DBUpdate($sql);
		if (isset($arr['Name']))
			$this->info['Name'] = $arr['Name'];
		if (isset($arr['Email']))
			$this->info['Email'] = $arr['Email'];
	}
}

class User {
	var $userId;
	var $info;
	var $dblist;
    function User($userId) {
		$this->userId = $userId;
        $sql = sprintf("SELECT User.UserId, Username, Password, Name, Email, UL, bEnabled, nBytesSoft, nBytesHard, nBytes, nDatabases, nDatabasesHard, IF(nBytes>nBytesHard,1,0) AS bOverQuota
                        FROM User
						INNER JOIN UserQuota ON User.UserId = UserQuota.UserId
						INNER JOIN UserStat ON User.UserId = UserStat.UserId
                        WHERE User.UserId = '%s'",
                        mysql_escape_string($userId));
        $r = fetchRows(DBSelect($sql),'UserId');
        $this->info = count($r)?array_shift($r):$r;
		$this->dblist = $this->getDBList();
//		$this->pass = base64_decode($this->info['Password']);
    }
	function refresh() {
		unset($this->dblist);
		$this->User($this->userId);
		/*
        $sql = sprintf("SELECT UserId, Username, Password, Name, Email, UL, bEnabled
                        FROM User
                        WHERE UserId = '%s'",
                        mysql_escape_string($this->userId));
        $r = fetchRows(DBSelect($sql),'UserId');
        $this->info = count($r)?array_shift($r):$r;
		unset($this->dblist);
		$this->getDBList();
		*/
	}
    function exists() {
        return count($this->info);
    }
    function getUserId() {
        return $this->exists()?$this->info['UserId']:'';
    }
    function getUsername() {
        return $this->exists()?$this->info['Username']:'';
    }
    function isOverQuota() {
        return $this->exists()?($this->info['bOverQuota']>0?true:false):'';
    }
    function getBytes() {
        if($this->exists()) {
			$arr['nBytes'] = $this->info['nBytes'];
			$arr['nBytesSoft'] = $this->info['nBytesSoft'];
			$arr['nBytesHard'] = $this->info['nBytesHard'];
			return $arr;
		}
    }
	function setPassword($pwd) {
		$arr['Password'] = base64_encode($pwd);
        $sql = sprintf("UPDATE User %s WHERE UserId = '%s'",
                        buildSQLSet($arr), mysql_escape_string($this->getUserId()));
        DBUpdate($sql);
		$sql = sprintf('SET PASSWORD FOR \'%s\'@\'%%\'=PASSWORD(\'%s\')',
						mysql_escape_string($this->getUsername()),
						mysql_escape_string($pwd));
		DBSet($sql);
	}
	function signup($pwd) {
		$this->pass = $pwd;
		$arr['Password'] = base64_encode($pwd);
		$arr['bEnabled'] = 1;
		$arr['dSignup'] = 'NOW()';
        $sql = sprintf("UPDATE User %s WHERE UserId = '%s'",
                        buildSQLSet($arr), mysql_escape_string($this->getUserId()));
        DBUpdate($sql);

		$this->setUsage();
		$this->setAccess();
	}
	function setUsage($yes=true) {
		$verb = $yes?'GRANT':'REVOKE';
		$prep = $yes?'TO':'FROM';
		$suffix = $yes?sprintf("IDENTIFIED BY '%s'",mysql_escape_string($this->pass)):'';
		$sql = sprintf("%s USAGE ON * . * %s '%s'@'%s' %s",
						mysql_escape_string($verb),
						mysql_escape_string($prep),
						mysql_escape_string($this->getUsername()),
						'%',
						$suffix);
		DBGrant($sql);
	}
	function setAccess($db=null,$yes=true) {
		$verb = $yes?'GRANT':'REVOKE';
		$prep = $yes?'TO':'FROM';
		if (is_null($db)) {
			$dbs = $this->getDBList();
		} else {
			$dbs[] = array('Name'=>$db);
		}
		foreach($dbs as $db) {
			$name = $db['Name'];
			$sql = sprintf("%s ALL PRIVILEGES ON `%s` . * %s '%s'@'%s'",
							mysql_escape_string($verb),
							mysql_escape_string($name),
							mysql_escape_string($prep),
							mysql_escape_string($this->getUsername()),
							'%');
			DBGrant($sql);
		}
	}
	function getDBList() {
		if (isset($this->dblist)) {
			return $this->dblist;
		} else {
			//			LEFT JOIN DBQuota ON DBQuota.DatabaseId = DBOwner.DatabaseId
			$sql = sprintf("SELECT *
						FROM DBOwner
						INNER JOIN DB ON DB.DatabaseId = DBOwner.DatabaseId
						INNER JOIN DBQuota ON DBQuota.DatabaseId = DBOwner.DatabaseId
						WHERE DBOwner.UserId = '%s' AND DB.bEnabled=1",
						mysql_escape_string($this->getUserId()));
//			$r = fetchRows(DBSelect($sql),'DatabaseId');
			$r = fetchRows(DBSelect($sql),'Name');
			ksort($r);
			return $r;
		}
	}
	function addDB($name) {
		if (in_array($name, array_keys($this->getDBList()))) return false;
		if (!addDB($name, $this->getUserId())) return false;
		$this->setAccess($name);
		return true;
	}
	function delDB($name) {
		if (!in_array($name, array_keys($this->getDBList()))) return false;
		if (!delDB($name)) return false;//, $this->getUserId())) return false;
		$this->setAccess($name,false);
		return true;
	}
}


function isLoggedIn($aLogin=null) {
    if (is_null($aLogin)) {
        global $Login;
        $aLogin = $Login;
    }
    return !empty($aLogin) && is_a($aLogin, 'Login') && $aLogin->canLogin();
}

function isAdmin($aLogin=null) {
    if (is_null($aLogin)) {
        global $Login;
        $aLogin = $Login;
    }
    return !empty($aLogin) && is_a($aLogin, 'Login') && $aLogin->getUL()>=100;
}

function isImpersonating() {
	return isSess('_UserId') && isSess('UserId');
}

function impersonate($userId=null) {
	$wasImpersonating = isImpersonating();
	if ($wasImpersonating) {
		if (is_null($userId) || empty($userId)) {
			sess('UserId',sess('_UserId'));
			sess('_UserId','');
		} elseif ($userId>0) {
			sess('UserId',$userId);
		} else {
			return false;
		}
	} elseif (isLoggedIn()) {
		sess('_UserId',sess('UserId'));
		sess('UserId',$userId);
		return true;
	} else {
		return false;
	}
}

function isSSL() {
	return isset($_SERVER['SERVER_PORT'])?($_SERVER['SERVER_PORT'] == 443):false;
}

function getSSLCert() {
    if (DEVEL && file_exists('.forceauth')) {
        $fu = explode('|',file_get_contents('.forceauth'));
        $name = trim($fu[0]);
        $email = trim($fu[1]);
    } else {
        $name = isset($_SERVER['SSL_CLIENT_S_DN_CN'])?$_SERVER['SSL_CLIENT_S_DN_CN']:null;
        $email = isset($_SERVER['SSL_CLIENT_S_DN_Email'])?$_SERVER['SSL_CLIENT_S_DN_Email']:null;
    }
    if (!is_null($email)) {
        $user = explode('@',$email);
		$user = $user[0];
        return array('Username'=>$user, 'Name'=>$name, 'Email'=>$email);
	} else {
		return null;
	}
}

## 302 REDIRECTS

function redirect($target=null,$secure=null) {
    $base = (is_null($target)||substr($target,0,1)=='?')?$_SERVER['REDIRECT_URL']:(dirname($_SERVER['REDIRECT_URL']).'/');
    redirectFull(is_null($target)?$base:($base.$target),$secure);
}
function redirectStart() {
	redirectFull(BASE_URL,null);
}
function redirectFull($target,$secure) {
	redirect2((((isSSL()&&is_null($secure))||$secure==true)?'https://':'http://').$_SERVER['SERVER_NAME'].$target);
}
function redirect2($target) {
	header('Location: '.$target);
	exit;
}
function flipSSL() {
	return (isSSL()?'http://':'https://').$_SERVER['SERVER_NAME'].$_SERVER['REDIRECT_URL'];
}

## USER SCRIPTS

function addUser($sslCredentials) {
    global $_NEW_USER, $_NEW_USERQUOTA, $_NEW_USERSTAT;

    $arr = array_merge($sslCredentials, $_NEW_USER);
    $sql = sprintf("INSERT INTO User %s",
                    buildSQLInsert($arr));
    $UserId = DBInsert($sql);

	$arr = $_NEW_USERQUOTA;
	$arr['UserId'] = $UserId;
    $sql = sprintf("INSERT INTO UserQuota %s",
                    buildSQLInsert($arr));
	DBInsert($sql);

	$arr = $_NEW_USERSTAT;
	$arr['UserId'] = $UserId;
    $sql = sprintf("INSERT INTO UserStat %s",
                    buildSQLInsert($arr));
	DBInsert($sql);

	return $UserId;
}

function addDB($dbname,$userid) {
	global $_NEW_DB, $_NEW_DBQUOTA, $_NEW_DBOWNER;

	DBCreate(sprintf('CREATE DATABASE `%s`', mysql_escape_string($dbname)));

	$newdb['Name'] = $dbname;
	$arr = array_merge($newdb, $_NEW_DB);
	$arr['bEnabled'] = 1;
	$sql = sprintf("INSERT IGNORE INTO DB %s",
                    buildSQLInsert($arr));
	$DBId = DBInsert($sql);
	if (empty($DBId)) {
		$sql = sprintf("SELECT DatabaseId FROM DB WHERE Name = '%s'",
						mysql_escape_string($dbname));
		$r = fetchRows(DBSelect($sql), 'DatabaseId');
		if (count($r)) {
			$r = array_shift($r);
			$DBId = $r['DatabaseId'];
		} else {
			return false;
		}
		$sql = sprintf("UPDATE DB %s WHERE DB.DatabaseId = '%s'",
						buildSQLSet($arr),
						$DBId);
		DBUpdate($sql);
		return $DBId;
	} else {
		$arr = $_NEW_DBQUOTA;
		$arr['DatabaseId'] = $DBId;
		$sql = sprintf("INSERT IGNORE INTO DBQuota %s",
						buildSQLInsert($arr));
		DBInsert($sql);

		$arr = $_NEW_DBOWNER;
		$arr['DatabaseId'] = $DBId;
		$arr['UserId'] = $userid;
		$sql = sprintf("INSERT IGNORE INTO DBOwner %s",
						buildSQLInsert($arr));
		DBInsert($sql);

		return $DBId;
	}
}

function delDB($dbname) {
	global $_NEW_DB, $_NEW_DBQUOTA, $_NEW_DBOWNER;

	DBCreate(sprintf('DROP DATABASE `%s`', mysql_escape_string($dbname)));

	$arr['bEnabled'] = 0;
	$sql = sprintf("UPDATE DB %s WHERE DB.Name = '%s'",
					buildSQLSet($arr),
					$dbname);
	DBUpdate($sql);

	return true;
}

?>