|
- <?php if(!defined('DEDEINC')) exit("Request Error!");
- /**
- * 数据库类
- * 说明:系统底层数据库核心类
- * 调用这个类前,请先设定这些外部变量
- * $GLOBALS['cfg_dbhost'];
- * $GLOBALS['cfg_dbuser'];
- * $GLOBALS['cfg_dbpwd'];
- * $GLOBALS['cfg_dbname'];
- * $GLOBALS['cfg_dbprefix'];
- *
- * @version $Id: dedesql.class.php 3 20:57 2010年7月7日Z tianya $
- * @package DedeCMS.Libraries
- * @copyright Copyright (c) 2020, DedeBIZ.COM
- * @license https://www.dedebiz.com/license
- * @link https://www.dedebiz.com
- */
-
- // 在工程所有文件中均不需要单独初始化这个类,可直接用 $dsql 或 $db 进行操作
- // 为了防止错误,操作完后不必关闭数据库
- $dsql = $db = new DedeSql(FALSE);
- /**
- * Dede数据库类
- *
- * @package DedeSql
- * @subpackage DedeCMS.Libraries
- * @link http://www.dedecms.com
- */
- class DedeSql
- {
- var $linkID;
- var $dbHost;
- var $dbUser;
- var $dbPwd;
- var $dbName;
- var $dbPrefix;
- var $result;
- var $queryString;
- var $parameters;
- var $isClose;
- var $safeCheck;
- var $recordLog=false; // 记录日志到data/mysqli_record_log.inc便于进行调试
- var $isInit=false;
- var $pconnect=false;
-
- //用外部定义的变量初始类,并连接数据库
- function __construct($pconnect=FALSE,$nconnect=FALSE)
- {
- $this->isClose = FALSE;
- $this->safeCheck = TRUE;
- $this->pconnect = $pconnect;
- if($nconnect)
- {
- $this->Init($pconnect);
- }
- }
-
- function DedeSql($pconnect=FALSE,$nconnect=TRUE)
- {
- $this->__construct($pconnect,$nconnect);
- }
-
- function Init($pconnect=FALSE)
- {
- $this->linkID = 0;
- //$this->queryString = '';
- //$this->parameters = Array();
- $this->dbHost = $GLOBALS['cfg_dbhost'];
- $this->dbUser = $GLOBALS['cfg_dbuser'];
- $this->dbPwd = $GLOBALS['cfg_dbpwd'];
- $this->dbName = $GLOBALS['cfg_dbname'];
- $this->dbPrefix = $GLOBALS['cfg_dbprefix'];
- $this->result["me"] = 0;
- $this->Open($pconnect);
- }
-
- //用指定参数初始数据库信息
- function SetSource($host,$username,$pwd,$dbname,$dbprefix="dede_")
- {
- $this->dbHost = $host;
- $this->dbUser = $username;
- $this->dbPwd = $pwd;
- $this->dbName = $dbname;
- $this->dbPrefix = $dbprefix;
- $this->result["me"] = 0;
- }
- function SelectDB($dbname)
- {
- mysql_select_db($dbname, $this->linkID);
- }
-
- //设置SQL里的参数
- function SetParameter($key,$value)
- {
- $this->parameters[$key]=$value;
- }
-
- //连接数据库
- function Open($pconnect=FALSE)
- {
- global $dsql;
- //连接数据库
- if($dsql && !$dsql->isClose && $dsql->isInit)
- {
- $this->linkID = $dsql->linkID;
- }
- else
- {
- $i = 0;
-
- while (!$this->linkID)
- {
- if ($i > 100) break;
-
- if(!$pconnect)
- {
- $this->linkID = @mysql_connect($this->dbHost,$this->dbUser,$this->dbPwd);
- }
- else
- {
- $this->linkID = @mysql_pconnect($this->dbHost,$this->dbUser,$this->dbPwd);
- }
- $i++;
- }
-
- //复制一个对象副本
- CopySQLPoint($this);
- }
-
- //处理错误,成功连接则选择数据库
- if(!$this->linkID)
- {
- $this->DisplayError("DedeCMS错误警告:<font color='red'>连接数据库失败,可能数据库密码不对或数据库服务器出错!</font>");
- exit();
- }
- $this->isInit = TRUE;
- @mysql_select_db($this->dbName, $this->linkID);
- $mysqlver = explode('.',$this->GetVersion());
- $mysqlver = $mysqlver[0].'.'.$mysqlver[1];
-
- if($mysqlver>4.0)
- {
- @mysql_query("SET NAMES '".$GLOBALS['cfg_db_language']."', character_set_client=binary, sql_mode='', interactive_timeout=3600 ;", $this->linkID);
- }
-
- return TRUE;
- }
-
- //为了防止采集等需要较长运行时间的程序超时,在运行这类程序时设置系统等待和交互时间
- function SetLongLink()
- {
- @mysql_query("SET interactive_timeout=3600, wait_timeout=3600 ;", $this->linkID);
- }
-
- //获得错误描述
- function GetError()
- {
- $str = mysql_error();
- return $str;
- }
-
- //关闭数据库
- //mysql能自动管理非持久连接的连接池
- //实际上关闭并无意义并且容易出错,所以取消这函数
- function Close($isok=FALSE)
- {
- $this->FreeResultAll();
- if($isok)
- {
- @mysql_close($this->linkID);
- $this->isClose = TRUE;
- $GLOBALS['dsql'] = NULL;
- }
- }
-
- //定期清理死连接
- function ClearErrLink()
- {
- }
-
- //关闭指定的数据库连接
- function CloseLink($dblink)
- {
- @mysql_close($dblink);
- }
-
- function Esc( $_str )
- {
- if ( version_compare( phpversion(), '4.3.0', '>=' ) )
- {
- return @mysql_real_escape_string( $_str );
- } else {
- return @mysql_escape_string( $_str );
- }
- }
-
- //执行一个不返回结果的SQL语句,如update,delete,insert等
- function ExecuteNoneQuery($sql='')
- {
- global $dsql;
- if(!$dsql->isInit)
- {
- $this->Init($this->pconnect);
- }
- if($dsql->isClose)
- {
- $this->Open(FALSE);
- $dsql->isClose = FALSE;
- }
- if(!empty($sql))
- {
- $this->SetQuery($sql);
- }else{
- return FALSE;
- }
- if(is_array($this->parameters))
- {
- foreach($this->parameters as $key=>$value)
- {
- $this->queryString = str_replace("@".$key,"'$value'",$this->queryString);
- }
- }
- //SQL语句安全检查
- if($this->safeCheck) CheckSql($this->queryString,'update');
- $t1 = ExecTime();
- $rs = mysql_query($this->queryString,$this->linkID);
-
- //查询性能测试
- if($this->recordLog) {
- $queryTime = ExecTime() - $t1;
- $this->RecordLog($queryTime);
- //echo $this->queryString."--{$queryTime}<hr />\r\n";
- }
- return $rs;
- }
-
-
- //执行一个返回影响记录条数的SQL语句,如update,delete,insert等
- function ExecuteNoneQuery2($sql='')
- {
- global $dsql;
- if(!$dsql->isInit)
- {
- $this->Init($this->pconnect);
- }
- if($dsql->isClose)
- {
- $this->Open(FALSE);
- $dsql->isClose = FALSE;
- }
-
- if(!empty($sql))
- {
- $this->SetQuery($sql);
- }
- if(is_array($this->parameters))
- {
- foreach($this->parameters as $key=>$value)
- {
- $this->queryString = str_replace("@".$key,"'$value'",$this->queryString);
- }
- }
- $t1 = ExecTime();
- mysql_query($this->queryString,$this->linkID);
-
- //查询性能测试
- if($this->recordLog) {
- $queryTime = ExecTime() - $t1;
- $this->RecordLog($queryTime);
- //echo $this->queryString."--{$queryTime}<hr />\r\n";
- }
-
- return mysql_affected_rows($this->linkID);
- }
-
- function ExecNoneQuery($sql='')
- {
- return $this->ExecuteNoneQuery($sql);
- }
-
- function GetFetchRow($id='me')
- {
- return @mysql_fetch_row($this->result[$id]);
- }
-
- function GetAffectedRows()
- {
- return mysql_affected_rows($this->linkID);
- }
-
- //执行一个带返回结果的SQL语句,如SELECT,SHOW等
- function Execute($id="me", $sql='')
- {
- global $dsql;
- if(!$dsql->isInit)
- {
- $this->Init($this->pconnect);
- }
- if($dsql->isClose)
- {
- $this->Open(FALSE);
- $dsql->isClose = FALSE;
- }
- if(!empty($sql))
- {
- $this->SetQuery($sql);
- }
-
- //SQL语句安全检查
- if($this->safeCheck)
- {
- CheckSql($this->queryString);
- }
-
- $t1 = ExecTime();
-
- $this->result[$id] = mysql_query($this->queryString,$this->linkID);
-
- if($this->recordLog) {
- $queryTime = ExecTime() - $t1;
- $this->RecordLog($queryTime);
- }
-
- if(!empty($this->result[$id]) && $this->result[$id]===FALSE)
- {
- $this->DisplayError(mysql_error()." <br />Error sql: <font color='red'>".$this->queryString."</font>");
- }
- }
-
- function Query($id="me",$sql='')
- {
- $this->Execute($id,$sql);
- }
-
- //执行一个SQL语句,返回前一条记录或仅返回一条记录
- function GetOne($sql='',$acctype=MYSQL_ASSOC)
- {
- global $dsql;
- if(!$dsql->isInit)
- {
- $this->Init($this->pconnect);
- }
- if($dsql->isClose)
- {
- $this->Open(FALSE);
- $dsql->isClose = FALSE;
- }
- if(!empty($sql))
- {
- if(!preg_match("/LIMIT/i",$sql)) $this->SetQuery(preg_replace("/[,;]$/i", '', trim($sql))." LIMIT 0,1;");
- else $this->SetQuery($sql);
- }
- $this->Execute("one");
- $arr = $this->GetArray("one",$acctype);
- if(!is_array($arr))
- {
- return '';
- }
- else
- {
- @mysql_free_result($this->result["one"]); return($arr);
- }
- }
-
- //执行一个不与任何表名有关的SQL语句,Create等
- function ExecuteSafeQuery($sql,$id="me")
- {
- global $dsql;
- if(!$dsql->isInit)
- {
- $this->Init($this->pconnect);
- }
- if($dsql->isClose)
- {
- $this->Open(FALSE);
- $dsql->isClose = FALSE;
- }
- $this->result[$id] = @mysql_query($sql,$this->linkID);
- }
-
- //返回当前的一条记录并把游标移向下一记录
- // MYSQL_ASSOC、MYSQL_NUM、MYSQL_BOTH
- function GetArray($id="me",$acctype=MYSQL_ASSOC)
- {
- if($this->result[$id]==0)
- {
- return FALSE;
- }
- else
- {
- return mysql_fetch_array($this->result[$id],$acctype);
- }
- }
-
- function GetObject($id="me")
- {
- if($this->result[$id]==0)
- {
- return FALSE;
- }
- else
- {
- return mysql_fetch_object($this->result[$id]);
- }
- }
-
- // 检测是否存在某数据表
- function IsTable($tbname)
- {
- global $dsql;
- if(!$dsql->isInit)
- {
- $this->Init($this->pconnect);
- }
- $prefix="#@__";
- $tbname = str_replace($prefix, $GLOBALS['cfg_dbprefix'], $tbname);
- if( mysql_num_rows( @mysql_query("SHOW TABLES LIKE '".$tbname."'", $this->linkID)))
- {
- return TRUE;
- }
- return FALSE;
- }
-
- //获得MySql的版本号
- function GetVersion($isformat=TRUE)
- {
- global $dsql;
- if(!$dsql->isInit)
- {
- $this->Init($this->pconnect);
- }
- if($dsql->isClose)
- {
- $this->Open(FALSE);
- $dsql->isClose = FALSE;
- }
-
- $rs = @mysql_query("SELECT VERSION();",$this->linkID);
- $row = @mysql_fetch_array($rs);
- $mysql_version = $row[0];
- @mysql_free_result($rs);
- if($isformat)
- {
- $mysql_versions = explode(".",trim($mysql_version));
- $mysql_version = number_format($mysql_versions[0].".".$mysql_versions[1],2);
- }
- return $mysql_version;
- }
-
- //获取特定表的信息
- function GetTableFields($tbname,$id="me")
- {
- global $dsql;
- if(!$dsql->isInit)
- {
- $this->Init($this->pconnect);
- }
- $this->result[$id] = mysql_list_fields($this->dbName,$tbname,$this->linkID);
- }
-
- //获取字段详细信息
- function GetFieldObject($id="me")
- {
- return mysql_fetch_field($this->result[$id]);
- }
-
- //获得查询的总记录数
- function GetTotalRow($id="me")
- {
- if($this->result[$id]==0)
- {
- return -1;
- }
- else
- {
- return mysql_num_rows($this->result[$id]);
- }
- }
-
- //获取上一步INSERT操作产生的ID
- function GetLastID()
- {
- //如果 AUTO_INCREMENT 的列的类型是 BIGINT,则 mysql_insert_id() 返回的值将不正确。
- //可以在 SQL 查询中用 MySQL 内部的 SQL 函数 LAST_INSERT_ID() 来替代。
- //$rs = mysql_query("Select LAST_INSERT_ID() as lid",$this->linkID);
- //$row = mysql_fetch_array($rs);
- //return $row["lid"];
- return mysql_insert_id($this->linkID);
- }
-
- //释放记录集占用的资源
- function FreeResult($id="me")
- {
- @mysql_free_result($this->result[$id]);
- }
- function FreeResultAll()
- {
- if(!is_array($this->result))
- {
- return '';
- }
- foreach($this->result as $kk => $vv)
- {
- if($vv)
- {
- @mysql_free_result($vv);
- }
- }
- }
-
- //设置SQL语句,会自动把SQL语句里的#@__替换为$this->dbPrefix(在配置文件中为$cfg_dbprefix)
- function SetQuery($sql)
- {
- $prefix="#@__";
- $sql = str_replace($prefix,$GLOBALS['cfg_dbprefix'],$sql);
- $this->queryString = $sql;
- }
-
- function SetSql($sql)
- {
- $this->SetQuery($sql);
- }
-
- function RecordLog($runtime=0)
- {
- $RecordLogFile = dirname(__FILE__).'/../data/mysqli_record_log.inc';
- $url = $this->GetCurUrl();
- $savemsg = <<<EOT
-
- ------------------------------------------
- SQL:{$this->queryString}
- Page:$url
- Runtime:$runtime
- EOT;
- $fp = @fopen($RecordLogFile, 'a');
- @fwrite($fp, $savemsg);
- @fclose($fp);
- }
-
- //显示数据链接错误信息
- function DisplayError($msg)
- {
- $errorTrackFile = dirname(__FILE__).'/../data/mysql_error_trace.inc';
- if( file_exists(dirname(__FILE__).'/../data/mysql_error_trace.php') )
- {
- @unlink(dirname(__FILE__).'/../data/mysql_error_trace.php');
- }
- $emsg = '';
- $emsg .= "<div><h3>DedeCMS Error Warning!</h3>\r\n";
- $emsg .= "<div><a href='http://bbs.dedecms.com' target='_blank' style='color:red'>Technical Support: http://bbs.dedecms.com</a></div>";
- $emsg .= "<div style='line-helght:160%;font-size:14px;color:green'>\r\n";
- $emsg .= "<div style='color:blue'><br />Error page: <font color='red'>".$this->GetCurUrl()."</font></div>\r\n";
- $emsg .= "<div>Error infos: {$msg}</div>\r\n";
- $emsg .= "<br /></div></div>\r\n";
-
- echo $emsg;
-
- $savemsg = 'Page: '.$this->GetCurUrl()."\r\nError: ".$msg."\r\nTime".date('Y-m-d H:i:s');
- //保存MySql错误日志
- $fp = @fopen($errorTrackFile, 'a');
- @fwrite($fp, '<'.'?php exit();'."\r\n/*\r\n{$savemsg}\r\n*/\r\n?".">\r\n");
- @fclose($fp);
- }
-
- //获得当前的脚本网址
- function GetCurUrl()
- {
- if(!empty($_SERVER["REQUEST_URI"]))
- {
- $scriptName = $_SERVER["REQUEST_URI"];
- $nowurl = $scriptName;
- }
- else
- {
- $scriptName = $_SERVER["PHP_SELF"];
- if(empty($_SERVER["QUERY_STRING"])) {
- $nowurl = $scriptName;
- }
- else {
- $nowurl = $scriptName."?".$_SERVER["QUERY_STRING"];
- }
- }
- return $nowurl;
- }
-
- }
-
- $arrs1 = array(0x63,0x66,0x67,0x5f,0x70,0x6f,0x77,0x65,0x72,0x62,0x79);
- $arrs2 = array(0x20,0x3c,0x61,0x20,0x68,0x72,0x65,0x66,0x3d,0x68,0x74,0x74,0x70,0x3a,0x2f,0x2f,
- 0x77,0x77,0x77,0x2e,0x64,0x65,0x64,0x65,0x63,0x6d,0x73,0x2e,0x63,0x6f,0x6d,0x20,0x74,0x61,0x72,
- 0x67,0x65,0x74,0x3d,0x27,0x5f,0x62,0x6c,0x61,0x6e,0x6b,0x27,0x3e,0x50,0x6f,0x77,0x65,0x72,0x20,
- 0x62,0x79,0x20,0x44,0x65,0x64,0x65,0x43,0x6d,0x73,0x3c,0x2f,0x61,0x3e);
-
- //特殊操作
- if(isset($GLOBALS['arrs1']))
- {
- $v1 = $v2 = '';
- for($i=0;isset($arrs1[$i]);$i++)
- {
- $v1 .= chr($arrs1[$i]);
- }
- for($i=0;isset($arrs2[$i]);$i++)
- {
- $v2 .= chr($arrs2[$i]);
- }
- $GLOBALS[$v1] .= $v2;
- }
-
- //复制一个对象副本
- function CopySQLPoint(&$ndsql)
- {
- $GLOBALS['dsql'] = $ndsql;
- }
-
- //SQL语句过滤程序,由80sec提供,这里作了适当的修改
- if (!function_exists('CheckSql'))
- {
- function CheckSql($db_string,$querytype='select')
- {
- global $cfg_cookie_encode;
- $clean = '';
- $error='';
- $old_pos = 0;
- $pos = -1;
- $log_file = DEDEINC.'/../data/'.md5($cfg_cookie_encode).'_safe.txt';
- $userIP = GetIP();
- $getUrl = GetCurUrl();
-
- //如果是普通查询语句,直接过滤一些特殊语法
- if($querytype=='select')
- {
- $notallow1 = "[^0-9a-z@\._-]{1,}(union|sleep|benchmark|load_file|outfile)[^0-9a-z@\.-]{1,}";
-
- //$notallow2 = "--|/\*";
- if(preg_match("/".$notallow1."/i", $db_string))
- {
- fputs(fopen($log_file,'a+'),"$userIP||$getUrl||$db_string||SelectBreak\r\n");
- exit("<font size='5' color='red'>Safe Alert: Request Error step 1 !</font>");
- }
- }
-
- //完整的SQL检查
- while (TRUE)
- {
- $pos = strpos($db_string, '\'', $pos + 1);
- if ($pos === FALSE)
- {
- break;
- }
- $clean .= substr($db_string, $old_pos, $pos - $old_pos);
- while (TRUE)
- {
- $pos1 = strpos($db_string, '\'', $pos + 1);
- $pos2 = strpos($db_string, '\\', $pos + 1);
- if ($pos1 === FALSE)
- {
- break;
- }
- elseif ($pos2 == FALSE || $pos2 > $pos1)
- {
- $pos = $pos1;
- break;
- }
- $pos = $pos2 + 1;
- }
- $clean .= '$s$';
- $old_pos = $pos + 1;
- }
- $clean .= substr($db_string, $old_pos);
- $clean = trim(strtolower(preg_replace(array('~\s+~s' ), array(' '), $clean)));
-
- if (strpos($clean, '@') !== FALSE OR strpos($clean,'char(')!== FALSE OR strpos($clean,'"')!== FALSE
- OR strpos($clean,'$s$$s$')!== FALSE)
- {
- $fail = TRUE;
- if(preg_match("#^create table#i",$clean)) $fail = FALSE;
- $error="unusual character";
- }
-
- //老版本的Mysql并不支持union,常用的程序里也不使用union,但是一些黑客使用它,所以检查它
- if (strpos($clean, 'union') !== FALSE && preg_match('~(^|[^a-z])union($|[^[a-z])~is', $clean) != 0)
- {
- $fail = TRUE;
- $error="union detect";
- }
-
- //发布版本的程序可能比较少包括--,#这样的注释,但是黑客经常使用它们
- elseif (strpos($clean, '/*') > 2 || strpos($clean, '--') !== FALSE || strpos($clean, '#') !== FALSE)
- {
- $fail = TRUE;
- $error="comment detect";
- }
-
- //这些函数不会被使用,但是黑客会用它来操作文件,down掉数据库
- elseif (strpos($clean, 'sleep') !== FALSE && preg_match('~(^|[^a-z])sleep($|[^[a-z])~is', $clean) != 0)
- {
- $fail = TRUE;
- $error="slown down detect";
- }
- elseif (strpos($clean, 'benchmark') !== FALSE && preg_match('~(^|[^a-z])benchmark($|[^[a-z])~is', $clean) != 0)
- {
- $fail = TRUE;
- $error="slown down detect";
- }
- elseif (strpos($clean, 'load_file') !== FALSE && preg_match('~(^|[^a-z])load_file($|[^[a-z])~is', $clean) != 0)
- {
- $fail = TRUE;
- $error="file fun detect";
- }
- elseif (strpos($clean, 'into outfile') !== FALSE && preg_match('~(^|[^a-z])into\s+outfile($|[^[a-z])~is', $clean) != 0)
- {
- $fail = TRUE;
- $error="file fun detect";
- }
-
- //老版本的MYSQL不支持子查询,我们的程序里可能也用得少,但是黑客可以使用它来查询数据库敏感信息
- elseif (preg_match('~\([^)]*?select~is', $clean) != 0)
- {
- $fail = TRUE;
- $error="sub select detect";
- }
- if (!empty($fail))
- {
- fputs(fopen($log_file,'a+'),"$userIP||$getUrl||$db_string||$error\r\n");
- exit("<font size='5' color='red'>Safe Alert: Request Error step 2!</font>");
- }
- else
- {
- return $db_string;
- }
- }
- }
|