用PHP实现一个高效安全的ftp服务器（二），php实现ftp服务器
- WBOY原創
- 2016-06-13 08:48:371154瀏覽
用PHP实现一个高效安全的ftp服务器（二），php实现ftp服务器
接前文。
1.实现用户类CUser。
用户的存储采用文本形式，将用户数组进行json编码。
<span>用户文件格式： </span>* <span>array</span><span>( </span>* 'user1' => <span>array</span><span>( </span>* 'pass'=>'', * 'group'=>'', * 'home'=>'/home/ftp/', <span>//</span><span>ftp主目录</span> * 'active'=><span>true</span>, * 'expired=>'2015-12-12'<span>, * </span>'description'=>''<span>, * </span>'email' => ''<span>, * </span>'folder'<span>=>array( * //可以列出主目录下的文件和目录，但不能创建和删除，也不能进入主目录下的目录 * //前1-5位是文件权限，6-9是文件夹权限,10是否继承(inherit) * array(</span>'path'=>'/home/ftp/','access'=>'RWANDLCNDI'<span>), * //可以列出/home/ftp/a/下的文件和目录,可以创建和删除，可以进入/home/ftp/a/下的子目录，可以创建和删除。 * array(</span>'path'=>'/home/ftp/a/','access'=>'RWAND-----'<span>), * ), * </span>'ip'<span>=>array( * </span>'allow'<span>=>array(ip1,ip2,...),//支持*通配符: 192.168.0.* * </span>'deny'<span>=>array(ip1,ip2,...) * ) * ) * ) * * 组文件格式： * array( * </span>'group1'<span>=>array( * </span>'home'=>'/home/ftp/dept1/'<span>, * </span>'folder'<span>=>array( * * ), * </span>'ip'<span>=>array( * </span>'allow'<span>=>array(ip1,ip2,...), * </span>'deny'<span>=>array(ip1,ip2,...) * ) * ) * )</span>
文件夹和文件的权限说明：
* 文件权限 * R读 : 允许用户读取（即下载）文件。该权限不允许用户列出目录内容，执行该操作需要列表权限。 * W写: 允许用户写入（即上传）文件。该权限不允许用户修改现有的文件，执行该操作需要追加权限。 * A追加: 允许用户向现有文件中追加数据。该权限通常用于使用户能够对部分上传的文件进行续传。 * N重命名: 允许用户重命名现有的文件。 * D删除: 允许用户删除文件。 * * 目录权限 * L列表: 允许用户列出目录中包含的文件。 * C创建: 允许用户在目录中新建子目录。 * N重命名: 允许用户在目录中重命名现有子目录。 * D删除: 允许用户在目录中删除现有子目录。注意： 如果目录包含文件，用户要删除目录还需要具有删除文件权限。 * * 子目录权限 * I继承: 允许所有子目录继承其父目录具有的相同权限。继承权限适用于大多数情况，但是如果访问必须受限于子文件夹，例如实施强制访问控制（Mandatory Access Control）时，则取消继承并为文件夹逐一授予权限。 *
实现代码如下：
class User{ const I = 1; // inherit const FD = 2; // folder delete const FN = 4; // folder rename const FC = 8; // folder create const FL = 16; // folder list const D = 32; // file delete const N = 64; // file rename const A = 128; // file append const W = 256; // file write (upload) const R = 512; // file read (download) private $hash_salt = ''; private $user_file; private $group_file; private $users = array(); private $groups = array(); private $file_hash = ''; public function __construct(){ $this->user_file = BASE_PATH.'/conf/users'; $this->group_file = BASE_PATH.'/conf/groups'; $this->reload(); } /** * 返回权限表达式 * @param int $access * @return string */ public static function AC($access){ $str = ''; $char = array('R','W','A','N','D','L','C','N','D','I'); for($i = 0; $i $i++){ if($access & pow(2,9-$i))$str.= $char[$i];else $str.= '-'; } return $str; } /** * 加载用户数据 */ public function reload(){ $user_file_hash = md5_file($this->user_file); $group_file_hash = md5_file($this->group_file); if($this->file_hash != md5($user_file_hash.$group_file_hash)){ if(($user = file_get_contents($this->user_file)) !== false){ $this->users = json_decode($user,true); if($this->users){ //folder排序 foreach ($this->users as $user=>$profile){ if(isset($profile['folder'])){ $this->users[$user]['folder'] = $this->sortFolder($profile['folder']); } } } } if(($group = file_get_contents($this->group_file)) !== false){ $this->groups = json_decode($group,true); if($this->groups){ //folder排序 foreach ($this->groups as $group=>$profile){ if(isset($profile['folder'])){ $this->groups[$group]['folder'] = $this->sortFolder($profile['folder']); } } } } $this->file_hash = md5($user_file_hash.$group_file_hash); } } /** * 对folder进行排序 * @return array */ private function sortFolder($folder){ uasort($folder, function($a,$b){ return strnatcmp($a['path'], $b['path']); }); $result = array(); foreach ($folder as $v){ $result[] = $v; } return $result; } /** * 保存用户数据 */ public function save(){ file_put_contents($this->user_file, json_encode($this->users),LOCK_EX); file_put_contents($this->group_file, json_encode($this->groups),LOCK_EX); } /** * 添加用户 * @param string $user * @param string $pass * @param string $home * @param string $expired * @param boolean $active * @param string $group * @param string $description * @param string $email * @return boolean */ public function addUser($user,$pass,$home,$expired,$active=true,$group='',$description='',$email = ''){ $user = strtolower($user); if(isset($this->users[$user]) || empty($user)){ return false; } $this->users[$user] = array( 'pass' => md5($user.$this->hash_salt.$pass), 'home' => $home, 'expired' => $expired, 'active' => $active, 'group' => $group, 'description' => $description, 'email' => $email, ); return true; } /** * 设置用户资料 * @param string $user * @param array $profile * @return boolean */ public function setUserProfile($user,$profile){ $user = strtolower($user); if(is_array($profile) && isset($this->users[$user])){ if(isset($profile['pass'])){ $profile['pass'] = md5($user.$this->hash_salt.$profile['pass']); } if(isset($profile['active'])){ if(!is_bool($profile['active'])){ $profile['active'] = $profile['active'] == 'true' ? true : false; } } $this->users[$user] = array_merge($this->users[$user],$profile); return true; } return false; } /** * 获取用户资料 * @param string $user * @return multitype:|boolean */ public function getUserProfile($user){ $user = strtolower($user); if(isset($this->users[$user])){ return $this->users[$user]; } return false; } /** * 删除用户 * @param string $user * @return boolean */ public function delUser($user){ $user = strtolower($user); if(isset($this->users[$user])){ unset($this->users[$user]); return true; } return false; } /** * 获取用户列表 * @return array */ public function getUserList(){ $list = array(); if($this->users){ foreach ($this->users as $user=>$profile){ $list[] = $user; } } sort($list); return $list; } /** * 添加组 * @param string $group * @param string $home * @return boolean */ public function addGroup($group,$home){ $group = strtolower($group); if(isset($this->groups[$group])){ return false; } $this->groups[$group] = array( 'home' => $home ); return true; } /** * 设置组资料 * @param string $group * @param array $profile * @return boolean */ public function setGroupProfile($group,$profile){ $group = strtolower($group); if(is_array($profile) && isset($this->groups[$group])){ $this->groups[$group] = array_merge($this->groups[$group],$profile); return true; } return false; } /** * 获取组资料 * @param string $group * @return multitype:|boolean */ public function getGroupProfile($group){ $group = strtolower($group); if(isset($this->groups[$group])){ return $this->groups[$group]; } return false; } /** * 删除组 * @param string $group * @return boolean */ public function delGroup($group){ $group = strtolower($group); if(isset($this->groups[$group])){ unset($this->groups[$group]); foreach ($this->users as $user => $profile){ if($profile['group'] == $group) $this->users[$user]['group'] = ''; } return true; } return false; } /** * 获取组列表 * @return array */ public function getGroupList(){ $list = array(); if($this->groups){ foreach ($this->groups as $group=>$profile){ $list[] = $group; } } sort($list); return $list; } /** * 获取组用户列表 * @param string $group * @return array */ public function getUserListOfGroup($group){ $list = array(); if(isset($this->groups[$group]) && $this->users){ foreach ($this->users as $user=>$profile){ if(isset($profile['group']) && $profile['group'] == $group){ $list[] = $user; } } } sort($list); return $list; } /** * 用户验证 * @param string $user * @param string $pass * @param string $ip * @return boolean */ public function checkUser($user,$pass,$ip = ''){ $this->reload(); $user = strtolower($user); if(isset($this->users[$user])){ if($this->users[$user]['active'] && time() strtotime($this->users[$user]['expired']) && $this->users[$user]['pass'] == md5($user.$this->hash_salt.$pass)){ if(empty($ip)){ return true; }else{ //ip验证 return $this->checkIP($user, $ip); } }else{ return false; } } return false; } /** * basic auth * @param string $base64 */ public function checkUserBasicAuth($base64){ $base64 = trim(str_replace('Basic ', '', $base64)); $str = base64_decode($base64); if($str !== false){ list($user,$pass) = explode(':', $str,2); $this->reload(); $user = strtolower($user); if(isset($this->users[$user])){ $group = $this->users[$user]['group']; if($group == 'admin' && $this->users[$user]['active'] && time() strtotime($this->users[$user]['expired']) && $this->users[$user]['pass'] == md5($user.$this->hash_salt.$pass)){ return true; }else{ return false; } } } return false; } /** * 用户登录ip验证 * @param string $user * @param string $ip * * 用户的ip权限继承组的IP权限。 * 匹配规则： * 1.进行组允许列表匹配； * 2.如同通过，进行组拒绝列表匹配； * 3.进行用户允许匹配 * 4.如果通过，进行用户拒绝匹配 * */ public function checkIP($user,$ip){ $pass = false; //先进行组验证 $group = $this->users[$user]['group']; //组允许匹配 if(isset($this->groups[$group]['ip']['allow'])){ foreach ($this->groups[$group]['ip']['allow'] as $addr){ $pattern = '/'.str_replace('*','\d+',str_replace('.', '\.', $addr)).'/'; if(preg_match($pattern, $ip) && !empty($addr)){ $pass = true; break; } } } //如果允许通过，进行拒绝匹配 if($pass){ if(isset($this->groups[$group]['ip']['deny'])){ foreach ($this->groups[$group]['ip']['deny'] as $addr){ $pattern = '/'.str_replace('*','\d+',str_replace('.', '\.', $addr)).'/'; if(preg_match($pattern, $ip) && !empty($addr)){ $pass = false; break; } } } } if(isset($this->users[$user]['ip']['allow'])){ foreach ($this->users[$user]['ip']['allow'] as $addr){ $pattern = '/'.str_replace('*','\d+',str_replace('.', '\.', $addr)).'/'; if(preg_match($pattern, $ip) && !empty($addr)){ $pass = true; break; } } } if($pass){ if(isset($this->users[$user]['ip']['deny'])){ foreach ($this->users[$user]['ip']['deny'] as $addr){ $pattern = '/'.str_replace('*','\d+',str_replace('.', '\.', $addr)).'/'; if(preg_match($pattern, $ip) && !empty($addr)){ $pass = false; break; } } } } echo date('Y-m-d H:i:s')." [debug]\tIP ACCESS:".' '.($pass?'true':'false')."\n"; return $pass; } /** * 获取用户主目录 * @param string $user * @return string */ public function getHomeDir($user){ $user = strtolower($user); $group = $this->users[$user]['group']; $dir = ''; if($group){ if(isset($this->groups[$group]['home']))$dir = $this->groups[$group]['home']; } $dir = !empty($this->users[$user]['home'])?$this->users[$user]['home']:$dir; return $dir; } //文件权限判断 public function isReadable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][0] == 'R'; }else{ return $result['access'][0] == 'R' && $result['access'][9] == 'I'; } } public function isWritable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][1] == 'W'; }else{ return $result['access'][1] == 'W' && $result['access'][9] == 'I'; } } public function isAppendable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][2] == 'A'; }else{ return $result['access'][2] == 'A' && $result['access'][9] == 'I'; } } public function isRenamable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][3] == 'N'; }else{ return $result['access'][3] == 'N' && $result['access'][9] == 'I'; } } public function isDeletable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][4] == 'D'; }else{ return $result['access'][4] == 'D' && $result['access'][9] == 'I'; } } //目录权限判断 public function isFolderListable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][5] == 'L'; }else{ return $result['access'][5] == 'L' && $result['access'][9] == 'I'; } } public function isFolderCreatable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][6] == 'C'; }else{ return $result['access'][6] == 'C' && $result['access'][9] == 'I'; } } public function isFolderRenamable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][7] == 'N'; }else{ return $result['access'][7] == 'N' && $result['access'][9] == 'I'; } } public function isFolderDeletable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][8] == 'D'; }else{ return $result['access'][8] == 'D' && $result['access'][9] == 'I'; } } /** * 获取目录权限 * @param string $user * @param string $path * @return array * 进行最长路径匹配 * * 返回： * array( * 'access'=>目前权限 * ,'isExactMatch'=>是否精确匹配 * * ); * * 如果精确匹配，则忽略inherit. * 否则应判断是否继承父目录的权限， * 权限位表： * +---+---+---+---+---+---+---+---+---+---+ * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | * +---+---+---+---+---+---+---+---+---+---+ * | R | W | A | N | D | L | C | N | D | I | * +---+---+---+---+---+---+---+---+---+---+ * | FILE | FOLDER | * +-------------------+-------------------+ */ public function getPathAccess($user,$path){ $this->reload(); $user = strtolower($user); $group = $this->users[$user]['group']; //去除文件名称 $path = str_replace(substr(strrchr($path, '/'),1),'',$path); $access = self::AC(0); $isExactMatch = false; if($group){ if(isset($this->groups[$group]['folder'])){ foreach ($this->groups[$group]['folder'] as $f){ //中文处理 $t_path = iconv('UTF-8','GB18030',$f['path']); if(strpos($path, $t_path) === 0){ $access = $f['access']; $isExactMatch = ($path == $t_path?true:false); } } } } if(isset($this->users[$user]['folder'])){ foreach ($this->users[$user]['folder'] as $f){ //中文处理 $t_path = iconv('UTF-8','GB18030',$f['path']); if(strpos($path, $t_path) === 0){ $access = $f['access']; $isExactMatch = ($path == $t_path?true:false); } } } echo date('Y-m-d H:i:s')." [debug]\tACCESS:$access ".' '.($isExactMatch?'1':'0')." $path\n"; return array('access'=>$access,'isExactMatch'=>$isExactMatch); } /** * 添加在线用户 * @param ShareMemory $shm * @param swoole_server $serv * @param unknown $user * @param unknown $fd * @param unknown $ip * @return Ambigous
2.共享内存操作类
这个相对简单，使用php的shmop扩展即可。
class ShareMemory{ private $mode = 0644; private $shm_key; private $shm_size; /** * 构造函数 */ public function __construct(){ $key = 'F'; $size = 1024*1024; $this->shm_key = ftok(__FILE__,$key); $this->shm_size = $size + 1; } /** * 读取内存数组 * @return array|boolean */ public function read(){ if(($shm_id = shmop_open($this->shm_key,'c',$this->mode,$this->shm_size)) !== false){ $str = shmop_read($shm_id,1,$this->shm_size-1); shmop_close($shm_id); if(($i = strpos($str,"\0")) !== false)$str = substr($str,0,$i); if($str){ return json_decode($str,true); }else{ return array(); } } return false; } /** * 写入数组到内存 * @param array $arr * @return int|boolean */ public function write($arr){ if(!is_array($arr))return false; $str = json_encode($arr)."\0"; if(strlen($str) > $this->shm_size) return false; if(($shm_id = shmop_open($this->shm_key,'c',$this->mode,$this->shm_size)) !== false){ $count = shmop_write($shm_id,$str,1); shmop_close($shm_id); return $count; } return false; } /** * 删除内存块，下次使用时将重新开辟内存块 * @return boolean */ public function delete(){ if(($shm_id = shmop_open($this->shm_key,'c',$this->mode,$this->shm_size)) !== false){ $result = shmop_delete($shm_id); shmop_close($shm_id); return $result; } return false; } } View Code
3.内置的web服务器类
这个主要是嵌入在ftp的http服务器类，功能不是很完善，进行ftp的管理还是可行的。不过需要注意的是，这个实现与apache等其他http服务器运行的方式可能有所不同。代码是驻留内存的。
class CWebServer{ protected $buffer_header = array(); protected $buffer_maxlen = 65535; //最大POST尺寸 const DATE_FORMAT_HTTP = 'D, d-M-Y H:i:s T'; const HTTP_EOF = "\r\n\r\n"; const HTTP_HEAD_MAXLEN = 8192; //http头最大长度不得超过2k const HTTP_POST_MAXLEN = 1048576;//1m const ST_FINISH = 1; //完成，进入处理流程 const ST_WAIT = 2; //等待数据 const ST_ERROR = 3; //错误，丢弃此包 private $requsts = array(); private $config = array(); public function log($msg,$level = 'debug'){ echo date('Y-m-d H:i:s').' ['.$level."]\t" .$msg."\n"; } public function __construct($config = array()){ $this->config = array( 'wwwroot' => __DIR__.'/wwwroot/', 'index' => 'index.php', 'path_deny' => array('/protected/'), ); } public function onReceive($serv,$fd,$data){ $ret = $this->checkData($fd, $data); switch ($ret){ case self::ST_ERROR: $serv->close($fd); $this->cleanBuffer($fd); $this->log('Recevie error.'); break; case self::ST_WAIT: $this->log('Recevie wait.'); return; default: break; } //开始完整的请求 $request = $this->requsts[$fd]; $info = $serv->connection_info($fd); $request = $this->parseRequest($request); $request['remote_ip'] = $info['remote_ip']; $response = $this->onRequest($request); $output = $this->parseResponse($request,$response); $serv->send($fd,$output); if(isset($request['head']['Connection']) && strtolower($request['head']['Connection']) == 'close'){ $serv->close($fd); } unset($this->requsts[$fd]); $_REQUEST = $_SESSION = $_COOKIE = $_FILES = $_POST = $_SERVER = $_GET = array(); } /** * 处理请求 * @param array $request * @return array $response * * $request=array( * 'time'=> * 'head'=>array( * 'method'=> * 'path'=> * 'protocol'=> * 'uri'=> * //other http header * '..'=>value * ) * 'body'=> * 'get'=>(if appropriate) * 'post'=>(if appropriate) * 'cookie'=>(if appropriate) * * * ) */ public function onRequest($request){ if($request['head']['path'][strlen($request['head']['path']) - 1] == '/'){ $request['head']['path'] .= $this->config['index']; } $response = $this->process($request); return $response; } /** * 清除数据 * @param unknown $fd */ public function cleanBuffer($fd){ unset($this->requsts[$fd]); unset($this->buffer_header[$fd]); } /** * 检查数据 * @param unknown $fd * @param unknown $data * @return string */ public function checkData($fd,$data){ if(isset($this->buffer_header[$fd])){ $data = $this->buffer_header[$fd].$data; } $request = $this->checkHeader($fd, $data); //请求头错误 if($request === false){ $this->buffer_header[$fd] = $data; if(strlen($data) > self::HTTP_HEAD_MAXLEN){ return self::ST_ERROR; }else{ return self::ST_WAIT; } } //post请求检查 if($request['head']['method'] == 'POST'){ return $this->checkPost($request); }else{ return self::ST_FINISH; } } /** * 检查请求头 * @param unknown $fd * @param unknown $data * @return boolean|array */ public function checkHeader($fd, $data){ //新的请求 if(!isset($this->requsts[$fd])){ //http头结束符 $ret = strpos($data,self::HTTP_EOF); if($ret === false){ return false; }else{ $this->buffer_header[$fd] = ''; $request = array(); list($header,$request['body']) = explode(self::HTTP_EOF, $data,2); $request['head'] = $this->parseHeader($header); $this->requsts[$fd] = $request; if($request['head'] == false){ return false; } } }else{ //post 数据合并 $request = $this->requsts[$fd]; $request['body'] .= $data; } return $request; } /** * 解析请求头 * @param string $header * @return array * array( * 'method'=>, * 'uri'=> * 'protocol'=> * 'name'=>value,... * * * * } */ public function parseHeader($header){ $request = array(); $headlines = explode("\r\n", $header); list($request['method'],$request['uri'],$request['protocol']) = explode(' ', $headlines[0],3); foreach ($headlines as $k=>$line){ $line = trim($line); if($k && !empty($line) && strpos($line,':') !== false){ list($name,$value) = explode(':', $line,2); $request[trim($name)] = trim($value); } } return $request; } /** * 检查post数据是否完整 * @param unknown $request * @return string */ public function checkPost($request){ if(isset($request['head']['Content-Length'])){ if(intval($request['head']['Content-Length']) > self::HTTP_POST_MAXLEN){ return self::ST_ERROR; } if(intval($request['head']['Content-Length']) > strlen($request['body'])){ return self::ST_WAIT; }else{ return self::ST_FINISH; } } return self::ST_ERROR; } /** * 解析请求 * @param unknown $request * @return Ambigous
陳述：
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