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php中使用sftp教程,php使用sftp教程
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php中使用sftp教程,php使用sftp教程

Jun 13, 2016 am 09:08 AM
php sftp

php中使用sftp教程,php使用sftp教程

<&#63;php 


/**
php 中的sftp 使用教程 
Telnet、FTP、SSH、SFTP、SSL 
(一) ftp 协议简介 

	FTP(File Transfer Protocol,文件传输协议)是互联网上常用的协议之一,人们用FTP实现互连网上的文件传输。
如同其他的很多通讯协议,FTP通讯协议也采用客户机 / 服务器(Client / Server )架构。用户可以通过各种不同的FTP客户端程序,
借助FTP协议,来连接FTP服务器,以上传或者下载文件FTP的命令传输和数据传输是通过不同的端口进行传输的
FTP是TCP/IP的一种具体应用,它工作在OSI模型的第七层,TCP模型的第四层上,即应用层,使用TCP传输而不是UDP,
这样FTP客户在和服 务器建立连接前就要经过一个被广为熟知的"三次握手"的过程,它带来的意义在于客户与服务器之间的连接是可靠的,
而且是面向连接,为数据的传输提供了可靠 的保证。

(二)ssh协议 

	ssh 的全称为 SecureShell  ,可以报所有的传输数据惊醒加密,这样'中间人'就不能获得我们传输的数据
同事,传输的数据是经过压缩的,可以加快传输的速度.ssh有很多功能,可以替代telnet 也可也为ftppop ,提供一个安全的通道 

  SSH协议框架中最主要的部分是三个协议:
 
* 传输层协议(The Transport Layer Protocol)提供服务器认证,数据机密性,信息完整性 等的支持;
* 用户认证协议(The User Authentication Protocol) 则为服务器提供客户端的身份鉴别;
* 连接协议(The Connection Protocol) 将加密的信息隧道复用成若干个逻辑通道,提供给更高层的应用协议使用; 
 各种高层应用协议可以相对地独立于SSH基本体系之外,并依靠这个基本框架,通过连接协议使用SSH的安全机制。
 
 (三)sftp 协议 
  使用SSH协议进行FTP传输的协议叫SFTP(安全文件传输)Sftp和Ftp都是文件传输协议。区别:sftp是ssh内含的协议(ssh是加密的telnet协议),
	只要sshd服务器启动了,它就可用,而且sftp安全性较高,它本身不需要ftp服务器启动。 sftp = ssh + ftp(安全文件传输协议)。由于ftp是明文传输的,
	没有安全性,而sftp基于ssh,传输内容是加密过的,较为安全。目前网络不太安全,以前用telnet的都改用ssh2(SSH1已被破解)。sftp这个工具和ftp用
	法一样。但是它的传输文件是通过ssl加密了的,即使被截获了也无法破解。而且sftp相比ftp功能要多一些,多了一些文件属性的设置

	
	*/
	


		
// 注意这里只是为了介绍ftp ,并没有做验证 ; 		
class ftp{
	
	// 初始配置为NULL
	private $config =NULL ;
	// 连接为NULL 
	private $conn = NULL;
	
	public function init($config){
	 $this->config = $config; 	
	}
	
	// ftp 连接 
	public function connect(){
		return $this->conn = ftp_connect($this->config['host'],$this->config['port'])); 
	}
	
	
	// 传输数据 传输层协议,获得数据 true or false 
  public function download($remote, $local,$mode = 'auto'){
	  return $result = @ftp_get($this->conn, $localpath, $remotepath, $mode);
  }
  
  // 传输数据 传输层协议,上传数据 true or false 
  public function upload($remote, $local,$mode = 'auto'){
	  return $result = @ftp_put($this->conn, $localpath, $remotepath, $mode);
  }
  
  
 	 // 删除文件 
	public function remove($remote){
	 return $result = @ftp_delete($this->conn_id, $file);
	}
  
	
}		



// 使用 
$config = array(
			'hostname' => 'localhost',
      'username' => 'root',
      'password' => 'root',
      'port' => 21

) ;
 
$ftp = new Ftp();
$ftp->connect($config);
$ftp->upload('ftp_err.log','ftp_upload.log');
$ftp->download('ftp_upload.log','ftp_download.log');



/*根据上面的三个协议写出基于ssh 的ftp 类
我们知道进行身份认证的方式有两种:公钥;密码 ;
(1) 使用密码登陆
(2) 免密码登陆也就是使用公钥登陆 

*/

class sftp{
	
	
	// 初始配置为NULL
	private $config =NULL ;
	// 连接为NULL 
	private $conn = NULL;

	
	// 是否使用秘钥登陆 
	 private $use_pubkey_file= false;
	
	// 初始化
	public function init($config){
		$this->config = $config ; 
	}
	
	
	// 连接ssh ,连接有两种方式(1) 使用密码
	// (2) 使用秘钥 
	public function connect(){
		
		$methods['hostkey'] = $use_pubkey_file &#63; 'ssh-rsa' : [] ; 
		$con = ssh2_connect($this->config['host'], $this->config['port'], $methods);
		//(1) 使用秘钥的时候 
		if($use_pubkey_file){
		// 用户认证协议
			 $rc = ssh2_auth_pubkey_file(
				$conn,
				$this->config['user'],
				$this->config['pubkey_file'],
				$this->config['privkey_file'],
				$this->config['passphrase']) 
			);
		//(2) 使用登陆用户名字和登陆密码
		}else{
			$rc = ssh2_auth_password( $conn, $this->conf_['user'],$this->conf_['passwd']);
      
		}
		
		return $rc ; 
	}
	
	
	// 传输数据 传输层协议,获得数据
	  public function download($remote, $local){
		  
		  return ssh2_scp_recv($this->conn_, $remote, $local);
	  }
	  
	 //传输数据 传输层协议,写入ftp服务器数据
	 public function upload($remote, $local,$file_mode=0664){
		  return ssh2_scp_send($this->conn_, $local, $remote, $file_mode);
		  
	 }
	 
	 // 删除文件 
	  public function remove($remote){
			$sftp = ssh2_sftp($this->conn_);
			$rc  = false;

    if (is_dir("ssh2.sftp://{$sftp}/{$remote}")) {
			$rc = false ;
			
			// ssh 删除文件夹
      $rc = ssh2_sftp_rmdir($sftp, $remote);
			} else {
		  // 删除文件
				$rc = ssh2_sftp_unlink($sftp, $remote);
			}
			return $rc;
			
		}
		 
 
 
	
}


$config = [
  "host"     => "192.168.1.1 ",   // ftp地址
  "user"     => "***", 
  "port"     => "22",
  "pubkey_path" => "/root/.ssh/id_rsa.pub",  // 公钥的存储地址
  "privkey_path" => "/root/.ssh/id_rsa",     // 私钥的存储地址
];

$handle = new SftpAccess();
$handle->init($config);
$rc = $handle->connect();
$handle->getData(remote, $local);
		

		
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