php实现的ssh api类

php实现的ssh api类，主要用来通过ssh传输文件

class SshApi extends BaseObject{
   public $session = null;
   public $authenticated = false;
    
   public function __construct(){
 
   }
    
   public function connect($host){
      $this->session = ssh2_connect($host);
      return $this->session;
   }
    
   public function pubkeyFile($sshUser, $sshPub, $sshPriv, $sshPass){
      if ( ! $this->session ) return false;
      if ( empty($sshPass) ){
         $b = ssh2_auth_pubkey_file( $this->session, $sshUser, $sshPub, $sshPriv);
      }
      else
         $b = ssh2_auth_pubkey_file( $this->session, $sshUser, $sshPub, $sshPriv, $sshPass);
      if ( $b ) $this->authenticated = true;
      return $b;
   }
    
   public function send($localfile, $remotefile, $perms=0660){
      $this->debug(__METHOD__);
      if ( ! $this->session ) return false;
      $this->debug('Sending '. $localfile . ' to ' . $remotefile);
      $b = ssh2_scp_send($this->session, $localfile, $remotefile, $perms);      
      return $b;
   }
    
   public function recv($remotefile , $localfile){
      if ( ! $this->session ) return false;
      $b = ssh2_scp_recv($this->session , $remotefile , $localfile );
      return $b;
   }
    
   public function exec($command){
      if ( ! $this->session ) return false;   
      $stream = ssh2_exec($this->session, $command);
      return $stream;
   }
}