PHP-通过socks5代理从私钥连接到sftp

Question

我正试图通过代理使用rsa私钥auth连接到sftp。

use phpseclibNetSFTP;
use phpseclibCryptRSA;
$proxyHost = 'proxy-host';
$proxyPort = 1080;
$fsock = fsockopen($proxyHost, $proxyPort);
$host = 'sftp.hostname.com';
$login = 'sftp_login';
$privatekey = file_get_contents('sftp_private.ppk');
$password = new RSA();
$password->loadKey($privatekey);
$request = "CONNECT $host:22 HTTP/1.0rnContent-Length: 0rnrn";
if(fputs($fsock, $request) != strlen($request)) {
exit("premature termination");
}
while ($line = fgets($fsock, 1024)) {
if ($line == "rn") {
break;
}
//echo $line;
}
$sftp = new SFTP($fsock);
if (!$sftp->login($login, $password)) {
exit('Login Failed');
}

我得到"登录失败"退出。

感谢

Answer 1

报价https://github.com/phpseclib/phpseclib/issues/1460：

端口1080通常用于SOCKS5代理，而不是HTTP代理。

假设你使用的是SOCKS5代理，那么应该是这样的工作：

// SSH connection info
$port = 22;
$address = 'localhost';
// SOCKS5 connection info
$fsock = fsockopen('127.0.0.1', 1080, $errno, $errstr, 1);
if (!$fsock) {
throw new Exception($errstr);
}
$port = pack('n', $port);
$address = chr(strlen($address)) . $address;
$request = "51";
if (fwrite($fsock, $request) != strlen($request)) {
throw new Exception('Premature termination');
}
$response = fread($fsock, 2);
if ($response != "5") {
throw new Exception('Unsupported protocol or unsupported method');
}
$request = "513$address$port";
if (fwrite($fsock, $request) != strlen($request)) {
throw new Exception('Premature termination');
}
$response = fread($fsock, strlen($address) + 6);
if (substr($response, 0, 2) != "5") {
echo bin2hex($response) . "n";
throw new Exception("Unsupported protocol or connection refused");
}
$ssh = new SSH2($fsock);
$ssh->login('username', 'password');
echo $ssh->exec('ls -latr');

也就是说，SOCKS5比这个样本有更多的铃铛和口哨代码当前可容纳。真的，最好是一个完整的SOCKS5级。

希望它能帮助其他人。