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add option to allow arbitrary length packets, for servers like OpenText which sends extremely long directory listings

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This commit is contained in:
Nick Lassonde 2021-08-23 13:17:36 -07:00 committed by terrafrost
parent 0ec9d2bdf1
commit 20500123e5
1 changed files with 26 additions and 1 deletions
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27
phpseclib/Net/SFTP.php
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@ -310,6 +310,21 @@ class Net_SFTP extends Net_SSH2
*/
var $preserveTime = false;
/**
* Arbitrary Length Packets Flag
*
* Determines whether or not packets of any length should be allowed,
* in cases where the server chooses the packet length (such as
* directory listings). By default, packets are only allowed to be
* 256 * 1024 bytes (SFTP_MAX_MSG_LENGTH from OpenSSH's sftp-common.h)
*
* @see self::enableArbitraryLengthPackets()
* @see self::_get_sftp_packet()
* @var bool
* @access private
*/
var $allow_arbitrary_length_packets = false;
/**
* Was the last packet due to the channels being closed or not?
*
@ -703,6 +718,16 @@ class Net_SFTP extends Net_SSH2
$this->canonicalize_paths = true;
}
/**
* Enable arbitrary length packets
*
* @access public
*/
function enableArbitraryLengthPackets()
{
$this->allow_arbitrary_length_packets = true;
}
/**
* Enable path canonicalization
*
@ -3187,7 +3212,7 @@ class Net_SFTP extends Net_SSH2
// 256 * 1024 is what SFTP_MAX_MSG_LENGTH is set to in OpenSSH's sftp-common.h
if (!$this->use_request_id && $tempLength > 256 * 1024) {
if (!$this->allow_arbitrary_length_packets &&!$this->use_request_id && $tempLength > 256 * 1024) {
user_error('Invalid SFTP packet size');
return false;
}