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update chown and chgrp to wor with sftpv4+

This commit is contained in:
terrafrost 2021-08-26 18:26:57 -05:00
parent 1f1e2794c7
commit dbfc762257
1 changed files with 41 additions and 12 deletions
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53
phpseclib/Net/SFTP.php
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@ -1629,22 +1629,47 @@ class Net_SFTP extends Net_SSH2
/**
* Changes file or directory owner
*
* $uid should be an int for SFTPv3 and a string for SFTPv4+. Ideally the string
* would be of the form "user@dns_domain" but it does not need to be.
* `$sftp->getSupportedVersions()['version']` will return the specific version
* that's being used.
*
* Returns true on success or false on error.
*
* @param string $filename
* @param int $uid
* @param int|string $uid
* @param bool $recursive
* @return bool
* @access public
*/
function chown($filename, $uid, $recursive = false)
{
// from v3 to v4 they made this a string
//"Made file attribute owner and group strings so they can actually be used on disparate systems."
//zzzzzzzzz
// quoting from <http://www.kernel.org/doc/man-pages/online/pages/man2/chown.2.html>,
// "if the owner or group is specified as -1, then that ID is not changed"
$attr = pack('N3', NET_SFTP_ATTR_UIDGID, $uid, -1);
/*
quoting <https://datatracker.ietf.org/doc/html/draft-ietf-secsh-filexfer-13#section-7.5>,
"To avoid a representation that is tied to a particular underlying
implementation at the client or server, the use of UTF-8 strings has
been chosen. The string should be of the form "user@dns_domain".
This will allow for a client and server that do not use the same
local representation the ability to translate to a common syntax that
can be interpreted by both. In the case where there is no
translation available to the client or server, the attribute value
must be constructed without the "@"."
phpseclib _could_ auto append the dns_domain to $uid BUT what if it shouldn't
have one? phpseclib would have no way of knowing so rather than guess phpseclib
will just use whatever value the user provided
*/
$attr = $this->version >= 4 ?
// quoting <http://www.kernel.org/doc/man-pages/online/pages/man2/chown.2.html>,
// "if the owner or group is specified as -1, then that ID is not changed"
pack('N3', NET_SFTP_ATTR_UIDGID, $uid, -1) :
// quoting <https://datatracker.ietf.org/doc/html/draft-ietf-secsh-filexfer-13#section-7.5>,
// "If either the owner or group field is zero length, the field should be
// considered absent, and no change should be made to that specific field
// during a modification operation"
pack('NNa*Na*', NET_SFTP_ATTR_OWNERGROUP, strlen($uid), $uid, 0, '');
return $this->_setstat($filename, $attr, $recursive);
}
@ -1652,20 +1677,24 @@ class Net_SFTP extends Net_SSH2
/**
* Changes file or directory group
*
* $gid should be an int for SFTPv3 and a string for SFTPv4+. Ideally the string
* would be of the form "user@dns_domain" but it does not need to be.
* `$sftp->getSupportedVersions()['version']` will return the specific version
* that's being used.
*
* Returns true on success or false on error.
*
* @param string $filename
* @param int $gid
* @param int|string $gid
* @param bool $recursive
* @return bool
* @access public
*/
function chgrp($filename, $gid, $recursive = false)
{
// from v3 to v4 they made this a string
//"Made file attribute owner and group strings so they can actually be used on disparate systems."
//zzzzzzzzz
$attr = pack('N3', NET_SFTP_ATTR_UIDGID, -1, $gid);
$attr = $this->version >= 4 ?
pack('N3', NET_SFTP_ATTR_UIDGID, $gid, -1) :
pack('NNa*Na*', NET_SFTP_ATTR_OWNERGROUP, 0, '', strlen($gid), $gid);
return $this->_setstat($filename, $attr, $recursive);
}