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add attribute reading for sftpv4

This commit is contained in:
terrafrost 2021-07-31 15:38:21 -05:00
parent 4cb6bcb75e
commit 092bad12c5
1 changed files with 66 additions and 11 deletions
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77
phpseclib/Net/SFTP.php
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@ -382,9 +382,6 @@ class Net_SFTP extends Net_SSH2
101=> 'NET_SFTP_STATUS',
102=> 'NET_SFTP_HANDLE',
/* the format of SSH_FXP_NAME changed between SFTPv3 and SFTPv4+:
SFTPv4+: http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13#section-9.4
pre-SFTPv4 : http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-7 */
103=> 'NET_SFTP_DATA',
104=> 'NET_SFTP_NAME',
105=> 'NET_SFTP_ATTRS',
@ -430,12 +427,12 @@ class Net_SFTP extends Net_SSH2
$this->attributes = array(
0x00000001 => 'NET_SFTP_ATTR_SIZE',
0x00000002 => 'NET_SFTP_ATTR_UIDGID', // defined in SFTPv3, removed in SFTPv4+
0x00000080 => 'NET_SFTP_ATTR_OWNERGROUP', // defined in SFTPv4+
0x00000004 => 'NET_SFTP_ATTR_PERMISSIONS',
0x00000008 => 'NET_SFTP_ATTR_ACCESSTIME',
0x00000010 => 'NET_SFTP_ATTR_CREATETIME', // SFTPv4+
0x00000020 => 'NET_SFTP_ATTR_MODIFYTIME',
0x00000040 => 'NET_SFTP_ATTR_ACL',
0x00000080 => 'NET_SFTP_ATTR_OWNERGROUP',
0x00000100 => 'NET_SFTP_ATTR_SUBSECOND_TIMES',
0x00000200 => 'NET_SFTP_ATTR_BITS', // SFTPv5+
0x00000400 => 'NET_SFTP_ATTR_ALLOCATION_SIZE', // SFTPv6+
@ -1130,9 +1127,10 @@ class Net_SFTP extends Net_SSH2
}
extract(unpack('Nlength', $this->_string_shift($response, 4)));
$shortname = $this->_string_shift($response, $length);
echo "================= $shortname\n";
// SFTPv4 "removed the long filename from the names structure-- it can now be
// built from information available in the attrs structure."
if ($this->version == 3) {
if ($this->version < 4) {
if (strlen($response) < 4) {
return false;
}
@ -1140,7 +1138,8 @@ class Net_SFTP extends Net_SSH2
$longname = $this->_string_shift($response, $length);
}
$attributes = $this->_parseAttributes($response);
if (!isset($attributes['type']) && $this->version == 3) {
var_dump($attributes);// exit;
if (!isset($attributes['type']) && $this->version < 4) {
$fileType = $this->_parseLongname($longname);
if ($fileType) {
$attributes['type'] = $fileType;
@ -3042,7 +3041,7 @@ SFTP v6 changes (from v5)
return array();
}
$attr = array();
$attr[$key] = hexdec(bin2hex($this->_string_shift($response, 4)));
$attr[$key] = hexdec(bin2hex($this->_string_shift($response, 8)));
if ($flags & NET_SFTP_ATTR_SUBSECOND_TIMES) {
$attr+= extract(unpack('N' . $key . '_nseconds', $this->_string_shift($response, 4)));
}
@ -3060,16 +3059,27 @@ SFTP v6 changes (from v5)
*/
function _parseAttributes(&$response)
{
if ($this->version >= 4) {
$length = 5;
$format = 'Nflags/Ctype';
} else {
$length = 4;
$format = 'Nflags';
}
$attr = array();
if (strlen($response) < 4) {
if (strlen($response) < $length) {
user_error('Malformed file attributes');
return array();
}
extract(unpack('Nflags', $this->_string_shift($response, 4)));
// SFTPv4+ have a type field (a byte) that follows the above flag field
extract(unpack($format, $this->_string_shift($response, $length)));
if (isset($type)) {
$attr['type'] = $type;
}
foreach ($this->attributes as $key => $value) {
switch ($flags & $key) {
case NET_SFTP_ATTR_SIZE: // 0x00000001
echo "size\n";
// The size attribute is defined as an unsigned 64-bit integer.
// The following will use floats on 32-bit platforms, if necessary.
// As can be seen in the BigInteger class, floats are generally
@ -3078,7 +3088,8 @@ SFTP v6 changes (from v5)
// of precision. Interpreted in filesize, 2^50 bytes = 1024 TiB.
$attr['size'] = hexdec(bin2hex($this->_string_shift($response, 8)));
break;
case NET_SFTP_ATTR_UIDGID: // 0x00000002 (SFTPv3 only)
case NET_SFTP_ATTR_UIDGID: // 0x00000002 (SFTPv3 or earlier)
echo "uidgid\n";
if (strlen($response) < 8) {
user_error('Malformed file attributes');
return $attr;
@ -3086,6 +3097,7 @@ SFTP v6 changes (from v5)
$attr+= unpack('Nuid/Ngid', $this->_string_shift($response, 8));
break;
case NET_SFTP_ATTR_PERMISSIONS: // 0x00000004
echo "perms\n";
if (strlen($response) < 4) {
user_error('Malformed file attributes');
return $attr;
@ -3100,6 +3112,7 @@ SFTP v6 changes (from v5)
}
break;
case NET_SFTP_ATTR_ACCESSTIME: // 0x00000008
echo "accesstime\n";
if ($this->version >= 4) {
$attr+= $this->_parseTime('atime', $flags, $response);
break;
@ -3111,16 +3124,58 @@ SFTP v6 changes (from v5)
$attr+= unpack('Natime/Nmtime', $this->_string_shift($response, 8));
break;
case NET_SFTP_ATTR_CREATETIME: // 0x00000010 (SFTPv4+)
echo "createtime\n";
$attr+= $this->_parseTime('createtime', $flags, $response);
break;
case NET_SFTP_ATTR_MODIFYTIME: // 0x00000020
echo "modifytime\n";
$attr+= $this->_parseTime('mtime', $flags, $response);
break;
case NET_SFTP_ATTR_ACL: // 0x00000040
echo "acl\n";
// see https://datatracker.ietf.org/doc/html/draft-ietf-secsh-filexfer-04#section-5.7
// currently unsupported
if (strlen($response) < 4) {
user_error('Malformed file attributes');
return $attr;
}
extract(unpack('Ncount', $this->_string_shift($response, 4)));
for ($i = 0; $i < $count; $i++) {
if (strlen($response) < 16) {
user_error('Malformed file attributes');
return $attr;
}
extract(unpack('Ntype/Nflag/Nmask/Nlength', $this->_string_shift($response, 16)));
if (strlen($response) < $length) {
user_error('Malformed file attributes');
return $attr;
}
$this->_string_shift($response, $length); // who
}
break;
case NET_SFTP_ATTR_OWNERGROUP: // 0x00000080
echo "ownergroup\n";
if (strlen($response) < 4) {
user_error('Malformed file attributes');
return $attr;
}
extract(unpack('Nlength', $this->_string_shift($response, 4)));
if (strlen($response) < $length) {
user_error('Malformed file attributes');
return $attr;
}
$attr['owner'] = $this->_string_shift($response, $length);
if (strlen($response) < 4) {
user_error('Malformed file attributes');
return $attr;
}
extract(unpack('Nlength', $this->_string_shift($response, 4)));
if (strlen($response) < $length) {
user_error('Malformed file attributes');
return $attr;
}
$attr['group'] = $this->_string_shift($response, $length);
break;
case NET_SFTP_ATTR_SUBSECOND_TIMES: // 0x00000100
break;