<?php
/**
* SFTP Stream Wrapper
*
* Creates an sftp:// protocol handler that can be used with, for example, fopen(), dir(), etc.
*
* PHP version 5
*
* @author Jim Wigginton <terrafrost@php.net>
* @copyright 2013 Jim Wigginton
* @license http://www.opensource.org/licenses/mit-license.html MIT License
* @link http://phpseclib.sourceforge.net
*/
namespace phpseclib3\Net\SFTP;
use phpseclib3\Crypt\Common\PrivateKey;
use phpseclib3\Net\SFTP;
use phpseclib3\Net\SSH2;
/**
* SFTP Stream Wrapper
*
* @author Jim Wigginton <terrafrost@php.net>
*/
class Stream
{
/**
* SFTP instances
*
* Rather than re-create the connection we re-use instances if possible
*
* @var array
*/
public static $instances;
/**
* SFTP instance
*
* @var object
*/
private $sftp;
/**
* Path
*
* @var string
*/
private $path;
/**
* Mode
*
* @var string
*/
private $mode;
/**
* Position
*
* @var int
*/
private $pos;
/**
* Size
*
* @var int
*/
private $size;
/**
* Directory entries
*
* @var array
*/
private $entries;
/**
* EOF flag
*
* @var bool
*/
private $eof;
/**
* Context resource
*
* Technically this needs to be publicly accessible so PHP can set it directly
*
* @var resource
*/
public $context;
/**
* Notification callback function
*
* @var callable
*/
private $notification;
/**
* Registers this class as a URL wrapper.
*
* @param string $protocol The wrapper name to be registered.
* @return bool True on success, false otherwise.
*/
public static function register($protocol = 'sftp')
{
if (in_array($protocol, stream_get_wrappers(), true)) {
return false;
}
return stream_wrapper_register($protocol, get_called_class());
}
/**
* The Constructor
*
*/
public function __construct()
{
if (defined('NET_SFTP_STREAM_LOGGING')) {
echo "__construct()\r\n";
}
}
/**
* Path Parser
*
* Extract a path from a URI and actually connect to an SSH server if appropriate
*
* If "notification" is set as a context parameter the message code for successful login is
* NET_SSH2_MSG_USERAUTH_SUCCESS. For a failed login it's NET_SSH2_MSG_USERAUTH_FAILURE.
*
* @param string $path
* @return string
*/
protected function parse_path($path)
{
$orig = $path;
extract(parse_url($path) + ['port' => 22]);
if (isset($query)) {
$path .= '?' . $query;
} elseif (preg_match('/(\?|\?#)$/', $orig)) {
$path .= '?';
}
if (isset($fragment)) {
$path .= '#' . $fragment;
} elseif ($orig[strlen($orig) - 1] == '#') {
$path .= '#';
}
if (!isset($host)) {
return false;
}
if (isset($this->context)) {
$context = stream_context_get_params($this->context);
if (isset($context['notification'])) {
$this->notification = $context['notification'];
}
}
if (preg_match('/^{[a-z0-9]+}$/i', $host)) {
$host = SSH2::getConnectionByResourceId($host);
if ($host === false) {
return false;
}
$this->sftp = $host;
} else {
if (isset($this->context)) {
$context = stream_context_get_options($this->context);
}
if (isset($context[$scheme]['session'])) {
$sftp = $context[$scheme]['session'];
}
if (isset($context[$scheme]['sftp'])) {
$sftp = $context[$scheme]['sftp'];
}
if (isset($sftp) && $sftp instanceof SFTP) {
$this->sftp = $sftp;
return $path;
}
if (isset($context[$scheme]['username'])) {
$user = $context[$scheme]['username'];
}
if (isset($context[$scheme]['password'])) {
$pass = $context[$scheme]['password'];
}
if (isset($context[$scheme]['privkey']) && $context[$scheme]['privkey'] instanceof PrivateKey) {
$pass = $context[$scheme]['privkey'];
}
if (!isset($user) || !isset($pass)) {
return false;
}
// casting $pass to a string is necessary in the event that it's a \phpseclib3\Crypt\RSA object
if (isset(self::$instances[$host][$port][$user][(string) $pass])) {
$this->sftp = self::$instances[$host][$port][$user][(string) $pass];
} else {
$this->sftp = new SFTP($host, $port);
$this->sftp->disableStatCache();
if (isset($this->notification) && is_callable($this->notification)) {
/* if !is_callable($this->notification) we could do this:
user_error('fopen(): failed to call user notifier', E_USER_WARNING);
the ftp wrapper gives errors like that when the notifier isn't callable.
i've opted not to do that, however, since the ftp wrapper gives the line
on which the fopen occurred as the line number - not the line that the
user_error is on.
*/
call_user_func($this->notification, STREAM_NOTIFY_CONNECT, STREAM_NOTIFY_SEVERITY_INFO, '', 0, 0, 0);
call_user_func($this->notification, STREAM_NOTIFY_AUTH_REQUIRED, STREAM_NOTIFY_SEVERITY_INFO, '', 0, 0, 0);
if (!$this->sftp->login($user, $pass)) {
call_user_func($this->notification, STREAM_NOTIFY_AUTH_RESULT, STREAM_NOTIFY_SEVERITY_ERR, 'Login Failure', NET_SSH2_MSG_USERAUTH_FAILURE, 0, 0);
return false;
}
call_user_func($this->notification, STREAM_NOTIFY_AUTH_RESULT, STREAM_NOTIFY_SEVERITY_INFO, 'Login Success', NET_SSH2_MSG_USERAUTH_SUCCESS, 0, 0);
} else {
if (!$this->sftp->login($user, $pass)) {
return false;
}
}
self::$instances[$host][$port][$user][(string) $pass] = $this->sftp;
}
}
return $path;
}
/**
* Opens file or URL
*
* @param string $path
* @param string $mode
* @param int $options
* @param string $opened_path
* @return bool
*/
private function _stream_open($path, $mode, $options, &$opened_path)
{
$path = $this->parse_path($path);
if ($path === false) {
return false;
}
$this->path = $path;
$this->size = $this->sftp->filesize($path);
$this->mode = preg_replace('#[bt]$#', '', $mode);
$this->eof = false;
if ($this->size === false) {
if ($this->mode[0] == 'r') {
return false;
} else {
$this->sftp->touch($path);
$this->size = 0;
}
} else {
switch ($this->mode[0]) {
case 'x':
return false;
case 'w':
$this->sftp->truncate($path, 0);
$this->size = 0;
}
}
$this->pos = $this->mode[0] != 'a' ? 0 : $this->size;
return true;
}
/**
* Read from stream
*
* @param int $count
* @return mixed
*/
private function _stream_read($count)
{
switch ($this->mode) {
case 'w':
case 'a':
case 'x':
case 'c':
return false;
}
// commented out because some files - eg. /dev/urandom - will say their size is 0 when in fact it's kinda infinite
//if ($this->pos >= $this->size) {
// $this->eof = true;
// return false;
//}
$result = $this->sftp->get($this->path, false, $this->pos, $count);
if (isset($this->notification) && is_callable($this->notification)) {
if ($result === false) {
call_user_func($this->notification, STREAM_NOTIFY_FAILURE, STREAM_NOTIFY_SEVERITY_ERR, $this->sftp->getLastSFTPError(), NET_SFTP_OPEN, 0, 0);
return 0;
}
// seems that PHP calls stream_read in 8k chunks
call_user_func($this->notification, STREAM_NOTIFY_PROGRESS, STREAM_NOTIFY_SEVERITY_INFO, '', 0, strlen($result), $this->size);
}
if (empty($result)) { // ie. false or empty string
$this->eof = true;
return false;
}
$this->pos += strlen($result);
return $result;
}
/**
* Write to stream
*
* @param string $data
* @return int|false
*/
private function _stream_write($data)
{
switch ($this->mode) {
case 'r':
return false;
}
$result = $this->sftp->put($this->path, $data, SFTP::SOURCE_STRING, $this->pos);
if (isset($this->notification) && is_callable($this->notification)) {
if (!$result) {
call_user_func($this->notification, STREAM_NOTIFY_FAILURE, STREAM_NOTIFY_SEVERITY_ERR, $this->sftp->getLastSFTPError(), NET_SFTP_OPEN, 0, 0);
return 0;
}
// seems that PHP splits up strings into 8k blocks before calling stream_write
call_user_func($this->notification, STREAM_NOTIFY_PROGRESS, STREAM_NOTIFY_SEVERITY_INFO, '', 0, strlen($data), strlen($data));
}
if ($result === false) {
return false;
}
$this->pos += strlen($data);
if ($this->pos > $this->size) {
$this->size = $this->pos;
}
$this->eof = false;
return strlen($data);
}
/**
* Retrieve the current position of a stream
*
* @return int
*/
private function _stream_tell()
{
return $this->pos;
}
/**
* Tests for end-of-file on a file pointer
*
* In my testing there are four classes functions that normally effect the pointer:
* fseek, fputs / fwrite, fgets / fread and ftruncate.
*
* Only fgets / fread, however, results in feof() returning true. do fputs($fp, 'aaa') on a blank file and feof()
* will return false. do fread($fp, 1) and feof() will then return true. do fseek($fp, 10) on ablank file and feof()
* will return false. do fread($fp, 1) and feof() will then return true.
*
* @return bool
*/
private function _stream_eof()
{
return $this->eof;
}
/**
* Seeks to specific location in a stream
*
* @param int $offset
* @param int $whence
* @return bool
*/
private function _stream_seek($offset, $whence)
{
switch ($whence) {
case SEEK_SET:
if ($offset < 0) {
return false;
}
break;
case SEEK_CUR:
$offset += $this->pos;
break;
case SEEK_END:
$offset += $this->size;
}
$this->pos = $offset;
$this->eof = false;
return true;
}
/**
* Change stream options
*
* @param string $path
* @param int $option
* @param mixed $var
* @return bool
*/
private function _stream_metadata($path, $option, $var)
{
$path = $this->parse_path($path);
if ($path === false) {
return false;
}
// stream_metadata was introduced in PHP 5.4.0 but as of 5.4.11 the constants haven't been defined
// see http://www.php.net/streamwrapper.stream-metadata and https://bugs.php.net/64246
// and https://github.com/php/php-src/blob/master/main/php_streams.h#L592
switch ($option) {
case 1: // PHP_STREAM_META_TOUCH
$time = isset($var[0]) ? $var[0] : null;
$atime = isset($var[1]) ? $var[1] : null;
return $this->sftp->touch($path, $time, $atime);
case 2: // PHP_STREAM_OWNER_NAME
case 3: // PHP_STREAM_GROUP_NAME
return false;
case 4: // PHP_STREAM_META_OWNER
return $this->sftp->chown($path, $var);
case 5: // PHP_STREAM_META_GROUP
return $this->sftp->chgrp($path, $var);
case 6: // PHP_STREAM_META_ACCESS
return $this->sftp->chmod($path, $var) !== false;
}
}
/**
* Retrieve the underlaying resource
*
* @param int $cast_as
* @return resource
*/
private function _stream_cast($cast_as)
{
return $this->sftp->fsock;
}
/**
* Advisory file locking
*
* @param int $operation
* @return bool
*/
private function _stream_lock($operation)
{
return false;
}
/**
* Renames a file or directory
*
* Attempts to rename oldname to newname, moving it between directories if necessary.
* If newname exists, it will be overwritten. This is a departure from what \phpseclib3\Net\SFTP
* does.
*
* @param string $path_from
* @param string $path_to
* @return bool
*/
private function _rename($path_from, $path_to)
{
$path1 = parse_url($path_from);
$path2 = parse_url($path_to);
unset($path1['path'], $path2['path']);
if ($path1 != $path2) {
return false;
}
$path_from = $this->parse_path($path_from);
$path_to = parse_url($path_to);
if ($path_from === false) {
return false;
}
$path_to = $path_to['path']; // the $component part of parse_url() was added in PHP 5.1.2
// "It is an error if there already exists a file with the name specified by newpath."
// -- http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-6.5
if (!$this->sftp->rename($path_from, $path_to)) {
if ($this->sftp->stat($path_to)) {
return $this->sftp->delete($path_to, true) && $this->sftp->rename($path_from, $path_to);
}
return false;
}
return true;
}
/**
* Open directory handle
*
* The only $options is "whether or not to enforce safe_mode (0x04)". Since safe mode was deprecated in 5.3 and
* removed in 5.4 I'm just going to ignore it.
*
* Also, nlist() is the best that this function is realistically going to be able to do. When an SFTP client
* sends a SSH_FXP_READDIR packet you don't generally get info on just one file but on multiple files. Quoting
* the SFTP specs:
*
* The SSH_FXP_NAME response has the following format:
*
* uint32 id
* uint32 count
* repeats count times:
* string filename
* string longname
* ATTRS attrs
*
* @param string $path
* @param int $options
* @return bool
*/
private function _dir_opendir($path, $options)
{
$path = $this->parse_path($path);
if ($path === false) {
return false;
}
$this->pos = 0;
$this->entries = $this->sftp->nlist($path);
return $this->entries !== false;
}
/**
* Read entry from directory handle
*
* @return mixed
*/
private function _dir_readdir()
{
if (isset($this->entries[$this->pos])) {
return $this->entries[$this->pos++];
}
return false;
}
/**
* Rewind directory handle
*
* @return bool
*/
private function _dir_rewinddir()
{
$this->pos = 0;
return true;
}
/**
* Close directory handle
*
* @return bool
*/
private function _dir_closedir()
{
return true;
}
/**
* Create a directory
*
* Only valid $options is STREAM_MKDIR_RECURSIVE
*
* @param string $path
* @param int $mode
* @param int $options
* @return bool
*/
private function _mkdir($path, $mode, $options)
{
$path = $this->parse_path($path);
if ($path === false) {
return false;
}
return $this->sftp->mkdir($path, $mode, $options & STREAM_MKDIR_RECURSIVE);
}
/**
* Removes a directory
*
* Only valid $options is STREAM_MKDIR_RECURSIVE per <http://php.net/streamwrapper.rmdir>, however,
* <http://php.net/rmdir> does not have a $recursive parameter as mkdir() does so I don't know how
* STREAM_MKDIR_RECURSIVE is supposed to be set. Also, when I try it out with rmdir() I get 8 as
* $options. What does 8 correspond to?
*
* @param string $path
* @param int $options
* @return bool
*/
private function _rmdir($path, $options)
{
$path = $this->parse_path($path);
if ($path === false) {
return false;
}
return $this->sftp->rmdir($path);
}
/**
* Flushes the output
*
* See <http://php.net/fflush>. Always returns true because \phpseclib3\Net\SFTP doesn't cache stuff before writing
*
* @return bool
*/
private function _stream_flush()
{
return true;
}
/**
* Retrieve information about a file resource
*
* @return mixed
*/
private function _stream_stat()
{
$results = $this->sftp->stat($this->path);
if ($results === false) {
return false;
}
return $results;
}
/**
* Delete a file
*
* @param string $path
* @return bool
*/
private function _unlink($path)
{
$path = $this->parse_path($path);
if ($path === false) {
return false;
}
return $this->sftp->delete($path, false);
}
/**
* Retrieve information about a file
*
* Ignores the STREAM_URL_STAT_QUIET flag because the entirety of \phpseclib3\Net\SFTP\Stream is quiet by default
* might be worthwhile to reconstruct bits 12-16 (ie. the file type) if mode doesn't have them but we'll
* cross that bridge when and if it's reached
*
* @param string $path
* @param int $flags
* @return mixed
*/
private function _url_stat($path, $flags)
{
$path = $this->parse_path($path);
if ($path === false) {
return false;
}
$results = $flags & STREAM_URL_STAT_LINK ? $this->sftp->lstat($path) : $this->sftp->stat($path);
if ($results === false) {
return false;
}
return $results;
}
/**
* Truncate stream
*
* @param int $new_size
* @return bool
*/
private function _stream_truncate($new_size)
{
if (!$this->sftp->truncate($this->path, $new_size)) {
return false;
}
$this->eof = false;
$this->size = $new_size;
return true;
}
/**
* Change stream options
*
* STREAM_OPTION_WRITE_BUFFER isn't supported for the same reason stream_flush isn't.
* The other two aren't supported because of limitations in \phpseclib3\Net\SFTP.
*
* @param int $option
* @param int $arg1
* @param int $arg2
* @return bool
*/
private function _stream_set_option($option, $arg1, $arg2)
{
return false;
}
/**
* Close an resource
*
*/
private function _stream_close()
{
}
/**
* __call Magic Method
*
* When you're utilizing an SFTP stream you're not calling the methods in this class directly - PHP is calling them for you.
* Which kinda begs the question... what methods is PHP calling and what parameters is it passing to them? This function
* lets you figure that out.
*
* If NET_SFTP_STREAM_LOGGING is defined all calls will be output on the screen and then (regardless of whether or not
* NET_SFTP_STREAM_LOGGING is enabled) the parameters will be passed through to the appropriate method.
*
* @param string $name
* @param array $arguments
* @return mixed
*/
public function __call($name, array $arguments)
{
if (defined('NET_SFTP_STREAM_LOGGING')) {
echo $name . '(';
$last = count($arguments) - 1;
foreach ($arguments as $i => $argument) {
var_export($argument);
if ($i != $last) {
echo ',';
}
}
echo ")\r\n";
}
$name = '_' . $name;
if (!method_exists($this, $name)) {
return false;
}
return $this->$name(...$arguments);
}
}
At NFC Pay, your privacy is of utmost importance to us. This Privacy Policy outlines how we collect, use, share, and protect your personal information when you use our services, including our website and mobile applications.
1. Information We Collect
2. How We Use Your Information
We use the information we collect for the following purposes:
3. Sharing Your Information
We may share your personal information in the following circumstances:
4. Security of Your Information
We take the security of your personal information seriously and implement a variety of security measures, including encryption, secure servers, and access controls, to protect your data from unauthorized access, disclosure, alteration, or destruction. However, no method of transmission over the internet or electronic storage is completely secure, and we cannot guarantee its absolute security.
5. Your Privacy Rights
Depending on your location, you may have certain rights regarding your personal information, such as:
6. Third-Party Links
Our services may contain links to third-party websites or services. We are not responsible for the privacy practices or the content of these third-party sites. We encourage you to review the privacy policies of those third parties.
7. Children’s Privacy
Our services are not intended for individuals under the age of 13. We do not knowingly collect personal information from children under 13. If we become aware that we have collected personal information from a child under 13, we will take steps to delete that information.
8. Changes to This Privacy Policy
We may update this Privacy Policy from time to time to reflect changes in our practices or for other operational, legal, or regulatory reasons. We will notify you of any significant changes by posting the new Privacy Policy on our website and updating the effective date.
9. Contact Us
If you have any questions or concerns about this Privacy Policy or our data practices, please contact us at:
Email: support@nfcpay.com