814 lines
22 KiB
PHP
814 lines
22 KiB
PHP
<?php
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/**
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* WordPress Filesystem Class for implementing SSH2
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*
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* To use this class you must follow these steps for PHP 5.2.6+
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*
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* @contrib http://kevin.vanzonneveld.net/techblog/article/make_ssh_connections_with_php/ - Installation Notes
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*
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* Compile libssh2 (Note: Only 0.14 is officaly working with PHP 5.2.6+ right now, But many users have found the latest versions work)
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*
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* cd /usr/src
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* wget https://www.libssh2.org/download/libssh2-0.14.tar.gz
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* tar -zxvf libssh2-0.14.tar.gz
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* cd libssh2-0.14/
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* ./configure
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* make all install
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*
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* Note: Do not leave the directory yet!
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*
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* Enter: pecl install -f ssh2
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*
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* Copy the ssh.so file it creates to your PHP Module Directory.
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* Open up your PHP.INI file and look for where extensions are placed.
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* Add in your PHP.ini file: extension=ssh2.so
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*
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* Restart Apache!
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* Check phpinfo() streams to confirm that: ssh2.shell, ssh2.exec, ssh2.tunnel, ssh2.scp, ssh2.sftp exist.
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*
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* Note: As of WordPress 2.8, this utilises the PHP5+ function `stream_get_contents()`.
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*
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* @since 2.7.0
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*
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* @package WordPress
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* @subpackage Filesystem
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*/
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class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
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/**
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* @since 2.7.0
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* @var resource
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*/
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public $link = false;
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/**
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* @since 2.7.0
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* @var resource
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*/
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public $sftp_link;
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/**
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* @since 2.7.0
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* @var bool
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*/
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public $keys = false;
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/**
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* Constructor.
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*
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* @since 2.7.0
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*
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* @param array $opt
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*/
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public function __construct( $opt = '' ) {
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$this->method = 'ssh2';
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$this->errors = new WP_Error();
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// Check if possible to use ssh2 functions.
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if ( ! extension_loaded( 'ssh2' ) ) {
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$this->errors->add( 'no_ssh2_ext', __( 'The ssh2 PHP extension is not available' ) );
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return;
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}
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// Set defaults:
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if ( empty( $opt['port'] ) ) {
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$this->options['port'] = 22;
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} else {
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$this->options['port'] = $opt['port'];
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}
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if ( empty( $opt['hostname'] ) ) {
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$this->errors->add( 'empty_hostname', __( 'SSH2 hostname is required' ) );
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} else {
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$this->options['hostname'] = $opt['hostname'];
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}
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// Check if the options provided are OK.
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if ( ! empty( $opt['public_key'] ) && ! empty( $opt['private_key'] ) ) {
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$this->options['public_key'] = $opt['public_key'];
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$this->options['private_key'] = $opt['private_key'];
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$this->options['hostkey'] = array( 'hostkey' => 'ssh-rsa' );
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$this->keys = true;
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} elseif ( empty( $opt['username'] ) ) {
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$this->errors->add( 'empty_username', __( 'SSH2 username is required' ) );
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}
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if ( ! empty( $opt['username'] ) ) {
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$this->options['username'] = $opt['username'];
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}
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if ( empty( $opt['password'] ) ) {
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// Password can be blank if we are using keys.
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if ( ! $this->keys ) {
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$this->errors->add( 'empty_password', __( 'SSH2 password is required' ) );
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}
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} else {
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$this->options['password'] = $opt['password'];
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}
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}
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/**
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* Connects filesystem.
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*
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* @since 2.7.0
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*
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* @return bool True on success, false on failure.
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*/
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public function connect() {
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if ( ! $this->keys ) {
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$this->link = @ssh2_connect( $this->options['hostname'], $this->options['port'] );
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} else {
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$this->link = @ssh2_connect( $this->options['hostname'], $this->options['port'], $this->options['hostkey'] );
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}
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if ( ! $this->link ) {
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$this->errors->add(
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'connect',
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sprintf(
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/* translators: %s: hostname:port */
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__( 'Failed to connect to SSH2 Server %s' ),
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$this->options['hostname'] . ':' . $this->options['port']
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)
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);
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return false;
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}
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if ( ! $this->keys ) {
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if ( ! @ssh2_auth_password( $this->link, $this->options['username'], $this->options['password'] ) ) {
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$this->errors->add(
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'auth',
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sprintf(
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/* translators: %s: Username. */
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__( 'Username/Password incorrect for %s' ),
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$this->options['username']
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)
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);
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return false;
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}
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} else {
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if ( ! @ssh2_auth_pubkey_file( $this->link, $this->options['username'], $this->options['public_key'], $this->options['private_key'], $this->options['password'] ) ) {
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$this->errors->add(
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'auth',
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sprintf(
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/* translators: %s: Username. */
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__( 'Public and Private keys incorrect for %s' ),
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$this->options['username']
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)
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);
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return false;
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}
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}
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$this->sftp_link = ssh2_sftp( $this->link );
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if ( ! $this->sftp_link ) {
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$this->errors->add(
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'connect',
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sprintf(
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/* translators: %s: hostname:port */
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__( 'Failed to initialize a SFTP subsystem session with the SSH2 Server %s' ),
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$this->options['hostname'] . ':' . $this->options['port']
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)
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);
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return false;
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}
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return true;
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}
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/**
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* Gets the ssh2.sftp PHP stream wrapper path to open for the given file.
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*
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* This method also works around a PHP bug where the root directory (/) cannot
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* be opened by PHP functions, causing a false failure. In order to work around
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* this, the path is converted to /./ which is semantically the same as /
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* See https://bugs.php.net/bug.php?id=64169 for more details.
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*
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* @since 4.4.0
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*
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* @param string $path The File/Directory path on the remote server to return
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* @return string The ssh2.sftp:// wrapped path to use.
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*/
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public function sftp_path( $path ) {
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if ( '/' === $path ) {
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$path = '/./';
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}
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return 'ssh2.sftp://' . $this->sftp_link . '/' . ltrim( $path, '/' );
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}
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/**
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* @since 2.7.0
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*
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* @param string $command
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* @param bool $returnbool
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* @return bool|string True on success, false on failure. String if the command was executed, `$returnbool`
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* is false (default), and data from the resulting stream was retrieved.
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*/
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public function run_command( $command, $returnbool = false ) {
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if ( ! $this->link ) {
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return false;
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}
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$stream = ssh2_exec( $this->link, $command );
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if ( ! $stream ) {
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$this->errors->add(
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'command',
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sprintf(
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/* translators: %s: Command. */
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__( 'Unable to perform command: %s' ),
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$command
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)
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);
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} else {
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stream_set_blocking( $stream, true );
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stream_set_timeout( $stream, FS_TIMEOUT );
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$data = stream_get_contents( $stream );
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fclose( $stream );
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if ( $returnbool ) {
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return ( false === $data ) ? false : '' !== trim( $data );
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} else {
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return $data;
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}
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}
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return false;
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}
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/**
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* Reads entire file into a string.
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*
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* @since 2.7.0
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*
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* @param string $file Name of the file to read.
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* @return string|false Read data on success, false if no temporary file could be opened,
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* or if the file couldn't be retrieved.
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*/
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public function get_contents( $file ) {
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return file_get_contents( $this->sftp_path( $file ) );
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}
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/**
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* Reads entire file into an array.
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*
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* @since 2.7.0
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*
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* @param string $file Path to the file.
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* @return array|false File contents in an array on success, false on failure.
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*/
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public function get_contents_array( $file ) {
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return file( $this->sftp_path( $file ) );
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}
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/**
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* Writes a string to a file.
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*
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* @since 2.7.0
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*
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* @param string $file Remote path to the file where to write the data.
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* @param string $contents The data to write.
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* @param int|false $mode Optional. The file permissions as octal number, usually 0644.
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function put_contents( $file, $contents, $mode = false ) {
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$ret = file_put_contents( $this->sftp_path( $file ), $contents );
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if ( strlen( $contents ) !== $ret ) {
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return false;
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}
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$this->chmod( $file, $mode );
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return true;
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}
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/**
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* Gets the current working directory.
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*
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* @since 2.7.0
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*
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* @return string|false The current working directory on success, false on failure.
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*/
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public function cwd() {
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$cwd = ssh2_sftp_realpath( $this->sftp_link, '.' );
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if ( $cwd ) {
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$cwd = trailingslashit( trim( $cwd ) );
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}
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return $cwd;
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}
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/**
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* Changes current directory.
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*
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* @since 2.7.0
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*
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* @param string $dir The new current directory.
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* @return bool True on success, false on failure.
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*/
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public function chdir( $dir ) {
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return $this->run_command( 'cd ' . $dir, true );
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}
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/**
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* Changes the file group.
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*
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* @since 2.7.0
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*
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* @param string $file Path to the file.
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* @param string|int $group A group name or number.
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* @param bool $recursive Optional. If set to true, changes file group recursively.
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function chgrp( $file, $group, $recursive = false ) {
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if ( ! $this->exists( $file ) ) {
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return false;
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}
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if ( ! $recursive || ! $this->is_dir( $file ) ) {
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return $this->run_command( sprintf( 'chgrp %s %s', escapeshellarg( $group ), escapeshellarg( $file ) ), true );
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}
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return $this->run_command( sprintf( 'chgrp -R %s %s', escapeshellarg( $group ), escapeshellarg( $file ) ), true );
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}
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/**
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* Changes filesystem permissions.
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*
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* @since 2.7.0
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*
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* @param string $file Path to the file.
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* @param int|false $mode Optional. The permissions as octal number, usually 0644 for files,
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* 0755 for directories. Default false.
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* @param bool $recursive Optional. If set to true, changes file permissions recursively.
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function chmod( $file, $mode = false, $recursive = false ) {
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if ( ! $this->exists( $file ) ) {
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return false;
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}
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if ( ! $mode ) {
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if ( $this->is_file( $file ) ) {
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$mode = FS_CHMOD_FILE;
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} elseif ( $this->is_dir( $file ) ) {
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$mode = FS_CHMOD_DIR;
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} else {
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return false;
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}
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}
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if ( ! $recursive || ! $this->is_dir( $file ) ) {
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return $this->run_command( sprintf( 'chmod %o %s', $mode, escapeshellarg( $file ) ), true );
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}
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return $this->run_command( sprintf( 'chmod -R %o %s', $mode, escapeshellarg( $file ) ), true );
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}
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/**
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* Changes the owner of a file or directory.
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*
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* @since 2.7.0
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*
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* @param string $file Path to the file or directory.
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* @param string|int $owner A user name or number.
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* @param bool $recursive Optional. If set to true, changes file owner recursively.
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function chown( $file, $owner, $recursive = false ) {
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if ( ! $this->exists( $file ) ) {
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return false;
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}
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if ( ! $recursive || ! $this->is_dir( $file ) ) {
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return $this->run_command( sprintf( 'chown %s %s', escapeshellarg( $owner ), escapeshellarg( $file ) ), true );
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}
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return $this->run_command( sprintf( 'chown -R %s %s', escapeshellarg( $owner ), escapeshellarg( $file ) ), true );
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}
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/**
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* Gets the file owner.
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*
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* @since 2.7.0
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*
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* @param string $file Path to the file.
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* @return string|false Username of the owner on success, false on failure.
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*/
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public function owner( $file ) {
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$owneruid = @fileowner( $this->sftp_path( $file ) );
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if ( ! $owneruid ) {
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return false;
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}
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if ( ! function_exists( 'posix_getpwuid' ) ) {
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return $owneruid;
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}
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$ownerarray = posix_getpwuid( $owneruid );
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if ( ! $ownerarray ) {
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return false;
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}
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return $ownerarray['name'];
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}
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/**
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* Gets the permissions of the specified file or filepath in their octal format.
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*
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* @since 2.7.0
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*
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* @param string $file Path to the file.
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* @return string Mode of the file (the last 3 digits).
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*/
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public function getchmod( $file ) {
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return substr( decoct( @fileperms( $this->sftp_path( $file ) ) ), -3 );
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}
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/**
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* Gets the file's group.
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*
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* @since 2.7.0
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*
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* @param string $file Path to the file.
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* @return string|false The group on success, false on failure.
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*/
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public function group( $file ) {
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$gid = @filegroup( $this->sftp_path( $file ) );
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if ( ! $gid ) {
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return false;
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}
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if ( ! function_exists( 'posix_getgrgid' ) ) {
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return $gid;
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}
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$grouparray = posix_getgrgid( $gid );
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if ( ! $grouparray ) {
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return false;
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}
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return $grouparray['name'];
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}
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/**
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* Copies a file.
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*
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* @since 2.7.0
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*
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* @param string $source Path to the source file.
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* @param string $destination Path to the destination file.
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* @param bool $overwrite Optional. Whether to overwrite the destination file if it exists.
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* Default false.
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* @param int|false $mode Optional. The permissions as octal number, usually 0644 for files,
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* 0755 for dirs. Default false.
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* @return bool True on success, false on failure.
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*/
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public function copy( $source, $destination, $overwrite = false, $mode = false ) {
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if ( ! $overwrite && $this->exists( $destination ) ) {
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return false;
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}
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$content = $this->get_contents( $source );
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if ( false === $content ) {
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return false;
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}
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return $this->put_contents( $destination, $content, $mode );
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}
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/**
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* Moves a file.
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*
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* @since 2.7.0
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*
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* @param string $source Path to the source file.
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* @param string $destination Path to the destination file.
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* @param bool $overwrite Optional. Whether to overwrite the destination file if it exists.
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function move( $source, $destination, $overwrite = false ) {
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if ( $this->exists( $destination ) ) {
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if ( $overwrite ) {
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// We need to remove the destination file before we can rename the source.
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$this->delete( $destination, false, 'f' );
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} else {
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// If we're not overwriting, the rename will fail, so return early.
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return false;
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}
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}
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return ssh2_sftp_rename( $this->sftp_link, $source, $destination );
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}
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/**
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* Deletes a file or directory.
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*
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* @since 2.7.0
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*
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* @param string $file Path to the file or directory.
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* @param bool $recursive Optional. If set to true, deletes files and folders recursively.
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* Default false.
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* @param string|false $type Type of resource. 'f' for file, 'd' for directory.
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* Default false.
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* @return bool True on success, false on failure.
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*/
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public function delete( $file, $recursive = false, $type = false ) {
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if ( 'f' === $type || $this->is_file( $file ) ) {
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return ssh2_sftp_unlink( $this->sftp_link, $file );
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}
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if ( ! $recursive ) {
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return ssh2_sftp_rmdir( $this->sftp_link, $file );
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}
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|
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$filelist = $this->dirlist( $file );
|
|
|
|
if ( is_array( $filelist ) ) {
|
|
foreach ( $filelist as $filename => $fileinfo ) {
|
|
$this->delete( $file . '/' . $filename, $recursive, $fileinfo['type'] );
|
|
}
|
|
}
|
|
|
|
return ssh2_sftp_rmdir( $this->sftp_link, $file );
|
|
}
|
|
|
|
/**
|
|
* Checks if a file or directory exists.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $file Path to file or directory.
|
|
* @return bool Whether $file exists or not.
|
|
*/
|
|
public function exists( $file ) {
|
|
return file_exists( $this->sftp_path( $file ) );
|
|
}
|
|
|
|
/**
|
|
* Checks if resource is a file.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $file File path.
|
|
* @return bool Whether $file is a file.
|
|
*/
|
|
public function is_file( $file ) {
|
|
return is_file( $this->sftp_path( $file ) );
|
|
}
|
|
|
|
/**
|
|
* Checks if resource is a directory.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $path Directory path.
|
|
* @return bool Whether $path is a directory.
|
|
*/
|
|
public function is_dir( $path ) {
|
|
return is_dir( $this->sftp_path( $path ) );
|
|
}
|
|
|
|
/**
|
|
* Checks if a file is readable.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $file Path to file.
|
|
* @return bool Whether $file is readable.
|
|
*/
|
|
public function is_readable( $file ) {
|
|
return is_readable( $this->sftp_path( $file ) );
|
|
}
|
|
|
|
/**
|
|
* Checks if a file or directory is writable.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $file Path to file or directory.
|
|
* @return bool Whether $file is writable.
|
|
*/
|
|
public function is_writable( $file ) {
|
|
// PHP will base its writable checks on system_user === file_owner, not ssh_user === file_owner.
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Gets the file's last access time.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $file Path to file.
|
|
* @return int|false Unix timestamp representing last access time, false on failure.
|
|
*/
|
|
public function atime( $file ) {
|
|
return fileatime( $this->sftp_path( $file ) );
|
|
}
|
|
|
|
/**
|
|
* Gets the file modification time.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $file Path to file.
|
|
* @return int|false Unix timestamp representing modification time, false on failure.
|
|
*/
|
|
public function mtime( $file ) {
|
|
return filemtime( $this->sftp_path( $file ) );
|
|
}
|
|
|
|
/**
|
|
* Gets the file size (in bytes).
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $file Path to file.
|
|
* @return int|false Size of the file in bytes on success, false on failure.
|
|
*/
|
|
public function size( $file ) {
|
|
return filesize( $this->sftp_path( $file ) );
|
|
}
|
|
|
|
/**
|
|
* Sets the access and modification times of a file.
|
|
*
|
|
* Note: Not implemented.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $file Path to file.
|
|
* @param int $time Optional. Modified time to set for file.
|
|
* Default 0.
|
|
* @param int $atime Optional. Access time to set for file.
|
|
* Default 0.
|
|
*/
|
|
public function touch( $file, $time = 0, $atime = 0 ) {
|
|
// Not implemented.
|
|
}
|
|
|
|
/**
|
|
* Creates a directory.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $path Path for new directory.
|
|
* @param int|false $chmod Optional. The permissions as octal number (or false to skip chmod).
|
|
* Default false.
|
|
* @param string|int|false $chown Optional. A user name or number (or false to skip chown).
|
|
* Default false.
|
|
* @param string|int|false $chgrp Optional. A group name or number (or false to skip chgrp).
|
|
* Default false.
|
|
* @return bool True on success, false on failure.
|
|
*/
|
|
public function mkdir( $path, $chmod = false, $chown = false, $chgrp = false ) {
|
|
$path = untrailingslashit( $path );
|
|
|
|
if ( empty( $path ) ) {
|
|
return false;
|
|
}
|
|
|
|
if ( ! $chmod ) {
|
|
$chmod = FS_CHMOD_DIR;
|
|
}
|
|
|
|
if ( ! ssh2_sftp_mkdir( $this->sftp_link, $path, $chmod, true ) ) {
|
|
return false;
|
|
}
|
|
|
|
// Set directory permissions.
|
|
ssh2_sftp_chmod( $this->sftp_link, $path, $chmod );
|
|
|
|
if ( $chown ) {
|
|
$this->chown( $path, $chown );
|
|
}
|
|
|
|
if ( $chgrp ) {
|
|
$this->chgrp( $path, $chgrp );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Deletes a directory.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $path Path to directory.
|
|
* @param bool $recursive Optional. Whether to recursively remove files/directories.
|
|
* Default false.
|
|
* @return bool True on success, false on failure.
|
|
*/
|
|
public function rmdir( $path, $recursive = false ) {
|
|
return $this->delete( $path, $recursive );
|
|
}
|
|
|
|
/**
|
|
* Gets details for files in a directory or a specific file.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $path Path to directory or file.
|
|
* @param bool $include_hidden Optional. Whether to include details of hidden ("." prefixed) files.
|
|
* Default true.
|
|
* @param bool $recursive Optional. Whether to recursively include file details in nested directories.
|
|
* Default false.
|
|
* @return array|false {
|
|
* Array of files. False if unable to list directory contents.
|
|
*
|
|
* @type string $name Name of the file or directory.
|
|
* @type string $perms *nix representation of permissions.
|
|
* @type string $permsn Octal representation of permissions.
|
|
* @type string $owner Owner name or ID.
|
|
* @type int $size Size of file in bytes.
|
|
* @type int $lastmodunix Last modified unix timestamp.
|
|
* @type mixed $lastmod Last modified month (3 letter) and day (without leading 0).
|
|
* @type int $time Last modified time.
|
|
* @type string $type Type of resource. 'f' for file, 'd' for directory.
|
|
* @type mixed $files If a directory and `$recursive` is true, contains another array of files.
|
|
* }
|
|
*/
|
|
public function dirlist( $path, $include_hidden = true, $recursive = false ) {
|
|
if ( $this->is_file( $path ) ) {
|
|
$limit_file = basename( $path );
|
|
$path = dirname( $path );
|
|
} else {
|
|
$limit_file = false;
|
|
}
|
|
|
|
if ( ! $this->is_dir( $path ) || ! $this->is_readable( $path ) ) {
|
|
return false;
|
|
}
|
|
|
|
$ret = array();
|
|
$dir = dir( $this->sftp_path( $path ) );
|
|
|
|
if ( ! $dir ) {
|
|
return false;
|
|
}
|
|
|
|
while ( false !== ( $entry = $dir->read() ) ) {
|
|
$struc = array();
|
|
$struc['name'] = $entry;
|
|
|
|
if ( '.' === $struc['name'] || '..' === $struc['name'] ) {
|
|
continue; // Do not care about these folders.
|
|
}
|
|
|
|
if ( ! $include_hidden && '.' === $struc['name'][0] ) {
|
|
continue;
|
|
}
|
|
|
|
if ( $limit_file && $struc['name'] !== $limit_file ) {
|
|
continue;
|
|
}
|
|
|
|
$struc['perms'] = $this->gethchmod( $path . '/' . $entry );
|
|
$struc['permsn'] = $this->getnumchmodfromh( $struc['perms'] );
|
|
$struc['number'] = false;
|
|
$struc['owner'] = $this->owner( $path . '/' . $entry );
|
|
$struc['group'] = $this->group( $path . '/' . $entry );
|
|
$struc['size'] = $this->size( $path . '/' . $entry );
|
|
$struc['lastmodunix'] = $this->mtime( $path . '/' . $entry );
|
|
$struc['lastmod'] = gmdate( 'M j', $struc['lastmodunix'] );
|
|
$struc['time'] = gmdate( 'h:i:s', $struc['lastmodunix'] );
|
|
$struc['type'] = $this->is_dir( $path . '/' . $entry ) ? 'd' : 'f';
|
|
|
|
if ( 'd' === $struc['type'] ) {
|
|
if ( $recursive ) {
|
|
$struc['files'] = $this->dirlist( $path . '/' . $struc['name'], $include_hidden, $recursive );
|
|
} else {
|
|
$struc['files'] = array();
|
|
}
|
|
}
|
|
|
|
$ret[ $struc['name'] ] = $struc;
|
|
}
|
|
|
|
$dir->close();
|
|
unset( $dir );
|
|
|
|
return $ret;
|
|
}
|
|
}
|