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140 lines
2.9 KiB
PHP
140 lines
2.9 KiB
PHP
<?php
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/**
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* OpenSSH Key Handler
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*
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* PHP version 5
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*
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* Place in $HOME/.ssh/authorized_keys
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*
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* @category Crypt
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* @package Common
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* @author Jim Wigginton <terrafrost@php.net>
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* @copyright 2015 Jim Wigginton
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link http://phpseclib.sourceforge.net
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*/
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namespace phpseclib\Crypt\Common\Keys;
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use ParagonIE\ConstantTime\Base64;
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use phpseclib\Common\Functions\Strings;
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/**
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* OpenSSH Formatted RSA Key Handler
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*
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* @package Common
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* @author Jim Wigginton <terrafrost@php.net>
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* @access public
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*/
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abstract class OpenSSH
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{
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/**
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* Default comment
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*
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* @var string
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* @access private
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*/
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protected static $comment = 'phpseclib-generated-key';
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/**
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* Binary key flag
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*
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* @var bool
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* @access private
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*/
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protected static $binary = false;
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/**
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* Sets the default comment
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*
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* @access public
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* @param string $comment
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*/
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public static function setComment($comment)
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{
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self::$comment = str_replace(["\r", "\n"], '', $comment);
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}
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/**
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* Break a public or private key down into its constituent components
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*
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* $type can be either ssh-dss or ssh-rsa
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*
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* @access public
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* @param string $key
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* @param string $type
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* @return array|bool
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*/
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public static function load($key, $type)
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{
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if (!is_string($key)) {
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return false;
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}
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$parts = explode(' ', $key, 3);
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if (!isset($parts[1])) {
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$key = Base64::decode($parts[0]);
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$comment = isset($parts[1]) ? $parts[1] : false;
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} else {
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if ($parts[0] != $type) {
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return false;
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}
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$key = Base64::decode($parts[1]);
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$comment = isset($parts[2]) ? $parts[2] : false;
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}
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if ($key === false) {
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return false;
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}
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if (substr($key, 0, 11) != "\0\0\0\7$type") {
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return false;
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}
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Strings::shift($key, 11);
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if (strlen($key) <= 4) {
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return false;
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}
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return $key;
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}
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/**
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* Returns the comment for the key
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*
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* @access public
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* @return mixed
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*/
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public static function getComment($key)
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{
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$parts = explode(' ', $key, 3);
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return isset($parts[2]) ? $parts[2] : false;
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}
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/**
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* Toggle between binary and printable keys
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*
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* Printable keys are what are generated by default. These are the ones that go in
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* $HOME/.ssh/authorized_key.
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*
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* @access public
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* @param bool $enabled
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*/
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public static function setBinaryOutput($enabled)
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{
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self::$binary = $enabled;
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}
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/**
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* Returns the current binary output value
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*
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* @access public
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* @return bool
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*/
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public static function getBinaryOutput()
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{
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return (bool) self::$binary;
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}
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}
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