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1759 lines
57 KiB
PHP
1759 lines
57 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Crypt_GPG is a package to use GPG from PHP
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*
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* This file contains an engine that handles GPG subprocess control and I/O.
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* PHP's process manipulation functions are used to handle the GPG subprocess.
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*
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* PHP version 5
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*
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* LICENSE:
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* @category Encryption
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* @package Crypt_GPG
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* @author Nathan Fredrickson <nathan@silverorange.com>
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* @author Michael Gauthier <mike@silverorange.com>
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* @copyright 2005-2010 silverorange
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* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
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* @version CVS: $Id: Engine.php 302822 2010-08-26 17:30:57Z gauthierm $
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* @link http://pear.php.net/package/Crypt_GPG
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* @link http://www.gnupg.org/
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*/
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/**
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* Crypt_GPG base class.
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*/
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require_once 'Crypt/GPG.php';
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/**
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* GPG exception classes.
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*/
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require_once 'Crypt/GPG/Exceptions.php';
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/**
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* Standard PEAR exception is used if GPG binary is not found.
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*/
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require_once 'PEAR/Exception.php';
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// {{{ class Crypt_GPG_Engine
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/**
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* Native PHP Crypt_GPG I/O engine
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*
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* This class is used internally by Crypt_GPG and does not need be used
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* directly. See the {@link Crypt_GPG} class for end-user API.
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*
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* This engine uses PHP's native process control functions to directly control
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* the GPG process. The GPG executable is required to be on the system.
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*
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* All data is passed to the GPG subprocess using file descriptors. This is the
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* most secure method of passing data to the GPG subprocess.
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*
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* @category Encryption
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* @package Crypt_GPG
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* @author Nathan Fredrickson <nathan@silverorange.com>
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* @author Michael Gauthier <mike@silverorange.com>
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* @copyright 2005-2010 silverorange
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* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
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* @link http://pear.php.net/package/Crypt_GPG
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* @link http://www.gnupg.org/
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*/
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class Crypt_GPG_Engine
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{
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// {{{ constants
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/**
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* Size of data chunks that are sent to and retrieved from the IPC pipes.
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*
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* PHP reads 8192 bytes. If this is set to less than 8192, PHP reads 8192
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* and buffers the rest so we might as well just read 8192.
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*
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* Using values other than 8192 also triggers PHP bugs.
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*
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* @see http://bugs.php.net/bug.php?id=35224
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*/
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const CHUNK_SIZE = 8192;
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/**
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* Standard input file descriptor. This is used to pass data to the GPG
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* process.
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*/
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const FD_INPUT = 0;
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/**
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* Standard output file descriptor. This is used to receive normal output
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* from the GPG process.
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*/
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const FD_OUTPUT = 1;
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/**
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* Standard output file descriptor. This is used to receive error output
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* from the GPG process.
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*/
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const FD_ERROR = 2;
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/**
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* GPG status output file descriptor. The status file descriptor outputs
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* detailed information for many GPG commands. See the second section of
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* the file <b>doc/DETAILS</b> in the
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* {@link http://www.gnupg.org/download/ GPG package} for a detailed
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* description of GPG's status output.
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*/
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const FD_STATUS = 3;
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/**
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* Command input file descriptor. This is used for methods requiring
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* passphrases.
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*/
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const FD_COMMAND = 4;
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/**
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* Extra message input file descriptor. This is used for passing signed
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* data when verifying a detached signature.
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*/
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const FD_MESSAGE = 5;
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/**
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* Minimum version of GnuPG that is supported.
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*/
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const MIN_VERSION = '1.0.2';
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// }}}
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// {{{ private class properties
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/**
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* Whether or not to use debugging mode
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*
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* When set to true, every GPG command is echoed before it is run. Sensitive
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* data is always handled using pipes and is not specified as part of the
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* command. As a result, sensitive data is never displayed when debug is
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* enabled. Sensitive data includes private key data and passphrases.
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*
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* Debugging is off by default.
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*
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* @var boolean
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* @see Crypt_GPG_Engine::__construct()
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*/
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private $_debug = false;
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/**
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* Location of GPG binary
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*
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* @var string
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* @see Crypt_GPG_Engine::__construct()
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* @see Crypt_GPG_Engine::_getBinary()
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*/
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private $_binary = '';
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/**
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* Directory containing the GPG key files
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*
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* This property only contains the path when the <i>homedir</i> option
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* is specified in the constructor.
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*
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* @var string
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* @see Crypt_GPG_Engine::__construct()
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*/
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private $_homedir = '';
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/**
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* File path of the public keyring
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*
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* This property only contains the file path when the <i>public_keyring</i>
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* option is specified in the constructor.
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*
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* If the specified file path starts with <kbd>~/</kbd>, the path is
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* relative to the <i>homedir</i> if specified, otherwise to
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* <kbd>~/.gnupg</kbd>.
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*
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* @var string
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* @see Crypt_GPG_Engine::__construct()
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*/
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private $_publicKeyring = '';
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/**
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* File path of the private (secret) keyring
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*
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* This property only contains the file path when the <i>private_keyring</i>
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* option is specified in the constructor.
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*
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* If the specified file path starts with <kbd>~/</kbd>, the path is
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* relative to the <i>homedir</i> if specified, otherwise to
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* <kbd>~/.gnupg</kbd>.
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*
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* @var string
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* @see Crypt_GPG_Engine::__construct()
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*/
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private $_privateKeyring = '';
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/**
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* File path of the trust database
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*
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* This property only contains the file path when the <i>trust_db</i>
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* option is specified in the constructor.
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*
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* If the specified file path starts with <kbd>~/</kbd>, the path is
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* relative to the <i>homedir</i> if specified, otherwise to
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* <kbd>~/.gnupg</kbd>.
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*
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* @var string
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* @see Crypt_GPG_Engine::__construct()
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*/
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private $_trustDb = '';
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/**
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* Array of pipes used for communication with the GPG binary
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*
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* This is an array of file descriptor resources.
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*
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* @var array
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*/
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private $_pipes = array();
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/**
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* Array of currently opened pipes
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*
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* This array is used to keep track of remaining opened pipes so they can
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* be closed when the GPG subprocess is finished. This array is a subset of
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* the {@link Crypt_GPG_Engine::$_pipes} array and contains opened file
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* descriptor resources.
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*
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* @var array
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* @see Crypt_GPG_Engine::_closePipe()
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*/
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private $_openPipes = array();
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/**
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* A handle for the GPG process
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*
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* @var resource
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*/
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private $_process = null;
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/**
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* Whether or not the operating system is Darwin (OS X)
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*
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* @var boolean
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*/
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private $_isDarwin = false;
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/**
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* Commands to be sent to GPG's command input stream
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*
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* @var string
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* @see Crypt_GPG_Engine::sendCommand()
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*/
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private $_commandBuffer = '';
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/**
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* Array of status line handlers
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*
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* @var array
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* @see Crypt_GPG_Engine::addStatusHandler()
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*/
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private $_statusHandlers = array();
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/**
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* Array of error line handlers
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*
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* @var array
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* @see Crypt_GPG_Engine::addErrorHandler()
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*/
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private $_errorHandlers = array();
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/**
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* The error code of the current operation
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*
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* @var integer
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* @see Crypt_GPG_Engine::getErrorCode()
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*/
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private $_errorCode = Crypt_GPG::ERROR_NONE;
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/**
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* File related to the error code of the current operation
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*
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* @var string
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* @see Crypt_GPG_Engine::getErrorFilename()
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*/
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private $_errorFilename = '';
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/**
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* Key id related to the error code of the current operation
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*
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* @var string
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* @see Crypt_GPG_Engine::getErrorKeyId()
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*/
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private $_errorkeyId = '';
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/**
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* The number of currently needed passphrases
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*
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* If this is not zero when the GPG command is completed, the error code is
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* set to {@link Crypt_GPG::ERROR_MISSING_PASSPHRASE}.
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*
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* @var integer
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*/
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private $_needPassphrase = 0;
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/**
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* The input source
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*
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* This is data to send to GPG. Either a string or a stream resource.
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*
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* @var string|resource
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* @see Crypt_GPG_Engine::setInput()
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*/
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private $_input = null;
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/**
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* The extra message input source
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*
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* Either a string or a stream resource.
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*
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* @var string|resource
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* @see Crypt_GPG_Engine::setMessage()
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*/
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private $_message = null;
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/**
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* The output location
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*
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* This is where the output from GPG is sent. Either a string or a stream
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* resource.
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*
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* @var string|resource
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* @see Crypt_GPG_Engine::setOutput()
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*/
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private $_output = '';
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/**
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* The GPG operation to execute
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*
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* @var string
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* @see Crypt_GPG_Engine::setOperation()
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*/
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private $_operation;
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/**
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* Arguments for the current operation
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*
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* @var array
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* @see Crypt_GPG_Engine::setOperation()
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*/
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private $_arguments = array();
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/**
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* The version number of the GPG binary
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*
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* @var string
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* @see Crypt_GPG_Engine::getVersion()
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*/
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private $_version = '';
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/**
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* Cached value indicating whether or not mbstring function overloading is
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* on for strlen
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*
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* This is cached for optimal performance inside the I/O loop.
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*
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* @var boolean
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* @see Crypt_GPG_Engine::_byteLength()
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* @see Crypt_GPG_Engine::_byteSubstring()
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*/
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private static $_mbStringOverload = null;
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// }}}
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// {{{ __construct()
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/**
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* Creates a new GPG engine
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*
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* Available options are:
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*
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* - <kbd>string homedir</kbd> - the directory where the GPG
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* keyring files are stored. If not
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* specified, Crypt_GPG uses the
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* default of <kbd>~/.gnupg</kbd>.
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* - <kbd>string publicKeyring</kbd> - the file path of the public
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* keyring. Use this if the public
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* keyring is not in the homedir, or
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* if the keyring is in a directory
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* not writable by the process
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* invoking GPG (like Apache). Then
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* you can specify the path to the
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* keyring with this option
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* (/foo/bar/pubring.gpg), and specify
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* a writable directory (like /tmp)
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* using the <i>homedir</i> option.
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* - <kbd>string privateKeyring</kbd> - the file path of the private
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* keyring. Use this if the private
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* keyring is not in the homedir, or
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* if the keyring is in a directory
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* not writable by the process
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* invoking GPG (like Apache). Then
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* you can specify the path to the
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* keyring with this option
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* (/foo/bar/secring.gpg), and specify
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* a writable directory (like /tmp)
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* using the <i>homedir</i> option.
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* - <kbd>string trustDb</kbd> - the file path of the web-of-trust
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* database. Use this if the trust
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* database is not in the homedir, or
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* if the database is in a directory
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* not writable by the process
|
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* invoking GPG (like Apache). Then
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* you can specify the path to the
|
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* trust database with this option
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* (/foo/bar/trustdb.gpg), and specify
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* a writable directory (like /tmp)
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* using the <i>homedir</i> option.
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* - <kbd>string binary</kbd> - the location of the GPG binary. If
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* not specified, the driver attempts
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* to auto-detect the GPG binary
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* location using a list of known
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* default locations for the current
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* operating system. The option
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* <kbd>gpgBinary</kbd> is a
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* deprecated alias for this option.
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* - <kbd>boolean debug</kbd> - whether or not to use debug mode.
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* When debug mode is on, all
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* communication to and from the GPG
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* subprocess is logged. This can be
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* useful to diagnose errors when
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* using Crypt_GPG.
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*
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* @param array $options optional. An array of options used to create the
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* GPG object. All options are optional and are
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* represented as key-value pairs.
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*
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* @throws Crypt_GPG_FileException if the <kbd>homedir</kbd> does not exist
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* and cannot be created. This can happen if <kbd>homedir</kbd> is
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* not specified, Crypt_GPG is run as the web user, and the web
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* user has no home directory. This exception is also thrown if any
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* of the options <kbd>publicKeyring</kbd>,
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* <kbd>privateKeyring</kbd> or <kbd>trustDb</kbd> options are
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* specified but the files do not exist or are are not readable.
|
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* This can happen if the user running the Crypt_GPG process (for
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* example, the Apache user) does not have permission to read the
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* files.
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*
|
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* @throws PEAR_Exception if the provided <kbd>binary</kbd> is invalid, or
|
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* if no <kbd>binary</kbd> is provided and no suitable binary could
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* be found.
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*/
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public function __construct(array $options = array())
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{
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$this->_isDarwin = (strncmp(strtoupper(PHP_OS), 'DARWIN', 6) === 0);
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|
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// populate mbstring overloading cache if not set
|
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if (self::$_mbStringOverload === null) {
|
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self::$_mbStringOverload = (extension_loaded('mbstring')
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&& (ini_get('mbstring.func_overload') & 0x02) === 0x02);
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}
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// get homedir
|
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if (array_key_exists('homedir', $options)) {
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$this->_homedir = (string)$options['homedir'];
|
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} else {
|
|
// note: this requires the package OS dep exclude 'windows'
|
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$info = posix_getpwuid(posix_getuid());
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$this->_homedir = $info['dir'].'/.gnupg';
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}
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// attempt to create homedir if it does not exist
|
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if (!is_dir($this->_homedir)) {
|
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if (@mkdir($this->_homedir, 0777, true)) {
|
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// Set permissions on homedir. Parent directories are created
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// with 0777, homedir is set to 0700.
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chmod($this->_homedir, 0700);
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} else {
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throw new Crypt_GPG_FileException('The \'homedir\' "' .
|
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$this->_homedir . '" is not readable or does not exist '.
|
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'and cannot be created. This can happen if \'homedir\' '.
|
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'is not specified in the Crypt_GPG options, Crypt_GPG is '.
|
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'run as the web user, and the web user has no home '.
|
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'directory.',
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0, $this->_homedir);
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}
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}
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|
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// get binary
|
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if (array_key_exists('binary', $options)) {
|
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$this->_binary = (string)$options['binary'];
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} elseif (array_key_exists('gpgBinary', $options)) {
|
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// deprecated alias
|
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$this->_binary = (string)$options['gpgBinary'];
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} else {
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$this->_binary = $this->_getBinary();
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}
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if ($this->_binary == '' || !is_executable($this->_binary)) {
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throw new PEAR_Exception('GPG binary not found. If you are sure '.
|
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'the GPG binary is installed, please specify the location of '.
|
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'the GPG binary using the \'binary\' driver option.');
|
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}
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|
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/*
|
|
* Note:
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*
|
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* Normally, GnuPG expects keyrings to be in the homedir and expects
|
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* to be able to write temporary files in the homedir. Sometimes,
|
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* keyrings are not in the homedir, or location of the keyrings does
|
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* not allow writing temporary files. In this case, the <i>homedir</i>
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|
* option by itself is not enough to specify the keyrings because GnuPG
|
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* can not write required temporary files. Additional options are
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* provided so you can specify the location of the keyrings separately
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* from the homedir.
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*/
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// get public keyring
|
|
if (array_key_exists('publicKeyring', $options)) {
|
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$this->_publicKeyring = (string)$options['publicKeyring'];
|
|
if (!is_readable($this->_publicKeyring)) {
|
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throw new Crypt_GPG_FileException('The \'publicKeyring\' "' .
|
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$this->_publicKeyring . '" does not exist or is ' .
|
|
'not readable. Check the location and ensure the file ' .
|
|
'permissions are correct.', 0, $this->_publicKeyring);
|
|
}
|
|
}
|
|
|
|
// get private keyring
|
|
if (array_key_exists('privateKeyring', $options)) {
|
|
$this->_privateKeyring = (string)$options['privateKeyring'];
|
|
if (!is_readable($this->_privateKeyring)) {
|
|
throw new Crypt_GPG_FileException('The \'privateKeyring\' "' .
|
|
$this->_privateKeyring . '" does not exist or is ' .
|
|
'not readable. Check the location and ensure the file ' .
|
|
'permissions are correct.', 0, $this->_privateKeyring);
|
|
}
|
|
}
|
|
|
|
// get trust database
|
|
if (array_key_exists('trustDb', $options)) {
|
|
$this->_trustDb = (string)$options['trustDb'];
|
|
if (!is_readable($this->_trustDb)) {
|
|
throw new Crypt_GPG_FileException('The \'trustDb\' "' .
|
|
$this->_trustDb . '" does not exist or is not readable. ' .
|
|
'Check the location and ensure the file permissions are ' .
|
|
'correct.', 0, $this->_trustDb);
|
|
}
|
|
}
|
|
|
|
if (array_key_exists('debug', $options)) {
|
|
$this->_debug = (boolean)$options['debug'];
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ __destruct()
|
|
|
|
/**
|
|
* Closes open GPG subprocesses when this object is destroyed
|
|
*
|
|
* Subprocesses should never be left open by this class unless there is
|
|
* an unknown error and unexpected script termination occurs.
|
|
*/
|
|
public function __destruct()
|
|
{
|
|
$this->_closeSubprocess();
|
|
}
|
|
|
|
// }}}
|
|
// {{{ addErrorHandler()
|
|
|
|
/**
|
|
* Adds an error handler method
|
|
*
|
|
* The method is run every time a new error line is received from the GPG
|
|
* subprocess. The handler method must accept the error line to be handled
|
|
* as its first parameter.
|
|
*
|
|
* @param callback $callback the callback method to use.
|
|
* @param array $args optional. Additional arguments to pass as
|
|
* parameters to the callback method.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function addErrorHandler($callback, array $args = array())
|
|
{
|
|
$this->_errorHandlers[] = array(
|
|
'callback' => $callback,
|
|
'args' => $args
|
|
);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ addStatusHandler()
|
|
|
|
/**
|
|
* Adds a status handler method
|
|
*
|
|
* The method is run every time a new status line is received from the
|
|
* GPG subprocess. The handler method must accept the status line to be
|
|
* handled as its first parameter.
|
|
*
|
|
* @param callback $callback the callback method to use.
|
|
* @param array $args optional. Additional arguments to pass as
|
|
* parameters to the callback method.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function addStatusHandler($callback, array $args = array())
|
|
{
|
|
$this->_statusHandlers[] = array(
|
|
'callback' => $callback,
|
|
'args' => $args
|
|
);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ sendCommand()
|
|
|
|
/**
|
|
* Sends a command to the GPG subprocess over the command file-descriptor
|
|
* pipe
|
|
*
|
|
* @param string $command the command to send.
|
|
*
|
|
* @return void
|
|
*
|
|
* @sensitive $command
|
|
*/
|
|
public function sendCommand($command)
|
|
{
|
|
if (array_key_exists(self::FD_COMMAND, $this->_openPipes)) {
|
|
$this->_commandBuffer .= $command . PHP_EOL;
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ reset()
|
|
|
|
/**
|
|
* Resets the GPG engine, preparing it for a new operation
|
|
*
|
|
* @return void
|
|
*
|
|
* @see Crypt_GPG_Engine::run()
|
|
* @see Crypt_GPG_Engine::setOperation()
|
|
*/
|
|
public function reset()
|
|
{
|
|
$this->_operation = '';
|
|
$this->_arguments = array();
|
|
$this->_input = null;
|
|
$this->_message = null;
|
|
$this->_output = '';
|
|
$this->_errorCode = Crypt_GPG::ERROR_NONE;
|
|
$this->_needPassphrase = 0;
|
|
$this->_commandBuffer = '';
|
|
|
|
$this->_statusHandlers = array();
|
|
$this->_errorHandlers = array();
|
|
|
|
$this->addStatusHandler(array($this, '_handleErrorStatus'));
|
|
$this->addErrorHandler(array($this, '_handleErrorError'));
|
|
|
|
if ($this->_debug) {
|
|
$this->addStatusHandler(array($this, '_handleDebugStatus'));
|
|
$this->addErrorHandler(array($this, '_handleDebugError'));
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ run()
|
|
|
|
/**
|
|
* Runs the current GPG operation
|
|
*
|
|
* This creates and manages the GPG subprocess.
|
|
*
|
|
* The operation must be set with {@link Crypt_GPG_Engine::setOperation()}
|
|
* before this method is called.
|
|
*
|
|
* @return void
|
|
*
|
|
* @throws Crypt_GPG_InvalidOperationException if no operation is specified.
|
|
*
|
|
* @see Crypt_GPG_Engine::reset()
|
|
* @see Crypt_GPG_Engine::setOperation()
|
|
*/
|
|
public function run()
|
|
{
|
|
if ($this->_operation === '') {
|
|
throw new Crypt_GPG_InvalidOperationException('No GPG operation ' .
|
|
'specified. Use Crypt_GPG_Engine::setOperation() before ' .
|
|
'calling Crypt_GPG_Engine::run().');
|
|
}
|
|
|
|
$this->_openSubprocess();
|
|
$this->_process();
|
|
$this->_closeSubprocess();
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getErrorCode()
|
|
|
|
/**
|
|
* Gets the error code of the last executed operation
|
|
*
|
|
* This value is only meaningful after {@link Crypt_GPG_Engine::run()} has
|
|
* been executed.
|
|
*
|
|
* @return integer the error code of the last executed operation.
|
|
*/
|
|
public function getErrorCode()
|
|
{
|
|
return $this->_errorCode;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getErrorFilename()
|
|
|
|
/**
|
|
* Gets the file related to the error code of the last executed operation
|
|
*
|
|
* This value is only meaningful after {@link Crypt_GPG_Engine::run()} has
|
|
* been executed. If there is no file related to the error, an empty string
|
|
* is returned.
|
|
*
|
|
* @return string the file related to the error code of the last executed
|
|
* operation.
|
|
*/
|
|
public function getErrorFilename()
|
|
{
|
|
return $this->_errorFilename;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getErrorKeyId()
|
|
|
|
/**
|
|
* Gets the key id related to the error code of the last executed operation
|
|
*
|
|
* This value is only meaningful after {@link Crypt_GPG_Engine::run()} has
|
|
* been executed. If there is no key id related to the error, an empty
|
|
* string is returned.
|
|
*
|
|
* @return string the key id related to the error code of the last executed
|
|
* operation.
|
|
*/
|
|
public function getErrorKeyId()
|
|
{
|
|
return $this->_errorKeyId;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ setInput()
|
|
|
|
/**
|
|
* Sets the input source for the current GPG operation
|
|
*
|
|
* @param string|resource &$input either a reference to the string
|
|
* containing the input data or an open
|
|
* stream resource containing the input
|
|
* data.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setInput(&$input)
|
|
{
|
|
$this->_input =& $input;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ setMessage()
|
|
|
|
/**
|
|
* Sets the message source for the current GPG operation
|
|
*
|
|
* Detached signature data should be specified here.
|
|
*
|
|
* @param string|resource &$message either a reference to the string
|
|
* containing the message data or an open
|
|
* stream resource containing the message
|
|
* data.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setMessage(&$message)
|
|
{
|
|
$this->_message =& $message;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ setOutput()
|
|
|
|
/**
|
|
* Sets the output destination for the current GPG operation
|
|
*
|
|
* @param string|resource &$output either a reference to the string in
|
|
* which to store GPG output or an open
|
|
* stream resource to which the output data
|
|
* should be written.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setOutput(&$output)
|
|
{
|
|
$this->_output =& $output;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ setOperation()
|
|
|
|
/**
|
|
* Sets the operation to perform
|
|
*
|
|
* @param string $operation the operation to perform. This should be one
|
|
* of GPG's operations. For example,
|
|
* <kbd>--encrypt</kbd>, <kbd>--decrypt</kbd>,
|
|
* <kbd>--sign</kbd>, etc.
|
|
* @param array $arguments optional. Additional arguments for the GPG
|
|
* subprocess. See the GPG manual for specific
|
|
* values.
|
|
*
|
|
* @return void
|
|
*
|
|
* @see Crypt_GPG_Engine::reset()
|
|
* @see Crypt_GPG_Engine::run()
|
|
*/
|
|
public function setOperation($operation, array $arguments = array())
|
|
{
|
|
$this->_operation = $operation;
|
|
$this->_arguments = $arguments;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ getVersion()
|
|
|
|
/**
|
|
* Gets the version of the GnuPG binary
|
|
*
|
|
* @return string a version number string containing the version of GnuPG
|
|
* being used. This value is suitable to use with PHP's
|
|
* version_compare() function.
|
|
*
|
|
* @throws Crypt_GPG_Exception if an unknown or unexpected error occurs.
|
|
* Use the <kbd>debug</kbd> option and file a bug report if these
|
|
* exceptions occur.
|
|
*
|
|
* @throws Crypt_GPG_UnsupportedException if the provided binary is not
|
|
* GnuPG or if the GnuPG version is less than 1.0.2.
|
|
*/
|
|
public function getVersion()
|
|
{
|
|
if ($this->_version == '') {
|
|
|
|
$options = array(
|
|
'homedir' => $this->_homedir,
|
|
'binary' => $this->_binary,
|
|
'debug' => $this->_debug
|
|
);
|
|
|
|
$engine = new self($options);
|
|
$info = '';
|
|
|
|
// Set a garbage version so we do not end up looking up the version
|
|
// recursively.
|
|
$engine->_version = '1.0.0';
|
|
|
|
$engine->reset();
|
|
$engine->setOutput($info);
|
|
$engine->setOperation('--version');
|
|
$engine->run();
|
|
|
|
$code = $this->getErrorCode();
|
|
|
|
if ($code !== Crypt_GPG::ERROR_NONE) {
|
|
throw new Crypt_GPG_Exception(
|
|
'Unknown error getting GnuPG version information. Please ' .
|
|
'use the \'debug\' option when creating the Crypt_GPG ' .
|
|
'object, and file a bug report at ' . Crypt_GPG::BUG_URI,
|
|
$code);
|
|
}
|
|
|
|
$matches = array();
|
|
$expression = '/gpg \(GnuPG\) (\S+)/';
|
|
|
|
if (preg_match($expression, $info, $matches) === 1) {
|
|
$this->_version = $matches[1];
|
|
} else {
|
|
throw new Crypt_GPG_Exception(
|
|
'No GnuPG version information provided by the binary "' .
|
|
$this->_binary . '". Are you sure it is GnuPG?');
|
|
}
|
|
|
|
if (version_compare($this->_version, self::MIN_VERSION, 'lt')) {
|
|
throw new Crypt_GPG_Exception(
|
|
'The version of GnuPG being used (' . $this->_version .
|
|
') is not supported by Crypt_GPG. The minimum version ' .
|
|
'required by Crypt_GPG is ' . self::MIN_VERSION);
|
|
}
|
|
}
|
|
|
|
|
|
return $this->_version;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _handleErrorStatus()
|
|
|
|
/**
|
|
* Handles error values in the status output from GPG
|
|
*
|
|
* This method is responsible for setting the
|
|
* {@link Crypt_GPG_Engine::$_errorCode}. See <b>doc/DETAILS</b> in the
|
|
* {@link http://www.gnupg.org/download/ GPG distribution} for detailed
|
|
* information on GPG's status output.
|
|
*
|
|
* @param string $line the status line to handle.
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _handleErrorStatus($line)
|
|
{
|
|
$tokens = explode(' ', $line);
|
|
switch ($tokens[0]) {
|
|
case 'BAD_PASSPHRASE':
|
|
$this->_errorCode = Crypt_GPG::ERROR_BAD_PASSPHRASE;
|
|
break;
|
|
|
|
case 'MISSING_PASSPHRASE':
|
|
$this->_errorCode = Crypt_GPG::ERROR_MISSING_PASSPHRASE;
|
|
break;
|
|
|
|
case 'NODATA':
|
|
$this->_errorCode = Crypt_GPG::ERROR_NO_DATA;
|
|
break;
|
|
|
|
case 'DELETE_PROBLEM':
|
|
if ($tokens[1] == '1') {
|
|
$this->_errorCode = Crypt_GPG::ERROR_KEY_NOT_FOUND;
|
|
break;
|
|
} elseif ($tokens[1] == '2') {
|
|
$this->_errorCode = Crypt_GPG::ERROR_DELETE_PRIVATE_KEY;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 'IMPORT_RES':
|
|
if ($tokens[12] > 0) {
|
|
$this->_errorCode = Crypt_GPG::ERROR_DUPLICATE_KEY;
|
|
}
|
|
break;
|
|
|
|
case 'NO_PUBKEY':
|
|
case 'NO_SECKEY':
|
|
$this->_errorKeyId = $tokens[1];
|
|
$this->_errorCode = Crypt_GPG::ERROR_KEY_NOT_FOUND;
|
|
break;
|
|
|
|
case 'NEED_PASSPHRASE':
|
|
$this->_needPassphrase++;
|
|
break;
|
|
|
|
case 'GOOD_PASSPHRASE':
|
|
$this->_needPassphrase--;
|
|
break;
|
|
|
|
case 'EXPSIG':
|
|
case 'EXPKEYSIG':
|
|
case 'REVKEYSIG':
|
|
case 'BADSIG':
|
|
$this->_errorCode = Crypt_GPG::ERROR_BAD_SIGNATURE;
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _handleErrorError()
|
|
|
|
/**
|
|
* Handles error values in the error output from GPG
|
|
*
|
|
* This method is responsible for setting the
|
|
* {@link Crypt_GPG_Engine::$_errorCode}.
|
|
*
|
|
* @param string $line the error line to handle.
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _handleErrorError($line)
|
|
{
|
|
if ($this->_errorCode === Crypt_GPG::ERROR_NONE) {
|
|
$pattern = '/no valid OpenPGP data found/';
|
|
if (preg_match($pattern, $line) === 1) {
|
|
$this->_errorCode = Crypt_GPG::ERROR_NO_DATA;
|
|
}
|
|
}
|
|
|
|
if ($this->_errorCode === Crypt_GPG::ERROR_NONE) {
|
|
$pattern = '/No secret key|secret key not available/';
|
|
if (preg_match($pattern, $line) === 1) {
|
|
$this->_errorCode = Crypt_GPG::ERROR_KEY_NOT_FOUND;
|
|
}
|
|
}
|
|
|
|
if ($this->_errorCode === Crypt_GPG::ERROR_NONE) {
|
|
$pattern = '/No public key|public key not found/';
|
|
if (preg_match($pattern, $line) === 1) {
|
|
$this->_errorCode = Crypt_GPG::ERROR_KEY_NOT_FOUND;
|
|
}
|
|
}
|
|
|
|
if ($this->_errorCode === Crypt_GPG::ERROR_NONE) {
|
|
$matches = array();
|
|
$pattern = '/can\'t (?:access|open) `(.*?)\'/';
|
|
if (preg_match($pattern, $line, $matches) === 1) {
|
|
$this->_errorFilename = $matches[1];
|
|
$this->_errorCode = Crypt_GPG::ERROR_FILE_PERMISSIONS;
|
|
}
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _handleDebugStatus()
|
|
|
|
/**
|
|
* Displays debug output for status lines
|
|
*
|
|
* @param string $line the status line to handle.
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _handleDebugStatus($line)
|
|
{
|
|
$this->_debug('STATUS: ' . $line);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _handleDebugError()
|
|
|
|
/**
|
|
* Displays debug output for error lines
|
|
*
|
|
* @param string $line the error line to handle.
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _handleDebugError($line)
|
|
{
|
|
$this->_debug('ERROR: ' . $line);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _process()
|
|
|
|
/**
|
|
* Performs internal streaming operations for the subprocess using either
|
|
* strings or streams as input / output points
|
|
*
|
|
* This is the main I/O loop for streaming to and from the GPG subprocess.
|
|
*
|
|
* The implementation of this method is verbose mainly for performance
|
|
* reasons. Adding streams to a lookup array and looping the array inside
|
|
* the main I/O loop would be siginficantly slower for large streams.
|
|
*
|
|
* @return void
|
|
*
|
|
* @throws Crypt_GPG_Exception if there is an error selecting streams for
|
|
* reading or writing. If this occurs, please file a bug report at
|
|
* http://pear.php.net/bugs/report.php?package=Crypt_GPG.
|
|
*/
|
|
private function _process()
|
|
{
|
|
$this->_debug('BEGIN PROCESSING');
|
|
|
|
$this->_commandBuffer = ''; // buffers input to GPG
|
|
$messageBuffer = ''; // buffers input to GPG
|
|
$inputBuffer = ''; // buffers input to GPG
|
|
$outputBuffer = ''; // buffers output from GPG
|
|
$statusBuffer = ''; // buffers output from GPG
|
|
$errorBuffer = ''; // buffers output from GPG
|
|
$inputComplete = false; // input stream is completely buffered
|
|
$messageComplete = false; // message stream is completely buffered
|
|
|
|
if (is_string($this->_input)) {
|
|
$inputBuffer = $this->_input;
|
|
$inputComplete = true;
|
|
}
|
|
|
|
if (is_string($this->_message)) {
|
|
$messageBuffer = $this->_message;
|
|
$messageComplete = true;
|
|
}
|
|
|
|
if (is_string($this->_output)) {
|
|
$outputBuffer =& $this->_output;
|
|
}
|
|
|
|
// convenience variables
|
|
$fdInput = $this->_pipes[self::FD_INPUT];
|
|
$fdOutput = $this->_pipes[self::FD_OUTPUT];
|
|
$fdError = $this->_pipes[self::FD_ERROR];
|
|
$fdStatus = $this->_pipes[self::FD_STATUS];
|
|
$fdCommand = $this->_pipes[self::FD_COMMAND];
|
|
$fdMessage = $this->_pipes[self::FD_MESSAGE];
|
|
|
|
while (true) {
|
|
|
|
$inputStreams = array();
|
|
$outputStreams = array();
|
|
$exceptionStreams = array();
|
|
|
|
// set up input streams
|
|
if (is_resource($this->_input) && !$inputComplete) {
|
|
if (feof($this->_input)) {
|
|
$inputComplete = true;
|
|
} else {
|
|
$inputStreams[] = $this->_input;
|
|
}
|
|
}
|
|
|
|
// close GPG input pipe if there is no more data
|
|
if ($inputBuffer == '' && $inputComplete) {
|
|
$this->_debug('=> closing GPG input pipe');
|
|
$this->_closePipe(self::FD_INPUT);
|
|
}
|
|
|
|
if (is_resource($this->_message) && !$messageComplete) {
|
|
if (feof($this->_message)) {
|
|
$messageComplete = true;
|
|
} else {
|
|
$inputStreams[] = $this->_message;
|
|
}
|
|
}
|
|
|
|
// close GPG message pipe if there is no more data
|
|
if ($messageBuffer == '' && $messageComplete) {
|
|
$this->_debug('=> closing GPG message pipe');
|
|
$this->_closePipe(self::FD_MESSAGE);
|
|
}
|
|
|
|
if (!feof($fdOutput)) {
|
|
$inputStreams[] = $fdOutput;
|
|
}
|
|
|
|
if (!feof($fdStatus)) {
|
|
$inputStreams[] = $fdStatus;
|
|
}
|
|
|
|
if (!feof($fdError)) {
|
|
$inputStreams[] = $fdError;
|
|
}
|
|
|
|
// set up output streams
|
|
if ($outputBuffer != '' && is_resource($this->_output)) {
|
|
$outputStreams[] = $this->_output;
|
|
}
|
|
|
|
if ($this->_commandBuffer != '') {
|
|
$outputStreams[] = $fdCommand;
|
|
}
|
|
|
|
if ($messageBuffer != '') {
|
|
$outputStreams[] = $fdMessage;
|
|
}
|
|
|
|
if ($inputBuffer != '') {
|
|
$outputStreams[] = $fdInput;
|
|
}
|
|
|
|
// no streams left to read or write, we're all done
|
|
if (count($inputStreams) === 0 && count($outputStreams) === 0) {
|
|
break;
|
|
}
|
|
|
|
$this->_debug('selecting streams');
|
|
|
|
$ready = stream_select(
|
|
$inputStreams,
|
|
$outputStreams,
|
|
$exceptionStreams,
|
|
null
|
|
);
|
|
|
|
$this->_debug('=> got ' . $ready);
|
|
|
|
if ($ready === false) {
|
|
throw new Crypt_GPG_Exception(
|
|
'Error selecting stream for communication with GPG ' .
|
|
'subprocess. Please file a bug report at: ' .
|
|
'http://pear.php.net/bugs/report.php?package=Crypt_GPG');
|
|
}
|
|
|
|
if ($ready === 0) {
|
|
throw new Crypt_GPG_Exception(
|
|
'stream_select() returned 0. This can not happen! Please ' .
|
|
'file a bug report at: ' .
|
|
'http://pear.php.net/bugs/report.php?package=Crypt_GPG');
|
|
}
|
|
|
|
// write input (to GPG)
|
|
if (in_array($fdInput, $outputStreams)) {
|
|
$this->_debug('GPG is ready for input');
|
|
|
|
$chunk = self::_byteSubstring(
|
|
$inputBuffer,
|
|
0,
|
|
self::CHUNK_SIZE
|
|
);
|
|
|
|
$length = self::_byteLength($chunk);
|
|
|
|
$this->_debug(
|
|
'=> about to write ' . $length . ' bytes to GPG input'
|
|
);
|
|
|
|
$length = fwrite($fdInput, $chunk, $length);
|
|
|
|
$this->_debug('=> wrote ' . $length . ' bytes');
|
|
|
|
$inputBuffer = self::_byteSubstring(
|
|
$inputBuffer,
|
|
$length
|
|
);
|
|
}
|
|
|
|
// read input (from PHP stream)
|
|
if (in_array($this->_input, $inputStreams)) {
|
|
$this->_debug('input stream is ready for reading');
|
|
$this->_debug(
|
|
'=> about to read ' . self::CHUNK_SIZE .
|
|
' bytes from input stream'
|
|
);
|
|
|
|
$chunk = fread($this->_input, self::CHUNK_SIZE);
|
|
$length = self::_byteLength($chunk);
|
|
$inputBuffer .= $chunk;
|
|
|
|
$this->_debug('=> read ' . $length . ' bytes');
|
|
}
|
|
|
|
// write message (to GPG)
|
|
if (in_array($fdMessage, $outputStreams)) {
|
|
$this->_debug('GPG is ready for message data');
|
|
|
|
$chunk = self::_byteSubstring(
|
|
$messageBuffer,
|
|
0,
|
|
self::CHUNK_SIZE
|
|
);
|
|
|
|
$length = self::_byteLength($chunk);
|
|
|
|
$this->_debug(
|
|
'=> about to write ' . $length . ' bytes to GPG message'
|
|
);
|
|
|
|
$length = fwrite($fdMessage, $chunk, $length);
|
|
$this->_debug('=> wrote ' . $length . ' bytes');
|
|
|
|
$messageBuffer = self::_byteSubstring($messageBuffer, $length);
|
|
}
|
|
|
|
// read message (from PHP stream)
|
|
if (in_array($this->_message, $inputStreams)) {
|
|
$this->_debug('message stream is ready for reading');
|
|
$this->_debug(
|
|
'=> about to read ' . self::CHUNK_SIZE .
|
|
' bytes from message stream'
|
|
);
|
|
|
|
$chunk = fread($this->_message, self::CHUNK_SIZE);
|
|
$length = self::_byteLength($chunk);
|
|
$messageBuffer .= $chunk;
|
|
|
|
$this->_debug('=> read ' . $length . ' bytes');
|
|
}
|
|
|
|
// read output (from GPG)
|
|
if (in_array($fdOutput, $inputStreams)) {
|
|
$this->_debug('GPG output stream ready for reading');
|
|
$this->_debug(
|
|
'=> about to read ' . self::CHUNK_SIZE .
|
|
' bytes from GPG output'
|
|
);
|
|
|
|
$chunk = fread($fdOutput, self::CHUNK_SIZE);
|
|
$length = self::_byteLength($chunk);
|
|
$outputBuffer .= $chunk;
|
|
|
|
$this->_debug('=> read ' . $length . ' bytes');
|
|
}
|
|
|
|
// write output (to PHP stream)
|
|
if (in_array($this->_output, $outputStreams)) {
|
|
$this->_debug('output stream is ready for data');
|
|
|
|
$chunk = self::_byteSubstring(
|
|
$outputBuffer,
|
|
0,
|
|
self::CHUNK_SIZE
|
|
);
|
|
|
|
$length = self::_byteLength($chunk);
|
|
|
|
$this->_debug(
|
|
'=> about to write ' . $length . ' bytes to output stream'
|
|
);
|
|
|
|
$length = fwrite($this->_output, $chunk, $length);
|
|
|
|
$this->_debug('=> wrote ' . $length . ' bytes');
|
|
|
|
$outputBuffer = self::_byteSubstring($outputBuffer, $length);
|
|
}
|
|
|
|
// read error (from GPG)
|
|
if (in_array($fdError, $inputStreams)) {
|
|
$this->_debug('GPG error stream ready for reading');
|
|
$this->_debug(
|
|
'=> about to read ' . self::CHUNK_SIZE .
|
|
' bytes from GPG error'
|
|
);
|
|
|
|
$chunk = fread($fdError, self::CHUNK_SIZE);
|
|
$length = self::_byteLength($chunk);
|
|
$errorBuffer .= $chunk;
|
|
|
|
$this->_debug('=> read ' . $length . ' bytes');
|
|
|
|
// pass lines to error handlers
|
|
while (($pos = strpos($errorBuffer, PHP_EOL)) !== false) {
|
|
$line = self::_byteSubstring($errorBuffer, 0, $pos);
|
|
foreach ($this->_errorHandlers as $handler) {
|
|
array_unshift($handler['args'], $line);
|
|
call_user_func_array(
|
|
$handler['callback'],
|
|
$handler['args']
|
|
);
|
|
|
|
array_shift($handler['args']);
|
|
}
|
|
$errorBuffer = self::_byteSubString(
|
|
$errorBuffer,
|
|
$pos + self::_byteLength(PHP_EOL)
|
|
);
|
|
}
|
|
}
|
|
|
|
// read status (from GPG)
|
|
if (in_array($fdStatus, $inputStreams)) {
|
|
$this->_debug('GPG status stream ready for reading');
|
|
$this->_debug(
|
|
'=> about to read ' . self::CHUNK_SIZE .
|
|
' bytes from GPG status'
|
|
);
|
|
|
|
$chunk = fread($fdStatus, self::CHUNK_SIZE);
|
|
$length = self::_byteLength($chunk);
|
|
$statusBuffer .= $chunk;
|
|
|
|
$this->_debug('=> read ' . $length . ' bytes');
|
|
|
|
// pass lines to status handlers
|
|
while (($pos = strpos($statusBuffer, PHP_EOL)) !== false) {
|
|
$line = self::_byteSubstring($statusBuffer, 0, $pos);
|
|
// only pass lines beginning with magic prefix
|
|
if (self::_byteSubstring($line, 0, 9) == '[GNUPG:] ') {
|
|
$line = self::_byteSubstring($line, 9);
|
|
foreach ($this->_statusHandlers as $handler) {
|
|
array_unshift($handler['args'], $line);
|
|
call_user_func_array(
|
|
$handler['callback'],
|
|
$handler['args']
|
|
);
|
|
|
|
array_shift($handler['args']);
|
|
}
|
|
}
|
|
$statusBuffer = self::_byteSubString(
|
|
$statusBuffer,
|
|
$pos + self::_byteLength(PHP_EOL)
|
|
);
|
|
}
|
|
}
|
|
|
|
// write command (to GPG)
|
|
if (in_array($fdCommand, $outputStreams)) {
|
|
$this->_debug('GPG is ready for command data');
|
|
|
|
// send commands
|
|
$chunk = self::_byteSubstring(
|
|
$this->_commandBuffer,
|
|
0,
|
|
self::CHUNK_SIZE
|
|
);
|
|
|
|
$length = self::_byteLength($chunk);
|
|
|
|
$this->_debug(
|
|
'=> about to write ' . $length . ' bytes to GPG command'
|
|
);
|
|
|
|
$length = fwrite($fdCommand, $chunk, $length);
|
|
|
|
$this->_debug('=> wrote ' . $length);
|
|
|
|
$this->_commandBuffer = self::_byteSubstring(
|
|
$this->_commandBuffer,
|
|
$length
|
|
);
|
|
}
|
|
|
|
} // end loop while streams are open
|
|
|
|
$this->_debug('END PROCESSING');
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _openSubprocess()
|
|
|
|
/**
|
|
* Opens an internal GPG subprocess for the current operation
|
|
*
|
|
* Opens a GPG subprocess, then connects the subprocess to some pipes. Sets
|
|
* the private class property {@link Crypt_GPG_Engine::$_process} to
|
|
* the new subprocess.
|
|
*
|
|
* @return void
|
|
*
|
|
* @throws Crypt_GPG_OpenSubprocessException if the subprocess could not be
|
|
* opened.
|
|
*
|
|
* @see Crypt_GPG_Engine::setOperation()
|
|
* @see Crypt_GPG_Engine::_closeSubprocess()
|
|
* @see Crypt_GPG_Engine::$_process
|
|
*/
|
|
private function _openSubprocess()
|
|
{
|
|
$version = $this->getVersion();
|
|
|
|
$env = $_ENV;
|
|
|
|
// Newer versions of GnuPG return localized results. Crypt_GPG only
|
|
// works with English, so set the locale to 'C' for the subprocess.
|
|
$env['LC_ALL'] = 'C';
|
|
|
|
$commandLine = $this->_binary;
|
|
|
|
$defaultArguments = array(
|
|
'--status-fd ' . escapeshellarg(self::FD_STATUS),
|
|
'--command-fd ' . escapeshellarg(self::FD_COMMAND),
|
|
'--no-secmem-warning',
|
|
'--no-tty',
|
|
'--no-default-keyring', // ignored if keying files are not specified
|
|
'--no-options' // prevent creation of ~/.gnupg directory
|
|
);
|
|
|
|
if (version_compare($version, '1.0.7', 'ge')) {
|
|
if (version_compare($version, '2.0.0', 'lt')) {
|
|
$defaultArguments[] = '--no-use-agent';
|
|
}
|
|
$defaultArguments[] = '--no-permission-warning';
|
|
}
|
|
|
|
if (version_compare($version, '1.4.2', 'ge')) {
|
|
$defaultArguments[] = '--exit-on-status-write-error';
|
|
}
|
|
|
|
if (version_compare($version, '1.3.2', 'ge')) {
|
|
$defaultArguments[] = '--trust-model always';
|
|
} else {
|
|
$defaultArguments[] = '--always-trust';
|
|
}
|
|
|
|
$arguments = array_merge($defaultArguments, $this->_arguments);
|
|
|
|
if ($this->_homedir) {
|
|
$arguments[] = '--homedir ' . escapeshellarg($this->_homedir);
|
|
|
|
// the random seed file makes subsequent actions faster so only
|
|
// disable it if we have to.
|
|
if (!is_writeable($this->_homedir)) {
|
|
$arguments[] = '--no-random-seed-file';
|
|
}
|
|
}
|
|
|
|
if ($this->_publicKeyring) {
|
|
$arguments[] = '--keyring ' . escapeshellarg($this->_publicKeyring);
|
|
}
|
|
|
|
if ($this->_privateKeyring) {
|
|
$arguments[] = '--secret-keyring ' .
|
|
escapeshellarg($this->_privateKeyring);
|
|
}
|
|
|
|
if ($this->_trustDb) {
|
|
$arguments[] = '--trustdb-name ' . escapeshellarg($this->_trustDb);
|
|
}
|
|
|
|
$commandLine .= ' ' . implode(' ', $arguments) . ' ' .
|
|
$this->_operation;
|
|
|
|
// Binary operations will not work on Windows with PHP < 5.2.6. This is
|
|
// in case stream_select() ever works on Windows.
|
|
$rb = (version_compare(PHP_VERSION, '5.2.6') < 0) ? 'r' : 'rb';
|
|
$wb = (version_compare(PHP_VERSION, '5.2.6') < 0) ? 'w' : 'wb';
|
|
|
|
$descriptorSpec = array(
|
|
self::FD_INPUT => array('pipe', $rb), // stdin
|
|
self::FD_OUTPUT => array('pipe', $wb), // stdout
|
|
self::FD_ERROR => array('pipe', $wb), // stderr
|
|
self::FD_STATUS => array('pipe', $wb), // status
|
|
self::FD_COMMAND => array('pipe', $rb), // command
|
|
self::FD_MESSAGE => array('pipe', $rb) // message
|
|
);
|
|
|
|
$this->_debug('OPENING SUBPROCESS WITH THE FOLLOWING COMMAND:');
|
|
$this->_debug($commandLine);
|
|
|
|
$this->_process = proc_open(
|
|
$commandLine,
|
|
$descriptorSpec,
|
|
$this->_pipes,
|
|
null,
|
|
$env,
|
|
array('binary_pipes' => true)
|
|
);
|
|
|
|
if (!is_resource($this->_process)) {
|
|
throw new Crypt_GPG_OpenSubprocessException(
|
|
'Unable to open GPG subprocess.', 0, $commandLine);
|
|
}
|
|
|
|
$this->_openPipes = $this->_pipes;
|
|
$this->_errorCode = Crypt_GPG::ERROR_NONE;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _closeSubprocess()
|
|
|
|
/**
|
|
* Closes a the internal GPG subprocess
|
|
*
|
|
* Closes the internal GPG subprocess. Sets the private class property
|
|
* {@link Crypt_GPG_Engine::$_process} to null.
|
|
*
|
|
* @return void
|
|
*
|
|
* @see Crypt_GPG_Engine::_openSubprocess()
|
|
* @see Crypt_GPG_Engine::$_process
|
|
*/
|
|
private function _closeSubprocess()
|
|
{
|
|
if (is_resource($this->_process)) {
|
|
$this->_debug('CLOSING SUBPROCESS');
|
|
|
|
// close remaining open pipes
|
|
foreach (array_keys($this->_openPipes) as $pipeNumber) {
|
|
$this->_closePipe($pipeNumber);
|
|
}
|
|
|
|
$exitCode = proc_close($this->_process);
|
|
|
|
if ($exitCode != 0) {
|
|
$this->_debug(
|
|
'=> subprocess returned an unexpected exit code: ' .
|
|
$exitCode
|
|
);
|
|
|
|
if ($this->_errorCode === Crypt_GPG::ERROR_NONE) {
|
|
if ($this->_needPassphrase > 0) {
|
|
$this->_errorCode = Crypt_GPG::ERROR_MISSING_PASSPHRASE;
|
|
} else {
|
|
$this->_errorCode = Crypt_GPG::ERROR_UNKNOWN;
|
|
}
|
|
}
|
|
}
|
|
|
|
$this->_process = null;
|
|
$this->_pipes = array();
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _closePipe()
|
|
|
|
/**
|
|
* Closes an opened pipe used to communicate with the GPG subprocess
|
|
*
|
|
* If the pipe is already closed, it is ignored. If the pipe is open, it
|
|
* is flushed and then closed.
|
|
*
|
|
* @param integer $pipeNumber the file descriptor number of the pipe to
|
|
* close.
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _closePipe($pipeNumber)
|
|
{
|
|
$pipeNumber = intval($pipeNumber);
|
|
if (array_key_exists($pipeNumber, $this->_openPipes)) {
|
|
fflush($this->_openPipes[$pipeNumber]);
|
|
fclose($this->_openPipes[$pipeNumber]);
|
|
unset($this->_openPipes[$pipeNumber]);
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _getBinary()
|
|
|
|
/**
|
|
* Gets the name of the GPG binary for the current operating system
|
|
*
|
|
* This method is called if the '<kbd>binary</kbd>' option is <i>not</i>
|
|
* specified when creating this driver.
|
|
*
|
|
* @return string the name of the GPG binary for the current operating
|
|
* system. If no suitable binary could be found, an empty
|
|
* string is returned.
|
|
*/
|
|
private function _getBinary()
|
|
{
|
|
$binary = '';
|
|
|
|
if ($this->_isDarwin) {
|
|
$binaryFiles = array(
|
|
'/opt/local/bin/gpg', // MacPorts
|
|
'/usr/local/bin/gpg', // Mac GPG
|
|
'/sw/bin/gpg', // Fink
|
|
'/usr/bin/gpg'
|
|
);
|
|
} else {
|
|
$binaryFiles = array(
|
|
'/usr/bin/gpg',
|
|
'/usr/local/bin/gpg'
|
|
);
|
|
}
|
|
|
|
foreach ($binaryFiles as $binaryFile) {
|
|
if (is_executable($binaryFile)) {
|
|
$binary = $binaryFile;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $binary;
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _debug()
|
|
|
|
/**
|
|
* Displays debug text if debugging is turned on
|
|
*
|
|
* Debugging text is prepended with a debug identifier and echoed to stdout.
|
|
*
|
|
* @param string $text the debugging text to display.
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _debug($text)
|
|
{
|
|
if ($this->_debug) {
|
|
if (array_key_exists('SHELL', $_ENV)) {
|
|
foreach (explode(PHP_EOL, $text) as $line) {
|
|
echo "Crypt_GPG DEBUG: ", $line, PHP_EOL;
|
|
}
|
|
} else {
|
|
// running on a web server, format debug output nicely
|
|
foreach (explode(PHP_EOL, $text) as $line) {
|
|
echo "Crypt_GPG DEBUG: <strong>", $line,
|
|
'</strong><br />', PHP_EOL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _byteLength()
|
|
|
|
/**
|
|
* Gets the length of a string in bytes even if mbstring function
|
|
* overloading is turned on
|
|
*
|
|
* This is used for stream-based communication with the GPG subprocess.
|
|
*
|
|
* @param string $string the string for which to get the length.
|
|
*
|
|
* @return integer the length of the string in bytes.
|
|
*
|
|
* @see Crypt_GPG_Engine::$_mbStringOverload
|
|
*/
|
|
private static function _byteLength($string)
|
|
{
|
|
if (self::$_mbStringOverload) {
|
|
return mb_strlen($string, '8bit');
|
|
}
|
|
|
|
return strlen((binary)$string);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ _byteSubstring()
|
|
|
|
/**
|
|
* Gets the substring of a string in bytes even if mbstring function
|
|
* overloading is turned on
|
|
*
|
|
* This is used for stream-based communication with the GPG subprocess.
|
|
*
|
|
* @param string $string the input string.
|
|
* @param integer $start the starting point at which to get the substring.
|
|
* @param integer $length optional. The length of the substring.
|
|
*
|
|
* @return string the extracted part of the string. Unlike the default PHP
|
|
* <kbd>substr()</kbd> function, the returned value is
|
|
* always a string and never false.
|
|
*
|
|
* @see Crypt_GPG_Engine::$_mbStringOverload
|
|
*/
|
|
private static function _byteSubstring($string, $start, $length = null)
|
|
{
|
|
if (self::$_mbStringOverload) {
|
|
if ($length === null) {
|
|
return mb_substr(
|
|
$string,
|
|
$start,
|
|
self::_byteLength($string) - $start, '8bit'
|
|
);
|
|
}
|
|
|
|
return mb_substr($string, $start, $length, '8bit');
|
|
}
|
|
|
|
if ($length === null) {
|
|
return (string)substr((binary)$string, $start);
|
|
}
|
|
|
|
return (string)substr((binary)$string, $start, $length);
|
|
}
|
|
|
|
// }}}
|
|
}
|
|
|
|
// }}}
|
|
|
|
?>
|