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510 lines
12 KiB
PHP
510 lines
12 KiB
PHP
<?php
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/*
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* This file is part of SwiftMailer.
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* (c) 2004-2009 Chris Corbyn
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* DomainKey Signer used to apply DomainKeys Signature to a message
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*
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* @package Swift
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* @subpackage Signatures
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* @author Xavier De Cock <xdecock@gmail.com>
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*/
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class Swift_Signers_DomainKeySigner implements Swift_Signers_HeaderSigner
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{
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/**
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* PrivateKey
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*
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* @var string
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*/
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protected $_privateKey;
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/**
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* DomainName
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*
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* @var string
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*/
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protected $_domainName;
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/**
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* Selector
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*
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* @var string
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*/
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protected $_selector;
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/**
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* Hash algorithm used
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*
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* @var string
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*/
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protected $_hashAlgorithm = 'rsa-sha1';
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/**
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* Canonisation method
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*
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* @var string
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*/
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protected $_canon = 'simple';
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/**
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* Headers not being signed
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*
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* @var array
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*/
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protected $_ignoredHeaders = array();
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/**
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* Signer identity
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*
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* @var unknown_type
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*/
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protected $_signerIdentity;
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/**
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* Must we embed signed headers?
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*
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* @var boolean
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*/
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protected $_debugHeaders = false;
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// work variables
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/**
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* Headers used to generate hash
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*
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* @var array
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*/
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private $_signedHeaders = array();
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/**
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* If debugHeaders is set store debugDatas here
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*
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* @var string
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*/
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private $_debugHeadersData = '';
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/**
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* Stores the signature header
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*
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* @var Swift_Mime_Headers_ParameterizedHeader
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*/
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protected $_domainKeyHeader;
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/**
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* Hash Handler
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*
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* @var hash_ressource
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*/
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private $_hashHandler;
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private $_hash;
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private $_canonData = '';
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private $_bodyCanonEmptyCounter = 0;
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private $_bodyCanonIgnoreStart = 2;
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private $_bodyCanonSpace = false;
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private $_bodyCanonLastChar = null;
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private $_bodyCanonLine = '';
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private $_bound = array();
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/**
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* Constructor
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*
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* @param string $privateKey
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* @param string $domainName
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* @param string $selector
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*/
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public function __construct($privateKey, $domainName, $selector)
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{
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$this->_privateKey = $privateKey;
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$this->_domainName = $domainName;
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$this->_signerIdentity = '@' . $domainName;
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$this->_selector = $selector;
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}
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/**
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* Resets internal states
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*
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* @return Swift_Signers_DomainKeysSigner
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*/
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public function reset()
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{
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$this->_hash = null;
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$this->_hashHandler = null;
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$this->_bodyCanonIgnoreStart = 2;
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$this->_bodyCanonEmptyCounter = 0;
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$this->_bodyCanonLastChar = NULL;
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$this->_bodyCanonSpace = false;
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return $this;
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}
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/**
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* Writes $bytes to the end of the stream.
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*
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* Writing may not happen immediately if the stream chooses to buffer. If
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* you want to write these bytes with immediate effect, call {@link commit()}
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* after calling write().
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*
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* This method returns the sequence ID of the write (i.e. 1 for first, 2 for
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* second, etc etc).
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*
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* @param string $bytes
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* @return int
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* @throws Swift_IoException
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* @return Swift_Signers_DomainKeysSigner
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*/
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public function write($bytes)
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{
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$this->_canonicalizeBody($bytes);
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foreach ($this->_bound as $is) {
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$is->write($bytes);
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}
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return $this;
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}
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/**
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* For any bytes that are currently buffered inside the stream, force them
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* off the buffer.
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*
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* @throws Swift_IoException
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* @return Swift_Signers_DomainKeysSigner
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*/
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public function commit()
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{
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// Nothing to do
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return $this;
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}
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/**
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* Attach $is to this stream.
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* The stream acts as an observer, receiving all data that is written.
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* All {@link write()} and {@link flushBuffers()} operations will be mirrored.
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*
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* @param Swift_InputByteStream $is
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* @return Swift_Signers_DomainKeysSigner
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*/
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public function bind(Swift_InputByteStream $is)
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{
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// Don't have to mirror anything
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$this->_bound[] = $is;
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return $this;
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}
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/**
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* Remove an already bound stream.
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* If $is is not bound, no errors will be raised.
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* If the stream currently has any buffered data it will be written to $is
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* before unbinding occurs.
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*
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* @param Swift_InputByteStream $is
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* @return Swift_Signers_DomainKeysSigner
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*/
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public function unbind(Swift_InputByteStream $is)
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{
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// Don't have to mirror anything
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foreach ($this->_bound as $k => $el) {
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if ($el == $is) {
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unset($this->_bound[$k]);
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return;
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}
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}
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return $this;
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}
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/**
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* Flush the contents of the stream (empty it) and set the internal pointer
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* to the beginning.
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*
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* @throws Swift_IoException
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* @return Swift_Signers_DomainKeysSigner
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*/
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public function flushBuffers()
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{
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$this->reset();
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return $this;
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}
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/**
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* Set hash_algorithm, must be one of rsa-sha256 | rsa-sha1 defaults to rsa-sha256
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*
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* @param string $hash
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* @return Swift_Signers_DomainKeysSigner
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*/
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public function setHashAlgorithm($hash)
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{
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$this->_hashAlgorithm = 'rsa-sha1';
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return $this;
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}
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/**
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* Set the canonicalization algorithm
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*
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* @param string $canon simple | nofws defaults to simple
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* @return Swift_Signers_DomainKeysSigner
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*/
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public function setCanon($canon)
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{
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if ($canon == 'nofws') {
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$this->_canon = 'nofws';
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} else {
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$this->_canon = 'simple';
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}
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return $this;
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}
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/**
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* Set the signer identity
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*
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* @param string $identity
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* @return Swift_Signers_DomainKeySigner
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*/
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public function setSignerIdentity($identity)
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{
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$this->_signerIdentity = $identity;
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return $this;
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}
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/**
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* Enable / disable the DebugHeaders
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*
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* @param boolean $debug
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* @return Swift_Signers_DomainKeySigner
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*/
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public function setDebugHeaders($debug)
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{
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$this->_debugHeaders = (bool) $debug;
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return $this;
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}
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/**
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* Start Body
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*
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*/
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public function startBody()
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{
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}
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/**
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* End Body
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*
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*/
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public function endBody()
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{
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$this->_endOfBody();
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}
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/**
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* Returns the list of Headers Tampered by this plugin
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*
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* @return array
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*/
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public function getAlteredHeaders()
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{
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if ($this->_debugHeaders) {
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return array('DomainKey-Signature', 'X-DebugHash');
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} else {
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return array('DomainKey-Signature');
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}
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}
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/**
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* Adds an ignored Header
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*
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* @param string $header_name
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* @return Swift_Signers_DomainKeySigner
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*/
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public function ignoreHeader($header_name)
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{
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$this->_ignoredHeaders[strtolower($header_name)] = true;
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return $this;
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}
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/**
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* Set the headers to sign
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*
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* @param Swift_Mime_HeaderSet $headers
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* @return Swift_Signers_DomainKeySigner
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*/
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public function setHeaders(Swift_Mime_HeaderSet $headers)
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{
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$this->_startHash();
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$this->_canonData = '';
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// Loop through Headers
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$listHeaders = $headers->listAll();
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foreach ($listHeaders as $hName) {
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// Check if we need to ignore Header
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if (! isset($this->_ignoredHeaders[strtolower($hName)])) {
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if ($headers->has($hName)) {
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$tmp = $headers->getAll($hName);
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foreach ($tmp as $header) {
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if ($header->getFieldBody() != '') {
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$this->_addHeader($header->toString());
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$this->_signedHeaders[] = $header->getFieldName();
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}
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}
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}
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}
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}
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$this->_endOfHeaders();
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return $this;
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}
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/**
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* Add the signature to the given Headers
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*
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* @param Swift_Mime_HeaderSet $headers
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* @return Swift_Signers_DomainKeySigner
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*/
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public function addSignature(Swift_Mime_HeaderSet $headers)
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{
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// Prepare the DomainKey-Signature Header
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$params = array('a' => $this->_hashAlgorithm, 'b' => chunk_split(base64_encode($this->_getEncryptedHash()), 73, " "), 'c' => $this->_canon, 'd' => $this->_domainName, 'h' => implode(': ', $this->_signedHeaders), 'q' => 'dns', 's' => $this->_selector);
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$string = '';
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foreach ($params as $k => $v) {
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$string .= $k . '=' . $v . '; ';
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}
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$string = trim($string);
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$headers->addTextHeader('DomainKey-Signature', $string);
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return $this;
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}
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/* Private helpers */
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protected function _addHeader($header)
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{
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switch ($this->_canon) {
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case 'nofws' :
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// Prepare Header and cascade
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$exploded = explode(':', $header, 2);
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$name = strtolower(trim($exploded[0]));
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$value = str_replace("\r\n", "", $exploded[1]);
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$value = preg_replace("/[ \t][ \t]+/", " ", $value);
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$header = $name . ":" . trim($value) . "\r\n";
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case 'simple' :
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// Nothing to do
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}
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$this->_addToHash($header);
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}
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protected function _endOfHeaders()
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{
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$this->_bodyCanonEmptyCounter = 1;
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}
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protected function _canonicalizeBody($string)
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{
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$len = strlen($string);
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$canon = '';
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$nofws = ($this->_canon == "nofws");
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for ($i = 0; $i < $len; ++$i) {
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if ($this->_bodyCanonIgnoreStart > 0) {
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--$this->_bodyCanonIgnoreStart;
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continue;
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}
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switch ($string[$i]) {
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case "\r" :
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$this->_bodyCanonLastChar = "\r";
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break;
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case "\n" :
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if ($this->_bodyCanonLastChar == "\r") {
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if ($nofws) {
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$this->_bodyCanonSpace = false;
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}
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if ($this->_bodyCanonLine == '') {
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++$this->_bodyCanonEmptyCounter;
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} else {
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$this->_bodyCanonLine = '';
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$canon .= "\r\n";
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}
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} else {
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// Wooops Error
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throw new Swift_SwiftException('Invalid new line sequence in mail found \n without preceding \r');
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}
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break;
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case " " :
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case "\t" :
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case "\x09": //HTAB
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if ($nofws) {
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$this->_bodyCanonSpace = true;
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break;
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}
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default :
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if ($this->_bodyCanonEmptyCounter > 0) {
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$canon .= str_repeat("\r\n", $this->_bodyCanonEmptyCounter);
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$this->_bodyCanonEmptyCounter = 0;
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}
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$this->_bodyCanonLine .= $string[$i];
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$canon .= $string[$i];
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}
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}
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$this->_addToHash($canon);
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}
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protected function _endOfBody()
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{
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if (strlen($this->_bodyCanonLine) > 0) {
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$this->_addToHash("\r\n");
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}
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$this->_hash = hash_final($this->_hashHandler, true);
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}
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private function _addToHash($string)
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{
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echo $string;
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$this->_canonData .= $string;
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hash_update($this->_hashHandler, $string);
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}
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private function _startHash()
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{
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// Init
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switch ($this->_hashAlgorithm) {
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case 'rsa-sha1' :
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$this->_hashHandler = hash_init('sha1');
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break;
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}
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$this->_canonLine = '';
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}
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private function _getEncryptedHash()
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{
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$signature = '';
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$sig2 = '';
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openssl_sign($this->_canonData, $sig2, $this->_privateKey, 'sha1');
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var_dump($this->_hash);
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var_dump($this->_privateKey);
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if (openssl_private_encrypt($this->_hash, $signature, $this->_privateKey)) {
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var_dump($this->_canonData, base64_encode($sig2), base64_encode($signature));
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return $sig2;
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return $signature;
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}
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return '';
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}
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}
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