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Add SAML addon.

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very-ape 2021-05-16 20:56:37 -07:00
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xmlseclibs.php
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
05, Sep 2020, 3.1.1
Features:
- Support OAEP (iggyvolz)
Bug Fixes:
- Fix AES128 (iggyvolz)
Improvements:
- Fix tests for older PHP
22, Apr 2020, 3.1.0
Features:
- Support AES-GCM. Requires PHP 7.1. (François Kooman)
Improvements:
- Fix Travis tests for older PHP versions.
- Use DOMElement interface to fix some IDEs reporting documentation errors
Bug Fixes:
- FIX missing InclusiveNamespaces PrefixList from Java + Apache WSS4J. (njake)
06, Nov 2019, 3.0.4
Security Improvements:
- Insure only a single SignedInfo element exists within a signature during
verification. Refs CVE-2019-3465.
Bug Fixes:
- Fix variable casing.
15, Nov 2018, 3.0.3
Bug Fixes:
- Fix casing of class name. (Willem Stuursma-Ruwen)
- Fix Xpath casing. (Tim van Dijen)
Improvements:
- Make PCRE2 compliant. (Stefan Winter)
- Add PHP 7.3 support. (Stefan Winter)
27, Sep 2018, 3.0.2
Security Improvements:
- OpenSSL is now a requirement rather than suggestion. (Slaven Bacelic)
- Filter input to avoid XPath injection. (Jaime Pérez)
Bug Fixes:
- Fix missing parentheses (Tim van Dijen)
Improvements:
- Use strict comparison operator to compare digest values. (Jaime Pérez)
- Remove call to file_get_contents that doesn't even work. (Jaime Pérez)
- Document potentially dangerous return value behaviour. (Thijs Kinkhorst)
31, Aug 2017, 3.0.1
Bug Fixes:
- Fixed missing () in function call. (Dennis Væversted)
Improvements:
- Add OneLogin to supported software.
- Add .gitattributes to remove unneeded files. (Filippo Tessarotto)
- Fix bug in example code. (Dan Church)
- Travis: add PHP 7.1, move hhvm to allowed failures. (Thijs Kinkhorst)
- Drop failing extract-win-cert test (Thijs Kinkhorst). (Thijs Kinkhorst)
- Add comments to warn about return values of verify(). (Thijs Kinkhorst)
- Fix tests to properly check return code of verify(). (Thijs Kinkhorst)
- Restore support for PHP >= 5.4. (Jaime Pérez)
25, May 2017, 3.0.0
Improvements:
- Remove use of mcrypt (skymeyer)
08, Sep 2016, 2.0.1
Bug Fixes:
- Strip whitespace characters when parsing X509Certificate. fixes #84
(klemen.bratec)
- Certificate 'subject' values can be arrays. fixes #80 (Andreas Stangl)
- HHVM signing node with ID attribute w/out namespace regenerates ID value.
fixes #88 (Milos Tomic)
Improvements:
- Fix typos and add some PHPDoc Blocks. (gfaust-qb)
- Update lightSAML link. (Milos Tomic)
- Update copyright dates.
31, Jul 2015, 2.0.0
Features:
- Namespace support. Classes now in the RobRichards\XMLSecLibs\ namespace.
Improvements:
- Dropped support for PHP 5.2
31, Jul 2015, 1.4.1
Bug Fixes:
- Allow for large digest values that may have line breaks. fixes #62
Features:
- Support for locating specific signature when multiple exist in
document. (griga3k)
Improvements:
- Add optional argument to XMLSecurityDSig to define the prefix to be used,
also allowing for null to use no prefix, for the dsig namespace. fixes #13
- Code cleanup
- Depreciated XMLSecurityDSig::generate_GUID for XMLSecurityDSig::generateGUID
23, Jun 2015, 1.4.0
Features:
- Support for PSR-0 standard.
- Support for X509SubjectName. (Milos Tomic)
- Add HMAC-SHA1 support.
Improvements:
- Add how to install to README. (Bernardo Vieira da Silva)
- Code cleanup. (Jaime Pérez)
- Normalilze tests. (Hidde Wieringa)
- Add basic usage to README. (Hidde Wieringa)
21, May 2015, 1.3.2
Bug Fixes:
- Fix Undefined variable notice. (dpieper85)
- Fix typo when setting MimeType attribute. (Eugene OZ)
- Fix validateReference() with enveloping signatures
Features:
- canonicalizeData performance optimization. (Jaime Pérez)
- Add composer support (Maks3w)
19, Jun 2013, 1.3.1
Features:
- return encrypted node from XMLSecEnc::encryptNode() when replace is set to
false. (Olav)
- Add support for RSA SHA384 and RSA_SHA512 and SHA384 digest. (Jaime PŽrez)
- Add options parameter to the add cert methods.
- Add optional issuerSerial creation with cert
Bug Fixes:
- Fix persisted Id when namespaced. (Koen Thomeer)
Improvements:
- Add LICENSE file
- Convert CHANGELOG.txt to UTF-8
26, Sep 2011, 1.3.0
Features:
- Add param to append sig to node when signing. Fixes a problem when using
inclusive canonicalization to append a signature within a namespaced subtree.
ex. $objDSig->sign($objKey, $appendToNode);
- Add ability to encrypt by reference
- Add support for refences within an encrypted key
- Add thumbprint generation capability (XMLSecurityKey->getX509Thumbprint() and
XMLSecurityKey::getRawThumbprint($cert))
- Return signature element node from XMLSecurityDSig::insertSignature() and
XMLSecurityDSig::appendSignature() methods
- Support for <ds:RetrievalMethod> with simple URI Id reference.
- Add XMLSecurityKey::getSymmetricKeySize() method (Olav)
- Add XMLSecEnc::getCipherValue() method (Olav)
- Improve XMLSecurityKey:generateSessionKey() logic (Olav)
Bug Fixes:
- Change split() to explode() as split is now depreciated
- ds:References using empty or simple URI Id reference should never include
comments in canonicalized data.
- Make sure that the elements in EncryptedData are emitted in the correct
sequence.
11 Jan 2010, 1.2.2
Features:
- Add support XPath support when creating signature. Provides support for
working with EBXML documents.
- Add reference option to force creation of URI attribute. For use
when adding a DOM Document where by default no URI attribute is added.
- Add support for RSA-SHA256
Bug Fixes:
- fix bug #5: createDOMDocumentFragment() in decryptNode when data is node
content (patch by Francois Wang)
08 Jul 2008, 1.2.1
Features:
- Attempt to use mhash when hash extension is not present. (Alfredo Cubitos).
- Add fallback to built-in sha1 if both hash and mhash are not available and
throw error for other for other missing hashes. (patch by Olav Morken).
- Add getX509Certificate method to retrieve the x509 cert used for Key.
(patch by Olav Morken).
- Add getValidatedNodes method to retrieve the elements signed by the
signature. (patch by Olav Morken).
- Add insertSignature method for precision signature insertion. Merge
functionality from appendSignature in the process. (Olav Morken, Rob).
- Finally add some tests
Bug Fixes:
- Fix canonicalization for Document node when using PHP < 5.2.
- Add padding for RSA_SHA1. (patch by Olav Morken).
27 Nov 2007, 1.2.0
Features:
- New addReference/List option (overwrite). Boolean flag indicating if URI
value should be overwritten if already existing within document.
Default is TRUE to maintain BC.
18 Nov 2007, 1.1.2
Bug Fixes:
- Remove closing PHP tag to fix extra whitespace characters from being output
11 Nov 2007, 1.1.1
Features:
- Add getRefNodeID() and getRefIDs() methods missed in previous release.
Provide functionality to find URIs of existing reference nodes.
Required by simpleSAMLphp project
Bug Fixes:
- Remove erroneous whitespace causing issues under certain circumastances.
18 Oct 2007, 1.1.0
Features:
- Enable creation of enveloping signature. This allows the creation of
managed information cards.
- Add addObject method for enveloping signatures.
- Add staticGet509XCerts method. Chained certificates within a PEM file can
now be added within the X509Data node.
- Add xpath support within transformations
- Add InclusiveNamespaces prefix list support within exclusive transformations.
Bug Fixes:
- Initialize random number generator for mcrypt_create_iv. (Joan Cornadó).
- Fix an interoperability issue with .NET when encrypting data in CBC mode.
(Joan Cornadó).

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Copyright (c) 2007-2019, Robert Richards <rrichards@cdatazone.org>.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of Robert Richards nor the names of his
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

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#xmlseclibs
xmlseclibs is a library written in PHP for working with XML Encryption and Signatures.
The author of xmlseclibs is Rob Richards.
# Branches
Master is currently the only actively maintained branch.
* master/3.1: Added AES-GCM support requiring 7.1+
* 3.0: Removes mcrypt usage requiring 5.4+ (5.6.24+ recommended for security reasons)
* 2.0: Contains namespace support requiring 5.3+
* 1.4: Contains auto-loader support while also maintaining backwards compatiblity with the older 1.3 version using the xmlseclibs.php file. Supports PHP 5.2+
# Requirements
xmlseclibs requires PHP version 5.4 or greater. **5.6.24+ recommended for security reasons**
## How to Install
Install with [`composer.phar`](http://getcomposer.org).
```sh
php composer.phar require "robrichards/xmlseclibs"
```
## Use cases
xmlseclibs is being used in many different software.
* [SimpleSAMLPHP](https://github.com/simplesamlphp/simplesamlphp)
* [LightSAML](https://github.com/lightsaml/lightsaml)
* [OneLogin](https://github.com/onelogin/php-saml)
## Basic usage
The example below shows basic usage of xmlseclibs, with a SHA-256 signature.
```php
use RobRichards\XMLSecLibs\XMLSecurityDSig;
use RobRichards\XMLSecLibs\XMLSecurityKey;
// Load the XML to be signed
$doc = new DOMDocument();
$doc->load('./path/to/file/tobesigned.xml');
// Create a new Security object
$objDSig = new XMLSecurityDSig();
// Use the c14n exclusive canonicalization
$objDSig->setCanonicalMethod(XMLSecurityDSig::EXC_C14N);
// Sign using SHA-256
$objDSig->addReference(
$doc,
XMLSecurityDSig::SHA256,
array('http://www.w3.org/2000/09/xmldsig#enveloped-signature')
);
// Create a new (private) Security key
$objKey = new XMLSecurityKey(XMLSecurityKey::RSA_SHA256, array('type'=>'private'));
/*
If key has a passphrase, set it using
$objKey->passphrase = '<passphrase>';
*/
// Load the private key
$objKey->loadKey('./path/to/privatekey.pem', TRUE);
// Sign the XML file
$objDSig->sign($objKey);
// Add the associated public key to the signature
$objDSig->add509Cert(file_get_contents('./path/to/file/mycert.pem'));
// Append the signature to the XML
$objDSig->appendSignature($doc->documentElement);
// Save the signed XML
$doc->save('./path/to/signed.xml');
```
## How to Contribute
* [Open Issues](https://github.com/robrichards/xmlseclibs/issues)
* [Open Pull Requests](https://github.com/robrichards/xmlseclibs/pulls)
Mailing List: https://groups.google.com/forum/#!forum/xmlseclibs

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{
"name": "robrichards/xmlseclibs",
"description": "A PHP library for XML Security",
"license": "BSD-3-Clause",
"keywords": [
"xml",
"xmldsig",
"signature",
"security"
],
"homepage": "https://github.com/robrichards/xmlseclibs",
"autoload": {
"psr-4": {
"RobRichards\\XMLSecLibs\\": "src"
}
},
"require": {
"php": ">= 5.4",
"ext-openssl": "*"
}
}

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<?php
namespace RobRichards\XMLSecLibs\Utils;
class XPath
{
const ALPHANUMERIC = '\w\d';
const NUMERIC = '\d';
const LETTERS = '\w';
const EXTENDED_ALPHANUMERIC = '\w\d\s\-_:\.';
const SINGLE_QUOTE = '\'';
const DOUBLE_QUOTE = '"';
const ALL_QUOTES = '[\'"]';
/**
* Filter an attribute value for save inclusion in an XPath query.
*
* @param string $value The value to filter.
* @param string $quotes The quotes used to delimit the value in the XPath query.
*
* @return string The filtered attribute value.
*/
public static function filterAttrValue($value, $quotes = self::ALL_QUOTES)
{
return preg_replace('#'.$quotes.'#', '', $value);
}
/**
* Filter an attribute name for save inclusion in an XPath query.
*
* @param string $name The attribute name to filter.
* @param mixed $allow The set of characters to allow. Can be one of the constants provided by this class, or a
* custom regex excluding the '#' character (used as delimiter).
*
* @return string The filtered attribute name.
*/
public static function filterAttrName($name, $allow = self::EXTENDED_ALPHANUMERIC)
{
return preg_replace('#[^'.$allow.']#', '', $name);
}
}

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<?php
namespace RobRichards\XMLSecLibs;
use DOMDocument;
use DOMElement;
use DOMNode;
use DOMXPath;
use Exception;
use RobRichards\XMLSecLibs\Utils\XPath as XPath;
/**
* xmlseclibs.php
*
* Copyright (c) 2007-2020, Robert Richards <rrichards@cdatazone.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Robert Richards nor the names of his
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @author Robert Richards <rrichards@cdatazone.org>
* @copyright 2007-2020 Robert Richards <rrichards@cdatazone.org>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*/
class XMLSecEnc
{
const template = "<xenc:EncryptedData xmlns:xenc='http://www.w3.org/2001/04/xmlenc#'>
<xenc:CipherData>
<xenc:CipherValue></xenc:CipherValue>
</xenc:CipherData>
</xenc:EncryptedData>";
const Element = 'http://www.w3.org/2001/04/xmlenc#Element';
const Content = 'http://www.w3.org/2001/04/xmlenc#Content';
const URI = 3;
const XMLENCNS = 'http://www.w3.org/2001/04/xmlenc#';
/** @var null|DOMDocument */
private $encdoc = null;
/** @var null|DOMNode */
private $rawNode = null;
/** @var null|string */
public $type = null;
/** @var null|DOMElement */
public $encKey = null;
/** @var array */
private $references = array();
public function __construct()
{
$this->_resetTemplate();
}
private function _resetTemplate()
{
$this->encdoc = new DOMDocument();
$this->encdoc->loadXML(self::template);
}
/**
* @param string $name
* @param DOMNode $node
* @param string $type
* @throws Exception
*/
public function addReference($name, $node, $type)
{
if (! $node instanceOf DOMNode) {
throw new Exception('$node is not of type DOMNode');
}
$curencdoc = $this->encdoc;
$this->_resetTemplate();
$encdoc = $this->encdoc;
$this->encdoc = $curencdoc;
$refuri = XMLSecurityDSig::generateGUID();
$element = $encdoc->documentElement;
$element->setAttribute("Id", $refuri);
$this->references[$name] = array("node" => $node, "type" => $type, "encnode" => $encdoc, "refuri" => $refuri);
}
/**
* @param DOMNode $node
*/
public function setNode($node)
{
$this->rawNode = $node;
}
/**
* Encrypt the selected node with the given key.
*
* @param XMLSecurityKey $objKey The encryption key and algorithm.
* @param bool $replace Whether the encrypted node should be replaced in the original tree. Default is true.
* @throws Exception
*
* @return DOMElement The <xenc:EncryptedData>-element.
*/
public function encryptNode($objKey, $replace = true)
{
$data = '';
if (empty($this->rawNode)) {
throw new Exception('Node to encrypt has not been set');
}
if (! $objKey instanceof XMLSecurityKey) {
throw new Exception('Invalid Key');
}
$doc = $this->rawNode->ownerDocument;
$xPath = new DOMXPath($this->encdoc);
$objList = $xPath->query('/xenc:EncryptedData/xenc:CipherData/xenc:CipherValue');
$cipherValue = $objList->item(0);
if ($cipherValue == null) {
throw new Exception('Error locating CipherValue element within template');
}
switch ($this->type) {
case (self::Element):
$data = $doc->saveXML($this->rawNode);
$this->encdoc->documentElement->setAttribute('Type', self::Element);
break;
case (self::Content):
$children = $this->rawNode->childNodes;
foreach ($children AS $child) {
$data .= $doc->saveXML($child);
}
$this->encdoc->documentElement->setAttribute('Type', self::Content);
break;
default:
throw new Exception('Type is currently not supported');
}
$encMethod = $this->encdoc->documentElement->appendChild($this->encdoc->createElementNS(self::XMLENCNS, 'xenc:EncryptionMethod'));
$encMethod->setAttribute('Algorithm', $objKey->getAlgorithm());
$cipherValue->parentNode->parentNode->insertBefore($encMethod, $cipherValue->parentNode->parentNode->firstChild);
$strEncrypt = base64_encode($objKey->encryptData($data));
$value = $this->encdoc->createTextNode($strEncrypt);
$cipherValue->appendChild($value);
if ($replace) {
switch ($this->type) {
case (self::Element):
if ($this->rawNode->nodeType == XML_DOCUMENT_NODE) {
return $this->encdoc;
}
$importEnc = $this->rawNode->ownerDocument->importNode($this->encdoc->documentElement, true);
$this->rawNode->parentNode->replaceChild($importEnc, $this->rawNode);
return $importEnc;
case (self::Content):
$importEnc = $this->rawNode->ownerDocument->importNode($this->encdoc->documentElement, true);
while ($this->rawNode->firstChild) {
$this->rawNode->removeChild($this->rawNode->firstChild);
}
$this->rawNode->appendChild($importEnc);
return $importEnc;
}
} else {
return $this->encdoc->documentElement;
}
}
/**
* @param XMLSecurityKey $objKey
* @throws Exception
*/
public function encryptReferences($objKey)
{
$curRawNode = $this->rawNode;
$curType = $this->type;
foreach ($this->references AS $name => $reference) {
$this->encdoc = $reference["encnode"];
$this->rawNode = $reference["node"];
$this->type = $reference["type"];
try {
$encNode = $this->encryptNode($objKey);
$this->references[$name]["encnode"] = $encNode;
} catch (Exception $e) {
$this->rawNode = $curRawNode;
$this->type = $curType;
throw $e;
}
}
$this->rawNode = $curRawNode;
$this->type = $curType;
}
/**
* Retrieve the CipherValue text from this encrypted node.
*
* @throws Exception
* @return string|null The Ciphervalue text, or null if no CipherValue is found.
*/
public function getCipherValue()
{
if (empty($this->rawNode)) {
throw new Exception('Node to decrypt has not been set');
}
$doc = $this->rawNode->ownerDocument;
$xPath = new DOMXPath($doc);
$xPath->registerNamespace('xmlencr', self::XMLENCNS);
/* Only handles embedded content right now and not a reference */
$query = "./xmlencr:CipherData/xmlencr:CipherValue";
$nodeset = $xPath->query($query, $this->rawNode);
$node = $nodeset->item(0);
if (!$node) {
return null;
}
return base64_decode($node->nodeValue);
}
/**
* Decrypt this encrypted node.
*
* The behaviour of this function depends on the value of $replace.
* If $replace is false, we will return the decrypted data as a string.
* If $replace is true, we will insert the decrypted element(s) into the
* document, and return the decrypted element(s).
*
* @param XMLSecurityKey $objKey The decryption key that should be used when decrypting the node.
* @param boolean $replace Whether we should replace the encrypted node in the XML document with the decrypted data. The default is true.
*
* @return string|DOMElement The decrypted data.
*/
public function decryptNode($objKey, $replace=true)
{
if (! $objKey instanceof XMLSecurityKey) {
throw new Exception('Invalid Key');
}
$encryptedData = $this->getCipherValue();
if ($encryptedData) {
$decrypted = $objKey->decryptData($encryptedData);
if ($replace) {
switch ($this->type) {
case (self::Element):
$newdoc = new DOMDocument();
$newdoc->loadXML($decrypted);
if ($this->rawNode->nodeType == XML_DOCUMENT_NODE) {
return $newdoc;
}
$importEnc = $this->rawNode->ownerDocument->importNode($newdoc->documentElement, true);
$this->rawNode->parentNode->replaceChild($importEnc, $this->rawNode);
return $importEnc;
case (self::Content):
if ($this->rawNode->nodeType == XML_DOCUMENT_NODE) {
$doc = $this->rawNode;
} else {
$doc = $this->rawNode->ownerDocument;
}
$newFrag = $doc->createDocumentFragment();
$newFrag->appendXML($decrypted);
$parent = $this->rawNode->parentNode;
$parent->replaceChild($newFrag, $this->rawNode);
return $parent;
default:
return $decrypted;
}
} else {
return $decrypted;
}
} else {
throw new Exception("Cannot locate encrypted data");
}
}
/**
* Encrypt the XMLSecurityKey
*
* @param XMLSecurityKey $srcKey
* @param XMLSecurityKey $rawKey
* @param bool $append
* @throws Exception
*/
public function encryptKey($srcKey, $rawKey, $append=true)
{
if ((! $srcKey instanceof XMLSecurityKey) || (! $rawKey instanceof XMLSecurityKey)) {
throw new Exception('Invalid Key');
}
$strEncKey = base64_encode($srcKey->encryptData($rawKey->key));
$root = $this->encdoc->documentElement;
$encKey = $this->encdoc->createElementNS(self::XMLENCNS, 'xenc:EncryptedKey');
if ($append) {
$keyInfo = $root->insertBefore($this->encdoc->createElementNS('http://www.w3.org/2000/09/xmldsig#', 'dsig:KeyInfo'), $root->firstChild);
$keyInfo->appendChild($encKey);
} else {
$this->encKey = $encKey;
}
$encMethod = $encKey->appendChild($this->encdoc->createElementNS(self::XMLENCNS, 'xenc:EncryptionMethod'));
$encMethod->setAttribute('Algorithm', $srcKey->getAlgorith());
if (! empty($srcKey->name)) {
$keyInfo = $encKey->appendChild($this->encdoc->createElementNS('http://www.w3.org/2000/09/xmldsig#', 'dsig:KeyInfo'));
$keyInfo->appendChild($this->encdoc->createElementNS('http://www.w3.org/2000/09/xmldsig#', 'dsig:KeyName', $srcKey->name));
}
$cipherData = $encKey->appendChild($this->encdoc->createElementNS(self::XMLENCNS, 'xenc:CipherData'));
$cipherData->appendChild($this->encdoc->createElementNS(self::XMLENCNS, 'xenc:CipherValue', $strEncKey));
if (is_array($this->references) && count($this->references) > 0) {
$refList = $encKey->appendChild($this->encdoc->createElementNS(self::XMLENCNS, 'xenc:ReferenceList'));
foreach ($this->references AS $name => $reference) {
$refuri = $reference["refuri"];
$dataRef = $refList->appendChild($this->encdoc->createElementNS(self::XMLENCNS, 'xenc:DataReference'));
$dataRef->setAttribute("URI", '#' . $refuri);
}
}
return;
}
/**
* @param XMLSecurityKey $encKey
* @return DOMElement|string
* @throws Exception
*/
public function decryptKey($encKey)
{
if (! $encKey->isEncrypted) {
throw new Exception("Key is not Encrypted");
}
if (empty($encKey->key)) {
throw new Exception("Key is missing data to perform the decryption");
}
return $this->decryptNode($encKey, false);
}
/**
* @param DOMDocument $element
* @return DOMNode|null
*/
public function locateEncryptedData($element)
{
if ($element instanceof DOMDocument) {
$doc = $element;
} else {
$doc = $element->ownerDocument;
}
if ($doc) {
$xpath = new DOMXPath($doc);
$query = "//*[local-name()='EncryptedData' and namespace-uri()='".self::XMLENCNS."']";
$nodeset = $xpath->query($query);
return $nodeset->item(0);
}
return null;
}
/**
* Returns the key from the DOM
* @param null|DOMNode $node
* @return null|XMLSecurityKey
*/
public function locateKey($node=null)
{
if (empty($node)) {
$node = $this->rawNode;
}
if (! $node instanceof DOMNode) {
return null;
}
if ($doc = $node->ownerDocument) {
$xpath = new DOMXPath($doc);
$xpath->registerNamespace('xmlsecenc', self::XMLENCNS);
$query = ".//xmlsecenc:EncryptionMethod";
$nodeset = $xpath->query($query, $node);
if ($encmeth = $nodeset->item(0)) {
$attrAlgorithm = $encmeth->getAttribute("Algorithm");
try {
$objKey = new XMLSecurityKey($attrAlgorithm, array('type' => 'private'));
} catch (Exception $e) {
return null;
}
return $objKey;
}
}
return null;
}
/**
* @param null|XMLSecurityKey $objBaseKey
* @param null|DOMNode $node
* @return null|XMLSecurityKey
* @throws Exception
*/
public static function staticLocateKeyInfo($objBaseKey=null, $node=null)
{
if (empty($node) || (! $node instanceof DOMNode)) {
return null;
}
$doc = $node->ownerDocument;
if (!$doc) {
return null;
}
$xpath = new DOMXPath($doc);
$xpath->registerNamespace('xmlsecenc', self::XMLENCNS);
$xpath->registerNamespace('xmlsecdsig', XMLSecurityDSig::XMLDSIGNS);
$query = "./xmlsecdsig:KeyInfo";
$nodeset = $xpath->query($query, $node);
$encmeth = $nodeset->item(0);
if (!$encmeth) {
/* No KeyInfo in EncryptedData / EncryptedKey. */
return $objBaseKey;
}
foreach ($encmeth->childNodes AS $child) {
switch ($child->localName) {
case 'KeyName':
if (! empty($objBaseKey)) {
$objBaseKey->name = $child->nodeValue;
}
break;
case 'KeyValue':
foreach ($child->childNodes AS $keyval) {
switch ($keyval->localName) {
case 'DSAKeyValue':
throw new Exception("DSAKeyValue currently not supported");
case 'RSAKeyValue':
$modulus = null;
$exponent = null;
if ($modulusNode = $keyval->getElementsByTagName('Modulus')->item(0)) {
$modulus = base64_decode($modulusNode->nodeValue);
}
if ($exponentNode = $keyval->getElementsByTagName('Exponent')->item(0)) {
$exponent = base64_decode($exponentNode->nodeValue);
}
if (empty($modulus) || empty($exponent)) {
throw new Exception("Missing Modulus or Exponent");
}
$publicKey = XMLSecurityKey::convertRSA($modulus, $exponent);
$objBaseKey->loadKey($publicKey);
break;
}
}
break;
case 'RetrievalMethod':
$type = $child->getAttribute('Type');
if ($type !== 'http://www.w3.org/2001/04/xmlenc#EncryptedKey') {
/* Unsupported key type. */
break;
}
$uri = $child->getAttribute('URI');
if ($uri[0] !== '#') {
/* URI not a reference - unsupported. */
break;
}
$id = substr($uri, 1);
$query = '//xmlsecenc:EncryptedKey[@Id="'.XPath::filterAttrValue($id, XPath::DOUBLE_QUOTE).'"]';
$keyElement = $xpath->query($query)->item(0);
if (!$keyElement) {
throw new Exception("Unable to locate EncryptedKey with @Id='$id'.");
}
return XMLSecurityKey::fromEncryptedKeyElement($keyElement);
case 'EncryptedKey':
return XMLSecurityKey::fromEncryptedKeyElement($child);
case 'X509Data':
if ($x509certNodes = $child->getElementsByTagName('X509Certificate')) {
if ($x509certNodes->length > 0) {
$x509cert = $x509certNodes->item(0)->textContent;
$x509cert = str_replace(array("\r", "\n", " "), "", $x509cert);
$x509cert = "-----BEGIN CERTIFICATE-----\n".chunk_split($x509cert, 64, "\n")."-----END CERTIFICATE-----\n";
$objBaseKey->loadKey($x509cert, false, true);
}
}
break;
}
}
return $objBaseKey;
}
/**
* @param null|XMLSecurityKey $objBaseKey
* @param null|DOMNode $node
* @return null|XMLSecurityKey
*/
public function locateKeyInfo($objBaseKey=null, $node=null)
{
if (empty($node)) {
$node = $this->rawNode;
}
return self::staticLocateKeyInfo($objBaseKey, $node);
}
}

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<?php
namespace RobRichards\XMLSecLibs;
use DOMElement;
use Exception;
/**
* xmlseclibs.php
*
* Copyright (c) 2007-2020, Robert Richards <rrichards@cdatazone.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Robert Richards nor the names of his
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @author Robert Richards <rrichards@cdatazone.org>
* @copyright 2007-2020 Robert Richards <rrichards@cdatazone.org>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*/
class XMLSecurityKey
{
const TRIPLEDES_CBC = 'http://www.w3.org/2001/04/xmlenc#tripledes-cbc';
const AES128_CBC = 'http://www.w3.org/2001/04/xmlenc#aes128-cbc';
const AES192_CBC = 'http://www.w3.org/2001/04/xmlenc#aes192-cbc';
const AES256_CBC = 'http://www.w3.org/2001/04/xmlenc#aes256-cbc';
const AES128_GCM = 'http://www.w3.org/2009/xmlenc11#aes128-gcm';
const AES192_GCM = 'http://www.w3.org/2009/xmlenc11#aes192-gcm';
const AES256_GCM = 'http://www.w3.org/2009/xmlenc11#aes256-gcm';
const RSA_1_5 = 'http://www.w3.org/2001/04/xmlenc#rsa-1_5';
const RSA_OAEP_MGF1P = 'http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p';
const RSA_OAEP = 'http://www.w3.org/2009/xmlenc11#rsa-oaep';
const DSA_SHA1 = 'http://www.w3.org/2000/09/xmldsig#dsa-sha1';
const RSA_SHA1 = 'http://www.w3.org/2000/09/xmldsig#rsa-sha1';
const RSA_SHA256 = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha256';
const RSA_SHA384 = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha384';
const RSA_SHA512 = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha512';
const HMAC_SHA1 = 'http://www.w3.org/2000/09/xmldsig#hmac-sha1';
const AUTHTAG_LENGTH = 16;
/** @var array */
private $cryptParams = array();
/** @var int|string */
public $type = 0;
/** @var mixed|null */
public $key = null;
/** @var string */
public $passphrase = "";
/** @var string|null */
public $iv = null;
/** @var string|null */
public $name = null;
/** @var mixed|null */
public $keyChain = null;
/** @var bool */
public $isEncrypted = false;
/** @var XMLSecEnc|null */
public $encryptedCtx = null;
/** @var mixed|null */
public $guid = null;
/**
* This variable contains the certificate as a string if this key represents an X509-certificate.
* If this key doesn't represent a certificate, this will be null.
* @var string|null
*/
private $x509Certificate = null;
/**
* This variable contains the certificate thumbprint if we have loaded an X509-certificate.
* @var string|null
*/
private $X509Thumbprint = null;
/**
* @param string $type
* @param null|array $params
* @throws Exception
*/
public function __construct($type, $params=null)
{
switch ($type) {
case (self::TRIPLEDES_CBC):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['cipher'] = 'des-ede3-cbc';
$this->cryptParams['type'] = 'symmetric';
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#tripledes-cbc';
$this->cryptParams['keysize'] = 24;
$this->cryptParams['blocksize'] = 8;
break;
case (self::AES128_CBC):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['cipher'] = 'aes-128-cbc';
$this->cryptParams['type'] = 'symmetric';
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#aes128-cbc';
$this->cryptParams['keysize'] = 16;
$this->cryptParams['blocksize'] = 16;
break;
case (self::AES192_CBC):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['cipher'] = 'aes-192-cbc';
$this->cryptParams['type'] = 'symmetric';
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#aes192-cbc';
$this->cryptParams['keysize'] = 24;
$this->cryptParams['blocksize'] = 16;
break;
case (self::AES256_CBC):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['cipher'] = 'aes-256-cbc';
$this->cryptParams['type'] = 'symmetric';
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#aes256-cbc';
$this->cryptParams['keysize'] = 32;
$this->cryptParams['blocksize'] = 16;
break;
case (self::AES128_GCM):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['cipher'] = 'aes-128-gcm';
$this->cryptParams['type'] = 'symmetric';
$this->cryptParams['method'] = 'http://www.w3.org/2009/xmlenc11#aes128-gcm';
$this->cryptParams['keysize'] = 16;
$this->cryptParams['blocksize'] = 16;
break;
case (self::AES192_GCM):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['cipher'] = 'aes-192-gcm';
$this->cryptParams['type'] = 'symmetric';
$this->cryptParams['method'] = 'http://www.w3.org/2009/xmlenc11#aes192-gcm';
$this->cryptParams['keysize'] = 24;
$this->cryptParams['blocksize'] = 16;
break;
case (self::AES256_GCM):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['cipher'] = 'aes-256-gcm';
$this->cryptParams['type'] = 'symmetric';
$this->cryptParams['method'] = 'http://www.w3.org/2009/xmlenc11#aes256-gcm';
$this->cryptParams['keysize'] = 32;
$this->cryptParams['blocksize'] = 16;
break;
case (self::RSA_1_5):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['padding'] = OPENSSL_PKCS1_PADDING;
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#rsa-1_5';
if (is_array($params) && ! empty($params['type'])) {
if ($params['type'] == 'public' || $params['type'] == 'private') {
$this->cryptParams['type'] = $params['type'];
break;
}
}
throw new Exception('Certificate "type" (private/public) must be passed via parameters');
case (self::RSA_OAEP_MGF1P):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['padding'] = OPENSSL_PKCS1_OAEP_PADDING;
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p';
$this->cryptParams['hash'] = null;
if (is_array($params) && ! empty($params['type'])) {
if ($params['type'] == 'public' || $params['type'] == 'private') {
$this->cryptParams['type'] = $params['type'];
break;
}
}
throw new Exception('Certificate "type" (private/public) must be passed via parameters');
case (self::RSA_OAEP):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['padding'] = OPENSSL_PKCS1_OAEP_PADDING;
$this->cryptParams['method'] = 'http://www.w3.org/2009/xmlenc11#rsa-oaep';
$this->cryptParams['hash'] = 'http://www.w3.org/2009/xmlenc11#mgf1sha1';
if (is_array($params) && ! empty($params['type'])) {
if ($params['type'] == 'public' || $params['type'] == 'private') {
$this->cryptParams['type'] = $params['type'];
break;
}
}
throw new Exception('Certificate "type" (private/public) must be passed via parameters');
case (self::RSA_SHA1):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['method'] = 'http://www.w3.org/2000/09/xmldsig#rsa-sha1';
$this->cryptParams['padding'] = OPENSSL_PKCS1_PADDING;
if (is_array($params) && ! empty($params['type'])) {
if ($params['type'] == 'public' || $params['type'] == 'private') {
$this->cryptParams['type'] = $params['type'];
break;
}
}
throw new Exception('Certificate "type" (private/public) must be passed via parameters');
case (self::RSA_SHA256):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha256';
$this->cryptParams['padding'] = OPENSSL_PKCS1_PADDING;
$this->cryptParams['digest'] = 'SHA256';
if (is_array($params) && ! empty($params['type'])) {
if ($params['type'] == 'public' || $params['type'] == 'private') {
$this->cryptParams['type'] = $params['type'];
break;
}
}
throw new Exception('Certificate "type" (private/public) must be passed via parameters');
case (self::RSA_SHA384):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha384';
$this->cryptParams['padding'] = OPENSSL_PKCS1_PADDING;
$this->cryptParams['digest'] = 'SHA384';
if (is_array($params) && ! empty($params['type'])) {
if ($params['type'] == 'public' || $params['type'] == 'private') {
$this->cryptParams['type'] = $params['type'];
break;
}
}
throw new Exception('Certificate "type" (private/public) must be passed via parameters');
case (self::RSA_SHA512):
$this->cryptParams['library'] = 'openssl';
$this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmldsig-more#rsa-sha512';
$this->cryptParams['padding'] = OPENSSL_PKCS1_PADDING;
$this->cryptParams['digest'] = 'SHA512';
if (is_array($params) && ! empty($params['type'])) {
if ($params['type'] == 'public' || $params['type'] == 'private') {
$this->cryptParams['type'] = $params['type'];
break;
}
}
throw new Exception('Certificate "type" (private/public) must be passed via parameters');
case (self::HMAC_SHA1):
$this->cryptParams['library'] = $type;
$this->cryptParams['method'] = 'http://www.w3.org/2000/09/xmldsig#hmac-sha1';
break;
default:
throw new Exception('Invalid Key Type');
}
$this->type = $type;
}
/**
* Retrieve the key size for the symmetric encryption algorithm..
*
* If the key size is unknown, or this isn't a symmetric encryption algorithm,
* null is returned.
*
* @return int|null The number of bytes in the key.
*/
public function getSymmetricKeySize()
{
if (! isset($this->cryptParams['keysize'])) {
return null;
}
return $this->cryptParams['keysize'];
}
/**
* Generates a session key using the openssl-extension.
* In case of using DES3-CBC the key is checked for a proper parity bits set.
* @return string
* @throws Exception
*/
public function generateSessionKey()
{
if (!isset($this->cryptParams['keysize'])) {
throw new Exception('Unknown key size for type "' . $this->type . '".');
}
$keysize = $this->cryptParams['keysize'];
$key = openssl_random_pseudo_bytes($keysize);
if ($this->type === self::TRIPLEDES_CBC) {
/* Make sure that the generated key has the proper parity bits set.
* Mcrypt doesn't care about the parity bits, but others may care.
*/
for ($i = 0; $i < strlen($key); $i++) {
$byte = ord($key[$i]) & 0xfe;
$parity = 1;
for ($j = 1; $j < 8; $j++) {
$parity ^= ($byte >> $j) & 1;
}
$byte |= $parity;
$key[$i] = chr($byte);
}
}
$this->key = $key;
return $key;
}
/**
* Get the raw thumbprint of a certificate
*
* @param string $cert
* @return null|string
*/
public static function getRawThumbprint($cert)
{
$arCert = explode("\n", $cert);
$data = '';
$inData = false;
foreach ($arCert AS $curData) {
if (! $inData) {
if (strncmp($curData, '-----BEGIN CERTIFICATE', 22) == 0) {
$inData = true;
}
} else {
if (strncmp($curData, '-----END CERTIFICATE', 20) == 0) {
break;
}
$data .= trim($curData);
}
}
if (! empty($data)) {
return strtolower(sha1(base64_decode($data)));
}
return null;
}
/**
* Loads the given key, or - with isFile set true - the key from the keyfile.
*
* @param string $key
* @param bool $isFile
* @param bool $isCert
* @throws Exception
*/
public function loadKey($key, $isFile=false, $isCert = false)
{
if ($isFile) {
$this->key = file_get_contents($key);
} else {
$this->key = $key;
}
if ($isCert) {
$this->key = openssl_x509_read($this->key);
openssl_x509_export($this->key, $str_cert);
$this->x509Certificate = $str_cert;
$this->key = $str_cert;
} else {
$this->x509Certificate = null;
}
if ($this->cryptParams['library'] == 'openssl') {
switch ($this->cryptParams['type']) {
case 'public':
if ($isCert) {
/* Load the thumbprint if this is an X509 certificate. */
$this->X509Thumbprint = self::getRawThumbprint($this->key);
}
$this->key = openssl_get_publickey($this->key);
if (! $this->key) {
throw new Exception('Unable to extract public key');
}
break;
case 'private':
$this->key = openssl_get_privatekey($this->key, $this->passphrase);
break;
case'symmetric':
if (strlen($this->key) < $this->cryptParams['keysize']) {
throw new Exception('Key must contain at least '.$this->cryptParams['keysize'].' characters for this cipher, contains '.strlen($this->key));
}
break;
default:
throw new Exception('Unknown type');
}
}
}
/**
* ISO 10126 Padding
*
* @param string $data
* @param integer $blockSize
* @throws Exception
* @return string
*/
private function padISO10126($data, $blockSize)
{
if ($blockSize > 256) {
throw new Exception('Block size higher than 256 not allowed');
}
$padChr = $blockSize - (strlen($data) % $blockSize);
$pattern = chr($padChr);
return $data . str_repeat($pattern, $padChr);
}
/**
* Remove ISO 10126 Padding
*
* @param string $data
* @return string
*/
private function unpadISO10126($data)
{
$padChr = substr($data, -1);
$padLen = ord($padChr);
return substr($data, 0, -$padLen);
}
/**
* Encrypts the given data (string) using the openssl-extension
*
* @param string $data
* @return string
*/
private function encryptSymmetric($data)
{
$this->iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length($this->cryptParams['cipher']));
$authTag = null;
if(in_array($this->cryptParams['cipher'], ['aes-128-gcm', 'aes-192-gcm', 'aes-256-gcm'])) {
if (version_compare(PHP_VERSION, '7.1.0') < 0) {
throw new Exception('PHP 7.1.0 is required to use AES GCM algorithms');
}
$authTag = openssl_random_pseudo_bytes(self::AUTHTAG_LENGTH);
$encrypted = openssl_encrypt($data, $this->cryptParams['cipher'], $this->key, OPENSSL_RAW_DATA, $this->iv, $authTag);
} else {
$data = $this->padISO10126($data, $this->cryptParams['blocksize']);
$encrypted = openssl_encrypt($data, $this->cryptParams['cipher'], $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $this->iv);
}
if (false === $encrypted) {
throw new Exception('Failure encrypting Data (openssl symmetric) - ' . openssl_error_string());
}
return $this->iv . $encrypted . $authTag;
}
/**
* Decrypts the given data (string) using the openssl-extension
*
* @param string $data
* @return string
*/
private function decryptSymmetric($data)
{
$iv_length = openssl_cipher_iv_length($this->cryptParams['cipher']);
$this->iv = substr($data, 0, $iv_length);
$data = substr($data, $iv_length);
$authTag = null;
if(in_array($this->cryptParams['cipher'], ['aes-128-gcm', 'aes-192-gcm', 'aes-256-gcm'])) {
if (version_compare(PHP_VERSION, '7.1.0') < 0) {
throw new Exception('PHP 7.1.0 is required to use AES GCM algorithms');
}
// obtain and remove the authentication tag
$offset = 0 - self::AUTHTAG_LENGTH;
$authTag = substr($data, $offset);
$data = substr($data, 0, $offset);
$decrypted = openssl_decrypt($data, $this->cryptParams['cipher'], $this->key, OPENSSL_RAW_DATA, $this->iv, $authTag);
} else {
$decrypted = openssl_decrypt($data, $this->cryptParams['cipher'], $this->key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $this->iv);
}
if (false === $decrypted) {
throw new Exception('Failure decrypting Data (openssl symmetric) - ' . openssl_error_string());
}
return null !== $authTag ? $decrypted : $this->unpadISO10126($decrypted);
}
/**
* Encrypts the given public data (string) using the openssl-extension
*
* @param string $data
* @return string
* @throws Exception
*/
private function encryptPublic($data)
{
if (! openssl_public_encrypt($data, $encrypted, $this->key, $this->cryptParams['padding'])) {
throw new Exception('Failure encrypting Data (openssl public) - ' . openssl_error_string());
}
return $encrypted;
}
/**
* Decrypts the given public data (string) using the openssl-extension
*
* @param string $data
* @return string
* @throws Exception
*/
private function decryptPublic($data)
{
if (! openssl_public_decrypt($data, $decrypted, $this->key, $this->cryptParams['padding'])) {
throw new Exception('Failure decrypting Data (openssl public) - ' . openssl_error_string());
}
return $decrypted;
}
/**
* Encrypts the given private data (string) using the openssl-extension
*
* @param string $data
* @return string
* @throws Exception
*/
private function encryptPrivate($data)
{
if (! openssl_private_encrypt($data, $encrypted, $this->key, $this->cryptParams['padding'])) {
throw new Exception('Failure encrypting Data (openssl private) - ' . openssl_error_string());
}
return $encrypted;
}
/**
* Decrypts the given private data (string) using the openssl-extension
*
* @param string $data
* @return string
* @throws Exception
*/
private function decryptPrivate($data)
{
if (! openssl_private_decrypt($data, $decrypted, $this->key, $this->cryptParams['padding'])) {
throw new Exception('Failure decrypting Data (openssl private) - ' . openssl_error_string());
}
return $decrypted;
}
/**
* Signs the given data (string) using the openssl-extension
*
* @param string $data
* @return string
* @throws Exception
*/
private function signOpenSSL($data)
{
$algo = OPENSSL_ALGO_SHA1;
if (! empty($this->cryptParams['digest'])) {
$algo = $this->cryptParams['digest'];
}
if (! openssl_sign($data, $signature, $this->key, $algo)) {
throw new Exception('Failure Signing Data: ' . openssl_error_string() . ' - ' . $algo);
}
return $signature;
}
/**
* Verifies the given data (string) belonging to the given signature using the openssl-extension
*
* Returns:
* 1 on succesful signature verification,
* 0 when signature verification failed,
* -1 if an error occurred during processing.
*
* NOTE: be very careful when checking the return value, because in PHP,
* -1 will be cast to True when in boolean context. So always check the
* return value in a strictly typed way, e.g. "$obj->verify(...) === 1".
*
* @param string $data
* @param string $signature
* @return int
*/
private function verifyOpenSSL($data, $signature)
{
$algo = OPENSSL_ALGO_SHA1;
if (! empty($this->cryptParams['digest'])) {
$algo = $this->cryptParams['digest'];
}
return openssl_verify($data, $signature, $this->key, $algo);
}
/**
* Encrypts the given data (string) using the regarding php-extension, depending on the library assigned to algorithm in the contructor.
*
* @param string $data
* @return mixed|string
*/
public function encryptData($data)
{
if ($this->cryptParams['library'] === 'openssl') {
switch ($this->cryptParams['type']) {
case 'symmetric':
return $this->encryptSymmetric($data);
case 'public':
return $this->encryptPublic($data);
case 'private':
return $this->encryptPrivate($data);
}
}
}
/**
* Decrypts the given data (string) using the regarding php-extension, depending on the library assigned to algorithm in the contructor.
*
* @param string $data
* @return mixed|string
*/
public function decryptData($data)
{
if ($this->cryptParams['library'] === 'openssl') {
switch ($this->cryptParams['type']) {
case 'symmetric':
return $this->decryptSymmetric($data);
case 'public':
return $this->decryptPublic($data);
case 'private':
return $this->decryptPrivate($data);
}
}
}
/**
* Signs the data (string) using the extension assigned to the type in the constructor.
*
* @param string $data
* @return mixed|string
*/
public function signData($data)
{
switch ($this->cryptParams['library']) {
case 'openssl':
return $this->signOpenSSL($data);
case (self::HMAC_SHA1):
return hash_hmac("sha1", $data, $this->key, true);
}
}
/**
* Verifies the data (string) against the given signature using the extension assigned to the type in the constructor.
*
* Returns in case of openSSL:
* 1 on succesful signature verification,
* 0 when signature verification failed,
* -1 if an error occurred during processing.
*
* NOTE: be very careful when checking the return value, because in PHP,
* -1 will be cast to True when in boolean context. So always check the
* return value in a strictly typed way, e.g. "$obj->verify(...) === 1".
*
* @param string $data
* @param string $signature
* @return bool|int
*/
public function verifySignature($data, $signature)
{
switch ($this->cryptParams['library']) {
case 'openssl':
return $this->verifyOpenSSL($data, $signature);
case (self::HMAC_SHA1):
$expectedSignature = hash_hmac("sha1", $data, $this->key, true);
return strcmp($signature, $expectedSignature) == 0;
}
}
/**
* @deprecated
* @see getAlgorithm()
* @return mixed
*/
public function getAlgorith()
{
return $this->getAlgorithm();
}
/**
* @return mixed
*/
public function getAlgorithm()
{
return $this->cryptParams['method'];
}
/**
*
* @param int $type
* @param string $string
* @return null|string
*/
public static function makeAsnSegment($type, $string)
{
switch ($type) {
case 0x02:
if (ord($string) > 0x7f)
$string = chr(0).$string;
break;
case 0x03:
$string = chr(0).$string;
break;
}
$length = strlen($string);
if ($length < 128) {
$output = sprintf("%c%c%s", $type, $length, $string);
} else if ($length < 0x0100) {
$output = sprintf("%c%c%c%s", $type, 0x81, $length, $string);
} else if ($length < 0x010000) {
$output = sprintf("%c%c%c%c%s", $type, 0x82, $length / 0x0100, $length % 0x0100, $string);
} else {
$output = null;
}
return $output;
}
/**
*
* Hint: Modulus and Exponent must already be base64 decoded
* @param string $modulus
* @param string $exponent
* @return string
*/
public static function convertRSA($modulus, $exponent)
{
/* make an ASN publicKeyInfo */
$exponentEncoding = self::makeAsnSegment(0x02, $exponent);
$modulusEncoding = self::makeAsnSegment(0x02, $modulus);
$sequenceEncoding = self::makeAsnSegment(0x30, $modulusEncoding.$exponentEncoding);
$bitstringEncoding = self::makeAsnSegment(0x03, $sequenceEncoding);
$rsaAlgorithmIdentifier = pack("H*", "300D06092A864886F70D0101010500");
$publicKeyInfo = self::makeAsnSegment(0x30, $rsaAlgorithmIdentifier.$bitstringEncoding);
/* encode the publicKeyInfo in base64 and add PEM brackets */
$publicKeyInfoBase64 = base64_encode($publicKeyInfo);
$encoding = "-----BEGIN PUBLIC KEY-----\n";
$offset = 0;
while ($segment = substr($publicKeyInfoBase64, $offset, 64)) {
$encoding = $encoding.$segment."\n";
$offset += 64;
}
return $encoding."-----END PUBLIC KEY-----\n";
}
/**
* @param mixed $parent
*/
public function serializeKey($parent)
{
}
/**
* Retrieve the X509 certificate this key represents.
*
* Will return the X509 certificate in PEM-format if this key represents
* an X509 certificate.
*
* @return string The X509 certificate or null if this key doesn't represent an X509-certificate.
*/
public function getX509Certificate()
{
return $this->x509Certificate;
}
/**
* Get the thumbprint of this X509 certificate.
*
* Returns:
* The thumbprint as a lowercase 40-character hexadecimal number, or null
* if this isn't a X509 certificate.
*
* @return string Lowercase 40-character hexadecimal number of thumbprint
*/
public function getX509Thumbprint()
{
return $this->X509Thumbprint;
}
/**
* Create key from an EncryptedKey-element.
*
* @param DOMElement $element The EncryptedKey-element.
* @throws Exception
*
* @return XMLSecurityKey The new key.
*/
public static function fromEncryptedKeyElement(DOMElement $element)
{
$objenc = new XMLSecEnc();
$objenc->setNode($element);
if (! $objKey = $objenc->locateKey()) {
throw new Exception("Unable to locate algorithm for this Encrypted Key");
}
$objKey->isEncrypted = true;
$objKey->encryptedCtx = $objenc;
XMLSecEnc::staticLocateKeyInfo($objKey, $element);
return $objKey;
}
}

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<?php
/**
* xmlseclibs.php
*
* Copyright (c) 2007-2020, Robert Richards <rrichards@cdatazone.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Robert Richards nor the names of his
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @author Robert Richards <rrichards@cdatazone.org>
* @copyright 2007-2020 Robert Richards <rrichards@cdatazone.org>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version 3.1.1
*/
$xmlseclibs_srcdir = dirname(__FILE__) . '/src/';
require $xmlseclibs_srcdir . '/XMLSecurityKey.php';
require $xmlseclibs_srcdir . '/XMLSecurityDSig.php';
require $xmlseclibs_srcdir . '/XMLSecEnc.php';
require $xmlseclibs_srcdir . '/Utils/XPath.php';