/modules/Users/authentication/SAMLAuthenticate/lib/xmlseclibs/xmlseclibs.php
PHP | 1516 lines | 1282 code | 125 blank | 109 comment | 272 complexity | 8b832c004e559e701915bb57b661dda7 MD5 | raw file
Possible License(s): LGPL-2.1, MPL-2.0-no-copyleft-exception, BSD-3-Clause
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- <?php
- /**
- * xmlseclibs.php
- *
- * Copyright (c) 2007, 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 Robert Richards <rrichards@cdatazone.org>
- * @license http://www.opensource.org/licenses/bsd-license.php BSD License
- * @version 1.2.2
- */
- /*
- Functions to generate simple cases of Exclusive Canonical XML - Callable function is C14NGeneral()
- i.e.: $canonical = C14NGeneral($domelement, TRUE);
- */
- /* helper function */
- function sortAndAddAttrs($element, $arAtts) {
- $newAtts = array();
- foreach ($arAtts AS $attnode) {
- $newAtts[$attnode->nodeName] = $attnode;
- }
- ksort($newAtts);
- foreach ($newAtts as $attnode) {
- $element->setAttribute($attnode->nodeName, $attnode->nodeValue);
- }
- }
- /* helper function */
- function canonical($tree, $element, $withcomments) {
- if ($tree->nodeType != XML_DOCUMENT_NODE) {
- $dom = $tree->ownerDocument;
- } else {
- $dom = $tree;
- }
- if ($element->nodeType != XML_ELEMENT_NODE) {
- if ($element->nodeType == XML_DOCUMENT_NODE) {
- foreach ($element->childNodes AS $node) {
- canonical($dom, $node, $withcomments);
- }
- return;
- }
- if ($element->nodeType == XML_COMMENT_NODE && ! $withcomments) {
- return;
- }
- $tree->appendChild($dom->importNode($element, TRUE));
- return;
- }
- $arNS = array();
- if ($element->namespaceURI != "") {
- if ($element->prefix == "") {
- $elCopy = $dom->createElementNS($element->namespaceURI, $element->nodeName);
- } else {
- $prefix = $tree->lookupPrefix($element->namespaceURI);
- if ($prefix == $element->prefix) {
- $elCopy = $dom->createElementNS($element->namespaceURI, $element->nodeName);
- } else {
- $elCopy = $dom->createElement($element->nodeName);
- $arNS[$element->namespaceURI] = $element->prefix;
- }
- }
- } else {
- $elCopy = $dom->createElement($element->nodeName);
- }
- $tree->appendChild($elCopy);
- /* Create DOMXPath based on original document */
- $xPath = new DOMXPath($element->ownerDocument);
- /* Get namespaced attributes */
- $arAtts = $xPath->query('attribute::*[namespace-uri(.) != ""]', $element);
- /* Create an array with namespace URIs as keys, and sort them */
- foreach ($arAtts AS $attnode) {
- if (array_key_exists($attnode->namespaceURI, $arNS) &&
- ($arNS[$attnode->namespaceURI] == $attnode->prefix)) {
- continue;
- }
- $prefix = $tree->lookupPrefix($attnode->namespaceURI);
- if ($prefix != $attnode->prefix) {
- $arNS[$attnode->namespaceURI] = $attnode->prefix;
- } else {
- $arNS[$attnode->namespaceURI] = NULL;
- }
- }
- if (count($arNS) > 0) {
- asort($arNS);
- }
- /* Add namespace nodes */
- foreach ($arNS AS $namespaceURI=>$prefix) {
- if ($prefix != NULL) {
- $elCopy->setAttributeNS("http://www.w3.org/2000/xmlns/",
- "xmlns:".$prefix, $namespaceURI);
- }
- }
- if (count($arNS) > 0) {
- ksort($arNS);
- }
- /* Get attributes not in a namespace, and then sort and add them */
- $arAtts = $xPath->query('attribute::*[namespace-uri(.) = ""]', $element);
- sortAndAddAttrs($elCopy, $arAtts);
- /* Loop through the URIs, and then sort and add attributes within that namespace */
- foreach ($arNS as $nsURI=>$prefix) {
- $arAtts = $xPath->query('attribute::*[namespace-uri(.) = "'.$nsURI.'"]', $element);
- sortAndAddAttrs($elCopy, $arAtts);
- }
- foreach ($element->childNodes AS $node) {
- canonical($elCopy, $node, $withcomments);
- }
- }
- /*
- $element - DOMElement for which to produce the canonical version of
- $exclusive - boolean to indicate exclusive canonicalization (must pass TRUE)
- $withcomments - boolean indicating wether or not to include comments in canonicalized form
- */
- function C14NGeneral($element, $exclusive=FALSE, $withcomments=FALSE) {
- /* IF PHP 5.2+ then use built in canonical functionality */
- $php_version = explode('.', PHP_VERSION);
- if (($php_version[0] > 5) || ($php_version[0] == 5 && $php_version[1] >= 2) ) {
- return $element->C14N($exclusive, $withcomments);
- }
- /* Must be element or document */
- if (! $element instanceof DOMElement && ! $element instanceof DOMDocument) {
- return NULL;
- }
- /* Currently only exclusive XML is supported */
- if ($exclusive == FALSE) {
- throw new Exception("Only exclusive canonicalization is supported in this version of PHP");
- }
- $copyDoc = new DOMDocument();
- canonical($copyDoc, $element, $withcomments);
- return $copyDoc->saveXML($copyDoc->documentElement, LIBXML_NOEMPTYTAG);
- }
- 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 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 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';
- private $cryptParams = array();
- public $type = 0;
- public $key = NULL;
- public $passphrase = "";
- public $iv = NULL;
- public $name = NULL;
- public $keyChain = NULL;
- public $isEncrypted = FALSE;
- public $encryptedCtx = 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.
- */
- private $x509Certificate = NULL;
- public function __construct($type, $params=NULL) {
- srand();
- switch ($type) {
- case (XMLSecurityKey::TRIPLEDES_CBC):
- $this->cryptParams['library'] = 'mcrypt';
- $this->cryptParams['cipher'] = MCRYPT_TRIPLEDES;
- $this->cryptParams['mode'] = MCRYPT_MODE_CBC;
- $this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#tripledes-cbc';
- break;
- case (XMLSecurityKey::AES128_CBC):
- $this->cryptParams['library'] = 'mcrypt';
- $this->cryptParams['cipher'] = MCRYPT_RIJNDAEL_128;
- $this->cryptParams['mode'] = MCRYPT_MODE_CBC;
- $this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#aes128-cbc';
- break;
- case (XMLSecurityKey::AES192_CBC):
- $this->cryptParams['library'] = 'mcrypt';
- $this->cryptParams['cipher'] = MCRYPT_RIJNDAEL_128;
- $this->cryptParams['mode'] = MCRYPT_MODE_CBC;
- $this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#aes192-cbc';
- break;
- case (XMLSecurityKey::AES256_CBC):
- $this->cryptParams['library'] = 'mcrypt';
- $this->cryptParams['cipher'] = MCRYPT_RIJNDAEL_128;
- $this->cryptParams['mode'] = MCRYPT_MODE_CBC;
- $this->cryptParams['method'] = 'http://www.w3.org/2001/04/xmlenc#aes256-cbc';
- break;
- case (XMLSecurityKey::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');
- return;
- case (XMLSecurityKey::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');
- return;
- case (XMLSecurityKey::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');
- break;
- case (XMLSecurityKey::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');
- break;
- default:
- throw new Exception('Invalid Key Type');
- return;
- }
- $this->type = $type;
- }
- public function generateSessionKey() {
- $key = '';
- if (! empty($this->cryptParams['cipher']) && ! empty($this->cryptParams['mode'])) {
- $keysize = mcrypt_module_get_algo_key_size($this->cryptParams['cipher']);
- /* Generating random key using iv generation routines */
- if (($keysize > 0) && ($td = mcrypt_module_open(MCRYPT_RIJNDAEL_256, '',$this->cryptParams['mode'], ''))) {
- if ($this->cryptParams['cipher'] == MCRYPT_RIJNDAEL_128) {
- $keysize = 16;
- if ($this->type == XMLSecurityKey::AES256_CBC) {
- $keysize = 32;
- } elseif ($this->type == XMLSecurityKey::AES192_CBC) {
- $keysize = 24;
- }
- }
- while (strlen($key) < $keysize) {
- $key .= mcrypt_create_iv(mcrypt_enc_get_iv_size ($td),MCRYPT_RAND);
- }
- mcrypt_module_close($td);
- $key = substr($key, 0, $keysize);
- $this->key = $key;
- }
- }
- return $key;
- }
- public function loadKey($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') {
- if ($this->cryptParams['type'] == 'public') {
- // Disable this part due to openssl bug on some systems
- // that think public key is private key. Certificate
- // should still serve as key for verification purposes
- // By smalyshev 1 May 2012
- // $this->key = openssl_get_publickey($this->key);
- } else {
- $this->key = openssl_get_privatekey($this->key, $this->passphrase);
- }
- } else if ($this->cryptParams['cipher'] == MCRYPT_RIJNDAEL_128) {
- /* Check key length */
- switch ($this->type) {
- case (XMLSecurityKey::AES256_CBC):
- if (strlen($this->key) < 25) {
- throw new Exception('Key must contain at least 25 characters for this cipher');
- }
- break;
- case (XMLSecurityKey::AES192_CBC):
- if (strlen($this->key) < 17) {
- throw new Exception('Key must contain at least 17 characters for this cipher');
- }
- break;
- }
- }
- }
- private function encryptMcrypt($data) {
- $td = mcrypt_module_open($this->cryptParams['cipher'], '', $this->cryptParams['mode'], '');
- $this->iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
- mcrypt_generic_init($td, $this->key, $this->iv);
- if ($this->cryptParams['mode'] == MCRYPT_MODE_CBC) {
- $bs = mcrypt_enc_get_block_size($td);
- for ($datalen0=$datalen=strlen($data); (($datalen%$bs)!=($bs-1)); $datalen++)
- $data.=chr(rand(1, 127));
- $data.=chr($datalen-$datalen0+1);
- }
- $encrypted_data = $this->iv.mcrypt_generic($td, $data);
- mcrypt_generic_deinit($td);
- mcrypt_module_close($td);
- return $encrypted_data;
- }
- private function decryptMcrypt($data) {
- $td = mcrypt_module_open($this->cryptParams['cipher'], '', $this->cryptParams['mode'], '');
- $iv_length = mcrypt_enc_get_iv_size($td);
- $this->iv = substr($data, 0, $iv_length);
- $data = substr($data, $iv_length);
- mcrypt_generic_init($td, $this->key, $this->iv);
- $decrypted_data = mdecrypt_generic($td, $data);
- mcrypt_generic_deinit($td);
- mcrypt_module_close($td);
- if ($this->cryptParams['mode'] == MCRYPT_MODE_CBC) {
- $dataLen = strlen($decrypted_data);
- $paddingLength = substr($decrypted_data, $dataLen - 1, 1);
- $decrypted_data = substr($decrypted_data, 0, $dataLen - ord($paddingLength));
- }
- return $decrypted_data;
- }
- private function encryptOpenSSL($data) {
- if ($this->cryptParams['type'] == 'public') {
- if (! openssl_public_encrypt($data, $encrypted_data, $this->key, $this->cryptParams['padding'])) {
- throw new Exception('Failure encrypting Data');
- return;
- }
- } else {
- if (! openssl_private_encrypt($data, $encrypted_data, $this->key, $this->cryptParams['padding'])) {
- throw new Exception('Failure encrypting Data');
- return;
- }
- }
- return $encrypted_data;
- }
- private function decryptOpenSSL($data) {
- if ($this->cryptParams['type'] == 'public') {
- if (! openssl_public_decrypt($data, $decrypted, $this->key, $this->cryptParams['padding'])) {
- throw new Exception('Failure decrypting Data');
- return;
- }
- } else {
- if (! openssl_private_decrypt($data, $decrypted, $this->key, $this->cryptParams['padding'])) {
- throw new Exception('Failure decrypting Data');
- return;
- }
- }
- return $decrypted;
- }
- private function signOpenSSL($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;
- }
- return $signature;
- }
- private function verifyOpenSSL($data, $signature) {
- $algo = OPENSSL_ALGO_SHA1;
- if (! empty($this->cryptParams['digest'])) {
- $algo = $this->cryptParams['digest'];
- }
- return openssl_verify ($data, $signature, $this->key, $algo);
- }
- public function encryptData($data) {
- switch ($this->cryptParams['library']) {
- case 'mcrypt':
- return $this->encryptMcrypt($data);
- break;
- case 'openssl':
- return $this->encryptOpenSSL($data);
- break;
- }
- }
- public function decryptData($data) {
- switch ($this->cryptParams['library']) {
- case 'mcrypt':
- return $this->decryptMcrypt($data);
- break;
- case 'openssl':
- return $this->decryptOpenSSL($data);
- break;
- }
- }
- public function signData($data) {
- switch ($this->cryptParams['library']) {
- case 'openssl':
- return $this->signOpenSSL($data);
- break;
- }
- }
- public function verifySignature($data, $signature) {
- switch ($this->cryptParams['library']) {
- case 'openssl':
- return $this->verifyOpenSSL($data, $signature);
- break;
- }
- }
- public function getAlgorith() {
- return $this->cryptParams['method'];
- }
- static function makeAsnSegment($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);
- }
- /* Modulus and Exponent must already be base64 decoded */
- static function convertRSA($modulus, $exponent) {
- /* make an ASN publicKeyInfo */
- $exponentEncoding = XMLSecurityKey::makeAsnSegment(0x02, $exponent);
- $modulusEncoding = XMLSecurityKey::makeAsnSegment(0x02, $modulus);
- $sequenceEncoding = XMLSecurityKey:: makeAsnSegment(0x30, $modulusEncoding.$exponentEncoding);
- $bitstringEncoding = XMLSecurityKey::makeAsnSegment(0x03, $sequenceEncoding);
- $rsaAlgorithmIdentifier = pack("H*", "300D06092A864886F70D0101010500");
- $publicKeyInfo = XMLSecurityKey::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 $encoding."-----END PUBLIC KEY-----\n";
- }
- public function serializeKey($parent) {
- }
- /**
- * Retrieve the X509 certificate this key represents.
- *
- * Will return the X509 certificate in PEM-format if this key represents
- * an X509 certificate.
- *
- * @return The X509 certificate or NULL if this key doesn't represent an X509-certificate.
- */
- public function getX509Certificate() {
- return $this->x509Certificate;
- }
- }
- class XMLSecurityDSig {
- const XMLDSIGNS = 'http://www.w3.org/2000/09/xmldsig#';
- const SHA1 = 'http://www.w3.org/2000/09/xmldsig#sha1';
- const SHA256 = 'http://www.w3.org/2001/04/xmlenc#sha256';
- const SHA512 = 'http://www.w3.org/2001/04/xmlenc#sha512';
- const RIPEMD160 = 'http://www.w3.org/2001/04/xmlenc#ripemd160';
- const C14N = 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315';
- const C14N_COMMENTS = 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments';
- const EXC_C14N = 'http://www.w3.org/2001/10/xml-exc-c14n#';
- const EXC_C14N_COMMENTS = 'http://www.w3.org/2001/10/xml-exc-c14n#WithComments';
- const template = '<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
- <ds:SignedInfo>
- <ds:SignatureMethod />
- </ds:SignedInfo>
- </ds:Signature>';
- public $sigNode = NULL;
- public $idKeys = array();
- public $idNS = array();
- private $signedInfo = NULL;
- private $xPathCtx = NULL;
- private $canonicalMethod = NULL;
- private $prefix = 'ds';
- private $searchpfx = 'secdsig';
- /* This variable contains an associative array of validated nodes. */
- private $validatedNodes = NULL;
- public function __construct() {
- $sigdoc = new DOMDocument();
- $sigdoc->loadXML(XMLSecurityDSig::template);
- $this->sigNode = $sigdoc->documentElement;
- }
- private function getXPathObj() {
- if (empty($this->xPathCtx) && ! empty($this->sigNode)) {
- $xpath = new DOMXPath($this->sigNode->ownerDocument);
- $xpath->registerNamespace('secdsig', XMLSecurityDSig::XMLDSIGNS);
- $this->xPathCtx = $xpath;
- }
- return $this->xPathCtx;
- }
- static function generate_GUID($prefix='pfx') {
- $uuid = md5(uniqid(rand(), true));
- $guid = $prefix.substr($uuid,0,8)."-".
- substr($uuid,8,4)."-".
- substr($uuid,12,4)."-".
- substr($uuid,16,4)."-".
- substr($uuid,20,12);
- return $guid;
- }
- public function locateSignature($objDoc) {
- if ($objDoc instanceof DOMDocument) {
- $doc = $objDoc;
- } else {
- $doc = $objDoc->ownerDocument;
- }
- if ($doc) {
- $xpath = new DOMXPath($doc);
- $xpath->registerNamespace('secdsig', XMLSecurityDSig::XMLDSIGNS);
- $query = ".//secdsig:Signature";
- $nodeset = $xpath->query($query, $objDoc);
- $this->sigNode = $nodeset->item(0);
- return $this->sigNode;
- }
- return NULL;
- }
- public function createNewSignNode($name, $value=NULL) {
- $doc = $this->sigNode->ownerDocument;
- if (! is_null($value)) {
- $node = $doc->createElementNS(XMLSecurityDSig::XMLDSIGNS, $this->prefix.':'.$name, $value);
- } else {
- $node = $doc->createElementNS(XMLSecurityDSig::XMLDSIGNS, $this->prefix.':'.$name);
- }
- return $node;
- }
- public function setCanonicalMethod($method) {
- switch ($method) {
- case 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315':
- case 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments':
- case 'http://www.w3.org/2001/10/xml-exc-c14n#':
- case 'http://www.w3.org/2001/10/xml-exc-c14n#WithComments':
- $this->canonicalMethod = $method;
- break;
- default:
- throw new Exception('Invalid Canonical Method');
- }
- if ($xpath = $this->getXPathObj()) {
- $query = './'.$this->searchpfx.':SignedInfo';
- $nodeset = $xpath->query($query, $this->sigNode);
- if ($sinfo = $nodeset->item(0)) {
- $query = './'.$this->searchpfx.'CanonicalizationMethod';
- $nodeset = $xpath->query($query, $sinfo);
- if (! ($canonNode = $nodeset->item(0))) {
- $canonNode = $this->createNewSignNode('CanonicalizationMethod');
- $sinfo->insertBefore($canonNode, $sinfo->firstChild);
- }
- $canonNode->setAttribute('Algorithm', $this->canonicalMethod);
- }
- }
- }
- private function canonicalizeData($node, $canonicalmethod, $arXPath=NULL, $prefixList=NULL) {
- $exclusive = FALSE;
- $withComments = FALSE;
- switch ($canonicalmethod) {
- case 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315':
- $exclusive = FALSE;
- $withComments = FALSE;
- break;
- case 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments':
- $withComments = TRUE;
- break;
- case 'http://www.w3.org/2001/10/xml-exc-c14n#':
- $exclusive = TRUE;
- break;
- case 'http://www.w3.org/2001/10/xml-exc-c14n#WithComments':
- $exclusive = TRUE;
- $withComments = TRUE;
- break;
- }
- /* Support PHP versions < 5.2 not containing C14N methods in DOM extension */
- $php_version = explode('.', PHP_VERSION);
- if (($php_version[0] < 5) || ($php_version[0] == 5 && $php_version[1] < 2) ) {
- if (! is_null($arXPath)) {
- throw new Exception("PHP 5.2.0 or higher is required to perform XPath Transformations");
- }
- return C14NGeneral($node, $exclusive, $withComments);
- }
- return $node->C14N($exclusive, $withComments, $arXPath, $prefixList);
- }
- public function canonicalizeSignedInfo() {
- $doc = $this->sigNode->ownerDocument;
- $canonicalmethod = NULL;
- if ($doc) {
- $xpath = $this->getXPathObj();
- $query = "./secdsig:SignedInfo";
- $nodeset = $xpath->query($query, $this->sigNode);
- if ($signInfoNode = $nodeset->item(0)) {
- $query = "./secdsig:CanonicalizationMethod";
- $nodeset = $xpath->query($query, $signInfoNode);
- if ($canonNode = $nodeset->item(0)) {
- $canonicalmethod = $canonNode->getAttribute('Algorithm');
- }
- $this->signedInfo = $this->canonicalizeData($signInfoNode, $canonicalmethod);
- return $this->signedInfo;
- }
- }
- return NULL;
- }
- public function calculateDigest ($digestAlgorithm, $data) {
- switch ($digestAlgorithm) {
- case XMLSecurityDSig::SHA1:
- $alg = 'sha1';
- break;
- case XMLSecurityDSig::SHA256:
- $alg = 'sha256';
- break;
- case XMLSecurityDSig::SHA512:
- $alg = 'sha512';
- break;
- case XMLSecurityDSig::RIPEMD160:
- $alg = 'ripemd160';
- break;
- default:
- throw new Exception("Cannot validate digest: Unsupported Algorith <$digestAlgorithm>");
- }
- if (function_exists('hash')) {
- return base64_encode(hash($alg, $data, TRUE));
- } elseif (function_exists('mhash')) {
- $alg = "MHASH_" . strtoupper($alg);
- return base64_encode(mhash(constant($alg), $data));
- } elseif ($alg === 'sha1') {
- return base64_encode(sha1($data, TRUE));
- } else {
- throw new Exception('xmlseclibs is unable to calculate a digest. Maybe you need the mhash library?');
- }
- }
- public function validateDigest($refNode, $data) {
- $xpath = new DOMXPath($refNode->ownerDocument);
- $xpath->registerNamespace('secdsig', XMLSecurityDSig::XMLDSIGNS);
- $query = 'string(./secdsig:DigestMethod/@Algorithm)';
- $digestAlgorithm = $xpath->evaluate($query, $refNode);
- $digValue = $this->calculateDigest($digestAlgorithm, $data);
- $query = 'string(./secdsig:DigestValue)';
- $digestValue = $xpath->evaluate($query, $refNode);
- return ($digValue == $digestValue);
- }
- public function processTransforms($refNode, $objData) {
- $data = $objData;
- $xpath = new DOMXPath($refNode->ownerDocument);
- $xpath->registerNamespace('secdsig', XMLSecurityDSig::XMLDSIGNS);
- $query = './secdsig:Transforms/secdsig:Transform';
- $nodelist = $xpath->query($query, $refNode);
- $canonicalMethod = 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315';
- $arXPath = NULL;
- $prefixList = NULL;
- foreach ($nodelist AS $transform) {
- $algorithm = $transform->getAttribute("Algorithm");
- switch ($algorithm) {
- case 'http://www.w3.org/2001/10/xml-exc-c14n#':
- case 'http://www.w3.org/2001/10/xml-exc-c14n#WithComments':
- $node = $transform->firstChild;
- while ($node) {
- if ($node->localName == 'InclusiveNamespaces') {
- if ($pfx = $node->getAttribute('PrefixList')) {
- $arpfx = array();
- $pfxlist = preg_split("/\s/", $pfx);
- foreach ($pfxlist AS $pfx) {
- $val = trim($pfx);
- if (! empty($val)) {
- $arpfx[] = $val;
- }
- }
- if (count($arpfx) > 0) {
- $prefixList = $arpfx;
- }
- }
- break;
- }
- $node = $node->nextSibling;
- }
- case 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315':
- case 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments':
- $canonicalMethod = $algorithm;
- break;
- case 'http://www.w3.org/TR/1999/REC-xpath-19991116':
- $node = $transform->firstChild;
- while ($node) {
- if ($node->localName == 'XPath') {
- $arXPath = array();
- $arXPath['query'] = '(.//. | .//@* | .//namespace::*)['.$node->nodeValue.']';
- $arXpath['namespaces'] = array();
- $nslist = $xpath->query('./namespace::*', $node);
- foreach ($nslist AS $nsnode) {
- if ($nsnode->localName != "xml") {
- $arXPath['namespaces'][$nsnode->localName] = $nsnode->nodeValue;
- }
- }
- break;
- }
- $node = $node->nextSibling;
- }
- break;
- }
- }
- if ($data instanceof DOMNode) {
- $data = $this->canonicalizeData($objData, $canonicalMethod, $arXPath, $prefixList);
- }
- return $data;
- }
- public function processRefNode($refNode) {
- $dataObject = NULL;
- if ($uri = $refNode->getAttribute("URI")) {
- $arUrl = parse_url($uri);
- if (empty($arUrl['path'])) {
- if ($identifier = $arUrl['fragment']) {
- $xPath = new DOMXPath($refNode->ownerDocument);
- if ($this->idNS && is_array($this->idNS)) {
- foreach ($this->idNS AS $nspf=>$ns) {
- $xPath->registerNamespace($nspf, $ns);
- }
- }
- $iDlist = '@Id="'.$identifier.'"';
- if (is_array($this->idKeys)) {
- foreach ($this->idKeys AS $idKey) {
- $iDlist .= " or @$idKey='$identifier'";
- }
- }
- $query = '//*['.$iDlist.']';
- $dataObject = $xPath->query($query)->item(0);
- } else {
- $dataObject = $refNode->ownerDocument;
- }
- } else {
- $dataObject = file_get_contents($arUrl);
- }
- } else {
- $dataObject = $refNode->ownerDocument;
- }
- $data = $this->processTransforms($refNode, $dataObject);
- if (!$this->validateDigest($refNode, $data)) {
- return FALSE;
- }
- if ($dataObject instanceof DOMNode) {
- /* Add this node to the list of validated nodes. */
- if(! empty($identifier)) {
- $this->validatedNodes[$identifier] = $dataObject;
- } else {
- $this->validatedNodes[] = $dataObject;
- }
- }
- return TRUE;
- }
- public function getRefNodeID($refNode) {
- if ($uri = $refNode->getAttribute("URI")) {
- $arUrl = parse_url($uri);
- if (empty($arUrl['path'])) {
- if ($identifier = $arUrl['fragment']) {
- return $identifier;
- }
- }
- }
- return null;
- }
- public function getRefIDs() {
- $refids = array();
- $doc = $this->sigNode->ownerDocument;
- $xpath = $this->getXPathObj();
- $query = "./secdsig:SignedInfo/secdsig:Reference";
- $nodeset = $xpath->query($query, $this->sigNode);
- if ($nodeset->length == 0) {
- throw new Exception("Reference nodes not found");
- }
- foreach ($nodeset AS $refNode) {
- $refids[] = $this->getRefNodeID($refNode);
- }
- return $refids;
- }
- public function validateReference() {
- $doc = $this->sigNode->ownerDocument;
- if (! $doc->isSameNode($this->sigNode)) {
- $this->sigNode->parentNode->removeChild($this->sigNode);
- }
- $xpath = $this->getXPathObj();
- $query = "./secdsig:SignedInfo/secdsig:Reference";
- $nodeset = $xpath->query($query, $this->sigNode);
- if ($nodeset->length == 0) {
- throw new Exception("Reference nodes not found");
- }
- /* Initialize/reset the list of validated nodes. */
- $this->validatedNodes = array();
- foreach ($nodeset AS $refNode) {
- if (! $this->processRefNode($refNode)) {
- /* Clear the list of validated nodes. */
- $this->validatedNodes = NULL;
- throw new Exception("Reference validation failed");
- }
- }
- return TRUE;
- }
- private function addRefInternal($sinfoNode, $node, $algorithm, $arTransforms=NULL, $options=NULL) {
- $prefix = NULL;
- $prefix_ns = NULL;
- $id_name = 'Id';
- $overwrite_id = TRUE;
- $force_uri = FALSE;
- if (is_array($options)) {
- $prefix = empty($options['prefix'])?NULL:$options['prefix'];
- $prefix_ns = empty($options['prefix_ns'])?NULL:$options['prefix_ns'];
- $id_name = empty($options['id_name'])?'Id':$options['id_name'];
- $overwrite_id = !isset($options['overwrite'])?TRUE:(bool)$options['overwrite'];
- $force_uri = !isset($options['force_uri'])?FALSE:(bool)$options['force_uri'];
- }
- $attname = $id_name;
- if (! empty($prefix)) {
- $attname = $prefix.':'.$attname;
- }
- $refNode = $this->createNewSignNode('Reference');
- $sinfoNode->appendChild($refNode);
- if (! $node instanceof DOMDocument) {
- $uri = NULL;
- if (! $overwrite_id) {
- $uri = $node->getAttributeNS($prefix_ns, $attname);
- }
- if (empty($uri)) {
- $uri = XMLSecurityDSig::generate_GUID();
- $node->setAttributeNS($prefix_ns, $attname, $uri);
- }
- $refNode->setAttribute("URI", '#'.$uri);
- } elseif ($force_uri) {
- $refNode->setAttribute("URI", '');
- }
- $transNodes = $this->createNewSignNode('Transforms');
- $refNode->appendChild($transNodes);
- if (is_array($arTransforms)) {
- foreach ($arTransforms AS $transform) {
- $transNode = $this->createNewSignNode('Transform');
- $transNodes->appendChild($transNode);
- if (is_array($transform) &&
- (! empty($transform['http://www.w3.org/TR/1999/REC-xpath-19991116'])) &&
- (! empty($transform['http://www.w3.org/TR/1999/REC-xpath-19991116']['query']))) {
- $transNode->setAttribute('Algorithm', 'http://www.w3.org/TR/1999/REC-xpath-19991116');
- $XPathNode = $this->createNewSignNode('XPath', $transform['http://www.w3.org/TR/1999/REC-xpath-19991116']['query']);
- $transNode->appendChild($XPathNode);
- if (! empty($transform['http://www.w3.org/TR/1999/REC-xpath-19991116']['namespaces'])) {
- foreach ($transform['http://www.w3.org/TR/1999/REC-xpath-19991116']['namespaces'] AS $prefix => $namespace) {
- $XPathNode->setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:$prefix", $namespace);
- }
- }
- } else {
- $transNode->setAttribute('Algorithm', $transform);
- }
- }
- } elseif (! empty($this->canonicalMethod)) {
- $transNode = $this->createNewSignNode('Transform');
- $transNodes->appendChild($transNode);
- $transNode->setAttribute('Algorithm', $this->canonicalMethod);
- }
- $canonicalData = $this->processTransforms($refNode, $node);
- $digValue = $this->calculateDigest($algorithm, $canonicalData);
- $digestMethod = $this->createNewSignNode('DigestMethod');
- $refNode->appendChild($digestMethod);
- $digestMethod->setAttribute('Algorithm', $algorithm);
- $digestValue = $this->createNewSignNode('DigestValue', $digValue);
- $refNode->appendChild($digestValue);
- }
- public function addReference($node, $algorithm, $arTransforms=NULL, $options=NULL) {
- if ($xpath = $this->getXPathObj()) {
- $query = "./secdsig:SignedInfo";
- $nodeset = $xpath->query($query, $this->sigNode);
- if ($sInfo = $nodeset->item(0)) {
- $this->addRefInternal($sInfo, $node, $algorithm, $arTransforms, $options);
- }
- }
- }
- public function addReferenceList($arNodes, $algorithm, $arTransforms=NULL, $options=NULL) {
- if ($xpath = $this->getXPathObj()) {
- $query = "./secdsig:SignedInfo";
- $nodeset = $xpath->query($query, $this->sigNode);
- if ($sInfo = $nodeset->item(0)) {
- foreach ($arNodes AS $node) {
- $this->addRefInternal($sInfo, $node, $algorithm, $arTransforms, $options);
- }
- }
- }
- }
- public function addObject($data, $mimetype=NULL, $encoding=NULL) {
- $objNode = $this->createNewSignNode('Object');
- $this->sigNode->appendChild($objNode);
- if (! empty($mimetype)) {
- $objNode->setAtribute('MimeType', $mimetype);
- }
- if (! empty($encoding)) {
- $objNode->setAttribute('Encoding', $encoding);
- }
- if ($data instanceof DOMElement) {
- $newData = $this->sigNode->ownerDocument->importNode($data, TRUE);
- } else {
- $newData = $this->sigNode->ownerDocument->createTextNode($data);
- }
- $objNode->appendChild($newData);
- return $objNode;
- }
- public function locateKey($node=NULL) {
- if (empty($node)) {
- $node = $this->sigNode;
- }
- if (! $node instanceof DOMNode) {
- return NULL;
- }
- if ($doc = $node->ownerDocument) {
- $xpath = new DOMXPath($doc);
- $xpath->registerNamespace('secdsig', XMLSecurityDSig::XMLDSIGNS);
- $query = "string(./secdsig:SignedInfo/secdsig:SignatureMethod/@Algorithm)";
- $algorithm = $xpath->evaluate($query, $node);
- if ($algorithm) {
- try {
- $objKey = new XMLSecurityKey($algorithm, array('type'=>'public'));
- } catch (Exception $e) {
- return NULL;
- }
- return $objKey;
- }
- }
- return NULL;
- }
- public function verify($objKey) {
- $doc = $this->sigNode->ownerDocument;
- $xpath = new DOMXPath($doc);
- $xpath->registerNamespace('secdsig', XMLSecurityDSig::XMLDSIGNS);
- $query = "string(./secdsig:SignatureValue)";
- $sigValue = $xpath->evaluate($query, $this->sigNode);
- if (empty($sigValue)) {
- throw new Exception("Unable to locate SignatureValue");
- }
- return $objKey->verifySignature($this->signedInfo, base64_decode($sigValue));
- }
- public function signData($objKey, $data) {
- return $objKey->signData($data);
- }
- public function sign($objKey) {
- if ($xpath = $this->getXPathObj()) {
- $query = "./secdsig:SignedInfo";
- $nodeset = $xpath->query($query, $this->sigNode);
- if ($sInfo = $nodeset->item(0)) {
- $query = "./secdsig:SignatureMethod";
- $nodeset = $xpath->query($query, $sInfo);
- $sMethod = $nodeset->item(0);
- $sMethod->setAttribute('Algorithm', $objKey->type);
- $data = $this->canonicalizeData($sInfo, $this->canonicalMethod);
- $sigValue = base64_encode($this->signData($objKey, $data));
- $sigValueNode = $this->createNewSignNode('SignatureValue', $sigValue);
- if ($infoSibling = $sInfo->nextSibling) {
- $infoSibling->parentNode->insertBefore($sigValueNode, $infoSibling);
- } else {
- $this->sigNode->appendChild($sigValueNode);
- }
- }
- }
- }
- public function appendCert() {
- }
- public function appendKey($objKey, $parent=NULL) {
- $objKey->serializeKey($parent);
- }
- /**
- * This function inserts the signature element.
- *
- * The signature element will be appended to the element, unless $beforeNode is specified. If $beforeNode
- * is specified, the signature element will be inserted as the last element before $beforeNode.
- *
- * @param $node The node the signature element should be inserted into.
- * @param $beforeNode The node the signature element should be located before.
- */
- public function insertSignature($node, $beforeNode = NULL) {
- $document = $node->ownerDocument;
- $signatureElement = $document->importNode($this->sigNode, TRUE);
- if($beforeNode == NULL) {
- $node->insertBefore($signatureElement);
- } else {
- $node->insertBefore($signatureElement, $beforeNode);
- }
- }
- public function appendSignature($parentNode, $insertBefore = FALSE) {
- $beforeNode = $insertBefore ? $parentNode->firstChild : NULL;
- $this->insertSignature($parentNode, $beforeNode);
- }
- static function get509XCert($cert, $isPEMFormat=TRUE) {
- $certs = XMLSecurityDSig::staticGet509XCerts($cert, $isPEMFormat);
- if (! empty($certs)) {
- return $certs[0];
- }
- return '';
- }
- static function staticGet509XCerts($certs, $isPEMFormat=TRUE) {
- if ($isPEMFormat) {
- $data = '';
- $certlist = array();
- $arCert = explode("\n", $certs);
- $inData = FALSE;
- foreach ($arCert AS $curData) {
- if (! $inData) {
- if (strncmp($curData, '-----BEGIN CERTIFICATE', 22) == 0) {
- $inData = TRUE;
- }
- } else {
- if (strncmp($curData, '-----END CERTIFICATE', 20) == 0) {
- $inData = FALSE;
- $certlist[] = $data;
- $data = '';
- continue;
- }
- $data .= trim($curData);
- }
- }
- return $certlist;
- } else {
- return array($certs);
- }
- }
- static function staticAdd509Cert($parentRef, $cert, $isPEMFormat=TRUE, $isURL=False, $xpath=NULL) {
- if ($isURL) {
- $cert = file_get_contents($cert);
- }
- if (! $parentRef instanceof DOMElement) {
- throw new Exception('Invalid parent Node parameter');
- }
- $baseDoc = $parentRef->ownerDocument;
- if (empty($xpath)) {
- $xpath = new DOMXPath($parentRef->ownerDocument);
- $xpath->registerNamespace('secdsig', XMLSecurityDSig::XMLDSIGNS);
- }
- $query = "./secdsig:KeyInfo";
- $nodeset = $xpath->query($query, $parentRef);
- $keyInfo = $nodeset->item(0);
- if (! $keyInfo) {
- $inserted = FALSE;
- $keyInfo = $baseDoc->createElementNS(XMLSecurityDSig::XMLDSIGNS, 'ds:KeyInfo');
- $query = "./secdsig:Object";
- $nodeset = $xpath->query($query, $parentRef);
- if ($sObject = $nodeset->item(0)) {
- $sObject->parentNode->insertBefore($keyInfo, $sObject);
- $inserted = TRUE;
- }
- if (! $inserted) {
- $parentRef->appendChild($keyInfo);
- }
- }
- // Add all certs if there are more than one
- $certs = XMLSecurityDSig::staticGet509XCerts($cert, $isPEMFormat);
- // Atach X509 data node
- $x509DataNode = $baseDoc->createElementNS(XMLSecurityDSig::XMLDSIGNS, 'ds:X509Data');
- $keyInfo->appendChild($x509DataNode);
- // Atach all certificate nodes
- foreach ($certs as $X509Cert){
- $x509CertNode = $baseDoc->createElementNS(XMLSecurityDSig::XMLDSIGNS, 'ds:X509Certificate', $X509Cert);
- $x509DataNode->appendChild($x509CertNode);
- }
- }
- public function add509Cert($cert, $isPEMFormat=TRUE, $isURL=False) {
- if ($xpath = $this->getXPathObj()) {
- self::staticAdd509Cert($this->sigNode, $cert, $isPEMFormat, $isURL, $xpath);
- }
- }
- /* This function retrieves an associative array of the validated nodes.
- *
- * The array will contain the id of the referenced node as the key and the node itself
- * as the value.
- *
- * Returns:
- * An associative array of validated nodes or NULL if no nodes have been validated.
- */
- public function getValidatedNodes() {
- return $this->validatedNodes;
- }
- }
- 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#';
- private $encdoc = NULL;
- private $rawNode = NULL;
- public $type = NULL;
- public $encKey = NULL;
- public function __construct() {
- $this->encdoc = new DOMDocument();
- $this->encdoc->loadXML(XMLSecEnc::template);
- }
- public function setNode($node) {
- $this->rawNode = $node;
- }
- public function encryptNode($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);
- …
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