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plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/.markdownlintrc

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+{
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+  "MD013": false
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/LICENSE

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+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
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+That's all there is to it!

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/README.md

@@ -0,0 +1,6 @@
+# xml-common
+
+![Build Status](https://github.com/simplesamlphp/xml-common/actions/workflows/php.yml/badge.svg)
+[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/simplesamlphp/xml-common/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/simplesamlphp/xml-common/?branch=master)
+[![Coverage Status](https://codecov.io/gh/simplesamlphp/xml-common/branch/master/graph/badge.svg)](https://codecov.io/gh/simplesamlphp/xml-common)
+[![PHPStan Enabled](https://img.shields.io/badge/PHPStan-enabled-brightgreen.svg?style=flat)](https://github.com/simplesamlphp/xml-common)

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/composer.json

@@ -0,0 +1,56 @@
+{
+    "name": "simplesamlphp/xml-common",
+    "description": "A library with classes and utilities for handling XML structures.",
+    "type": "simplesamlphp-xmlprovider",
+    "keywords": ["saml", "xml"],
+    "homepage": "http://simplesamlphp.org",
+    "license": "LGPL-2.1-or-later",
+    "authors": [
+        {
+            "name": "Jaime Perez",
+            "email": "jaime.perez@uninett.no"
+        },
+        {
+            "name": "Tim van Dijen",
+            "email": "tvdijen@gmail.com"
+        }
+    ],
+    "autoload": {
+        "psr-4": {
+            "SimpleSAML\\XML\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "SimpleSAML\\Test\\XML\\": ["tests/XML", "tests/Utils"]
+        }
+    },
+    "require": {
+        "php": "^8.1",
+        "ext-date": "*",
+        "ext-dom": "*",
+        "ext-filter": "*",
+        "ext-libxml": "*",
+        "ext-pcre": "*",
+        "ext-spl": "*",
+
+        "simplesamlphp/assert": "~1.8.0",
+        "simplesamlphp/composer-xmlprovider-installer": "~1.0.0",
+        "symfony/finder": "^6.4"
+    },
+    "require-dev": {
+        "simplesamlphp/simplesamlphp-test-framework": "^1.7"
+    },
+    "support": {
+        "issues": "https://github.com/simplesamlphp/xml-common/issues",
+        "source": "https://github.com/simplesamlphp/xml-common"
+    },
+    "config": {
+        "allow-plugins": {
+            "composer/package-versions-deprecated": true,
+            "dealerdirect/phpcodesniffer-composer-installer": true,
+            "phpstan/extension-installer": true,
+            "simplesamlphp/composer-xmlprovider-installer": true
+        }
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/schemas/xml.xsd

@@ -0,0 +1,286 @@
+<?xml version='1.0'?>
+<?xml-stylesheet href="../../2008/09/xsd.xsl" type="text/xsl"?>
+<xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace" 
+  xmlns:xs="http://www.w3.org/2001/XMLSchema" 
+  xmlns   ="http://www.w3.org/1999/xhtml"
+  xml:lang="en">
+
+ <xs:annotation>
+  <xs:documentation>
+   <div>
+    <h1>About the XML namespace</h1>
+
+    <div class="bodytext">
+     <p>
+      This schema document describes the XML namespace, in a form
+      suitable for import by other schema documents.
+     </p>
+     <p>
+      See <a href="http://www.w3.org/XML/1998/namespace.html">
+      http://www.w3.org/XML/1998/namespace.html</a> and
+      <a href="http://www.w3.org/TR/REC-xml">
+      http://www.w3.org/TR/REC-xml</a> for information 
+      about this namespace.
+     </p>
+     <p>
+      Note that local names in this namespace are intended to be
+      defined only by the World Wide Web Consortium or its subgroups.
+      The names currently defined in this namespace are listed below.
+      They should not be used with conflicting semantics by any Working
+      Group, specification, or document instance.
+     </p>
+     <p>   
+      See further below in this document for more information about <a
+      href="#usage">how to refer to this schema document from your own
+      XSD schema documents</a> and about <a href="#nsversioning">the
+      namespace-versioning policy governing this schema document</a>.
+     </p>
+    </div>
+   </div>
+  </xs:documentation>
+ </xs:annotation>
+
+ <xs:attribute name="lang">
+  <xs:annotation>
+   <xs:documentation>
+    <div>
+     
+      <h3>lang (as an attribute name)</h3>
+      <p>
+       denotes an attribute whose value
+       is a language code for the natural language of the content of
+       any element; its value is inherited.  This name is reserved
+       by virtue of its definition in the XML specification.</p>
+     
+    </div>
+    <div>
+     <h4>Notes</h4>
+     <p>
+      Attempting to install the relevant ISO 2- and 3-letter
+      codes as the enumerated possible values is probably never
+      going to be a realistic possibility.  
+     </p>
+     <p>
+      See BCP 47 at <a href="http://www.rfc-editor.org/rfc/bcp/bcp47.txt">
+       http://www.rfc-editor.org/rfc/bcp/bcp47.txt</a>
+      and the IANA language subtag registry at
+      <a href="http://www.iana.org/assignments/language-subtag-registry">
+       http://www.iana.org/assignments/language-subtag-registry</a>
+      for further information.
+     </p>
+     <p>
+      The union allows for the 'un-declaration' of xml:lang with
+      the empty string.
+     </p>
+    </div>
+   </xs:documentation>
+  </xs:annotation>
+  <xs:simpleType>
+   <xs:union memberTypes="xs:language">
+    <xs:simpleType>    
+     <xs:restriction base="xs:string">
+      <xs:enumeration value=""/>
+     </xs:restriction>
+    </xs:simpleType>
+   </xs:union>
+  </xs:simpleType>
+ </xs:attribute>
+
+ <xs:attribute name="space">
+  <xs:annotation>
+   <xs:documentation>
+    <div>
+     
+      <h3>space (as an attribute name)</h3>
+      <p>
+       denotes an attribute whose
+       value is a keyword indicating what whitespace processing
+       discipline is intended for the content of the element; its
+       value is inherited.  This name is reserved by virtue of its
+       definition in the XML specification.</p>
+     
+    </div>
+   </xs:documentation>
+  </xs:annotation>
+  <xs:simpleType>
+   <xs:restriction base="xs:NCName">
+    <xs:enumeration value="default"/>
+    <xs:enumeration value="preserve"/>
+   </xs:restriction>
+  </xs:simpleType>
+ </xs:attribute>
+ 
+ <xs:attribute name="base" type="xs:anyURI"> <xs:annotation>
+   <xs:documentation>
+    <div>
+     
+      <h3>base (as an attribute name)</h3>
+      <p>
+       denotes an attribute whose value
+       provides a URI to be used as the base for interpreting any
+       relative URIs in the scope of the element on which it
+       appears; its value is inherited.  This name is reserved
+       by virtue of its definition in the XML Base specification.</p>
+     
+     <p>
+      See <a
+      href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a>
+      for information about this attribute.
+     </p>
+    </div>
+   </xs:documentation>
+  </xs:annotation>
+ </xs:attribute>
+ 
+ <xs:attribute name="id" type="xs:ID">
+  <xs:annotation>
+   <xs:documentation>
+    <div>
+     
+      <h3>id (as an attribute name)</h3> 
+      <p>
+       denotes an attribute whose value
+       should be interpreted as if declared to be of type ID.
+       This name is reserved by virtue of its definition in the
+       xml:id specification.</p>
+     
+     <p>
+      See <a
+      href="http://www.w3.org/TR/xml-id/">http://www.w3.org/TR/xml-id/</a>
+      for information about this attribute.
+     </p>
+    </div>
+   </xs:documentation>
+  </xs:annotation>
+ </xs:attribute>
+
+ <xs:attributeGroup name="specialAttrs">
+  <xs:attribute ref="xml:base"/>
+  <xs:attribute ref="xml:lang"/>
+  <xs:attribute ref="xml:space"/>
+  <xs:attribute ref="xml:id"/>
+ </xs:attributeGroup>
+
+ <xs:annotation>
+  <xs:documentation>
+   <div>
+   
+    <h3>Father (in any context at all)</h3> 
+
+    <div class="bodytext">
+     <p>
+      denotes Jon Bosak, the chair of 
+      the original XML Working Group.  This name is reserved by 
+      the following decision of the W3C XML Plenary and 
+      XML Coordination groups:
+     </p>
+     <blockquote>
+       <p>
+	In appreciation for his vision, leadership and
+	dedication the W3C XML Plenary on this 10th day of
+	February, 2000, reserves for Jon Bosak in perpetuity
+	the XML name "xml:Father".
+       </p>
+     </blockquote>
+    </div>
+   </div>
+  </xs:documentation>
+ </xs:annotation>
+
+ <xs:annotation>
+  <xs:documentation>
+   <div xml:id="usage" id="usage">
+    <h2><a name="usage">About this schema document</a></h2>
+
+    <div class="bodytext">
+     <p>
+      This schema defines attributes and an attribute group suitable
+      for use by schemas wishing to allow <code>xml:base</code>,
+      <code>xml:lang</code>, <code>xml:space</code> or
+      <code>xml:id</code> attributes on elements they define.
+     </p>
+     <p>
+      To enable this, such a schema must import this schema for
+      the XML namespace, e.g. as follows:
+     </p>
+     <pre>
+          &lt;schema . . .>
+           . . .
+           &lt;import namespace="http://www.w3.org/XML/1998/namespace"
+                      schemaLocation="http://www.w3.org/2001/xml.xsd"/>
+     </pre>
+     <p>
+      or
+     </p>
+     <pre>
+           &lt;import namespace="http://www.w3.org/XML/1998/namespace"
+                      schemaLocation="http://www.w3.org/2009/01/xml.xsd"/>
+     </pre>
+     <p>
+      Subsequently, qualified reference to any of the attributes or the
+      group defined below will have the desired effect, e.g.
+     </p>
+     <pre>
+          &lt;type . . .>
+           . . .
+           &lt;attributeGroup ref="xml:specialAttrs"/>
+     </pre>
+     <p>
+      will define a type which will schema-validate an instance element
+      with any of those attributes.
+     </p>
+    </div>
+   </div>
+  </xs:documentation>
+ </xs:annotation>
+
+ <xs:annotation>
+  <xs:documentation>
+   <div id="nsversioning" xml:id="nsversioning">
+    <h2><a name="nsversioning">Versioning policy for this schema document</a></h2>
+    <div class="bodytext">
+     <p>
+      In keeping with the XML Schema WG's standard versioning
+      policy, this schema document will persist at
+      <a href="http://www.w3.org/2009/01/xml.xsd">
+       http://www.w3.org/2009/01/xml.xsd</a>.
+     </p>
+     <p>
+      At the date of issue it can also be found at
+      <a href="http://www.w3.org/2001/xml.xsd">
+       http://www.w3.org/2001/xml.xsd</a>.
+     </p>
+     <p>
+      The schema document at that URI may however change in the future,
+      in order to remain compatible with the latest version of XML
+      Schema itself, or with the XML namespace itself.  In other words,
+      if the XML Schema or XML namespaces change, the version of this
+      document at <a href="http://www.w3.org/2001/xml.xsd">
+       http://www.w3.org/2001/xml.xsd 
+      </a> 
+      will change accordingly; the version at 
+      <a href="http://www.w3.org/2009/01/xml.xsd">
+       http://www.w3.org/2009/01/xml.xsd 
+      </a> 
+      will not change.
+     </p>
+     <p>
+      Previous dated (and unchanging) versions of this schema 
+      document are at:
+     </p>
+     <ul>
+      <li><a href="http://www.w3.org/2009/01/xml.xsd">
+	http://www.w3.org/2009/01/xml.xsd</a></li>
+      <li><a href="http://www.w3.org/2007/08/xml.xsd">
+	http://www.w3.org/2007/08/xml.xsd</a></li>
+      <li><a href="http://www.w3.org/2004/10/xml.xsd">
+	http://www.w3.org/2004/10/xml.xsd</a></li>
+      <li><a href="http://www.w3.org/2001/03/xml.xsd">
+	http://www.w3.org/2001/03/xml.xsd</a></li>
+     </ul>
+    </div>
+   </div>
+  </xs:documentation>
+ </xs:annotation>
+
+</xs:schema>

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/domdocument_doctype.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+    <!DOCTYPE foo [<!ELEMENT foo ANY > <!ENTITY xxe SYSTEM "file:///dev/urandom" >]>
+<foo>&xxe;</foo>

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/domdocument_invalid_xml.xml

@@ -0,0 +1 @@
+this is not xml

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/domdocument_valid_xml.xml

@@ -0,0 +1 @@
+<root />

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/ssp_Base64Element.xml

@@ -0,0 +1 @@
+<ssp:Base64Element xmlns:ssp="urn:x-simplesamlphp:namespace">/CTj03d1DB5e2t7CTo9BEzCf5S9NRzwnBgZRlm32REI=</ssp:Base64Element>

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/ssp_Element.xml

@@ -0,0 +1 @@
+<ssp:Element xmlns:ssp="urn:x-simplesamlphp:namespace" integer="2" boolean="false" text="text" />

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/ssp_ExtendableAttributesElement.xml

@@ -0,0 +1 @@
+<ssp:ExtendableAttributesElement xmlns:ssp="urn:x-simplesamlphp:namespace" ssp:attr1="testval1" ssp:attr2="testval2" />

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/ssp_ExtendableElement.xml

@@ -0,0 +1,4 @@
+<ssp:ExtendableElement xmlns:ssp="urn:x-simplesamlphp:namespace">
+  <ssp:Chunk>some</ssp:Chunk>
+  <dummy:Chunk xmlns:dummy="urn:custom:dummy">some</dummy:Chunk>
+</ssp:ExtendableElement>

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/ssp_LocalizedStringElement.xml

@@ -0,0 +1 @@
+<ssp:LocalizedStringElement xmlns:ssp="urn:x-simplesamlphp:namespace" xml:lang="en">test</ssp:LocalizedStringElement>

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/ssp_QNameElement.xml

@@ -0,0 +1 @@
+<ssp:QNameElement xmlns:ssp="urn:x-simplesamlphp:namespace" xmlns:env="http://www.w3.org/2003/05/soap-envelope">env:Sender</ssp:QNameElement>

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/resources/xml/ssp_StringElement.xml

@@ -0,0 +1 @@
+<ssp:StringElement xmlns:ssp="urn:x-simplesamlphp:namespace">test</ssp:StringElement>

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/AbstractElement.php

@@ -0,0 +1,314 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use RuntimeException;
+use SimpleSAML\XML\Assert\Assert;
+use SimpleSAML\XML\Exception\MissingAttributeException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+use SimpleSAML\XML\SerializableElementTrait;
+
+use function array_slice;
+use function defined;
+use function explode;
+use function func_num_args;
+use function in_array;
+use function intval;
+use function join;
+use function strval;
+
+/**
+ * Abstract class to be implemented by all classes
+ *
+ * @package simplesamlphp/xml-common
+ */
+abstract class AbstractElement implements SerializableElementInterface
+{
+    use SerializableElementTrait;
+
+
+    /**
+     * Create a document structure for this element
+     *
+     * @param \DOMElement|null $parent The element we should append to.
+     * @return \DOMElement
+     */
+    public function instantiateParentElement(?DOMElement $parent = null): DOMElement
+    {
+        $qualifiedName = $this->getQualifiedName();
+        $namespace = static::getNamespaceURI();
+
+        if ($parent === null) {
+            $parent = DOMDocumentFactory::create();
+            $e = $parent->createElementNS($namespace, $qualifiedName);
+        } else {
+            $doc = $parent->ownerDocument;
+            Assert::notNull($doc);
+            $e = $doc->createElementNS($namespace, $qualifiedName);
+        }
+
+        $parent->appendChild($e);
+
+        return $e;
+    }
+
+
+    /**
+     * Get the value of an attribute from a given element.
+     *
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return string
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     */
+    public static function getAttribute(DOMElement $xml, string $name): string
+    {
+        $prefix = static::getNamespacePrefix();
+        $localName = static::getLocalName();
+        $qName = $prefix ? ($prefix . ':' . $localName) : $localName;
+        Assert::true(
+            $xml->hasAttribute($name) && func_num_args() === 2,
+            sprintf('Missing \'%s\' attribute on %s.', $name, $qName),
+            MissingAttributeException::class,
+        );
+
+        return $xml->getAttribute($name);
+    }
+
+
+    /**
+     * Get the value of an attribute from a given element.
+     *
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param string|null $default The default to return in case the attribute does not exist and it is optional.
+     * @return ($default is string ? string : string|null)
+     */
+    public static function getOptionalAttribute(DOMElement $xml, string $name, ?string $default = null): ?string
+    {
+        if (!$xml->hasAttribute($name)) {
+            return $default;
+        }
+
+        return self::getAttribute($xml, $name);
+    }
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return bool
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not a boolean
+     */
+    public static function getBooleanAttribute(DOMElement $xml, string $name): bool
+    {
+        $value = self::getAttribute($xml, $name);
+
+        $prefix = static::getNamespacePrefix();
+        $localName = static::getLocalName();
+        $qName = $prefix ? ($prefix . ':' . $localName) : $localName;
+        Assert::oneOf(
+            $value,
+            ['0', '1', 'false', 'true'],
+            sprintf('The \'%s\' attribute of %s must be a boolean.', $name, $qName),
+        );
+
+        return in_array($value, ['1', 'true'], true);
+    }
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param bool|null   $default The default to return in case the attribute does not exist and it is optional.
+     * @return ($default is bool ? bool : bool|null)
+     *
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not a boolean
+     */
+    public static function getOptionalBooleanAttribute(DOMElement $xml, string $name, ?bool $default = null): ?bool
+    {
+        if (!$xml->hasAttribute($name)) {
+            return $default;
+        }
+
+        return self::getBooleanAttribute($xml, $name);
+    }
+
+
+    /**
+     * Get the integer value of an attribute from a given element.
+     *
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return int
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not an integer
+     */
+    public static function getIntegerAttribute(DOMElement $xml, string $name): int
+    {
+        $value = self::getAttribute($xml, $name);
+
+        $prefix = static::getNamespacePrefix();
+        $localName = static::getLocalName();
+        $qName = $prefix ? ($prefix . ':' . $localName) : $localName;
+        Assert::numeric(
+            $value,
+            sprintf('The \'%s\' attribute of %s must be numerical.', $name, $qName),
+        );
+
+        return intval($value);
+    }
+
+
+    /**
+     * Get the integer value of an attribute from a given element.
+     *
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param int|null    $default The default to return in case the attribute does not exist and it is optional.
+     * @return ($default is int ? int : int|null)
+     *
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not an integer
+     */
+    public static function getOptionalIntegerAttribute(DOMElement $xml, string $name, ?int $default = null): ?int
+    {
+        if (!$xml->hasAttribute($name)) {
+            return $default;
+        }
+
+        return self::getIntegerAttribute($xml, $name);
+    }
+
+
+    /**
+     * Static method that processes a fully namespaced class name and returns the name of the class from it.
+     *
+     * @param string $class
+     * @return string
+     */
+    public static function getClassName(string $class): string
+    {
+        $ncName = join('', array_slice(explode('\\', $class), -1));
+        Assert::validNCName($ncName, SchemaViolationException::class);
+        return $ncName;
+    }
+
+
+    /**
+     * Get the XML qualified name (prefix:name) of the element represented by this class.
+     *
+     * @return string
+     */
+    public function getQualifiedName(): string
+    {
+        $prefix = static::getNamespacePrefix();
+        $qName = $prefix ? ($prefix . ':' . static::getLocalName()) : static::getLocalName();
+        Assert::validQName($qName, SchemaViolationException::class);
+        return $qName;
+    }
+
+
+    /**
+     * Extract localized names from the children of a given element.
+     *
+     * @param \DOMElement $parent The element we want to search.
+     * @return array<static> An array of objects of this class.
+     */
+    public static function getChildrenOfClass(DOMElement $parent): array
+    {
+        $ret = [];
+        foreach ($parent->childNodes as $node) {
+            if (
+                $node instanceof DOMElement
+                && $node->namespaceURI === static::getNamespaceURI()
+                && $node->localName === static::getLocalName()
+            ) {
+                // Normalize the DOMElement by importing it into a clean empty document
+                $newDoc = DOMDocumentFactory::create();
+                /** @var \DOMElement $node */
+                $node = $newDoc->appendChild($newDoc->importNode($node, true));
+
+                $ret[] = static::fromXML($node);
+            }
+        }
+
+        return $ret;
+    }
+
+
+    /**
+     * Get the namespace for the element.
+     *
+     * @return string|null
+     */
+    public static function getNamespaceURI(): ?string
+    {
+        Assert::true(
+            defined('static::NS'),
+            self::getClassName(static::class)
+            . '::NS constant must be defined and set to the namespace for the XML-class it represents.',
+            RuntimeException::class,
+        );
+        // @phpstan-ignore classConstant.notFound
+        Assert::nullOrValidURI(static::NS, SchemaViolationException::class); // @phpstan-ignore-line
+
+        // @phpstan-ignore classConstant.notFound
+        return static::NS; // @phpstan-ignore-line
+    }
+
+
+    /**
+     * Get the namespace-prefix for the element.
+     *
+     * @return string
+     */
+    public static function getNamespacePrefix(): string
+    {
+        Assert::true(
+            defined('static::NS_PREFIX'),
+            self::getClassName(static::class)
+            . '::NS_PREFIX constant must be defined and set to the namespace prefix for the XML-class it represents.',
+            RuntimeException::class,
+        );
+
+        // @phpstan-ignore classConstant.notFound
+        return strval(static::NS_PREFIX); // @phpstan-ignore-line
+    }
+
+
+    /**
+     * Get the local name for the element.
+     *
+     * @return string
+     */
+    public static function getLocalName(): string
+    {
+        if (defined('static::LOCALNAME')) {
+            $ncName = static::LOCALNAME;
+        } else {
+            $ncName = self::getClassName(static::class);
+        }
+
+        Assert::validNCName($ncName, SchemaViolationException::class);
+        return $ncName;
+    }
+
+
+    /**
+     * Test if an object, at the state it's in, would produce an empty XML-element
+     *
+     * @codeCoverageIgnore
+     * @return bool
+     */
+    public function isEmptyElement(): bool
+    {
+        return false;
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/ArrayizableElementInterface.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+/**
+ * interface class to be implemented by all the classes that represent an arrayizable XML element
+ *
+ * @package simplesamlphp/xml-common
+ */
+interface ArrayizableElementInterface
+{
+    /**
+     * Create a class from an array
+     *
+     * @param array<string, mixed> $data
+     * @return static
+     */
+    public static function fromArray(array $data): static;
+
+
+    /**
+     * Create an array from this class
+     *
+     * @return array<string, mixed>
+     */
+    public function toArray(): array;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Assert/Assert.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Assert;
+
+use SimpleSAML\Assert\Assert as BaseAssert;
+
+/**
+ * @package simplesamlphp/xml-common
+ *
+ * @method static void validHexBinary(mixed $value, string $message = '', string $exception = '')
+ * @method static void validNMToken(mixed $value, string $message = '', string $exception = '')
+ * @method static void validNMTokens(mixed $value, string $message = '', string $exception = '')
+ * @method static void validDuration(mixed $value, string $message = '', string $exception = '')
+ * @method static void validDateTime(mixed $value, string $message = '', string $exception = '')
+ * @method static void validNCName(mixed $value, string $message = '', string $exception = '')
+ * @method static void validQName(mixed $value, string $message = '', string $exception = '')
+ * @method static void nullOrValidHexBinary(mixed $value, string $message = '', string $exception = '')
+ * @method static void nullOrValidNMToken(mixed $value, string $message = '', string $exception = '')
+ * @method static void nullOrValidNMTokens(mixed $value, string $message = '', string $exception = '')
+ * @method static void nullOrValidDuration(mixed $value, string $message = '', string $exception = '')
+ * @method static void nullOrValidDateTime(mixed $value, string $message = '', string $exception = '')
+ * @method static void nullOrValidNCName(mixed $value, string $message = '', string $exception = '')
+ * @method static void nullOrValidQName(mixed $value, string $message = '', string $exception = '')
+ * @method static void allValidHexBinary(mixed $value, string $message = '', string $exception = '')
+ * @method static void allValidNMToken(mixed $value, string $message = '', string $exception = '')
+ * @method static void allValidNMTokens(mixed $value, string $message = '', string $exception = '')
+ * @method static void allValidDuration(mixed $value, string $message = '', string $exception = '')
+ * @method static void allValidDateTime(mixed $value, string $message = '', string $exception = '')
+ * @method static void allValidNCName(mixed $value, string $message = '', string $exception = '')
+ * @method static void allValidQName(mixed $value, string $message = '', string $exception = '')
+ */
+class Assert extends BaseAssert
+{
+    use DateTimeTrait;
+    use DurationTrait;
+    use HexBinTrait;
+    use NamesTrait;
+    use TokensTrait;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Assert/DateTimeTrait.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Assert;
+
+use InvalidArgumentException;
+
+use function filter_var;
+use function sprintf;
+
+/**
+ * @package simplesamlphp/xml-common
+ */
+trait DateTimeTrait
+{
+    /** @var string */
+    private static string $datetime_regex = '/-?[0-9]{4}-(((0(1|3|5|7|8)|1(0|2))-(0[1-9]|(1|2)[0-9]|3[0-1]))|((0(4|6|9)|11)-(0[1-9]|(1|2)[0-9]|30))|(02-(0[1-9]|(1|2)[0-9])))T([0-1][0-9]|2[0-4]):(0[0-9]|[1-5][0-9]):(0[0-9]|[1-5][0-9])(\.[0-999])?((\+|-)([0-1][0-9]|2[0-4]):(0[0-9]|[1-5][0-9])|Z)?/i';
+
+    /***********************************************************************************
+     *  NOTE:  Custom assertions may be added below this line.                         *
+     *         They SHOULD be marked as `protected` to ensure the call is forced       *
+     *          through __callStatic().                                                *
+     *         Assertions marked `public` are called directly and will                 *
+     *          not handle any custom exception passed to it.                          *
+     ***********************************************************************************/
+
+
+    /**
+     * @param string $value
+     * @param string $message
+     */
+    protected static function validDateTime(string $value, string $message = ''): void
+    {
+        if (filter_var($value, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => self::$datetime_regex]]) === false) {
+            throw new InvalidArgumentException(sprintf(
+                $message ?: '\'%s\' is not a valid xs:dateTime',
+                $value,
+            ));
+        }
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Assert/DurationTrait.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Assert;
+
+use InvalidArgumentException;
+
+use function filter_var;
+use function sprintf;
+
+/**
+ * @package simplesamlphp/xml-common
+ */
+trait DurationTrait
+{
+    /** @var string */
+    private static string $duration_regex = '/^([-+]?)P(?!$)(?:(?<years>\d+(?:[\.\,]\d+)?)Y)?(?:(?<months>\d+(?:[\.\,]\d+)?)M)?(?:(?<weeks>\d+(?:[\.\,]\d+)?)W)?(?:(?<days>\d+(?:[\.\,]\d+)?)D)?(T(?=\d)(?:(?<hours>\d+(?:[\.\,]\d+)?)H)?(?:(?<minutes>\d+(?:[\.\,]\d+)?)M)?(?:(?<seconds>\d+(?:[\.\,]\d+)?)S)?)?$/D';
+
+    /***********************************************************************************
+     *  NOTE:  Custom assertions may be added below this line.                         *
+     *         They SHOULD be marked as `protected` to ensure the call is forced       *
+     *          through __callStatic().                                                *
+     *         Assertions marked `public` are called directly and will                 *
+     *          not handle any custom exception passed to it.                          *
+     ***********************************************************************************/
+
+
+    /**
+     * @param string $value
+     * @param string $message
+     */
+    protected static function validDuration(string $value, string $message = ''): void
+    {
+        if (filter_var($value, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => self::$duration_regex]]) === false) {
+            throw new InvalidArgumentException(sprintf(
+                $message ?: '\'%s\' is not a valid xs:duration',
+                $value,
+            ));
+        }
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Assert/HexBinTrait.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Assert;
+
+use InvalidArgumentException;
+
+use function filter_var;
+use function sprintf;
+
+/**
+ * @package simplesamlphp/xml-common
+ */
+trait HexBinTrait
+{
+    /** @var string */
+    private static string $hexbin_regex = '/^([0-9a-fA-F]{2})+$/D';
+
+    /***********************************************************************************
+     *  NOTE:  Custom assertions may be added below this line.                         *
+     *         They SHOULD be marked as `protected` to ensure the call is forced       *
+     *          through __callStatic().                                                *
+     *         Assertions marked `public` are called directly and will                 *
+     *          not handle any custom exception passed to it.                          *
+     ***********************************************************************************/
+
+
+    /**
+     * @param string $value
+     * @param string $message
+     */
+    protected static function validHexBinary(string $value, string $message = ''): void
+    {
+        $result = true;
+
+        if (filter_var($value, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => self::$hexbin_regex]]) === false) {
+            $result = false;
+        }
+
+        if ($result === false) {
+            throw new InvalidArgumentException(sprintf(
+                $message ?: '\'%s\' is not a valid hexBinary string',
+                $value,
+            ));
+        }
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Assert/NamesTrait.php

@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Assert;
+
+use InvalidArgumentException;
+
+use function filter_var;
+use function sprintf;
+
+/**
+ * @package simplesamlphp/xml-common
+ */
+trait NamesTrait
+{
+    /** @var string */
+    private static string $ncname_regex = '/^[a-zA-Z_][\w.-]*$/D';
+
+    /** @var string */
+    private static string $qname_regex = '/^[a-zA-Z_][\w.-]*:[a-zA-Z_][\w.-]*$/D';
+
+    /***********************************************************************************
+     *  NOTE:  Custom assertions may be added below this line.                         *
+     *         They SHOULD be marked as `protected` to ensure the call is forced       *
+     *          through __callStatic().                                                *
+     *         Assertions marked `public` are called directly and will                 *
+     *          not handle any custom exception passed to it.                          *
+     ***********************************************************************************/
+
+
+    /**
+     * @param string $value
+     * @param string $message
+     */
+    protected static function validNCName(string $value, string $message = ''): void
+    {
+        if (filter_var($value, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => self::$ncname_regex]]) === false) {
+            throw new InvalidArgumentException(sprintf(
+                $message ?: '\'%s\' is not a valid non-colonized name (NCName)',
+                $value,
+            ));
+        }
+    }
+
+
+    /**
+     * @param string $value
+     * @param string $message
+     */
+    protected static function validQName(string $value, string $message = ''): void
+    {
+        if (
+            filter_var($value, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => self::$qname_regex]]) === false &&
+            filter_var($value, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => self::$ncname_regex]]) === false
+        ) {
+            throw new InvalidArgumentException(sprintf(
+                $message ?: '\'%s\' is not a valid qualified name (QName)',
+                $value,
+            ));
+        }
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Assert/TokensTrait.php

@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Assert;
+
+use InvalidArgumentException;
+
+use function filter_var;
+use function sprintf;
+
+/**
+ * @package simplesamlphp/xml-common
+ */
+trait TokensTrait
+{
+    /** @var string */
+    private static string $nmtoken_regex = '/^[\w.:-]+$/Du';
+
+    /** @var string */
+    private static string $nmtokens_regex = '/^([\w.:-]+)([\s][\w.:-]+)*$/Du';
+
+    /***********************************************************************************
+     *  NOTE:  Custom assertions may be added below this line.                         *
+     *         They SHOULD be marked as `protected` to ensure the call is forced       *
+     *          through __callStatic().                                                *
+     *         Assertions marked `public` are called directly and will                 *
+     *          not handle any custom exception passed to it.                          *
+     ***********************************************************************************/
+
+
+    /**
+     * @param string $value
+     * @param string $message
+     */
+    protected static function validNMToken(string $value, string $message = ''): void
+    {
+        if (filter_var($value, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => self::$nmtoken_regex]]) === false) {
+            throw new InvalidArgumentException(sprintf(
+                $message ?: '\'%s\' is not a valid xs:NMTOKEN',
+                $value,
+            ));
+        }
+    }
+
+
+    /**
+     * @param string $value
+     * @param string $message
+     */
+    protected static function validNMTokens(string $value, string $message = ''): void
+    {
+        if (filter_var($value, FILTER_VALIDATE_REGEXP, ['options' => ['regexp' => self::$nmtokens_regex]]) === false) {
+            throw new InvalidArgumentException(sprintf(
+                $message ?: '\'%s\' is not a valid xs:NMTOKENS',
+                $value,
+            ));
+        }
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Attribute.php

@@ -0,0 +1,188 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMAttr;
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+
+use function array_keys;
+
+/**
+ * Class to represent an arbitrary namespaced attribute.
+ *
+ * @package simplesamlphp/xml-common
+ */
+final class Attribute implements ArrayizableElementInterface
+{
+    /**
+     * Create an Attribute class
+     *
+     * @param string|null $namespaceURI
+     * @param string|null $namespacePrefix
+     * @param string $attrName
+     * @param string $attrValue
+     */
+    public function __construct(
+        protected ?string $namespaceURI,
+        protected ?string $namespacePrefix,
+        protected string $attrName,
+        protected string $attrValue,
+    ) {
+        Assert::nullOrStringNotEmpty($namespaceURI);
+        if ($namespaceURI !== null) {
+            Assert::stringNotEmpty($namespacePrefix);
+        }
+        Assert::stringNotEmpty($attrName);
+        Assert::string($attrValue);
+    }
+
+
+    /**
+     * Collect the value of the namespaceURI-property
+     *
+     * @return string|null
+     */
+    public function getNamespaceURI(): ?string
+    {
+        return $this->namespaceURI;
+    }
+
+
+    /**
+     * Collect the value of the namespacePrefix-property
+     *
+     * @return string|null
+     */
+    public function getNamespacePrefix(): ?string
+    {
+        return $this->namespacePrefix;
+    }
+
+
+    /**
+     * Collect the value of the localName-property
+     *
+     * @return string
+     */
+    public function getAttrName(): string
+    {
+        return $this->attrName;
+    }
+
+
+    /**
+     * Collect the value of the value-property
+     *
+     * @return string
+     */
+    public function getAttrValue(): string
+    {
+        return $this->attrValue;
+    }
+
+
+    /**
+     * Create a class from XML
+     *
+     * @param \DOMAttr $attr
+     * @return static
+     */
+    public static function fromXML(DOMAttr $attr): static
+    {
+        return new static($attr->namespaceURI, $attr->prefix, $attr->localName, $attr->value);
+    }
+
+
+
+    /**
+     * Create XML from this class
+     *
+     * @param \DOMElement $parent
+     * @return \DOMElement
+     */
+    public function toXML(DOMElement $parent): DOMElement
+    {
+        $parent->setAttributeNS(
+            $this->getNamespaceURI(),
+            !in_array($this->getNamespacePrefix(), ['', null])
+                ? ($this->getNamespacePrefix() . ':' . $this->getAttrName())
+                : $this->getAttrName(),
+            $this->getAttrValue(),
+        );
+
+        return $parent;
+    }
+
+
+    /**
+     * Create a class from an array
+     *
+     * @param array{namespaceURI: string, namespacePrefix: string|null, attrName: string, attrValue: mixed} $data
+     * @return static
+     */
+    public static function fromArray(array $data): static
+    {
+        $data = self::processArrayContents($data);
+
+        return new static(
+            $data['namespaceURI'],
+            $data['namespacePrefix'],
+            $data['attrName'],
+            $data['attrValue'],
+        );
+    }
+
+
+    /**
+     * Validates an array representation of this object and returns the same array with rationalized keys
+     *
+     * @param array{namespaceURI: string, namespacePrefix: string|null, attrName: string, attrValue: mixed} $data
+     * @return array{namespaceURI: string, namespacePrefix: string|null, attrName: string, attrValue: mixed}
+     */
+    private static function processArrayContents(array $data): array
+    {
+        $data = array_change_key_case($data, CASE_LOWER);
+
+        /** @var array{namespaceuri: string, namespaceprefix: string|null, attrname: string, attrvalue: mixed} $data */
+        Assert::allOneOf(
+            array_keys($data),
+            ['namespaceuri', 'namespaceprefix', 'attrname', 'attrvalue'],
+        );
+
+        Assert::keyExists($data, 'namespaceuri');
+        Assert::keyExists($data, 'namespaceprefix');
+        Assert::keyExists($data, 'attrname');
+        Assert::keyExists($data, 'attrvalue');
+
+        Assert::nullOrStringNotEmpty($data['namespaceuri']);
+        Assert::string($data['namespaceprefix']);
+        Assert::stringNotEmpty($data['attrname']);
+        Assert::string($data['attrvalue']);
+
+        return [
+            'namespaceURI' => $data['namespaceuri'],
+            'namespacePrefix' => $data['namespaceprefix'],
+            'attrName' => $data['attrname'],
+            'attrValue' => $data['attrvalue'],
+        ];
+    }
+
+
+    /**
+     * Create an array from this class
+     *
+     * @return array{attrName: string, attrValue: string, namespacePrefix: string, namespaceURI: null|string}
+     */
+    public function toArray(): array
+    {
+        return [
+            'namespaceURI' => $this->getNamespaceURI(),
+            'namespacePrefix' => $this->getNamespacePrefix(),
+            'attrName' => $this->getAttrName(),
+            'attrValue' => $this->getAttrValue(),
+        ];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Base64ElementTrait.php

@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+use function str_replace;
+
+/**
+ * Trait grouping common functionality for simple elements with base64 textContent
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait Base64ElementTrait
+{
+    use StringElementTrait;
+
+
+    /**
+     * Sanitize the content of the element.
+     *
+     * @param string $content  The unsanitized textContent
+     * @throws \Exception on failure
+     * @return string
+     */
+    protected function sanitizeContent(string $content): string
+    {
+        return str_replace(["\f", "\r", "\n", "\t", "\v", ' '], '', $content);
+    }
+
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        // Note: content must already be sanitized before validating
+        Assert::validBase64(
+            $this->sanitizeContent($content),
+            SchemaViolationException::class,
+        );
+    }
+
+
+    /** @return string */
+    abstract public static function getLocalName(): string;
+
+
+    /**
+     * Create a document structure for this element
+     *
+     * @param \DOMElement|null $parent The element we should append to.
+     * @return \DOMElement
+     */
+    abstract public function instantiateParentElement(?DOMElement $parent = null): DOMElement;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/BooleanElementTrait.php

@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+/**
+ * Trait grouping common functionality for simple boolean elements
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait BooleanElementTrait
+{
+    use StringElementTrait;
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        Assert::oneOf(
+            $content,
+            ['0', '1', 'false', 'true'],
+            sprintf('The value of %s must be a boolean, "%s" given.', $this->getQualifiedName(), $content),
+            SchemaViolationException::class,
+        );
+    }
+
+
+    /**
+     * Convert XML into a class instance
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   If the qualified name of the supplied element is wrong
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+
+        return new static($xml->textContent);
+    }
+
+
+    /**
+     * @param \DOMElement|null $parent
+     * @return \DOMElement
+     */
+    final public function toXML(?DOMElement $parent = null): DOMElement
+    {
+        $e = $this->instantiateParentElement($parent);
+        $e->textContent = $this->getContent();
+
+        return $e;
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Chunk.php

@@ -0,0 +1,324 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\XML\Assert\Assert;
+use SimpleSAML\XML\Exception\MissingAttributeException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+use SimpleSAML\XML\SerializableElementTrait;
+
+use function in_array;
+use function intval;
+
+/**
+ * Serializable class used to hold an XML element.
+ *
+ * @package simplesamlphp/xml-common
+ */
+final class Chunk implements SerializableElementInterface
+{
+    use SerializableElementTrait;
+
+
+    /**
+     * The localName of the element.
+     *
+     * @var string
+     */
+    protected string $localName;
+
+    /**
+     * The namespaceURI of this element.
+     *
+     * @var string|null
+     */
+    protected ?string $namespaceURI;
+
+    /**
+     * The prefix of this element.
+     *
+     * @var string
+     */
+    protected string $prefix;
+
+
+    /**
+     * Create an XML Chunk from a copy of the given \DOMElement.
+     *
+     * @param \DOMElement $xml The element we should copy.
+     */
+    public function __construct(
+        protected DOMElement $xml,
+    ) {
+        $this->setLocalName($xml->localName);
+        $this->setNamespaceURI($xml->namespaceURI);
+        $this->setPrefix($xml->prefix);
+    }
+
+
+    /**
+     * Collect the value of the localName-property
+     *
+     * @return string
+     */
+    public function getLocalName(): string
+    {
+        return $this->localName;
+    }
+
+
+    /**
+     * Set the value of the localName-property
+     *
+     * @param string $localName
+     * @throws \SimpleSAML\Assert\AssertionFailedException if $localName is an empty string
+     */
+    public function setLocalName(string $localName): void
+    {
+        Assert::validNCName($localName, SchemaViolationException::class); // Covers the empty string
+        $this->localName = $localName;
+    }
+
+
+    /**
+     * Collect the value of the namespaceURI-property
+     *
+     * @return string|null
+     */
+    public function getNamespaceURI(): ?string
+    {
+        return $this->namespaceURI;
+    }
+
+
+    /**
+     * Set the value of the namespaceURI-property
+     *
+     * @param string|null $namespaceURI
+     */
+    protected function setNamespaceURI(?string $namespaceURI = null): void
+    {
+        Assert::nullOrValidURI($namespaceURI, SchemaViolationException::class);
+        $this->namespaceURI = $namespaceURI;
+    }
+
+
+    /**
+     * Get this \DOMElement.
+     *
+     * @return \DOMElement This element.
+     */
+    public function getXML(): DOMElement
+    {
+        return $this->xml;
+    }
+
+
+    /**
+     * Collect the value of the prefix-property
+     *
+     * @return string
+     */
+    public function getPrefix(): string
+    {
+        return $this->prefix;
+    }
+
+
+    /**
+     * Set the value of the prefix-property
+     *
+     * @param string|null $prefix
+     */
+    protected function setPrefix(?string $prefix = null): void
+    {
+        $this->prefix = strval($prefix);
+    }
+
+
+    /**
+     * Get the XML qualified name (prefix:name, or just name when not prefixed)
+     *  of the element represented by this class.
+     *
+     * @return string
+     */
+    public function getQualifiedName(): string
+    {
+        $prefix = $this->getPrefix();
+
+        if (empty($prefix)) {
+            return $this->getLocalName();
+        } else {
+            return $prefix . ':' . $this->getLocalName();
+        }
+    }
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return string
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     */
+    public static function getAttribute(DOMElement $xml, string $name): string
+    {
+        Assert::true(
+            $xml->hasAttribute($name),
+            'Missing \'' . $name . '\' attribute on ' . $xml->prefix . ':' . $xml->localName . '.',
+            MissingAttributeException::class,
+        );
+
+        return $xml->getAttribute($name);
+    }
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param string|null $default The default to return in case the attribute does not exist and it is optional.
+     * @return ($default is string ? string : null)
+     */
+    public static function getOptionalAttribute(DOMElement $xml, string $name, ?string $default = null): ?string
+    {
+        if (!$xml->hasAttribute($name)) {
+            return $default;
+        }
+
+        return $xml->getAttribute($name);
+    }
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return bool
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not a boolean
+     */
+    public static function getBooleanAttribute(DOMElement $xml, string $name): bool
+    {
+        $value = self::getAttribute($xml, $name);
+
+        Assert::oneOf(
+            $value,
+            ['0', '1', 'false', 'true'],
+            'The \'' . $name . '\' attribute of ' . $xml->prefix . ':' . $xml->localName . ' must be boolean.',
+        );
+
+        return in_array($value, ['1', 'true'], true);
+    }
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param bool|null   $default The default to return in case the attribute does not exist and it is optional.
+     * @return ($default is bool ? bool : null)
+     *
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not a boolean
+     */
+    public static function getOptionalBooleanAttribute(DOMElement $xml, string $name, ?bool $default = null): ?bool
+    {
+        if (!$xml->hasAttribute($name)) {
+            return $default;
+        }
+
+        return self::getBooleanAttribute($xml, $name);
+    }
+
+
+    /**
+     * Get the integer value of an attribute from a given element.
+     *
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return int
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not an integer
+     */
+    public static function getIntegerAttribute(DOMElement $xml, string $name): int
+    {
+        $value = self::getAttribute($xml, $name);
+
+        Assert::numeric(
+            $value,
+            'The \'' . $name . '\' attribute of ' . $xml->prefix . ':' . $xml->localName . ' must be numerical.',
+        );
+
+        return intval($value);
+    }
+
+
+    /**
+     * Get the integer value of an attribute from a given element.
+     *
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param int|null    $default The default to return in case the attribute does not exist and it is optional.
+     * @return ($default is int ? int : null)
+     *
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not an integer
+     */
+    public static function getOptionalIntegerAttribute(DOMElement $xml, string $name, ?int $default = null): ?int
+    {
+        if (!$xml->hasAttribute($name)) {
+            return $default;
+        }
+
+        return self::getIntegerAttribute($xml, $name);
+    }
+
+
+    /**
+     * Test if an object, at the state it's in, would produce an empty XML-element
+     *
+     * @return bool
+     */
+    public function isEmptyElement(): bool
+    {
+        /** @var \DOMElement $xml */
+        $xml = $this->getXML();
+        return ($xml->childNodes->length === 0) && ($xml->attributes->count() === 0);
+    }
+
+
+    /**
+     * @param \DOMElement $xml
+     * @return static
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        return new static($xml);
+    }
+
+
+    /**
+     * Append this XML element to a different XML element.
+     *
+     * @param  \DOMElement|null $parent The element we should append this element to.
+     * @return \DOMElement The new element.
+     */
+    public function toXML(?DOMElement $parent = null): DOMElement
+    {
+        if ($parent === null) {
+            $doc = DOMDocumentFactory::create();
+        } else {
+            $doc = $parent->ownerDocument;
+            Assert::notNull($doc);
+        }
+
+        if ($parent === null) {
+            $parent = $doc;
+        }
+
+        $parent->appendChild($doc->importNode($this->getXML(), true));
+
+        return $doc->documentElement;
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Constants.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+/**
+ * Various XML constants.
+ *
+ * @package simplesamlphp/xml-common
+ */
+class Constants
+{
+    /**
+     * The namespace fox XML.
+     */
+    public const NS_XML = 'http://www.w3.org/XML/1998/namespace';
+
+    /**
+     * The namespace fox XML schema.
+     */
+    public const NS_XS = 'http://www.w3.org/2001/XMLSchema';
+
+    /**
+     * The namespace for XML schema instance.
+     */
+    public const NS_XSI = 'http://www.w3.org/2001/XMLSchema-instance';
+
+    /**
+     * The maximum amount of child nodes this library is willing to handle.
+     * By specification, this limit is 150K, but that opens up for denial of service.
+     */
+    public const UNBOUNDED_LIMIT = 10000;
+
+    /**
+     * The namespace for the XML Path Language 1.0
+     */
+    public const XPATH10_URI = 'http://www.w3.org/TR/1999/REC-xpath-19991116';
+
+    /**
+     * The namespace for the XML Path Language 2.0
+     */
+    public const XPATH20_URI = 'http://www.w3.org/TR/2010/REC-xpath20-20101214/';
+
+    /**
+     * The namespace for the XML Path Language 3.0
+     */
+    public const XPATH30_URI = 'https://www.w3.org/TR/2014/REC-xpath-30-20140408/';
+
+    /**
+     * The namespace for the XML Path Language 3.1
+     */
+    public const XPATH31_URI = 'https://www.w3.org/TR/2017/REC-xpath-31-20170321/';
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/DOMDocumentFactory.php

@@ -0,0 +1,119 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMDocument;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\IOException;
+use SimpleSAML\XML\Exception\RuntimeException;
+use SimpleSAML\XML\Exception\UnparseableXMLException;
+
+use function file_get_contents;
+use function func_num_args;
+use function libxml_clear_errors;
+use function libxml_set_external_entity_loader;
+use function libxml_use_internal_errors;
+use function sprintf;
+
+/**
+ * @package simplesamlphp/xml-common
+ */
+final class DOMDocumentFactory
+{
+    /**
+     * @var non-negative-int
+     * TODO: Add LIBXML_NO_XXE to the defaults when PHP 8.4.0 + libxml 2.13.0 become generally available
+     */
+    public const DEFAULT_OPTIONS = LIBXML_COMPACT | LIBXML_NONET | LIBXML_NSCLEAN;
+
+
+    /**
+     * @param string $xml
+     * @param non-negative-int $options
+     *
+     * @return \DOMDocument
+     */
+    public static function fromString(
+        string $xml,
+        int $options = self::DEFAULT_OPTIONS,
+    ): DOMDocument {
+        libxml_set_external_entity_loader(null);
+        Assert::notWhitespaceOnly($xml);
+        Assert::notRegex(
+            $xml,
+            '/<(\s*)!(\s*)DOCTYPE/',
+            'Dangerous XML detected, DOCTYPE nodes are not allowed in the XML body',
+            RuntimeException::class,
+        );
+
+        $internalErrors = libxml_use_internal_errors(true);
+        libxml_clear_errors();
+
+        // If LIBXML_NO_XXE is available and option not set
+        if (func_num_args() === 1 && defined('LIBXML_NO_XXE')) {
+            $options |= LIBXML_NO_XXE;
+        }
+
+        $domDocument = self::create();
+        $loaded = $domDocument->loadXML($xml, $options);
+
+        libxml_use_internal_errors($internalErrors);
+
+        if (!$loaded) {
+            $error = libxml_get_last_error();
+            libxml_clear_errors();
+
+            throw new UnparseableXMLException($error);
+        }
+
+        libxml_clear_errors();
+
+        foreach ($domDocument->childNodes as $child) {
+            Assert::false(
+                $child->nodeType === XML_DOCUMENT_TYPE_NODE,
+                'Dangerous XML detected, DOCTYPE nodes are not allowed in the XML body',
+                RuntimeException::class,
+            );
+        }
+
+        return $domDocument;
+    }
+
+
+    /**
+     * @param string $file
+     * @param non-negative-int $options
+     *
+     * @return \DOMDocument
+     */
+    public static function fromFile(
+        string $file,
+        ?string $schemaFile = null,
+        int $options = self::DEFAULT_OPTIONS,
+    ): DOMDocument {
+        error_clear_last();
+        $xml = @file_get_contents($file);
+        if ($xml === false) {
+            $e = error_get_last();
+            $error = $e['message'] ?? "Check that the file exists and can be read.";
+
+            throw new IOException("File '$file' was not loaded;  $error");
+        }
+
+        Assert::notWhitespaceOnly($xml, sprintf('File "%s" does not have content', $file), RuntimeException::class);
+        return (func_num_args() < 2) ? static::fromString($xml) : static::fromString($xml, $options);
+    }
+
+
+    /**
+     * @param string $version
+     * @param string $encoding
+     * @return \DOMDocument
+     */
+    public static function create(string $version = '1.0', string $encoding = 'UTF-8'): DOMDocument
+    {
+        return new DOMDocument($version, $encoding);
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/ElementInterface.php

@@ -0,0 +1,89 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+
+/**
+ * interface class to be implemented by all the classes that represent an XML element
+ *
+ * @package simplesamlphp/xml-common
+ */
+interface ElementInterface
+{
+    /**
+     * Get the XML qualified name (prefix:name) of the element represented by this class.
+     *
+     * @return string
+     */
+    public function getQualifiedName(): string;
+
+
+    /**
+     * Get the value of an attribute from a given element.
+     *
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return string
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     */
+    public static function getAttribute(DOMElement $xml, string $name): string;
+
+
+    /**
+     * Get the value of an attribute from a given element.
+     *
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param string|null $default The default to return in case the attribute does not exist and it is optional.
+     * @return string|null
+     */
+    public static function getOptionalAttribute(DOMElement $xml, string $name, ?string $default = null): ?string;
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return bool
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not a boolean
+     */
+    public static function getBooleanAttribute(DOMElement $xml, string $name): bool;
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param bool|null   $default The default to return in case the attribute does not exist and it is optional.
+     * @return bool|null
+     *
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not a boolean
+     */
+    public static function getOptionalBooleanAttribute(DOMElement $xml, string $name, ?bool $default = null): ?bool;
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @return int
+     *
+     * @throws \SimpleSAML\XML\Exception\MissingAttributeException if the attribute is missing from the element
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not an integer
+     */
+    public static function getIntegerAttribute(DOMElement $xml, string $name): int;
+
+
+    /**
+     * @param \DOMElement $xml The element where we should search for the attribute.
+     * @param string      $name The name of the attribute.
+     * @param int|null    $default The default to return in case the attribute does not exist and it is optional.
+     * @return int|null
+     *
+     * @throws \SimpleSAML\Assert\AssertionFailedException if the attribute is not an integer
+     */
+    public static function getOptionalIntegerAttribute(DOMElement $xml, string $name, ?int $default = null): ?int;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Exception/IOException.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Exception;
+
+/**
+ * Class IOException
+ *
+ * This exception is thrown when an I/O operation cannot be handled
+ *
+ * @package simplesamlphp/xml-common
+ */
+class IOException extends RuntimeException
+{
+    /**
+     * @param string|null $message
+     */
+    public function __construct(?string $message = null)
+    {
+        parent::__construct($message ?: 'Generic I/O Exception.');
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Exception/InvalidDOMElementException.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Exception;
+
+use InvalidArgumentException;
+
+/**
+ * This exception may be raised when the passed DOMElement is of the wrong type
+ *
+ * @package simplesamlphp/xml-common
+ */
+class InvalidDOMElementException extends InvalidArgumentException
+{
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Exception/MissingAttributeException.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Exception;
+
+/**
+ * This exception may be raised when the passed DOMElement is missing a mandatory attribute
+ *
+ * @package simplesamlphp/xml-common
+ */
+class MissingAttributeException extends SchemaViolationException
+{
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Exception/MissingElementException.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Exception;
+
+/**
+ * This exception may be raised when the passed DOMElement is missing mandatory child-elements
+ *
+ * @package simplesamlphp/xml-common
+ */
+class MissingElementException extends SchemaViolationException
+{
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Exception/RuntimeException.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Exception;
+
+use RuntimeException as BuiltinRuntimeException;
+
+/**
+ * Class RuntimeException
+ *
+ * This exception is thrown when an error occurs during processing in the library.
+ *
+ * @package simplesamlphp/xml-common
+ */
+class RuntimeException extends BuiltinRuntimeException
+{
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Exception/SchemaViolationException.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Exception;
+
+use SimpleSAML\Assert\AssertionFailedException;
+
+/**
+ * This exception may be raised when a violation of the SAML2 schema is detected
+ *
+ * @package simplesamlphp/xml-common
+ */
+class SchemaViolationException extends AssertionFailedException
+{
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Exception/TooManyElementsException.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Exception;
+
+/**
+ * This exception may be raised when the passed DOMElement contains too much child-elements of a certain type
+ *
+ * @package simplesamlphp/xml-common
+ */
+class TooManyElementsException extends SchemaViolationException
+{
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Exception/UnparseableXMLException.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Exception;
+
+use LibXMLError;
+
+use function sprintf;
+
+/**
+ */
+final class UnparseableXMLException extends RuntimeException
+{
+    /** @var string[] */
+    private const LEVELMAP = [
+        LIBXML_ERR_WARNING => 'WARNING',
+        LIBXML_ERR_ERROR   => 'ERROR',
+        LIBXML_ERR_FATAL   => 'FATAL',
+    ];
+
+
+    /**
+     * Constructor for UnparseableXMLException
+     *
+     * @param \LibXMLError $error
+     */
+    public function __construct(LibXMLError $error)
+    {
+        $message = sprintf(
+            'Unable to parse XML - "%s[%d]": "%s" in "%s" at line %d on column %d"',
+            self::LEVELMAP[$error->level],
+            $error->code,
+            $error->message,
+            $error->file ?: '(string)',
+            $error->line,
+            $error->column,
+        );
+
+        parent::__construct($message);
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/ExtendableAttributesTrait.php

@@ -0,0 +1,269 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use RuntimeException;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Attribute;
+use SimpleSAML\XML\Constants as C;
+use SimpleSAML\XML\XsNamespace as NS;
+
+use function array_diff;
+use function array_map;
+use function array_search;
+use function defined;
+use function implode;
+use function in_array;
+use function is_array;
+use function rtrim;
+use function sprintf;
+
+/**
+ * Trait for elements that can have arbitrary namespaced attributes.
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait ExtendableAttributesTrait
+{
+    /**
+     * Extra (namespace qualified) attributes.
+     *
+     * @var array<int, \SimpleSAML\XML\Attribute>
+     */
+    protected array $namespacedAttributes = [];
+
+
+    /**
+     * Check if a namespace-qualified attribute exists.
+     *
+     * @param string|null $namespaceURI The namespace URI.
+     * @param string $localName The local name.
+     * @return bool true if the attribute exists, false if not.
+     */
+    public function hasAttributeNS(?string $namespaceURI, string $localName): bool
+    {
+        foreach ($this->getAttributesNS() as $attr) {
+            if ($attr->getNamespaceURI() === $namespaceURI && $attr->getAttrName() === $localName) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+
+    /**
+     * Get a namespace-qualified attribute.
+     *
+     * @param string|null $namespaceURI The namespace URI.
+     * @param string $localName The local name.
+     * @return \SimpleSAML\XML\Attribute|null The value of the attribute, or null if the attribute does not exist.
+     */
+    public function getAttributeNS(?string $namespaceURI, string $localName): ?Attribute
+    {
+        foreach ($this->getAttributesNS() as $attr) {
+            if ($attr->getNamespaceURI() === $namespaceURI && $attr->getAttrName() === $localName) {
+                return $attr;
+            }
+        }
+        return null;
+    }
+
+
+    /**
+     * Get the namespaced attributes in this element.
+     *
+     * @return array<int, \SimpleSAML\XML\Attribute>
+     */
+    public function getAttributesNS(): array
+    {
+        return $this->namespacedAttributes;
+    }
+
+
+    /**
+     * Parse an XML document and get the namespaced attributes from the specified namespace(s).
+     * The namespace defaults to the XS_ANY_ATTR_NAMESPACE constant on the element.
+     * NOTE: In case the namespace is ##any, this method will also return local non-namespaced attributes!
+     *
+     * @param \DOMElement $xml
+     * @param \SimpleSAML\XML\XsNamespace|array|null $namespace
+     *
+     * @return array<int, \SimpleSAML\XML\Attribute> $attributes
+     */
+    protected static function getAttributesNSFromXML(DOMElement $xml, NS|array|null $namespace = null): array
+    {
+        $namespace = $namespace ?? self::XS_ANY_ATTR_NAMESPACE;
+        $exclusionList = self::getAttributeExclusions();
+        $attributes = [];
+
+        // Validate namespace value
+        if (!is_array($namespace)) {
+            // Must be one of the predefined values
+            Assert::oneOf($namespace, NS::cases());
+
+            foreach ($xml->attributes as $a) {
+                if (in_array([$a->namespaceURI, $a->localName], $exclusionList, true)) {
+                    continue;
+                } elseif ($namespace === NS::OTHER && in_array($a->namespaceURI, [self::NS, null], true)) {
+                    continue;
+                } elseif ($namespace === NS::TARGET && $a->namespaceURI !== self::NS) {
+                    continue;
+                } elseif ($namespace === NS::LOCAL && $a->namespaceURI !== null) {
+                    continue;
+                }
+
+                $attributes[] = new Attribute($a->namespaceURI, $a->prefix, $a->localName, $a->nodeValue);
+            }
+        } else {
+            // Array must be non-empty and cannot contain ##any or ##other
+            Assert::notEmpty($namespace);
+            Assert::allStringNotEmpty($namespace);
+            Assert::allNotSame($namespace, NS::ANY);
+            Assert::allNotSame($namespace, NS::OTHER);
+
+            // Replace the ##targetedNamespace with the actual namespace
+            if (($key = array_search(NS::TARGET, $namespace)) !== false) {
+                $namespace[$key] = self::NS;
+            }
+
+            // Replace the ##local with null
+            if (($key = array_search(NS::LOCAL, $namespace)) !== false) {
+                $namespace[$key] = null;
+            }
+
+            foreach ($xml->attributes as $a) {
+                if (in_array([$a->namespaceURI, $a->localName], $exclusionList, true)) {
+                    continue;
+                } elseif (!in_array($a->namespaceURI, $namespace, true)) {
+                    continue;
+                }
+
+                $attributes[] = new Attribute($a->namespaceURI, $a->prefix, $a->localName, $a->nodeValue);
+            }
+        }
+
+        return $attributes;
+    }
+
+
+    /**
+     * @param array<int, \SimpleSAML\XML\Attribute> $attributes
+     * @throws \SimpleSAML\Assert\AssertionFailedException if $attributes contains anything other than Attribute objects
+     */
+    protected function setAttributesNS(array $attributes): void
+    {
+        Assert::maxCount($attributes, C::UNBOUNDED_LIMIT);
+        Assert::allIsInstanceOf(
+            $attributes,
+            Attribute::class,
+            'Arbitrary XML attributes can only be an instance of Attribute.',
+        );
+        $namespace = $this->getAttributeNamespace();
+
+        // Validate namespace value
+        if (!is_array($namespace)) {
+            // Must be one of the predefined values
+            Assert::oneOf($namespace, NS::cases());
+        } else {
+            // Array must be non-empty and cannot contain ##any or ##other
+            Assert::notEmpty($namespace);
+            Assert::allNotSame($namespace, NS::ANY);
+            Assert::allNotSame($namespace, NS::OTHER);
+        }
+
+        // Get namespaces for all attributes
+        $actual_namespaces = array_map(
+            /**
+             * @param \SimpleSAML\XML\Attribute $elt
+             * @return string|null
+             */
+            function (Attribute $attr) {
+                return $attr->getNamespaceURI();
+            },
+            $attributes,
+        );
+
+        if ($namespace === NS::LOCAL) {
+            // If ##local then all namespaces must be null
+            Assert::allNull($actual_namespaces);
+        } elseif (is_array($namespace)) {
+            // Make a local copy of the property that we can edit
+            $allowed_namespaces = $namespace;
+
+            // Replace the ##targetedNamespace with the actual namespace
+            if (($key = array_search(NS::TARGET, $allowed_namespaces)) !== false) {
+                $allowed_namespaces[$key] = self::NS;
+            }
+
+            // Replace the ##local with null
+            if (($key = array_search(NS::LOCAL, $allowed_namespaces)) !== false) {
+                $allowed_namespaces[$key] = null;
+            }
+
+            $diff = array_diff($actual_namespaces, $allowed_namespaces);
+            Assert::isEmpty(
+                $diff,
+                sprintf(
+                    'Attributes from namespaces [ %s ] are not allowed inside a %s element.',
+                    rtrim(implode(', ', $diff)),
+                    self::NS,
+                ),
+            );
+        } else {
+            if ($namespace === NS::OTHER) {
+                // All attributes must be namespaced, ergo non-null
+                Assert::allNotNull($actual_namespaces);
+
+                // Must be any namespace other than the parent element
+                Assert::allNotSame($actual_namespaces, self::NS);
+            } elseif ($namespace === NS::TARGET) {
+                // Must be the same namespace as the one of the parent element
+                Assert::allSame($actual_namespaces, self::NS);
+            }
+        }
+
+        $exclusionList = self::getAttributeExclusions();
+        foreach ($attributes as $i => $attr) {
+            if (in_array([$attr->getNamespaceURI(), $attr->getAttrName()], $exclusionList, true)) {
+                unset($attributes[$i]);
+            }
+        }
+
+        $this->namespacedAttributes = $attributes;
+    }
+
+
+
+    /**
+     * @return array|\SimpleSAML\XML\XsNamespace
+     */
+    public function getAttributeNamespace(): array|NS
+    {
+        Assert::true(
+            defined('self::XS_ANY_ATTR_NAMESPACE'),
+            self::getClassName(self::class)
+            . '::XS_ANY_ATTR_NAMESPACE constant must be defined and set to the namespace for the xs:anyAttribute.',
+            RuntimeException::class,
+        );
+
+        return self::XS_ANY_ATTR_NAMESPACE;
+    }
+
+
+    /**
+     * Get the exclusions list for getAttributeNSFromXML.
+     *
+     * @return array<string, string>
+     */
+    public static function getAttributeExclusions(): array
+    {
+        if (defined('self::XS_ANY_ATTR_EXCLUSIONS')) {
+            return self::XS_ANY_ATTR_EXCLUSIONS;
+        }
+
+        return [];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/ExtendableElementTrait.php

@@ -0,0 +1,231 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use RuntimeException;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Chunk;
+use SimpleSAML\XML\Constants as C;
+use SimpleSAML\XML\Registry\ElementRegistry;
+use SimpleSAML\XML\XsNamespace as NS;
+
+use function array_diff;
+use function array_map;
+use function array_search;
+use function defined;
+use function implode;
+use function is_array;
+use function rtrim;
+use function sprintf;
+
+/**
+ * Trait grouping common functionality for elements implementing the xs:any element.
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait ExtendableElementTrait
+{
+    /** @var \SimpleSAML\XML\SerializableElementInterface[] */
+    protected array $elements = [];
+
+
+    /**
+     * Parse an XML document and get the child elements from the specified namespace(s).
+     * The namespace defaults to the XS_ANY_ELT_NAMESPACE constant on the element.
+     * NOTE: In case the namespace is ##any, this method will also return local non-namespaced elements!
+     *
+     * @param \DOMElement $xml
+     * @param \SimpleSAML\XML\XsNamespace|array|null $namespace
+     *
+     * @return list<\SimpleSAML\XML\SerializableElementInterface> $elements
+     */
+    protected static function getChildElementsFromXML(DOMElement $xml, NS|array|null $namespace = null): array
+    {
+        $namespace = $namespace ?? self::XS_ANY_ELT_NAMESPACE;
+        $exclusionList = self::getElementExclusions();
+        $registry = ElementRegistry::getInstance();
+        $elements = [];
+
+        // Validate namespace value
+        if (!is_array($namespace)) {
+            // Must be one of the predefined values
+            Assert::oneOf($namespace, NS::cases());
+
+            foreach ($xml->childNodes as $elt) {
+                if (!($elt instanceof DOMElement)) {
+                    continue;
+                } elseif (in_array([$elt->namespaceURI, $elt->localName], $exclusionList, true)) {
+                    continue;
+                } elseif ($namespace === NS::OTHER && in_array($elt->namespaceURI, [self::NS, null], true)) {
+                    continue;
+                } elseif ($namespace === NS::TARGET && $elt->namespaceURI !== self::NS) {
+                    continue;
+                } elseif ($namespace === NS::LOCAL && $elt->namespaceURI !== null) {
+                    continue;
+                }
+
+                $handler = $registry->getElementHandler($elt->namespaceURI, $elt->localName);
+                $elements[] = ($handler === null) ? Chunk::fromXML($elt) : $handler::fromXML($elt);
+            }
+        } else {
+            // Array must be non-empty and cannot contain ##any or ##other
+            Assert::notEmpty($namespace);
+            Assert::allStringNotEmpty($namespace);
+            Assert::allNotSame($namespace, NS::ANY);
+            Assert::allNotSame($namespace, NS::OTHER);
+
+            // Replace the ##targetedNamespace with the actual namespace
+            if (($key = array_search(NS::TARGET, $namespace)) !== false) {
+                $namespace[$key] = self::NS;
+            }
+
+            // Replace the ##local with null
+            if (($key = array_search(NS::LOCAL, $namespace)) !== false) {
+                $namespace[$key] = null;
+            }
+
+            foreach ($xml->childNodes as $elt) {
+                if (!($elt instanceof DOMElement)) {
+                    continue;
+                } elseif (in_array([$elt->namespaceURI, $elt->localName], $exclusionList, true)) {
+                    continue;
+                } elseif (!in_array($elt->namespaceURI, $namespace, true)) {
+                    continue;
+                }
+
+                $handler = $registry->getElementHandler($elt->namespaceURI, $elt->localName);
+                $elements[] = ($handler === null) ? Chunk::fromXML($elt) : $handler::fromXML($elt);
+            }
+        }
+
+        return $elements;
+    }
+
+
+    /**
+     * Set an array with all elements present.
+     *
+     * @param \SimpleSAML\XML\SerializableElementInterface[] $elements
+     * @return void
+     */
+    protected function setElements(array $elements): void
+    {
+        Assert::maxCount($elements, C::UNBOUNDED_LIMIT);
+        Assert::allIsInstanceOf($elements, SerializableElementInterface::class);
+        $namespace = $this->getElementNamespace();
+
+        // Validate namespace value
+        if (!is_array($namespace)) {
+            // Must be one of the predefined values
+            Assert::oneOf($namespace, NS::cases());
+        } else {
+            // Array must be non-empty and cannot contain ##any or ##other
+            Assert::notEmpty($namespace);
+            Assert::allNotSame($namespace, NS::ANY);
+            Assert::allNotSame($namespace, NS::OTHER);
+        }
+
+        // Get namespaces for all elements
+        $actual_namespaces = array_map(
+            /**
+             * @param \SimpleSAML\XML\SerializableElementInterface $elt
+             * @return string|null
+             */
+            function (SerializableElementInterface $elt) {
+                return ($elt instanceof Chunk) ? $elt->getNamespaceURI() : $elt::getNamespaceURI();
+            },
+            $elements,
+        );
+
+        if ($namespace === NS::LOCAL) {
+            // If ##local then all namespaces must be null
+            Assert::allNull($actual_namespaces);
+        } elseif (is_array($namespace)) {
+            // Make a local copy of the property that we can edit
+            $allowed_namespaces = $namespace;
+
+            // Replace the ##targetedNamespace with the actual namespace
+            if (($key = array_search(NS::TARGET, $allowed_namespaces)) !== false) {
+                $allowed_namespaces[$key] = self::NS;
+            }
+
+            // Replace the ##local with null
+            if (($key = array_search(NS::LOCAL, $allowed_namespaces)) !== false) {
+                $allowed_namespaces[$key] = null;
+            }
+
+            $diff = array_diff($actual_namespaces, $allowed_namespaces);
+            Assert::isEmpty(
+                $diff,
+                sprintf(
+                    'Elements from namespaces [ %s ] are not allowed inside a %s element.',
+                    rtrim(implode(', ', $diff)),
+                    self::NS,
+                ),
+            );
+        } elseif ($namespace === NS::OTHER) {
+            // Must be any namespace other than the parent element, excluding elements with no namespace
+            Assert::notInArray(null, $actual_namespaces);
+            Assert::allNotSame($actual_namespaces, self::NS);
+        } elseif ($namespace === NS::TARGET) {
+            // Must be the same namespace as the one of the parent element
+            Assert::allSame($actual_namespaces, self::NS);
+        } else {
+            // XS_ANY_NS_ANY
+        }
+
+        $exclusionList = self::getElementExclusions();
+        foreach ($elements as $i => $elt) {
+            if (in_array([$elt->getNamespaceURI(), $elt->getLocalName()], $exclusionList, true)) {
+                unset($elements[$i]);
+            }
+        }
+
+        $this->elements = $elements;
+    }
+
+
+    /**
+     * Get an array with all elements present.
+     *
+     * @return \SimpleSAML\XML\SerializableElementInterface[]
+     */
+    public function getElements(): array
+    {
+        return $this->elements;
+    }
+
+
+    /**
+     * @return array|\SimpleSAML\XML\XsNamespace
+     */
+    public function getElementNamespace(): array|NS
+    {
+        Assert::true(
+            defined('self::XS_ANY_ELT_NAMESPACE'),
+            self::getClassName(self::class)
+            . '::XS_ANY_ELT_NAMESPACE constant must be defined and set to the namespace for the xs:any element.',
+            RuntimeException::class,
+        );
+
+        return self::XS_ANY_ELT_NAMESPACE;
+    }
+
+
+    /**
+     * Get the exclusions list for getChildElementsFromXML.
+     *
+     * @return array<string, string>
+     */
+    public static function getElementExclusions(): array
+    {
+        if (defined('self::XS_ANY_ELT_EXCLUSIONS')) {
+            return self::XS_ANY_ELT_EXCLUSIONS;
+        }
+
+        return [];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/HexBinaryElementTrait.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\XML\Assert\Assert;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+/**
+ * Trait grouping common functionality for simple elements with hexbinary textContent
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait HexBinaryElementTrait
+{
+    use StringElementTrait;
+
+
+    /**
+     * Sanitize the content of the element.
+     *
+     * Note:  There are no processing rules for xs:hexBinary regarding whitespace. General consensus is to strip them
+     *
+     * @param string $content  The unsanitized textContent
+     * @throws \Exception on failure
+     * @return string
+     */
+    protected function sanitizeContent(string $content): string
+    {
+        return str_replace(["\f", "\r", "\n", "\t", "\v", ' '], '', $content);
+    }
+
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        // Note: content must already be sanitized before validating
+        Assert::regex(
+            $this->sanitizeContent($content),
+            '/([0-9A-F]{2})*/i',
+            SchemaViolationException::class,
+        );
+    }
+
+
+    /** @return string */
+    abstract public static function getLocalName(): string;
+
+
+    /**
+     * Create a document structure for this element
+     *
+     * @param \DOMElement|null $parent The element we should append to.
+     * @return \DOMElement
+     */
+    abstract public function instantiateParentElement(?DOMElement $parent = null): DOMElement;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/IntegerElementTrait.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+/**
+ * Trait grouping common functionality for simple elements with just some textContent
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait IntegerElementTrait
+{
+    use StringElementTrait;
+
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param int $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(/** @scrutinizer ignore-unused */ string $content): void
+    {
+        /**
+         * Perform no validation by default.
+         * Override this method on the implementing class to perform content validation.
+         */
+        Assert::numeric($content, SchemaViolationException::class);
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/LocalizedStringElementTrait.php

@@ -0,0 +1,101 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Constants as C;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\MissingAttributeException;
+
+/**
+ * Trait grouping common functionality for simple localized string elements
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait LocalizedStringElementTrait
+{
+    use StringElementTrait;
+
+    /**
+     * The language this string is on.
+     *
+     * @var string
+     */
+    protected string $language;
+
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        Assert::notEmpty($content);
+    }
+
+
+    /**
+     * Get the language this string is localized in.
+     *
+     * @return string
+     */
+    public function getLanguage(): string
+    {
+        return $this->language;
+    }
+
+
+    /**
+     * Set the language this string is localized in.
+     *
+     * @param string $language
+     */
+    protected function setLanguage(string $language): void
+    {
+        Assert::notEmpty($language, 'xml:lang cannot be empty.');
+        $this->language = $language;
+    }
+
+
+    /**
+     * Convert XML into a class instance
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   If the qualified name of the supplied element is wrong
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+        Assert::true(
+            $xml->hasAttributeNS(C::NS_XML, 'lang'),
+            'Missing xml:lang from ' . static::getLocalName(),
+            MissingAttributeException::class,
+        );
+
+        return new static($xml->getAttributeNS(C::NS_XML, 'lang'), $xml->textContent);
+    }
+
+
+    /**
+     * @param \DOMElement|null $parent
+     * @return \DOMElement
+     */
+    final public function toXML(?DOMElement $parent = null): DOMElement
+    {
+        $e = $this->instantiateParentElement($parent);
+        $e->setAttributeNS(C::NS_XML, 'xml:lang', $this->getLanguage());
+        $e->textContent = $this->getContent();
+
+        return $e;
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/QNameElementTrait.php

@@ -0,0 +1,144 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\XML\Assert\Assert;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+use SimpleSAML\XML\StringElementTrait;
+
+use function preg_split;
+
+/**
+ * Trait grouping common functionality for simple elements with QName textContent
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait QNameElementTrait
+{
+    use StringElementTrait;
+
+    /** @var string|null */
+    protected ?string $contentNamespaceUri;
+
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        Assert::validQName($content, SchemaViolationException::class);
+    }
+
+
+    /**
+     * Set the namespaceUri.
+     *
+     * @param string|null $namespaceUri
+     */
+    protected function setContentNamespaceUri(?string $namespaceUri): void
+    {
+        Assert::nullOrValidURI($namespaceUri, SchemaViolationException::class);
+        $this->contentNamespaceUri = $namespaceUri;
+    }
+
+
+    /**
+     * Get the namespace URI.
+     *
+     * @return string|null
+     */
+    public function getContentNamespaceUri(): ?string
+    {
+        return $this->contentNamespaceUri;
+    }
+
+
+    /**
+     * Splits a QName into an array holding the prefix (or null if no prefix is available) and the localName
+     *
+     * @param string $qName  The qualified name
+     * @return array
+     */
+    private static function parseQName(string $qName): array
+    {
+        Assert::validQName($qName);
+
+        @list($prefix, $localName) = preg_split('/:/', $qName, 2);
+        if ($localName === null) {
+            $prefix = null;
+            $localName = $qName;
+        }
+
+        Assert::nullOrValidNCName($prefix);
+        Assert::validNCName($localName);
+
+        return [$prefix, $localName];
+    }
+
+
+    /**
+     * Convert XML into a class instance
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   If the qualified name of the supplied element is wrong
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+
+        list($prefix, $localName) = self::parseQName($xml->textContent);
+        $namespace = $xml->lookupNamespaceUri($prefix);
+
+        return new static($xml->textContent, $namespace);
+    }
+
+
+    /**
+     * Convert this element to XML.
+     *
+     * @param \DOMElement|null $parent The element we should append this element to.
+     * @return \DOMElement
+     */
+    public function toXML(?DOMElement $parent = null): DOMElement
+    {
+        $e = $this->instantiateParentElement($parent);
+
+        list($prefix, $localName) = self::parseQName($this->getContent());
+        $namespaceUri = $this->getContentNamespaceUri();
+        if ($namespaceUri !== null && $prefix !== null) {
+            if ($e->lookupNamespaceUri($prefix) === null && $e->lookupPrefix($namespaceUri) === null) {
+                // The namespace is not yet available in the document - insert it
+                $e->setAttribute('xmlns:' . $prefix, $namespaceUri);
+            }
+        }
+
+        $e->textContent = ($prefix === null) ? $localName : ($prefix . ':' . $localName);
+
+        return $e;
+    }
+
+
+    /** @return string */
+    abstract public static function getLocalName(): string;
+
+
+    /**
+     * Create a document structure for this element
+     *
+     * @param \DOMElement|null $parent The element we should append to.
+     * @return \DOMElement
+     */
+    abstract public function instantiateParentElement(?DOMElement $parent = null): DOMElement;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Registry/ElementRegistry.php

@@ -0,0 +1,97 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Registry;
+
+use SimpleSAML\XML\AbstractElement;
+use SimpleSAML\XML\Assert\Assert;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\IOException;
+use Symfony\Component\Finder\Finder;
+
+use function array_merge_recursive;
+use function dirname;
+use function file_exists;
+
+final class ElementRegistry
+{
+    /** @var \SimpleSAML\XML\Registry\ElementRegistry|null $instance */
+    private static ?ElementRegistry $instance = null;
+
+    /** @var array<string, array<string, string>> */
+    private array $registry = [];
+
+
+    private function __construct()
+    {
+        // Initialize the registry with all the elements we know
+        $classesDir = dirname(__FILE__, 6) . '/vendor/simplesamlphp/composer-xmlprovider-installer/classes';
+
+        if (file_exists($classesDir) === true) {
+            $finder = Finder::create()->files()->name('element.registry.*.php')->in($classesDir);
+            if ($finder->hasResults()) {
+                foreach ($finder as $file) {
+                    $this->importFromFile($file->getPathName());
+                }
+            }
+        }
+    }
+
+
+    public function importFromFile(string $file): void
+    {
+        if (file_exists($file) === true) {
+            $elements = include($file);
+            $this->registry = array_merge_recursive($this->registry, $elements);
+        } else {
+            throw new IOException('File not found.');
+        }
+    }
+
+
+    public static function getInstance(): ElementRegistry
+    {
+        if (self::$instance === null) {
+            self::$instance = new static();
+        }
+
+        return self::$instance;
+    }
+
+
+    /**
+     * Register a class that can process a certain XML-element.
+     *
+     * @param string $class The class name of a class extending AbstractElement.
+     */
+    public function registerElementHandler(string $class): void
+    {
+        Assert::subclassOf($class, AbstractElement::class);
+        $className = AbstractElement::getClassName($class);
+        $namespace = $class::NS;
+
+        $this->registry[$namespace][$className] = $class;
+    }
+
+
+    /**
+     * Search for a class that implements an $element in the given $namespace.
+     *
+     * Such classes must have been registered previously by calling registerElementHandler(), and they must
+     * extend \SimpleSAML\XML\AbstractElement.
+     *
+     * @param string|null $namespace The namespace URI for the given element.
+     * @param string $element The local name of the element.
+     *
+     * @return string|null The fully-qualified name of a class extending \SimpleSAML\XML\AbstractElement and
+     * implementing support for the given element, or null if no such class has been registered before.
+     */
+    public function getElementHandler(?string $namespace, string $element): ?string
+    {
+        Assert::nullOrValidURI($namespace, InvalidDOMElementException::class);
+        Assert::validNCName($element, InvalidDOMElementException::class);
+
+        return $this->registry[$namespace][$element] ?? null;
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/SchemaValidatableElementInterface.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMDocument;
+
+/**
+ * interface class to be implemented by all the classes that can be validated against a schema
+ *
+ * @package simplesamlphp/xml-common
+ */
+interface SchemaValidatableElementInterface extends ElementInterface
+{
+    /**
+     * Validate the given DOMDocument against the schema set for this element
+     *
+     * @param \DOMDocument $document
+     * @param string|null $schemaFile
+     * @return \DOMDocument
+     *
+     * @throws \SimpleSAML\XML\Exception\IOException
+     * @throws \SimpleSAML\XML\Exception\SchemaViolationException
+     */
+    public static function schemaValidate(DOMDocument $document, ?string $schemaFile = null): DOMDocument;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/SchemaValidatableElementTrait.php

@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMDocument;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\IOException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+use function array_unique;
+use function defined;
+use function file_exists;
+use function implode;
+use function libxml_clear_errors;
+use function libxml_get_errors;
+use function libxml_use_internal_errors;
+use function sprintf;
+use function trim;
+
+/**
+ * trait class to be used by all the classes that implement the SchemaValidatableElementInterface
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait SchemaValidatableElementTrait
+{
+    /**
+     * Validate the given DOMDocument against the schema set for this element
+     *
+     * @param \DOMDocument $document
+     * @param string|null $schemaFile
+     * @return \DOMDocument
+     *
+     * @throws \SimpleSAML\XML\Exception\IOException
+     * @throws \SimpleSAML\XML\Exception\SchemaViolationException
+     */
+    public static function schemaValidate(DOMDocument $document, ?string $schemaFile = null): DOMDocument
+    {
+        $internalErrors = libxml_use_internal_errors(true);
+        libxml_clear_errors();
+
+        if ($schemaFile === null) {
+            $schemaFile = self::getSchemaFile();
+        }
+
+        // Must suppress the warnings here in order to throw them as an error below.
+        $result = @$document->schemaValidate($schemaFile);
+
+        if ($result === false) {
+            $msgs = [];
+            foreach (libxml_get_errors() as $err) {
+                $msgs[] = trim($err->message) . ' on line ' . $err->line;
+            }
+
+            throw new SchemaViolationException(sprintf(
+                "XML schema validation errors:\n - %s",
+                implode("\n - ", array_unique($msgs)),
+            ));
+        }
+
+        libxml_use_internal_errors($internalErrors);
+        libxml_clear_errors();
+
+        return $document;
+    }
+
+
+    /**
+     * Get the schema file that can validate this element.
+     * The path must be relative to the project's base directory.
+     *
+     * @return string
+     */
+    public static function getSchemaFile(): string
+    {
+        if (defined('static::SCHEMA')) {
+            $schemaFile = static::SCHEMA;
+        }
+
+        Assert::true(file_exists($schemaFile), sprintf("File not found: %s", $schemaFile), IOException::class);
+        return $schemaFile;
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/SerializableElementInterface.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+
+/**
+ * interface class to be implemented by all the classes that represent a serializable XML element
+ *
+ * @package simplesamlphp/xml-common
+ */
+interface SerializableElementInterface extends ElementInterface
+{
+    /**
+     * Output the class as an XML-formatted string
+     *
+     * @return string
+     */
+    public function __toString(): string;
+
+
+    /**
+     * Test if an object, at the state it's in, would produce an empty XML-element
+     *
+     * @return bool
+     */
+    public function isEmptyElement(): bool;
+
+
+    /**
+     * Create a class from XML
+     *
+     * @param \DOMElement $xml
+     * @return static
+     */
+    public static function fromXML(DOMElement $xml): static;
+
+
+    /**
+     * Create XML from this class
+     *
+     * @param \DOMElement|null $parent
+     * @return \DOMElement
+     */
+    public function toXML(?DOMElement $parent = null): DOMElement;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/SerializableElementTrait.php

@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\XML\DOMDocumentFactory;
+
+use function array_pop;
+use function get_object_vars;
+
+/**
+ * Trait grouping common functionality for elements implementing the SerializableElement element.
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait SerializableElementTrait
+{
+    /**
+     * Whether to format the string output of this element or not.
+     *
+     * Defaults to true. Override to disable output formatting.
+     *
+     * @var bool
+     */
+    protected bool $formatOutput = true;
+
+
+    /**
+     * Output the class as an XML-formatted string
+     *
+     * @return string
+     */
+    public function __toString(): string
+    {
+        $xml = $this->toXML();
+
+        $xmlString = $xml->ownerDocument->saveXML();
+
+        $doc = DOMDocumentFactory::fromString($xmlString);
+        $doc->formatOutput = $this->formatOutput;
+
+        return $doc->saveXML($doc->firstChild);
+    }
+
+
+    /**
+     * Serialize this XML chunk.
+     *
+     * This method will be invoked by any calls to serialize().
+     *
+     * @return array{0: string} The serialized representation of this XML object.
+     */
+    public function __serialize(): array
+    {
+        $xml = $this->toXML();
+        return [$xml->ownerDocument->saveXML($xml)];
+    }
+
+
+    /**
+     * Unserialize an XML object and load it..
+     *
+     * This method will be invoked by any calls to unserialize(), allowing us to restore any data that might not
+     * be serializable in its original form (e.g.: DOM objects).
+     *
+     * @param array{0: string} $serialized The XML object that we want to restore.
+     */
+    public function __unserialize(array $serialized): void
+    {
+        $xml = static::fromXML(
+            DOMDocumentFactory::fromString(array_pop($serialized))->documentElement,
+        );
+
+        $vars = get_object_vars($xml);
+        foreach ($vars as $k => $v) {
+            $this->$k = $v;
+        }
+    }
+
+
+    /**
+     * Create XML from this class
+     *
+     * @param \DOMElement|null $parent
+     * @return \DOMElement
+     */
+    abstract public function toXML(?DOMElement $parent = null): DOMElement;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/StringElementTrait.php

@@ -0,0 +1,135 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+
+/**
+ * Trait grouping common functionality for simple elements with just some textContent
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait StringElementTrait
+{
+    /** @var string */
+    protected string $content;
+
+
+    /**
+     * Set the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     */
+    protected function setContent(string $content): void
+    {
+        $this->validateContent($content);
+        $this->content = $content;
+    }
+
+
+    /**
+     * Get the content of the element.
+     *
+     * @return string
+     */
+    public function getContent(): string
+    {
+        return $this->sanitizeContent($this->getRawContent());
+    }
+
+
+    /**
+     * Get the raw content of the element.
+     *
+     * @return string
+     */
+    public function getRawContent(): string
+    {
+        return $this->content;
+    }
+
+
+    /**
+     * Sanitize the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return string
+     */
+    protected function sanitizeContent(string $content): string
+    {
+        /**
+         * Perform no sanitation by default.
+         * Override this method on the implementing class to perform content sanitation.
+         */
+        return $content;
+    }
+
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(/** @scrutinizer ignore-unused */ string $content): void
+    {
+        /**
+         * Perform no validation by default.
+         * Override this method on the implementing class to perform content validation.
+         */
+    }
+
+
+    /**
+     * Convert XML into a class instance
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   If the qualified name of the supplied element is wrong
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+
+        return new static($xml->textContent);
+    }
+
+
+    /**
+     * Convert this element to XML.
+     *
+     * @param \DOMElement|null $parent The element we should append this element to.
+     * @return \DOMElement
+     */
+    public function toXML(?DOMElement $parent = null): DOMElement
+    {
+        $e = $this->instantiateParentElement($parent);
+        $e->textContent = $this->getContent();
+
+        return $e;
+    }
+
+
+    /**
+     * @return string
+     */
+    abstract public static function getLocalName(): string;
+
+
+    /**
+     * Create a document structure for this element
+     *
+     * @param \DOMElement|null $parent The element we should append to.
+     * @return \DOMElement
+     */
+    abstract public function instantiateParentElement(?DOMElement $parent = null): DOMElement;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/TestUtils/ArrayizableElementTestTrait.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\TestUtils;
+
+use function class_exists;
+
+/**
+ * Test for arrayizable XML classes to perform default serialization tests.
+ *
+ * @package simplesamlphp\xml-common
+ */
+trait ArrayizableElementTestTrait
+{
+    /** @var class-string */
+    protected static string $testedClass;
+
+    /** @var array */
+    protected static array $arrayRepresentation;
+
+
+    /**
+     * Test arrayization / de-arrayization
+     */
+    public function testArrayization(): void
+    {
+        if (!class_exists(self::$testedClass)) {
+            $this->markTestSkipped(
+                'Unable to run ' . self::class . '::testArrayization(). Please set ' . self::class
+                . ':$element to a class-string representing the XML-class being tested',
+            );
+        } elseif (self::$arrayRepresentation === null) {
+            $this->markTestSkipped(
+                'Unable to run ' . self::class . '::testArrayization(). Please set ' . self::class
+                . ':$arrayRepresentation to an array representing the XML-class being tested',
+            );
+        } else {
+            $this->assertEquals(
+                self::$arrayRepresentation,
+                self::$testedClass::fromArray(self::$arrayRepresentation)->toArray(),
+            );
+        }
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/TestUtils/SchemaValidationTestTrait.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\TestUtils;
+
+use DOMDocument;
+use PHPUnit\Framework\Attributes\Depends;
+
+use function class_exists;
+
+/**
+ * Test for AbstractElement classes to perform schema validation tests.
+ *
+ * @package simplesamlphp\xml-common
+ */
+trait SchemaValidationTestTrait
+{
+    /** @var string|null */
+    protected static ?string $schemaFile = null;
+
+    /** @var class-string */
+    protected static string $testedClass;
+
+    /** @var \DOMDocument */
+    protected static DOMDocument $xmlRepresentation;
+
+
+    /**
+     * Test schema validation.
+     */
+    #[Depends('testSerialization')]
+    public function testSchemaValidation(): void
+    {
+        if (!class_exists(self::$testedClass)) {
+            $this->markTestSkipped(
+                'Unable to run ' . self::class . '::testSchemaValidation(). Please set ' . self::class
+                . ':$testedClass to a class-string representing the XML-class being tested',
+            );
+        } elseif (empty(self::$xmlRepresentation)) {
+            $this->markTestSkipped(
+                'Unable to run ' . self::class . '::testSchemaValidation(). Please set ' . self::class
+                . ':$xmlRepresentation to a DOMDocument representing the XML-class being tested',
+            );
+        } else {
+            // Validate before serialization
+            self::$testedClass::schemaValidate(self::$xmlRepresentation, self::$schemaFile);
+
+            // Perform serialization
+            $class = self::$testedClass::fromXML(self::$xmlRepresentation->documentElement);
+            $serializedClass = $class->toXML();
+
+            // Validate after serialization
+            self::$testedClass::schemaValidate($serializedClass->ownerDocument, self::$schemaFile);
+
+            // If we got this far and no exceptions were thrown, consider this test passed!
+            $this->addToAssertionCount(1);
+        }
+    }
+
+    abstract public function testSerialization(): void;
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/TestUtils/SerializableElementTestTrait.php

@@ -0,0 +1,82 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\TestUtils;
+
+use DOMDocument;
+use PHPUnit\Framework\Attributes\Depends;
+
+use function class_exists;
+
+/**
+ * Test for Serializable XML classes to perform default serialization tests.
+ *
+ * @package simplesamlphp\xml-common
+ */
+trait SerializableElementTestTrait
+{
+    /** @var class-string */
+    protected static string $testedClass;
+
+    /** @var \DOMDocument */
+    protected static DOMDocument $xmlRepresentation;
+
+
+    /**
+     * Test creating XML from a class.
+     */
+    abstract public function testMarshalling(): void;
+
+
+    /**
+     * Test creating a class from XML.
+     */
+    public function testUnmarshalling(): void
+    {
+        if (!class_exists(self::$testedClass)) {
+            $this->markTestSkipped(
+                'Unable to run ' . self::class . '::testUnmarshalling(). Please set ' . self::class
+                . ':$testedClass to a class-string representing the XML-class being tested',
+            );
+        } elseif (empty(self::$xmlRepresentation)) {
+            $this->markTestSkipped(
+                'Unable to run ' . self::class . '::testUnmarshalling(). Please set ' . self::class
+                . ':$xmlRepresentation to a DOMDocument representing the XML-class being tested',
+            );
+        } else {
+            $elt = self::$testedClass::fromXML(self::$xmlRepresentation->documentElement);
+
+            $this->assertEquals(
+                self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
+                strval($elt),
+            );
+        }
+    }
+
+
+    /**
+     * Test serialization / unserialization.
+     */
+    #[Depends('testMarshalling')]
+    #[Depends('testUnmarshalling')]
+    public function testSerialization(): void
+    {
+        if (!class_exists(self::$testedClass)) {
+            $this->markTestSkipped(
+                'Unable to run ' . self::class . '::testSerialization(). Please set ' . self::class
+                . ':$testedClass to a class-string representing the XML-class being tested',
+            );
+        } elseif (empty(self::$xmlRepresentation)) {
+            $this->markTestSkipped(
+                'Unable to run ' . self::class . '::testSerialization(). Please set ' . self::class
+                . ':$xmlRepresentation to a DOMDocument representing the XML-class being tested',
+            );
+        } else {
+            $this->assertEquals(
+                self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
+                strval(unserialize(serialize(self::$testedClass::fromXML(self::$xmlRepresentation->documentElement)))),
+            );
+        }
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/URIElementTrait.php

@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DOMElement;
+use SimpleSAML\Assert\Assert;
+use SimpleSAML\XML\Exception\InvalidDOMElementException;
+use SimpleSAML\XML\Exception\SchemaViolationException;
+
+/**
+ * Trait grouping common functionality for simple URI string elements
+ *
+ * @package simplesamlphp/xml-common
+ */
+trait URIElementTrait
+{
+    use StringElementTrait;
+
+    /**
+     * Validate the content of the element.
+     *
+     * @param string $content  The value to go in the XML textContent
+     * @throws \Exception on failure
+     * @return void
+     */
+    protected function validateContent(string $content): void
+    {
+        Assert::validURI($content, SchemaViolationException::class);
+    }
+
+
+    /**
+     * Convert XML into a class instance
+     *
+     * @param \DOMElement $xml The XML element we should load
+     * @return static
+     *
+     * @throws \SimpleSAML\XML\Exception\InvalidDOMElementException
+     *   If the qualified name of the supplied element is wrong
+     */
+    public static function fromXML(DOMElement $xml): static
+    {
+        Assert::same($xml->localName, static::getLocalName(), InvalidDOMElementException::class);
+        Assert::same($xml->namespaceURI, static::NS, InvalidDOMElementException::class);
+
+        return new static($xml->textContent);
+    }
+
+
+    /**
+     * @param \DOMElement|null $parent
+     * @return \DOMElement
+     */
+    final public function toXML(?DOMElement $parent = null): DOMElement
+    {
+        $e = $this->instantiateParentElement($parent);
+        $e->textContent = $this->getContent();
+
+        return $e;
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Utils.php

@@ -0,0 +1,166 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+use DateTimeImmutable;
+use DateTimeInterface;
+use DOMElement;
+use SimpleSAML\XML\Assert\Assert;
+
+use function trim;
+
+/**
+ * Helper functions for the XML library.
+ *
+ * @package simplesamlphp/xml-common
+ */
+class Utils
+{
+    /**
+     * @deprecated Create elements that extend AbstractElement and use it's interface to retrieve attributes instead.
+     *
+     * Extract localized strings from a set of nodes.
+     *
+     * @param \DOMElement $parent The element that contains the localized strings.
+     * @param string $namespaceURI The namespace URI the localized strings should have.
+     * @param string $localName The localName of the localized strings.
+     * @return array<string, string> Localized strings.
+     */
+    public static function extractLocalizedStrings(DOMElement $parent, string $namespaceURI, string $localName): array
+    {
+        $ret = [];
+        foreach ($parent->childNodes as $node) {
+            if ($node->namespaceURI !== $namespaceURI || $node->localName !== $localName) {
+                continue;
+            } elseif (!($node instanceof DOMElement)) {
+                continue;
+            }
+
+            if ($node->hasAttribute('xml:lang')) {
+                $language = $node->getAttribute('xml:lang');
+            } else {
+                $language = 'en';
+            }
+            $ret[$language] = trim($node->textContent);
+        }
+
+        return $ret;
+    }
+
+
+    /**
+     * @deprecated Create elements that extend AbstractElement and use <element>::getChildrenOfClass() instead.
+     *
+     * Extract strings from a set of nodes.
+     *
+     * @param \DOMElement $parent The element that contains the localized strings.
+     * @param string $namespaceURI The namespace URI the string elements should have.
+     * @param string $localName The localName of the string elements.
+     * @return string[] The string values of the various nodes.
+     */
+    public static function extractStrings(DOMElement $parent, string $namespaceURI, string $localName): array
+    {
+        $ret = [];
+        foreach ($parent->childNodes as $node) {
+            if ($node->namespaceURI !== $namespaceURI || $node->localName !== $localName) {
+                continue;
+            }
+            $ret[] = trim($node->textContent);
+        }
+
+        return $ret;
+    }
+
+
+    /**
+     * @deprecated Create elements that extend AbstractElement and use <element>::toXML() instead.
+     *
+     * Append string element.
+     *
+     * @param \DOMElement $parent The parent element we should append the new nodes to.
+     * @param string $namespace The namespace of the created element.
+     * @param string $name The name of the created element.
+     * @param string $value The value of the element.
+     * @return \DOMElement The generated element.
+     */
+    public static function addString(
+        DOMElement $parent,
+        string $namespace,
+        string $name,
+        string $value,
+    ): DOMElement {
+        $doc = $parent->ownerDocument;
+        Assert::notNull($doc);
+
+        $n = $doc->createElementNS($namespace, $name);
+        $n->appendChild($doc->createTextNode($value));
+        $parent->appendChild($n);
+
+        return $n;
+    }
+
+
+    /**
+     * @deprecated Create elements that extend AbstractElement and use <element>::toXML() instead.
+     *
+     * Append string elements.
+     *
+     * @param \DOMElement $parent The parent element we should append the new nodes to.
+     * @param string $namespace The namespace of the created elements
+     * @param string $name The name of the created elements
+     * @param bool $localized Whether the strings are localized, and should include the xml:lang attribute.
+     * @param string[] $values The values we should create the elements from.
+     */
+    public static function addStrings(
+        DOMElement $parent,
+        string $namespace,
+        string $name,
+        bool $localized,
+        array $values,
+    ): void {
+        $doc = $parent->ownerDocument;
+        Assert::notNull($doc);
+
+        foreach ($values as $index => $value) {
+            $n = $doc->createElementNS($namespace, $name);
+            $n->appendChild($doc->createTextNode($value));
+            if ($localized) {
+                $n->setAttribute('xml:lang', $index);
+            }
+            $parent->appendChild($n);
+        }
+    }
+
+
+    /**
+     * @deprecated Use DateTime objects instead
+     *
+     * This function converts a SAML2 timestamp on the form
+     * yyyy-mm-ddThh:mm:ss(\.s+)?Z to a UNIX timestamp. The sub-second
+     * part is ignored.
+     *
+     * Note that we always require a 'Z' timezone for the dateTime to be valid.
+     * This is not in the SAML spec but that's considered to be a bug in the
+     * spec. See https://github.com/simplesamlphp/saml2/pull/36 for some
+     * background.
+     *
+     * @param string $time The time we should convert.
+     * @throws \Exception
+     * @return int Converted to a unix timestamp.
+     */
+    public static function xsDateTimeToTimestamp(string $time): int
+    {
+        Assert::validDateTime($time);
+
+        $dateTime1 = DateTimeImmutable::createFromFormat(DateTimeInterface::ISO8601, $time);
+        $dateTime2 = DateTimeImmutable::createFromFormat(DateTimeInterface::RFC3339_EXTENDED, $time);
+
+        $dateTime = $dateTime1 ?: $dateTime2;
+        Assert::isInstanceOf($dateTime, DateTimeImmutable::class);
+        Assert::same($dateTime->getTimeZone()->getName(), 'Z');
+
+        return $dateTime->getTimestamp();
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Utils/Random.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Utils;
+
+use function bin2hex;
+use function random_bytes;
+
+/**
+ * @package simplesamlphp/xml-common
+ */
+class Random
+{
+    /**
+     * The fixed length of random identifiers.
+     */
+    public const ID_LENGTH = 43;
+
+    /**
+     * This function will generate a unique ID that is valid for use
+     * in an xs:ID attribute
+     */
+    public function generateID(): string
+    {
+        return '_' . bin2hex(random_bytes((self::ID_LENGTH - 1) / 2));
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/Utils/XPath.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML\Utils;
+
+use DOMDocument;
+use DOMNode;
+use DOMXPath;
+use SimpleSAML\Assert\Assert;
+
+/**
+ * XPath helper functions for the XML library.
+ *
+ * @package simplesamlphp/xml-common
+ */
+class XPath
+{
+    /**
+     * Get an instance of DOMXPath associated with a DOMNode
+     *
+     * @param \DOMNode $node The associated node
+     * @return \DOMXPath
+     */
+    public static function getXPath(DOMNode $node): DOMXPath
+    {
+        static $xpCache = null;
+
+        if ($node instanceof DOMDocument) {
+            $doc = $node;
+        } else {
+            $doc = $node->ownerDocument;
+            Assert::notNull($doc);
+        }
+
+        if ($xpCache === null || !$xpCache->document->isSameNode($doc)) {
+            $xpCache = new DOMXPath($doc);
+        }
+
+        return $xpCache;
+    }
+
+    /**
+     * Do an XPath query on an XML node.
+     *
+     * @param \DOMNode $node  The XML node.
+     * @param string $query The query.
+     * @param \DOMXPath $xpCache The DOMXPath object
+     * @return array<int<0, max>, \DOMNameSpaceNode|\DOMNode|null> Array with matching DOM nodes.
+     */
+    public static function xpQuery(DOMNode $node, string $query, DOMXPath $xpCache): array
+    {
+        $ret = [];
+
+        $results = $xpCache->query($query, $node);
+        for ($i = 0; $i < $results->length; $i++) {
+            $ret[$i] = $results->item($i);
+        }
+
+        return $ret;
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/XsNamespace.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+/**
+ * The namespace-attribute values for xs:any elements
+ *
+ * @package simplesamlphp/xml-common
+ */
+enum XsNamespace: string
+{
+    case ANY = '##any';
+    case LOCAL = '##local';
+    case OTHER = '##other';
+    case TARGET = '##targetNamespace';
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/src/XsProcess.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XML;
+
+/**
+ * The processContents-attribute values for xs:any elements
+ *
+ * @package simplesamlphp/xml-common
+ */
+enum XsProcess: string
+{
+    case LAX = 'lax';
+    case SKIP = 'skip';
+    case STRICT = 'strict';
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/Assert/DateTimeTest.php

@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML\Assert;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\Assert\Assert;
+
+/**
+ * Class \SimpleSAML\Test\XML\Assert\DateTimeTest
+ *
+ * @package simplesamlphp/xml-common
+ */
+#[CoversClass(Assert::class)]
+final class DateTimeTest extends TestCase
+{
+    /**
+     * @param boolean $shouldPass
+     * @param string $dateTime
+     */
+    #[DataProvider('provideDateTime')]
+    public function testValidDateTime(bool $shouldPass, string $dateTime): void
+    {
+        try {
+            Assert::validDateTime($dateTime);
+            $this->assertTrue($shouldPass);
+        } catch (AssertionFailedException $e) {
+            $this->assertFalse($shouldPass);
+        }
+    }
+
+
+    /**
+     * @return array<int, array{0: bool, 1: string}>
+     */
+    public static function provideDateTime(): array
+    {
+        return [
+            [true, '2001-10-26T21:32:52'],
+            [true, '2001-10-26T21:32:52+02:00'],
+            [true, '2001-10-26T19:32:52Z'],
+            [true, '2001-10-26T19:32:52+00:00'],
+            [true, '-2001-10-26T21:32:52'],
+            [true, '2001-10-26T21:32:52.12679'],
+            [false, '2001-10-26'],
+            [false, '2001-10-26T21:32'],
+            [false, '2001-10-26T25:32:52+02:00'],
+            [false, '01-10-26T21:32'],
+        ];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/Assert/DurationTest.php

@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML\Assert;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\Assert\Assert;
+
+/**
+ * Class \SimpleSAML\Test\XML\Assert\DurationTest
+ *
+ * @package simplesamlphp/xml-common
+ */
+#[CoversClass(Assert::class)]
+final class DurationTest extends TestCase
+{
+    /**
+     * @param boolean $shouldPass
+     * @param string $duration
+     */
+    #[DataProvider('provideDuration')]
+    public function testValidDuration(bool $shouldPass, string $duration): void
+    {
+        try {
+            Assert::validDuration($duration);
+            $this->assertTrue($shouldPass);
+        } catch (AssertionFailedException $e) {
+            $this->assertFalse($shouldPass);
+        }
+    }
+
+
+    /**
+     * @return array<int, array{0: bool, 1: string}>
+     */
+    public static function provideDuration(): array
+    {
+        return [
+            [true, 'P2Y6M5DT12H35M30S'],
+            [true, 'P1DT2H'],
+            [true, 'P1W'],
+            [true, 'P20M'],
+            [true, 'PT20M'],
+            [true, 'P0Y20M0D'],
+            [true, 'P0Y'],
+            [true, '-P60D'],
+            [true, 'PT1M30.5S'],
+            [true, 'P15.5Y'],
+            [true, 'P15,5Y'],
+            [false, 'P-20M'],
+            [false, 'P20MT'],
+            [false, 'P1YM5D'],
+            [false, 'P1D2H'],
+            [false, '1Y2M'],
+            [false, 'P2M1Y'],
+            [false, 'P'],
+            [false, 'PT15.S'],
+            // Trailing newlines are forbidden
+            [false, "P20M\n"],
+        ];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/Assert/HexBinaryTest.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML\Assert;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\Assert\Assert;
+
+/**
+ * Class \SimpleSAML\Test\Assert\HexBinaryTest
+ *
+ * @package simplesamlphp/xml-common
+ */
+#[CoversClass(Assert::class)]
+final class HexBinaryTest extends TestCase
+{
+    /**
+     * @param boolean $shouldPass
+     * @param string $name
+     */
+    #[DataProvider('provideHexBinary')]
+    public function testHexBinary(bool $shouldPass, string $name): void
+    {
+        try {
+            Assert::validHexBinary($name);
+            $this->assertTrue($shouldPass);
+        } catch (AssertionFailedException $e) {
+            $this->assertFalse($shouldPass);
+        }
+    }
+
+
+    /**
+     * @return array<string, array{0: bool, 1: string}>
+     */
+    public static function provideHexBinary(): array
+    {
+        return [
+            'empty' => [false, ''],
+            'base64' => [false, 'U2ltcGxlU0FNTHBocA=='],
+            'valid' => [true, '3f3c6d78206c657673726f693d6e3122302e20226e656f636964676e223d54552d4622383e3f'],
+            'invalid' => [false, '3f3r'],
+            'bogus' => [false, '&*$(#&^@!(^%$'],
+            'length not dividable by 4' => [false, '3f3'],
+        ];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/Assert/NCNameTest.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML\Assert;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\Assert\Assert;
+
+/**
+ * Class \SimpleSAML\Test\XML\Assert\NCNameTest
+ *
+ * @package simplesamlphp/xml-common
+ */
+#[CoversClass(Assert::class)]
+final class NCNameTest extends TestCase
+{
+    /**
+     * @param boolean $shouldPass
+     * @param string $name
+     */
+    #[DataProvider('provideNCName')]
+    public function testValidNCName(bool $shouldPass, string $name): void
+    {
+        try {
+            Assert::validNCName($name);
+            $this->assertTrue($shouldPass);
+        } catch (AssertionFailedException $e) {
+            $this->assertFalse($shouldPass);
+        }
+    }
+
+
+    /**
+     * @return array<int, array{0: bool, 1: string}>
+     */
+    public static function provideNCName(): array
+    {
+        return [
+            [true, 'Test'],
+            [true, '_Test'],
+            // Prefixed v4 UUID
+            [true, '_5425e58e-e799-4884-92cc-ca64ecede32f'],
+            // An empty value is not valid, unless xsi:nil is used
+            [false, ''],
+            [false, 'Te*st'],
+            [false, '1Test'],
+            [false, 'Te:st'],
+            // Trailing newlines are forbidden
+            [false, "Test\n"],
+        ];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/Assert/NMTokenTest.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML\Assert;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\Assert\Assert;
+
+/**
+ * Class \SimpleSAML\Test\XML\Assert\NMTokenTest
+ *
+ * @package simplesamlphp/xml-common
+ */
+#[CoversClass(Assert::class)]
+final class NMTokenTest extends TestCase
+{
+    /**
+     * @param boolean $shouldPass
+     * @param string $nmtoken
+     */
+    #[DataProvider('provideNMToken')]
+    public function testValidToken(bool $shouldPass, string $nmtoken): void
+    {
+        try {
+            Assert::validNMToken($nmtoken);
+            $this->assertTrue($shouldPass);
+        } catch (AssertionFailedException $e) {
+            $this->assertFalse($shouldPass);
+        }
+    }
+
+
+    /**
+     * @return array<int, array{0: bool, 1: string}>
+     */
+    public static function provideNMToken(): array
+    {
+        return [
+            [true, 'Snoopy'],
+            [true, 'CMS'],
+            [true, 'fööbár'],
+            [true, '1950-10-04'],
+            [true, '0836217462'],
+            // Spaces are forbidden
+            [false, 'foo bar'],
+            // Commas are forbidden
+            [false, 'foo,bar'],
+            // Trailing newlines are forbidden
+            [false, "foobar\n"],
+        ];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/Assert/NMTokensTest.php

@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML\Assert;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\Assert\Assert;
+
+/**
+ * Class \SimpleSAML\Test\XML\Assert\NMTokensTest
+ *
+ * @package simplesamlphp/xml-common
+ */
+#[CoversClass(Assert::class)]
+final class NMTokensTest extends TestCase
+{
+    /**
+     * @param boolean $shouldPass
+     * @param string $nmtokens
+     */
+    #[DataProvider('provideNMTokens')]
+    public function testValidTokens(bool $shouldPass, string $nmtokens): void
+    {
+        try {
+            Assert::validNMTokens($nmtokens);
+            $this->assertTrue($shouldPass);
+        } catch (AssertionFailedException $e) {
+            $this->assertFalse($shouldPass);
+        }
+    }
+
+
+    /**
+     * @return array<int, array{0: bool, 1: string}>
+     */
+    public static function provideNMTokens(): array
+    {
+        return [
+            [true, 'Snoopy'],
+            [true, 'CMS'],
+            [true, 'fööbár'],
+            [true, '1950-10-04'],
+            [true, '0836217462 0836217463'],
+            [true, 'foo bar'],
+            // Quotes are forbidden
+            [false, 'foo "bar" baz'],
+            // Commas are forbidden
+            [false, 'foo,bar'],
+            // Trailing newlines are forbidden
+            [false, "foobar\n"],
+        ];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/Assert/QNameTest.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML\Assert;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\Assert\AssertionFailedException;
+use SimpleSAML\XML\Assert\Assert;
+
+/**
+ * Class \SimpleSAML\Test\XML\Assert\QNameTest
+ *
+ * @package simplesamlphp/xml-common
+ */
+#[CoversClass(Assert::class)]
+final class QNameTest extends TestCase
+{
+    /**
+     * @param boolean $shouldPass
+     * @param string $name
+     */
+    #[DataProvider('provideQName')]
+    public function testValidQName(bool $shouldPass, string $name): void
+    {
+        try {
+            Assert::validQName($name);
+            $this->assertTrue($shouldPass);
+        } catch (AssertionFailedException $e) {
+            $this->assertFalse($shouldPass);
+        }
+    }
+
+
+    /**
+     * @return array<int, array{0: bool, 1: string}>
+     */
+    public static function provideQName(): array
+    {
+        return [
+            [true, 'some:Test'],
+            [true, 'some:_Test'],
+            [true, '_some:_Test'],
+            [true, 'Test'],
+            // Cannot start with a colon
+            [false, ':test'],
+            // Cannot contain multiple colons
+            [false, 'test:test:test'],
+            // Cannot start with a number
+            [false, '1Test'],
+            // Cannot contain a wildcard character
+            [false, 'Te*st'],
+            // Prefixed newlines are forbidden
+            [false, "\nsome:Test"],
+            // Trailing newlines are forbidden
+            [false, "some:Test\n"],
+        ];
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/Registry/ElementRegistryTest.php

@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\Test\XML;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\Group;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\XML\Registry\ElementRegistry;
+
+/**
+ * @package simplesamlphp\xml-common
+ */
+#[CoversClass(ElementRegistry::class)]
+#[Group('registry')]
+final class ElementRegistryTest extends TestCase
+{
+    /** @var \SimpleSAML\XML\Registry\ElementRegistry */
+    protected static ElementRegistry $registry;
+
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$registry = ElementRegistry::getInstance();
+        self::$registry->registerElementHandler('\SimpleSAML\Test\XML\Element');
+    }
+
+
+    /**
+     */
+    public function testFetchingHandlerWorks(): void
+    {
+        $handler = self::$registry->getElementHandler('urn:x-simplesamlphp:namespace', 'Element');
+        $this->assertEquals($handler, '\SimpleSAML\Test\XML\Element');
+    }
+
+
+    /**
+     */
+    public function testAddingHandlerWorks(): void
+    {
+        self::$registry->registerElementHandler('\SimpleSAML\Test\XML\ExtendableElement');
+        $handler = self::$registry->getElementHandler('urn:x-simplesamlphp:namespace', 'ExtendableElement');
+        $this->assertEquals($handler, '\SimpleSAML\Test\XML\ExtendableElement');
+    }
+
+
+    /**
+     */
+    public function testUnknownHandlerReturnsNull(): void
+    {
+        $handler = self::$registry->getElementHandler('urn:x-simplesamlphp:namespace', 'UnknownElement');
+        $this->assertNull($handler);
+    }
+}

plugins/simplesaml/lib/vendor/simplesamlphp/xml-common/tests/resources/schemas/simplesamlphp.xsd

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE schema
+  PUBLIC "-//W3C//DTD XMLSchema 200102//EN" "http://www.w3.org/2001/XMLSchema.dtd"
+ [
+   <!ATTLIST schema 
+     xmlns:ds CDATA #FIXED "urn:x-simplesamlphp:namespace">
+   <!ENTITY ssp 'urn:x-simplesamlphp:namespace'>
+   <!ENTITY % p ''>
+   <!ENTITY % s ''>
+  ]>
+
+<!-- Schema for SimpleSAMLphp dummy classes -->
+
+<schema xmlns="http://www.w3.org/2001/XMLSchema"
+        xmlns:ssp="urn:x-simplesamlphp:namespace"
+        targetNamespace="urn:x-simplesamlphp:namespace"
+        version="0.1" elementFormDefault="qualified"> 
+
+<!-- Start ExtendableElement -->
+
+<element name="ExtendableElement" type="ssp:ExtendableElementType"/>
+<complexType name="ExtendableElementType">
+  <sequence> 
+    <element ref="ssp:Chunk"/> 
+    <any namespace="##any" processContents="lax"/>
+    <!-- (1,1) elements from (1,1) external namespace -->
+  </sequence>  
+</complexType>
+
+<!-- End ExtendableElement -->
+
+<!-- Start Chunk -->
+
+<element name="Chunk" type="string"/>
+
+<!-- End Chunk -->
+
+<!-- Start BooleanElement -->
+
+<element name="BooleanElement" type="boolean"/>
+
+<!-- End BooleanElement -->
+
+<!-- Start StringElement -->
+
+<element name="StringElement" type="string"/>
+
+<!-- End StringElement -->
+
+<!-- Start URIElement -->
+
+<element name="URIElement" type="anyURI"/>
+
+<!-- End URIElement -->
+
+<!-- Start ExtendableAttributesElement -->
+
+<element name="ExtendableAttributesElement" type="ssp:ExtendableAttributesElementType"/>
+<complexType name="ExtendableAttributesElementType">
+  <anyAttribute namespace="##any" processContents="lax"/>
+</complexType>
+
+<!-- End ExtendableAttributesElement -->
+
+</schema>