Add xenc11:DerivedKeyName element

src/XML/xenc11/DerivedKeyName.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XMLSecurity\XML\xenc11;
+
+use SimpleSAML\XML\StringElementTrait;
+
+/**
+ * Class representing a xenc11:DerivedKeyName element.
+ *
+ * @package simplesamlphp/xml-security
+ */
+final class DerivedKeyName extends AbstractXenc11Element
+{
+    use StringElementTrait;
+
+
+    /**
+     * @param string $content
+     */
+    public function __construct(string $content)
+    {
+        $this->setContent($content);
+    }
+}

tests/XML/xenc11/DerivedKeyNameTest.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimpleSAML\XMLSecurity\Test\XML\xenc11;
+
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\TestCase;
+use SimpleSAML\XML\DOMDocumentFactory;
+use SimpleSAML\XML\TestUtils\SerializableElementTestTrait;
+use SimpleSAML\XMLSecurity\XML\xenc11\AbstractXenc11Element;
+use SimpleSAML\XMLSecurity\XML\xenc11\DerivedKeyName;
+
+use function dirname;
+use function strval;
+
+/**
+ * Class \SimpleSAML\XMLSecurity\XML\Test\xenc11\DerivedKeyNameTest
+ *
+ * @package simplesamlphp/xml-security
+ */
+#[CoversClass(AbstractXenc11Element::class)]
+#[CoversClass(DerivedKeyName::class)]
+final class DerivedKeyNameTest extends TestCase
+{
+    use SerializableElementTestTrait;
+
+    /**
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$testedClass = DerivedKeyName::class;
+
+        self::$xmlRepresentation = DOMDocumentFactory::fromFile(
+            dirname(__FILE__, 3) . '/resources/xml/xenc11_DerivedKeyName.xml',
+        );
+    }
+
+
+    /**
+     */
+    public function testMarshalling(): void
+    {
+        $derivedKeyName = new DerivedKeyName('phpunit');
+
+        $this->assertEquals(
+            self::$xmlRepresentation->saveXML(self::$xmlRepresentation->documentElement),
+            strval($derivedKeyName),
+        );
+    }
+}

tests/resources/xml/xenc11_DerivedKeyName.xml

@@ -0,0 +1 @@
+<xenc11:DerivedKeyName xmlns:xenc11="http://www.w3.org/2009/xmlenc11#">phpunit</xenc11:DerivedKeyName>