AlgorithmIdentifier - new getParamters method

src/CMS/AlgorithmIdentifier.php

@@ -12,6 +12,7 @@
 
 use Adapik\CMS\Exception\FormatException;
 use Adapik\CMS\Interfaces\CMSInterface;
+use FG\ASN1\ASN1Object;
 use FG\ASN1\Universal\Sequence;
 
 /**
@@ -39,4 +40,13 @@ public function getAlgorithmOid(): string
     {
         return $this->object->getChildren()[0]->__toString();
     }
+
+    /**
+     * @return ASN1Object|null
+     */
+    public function getParameters(): ?ASN1Object
+    {
+        $children = $this->object->getChildren();
+        return $children[1] ?? null;
+    }
 }

tests/CMS/AlgorithmIdentifierTest.php

@@ -15,6 +15,7 @@
 use Adapik\CMS\AlgorithmIdentifier;
 use Adapik\CMS\Exception\FormatException;
 use Adapik\CMS\SignedData;
+use FG\ASN1\ASN1Object;
 use PHPUnit\Framework\TestCase;
 
 class AlgorithmIdentifierTest extends TestCase
@@ -40,4 +41,21 @@ public function testBase()
             self::assertEquals($binary, $newSA->getBinary());
         }
     }
+
+    /**
+     * @throws FormatException
+     */
+    public function testGetParameters()
+    {
+        $binary = base64_decode(file_get_contents(__DIR__ . '/../fixtures/pull_request.cms'));
+        $signedData = SignedData::createFromContent($binary);
+
+        foreach ($signedData->getSignedDataContent()->getCertificateSet() as $certificate) {
+            $signatureAlgorithm = $certificate->getSignatureAlgorithm();
+
+            $parameters = $signatureAlgorithm->getParameters();
+
+            self::assertInstanceOf(ASN1Object::class, $parameters);
+        }
+    }
 }