From a025b5cabc43cfd017284d3e8caf7e449ac5c630 Mon Sep 17 00:00:00 2001
From: Alexander Danilov <adapik@yandex.ru>
Date: Fri, 5 Dec 2025 15:46:23 +0200
Subject: [PATCH] AlgorithmIdentifier - new getParamters method

---
 src/CMS/AlgorithmIdentifier.php       | 10 ++++++++++
 tests/CMS/AlgorithmIdentifierTest.php | 18 ++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/src/CMS/AlgorithmIdentifier.php b/src/CMS/AlgorithmIdentifier.php
index 9b97565..32a0c8f 100644
--- a/src/CMS/AlgorithmIdentifier.php
+++ b/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;
+    }
 }
diff --git a/tests/CMS/AlgorithmIdentifierTest.php b/tests/CMS/AlgorithmIdentifierTest.php
index f30f5b1..ca974d0 100644
--- a/tests/CMS/AlgorithmIdentifierTest.php
+++ b/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);
+        }
+    }
 }