diff --git a/crypto/test/UnitTests.csproj b/crypto/test/UnitTests.csproj
index 9420cc832..1378034a6 100644
--- a/crypto/test/UnitTests.csproj
+++ b/crypto/test/UnitTests.csproj
@@ -85,6 +85,7 @@
<Compile Include="src\asn1\test\IssuingDistributionPointTest.cs" />
<Compile Include="src\asn1\test\KeyUsageTest.cs" />
<Compile Include="src\asn1\test\LDSSecurityObjectUnitTest.cs" />
+ <Compile Include="src\asn1\test\LinkedCertificateTest.cs" />
<Compile Include="src\asn1\test\MiscTest.cs" />
<Compile Include="src\asn1\test\MonetaryLimitUnitTest.cs" />
<Compile Include="src\asn1\test\MonetaryValueUnitTest.cs" />
diff --git a/crypto/test/src/asn1/test/LinkedCertificateTest.cs b/crypto/test/src/asn1/test/LinkedCertificateTest.cs
new file mode 100644
index 000000000..416c048c0
--- /dev/null
+++ b/crypto/test/src/asn1/test/LinkedCertificateTest.cs
@@ -0,0 +1,97 @@
+using System;
+
+using NUnit.Framework;
+
+using Org.BouncyCastle.Asn1.BC;
+using Org.BouncyCastle.Asn1.Nist;
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Tests
+{
+ [TestFixture]
+ public class LinkedCertificateTest
+ : Asn1UnitTest
+ {
+ public override string Name
+ {
+ get { return "LinkedCertificate"; }
+ }
+
+ public override void PerformTest()
+ {
+ DigestInfo digInfo = new DigestInfo(new AlgorithmIdentifier(NistObjectIdentifiers.IdSha256), new byte[32]);
+ GeneralName certLocation = new GeneralName(GeneralName.UniformResourceIdentifier, "https://www.bouncycastle.org/certs");
+ X509Name certIssuer = null;
+ GeneralNames cACerts = null;
+
+ LinkedCertificate linked = new LinkedCertificate(digInfo, certLocation);
+
+ CheckConstruction(linked, digInfo, certLocation, certIssuer, cACerts);
+
+ certIssuer = new X509Name("CN=Test");
+ cACerts = new GeneralNames(new GeneralName(new X509Name("CN=CA Test")));
+
+ linked = new LinkedCertificate(digInfo, certLocation, certIssuer, cACerts);
+
+ CheckConstruction(linked, digInfo, certLocation, certIssuer, cACerts);
+
+ linked = LinkedCertificate.GetInstance(null);
+
+ if (linked != null)
+ {
+ Fail("null getInstance() failed.");
+ }
+
+ try
+ {
+ LinkedCertificate.GetInstance(new object());
+
+ Fail("getInstance() failed to detect bad object.");
+ }
+ catch (ArgumentException e)
+ {
+ // expected
+ }
+ }
+
+ private void CheckConstruction(LinkedCertificate linked, DigestInfo digestInfo, GeneralName certLocation,
+ X509Name certIssuer, GeneralNames caCerts)
+ {
+ CheckValues(linked, digestInfo, certLocation, certIssuer, caCerts);
+
+ linked = LinkedCertificate.GetInstance(linked);
+
+ CheckValues(linked, digestInfo, certLocation, certIssuer, caCerts);
+
+ Asn1InputStream aIn = new Asn1InputStream(linked.ToAsn1Object().GetEncoded());
+
+ Asn1Sequence seq = (Asn1Sequence)aIn.ReadObject();
+
+ linked = LinkedCertificate.GetInstance(seq);
+
+ CheckValues(linked, digestInfo, certLocation, certIssuer, caCerts);
+ }
+
+ private void CheckValues(LinkedCertificate linked, DigestInfo digestInfo, GeneralName certLocation,
+ X509Name certIssuer, GeneralNames caCerts)
+ {
+ checkMandatoryField("digest", digestInfo, linked.Digest);
+ checkMandatoryField("certLocatin", certLocation, linked.CertLocation);
+ checkOptionalField("certIssuer", certIssuer, linked.CertIssuer);
+ checkOptionalField("caCerts", caCerts, linked.CACerts);
+ }
+
+ public static void Main(string[] args)
+ {
+ RunTest(new LinkedCertificateTest());
+ }
+
+ [Test]
+ public void TestFunction()
+ {
+ string resultText = Perform().ToString();
+
+ Assert.AreEqual(Name + ": Okay", resultText);
+ }
+ }
+}
diff --git a/crypto/test/src/asn1/test/RegressionTest.cs b/crypto/test/src/asn1/test/RegressionTest.cs
index 4534f2c75..67860ccd7 100644
--- a/crypto/test/src/asn1/test/RegressionTest.cs
+++ b/crypto/test/src/asn1/test/RegressionTest.cs
@@ -37,6 +37,7 @@ namespace Org.BouncyCastle.Asn1.Tests
new IssuingDistributionPointUnitTest(),
new KeyUsageTest(),
new LDSSecurityObjectUnitTest(),
+ new LinkedCertificateTest(),
new MiscTest(),
new MonetaryLimitUnitTest(),
new MonetaryValueUnitTest(),
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