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CertTests.cs
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CertTests.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Generic;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading;
using Microsoft.DotNet.XUnitExtensions;
using Test.Cryptography;
using Xunit;
using Xunit.Abstractions;
namespace System.Security.Cryptography.X509Certificates.Tests
{
[SkipOnPlatform(TestPlatforms.Browser, "Browser doesn't support X.509 certificates")]
public class CertTests
{
private const string PrivateKeySectionHeader = "[Private Key]";
private const string PublicKeySectionHeader = "[Public Key]";
private readonly ITestOutputHelper _log;
public CertTests(ITestOutputHelper output)
{
_log = output;
}
[Fact]
public static void RaceDisposeAndKeyAccess()
{
using RSA rsa = RSA.Create();
CertificateRequest req = new CertificateRequest("CN=potato", rsa, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
using X509Certificate2 cert = req.CreateSelfSigned(DateTimeOffset.Now, DateTimeOffset.Now);
for (int i = 0; i < 100; i++)
{
X509Certificate2 w = new X509Certificate2(cert.RawData.AsSpan());
X509Certificate2 y = w.CopyWithPrivateKey(rsa);
w.Dispose();
Thread t1 = new Thread(cert => {
Thread.Sleep(Random.Shared.Next(0, 20));
X509Certificate2 c = (X509Certificate2)cert!;
c.Dispose();
GC.Collect();
});
Thread t2 = new Thread(cert => {
Thread.Sleep(Random.Shared.Next(0, 20));
X509Certificate2 c = (X509Certificate2)cert!;
try
{
c.GetRSAPrivateKey()!.ExportParameters(false);
}
catch
{
// don't care about managed exceptions.
}
});
t1.Start(y);
t2.Start(y);
t1.Join();
t2.Join();
}
}
[Fact]
public static void RaceUseAndDisposeDoesNotCrash()
{
X509Certificate2 cert = new X509Certificate2(TestFiles.MicrosoftRootCertFile);
Thread subjThread = new Thread(static state => {
X509Certificate2 c = (X509Certificate2)state;
try
{
_ = c.Subject;
}
catch
{
// managed exceptions are okay, we are looking for runtime crashes.
}
});
Thread disposeThread = new Thread(static state => {
((X509Certificate2)state).Dispose();
});
subjThread.Start(cert);
disposeThread.Start(cert);
disposeThread.Join();
subjThread.Join();
}
[Fact]
public static void X509CertTest()
{
string certSubject = @"CN=Microsoft Corporate Root Authority, OU=ITG, O=Microsoft, L=Redmond, S=WA, C=US, E=pkit@microsoft.com";
string certSubjectObsolete = @"E=pkit@microsoft.com, C=US, S=WA, L=Redmond, O=Microsoft, OU=ITG, CN=Microsoft Corporate Root Authority";
using (X509Certificate cert = new X509Certificate(TestFiles.MicrosoftRootCertFile))
{
Assert.Equal(certSubject, cert.Subject);
Assert.Equal(certSubject, cert.Issuer);
#pragma warning disable CS0618 // Type or member is obsolete
Assert.Equal(certSubjectObsolete, cert.GetName());
Assert.Equal(certSubjectObsolete, cert.GetIssuerName());
#pragma warning restore CS0618
byte[] serial1 = cert.GetSerialNumber();
byte[] serial2 = cert.GetSerialNumber();
Assert.NotSame(serial1, serial2);
AssertExtensions.SequenceEqual(serial1, serial2);
// Big-endian value
byte[] expectedSerial = "2A98A8770374E7B34195EBE04D9B17F6".HexToByteArray();
AssertExtensions.SequenceEqual(expectedSerial, cert.SerialNumberBytes.Span);
// GetSerialNumber() returns in little-endian order.
Array.Reverse(expectedSerial);
AssertExtensions.SequenceEqual(expectedSerial, serial1);
Assert.Equal("1.2.840.113549.1.1.1", cert.GetKeyAlgorithm());
int pklen = cert.GetPublicKey().Length;
Assert.Equal(270, pklen);
byte[] publicKey = new byte[pklen];
Buffer.BlockCopy(cert.GetPublicKey(), 0,
publicKey, 0,
pklen);
Assert.Equal(0x30, publicKey[0]);
Assert.Equal(0xB6, publicKey[9]);
Assert.Equal(1, publicKey[pklen - 1]);
}
}
[Fact]
public static void X509Cert2Test()
{
string certName = @"E=admin@digsigtrust.com, CN=ABA.ECOM Root CA, O=""ABA.ECOM, INC."", L=Washington, S=DC, C=US";
DateTime notBefore = new DateTime(1999, 7, 12, 17, 33, 53, DateTimeKind.Utc).ToLocalTime();
DateTime notAfter = new DateTime(2009, 7, 9, 17, 33, 53, DateTimeKind.Utc).ToLocalTime();
using (X509Certificate2 cert2 = new X509Certificate2(TestFiles.TestCertFile))
{
Assert.Equal(certName, cert2.IssuerName.Name);
Assert.Equal(certName, cert2.SubjectName.Name);
Assert.Equal("ABA.ECOM Root CA", cert2.GetNameInfo(X509NameType.DnsName, true));
PublicKey pubKey = cert2.PublicKey;
Assert.Equal("RSA", pubKey.Oid.FriendlyName);
Assert.Equal(notAfter, cert2.NotAfter);
Assert.Equal(notBefore, cert2.NotBefore);
Assert.Equal(notAfter.ToString(), cert2.GetExpirationDateString());
Assert.Equal(notBefore.ToString(), cert2.GetEffectiveDateString());
Assert.Equal("00D01E4090000046520000000100000004", cert2.SerialNumber);
Assert.Equal("1.2.840.113549.1.1.5", cert2.SignatureAlgorithm.Value);
Assert.NotEmpty(cert2.SignatureAlgorithm.FriendlyName);
Assert.Equal("7A74410FB0CD5C972A364B71BF031D88A6510E9E", cert2.Thumbprint);
Assert.Equal(3, cert2.Version);
}
}
[ActiveIssue("https://github.com/dotnet/runtime/issues/26213")]
[ConditionalFact]
[OuterLoop("May require using the network, to download CRLs and intermediates")]
public void TestVerify()
{
bool success;
using (var microsoftDotCom = new X509Certificate2(TestData.MicrosoftDotComLegacySslCertBytes))
{
// Fails because expired (NotAfter = 10/16/2016)
Assert.False(microsoftDotCom.Verify(), "MicrosoftDotComLegacySslCertBytes");
}
using (var microsoftDotComIssuer = new X509Certificate2(TestData.MicrosoftDotComIssuerBytes))
{
// NotAfter=10/8/2024, 7:00:00 AM UTC
success = microsoftDotComIssuer.Verify();
if (!success)
{
LogVerifyErrors(microsoftDotComIssuer, "MicrosoftDotComIssuerBytes");
}
Assert.True(success, "MicrosoftDotComIssuerBytes");
}
// High Sierra fails to build a chain for a self-signed certificate with revocation enabled.
// https://github.com/dotnet/runtime/issues/22625
if (PlatformDetection.IsNotOSX)
{
using (var microsoftDotComRoot = new X509Certificate2(TestData.MicrosoftDotComRootBytes))
{
// NotAfter=7/17/2025
success = microsoftDotComRoot.Verify();
if (!success)
{
LogVerifyErrors(microsoftDotComRoot, "MicrosoftDotComRootBytes");
}
Assert.True(success, "MicrosoftDotComRootBytes");
}
}
}
private void LogVerifyErrors(X509Certificate2 cert, string testName)
{
// Emulate cert.Verify() implementation in order to capture and log errors.
try
{
using (var chain = new X509Chain())
{
if (!chain.Build(cert))
{
foreach (X509ChainStatus chainStatus in chain.ChainStatus)
{
_log.WriteLine($"X509Certificate2.Verify error: {testName}, {chainStatus.Status}, {chainStatus.StatusInformation}");
}
}
else
{
_log.WriteLine($"X509Certificate2.Verify expected error; received none: {testName}");
}
}
}
catch (Exception e)
{
_log.WriteLine($"X509Certificate2.Verify exception: {testName}, {e}");
}
}
[Fact]
public static void X509CertEmptyToString()
{
using (var c = new X509Certificate())
{
string expectedResult = "System.Security.Cryptography.X509Certificates.X509Certificate";
Assert.Equal(expectedResult, c.ToString());
Assert.Equal(expectedResult, c.ToString(false));
Assert.Equal(expectedResult, c.ToString(true));
}
}
[Fact]
public static void X509Cert2EmptyToString()
{
using (var c2 = new X509Certificate2())
{
string expectedResult = "System.Security.Cryptography.X509Certificates.X509Certificate2";
Assert.Equal(expectedResult, c2.ToString());
Assert.Equal(expectedResult, c2.ToString(false));
Assert.Equal(expectedResult, c2.ToString(true));
}
}
[Fact]
public static void X509Cert2ToStringVerbose()
{
using (X509Store store = new X509Store("My", StoreLocation.CurrentUser))
{
store.Open(OpenFlags.ReadOnly);
foreach (X509Certificate2 c in store.Certificates)
{
Assert.False(string.IsNullOrWhiteSpace(c.ToString(true)));
c.Dispose();
}
}
}
[Theory]
[MemberData(nameof(StorageFlags))]
public static void X509Certificate2ToStringVerbose_WithPrivateKey(X509KeyStorageFlags keyStorageFlags)
{
using (var cert = new X509Certificate2(TestData.PfxData, TestData.PfxDataPassword, keyStorageFlags))
{
string certToString = cert.ToString(true);
Assert.Contains(PrivateKeySectionHeader, certToString);
Assert.Contains(PublicKeySectionHeader, certToString);
}
}
[Theory]
[MemberData(nameof(StorageFlags))]
public static void X509Certificate2ToStringVerbose_WithPrivateKey_FromSpans(X509KeyStorageFlags keyStorageFlags)
{
Span<char> pwTmp = stackalloc char[30];
pwTmp.Fill('Z');
TestData.PfxDataPassword.AsSpan().CopyTo(pwTmp);
ReadOnlySpan<char> pw = pwTmp.Slice(0, TestData.PfxDataPassword.Length);
using (var cert = new X509Certificate2(TestData.PfxData.AsSpan(), pw, keyStorageFlags))
{
string certToString = cert.ToString(true);
Assert.Contains(PrivateKeySectionHeader, certToString);
Assert.Contains(PublicKeySectionHeader, certToString);
}
}
[Fact]
public static void X509Certificate2ToStringVerbose_NoPrivateKey()
{
using (var cert = new X509Certificate2(TestData.MsCertificatePemBytes))
{
string certToString = cert.ToString(true);
Assert.DoesNotContain(PrivateKeySectionHeader, certToString);
Assert.Contains(PublicKeySectionHeader, certToString);
}
}
[Fact]
public static void X509Certificate2ToStringVerbose_NoPrivateKey_FromSpan()
{
using (var cert = new X509Certificate2(TestData.MsCertificatePemBytes.AsSpan()))
{
string certToString = cert.ToString(true);
Assert.DoesNotContain(PrivateKeySectionHeader, certToString);
Assert.Contains(PublicKeySectionHeader, certToString);
}
}
[Fact]
public static void X509Cert2CreateFromEmptyPfx()
{
Assert.ThrowsAny<CryptographicException>(() => new X509Certificate2(TestData.EmptyPfx));
}
[Fact]
public static void X509Cert2CreateFromPfxFile()
{
using (X509Certificate2 cert2 = new X509Certificate2(TestFiles.DummyTcpServerPfxFile))
{
// OID=RSA Encryption
Assert.Equal("1.2.840.113549.1.1.1", cert2.GetKeyAlgorithm());
}
}
[Fact]
public static void X509Cert2CreateFromPfxWithPassword()
{
using (X509Certificate2 cert2 = new X509Certificate2(TestFiles.ChainPfxFile, TestData.ChainPfxPassword))
{
// OID=RSA Encryption
Assert.Equal("1.2.840.113549.1.1.1", cert2.GetKeyAlgorithm());
}
}
[Fact]
public static void X509Cert2CreateFromPfxWithSpanPassword()
{
Span<char> pw = stackalloc char[] { 't', 'e', 's', 't' };
using (X509Certificate2 cert2 = new X509Certificate2(TestFiles.ChainPfxFile, pw))
{
// OID=RSA Encryption
Assert.Equal("1.2.840.113549.1.1.1", cert2.GetKeyAlgorithm());
}
}
[Fact]
public static void X509Certificate2FromPkcs7DerFile()
{
Assert.ThrowsAny<CryptographicException>(() => new X509Certificate2(TestFiles.Pkcs7SingleDerFile));
}
[Fact]
public static void X509Certificate2FromPkcs7PemFile()
{
Assert.ThrowsAny<CryptographicException>(() => new X509Certificate2(TestFiles.Pkcs7SinglePemFile));
}
[Fact]
public static void X509Certificate2FromPkcs7DerBlob()
{
Assert.ThrowsAny<CryptographicException>(() => new X509Certificate2(TestData.Pkcs7SingleDerBytes));
}
[Fact]
public static void X509Certificate2FromPkcs7PemBlob()
{
Assert.ThrowsAny<CryptographicException>(() => new X509Certificate2(TestData.Pkcs7SinglePemBytes));
}
[Fact]
public static void UseAfterDispose()
{
using (X509Certificate2 c = new X509Certificate2(TestData.MsCertificate))
{
IntPtr h = c.Handle;
// Do a couple of things that would only be true on a valid certificate, as a precondition.
Assert.NotEqual(IntPtr.Zero, h);
byte[] actualThumbprint = c.GetCertHash();
c.Dispose();
// For compat reasons, Dispose() acts like the now-defunct Reset() method rather than
// causing ObjectDisposedExceptions.
h = c.Handle;
Assert.Equal(IntPtr.Zero, h);
// State held on X509Certificate
Assert.ThrowsAny<CryptographicException>(() => c.GetCertHash());
Assert.ThrowsAny<CryptographicException>(() => c.GetCertHashString());
Assert.ThrowsAny<CryptographicException>(() => c.GetCertHash(HashAlgorithmName.SHA256));
Assert.ThrowsAny<CryptographicException>(() => c.GetCertHashString(HashAlgorithmName.SHA256));
Assert.ThrowsAny<CryptographicException>(() => c.GetKeyAlgorithm());
Assert.ThrowsAny<CryptographicException>(() => c.GetKeyAlgorithmParameters());
Assert.ThrowsAny<CryptographicException>(() => c.GetKeyAlgorithmParametersString());
Assert.ThrowsAny<CryptographicException>(() => c.GetPublicKey());
Assert.ThrowsAny<CryptographicException>(() => c.GetSerialNumber());
Assert.ThrowsAny<CryptographicException>(() => c.SerialNumberBytes);
Assert.ThrowsAny<CryptographicException>(() => c.Issuer);
Assert.ThrowsAny<CryptographicException>(() => c.Subject);
Assert.ThrowsAny<CryptographicException>(() => c.NotBefore);
Assert.ThrowsAny<CryptographicException>(() => c.NotAfter);
Assert.ThrowsAny<CryptographicException>(
() => c.TryGetCertHash(HashAlgorithmName.SHA256, Array.Empty<byte>(), out _));
// State held on X509Certificate2
Assert.ThrowsAny<CryptographicException>(() => c.RawDataMemory);
Assert.ThrowsAny<CryptographicException>(() => c.RawData);
Assert.ThrowsAny<CryptographicException>(() => c.SignatureAlgorithm);
Assert.ThrowsAny<CryptographicException>(() => c.Version);
Assert.ThrowsAny<CryptographicException>(() => c.SubjectName);
Assert.ThrowsAny<CryptographicException>(() => c.IssuerName);
Assert.ThrowsAny<CryptographicException>(() => c.PublicKey);
Assert.ThrowsAny<CryptographicException>(() => c.Extensions);
Assert.ThrowsAny<CryptographicException>(() => c.PrivateKey);
}
}
[Fact]
public static void ExportPublicKeyAsPkcs12()
{
using (X509Certificate2 publicOnly = new X509Certificate2(TestData.MsCertificate))
{
// Pre-condition: There's no private key
Assert.False(publicOnly.HasPrivateKey);
byte[] pkcs12Bytes = publicOnly.Export(X509ContentType.Pkcs12);
// Read it back as a collection, there should be only one cert, and it should
// be equal to the one we started with.
using (ImportedCollection ic = Cert.Import(pkcs12Bytes))
{
X509Certificate2Collection fromPfx = ic.Collection;
Assert.Equal(1, fromPfx.Count);
Assert.Equal(publicOnly, fromPfx[0]);
}
}
}
[Fact]
public static void X509Certificate2WithT61String()
{
string certSubject = @"E=mabaul@microsoft.com, OU=Engineering, O=Xamarin, S=Massachusetts, C=US, CN=test-server.local";
using (var cert = new X509Certificate2(TestData.T61StringCertificate))
{
Assert.Equal(certSubject, cert.Subject);
Assert.Equal(certSubject, cert.Issuer);
Assert.Equal("9E7A5CCC9F951A8700", cert.GetSerialNumber().ByteArrayToHex());
Assert.Equal("00871A959FCC5C7A9E", cert.SerialNumberBytes.ByteArrayToHex());
Assert.Equal("1.2.840.113549.1.1.1", cert.GetKeyAlgorithm());
Assert.Equal(74, cert.GetPublicKey().Length);
Assert.Equal("test-server.local", cert.GetNameInfo(X509NameType.SimpleName, false));
Assert.Equal("mabaul@microsoft.com", cert.GetNameInfo(X509NameType.EmailName, false));
}
}
[Fact]
[PlatformSpecific(TestPlatforms.Windows)]
public static void SerializedCertDisposeDoesNotRemoveKeyFile()
{
using (X509Certificate2 fromPfx = new X509Certificate2(TestData.PfxData, TestData.PfxDataPassword))
{
Assert.True(fromPfx.HasPrivateKey, "fromPfx.HasPrivateKey - before");
byte[] serializedCert = fromPfx.Export(X509ContentType.SerializedCert);
using (X509Certificate2 fromSerialized = new X509Certificate2(serializedCert))
{
Assert.True(fromSerialized.HasPrivateKey, "fromSerialized.HasPrivateKey");
}
using (RSA key = fromPfx.GetRSAPrivateKey())
{
key.SignData(serializedCert, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
}
}
}
[Fact]
public static void CopyResult_RawData()
{
using (X509Certificate2 cert = new X509Certificate2(TestData.MsCertificate))
{
byte[] first = cert.RawData;
byte[] second = cert.RawData;
Assert.NotSame(first, second);
}
}
[Fact]
public static void RawDataMemory_NoCopy()
{
using (X509Certificate2 cert = new X509Certificate2(TestData.MsCertificate))
{
ReadOnlyMemory<byte> first = cert.RawDataMemory;
ReadOnlyMemory<byte> second = cert.RawDataMemory;
Assert.True(first.Span == second.Span, "RawDataMemory returned different values.");
}
}
[Fact]
public static void RawDataMemory_RoundTrip_LifetimeIndependentOfCert()
{
ReadOnlyMemory<byte> memory;
using (X509Certificate2 cert = new X509Certificate2(TestData.MsCertificate))
{
memory = cert.RawDataMemory;
}
AssertExtensions.SequenceEqual(TestData.MsCertificate.AsSpan(), memory.Span);
}
[Fact]
public static void MutateDistinguishedName_IssuerName_DoesNotImpactIssuer()
{
using (X509Certificate2 cert = new X509Certificate2(TestData.MsCertificate))
{
byte[] issuerBytes = cert.IssuerName.RawData;
Array.Clear(issuerBytes);
Assert.Equal("CN=Microsoft Code Signing PCA, O=Microsoft Corporation, L=Redmond, S=Washington, C=US", cert.Issuer);
}
}
[Fact]
public static void MutateDistinguishedName_SubjectName_DoesNotImpactSubject()
{
using (X509Certificate2 cert = new X509Certificate2(TestData.MsCertificate))
{
byte[] subjectBytes = cert.SubjectName.RawData;
Array.Clear(subjectBytes);
Assert.Equal("CN=Microsoft Corporation, OU=MOPR, O=Microsoft Corporation, L=Redmond, S=Washington, C=US", cert.Subject);
}
}
[Fact]
public static void SignatureAlgorithmOidReadableForGostCertificate()
{
using (X509Certificate2 cert = new X509Certificate2(TestData.GostCertificate))
{
Assert.Equal("1.2.643.2.2.3", cert.SignatureAlgorithm.Value);
}
}
[ConditionalFact(typeof(PlatformSupport), nameof(PlatformSupport.PlatformCryptoProviderFunctional))]
[OuterLoop("Hardware backed key generation takes several seconds.")]
public static void CreateCertificate_MicrosoftPlatformCryptoProvider_EcdsaKey()
{
using (CngPlatformProviderKey platformKey = new CngPlatformProviderKey(CngAlgorithm.ECDsaP384))
using (ECDsaCng ecdsa = new ECDsaCng(platformKey.Key))
{
CertificateRequest req = new CertificateRequest("CN=potato", ecdsa, HashAlgorithmName.SHA256);
using (X509Certificate2 cert = req.CreateSelfSigned(DateTimeOffset.UtcNow, DateTimeOffset.UtcNow))
using (ECDsa certKey = cert.GetECDsaPrivateKey())
{
Assert.NotNull(certKey);
byte[] data = new byte[] { 12, 11, 02, 08, 25, 14, 11, 18, 16 };
byte[] signature = certKey.SignData(data, HashAlgorithmName.SHA256);
bool valid = ecdsa.VerifyData(data, signature, HashAlgorithmName.SHA256);
Assert.True(valid, "valid signature");
}
}
}
[ConditionalFact(typeof(PlatformSupport), nameof(PlatformSupport.PlatformCryptoProviderFunctional))]
[OuterLoop("Hardware backed key generation takes several seconds.")]
public static void CreateCertificate_MicrosoftPlatformCryptoProvider_RsaKey()
{
using (CngPlatformProviderKey platformKey = new CngPlatformProviderKey(CngAlgorithm.Rsa))
using (RSACng rsa = new RSACng(platformKey.Key))
{
CertificateRequest req = new CertificateRequest("CN=potato", rsa, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
using (X509Certificate2 cert = req.CreateSelfSigned(DateTimeOffset.UtcNow, DateTimeOffset.UtcNow))
using (RSA certKey = cert.GetRSAPrivateKey())
{
Assert.NotNull(certKey);
byte[] data = new byte[] { 12, 11, 02, 08, 25, 14, 11, 18, 16 };
byte[] signature = certKey.SignData(data, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
bool valid = rsa.VerifyData(data, signature, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
Assert.True(valid, "valid signature");
}
}
}
public static IEnumerable<object[]> StorageFlags => CollectionImportTests.StorageFlags;
}
}