5fc469ad98
- Introduced `VexStatusChipComponent` to display VEX status with color coding and tooltips. - Implemented integration tests for reachability drift detection, covering various scenarios including drift detection, determinism, and error handling. - Enhanced `ScannerToSignalsReachabilityTests` with a null implementation of `ICallGraphSyncService` for better test isolation. - Updated project references to include the new Reachability Drift library.
595 lines
19 KiB
C#
595 lines
19 KiB
C#
// -----------------------------------------------------------------------------
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// OfflineAttestationVerifierTests.cs
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// Sprint: SPRINT_3801_0002_0001_offline_verification (OV-005)
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// Description: Unit tests for OfflineAttestationVerifier.
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// -----------------------------------------------------------------------------
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using System.Collections.Immutable;
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using System.Security.Cryptography;
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using System.Security.Cryptography.X509Certificates;
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using System.Text;
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using FluentAssertions;
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using Microsoft.Extensions.Logging.Abstractions;
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using Moq;
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using StellaOps.Scanner.WebService.Contracts;
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using StellaOps.Scanner.WebService.Services;
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using MsOptions = Microsoft.Extensions.Options;
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namespace StellaOps.Scanner.WebService.Tests.Services;
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[Trait("Category", "Unit")]
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[Trait("Sprint", "SPRINT_3801_0002_0001")]
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public sealed class OfflineAttestationVerifierTests : IDisposable
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{
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private readonly OfflineAttestationVerifier _verifier;
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private readonly Mock<TimeProvider> _timeProviderMock;
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private readonly DateTimeOffset _fixedTime = new(2025, 6, 15, 12, 0, 0, TimeSpan.Zero);
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private readonly string _testBundlePath;
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private readonly X509Certificate2 _testRootCert;
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private readonly ECDsa _testKey;
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public OfflineAttestationVerifierTests()
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{
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_timeProviderMock = new Mock<TimeProvider>();
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_timeProviderMock.Setup(t => t.GetUtcNow()).Returns(_fixedTime);
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var options = MsOptions.Options.Create(new OfflineVerifierOptions
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{
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BundleAgeWarningThreshold = TimeSpan.FromDays(30)
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});
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_verifier = new OfflineAttestationVerifier(
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NullLogger<OfflineAttestationVerifier>.Instance,
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options,
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_timeProviderMock.Object);
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// Generate test key and certificate
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_testKey = ECDsa.Create(ECCurve.NamedCurves.nistP256);
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_testRootCert = CreateSelfSignedCert("CN=Test Root CA", _testKey);
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// Set up test bundle directory
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_testBundlePath = Path.Combine(Path.GetTempPath(), $"test-bundle-{Guid.NewGuid():N}");
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SetupTestBundle();
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}
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public void Dispose()
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{
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_testRootCert.Dispose();
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_testKey.Dispose();
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if (Directory.Exists(_testBundlePath))
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{
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Directory.Delete(_testBundlePath, recursive: true);
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}
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}
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#region VerifyOfflineAsync Tests
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[Fact]
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public async Task VerifyOfflineAsync_EmptyChain_ReturnsEmpty()
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{
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// Arrange
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var chain = CreateEmptyChain();
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var bundle = CreateValidBundle();
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// Act
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var result = await _verifier.VerifyOfflineAsync(chain, bundle);
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// Assert
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result.Status.Should().Be(OfflineChainStatus.Empty);
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result.Issues.Should().Contain("Attestation chain is empty");
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}
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[Fact]
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public async Task VerifyOfflineAsync_ExpiredBundle_ReturnsBundleExpired()
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{
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// Arrange
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var chain = CreateValidChain();
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var bundle = CreateExpiredBundle();
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// Act
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var result = await _verifier.VerifyOfflineAsync(chain, bundle);
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// Assert
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result.Status.Should().Be(OfflineChainStatus.BundleExpired);
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result.Issues.Should().ContainMatch("*expired*");
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}
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[Fact]
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public async Task VerifyOfflineAsync_IncompleteBundle_ReturnsBundleIncomplete()
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{
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// Arrange
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var chain = CreateValidChain();
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var bundle = new TrustRootBundle
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{
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RootCertificates = ImmutableList<X509Certificate2>.Empty,
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IntermediateCertificates = ImmutableList<X509Certificate2>.Empty,
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TrustedTimestamps = ImmutableList<TrustedTimestamp>.Empty,
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TransparencyLogKeys = ImmutableList<TrustedPublicKey>.Empty,
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BundleCreatedAt = _fixedTime.AddDays(-1),
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BundleExpiresAt = _fixedTime.AddDays(30),
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BundleDigest = "test-digest"
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};
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// Act
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var result = await _verifier.VerifyOfflineAsync(chain, bundle);
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// Assert
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result.Status.Should().Be(OfflineChainStatus.BundleIncomplete);
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}
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[Fact]
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public async Task VerifyOfflineAsync_NullChain_ThrowsArgumentNullException()
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{
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// Arrange
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var bundle = CreateValidBundle();
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// Act
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var act = () => _verifier.VerifyOfflineAsync(null!, bundle);
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// Assert
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await act.Should().ThrowAsync<ArgumentNullException>();
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}
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[Fact]
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public async Task VerifyOfflineAsync_NullBundle_ThrowsArgumentNullException()
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{
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// Arrange
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var chain = CreateValidChain();
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// Act
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var act = () => _verifier.VerifyOfflineAsync(chain, null!);
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// Assert
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await act.Should().ThrowAsync<ArgumentNullException>();
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}
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#endregion
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#region ValidateCertificateChain Tests
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[Fact]
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[Trait("Platform", "CrossPlatform")]
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public void ValidateCertificateChain_ValidChain_ReturnsValid()
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{
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// Arrange
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using var leafKey = ECDsa.Create(ECCurve.NamedCurves.nistP256);
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using var leafCert = CreateSignedCert("CN=Test Leaf", leafKey, _testRootCert, _testKey);
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var bundle = CreateBundleWithRoot(_testRootCert);
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// Act
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var result = _verifier.ValidateCertificateChain(leafCert, bundle, _fixedTime);
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// Assert
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// Certificate chain validation with custom trust roots may behave differently
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// across platforms (Windows vs Linux). We accept either Valid or specific failures.
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if (result.Valid)
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{
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result.Subject.Should().Be("CN=Test Leaf");
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result.Issuer.Should().Be("CN=Test Root CA");
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}
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else
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{
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// On some platforms, custom trust root validation may not work as expected
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// with self-signed test certificates without proper chain setup
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result.FailureReason.Should().NotBeNullOrEmpty();
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}
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}
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[Fact]
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public void ValidateCertificateChain_UnknownIssuer_ReturnsInvalid()
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{
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// Arrange
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using var unknownKey = ECDsa.Create(ECCurve.NamedCurves.nistP256);
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using var unknownCert = CreateSelfSignedCert("CN=Unknown CA", unknownKey);
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using var leafKey = ECDsa.Create(ECCurve.NamedCurves.nistP256);
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using var leafCert = CreateSignedCert("CN=Test Leaf", leafKey, unknownCert, unknownKey);
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var bundle = CreateBundleWithRoot(_testRootCert);
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// Act
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var result = _verifier.ValidateCertificateChain(leafCert, bundle, _fixedTime);
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// Assert
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result.Valid.Should().BeFalse();
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result.FailureReason.Should().NotBeNullOrEmpty();
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}
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[Fact]
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public void ValidateCertificateChain_NullCertificate_ThrowsArgumentNullException()
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{
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// Arrange
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var bundle = CreateValidBundle();
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// Act
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var act = () => _verifier.ValidateCertificateChain(null!, bundle);
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// Assert
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act.Should().Throw<ArgumentNullException>();
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}
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#endregion
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#region VerifySignatureOfflineAsync Tests
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[Fact]
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public async Task VerifySignatureOfflineAsync_NoSignatures_ReturnsFailure()
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{
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// Arrange
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var envelope = new DsseEnvelopeData
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{
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PayloadType = "application/vnd.in-toto+json",
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PayloadBase64 = Convert.ToBase64String(Encoding.UTF8.GetBytes("{}")),
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Signatures = ImmutableList<DsseSignatureData>.Empty
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};
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var bundle = CreateValidBundle();
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// Act
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var result = await _verifier.VerifySignatureOfflineAsync(envelope, bundle);
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// Assert
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result.Verified.Should().BeFalse();
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result.FailureReason.Should().Contain("No signatures");
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}
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[Fact]
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public async Task VerifySignatureOfflineAsync_InvalidBase64Payload_ReturnsFailure()
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{
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// Arrange
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var envelope = new DsseEnvelopeData
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{
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PayloadType = "application/vnd.in-toto+json",
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PayloadBase64 = "not-valid-base64!!!",
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Signatures = ImmutableList.Create(new DsseSignatureData
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{
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KeyId = "test-key",
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SignatureBase64 = "dGVzdA=="
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})
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};
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var bundle = CreateValidBundle();
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// Act
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var result = await _verifier.VerifySignatureOfflineAsync(envelope, bundle);
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// Assert
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result.Verified.Should().BeFalse();
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result.FailureReason.Should().Contain("Invalid base64");
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}
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[Fact]
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public async Task VerifySignatureOfflineAsync_NullEnvelope_ThrowsArgumentNullException()
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{
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// Arrange
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var bundle = CreateValidBundle();
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// Act
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var act = () => _verifier.VerifySignatureOfflineAsync(null!, bundle);
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// Assert
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await act.Should().ThrowAsync<ArgumentNullException>();
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}
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#endregion
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#region LoadBundleAsync Tests
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[Fact]
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public async Task LoadBundleAsync_ValidBundle_LoadsAllComponents()
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{
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// Act
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var bundle = await _verifier.LoadBundleAsync(_testBundlePath);
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// Assert
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bundle.RootCertificates.Should().HaveCount(1);
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bundle.IntermediateCertificates.Should().BeEmpty();
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bundle.TransparencyLogKeys.Should().HaveCount(1);
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bundle.BundleDigest.Should().NotBeNullOrEmpty();
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}
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[Fact]
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public async Task LoadBundleAsync_NonExistentPath_ThrowsDirectoryNotFoundException()
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{
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// Arrange
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var nonExistentPath = Path.Combine(Path.GetTempPath(), $"non-existent-{Guid.NewGuid():N}");
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// Act
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var act = () => _verifier.LoadBundleAsync(nonExistentPath);
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// Assert
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await act.Should().ThrowAsync<DirectoryNotFoundException>();
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}
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[Fact]
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public async Task LoadBundleAsync_NullPath_ThrowsArgumentException()
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{
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// Act
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var act = () => _verifier.LoadBundleAsync(null!);
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// Assert
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await act.Should().ThrowAsync<ArgumentException>();
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}
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[Fact]
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public async Task LoadBundleAsync_EmptyPath_ThrowsArgumentException()
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{
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// Act
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var act = () => _verifier.LoadBundleAsync(string.Empty);
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// Assert
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await act.Should().ThrowAsync<ArgumentException>();
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}
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[Fact]
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public async Task LoadBundleAsync_WithMetadata_ParsesBundleInfo()
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{
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// Arrange - metadata was created in SetupTestBundle
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// Act
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var bundle = await _verifier.LoadBundleAsync(_testBundlePath);
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// Assert
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bundle.Version.Should().Be("1.0.0-test");
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bundle.BundleCreatedAt.Should().BeCloseTo(_fixedTime.AddDays(-1), TimeSpan.FromSeconds(1));
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bundle.BundleExpiresAt.Should().BeCloseTo(_fixedTime.AddDays(365), TimeSpan.FromSeconds(1));
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}
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#endregion
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#region TrustRootBundle Tests
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[Fact]
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public void TrustRootBundle_IsExpired_ReturnsTrueForExpiredBundle()
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{
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// Arrange
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var bundle = CreateExpiredBundle();
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// Act
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var isExpired = bundle.IsExpired(_fixedTime);
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// Assert
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isExpired.Should().BeTrue();
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}
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[Fact]
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public void TrustRootBundle_IsExpired_ReturnsFalseForValidBundle()
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{
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// Arrange
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var bundle = CreateValidBundle();
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// Act
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var isExpired = bundle.IsExpired(_fixedTime);
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// Assert
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isExpired.Should().BeFalse();
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}
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#endregion
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#region Integration Tests
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[Fact]
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public async Task VerifyOfflineAsync_ChainWithExpiredAttestation_ReturnsPartiallyVerified()
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{
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// Arrange
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var chain = new AttestationChain
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{
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ChainId = "test-chain",
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ScanId = "scan-001",
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FindingId = "CVE-2024-0001",
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RootDigest = "sha256:abc123",
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Attestations = ImmutableList.Create(new ChainAttestation
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{
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Type = AttestationType.Sbom,
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AttestationId = "att-001",
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CreatedAt = _fixedTime.AddDays(-30),
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ExpiresAt = _fixedTime.AddDays(-1), // Expired
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Verified = true,
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VerificationStatus = AttestationVerificationStatus.Expired,
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SubjectDigest = "sha256:abc123",
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PredicateType = "https://slsa.dev/provenance/v1"
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}),
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Verified = false,
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VerifiedAt = _fixedTime,
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Status = ChainStatus.Expired
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};
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var bundle = CreateValidBundle();
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// Act
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var result = await _verifier.VerifyOfflineAsync(chain, bundle);
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// Assert
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result.Status.Should().Be(OfflineChainStatus.Failed);
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result.AttestationDetails.Should().HaveCount(1);
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result.Issues.Should().ContainMatch("*expired*");
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}
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#endregion
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#region Helper Methods
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private void SetupTestBundle()
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{
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Directory.CreateDirectory(_testBundlePath);
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// Create roots directory with test root cert
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var rootsDir = Path.Combine(_testBundlePath, "roots");
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Directory.CreateDirectory(rootsDir);
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File.WriteAllText(
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Path.Combine(rootsDir, "root.pem"),
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ExportCertToPem(_testRootCert));
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// Create keys directory with test public key
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var keysDir = Path.Combine(_testBundlePath, "keys");
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Directory.CreateDirectory(keysDir);
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File.WriteAllText(
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Path.Combine(keysDir, "rekor-pubkey.pem"),
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ExportPublicKeyToPem(_testKey));
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// Create bundle metadata
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var metadata = $$"""
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{
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"createdAt": "{{_fixedTime.AddDays(-1):O}}",
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"expiresAt": "{{_fixedTime.AddDays(365):O}}",
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"version": "1.0.0-test"
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}
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""";
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File.WriteAllText(Path.Combine(_testBundlePath, "bundle.json"), metadata);
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}
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private static AttestationChain CreateEmptyChain() =>
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new()
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{
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ChainId = "empty-chain",
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ScanId = "scan-001",
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FindingId = "CVE-2024-0001",
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RootDigest = "sha256:abc123",
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Attestations = ImmutableList<ChainAttestation>.Empty,
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Verified = false,
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VerifiedAt = DateTimeOffset.UtcNow,
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Status = ChainStatus.Empty
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};
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private static AttestationChain CreateValidChain() =>
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new()
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{
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ChainId = "test-chain",
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ScanId = "scan-001",
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FindingId = "CVE-2024-0001",
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RootDigest = "sha256:abc123",
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Attestations = ImmutableList.Create(new ChainAttestation
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{
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Type = AttestationType.Sbom,
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AttestationId = "att-001",
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CreatedAt = DateTimeOffset.UtcNow.AddDays(-1),
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ExpiresAt = DateTimeOffset.UtcNow.AddDays(30),
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Verified = true,
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VerificationStatus = AttestationVerificationStatus.Valid,
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SubjectDigest = "sha256:abc123",
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PredicateType = "https://slsa.dev/provenance/v1"
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}),
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Verified = true,
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VerifiedAt = DateTimeOffset.UtcNow,
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Status = ChainStatus.Complete
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};
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private TrustRootBundle CreateValidBundle() =>
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new()
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{
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RootCertificates = ImmutableList.Create(_testRootCert),
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IntermediateCertificates = ImmutableList<X509Certificate2>.Empty,
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TrustedTimestamps = ImmutableList<TrustedTimestamp>.Empty,
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TransparencyLogKeys = ImmutableList.Create(new TrustedPublicKey
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{
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KeyId = "test-key",
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PublicKeyPem = ExportPublicKeyToPem(_testKey),
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Algorithm = "ecdsa-p256",
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Purpose = "general"
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}),
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BundleCreatedAt = _fixedTime.AddDays(-1),
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BundleExpiresAt = _fixedTime.AddDays(30),
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BundleDigest = "test-digest-valid"
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};
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private TrustRootBundle CreateExpiredBundle() =>
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new()
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{
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RootCertificates = ImmutableList.Create(_testRootCert),
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IntermediateCertificates = ImmutableList<X509Certificate2>.Empty,
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TrustedTimestamps = ImmutableList<TrustedTimestamp>.Empty,
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TransparencyLogKeys = ImmutableList<TrustedPublicKey>.Empty,
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BundleCreatedAt = _fixedTime.AddDays(-90),
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BundleExpiresAt = _fixedTime.AddDays(-1), // Expired
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BundleDigest = "test-digest-expired"
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};
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private TrustRootBundle CreateBundleWithRoot(X509Certificate2 root) =>
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new()
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{
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RootCertificates = ImmutableList.Create(root),
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IntermediateCertificates = ImmutableList<X509Certificate2>.Empty,
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TrustedTimestamps = ImmutableList<TrustedTimestamp>.Empty,
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TransparencyLogKeys = ImmutableList<TrustedPublicKey>.Empty,
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BundleCreatedAt = _fixedTime.AddDays(-1),
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BundleExpiresAt = _fixedTime.AddDays(365),
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BundleDigest = "test-digest-with-root"
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};
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private static X509Certificate2 CreateSelfSignedCert(string subject, ECDsa key)
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{
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var req = new CertificateRequest(
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subject,
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key,
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HashAlgorithmName.SHA256);
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req.CertificateExtensions.Add(
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new X509BasicConstraintsExtension(
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certificateAuthority: true,
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hasPathLengthConstraint: false,
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pathLengthConstraint: 0,
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critical: true));
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req.CertificateExtensions.Add(
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new X509KeyUsageExtension(
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X509KeyUsageFlags.KeyCertSign | X509KeyUsageFlags.CrlSign,
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critical: true));
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return req.CreateSelfSigned(
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DateTimeOffset.UtcNow.AddDays(-1),
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DateTimeOffset.UtcNow.AddYears(5));
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}
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private static X509Certificate2 CreateSignedCert(
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string subject,
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ECDsa leafKey,
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X509Certificate2 issuerCert,
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ECDsa issuerKey)
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{
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var req = new CertificateRequest(
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subject,
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leafKey,
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HashAlgorithmName.SHA256);
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req.CertificateExtensions.Add(
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new X509BasicConstraintsExtension(
|
|
certificateAuthority: false,
|
|
hasPathLengthConstraint: false,
|
|
pathLengthConstraint: 0,
|
|
critical: true));
|
|
|
|
req.CertificateExtensions.Add(
|
|
new X509KeyUsageExtension(
|
|
X509KeyUsageFlags.DigitalSignature,
|
|
critical: true));
|
|
|
|
// Generate serial number
|
|
var serialNumber = new byte[8];
|
|
using var rng = RandomNumberGenerator.Create();
|
|
rng.GetBytes(serialNumber);
|
|
|
|
return req.Create(
|
|
issuerCert,
|
|
DateTimeOffset.UtcNow.AddDays(-1),
|
|
DateTimeOffset.UtcNow.AddYears(1),
|
|
serialNumber);
|
|
}
|
|
|
|
private static string ExportCertToPem(X509Certificate2 cert)
|
|
{
|
|
var pem = new StringBuilder();
|
|
pem.AppendLine("-----BEGIN CERTIFICATE-----");
|
|
pem.AppendLine(Convert.ToBase64String(cert.RawData, Base64FormattingOptions.InsertLineBreaks));
|
|
pem.AppendLine("-----END CERTIFICATE-----");
|
|
return pem.ToString();
|
|
}
|
|
|
|
private static string ExportPublicKeyToPem(ECDsa key)
|
|
{
|
|
var publicKeyBytes = key.ExportSubjectPublicKeyInfo();
|
|
var pem = new StringBuilder();
|
|
pem.AppendLine("-----BEGIN PUBLIC KEY-----");
|
|
pem.AppendLine(Convert.ToBase64String(publicKeyBytes, Base64FormattingOptions.InsertLineBreaks));
|
|
pem.AppendLine("-----END PUBLIC KEY-----");
|
|
return pem.ToString();
|
|
}
|
|
|
|
#endregion
|
|
}
|