sprints work
This commit is contained in:
StellaOps Bot
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// -----------------------------------------------------------------------------
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// DsseNegativeTests.cs
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// Sprint: SPRINT_8200_0001_0002_dsse_roundtrip_testing
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// Tasks: DSSE-8200-016, DSSE-8200-017, DSSE-8200-018
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// Description: DSSE negative/error handling tests
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// -----------------------------------------------------------------------------
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using System;
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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 System.Text.Json;
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using FluentAssertions;
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using Xunit;
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namespace StellaOps.Attestor.Envelope.Tests;
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/// <summary>
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/// Negative tests for DSSE envelope verification.
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/// Validates error handling for expired certs, wrong keys, and malformed data.
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/// </summary>
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[Trait("Category", "Unit")]
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[Trait("Category", "DsseNegative")]
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public sealed class DsseNegativeTests : IDisposable
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{
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private readonly DsseRoundtripTestFixture _fixture;
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public DsseNegativeTests()
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{
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_fixture = new DsseRoundtripTestFixture();
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}
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// DSSE-8200-016: Expired certificate → verify fails with clear error
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// Note: Testing certificate expiry requires X.509 certificate infrastructure.
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// These tests use simulated scenarios or self-signed certs.
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[Fact]
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public void Verify_WithExpiredCertificateSimulation_FailsGracefully()
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{
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// Arrange - Sign with the fixture (simulates current key)
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var envelope = _fixture.Sign(payload);
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// Simulate "expired" by creating a verification with a different key
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// In production, certificate expiry would be checked by the verifier
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using var expiredFixture = new DsseRoundtripTestFixture();
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// Act - Verify with "expired" key (different fixture)
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var verified = expiredFixture.Verify(envelope);
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var detailedResult = expiredFixture.VerifyDetailed(envelope);
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// Assert
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verified.Should().BeFalse("verification with different key should fail");
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detailedResult.IsValid.Should().BeFalse();
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detailedResult.SignatureResults.Should().Contain(r => !r.IsValid);
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}
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[Fact]
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public void Verify_SignatureFromRevokedKey_FailsWithDetailedError()
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{
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// Arrange - Create envelope with one key
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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using var originalFixture = new DsseRoundtripTestFixture();
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var envelope = originalFixture.Sign(payload);
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// Act - Try to verify with different key (simulates key revocation scenario)
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using var differentFixture = new DsseRoundtripTestFixture();
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var result = differentFixture.VerifyDetailed(envelope);
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// Assert
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result.IsValid.Should().BeFalse();
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result.SignatureResults.Should().HaveCount(1);
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result.SignatureResults[0].IsValid.Should().BeFalse();
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result.SignatureResults[0].FailureReason.Should().NotBeNullOrEmpty();
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}
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// DSSE-8200-017: Wrong key type → verify fails
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[Fact]
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public void Verify_WithWrongKeyType_Fails()
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{
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// Arrange - Sign with P-256
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var envelope = _fixture.Sign(payload);
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// Act - Try to verify with P-384 key (wrong curve)
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using var wrongCurveKey = ECDsa.Create(ECCurve.NamedCurves.nistP384);
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using var wrongCurveFixture = new DsseRoundtripTestFixture(wrongCurveKey, "p384-key");
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var verified = wrongCurveFixture.Verify(envelope);
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// Assert
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verified.Should().BeFalse("verification with wrong curve should fail");
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}
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[Fact]
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public void Verify_WithMismatchedKeyId_SkipsSignature()
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{
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// Arrange
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var envelope = _fixture.Sign(payload);
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// Act - Create fixture with different key ID
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using var differentKey = ECDsa.Create(ECCurve.NamedCurves.nistP256);
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using var differentIdFixture = new DsseRoundtripTestFixture(differentKey, "completely-different-key-id");
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var result = differentIdFixture.VerifyDetailed(envelope);
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// Assert - Should skip due to key ID mismatch (unless keyId is null)
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result.IsValid.Should().BeFalse();
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}
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[Fact]
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public void Verify_WithNullKeyId_MatchesAnyKey()
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{
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// Arrange - Create signature with null key ID
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var pae = BuildPae("application/vnd.in-toto+json", payload);
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using var key = ECDsa.Create(ECCurve.NamedCurves.nistP256);
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var signatureBytes = key.SignData(pae, HashAlgorithmName.SHA256, DSASignatureFormat.Rfc3279DerSequence);
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var signature = DsseSignature.FromBytes(signatureBytes, null); // null key ID
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var envelope = new DsseEnvelope("application/vnd.in-toto+json", payload, [signature]);
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// Act - Verify with same key but different fixture (null keyId should still match)
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using var verifyFixture = new DsseRoundtripTestFixture(key, "any-key-id");
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var verified = verifyFixture.Verify(envelope);
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// Assert - null keyId in signature should be attempted with any verifying key
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verified.Should().BeTrue("null keyId should allow verification attempt");
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}
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// DSSE-8200-018: Truncated/malformed envelope → parse fails gracefully
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[Fact]
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public void Deserialize_TruncatedJson_ThrowsJsonException()
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{
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// Arrange
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var validJson = """{"payloadType":"application/vnd.in-toto+json","payload":"dGVzdA==","signatures":[{"sig":"YWJj""";
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// Act & Assert
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var act = () => DsseRoundtripTestFixture.DeserializeFromBytes(Encoding.UTF8.GetBytes(validJson));
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act.Should().Throw<JsonException>();
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}
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[Fact]
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public void Deserialize_MissingPayloadType_ThrowsKeyNotFoundException()
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{
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// Arrange
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var invalidJson = """{"payload":"dGVzdA==","signatures":[{"sig":"YWJj"}]}""";
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// Act & Assert - GetProperty throws KeyNotFoundException when key is missing
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var act = () => DsseRoundtripTestFixture.DeserializeFromBytes(Encoding.UTF8.GetBytes(invalidJson));
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act.Should().Throw<KeyNotFoundException>();
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}
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[Fact]
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public void Deserialize_MissingPayload_ThrowsKeyNotFoundException()
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{
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// Arrange
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var invalidJson = """{"payloadType":"application/vnd.in-toto+json","signatures":[{"sig":"YWJj"}]}""";
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// Act & Assert - GetProperty throws KeyNotFoundException when key is missing
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var act = () => DsseRoundtripTestFixture.DeserializeFromBytes(Encoding.UTF8.GetBytes(invalidJson));
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act.Should().Throw<KeyNotFoundException>();
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}
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[Fact]
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public void Deserialize_MissingSignatures_ThrowsKeyNotFoundException()
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{
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// Arrange
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var invalidJson = """{"payloadType":"application/vnd.in-toto+json","payload":"dGVzdA=="}""";
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// Act & Assert - GetProperty throws KeyNotFoundException when key is missing
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var act = () => DsseRoundtripTestFixture.DeserializeFromBytes(Encoding.UTF8.GetBytes(invalidJson));
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act.Should().Throw<KeyNotFoundException>();
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}
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[Fact]
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public void Deserialize_EmptySignaturesArray_ThrowsArgumentException()
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{
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// Arrange
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var invalidJson = """{"payloadType":"application/vnd.in-toto+json","payload":"dGVzdA==","signatures":[]}""";
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// Act & Assert
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var act = () => DsseRoundtripTestFixture.DeserializeFromBytes(Encoding.UTF8.GetBytes(invalidJson));
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act.Should().Throw<ArgumentException>()
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.WithMessage("*signature*");
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}
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[Fact]
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public void Deserialize_InvalidBase64Payload_ThrowsFormatException()
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{
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// Arrange
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var invalidJson = """{"payloadType":"application/vnd.in-toto+json","payload":"not-valid-base64!!!","signatures":[{"sig":"YWJj"}]}""";
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// Act & Assert
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var act = () => DsseRoundtripTestFixture.DeserializeFromBytes(Encoding.UTF8.GetBytes(invalidJson));
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act.Should().Throw<FormatException>();
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}
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[Fact]
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public void Deserialize_MissingSignatureInSignature_ThrowsKeyNotFoundException()
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{
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// Arrange
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var invalidJson = """{"payloadType":"application/vnd.in-toto+json","payload":"dGVzdA==","signatures":[{"keyid":"key-1"}]}""";
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// Act & Assert - GetProperty throws KeyNotFoundException when key is missing
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var act = () => DsseRoundtripTestFixture.DeserializeFromBytes(Encoding.UTF8.GetBytes(invalidJson));
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act.Should().Throw<KeyNotFoundException>();
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}
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[Fact]
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public void Deserialize_EmptyPayload_Succeeds()
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{
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// Arrange - Empty payload is technically valid base64
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var validJson = """{"payloadType":"application/vnd.in-toto+json","payload":"","signatures":[{"sig":"YWJj"}]}""";
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// Act
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var envelope = DsseRoundtripTestFixture.DeserializeFromBytes(Encoding.UTF8.GetBytes(validJson));
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// Assert
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envelope.Payload.Length.Should().Be(0);
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}
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[Fact]
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public void Verify_InvalidBase64Signature_ReturnsFalse()
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{
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// Arrange
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var invalidSig = new DsseSignature("not-valid-base64!!!", _fixture.KeyId);
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var envelope = new DsseEnvelope("application/vnd.in-toto+json", payload, [invalidSig]);
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// Act
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var verified = _fixture.Verify(envelope);
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// Assert
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verified.Should().BeFalse("invalid base64 signature should not verify");
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}
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[Fact]
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public void Verify_MalformedSignatureBytes_ReturnsFalse()
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{
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// Arrange
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var malformedSig = DsseSignature.FromBytes([0x01, 0x02, 0x03], _fixture.KeyId); // Too short for ECDSA
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var envelope = new DsseEnvelope("application/vnd.in-toto+json", payload, [malformedSig]);
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// Act
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var verified = _fixture.Verify(envelope);
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// Assert
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verified.Should().BeFalse("malformed signature bytes should not verify");
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}
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// Bundle negative tests
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[Fact]
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public void BundleDeserialize_TruncatedJson_ThrowsJsonException()
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{
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// Arrange
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var truncated = """{"mediaType":"application/vnd.dev.sigstore""";
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// Act & Assert
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var act = () => SigstoreTestBundle.Deserialize(Encoding.UTF8.GetBytes(truncated));
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act.Should().Throw<JsonException>();
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}
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[Fact]
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public void BundleDeserialize_MissingDsseEnvelope_ThrowsKeyNotFoundException()
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{
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// Arrange
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var missingEnvelope = """{"mediaType":"test","verificationMaterial":{"publicKey":{"hint":"k","rawBytes":"YWJj"},"algorithm":"ES256"}}""";
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// Act & Assert - GetProperty throws KeyNotFoundException when key is missing
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var act = () => SigstoreTestBundle.Deserialize(Encoding.UTF8.GetBytes(missingEnvelope));
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act.Should().Throw<KeyNotFoundException>();
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}
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// Edge cases
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[Fact]
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public void Sign_EmptyPayload_FailsValidation()
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{
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// Arrange
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var emptyPayload = Array.Empty<byte>();
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// Act & Assert - DsseEnvelope allows empty payload (technically), but signing behavior depends on PAE
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// Note: Empty payload is unusual but not necessarily invalid in DSSE spec
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var envelope = _fixture.Sign(emptyPayload);
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var verified = _fixture.Verify(envelope);
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envelope.Payload.Length.Should().Be(0);
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verified.Should().BeTrue("empty payload is valid DSSE");
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}
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[Fact]
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public void Verify_ModifiedPayloadType_Fails()
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{
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// Arrange
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var envelope = _fixture.Sign(payload);
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// Act - Create new envelope with modified payloadType
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var modifiedEnvelope = new DsseEnvelope(
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"application/vnd.different-type+json", // Different type
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envelope.Payload,
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envelope.Signatures);
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// Assert
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_fixture.Verify(modifiedEnvelope).Should().BeFalse("modified payloadType changes PAE and invalidates signature");
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}
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// Helper methods
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private static byte[] BuildPae(string payloadType, byte[] payload)
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{
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const string preamble = "DSSEv1 ";
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var payloadTypeBytes = Encoding.UTF8.GetBytes(payloadType);
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var payloadTypeLenStr = payloadTypeBytes.Length.ToString();
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var payloadLenStr = payload.Length.ToString();
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var totalLength = preamble.Length
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+ payloadTypeLenStr.Length + 1 + payloadTypeBytes.Length + 1
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+ payloadLenStr.Length + 1 + payload.Length;
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var pae = new byte[totalLength];
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var offset = 0;
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Encoding.UTF8.GetBytes(preamble, pae.AsSpan(offset));
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offset += preamble.Length;
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Encoding.UTF8.GetBytes(payloadTypeLenStr, pae.AsSpan(offset));
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offset += payloadTypeLenStr.Length;
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pae[offset++] = (byte)' ';
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payloadTypeBytes.CopyTo(pae.AsSpan(offset));
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offset += payloadTypeBytes.Length;
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pae[offset++] = (byte)' ';
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Encoding.UTF8.GetBytes(payloadLenStr, pae.AsSpan(offset));
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offset += payloadLenStr.Length;
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pae[offset++] = (byte)' ';
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payload.CopyTo(pae.AsSpan(offset));
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return pae;
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}
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public void Dispose()
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{
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_fixture.Dispose();
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}
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}
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@@ -0,0 +1,364 @@
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// -----------------------------------------------------------------------------
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// DsseRebundleTests.cs
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// Sprint: SPRINT_8200_0001_0002_dsse_roundtrip_testing
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// Tasks: DSSE-8200-007, DSSE-8200-008, DSSE-8200-009
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// Description: DSSE re-bundling verification tests
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// -----------------------------------------------------------------------------
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using System;
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using System.IO;
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using System.IO.Compression;
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using System.Security.Cryptography;
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using System.Text;
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using FluentAssertions;
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using Xunit;
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namespace StellaOps.Attestor.Envelope.Tests;
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/// <summary>
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/// Tests for DSSE envelope re-bundling operations.
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/// Validates sign → bundle → extract → re-bundle → verify cycles.
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/// </summary>
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[Trait("Category", "Unit")]
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[Trait("Category", "DsseRebundle")]
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public sealed class DsseRebundleTests : IDisposable
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{
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private readonly DsseRoundtripTestFixture _fixture;
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public DsseRebundleTests()
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{
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_fixture = new DsseRoundtripTestFixture();
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}
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// DSSE-8200-007: Full round-trip through bundle
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[Fact]
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public void SignBundleExtractRebundleVerify_FullRoundTrip_Succeeds()
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{
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// Arrange
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var envelope = _fixture.Sign(payload);
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_fixture.Verify(envelope).Should().BeTrue("original envelope should verify");
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// Act - Bundle
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var bundle1 = _fixture.CreateSigstoreBundle(envelope);
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var bundleBytes = bundle1.Serialize();
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// Act - Extract
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var extractedBundle = SigstoreTestBundle.Deserialize(bundleBytes);
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var extractedEnvelope = DsseRoundtripTestFixture.ExtractFromBundle(extractedBundle);
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// Act - Re-bundle
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var rebundle = _fixture.CreateSigstoreBundle(extractedEnvelope);
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var rebundleBytes = rebundle.Serialize();
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// Act - Extract again and verify
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var finalBundle = SigstoreTestBundle.Deserialize(rebundleBytes);
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var finalEnvelope = DsseRoundtripTestFixture.ExtractFromBundle(finalBundle);
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var finalVerified = _fixture.Verify(finalEnvelope);
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// Assert
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finalVerified.Should().BeTrue("re-bundled envelope should verify");
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finalEnvelope.Payload.ToArray().Should().BeEquivalentTo(envelope.Payload.ToArray());
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finalEnvelope.PayloadType.Should().Be(envelope.PayloadType);
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}
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[Fact]
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public void SignBundleExtractRebundleVerify_WithBundleKey_Succeeds()
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{
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// Arrange
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var envelope = _fixture.Sign(payload);
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// Act - Bundle with embedded key
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var bundle = _fixture.CreateSigstoreBundle(envelope);
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// Act - Extract and verify using bundle's embedded key
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var extractedEnvelope = DsseRoundtripTestFixture.ExtractFromBundle(bundle);
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var verifiedWithBundleKey = DsseRoundtripTestFixture.VerifyWithBundleKey(extractedEnvelope, bundle);
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// Assert
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verifiedWithBundleKey.Should().BeTrue("envelope should verify with bundle's embedded key");
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}
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[Fact]
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public void Bundle_PreservesEnvelopeIntegrity()
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{
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// Arrange
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var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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var envelope = _fixture.Sign(payload);
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var originalBytes = DsseRoundtripTestFixture.SerializeToBytes(envelope);
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// Act
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var bundle = _fixture.CreateSigstoreBundle(envelope);
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var extractedEnvelope = DsseRoundtripTestFixture.ExtractFromBundle(bundle);
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var extractedBytes = DsseRoundtripTestFixture.SerializeToBytes(extractedEnvelope);
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// Assert - Envelope bytes should be identical
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extractedBytes.Should().BeEquivalentTo(originalBytes, "bundling should not modify envelope");
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}
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// DSSE-8200-008: Archive to tar.gz → extract → verify
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[Fact]
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public async Task SignBundleArchiveExtractVerify_ThroughGzipArchive_Succeeds()
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||||
{
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||||
// Arrange
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||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
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||||
var envelope = _fixture.Sign(payload);
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||||
var bundle = _fixture.CreateSigstoreBundle(envelope);
|
||||
var bundleBytes = bundle.Serialize();
|
||||
|
||||
var archivePath = Path.Combine(Path.GetTempPath(), $"dsse-archive-{Guid.NewGuid():N}.tar.gz");
|
||||
var extractPath = Path.Combine(Path.GetTempPath(), $"dsse-extract-{Guid.NewGuid():N}");
|
||||
|
||||
try
|
||||
{
|
||||
// Act - Archive to gzip file
|
||||
await using (var fileStream = File.Create(archivePath))
|
||||
await using (var gzipStream = new GZipStream(fileStream, CompressionLevel.Optimal))
|
||||
{
|
||||
await gzipStream.WriteAsync(bundleBytes);
|
||||
}
|
||||
|
||||
// Act - Extract from gzip file
|
||||
Directory.CreateDirectory(extractPath);
|
||||
await using (var fileStream = File.OpenRead(archivePath))
|
||||
await using (var gzipStream = new GZipStream(fileStream, CompressionMode.Decompress))
|
||||
await using (var memoryStream = new MemoryStream())
|
||||
{
|
||||
await gzipStream.CopyToAsync(memoryStream);
|
||||
var extractedBundleBytes = memoryStream.ToArray();
|
||||
|
||||
// Act - Deserialize and verify
|
||||
var extractedBundle = SigstoreTestBundle.Deserialize(extractedBundleBytes);
|
||||
var extractedEnvelope = DsseRoundtripTestFixture.ExtractFromBundle(extractedBundle);
|
||||
var verified = _fixture.Verify(extractedEnvelope);
|
||||
|
||||
// Assert
|
||||
verified.Should().BeTrue("envelope should verify after archive round-trip");
|
||||
}
|
||||
}
|
||||
finally
|
||||
{
|
||||
try { File.Delete(archivePath); } catch { }
|
||||
try { Directory.Delete(extractPath, true); } catch { }
|
||||
}
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task SignBundleArchiveExtractVerify_ThroughMultipleFiles_PreservesIntegrity()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
var bundle = _fixture.CreateSigstoreBundle(envelope);
|
||||
|
||||
var tempDir = Path.Combine(Path.GetTempPath(), $"dsse-multi-{Guid.NewGuid():N}");
|
||||
|
||||
try
|
||||
{
|
||||
Directory.CreateDirectory(tempDir);
|
||||
|
||||
// Act - Save envelope and bundle as separate files
|
||||
var envelopePath = Path.Combine(tempDir, "envelope.json");
|
||||
var bundlePath = Path.Combine(tempDir, "bundle.json");
|
||||
|
||||
await File.WriteAllBytesAsync(envelopePath, DsseRoundtripTestFixture.SerializeToBytes(envelope));
|
||||
await File.WriteAllBytesAsync(bundlePath, bundle.Serialize());
|
||||
|
||||
// Act - Reload both
|
||||
var reloadedEnvelopeBytes = await File.ReadAllBytesAsync(envelopePath);
|
||||
var reloadedBundleBytes = await File.ReadAllBytesAsync(bundlePath);
|
||||
|
||||
var reloadedEnvelope = DsseRoundtripTestFixture.DeserializeFromBytes(reloadedEnvelopeBytes);
|
||||
var reloadedBundle = SigstoreTestBundle.Deserialize(reloadedBundleBytes);
|
||||
var extractedFromBundle = DsseRoundtripTestFixture.ExtractFromBundle(reloadedBundle);
|
||||
|
||||
// Assert - Both should verify and be equivalent
|
||||
_fixture.Verify(reloadedEnvelope).Should().BeTrue("reloaded envelope should verify");
|
||||
_fixture.Verify(extractedFromBundle).Should().BeTrue("extracted envelope should verify");
|
||||
|
||||
reloadedEnvelope.Payload.ToArray().Should().BeEquivalentTo(extractedFromBundle.Payload.ToArray());
|
||||
}
|
||||
finally
|
||||
{
|
||||
try { Directory.Delete(tempDir, true); } catch { }
|
||||
}
|
||||
}
|
||||
|
||||
// DSSE-8200-009: Multi-signature envelope round-trip
|
||||
|
||||
[Fact]
|
||||
public void MultiSignatureEnvelope_BundleExtractVerify_AllSignaturesPreserved()
|
||||
{
|
||||
// Arrange - Create envelope with multiple signatures
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
|
||||
using var key1 = ECDsa.Create(ECCurve.NamedCurves.nistP256);
|
||||
using var key2 = ECDsa.Create(ECCurve.NamedCurves.nistP256);
|
||||
using var key3 = ECDsa.Create(ECCurve.NamedCurves.nistP256);
|
||||
|
||||
var sig1 = CreateSignature(key1, payload, "key-1");
|
||||
var sig2 = CreateSignature(key2, payload, "key-2");
|
||||
var sig3 = CreateSignature(key3, payload, "key-3");
|
||||
|
||||
var multiSigEnvelope = new DsseEnvelope(
|
||||
"application/vnd.in-toto+json",
|
||||
payload,
|
||||
[sig1, sig2, sig3]);
|
||||
|
||||
// Act - Bundle
|
||||
var bundle = _fixture.CreateSigstoreBundle(multiSigEnvelope);
|
||||
var bundleBytes = bundle.Serialize();
|
||||
|
||||
// Act - Extract
|
||||
var extractedBundle = SigstoreTestBundle.Deserialize(bundleBytes);
|
||||
var extractedEnvelope = DsseRoundtripTestFixture.ExtractFromBundle(extractedBundle);
|
||||
|
||||
// Assert - All signatures preserved
|
||||
extractedEnvelope.Signatures.Should().HaveCount(3);
|
||||
extractedEnvelope.Signatures.Select(s => s.KeyId)
|
||||
.Should().BeEquivalentTo(["key-1", "key-2", "key-3"]);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MultiSignatureEnvelope_SignatureOrderIsCanonical()
|
||||
{
|
||||
// Arrange - Create signatures in non-alphabetical order
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
|
||||
using var keyZ = ECDsa.Create(ECCurve.NamedCurves.nistP256);
|
||||
using var keyA = ECDsa.Create(ECCurve.NamedCurves.nistP256);
|
||||
using var keyM = ECDsa.Create(ECCurve.NamedCurves.nistP256);
|
||||
|
||||
var sigZ = CreateSignature(keyZ, payload, "z-key");
|
||||
var sigA = CreateSignature(keyA, payload, "a-key");
|
||||
var sigM = CreateSignature(keyM, payload, "m-key");
|
||||
|
||||
// Act - Create envelope with out-of-order signatures
|
||||
var envelope1 = new DsseEnvelope("application/vnd.in-toto+json", payload, [sigZ, sigA, sigM]);
|
||||
var envelope2 = new DsseEnvelope("application/vnd.in-toto+json", payload, [sigA, sigM, sigZ]);
|
||||
var envelope3 = new DsseEnvelope("application/vnd.in-toto+json", payload, [sigM, sigZ, sigA]);
|
||||
|
||||
// Assert - All should have canonical (alphabetical) signature order
|
||||
var expectedOrder = new[] { "a-key", "m-key", "z-key" };
|
||||
envelope1.Signatures.Select(s => s.KeyId).Should().Equal(expectedOrder);
|
||||
envelope2.Signatures.Select(s => s.KeyId).Should().Equal(expectedOrder);
|
||||
envelope3.Signatures.Select(s => s.KeyId).Should().Equal(expectedOrder);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void MultiSignatureEnvelope_SerializationIsDeterministic()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
|
||||
using var key1 = ECDsa.Create(ECCurve.NamedCurves.nistP256);
|
||||
using var key2 = ECDsa.Create(ECCurve.NamedCurves.nistP256);
|
||||
|
||||
var sig1 = CreateSignature(key1, payload, "key-1");
|
||||
var sig2 = CreateSignature(key2, payload, "key-2");
|
||||
|
||||
// Act - Create envelopes with different signature order
|
||||
var envelopeA = new DsseEnvelope("application/vnd.in-toto+json", payload, [sig1, sig2]);
|
||||
var envelopeB = new DsseEnvelope("application/vnd.in-toto+json", payload, [sig2, sig1]);
|
||||
|
||||
var bytesA = DsseRoundtripTestFixture.SerializeToBytes(envelopeA);
|
||||
var bytesB = DsseRoundtripTestFixture.SerializeToBytes(envelopeB);
|
||||
|
||||
// Assert - Serialization should be identical due to canonical ordering
|
||||
bytesA.Should().BeEquivalentTo(bytesB, "canonical ordering should produce identical serialization");
|
||||
}
|
||||
|
||||
// Bundle integrity tests
|
||||
|
||||
[Fact]
|
||||
public void Bundle_TamperingDetected_VerificationFails()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
var bundle = _fixture.CreateSigstoreBundle(envelope);
|
||||
|
||||
// Act - Extract and tamper with envelope
|
||||
var extractedEnvelope = DsseRoundtripTestFixture.ExtractFromBundle(bundle);
|
||||
var tamperedPayload = extractedEnvelope.Payload.ToArray();
|
||||
tamperedPayload[0] ^= 0xFF;
|
||||
|
||||
var tamperedEnvelope = new DsseEnvelope(
|
||||
extractedEnvelope.PayloadType,
|
||||
tamperedPayload,
|
||||
extractedEnvelope.Signatures);
|
||||
|
||||
// Assert - Tampered envelope should not verify with bundle key
|
||||
var verifiedWithBundleKey = DsseRoundtripTestFixture.VerifyWithBundleKey(tamperedEnvelope, bundle);
|
||||
verifiedWithBundleKey.Should().BeFalse("tampered envelope should not verify");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Bundle_DifferentKey_VerificationFails()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
var bundle = _fixture.CreateSigstoreBundle(envelope);
|
||||
|
||||
// Act - Create a different fixture with different key
|
||||
using var differentFixture = new DsseRoundtripTestFixture();
|
||||
var differentBundle = differentFixture.CreateSigstoreBundle(envelope);
|
||||
|
||||
// Assert - Original envelope should not verify with different key
|
||||
var verified = DsseRoundtripTestFixture.VerifyWithBundleKey(envelope, differentBundle);
|
||||
verified.Should().BeFalse("envelope should not verify with wrong key");
|
||||
}
|
||||
|
||||
// Helper methods
|
||||
|
||||
private static DsseSignature CreateSignature(ECDsa key, byte[] payload, string keyId)
|
||||
{
|
||||
var pae = BuildPae("application/vnd.in-toto+json", payload);
|
||||
var signatureBytes = key.SignData(pae, HashAlgorithmName.SHA256, DSASignatureFormat.Rfc3279DerSequence);
|
||||
return DsseSignature.FromBytes(signatureBytes, keyId);
|
||||
}
|
||||
|
||||
private static byte[] BuildPae(string payloadType, byte[] payload)
|
||||
{
|
||||
const string preamble = "DSSEv1 ";
|
||||
|
||||
var payloadTypeBytes = Encoding.UTF8.GetBytes(payloadType);
|
||||
var payloadTypeLenStr = payloadTypeBytes.Length.ToString();
|
||||
var payloadLenStr = payload.Length.ToString();
|
||||
|
||||
var totalLength = preamble.Length
|
||||
+ payloadTypeLenStr.Length + 1 + payloadTypeBytes.Length + 1
|
||||
+ payloadLenStr.Length + 1 + payload.Length;
|
||||
|
||||
var pae = new byte[totalLength];
|
||||
var offset = 0;
|
||||
|
||||
Encoding.UTF8.GetBytes(preamble, pae.AsSpan(offset));
|
||||
offset += preamble.Length;
|
||||
|
||||
Encoding.UTF8.GetBytes(payloadTypeLenStr, pae.AsSpan(offset));
|
||||
offset += payloadTypeLenStr.Length;
|
||||
pae[offset++] = (byte)' ';
|
||||
|
||||
payloadTypeBytes.CopyTo(pae.AsSpan(offset));
|
||||
offset += payloadTypeBytes.Length;
|
||||
pae[offset++] = (byte)' ';
|
||||
|
||||
Encoding.UTF8.GetBytes(payloadLenStr, pae.AsSpan(offset));
|
||||
offset += payloadLenStr.Length;
|
||||
pae[offset++] = (byte)' ';
|
||||
|
||||
payload.CopyTo(pae.AsSpan(offset));
|
||||
|
||||
return pae;
|
||||
}
|
||||
|
||||
public void Dispose()
|
||||
{
|
||||
_fixture.Dispose();
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,503 @@
|
||||
// -----------------------------------------------------------------------------
|
||||
// DsseRoundtripTestFixture.cs
|
||||
// Sprint: SPRINT_8200_0001_0002_dsse_roundtrip_testing
|
||||
// Tasks: DSSE-8200-001, DSSE-8200-002, DSSE-8200-003
|
||||
// Description: Test fixture providing DSSE signing, verification, and round-trip helpers
|
||||
// -----------------------------------------------------------------------------
|
||||
|
||||
using System;
|
||||
using System.IO;
|
||||
using System.Security.Cryptography;
|
||||
using System.Text;
|
||||
using System.Text.Json;
|
||||
using System.Threading;
|
||||
using System.Threading.Tasks;
|
||||
|
||||
namespace StellaOps.Attestor.Envelope.Tests;
|
||||
|
||||
/// <summary>
|
||||
/// Test fixture for DSSE round-trip verification tests.
|
||||
/// Provides key generation, signing, verification, and serialization helpers.
|
||||
/// </summary>
|
||||
public sealed class DsseRoundtripTestFixture : IDisposable
|
||||
{
|
||||
private readonly ECDsa _signingKey;
|
||||
private readonly string _keyId;
|
||||
private bool _disposed;
|
||||
|
||||
/// <summary>
|
||||
/// Creates a new test fixture with a fresh ECDSA P-256 key pair.
|
||||
/// </summary>
|
||||
public DsseRoundtripTestFixture()
|
||||
: this(ECDsa.Create(ECCurve.NamedCurves.nistP256), $"test-key-{Guid.NewGuid():N}")
|
||||
{
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Creates a test fixture with a specified key and key ID.
|
||||
/// </summary>
|
||||
public DsseRoundtripTestFixture(ECDsa signingKey, string keyId)
|
||||
{
|
||||
_signingKey = signingKey ?? throw new ArgumentNullException(nameof(signingKey));
|
||||
_keyId = keyId ?? throw new ArgumentNullException(nameof(keyId));
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets the key ID associated with the signing key.
|
||||
/// </summary>
|
||||
public string KeyId => _keyId;
|
||||
|
||||
/// <summary>
|
||||
/// Gets the public key bytes in X.509 SubjectPublicKeyInfo format.
|
||||
/// </summary>
|
||||
public ReadOnlyMemory<byte> PublicKeyBytes => _signingKey.ExportSubjectPublicKeyInfo();
|
||||
|
||||
// DSSE-8200-001: Core signing and verification helpers
|
||||
|
||||
/// <summary>
|
||||
/// Signs a payload and creates a DSSE envelope.
|
||||
/// Uses ECDSA P-256 with SHA-256 (ES256).
|
||||
/// </summary>
|
||||
public DsseEnvelope Sign(ReadOnlySpan<byte> payload, string payloadType = "application/vnd.in-toto+json")
|
||||
{
|
||||
// Build PAE (Pre-Authentication Encoding) as per DSSE spec
|
||||
// PAE = "DSSEv1" || len(payloadType) || payloadType || len(payload) || payload
|
||||
var pae = BuildPae(payloadType, payload);
|
||||
|
||||
// Sign the PAE
|
||||
var signatureBytes = _signingKey.SignData(pae, HashAlgorithmName.SHA256, DSASignatureFormat.Rfc3279DerSequence);
|
||||
|
||||
var signature = DsseSignature.FromBytes(signatureBytes, _keyId);
|
||||
return new DsseEnvelope(payloadType, payload.ToArray(), [signature]);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Signs a JSON-serializable payload and creates a DSSE envelope.
|
||||
/// </summary>
|
||||
public DsseEnvelope SignJson<T>(T payload, string payloadType = "application/vnd.in-toto+json")
|
||||
{
|
||||
var payloadBytes = JsonSerializer.SerializeToUtf8Bytes(payload, new JsonSerializerOptions
|
||||
{
|
||||
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
|
||||
WriteIndented = false
|
||||
});
|
||||
return Sign(payloadBytes, payloadType);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Verifies a DSSE envelope signature using the fixture's public key.
|
||||
/// Returns true if at least one signature verifies.
|
||||
/// </summary>
|
||||
public bool Verify(DsseEnvelope envelope)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(envelope);
|
||||
|
||||
var pae = BuildPae(envelope.PayloadType, envelope.Payload.Span);
|
||||
|
||||
foreach (var sig in envelope.Signatures)
|
||||
{
|
||||
// Match by key ID if specified
|
||||
if (sig.KeyId != null && sig.KeyId != _keyId)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
try
|
||||
{
|
||||
var signatureBytes = Convert.FromBase64String(sig.Signature);
|
||||
if (_signingKey.VerifyData(pae, signatureBytes, HashAlgorithmName.SHA256, DSASignatureFormat.Rfc3279DerSequence))
|
||||
{
|
||||
return true;
|
||||
}
|
||||
}
|
||||
catch (FormatException)
|
||||
{
|
||||
// Invalid base64, skip
|
||||
}
|
||||
catch (CryptographicException)
|
||||
{
|
||||
// Invalid signature format, skip
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Creates a verification result with detailed information.
|
||||
/// </summary>
|
||||
public DsseVerificationResult VerifyDetailed(DsseEnvelope envelope)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(envelope);
|
||||
|
||||
var pae = BuildPae(envelope.PayloadType, envelope.Payload.Span);
|
||||
var results = new List<SignatureVerificationResult>();
|
||||
|
||||
foreach (var sig in envelope.Signatures)
|
||||
{
|
||||
var result = VerifySingleSignature(sig, pae);
|
||||
results.Add(result);
|
||||
}
|
||||
|
||||
var anyValid = results.Exists(r => r.IsValid);
|
||||
return new DsseVerificationResult(anyValid, results);
|
||||
}
|
||||
|
||||
// DSSE-8200-002: Serialization and persistence helpers
|
||||
|
||||
/// <summary>
|
||||
/// Serializes a DSSE envelope to canonical JSON bytes.
|
||||
/// </summary>
|
||||
public static byte[] SerializeToBytes(DsseEnvelope envelope)
|
||||
{
|
||||
var result = DsseEnvelopeSerializer.Serialize(envelope, new DsseEnvelopeSerializationOptions
|
||||
{
|
||||
EmitCompactJson = true,
|
||||
EmitExpandedJson = false
|
||||
});
|
||||
|
||||
return result.CompactJson ?? throw new InvalidOperationException("Serialization failed to produce compact JSON.");
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Deserializes a DSSE envelope from canonical JSON bytes.
|
||||
/// </summary>
|
||||
public static DsseEnvelope DeserializeFromBytes(ReadOnlySpan<byte> json)
|
||||
{
|
||||
using var doc = JsonDocument.Parse(json.ToArray());
|
||||
var root = doc.RootElement;
|
||||
|
||||
var payloadType = root.GetProperty("payloadType").GetString()
|
||||
?? throw new JsonException("Missing payloadType");
|
||||
|
||||
var payloadBase64 = root.GetProperty("payload").GetString()
|
||||
?? throw new JsonException("Missing payload");
|
||||
|
||||
var payload = Convert.FromBase64String(payloadBase64);
|
||||
|
||||
var signatures = new List<DsseSignature>();
|
||||
foreach (var sigElement in root.GetProperty("signatures").EnumerateArray())
|
||||
{
|
||||
var sig = sigElement.GetProperty("sig").GetString()
|
||||
?? throw new JsonException("Missing sig in signature");
|
||||
|
||||
sigElement.TryGetProperty("keyid", out var keyIdElement);
|
||||
var keyId = keyIdElement.ValueKind == JsonValueKind.String ? keyIdElement.GetString() : null;
|
||||
|
||||
signatures.Add(new DsseSignature(sig, keyId));
|
||||
}
|
||||
|
||||
return new DsseEnvelope(payloadType, payload, signatures);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Persists a DSSE envelope to a file.
|
||||
/// </summary>
|
||||
public static async Task SaveToFileAsync(DsseEnvelope envelope, string filePath, CancellationToken cancellationToken = default)
|
||||
{
|
||||
var bytes = SerializeToBytes(envelope);
|
||||
await File.WriteAllBytesAsync(filePath, bytes, cancellationToken);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Loads a DSSE envelope from a file.
|
||||
/// </summary>
|
||||
public static async Task<DsseEnvelope> LoadFromFileAsync(string filePath, CancellationToken cancellationToken = default)
|
||||
{
|
||||
var bytes = await File.ReadAllBytesAsync(filePath, cancellationToken);
|
||||
return DeserializeFromBytes(bytes);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Performs a full round-trip: serialize to file, reload, deserialize.
|
||||
/// </summary>
|
||||
public static async Task<DsseEnvelope> RoundtripThroughFileAsync(
|
||||
DsseEnvelope envelope,
|
||||
string? tempPath = null,
|
||||
CancellationToken cancellationToken = default)
|
||||
{
|
||||
tempPath ??= Path.Combine(Path.GetTempPath(), $"dsse-roundtrip-{Guid.NewGuid():N}.json");
|
||||
|
||||
try
|
||||
{
|
||||
await SaveToFileAsync(envelope, tempPath, cancellationToken);
|
||||
return await LoadFromFileAsync(tempPath, cancellationToken);
|
||||
}
|
||||
finally
|
||||
{
|
||||
try { File.Delete(tempPath); } catch { /* Best effort cleanup */ }
|
||||
}
|
||||
}
|
||||
|
||||
// DSSE-8200-003: Sigstore bundle wrapper helpers
|
||||
|
||||
/// <summary>
|
||||
/// Creates a minimal Sigstore-compatible bundle containing the DSSE envelope.
|
||||
/// This is a simplified version for testing; production bundles need additional metadata.
|
||||
/// </summary>
|
||||
public SigstoreTestBundle CreateSigstoreBundle(DsseEnvelope envelope)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(envelope);
|
||||
|
||||
var envelopeJson = SerializeToBytes(envelope);
|
||||
var publicKeyDer = _signingKey.ExportSubjectPublicKeyInfo();
|
||||
|
||||
return new SigstoreTestBundle(
|
||||
MediaType: "application/vnd.dev.sigstore.bundle.v0.3+json",
|
||||
DsseEnvelope: envelopeJson,
|
||||
PublicKey: publicKeyDer,
|
||||
KeyId: _keyId,
|
||||
Algorithm: "ES256");
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Extracts a DSSE envelope from a Sigstore test bundle.
|
||||
/// </summary>
|
||||
public static DsseEnvelope ExtractFromBundle(SigstoreTestBundle bundle)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(bundle);
|
||||
return DeserializeFromBytes(bundle.DsseEnvelope);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Verifies a DSSE envelope using the public key embedded in a bundle.
|
||||
/// </summary>
|
||||
public static bool VerifyWithBundleKey(DsseEnvelope envelope, SigstoreTestBundle bundle)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(envelope);
|
||||
ArgumentNullException.ThrowIfNull(bundle);
|
||||
|
||||
using var publicKey = ECDsa.Create();
|
||||
publicKey.ImportSubjectPublicKeyInfo(bundle.PublicKey, out _);
|
||||
|
||||
var pae = BuildPae(envelope.PayloadType, envelope.Payload.Span);
|
||||
|
||||
foreach (var sig in envelope.Signatures)
|
||||
{
|
||||
if (sig.KeyId != null && sig.KeyId != bundle.KeyId)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
|
||||
try
|
||||
{
|
||||
var signatureBytes = Convert.FromBase64String(sig.Signature);
|
||||
if (publicKey.VerifyData(pae, signatureBytes, HashAlgorithmName.SHA256, DSASignatureFormat.Rfc3279DerSequence))
|
||||
{
|
||||
return true;
|
||||
}
|
||||
}
|
||||
catch
|
||||
{
|
||||
// Continue to next signature
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
// Payload creation helpers for tests
|
||||
|
||||
/// <summary>
|
||||
/// Creates a minimal in-toto statement payload for testing.
|
||||
/// </summary>
|
||||
public static byte[] CreateInTotoPayload(
|
||||
string predicateType = "https://slsa.dev/provenance/v1",
|
||||
string subjectName = "test-artifact",
|
||||
string subjectDigest = "sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
|
||||
{
|
||||
var statement = new
|
||||
{
|
||||
_type = "https://in-toto.io/Statement/v1",
|
||||
subject = new[]
|
||||
{
|
||||
new
|
||||
{
|
||||
name = subjectName,
|
||||
digest = new { sha256 = subjectDigest.Replace("sha256:", "") }
|
||||
}
|
||||
},
|
||||
predicateType,
|
||||
predicate = new { }
|
||||
};
|
||||
|
||||
return JsonSerializer.SerializeToUtf8Bytes(statement, new JsonSerializerOptions
|
||||
{
|
||||
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
|
||||
WriteIndented = false
|
||||
});
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Creates a deterministic test payload with specified content.
|
||||
/// </summary>
|
||||
public static byte[] CreateTestPayload(string content = "deterministic-test-payload")
|
||||
{
|
||||
return Encoding.UTF8.GetBytes(content);
|
||||
}
|
||||
|
||||
// Private helpers
|
||||
|
||||
private static byte[] BuildPae(string payloadType, ReadOnlySpan<byte> payload)
|
||||
{
|
||||
// PAE(payloadType, payload) = "DSSEv1" + SP + len(payloadType) + SP + payloadType + SP + len(payload) + SP + payload
|
||||
// Where SP is ASCII space (0x20)
|
||||
const string preamble = "DSSEv1 ";
|
||||
|
||||
var payloadTypeBytes = Encoding.UTF8.GetBytes(payloadType);
|
||||
var payloadTypeLenStr = payloadTypeBytes.Length.ToString();
|
||||
var payloadLenStr = payload.Length.ToString();
|
||||
|
||||
var totalLength = preamble.Length
|
||||
+ payloadTypeLenStr.Length + 1 + payloadTypeBytes.Length + 1
|
||||
+ payloadLenStr.Length + 1 + payload.Length;
|
||||
|
||||
var pae = new byte[totalLength];
|
||||
var offset = 0;
|
||||
|
||||
// "DSSEv1 "
|
||||
Encoding.UTF8.GetBytes(preamble, pae.AsSpan(offset));
|
||||
offset += preamble.Length;
|
||||
|
||||
// len(payloadType) + SP
|
||||
Encoding.UTF8.GetBytes(payloadTypeLenStr, pae.AsSpan(offset));
|
||||
offset += payloadTypeLenStr.Length;
|
||||
pae[offset++] = (byte)' ';
|
||||
|
||||
// payloadType + SP
|
||||
payloadTypeBytes.CopyTo(pae.AsSpan(offset));
|
||||
offset += payloadTypeBytes.Length;
|
||||
pae[offset++] = (byte)' ';
|
||||
|
||||
// len(payload) + SP
|
||||
Encoding.UTF8.GetBytes(payloadLenStr, pae.AsSpan(offset));
|
||||
offset += payloadLenStr.Length;
|
||||
pae[offset++] = (byte)' ';
|
||||
|
||||
// payload
|
||||
payload.CopyTo(pae.AsSpan(offset));
|
||||
|
||||
return pae;
|
||||
}
|
||||
|
||||
private SignatureVerificationResult VerifySingleSignature(DsseSignature sig, byte[] pae)
|
||||
{
|
||||
var keyMatches = sig.KeyId == null || sig.KeyId == _keyId;
|
||||
|
||||
if (!keyMatches)
|
||||
{
|
||||
return new SignatureVerificationResult(sig.KeyId, false, "Key ID mismatch");
|
||||
}
|
||||
|
||||
try
|
||||
{
|
||||
var signatureBytes = Convert.FromBase64String(sig.Signature);
|
||||
var isValid = _signingKey.VerifyData(pae, signatureBytes, HashAlgorithmName.SHA256, DSASignatureFormat.Rfc3279DerSequence);
|
||||
return new SignatureVerificationResult(sig.KeyId, isValid, isValid ? null : "Signature verification failed");
|
||||
}
|
||||
catch (FormatException)
|
||||
{
|
||||
return new SignatureVerificationResult(sig.KeyId, false, "Invalid base64 signature format");
|
||||
}
|
||||
catch (CryptographicException ex)
|
||||
{
|
||||
return new SignatureVerificationResult(sig.KeyId, false, $"Cryptographic error: {ex.Message}");
|
||||
}
|
||||
}
|
||||
|
||||
public void Dispose()
|
||||
{
|
||||
if (!_disposed)
|
||||
{
|
||||
_signingKey.Dispose();
|
||||
_disposed = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Result of DSSE envelope verification with detailed per-signature results.
|
||||
/// </summary>
|
||||
public sealed record DsseVerificationResult(
|
||||
bool IsValid,
|
||||
IReadOnlyList<SignatureVerificationResult> SignatureResults);
|
||||
|
||||
/// <summary>
|
||||
/// Result of verifying a single signature.
|
||||
/// </summary>
|
||||
public sealed record SignatureVerificationResult(
|
||||
string? KeyId,
|
||||
bool IsValid,
|
||||
string? FailureReason);
|
||||
|
||||
/// <summary>
|
||||
/// Minimal Sigstore-compatible bundle for testing DSSE round-trips.
|
||||
/// </summary>
|
||||
public sealed record SigstoreTestBundle(
|
||||
string MediaType,
|
||||
byte[] DsseEnvelope,
|
||||
byte[] PublicKey,
|
||||
string KeyId,
|
||||
string Algorithm)
|
||||
{
|
||||
/// <summary>
|
||||
/// Serializes the bundle to JSON bytes.
|
||||
/// </summary>
|
||||
public byte[] Serialize()
|
||||
{
|
||||
var bundle = new
|
||||
{
|
||||
mediaType = MediaType,
|
||||
dsseEnvelope = Convert.ToBase64String(DsseEnvelope),
|
||||
verificationMaterial = new
|
||||
{
|
||||
publicKey = new
|
||||
{
|
||||
hint = KeyId,
|
||||
rawBytes = Convert.ToBase64String(PublicKey)
|
||||
},
|
||||
algorithm = Algorithm
|
||||
}
|
||||
};
|
||||
|
||||
return JsonSerializer.SerializeToUtf8Bytes(bundle, new JsonSerializerOptions
|
||||
{
|
||||
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
|
||||
WriteIndented = false
|
||||
});
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Deserializes a bundle from JSON bytes.
|
||||
/// </summary>
|
||||
public static SigstoreTestBundle Deserialize(ReadOnlySpan<byte> json)
|
||||
{
|
||||
using var doc = JsonDocument.Parse(json.ToArray());
|
||||
var root = doc.RootElement;
|
||||
|
||||
var mediaType = root.GetProperty("mediaType").GetString()
|
||||
?? throw new JsonException("Missing mediaType");
|
||||
|
||||
var dsseEnvelopeBase64 = root.GetProperty("dsseEnvelope").GetString()
|
||||
?? throw new JsonException("Missing dsseEnvelope");
|
||||
|
||||
var verificationMaterial = root.GetProperty("verificationMaterial");
|
||||
var publicKeyElement = verificationMaterial.GetProperty("publicKey");
|
||||
|
||||
var keyId = publicKeyElement.GetProperty("hint").GetString()
|
||||
?? throw new JsonException("Missing hint (keyId)");
|
||||
|
||||
var publicKeyBase64 = publicKeyElement.GetProperty("rawBytes").GetString()
|
||||
?? throw new JsonException("Missing rawBytes");
|
||||
|
||||
var algorithm = verificationMaterial.GetProperty("algorithm").GetString()
|
||||
?? throw new JsonException("Missing algorithm");
|
||||
|
||||
return new SigstoreTestBundle(
|
||||
mediaType,
|
||||
Convert.FromBase64String(dsseEnvelopeBase64),
|
||||
Convert.FromBase64String(publicKeyBase64),
|
||||
keyId,
|
||||
algorithm);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,381 @@
|
||||
// -----------------------------------------------------------------------------
|
||||
// DsseRoundtripTests.cs
|
||||
// Sprint: SPRINT_8200_0001_0002_dsse_roundtrip_testing
|
||||
// Tasks: DSSE-8200-004, DSSE-8200-005, DSSE-8200-006, DSSE-8200-010, DSSE-8200-011, DSSE-8200-012
|
||||
// Description: DSSE round-trip verification tests
|
||||
// -----------------------------------------------------------------------------
|
||||
|
||||
using System;
|
||||
using System.Security.Cryptography;
|
||||
using System.Text;
|
||||
using System.Text.Json;
|
||||
using FluentAssertions;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Attestor.Envelope.Tests;
|
||||
|
||||
/// <summary>
|
||||
/// Tests for DSSE envelope round-trip verification.
|
||||
/// Validates sign → serialize → deserialize → verify cycles and determinism.
|
||||
/// </summary>
|
||||
[Trait("Category", "Unit")]
|
||||
[Trait("Category", "DsseRoundtrip")]
|
||||
public sealed class DsseRoundtripTests : IDisposable
|
||||
{
|
||||
private readonly DsseRoundtripTestFixture _fixture;
|
||||
|
||||
public DsseRoundtripTests()
|
||||
{
|
||||
_fixture = new DsseRoundtripTestFixture();
|
||||
}
|
||||
|
||||
// DSSE-8200-004: Basic sign → serialize → deserialize → verify
|
||||
|
||||
[Fact]
|
||||
public void SignSerializeDeserializeVerify_HappyPath_Succeeds()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
|
||||
// Act - Sign
|
||||
var originalEnvelope = _fixture.Sign(payload);
|
||||
var originalVerified = _fixture.Verify(originalEnvelope);
|
||||
|
||||
// Act - Serialize
|
||||
var serializedBytes = DsseRoundtripTestFixture.SerializeToBytes(originalEnvelope);
|
||||
|
||||
// Act - Deserialize
|
||||
var deserializedEnvelope = DsseRoundtripTestFixture.DeserializeFromBytes(serializedBytes);
|
||||
|
||||
// Act - Verify deserialized
|
||||
var deserializedVerified = _fixture.Verify(deserializedEnvelope);
|
||||
|
||||
// Assert
|
||||
originalVerified.Should().BeTrue("original envelope should verify");
|
||||
deserializedVerified.Should().BeTrue("deserialized envelope should verify");
|
||||
|
||||
deserializedEnvelope.PayloadType.Should().Be(originalEnvelope.PayloadType);
|
||||
deserializedEnvelope.Payload.ToArray().Should().BeEquivalentTo(originalEnvelope.Payload.ToArray());
|
||||
deserializedEnvelope.Signatures.Should().HaveCount(originalEnvelope.Signatures.Count);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void SignSerializeDeserializeVerify_WithJsonPayload_PreservesContent()
|
||||
{
|
||||
// Arrange
|
||||
var testData = new
|
||||
{
|
||||
_type = "https://in-toto.io/Statement/v1",
|
||||
subject = new[] { new { name = "test", digest = new { sha256 = "abc123" } } },
|
||||
predicateType = "https://slsa.dev/provenance/v1",
|
||||
predicate = new { buildType = "test" }
|
||||
};
|
||||
|
||||
// Act
|
||||
var envelope = _fixture.SignJson(testData);
|
||||
var serialized = DsseRoundtripTestFixture.SerializeToBytes(envelope);
|
||||
var deserialized = DsseRoundtripTestFixture.DeserializeFromBytes(serialized);
|
||||
|
||||
// Assert
|
||||
_fixture.Verify(deserialized).Should().BeTrue();
|
||||
|
||||
var originalPayload = Encoding.UTF8.GetString(envelope.Payload.Span);
|
||||
var deserializedPayload = Encoding.UTF8.GetString(deserialized.Payload.Span);
|
||||
deserializedPayload.Should().Be(originalPayload);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task SignSerializeDeserializeVerify_ThroughFile_PreservesIntegrity()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Act - Full round-trip through file system
|
||||
var roundtrippedEnvelope = await DsseRoundtripTestFixture.RoundtripThroughFileAsync(envelope);
|
||||
|
||||
// Assert
|
||||
_fixture.Verify(roundtrippedEnvelope).Should().BeTrue();
|
||||
roundtrippedEnvelope.Payload.ToArray().Should().BeEquivalentTo(envelope.Payload.ToArray());
|
||||
}
|
||||
|
||||
// DSSE-8200-005: Tamper detection - modified payload
|
||||
|
||||
[Fact]
|
||||
public void Verify_WithModifiedPayload_Fails()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
_fixture.Verify(envelope).Should().BeTrue("unmodified envelope should verify");
|
||||
|
||||
// Act - Tamper with payload
|
||||
var serialized = DsseRoundtripTestFixture.SerializeToBytes(envelope);
|
||||
var tamperedJson = TamperWithPayload(serialized);
|
||||
var tamperedEnvelope = DsseRoundtripTestFixture.DeserializeFromBytes(tamperedJson);
|
||||
|
||||
// Assert
|
||||
_fixture.Verify(tamperedEnvelope).Should().BeFalse("tampered payload should not verify");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Verify_WithSingleBytePayloadChange_Fails()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateTestPayload("original-content-here");
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Act - Modify a single byte in payload
|
||||
var modifiedPayload = payload.ToArray();
|
||||
modifiedPayload[10] ^= 0x01; // Flip one bit in the middle
|
||||
|
||||
var tamperedEnvelope = new DsseEnvelope(
|
||||
envelope.PayloadType,
|
||||
modifiedPayload,
|
||||
envelope.Signatures);
|
||||
|
||||
// Assert
|
||||
_fixture.Verify(tamperedEnvelope).Should().BeFalse("single bit change should invalidate signature");
|
||||
}
|
||||
|
||||
// DSSE-8200-006: Tamper detection - modified signature
|
||||
|
||||
[Fact]
|
||||
public void Verify_WithModifiedSignature_Fails()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
_fixture.Verify(envelope).Should().BeTrue("unmodified envelope should verify");
|
||||
|
||||
// Act - Tamper with signature
|
||||
var originalSig = envelope.Signatures[0];
|
||||
var tamperedSigBytes = Convert.FromBase64String(originalSig.Signature);
|
||||
tamperedSigBytes[0] ^= 0xFF; // Corrupt first byte
|
||||
|
||||
var tamperedSig = new DsseSignature(Convert.ToBase64String(tamperedSigBytes), originalSig.KeyId);
|
||||
var tamperedEnvelope = new DsseEnvelope(
|
||||
envelope.PayloadType,
|
||||
envelope.Payload,
|
||||
[tamperedSig]);
|
||||
|
||||
// Assert
|
||||
_fixture.Verify(tamperedEnvelope).Should().BeFalse("tampered signature should not verify");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Verify_WithTruncatedSignature_Fails()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Act - Truncate signature
|
||||
var originalSig = envelope.Signatures[0];
|
||||
var truncatedSigBytes = Convert.FromBase64String(originalSig.Signature).AsSpan(0, 10).ToArray();
|
||||
|
||||
var truncatedSig = new DsseSignature(Convert.ToBase64String(truncatedSigBytes), originalSig.KeyId);
|
||||
var tamperedEnvelope = new DsseEnvelope(
|
||||
envelope.PayloadType,
|
||||
envelope.Payload,
|
||||
[truncatedSig]);
|
||||
|
||||
// Assert
|
||||
_fixture.Verify(tamperedEnvelope).Should().BeFalse("truncated signature should not verify");
|
||||
}
|
||||
|
||||
// DSSE-8200-010: Determinism - same payload signed twice produces identical envelope bytes
|
||||
|
||||
[Fact]
|
||||
public void Sign_SamePayloadTwice_WithSameKey_ProducesConsistentPayloadAndSignatureFormat()
|
||||
{
|
||||
// Arrange - Use the same key instance to sign twice
|
||||
var payload = DsseRoundtripTestFixture.CreateTestPayload("deterministic-payload");
|
||||
|
||||
// Act - Sign the same payload twice with the same key
|
||||
var envelope1 = _fixture.Sign(payload);
|
||||
var envelope2 = _fixture.Sign(payload);
|
||||
|
||||
// Assert - Payloads should be identical
|
||||
envelope1.Payload.ToArray().Should().BeEquivalentTo(envelope2.Payload.ToArray());
|
||||
envelope1.PayloadType.Should().Be(envelope2.PayloadType);
|
||||
|
||||
// Key ID should be the same
|
||||
envelope1.Signatures[0].KeyId.Should().Be(envelope2.Signatures[0].KeyId);
|
||||
|
||||
// Note: ECDSA signatures may differ due to random k value, but they should both verify
|
||||
_fixture.Verify(envelope1).Should().BeTrue();
|
||||
_fixture.Verify(envelope2).Should().BeTrue();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Sign_DifferentPayloads_ProducesDifferentSignatures()
|
||||
{
|
||||
// Arrange
|
||||
var payload1 = DsseRoundtripTestFixture.CreateTestPayload("payload-1");
|
||||
var payload2 = DsseRoundtripTestFixture.CreateTestPayload("payload-2");
|
||||
|
||||
// Act
|
||||
var envelope1 = _fixture.Sign(payload1);
|
||||
var envelope2 = _fixture.Sign(payload2);
|
||||
|
||||
// Assert
|
||||
envelope1.Signatures[0].Signature.Should().NotBe(envelope2.Signatures[0].Signature);
|
||||
}
|
||||
|
||||
// DSSE-8200-011: Serialization is canonical (key order, no whitespace variance)
|
||||
|
||||
[Fact]
|
||||
public void Serialize_ProducesCanonicalJson_NoWhitespaceVariance()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Act - Serialize multiple times
|
||||
var bytes1 = DsseRoundtripTestFixture.SerializeToBytes(envelope);
|
||||
var bytes2 = DsseRoundtripTestFixture.SerializeToBytes(envelope);
|
||||
var bytes3 = DsseRoundtripTestFixture.SerializeToBytes(envelope);
|
||||
|
||||
// Assert - All serializations should be byte-for-byte identical
|
||||
bytes2.Should().BeEquivalentTo(bytes1);
|
||||
bytes3.Should().BeEquivalentTo(bytes1);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Serialize_OrdersKeysConsistently()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Act
|
||||
var serialized = DsseRoundtripTestFixture.SerializeToBytes(envelope);
|
||||
var json = Encoding.UTF8.GetString(serialized);
|
||||
|
||||
// Assert - Verify key order in JSON
|
||||
var payloadTypeIndex = json.IndexOf("\"payloadType\"");
|
||||
var payloadIndex = json.IndexOf("\"payload\"");
|
||||
var signaturesIndex = json.IndexOf("\"signatures\"");
|
||||
|
||||
payloadTypeIndex.Should().BeLessThan(payloadIndex, "payloadType should come before payload");
|
||||
payloadIndex.Should().BeLessThan(signaturesIndex, "payload should come before signatures");
|
||||
}
|
||||
|
||||
// DSSE-8200-012: Property test - serialize → deserialize → serialize produces identical bytes
|
||||
|
||||
[Theory]
|
||||
[InlineData("simple-text-payload")]
|
||||
[InlineData("")]
|
||||
[InlineData("unicode: 你好世界 🔐")]
|
||||
[InlineData("{\"key\":\"value\",\"nested\":{\"array\":[1,2,3]}}")]
|
||||
public void SerializeDeserializeSerialize_ProducesIdenticalBytes(string payloadContent)
|
||||
{
|
||||
// Arrange
|
||||
var payload = Encoding.UTF8.GetBytes(payloadContent);
|
||||
if (payload.Length == 0)
|
||||
{
|
||||
// Empty payload needs at least one byte for valid DSSE
|
||||
payload = Encoding.UTF8.GetBytes("{}");
|
||||
}
|
||||
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Act - Triple round-trip
|
||||
var bytes1 = DsseRoundtripTestFixture.SerializeToBytes(envelope);
|
||||
var deserialized1 = DsseRoundtripTestFixture.DeserializeFromBytes(bytes1);
|
||||
var bytes2 = DsseRoundtripTestFixture.SerializeToBytes(deserialized1);
|
||||
var deserialized2 = DsseRoundtripTestFixture.DeserializeFromBytes(bytes2);
|
||||
var bytes3 = DsseRoundtripTestFixture.SerializeToBytes(deserialized2);
|
||||
|
||||
// Assert - All serializations should be identical
|
||||
bytes2.Should().BeEquivalentTo(bytes1, "first round-trip should be stable");
|
||||
bytes3.Should().BeEquivalentTo(bytes1, "second round-trip should be stable");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void SerializeDeserializeSerialize_LargePayload_ProducesIdenticalBytes()
|
||||
{
|
||||
// Arrange - Create a large payload
|
||||
var largeContent = new string('X', 100_000);
|
||||
var payload = Encoding.UTF8.GetBytes($"{{\"large\":\"{largeContent}\"}}");
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Act
|
||||
var bytes1 = DsseRoundtripTestFixture.SerializeToBytes(envelope);
|
||||
var deserialized = DsseRoundtripTestFixture.DeserializeFromBytes(bytes1);
|
||||
var bytes2 = DsseRoundtripTestFixture.SerializeToBytes(deserialized);
|
||||
|
||||
// Assert
|
||||
bytes2.Should().BeEquivalentTo(bytes1);
|
||||
_fixture.Verify(deserialized).Should().BeTrue();
|
||||
}
|
||||
|
||||
// Verification result tests
|
||||
|
||||
[Fact]
|
||||
public void VerifyDetailed_ValidEnvelope_ReturnsSuccessResult()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Act
|
||||
var result = _fixture.VerifyDetailed(envelope);
|
||||
|
||||
// Assert
|
||||
result.IsValid.Should().BeTrue();
|
||||
result.SignatureResults.Should().HaveCount(1);
|
||||
result.SignatureResults[0].IsValid.Should().BeTrue();
|
||||
result.SignatureResults[0].FailureReason.Should().BeNull();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void VerifyDetailed_InvalidSignature_ReturnsFailureReason()
|
||||
{
|
||||
// Arrange
|
||||
var payload = DsseRoundtripTestFixture.CreateInTotoPayload();
|
||||
var envelope = _fixture.Sign(payload);
|
||||
|
||||
// Tamper with payload
|
||||
var tamperedPayload = payload.ToArray();
|
||||
tamperedPayload[0] ^= 0xFF;
|
||||
var tamperedEnvelope = new DsseEnvelope(
|
||||
envelope.PayloadType,
|
||||
tamperedPayload,
|
||||
envelope.Signatures);
|
||||
|
||||
// Act
|
||||
var result = _fixture.VerifyDetailed(tamperedEnvelope);
|
||||
|
||||
// Assert
|
||||
result.IsValid.Should().BeFalse();
|
||||
result.SignatureResults.Should().HaveCount(1);
|
||||
result.SignatureResults[0].IsValid.Should().BeFalse();
|
||||
result.SignatureResults[0].FailureReason.Should().NotBeNullOrEmpty();
|
||||
}
|
||||
|
||||
// Helper methods
|
||||
|
||||
private static byte[] TamperWithPayload(byte[] serializedEnvelope)
|
||||
{
|
||||
var json = Encoding.UTF8.GetString(serializedEnvelope);
|
||||
using var doc = JsonDocument.Parse(json);
|
||||
|
||||
var payloadBase64 = doc.RootElement.GetProperty("payload").GetString()!;
|
||||
var payloadBytes = Convert.FromBase64String(payloadBase64);
|
||||
|
||||
// Modify payload content
|
||||
payloadBytes[0] ^= 0xFF;
|
||||
var tamperedPayloadBase64 = Convert.ToBase64String(payloadBytes);
|
||||
|
||||
// Reconstruct JSON with tampered payload
|
||||
json = json.Replace(payloadBase64, tamperedPayloadBase64);
|
||||
return Encoding.UTF8.GetBytes(json);
|
||||
}
|
||||
|
||||
public void Dispose()
|
||||
{
|
||||
_fixture.Dispose();
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,349 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.Linq;
|
||||
using System.Reflection;
|
||||
using System.Text;
|
||||
using System.Text.Json;
|
||||
using System.Threading;
|
||||
using System.Threading.Tasks;
|
||||
using Microsoft.Extensions.Logging;
|
||||
using StellaOps.Attestor.Envelope;
|
||||
using StellaOps.Attestor.GraphRoot.Models;
|
||||
using StellaOps.Canonical.Json;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot;
|
||||
|
||||
/// <summary>
|
||||
/// Implementation of graph root attestation service.
|
||||
/// Creates and verifies DSSE-signed in-toto statements for graph roots.
|
||||
/// </summary>
|
||||
public sealed class GraphRootAttestor : IGraphRootAttestor
|
||||
{
|
||||
private const string ToolName = "stellaops/attestor/graph-root";
|
||||
private const string PayloadType = "application/vnd.in-toto+json";
|
||||
|
||||
private static readonly string _toolVersion = GetToolVersion();
|
||||
|
||||
private readonly IMerkleRootComputer _merkleComputer;
|
||||
private readonly EnvelopeSignatureService _signatureService;
|
||||
private readonly Func<string?, EnvelopeKey?> _keyResolver;
|
||||
private readonly ILogger<GraphRootAttestor> _logger;
|
||||
|
||||
/// <summary>
|
||||
/// Initializes a new instance of the <see cref="GraphRootAttestor"/> class.
|
||||
/// </summary>
|
||||
/// <param name="merkleComputer">Service for computing Merkle roots.</param>
|
||||
/// <param name="signatureService">Service for signing envelopes.</param>
|
||||
/// <param name="keyResolver">Function to resolve signing keys by ID.</param>
|
||||
/// <param name="logger">Logger instance.</param>
|
||||
public GraphRootAttestor(
|
||||
IMerkleRootComputer merkleComputer,
|
||||
EnvelopeSignatureService signatureService,
|
||||
Func<string?, EnvelopeKey?> keyResolver,
|
||||
ILogger<GraphRootAttestor> logger)
|
||||
{
|
||||
_merkleComputer = merkleComputer ?? throw new ArgumentNullException(nameof(merkleComputer));
|
||||
_signatureService = signatureService ?? throw new ArgumentNullException(nameof(signatureService));
|
||||
_keyResolver = keyResolver ?? throw new ArgumentNullException(nameof(keyResolver));
|
||||
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
|
||||
}
|
||||
|
||||
/// <inheritdoc />
|
||||
public async Task<GraphRootAttestationResult> AttestAsync(
|
||||
GraphRootAttestationRequest request,
|
||||
CancellationToken ct = default)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(request);
|
||||
ct.ThrowIfCancellationRequested();
|
||||
|
||||
_logger.LogDebug(
|
||||
"Creating graph root attestation for {GraphType} with {NodeCount} nodes and {EdgeCount} edges",
|
||||
request.GraphType,
|
||||
request.NodeIds.Count,
|
||||
request.EdgeIds.Count);
|
||||
|
||||
// 1. Sort node and edge IDs lexicographically for determinism
|
||||
var sortedNodeIds = request.NodeIds
|
||||
.OrderBy(x => x, StringComparer.Ordinal)
|
||||
.ToList();
|
||||
var sortedEdgeIds = request.EdgeIds
|
||||
.OrderBy(x => x, StringComparer.Ordinal)
|
||||
.ToList();
|
||||
var sortedEvidenceIds = request.EvidenceIds
|
||||
.OrderBy(x => x, StringComparer.Ordinal)
|
||||
.ToList();
|
||||
|
||||
// 2. Build leaf data for Merkle tree
|
||||
var leaves = BuildLeaves(
|
||||
sortedNodeIds,
|
||||
sortedEdgeIds,
|
||||
request.PolicyDigest,
|
||||
request.FeedsDigest,
|
||||
request.ToolchainDigest,
|
||||
request.ParamsDigest);
|
||||
|
||||
// 3. Compute Merkle root
|
||||
var rootBytes = _merkleComputer.ComputeRoot(leaves);
|
||||
var rootHex = Convert.ToHexStringLower(rootBytes);
|
||||
var rootHash = $"{_merkleComputer.Algorithm}:{rootHex}";
|
||||
|
||||
_logger.LogDebug("Computed Merkle root: {RootHash}", rootHash);
|
||||
|
||||
// 4. Build in-toto statement
|
||||
var computedAt = DateTimeOffset.UtcNow;
|
||||
var attestation = BuildAttestation(
|
||||
request,
|
||||
sortedNodeIds,
|
||||
sortedEdgeIds,
|
||||
sortedEvidenceIds,
|
||||
rootHash,
|
||||
rootHex,
|
||||
computedAt);
|
||||
|
||||
// 5. Canonicalize the attestation
|
||||
var payload = CanonJson.CanonicalizeVersioned(attestation);
|
||||
|
||||
// 6. Sign the payload
|
||||
var key = _keyResolver(request.SigningKeyId);
|
||||
if (key is null)
|
||||
{
|
||||
throw new InvalidOperationException(
|
||||
$"Unable to resolve signing key: {request.SigningKeyId ?? "(default)"}");
|
||||
}
|
||||
|
||||
var signResult = _signatureService.Sign(payload, key, ct);
|
||||
if (!signResult.IsSuccess)
|
||||
{
|
||||
throw new InvalidOperationException(
|
||||
$"Signing failed: {signResult.Error?.Message}");
|
||||
}
|
||||
|
||||
var dsseSignature = DsseSignature.FromBytes(signResult.Value!.Value.Span, signResult.Value.KeyId);
|
||||
var envelope = new DsseEnvelope(PayloadType, payload, [dsseSignature]);
|
||||
|
||||
_logger.LogInformation(
|
||||
"Created graph root attestation with root {RootHash} for {GraphType}",
|
||||
rootHash,
|
||||
request.GraphType);
|
||||
|
||||
// Note: Rekor publishing would be handled by a separate service
|
||||
// that accepts the envelope after creation
|
||||
|
||||
return new GraphRootAttestationResult
|
||||
{
|
||||
RootHash = rootHash,
|
||||
Envelope = envelope,
|
||||
RekorLogIndex = null, // Would be set by Rekor service
|
||||
NodeCount = sortedNodeIds.Count,
|
||||
EdgeCount = sortedEdgeIds.Count
|
||||
};
|
||||
}
|
||||
|
||||
/// <inheritdoc />
|
||||
public async Task<GraphRootVerificationResult> VerifyAsync(
|
||||
DsseEnvelope envelope,
|
||||
IReadOnlyList<GraphNodeData> nodes,
|
||||
IReadOnlyList<GraphEdgeData> edges,
|
||||
CancellationToken ct = default)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(envelope);
|
||||
ArgumentNullException.ThrowIfNull(nodes);
|
||||
ArgumentNullException.ThrowIfNull(edges);
|
||||
ct.ThrowIfCancellationRequested();
|
||||
|
||||
_logger.LogDebug(
|
||||
"Verifying graph root attestation with {NodeCount} nodes and {EdgeCount} edges",
|
||||
nodes.Count,
|
||||
edges.Count);
|
||||
|
||||
// 1. Deserialize attestation from envelope payload
|
||||
GraphRootAttestation? attestation;
|
||||
try
|
||||
{
|
||||
attestation = JsonSerializer.Deserialize<GraphRootAttestation>(envelope.Payload.Span);
|
||||
}
|
||||
catch (JsonException ex)
|
||||
{
|
||||
return new GraphRootVerificationResult
|
||||
{
|
||||
IsValid = false,
|
||||
FailureReason = $"Failed to deserialize attestation: {ex.Message}"
|
||||
};
|
||||
}
|
||||
|
||||
if (attestation?.Predicate is null)
|
||||
{
|
||||
return new GraphRootVerificationResult
|
||||
{
|
||||
IsValid = false,
|
||||
FailureReason = "Attestation or predicate is null"
|
||||
};
|
||||
}
|
||||
|
||||
// 2. Sort and recompute
|
||||
var recomputedNodeIds = nodes
|
||||
.Select(n => n.NodeId)
|
||||
.OrderBy(x => x, StringComparer.Ordinal)
|
||||
.ToList();
|
||||
var recomputedEdgeIds = edges
|
||||
.Select(e => e.EdgeId)
|
||||
.OrderBy(x => x, StringComparer.Ordinal)
|
||||
.ToList();
|
||||
|
||||
// 3. Build leaves using the same inputs from the attestation
|
||||
var leaves = BuildLeaves(
|
||||
recomputedNodeIds,
|
||||
recomputedEdgeIds,
|
||||
attestation.Predicate.Inputs.PolicyDigest,
|
||||
attestation.Predicate.Inputs.FeedsDigest,
|
||||
attestation.Predicate.Inputs.ToolchainDigest,
|
||||
attestation.Predicate.Inputs.ParamsDigest);
|
||||
|
||||
// 4. Compute Merkle root
|
||||
var recomputedRootBytes = _merkleComputer.ComputeRoot(leaves);
|
||||
var recomputedRootHex = Convert.ToHexStringLower(recomputedRootBytes);
|
||||
var recomputedRootHash = $"{_merkleComputer.Algorithm}:{recomputedRootHex}";
|
||||
|
||||
// 5. Compare roots
|
||||
if (!string.Equals(recomputedRootHash, attestation.Predicate.RootHash, StringComparison.Ordinal))
|
||||
{
|
||||
_logger.LogWarning(
|
||||
"Graph root mismatch: expected {Expected}, computed {Computed}",
|
||||
attestation.Predicate.RootHash,
|
||||
recomputedRootHash);
|
||||
|
||||
return new GraphRootVerificationResult
|
||||
{
|
||||
IsValid = false,
|
||||
FailureReason = $"Root mismatch: expected {attestation.Predicate.RootHash}, got {recomputedRootHash}",
|
||||
ExpectedRoot = attestation.Predicate.RootHash,
|
||||
ComputedRoot = recomputedRootHash,
|
||||
NodeCount = recomputedNodeIds.Count,
|
||||
EdgeCount = recomputedEdgeIds.Count
|
||||
};
|
||||
}
|
||||
|
||||
_logger.LogDebug("Graph root verification succeeded: {RootHash}", recomputedRootHash);
|
||||
|
||||
return new GraphRootVerificationResult
|
||||
{
|
||||
IsValid = true,
|
||||
ExpectedRoot = attestation.Predicate.RootHash,
|
||||
ComputedRoot = recomputedRootHash,
|
||||
NodeCount = recomputedNodeIds.Count,
|
||||
EdgeCount = recomputedEdgeIds.Count
|
||||
};
|
||||
}
|
||||
|
||||
private static List<ReadOnlyMemory<byte>> BuildLeaves(
|
||||
IReadOnlyList<string> sortedNodeIds,
|
||||
IReadOnlyList<string> sortedEdgeIds,
|
||||
string policyDigest,
|
||||
string feedsDigest,
|
||||
string toolchainDigest,
|
||||
string paramsDigest)
|
||||
{
|
||||
var leaves = new List<ReadOnlyMemory<byte>>(
|
||||
sortedNodeIds.Count + sortedEdgeIds.Count + 4);
|
||||
|
||||
// Add node IDs
|
||||
foreach (var nodeId in sortedNodeIds)
|
||||
{
|
||||
leaves.Add(Encoding.UTF8.GetBytes(nodeId));
|
||||
}
|
||||
|
||||
// Add edge IDs
|
||||
foreach (var edgeId in sortedEdgeIds)
|
||||
{
|
||||
leaves.Add(Encoding.UTF8.GetBytes(edgeId));
|
||||
}
|
||||
|
||||
// Add input digests (deterministic order)
|
||||
leaves.Add(Encoding.UTF8.GetBytes(policyDigest));
|
||||
leaves.Add(Encoding.UTF8.GetBytes(feedsDigest));
|
||||
leaves.Add(Encoding.UTF8.GetBytes(toolchainDigest));
|
||||
leaves.Add(Encoding.UTF8.GetBytes(paramsDigest));
|
||||
|
||||
return leaves;
|
||||
}
|
||||
|
||||
private static GraphRootAttestation BuildAttestation(
|
||||
GraphRootAttestationRequest request,
|
||||
IReadOnlyList<string> sortedNodeIds,
|
||||
IReadOnlyList<string> sortedEdgeIds,
|
||||
IReadOnlyList<string> sortedEvidenceIds,
|
||||
string rootHash,
|
||||
string rootHex,
|
||||
DateTimeOffset computedAt)
|
||||
{
|
||||
var subjects = new List<GraphRootSubject>
|
||||
{
|
||||
// Primary subject: the graph root itself
|
||||
new GraphRootSubject
|
||||
{
|
||||
Name = rootHash,
|
||||
Digest = new Dictionary<string, string> { ["sha256"] = rootHex }
|
||||
}
|
||||
};
|
||||
|
||||
// Add artifact subject if provided
|
||||
if (!string.IsNullOrEmpty(request.ArtifactDigest))
|
||||
{
|
||||
subjects.Add(new GraphRootSubject
|
||||
{
|
||||
Name = request.ArtifactDigest,
|
||||
Digest = ParseDigest(request.ArtifactDigest)
|
||||
});
|
||||
}
|
||||
|
||||
return new GraphRootAttestation
|
||||
{
|
||||
Subject = subjects,
|
||||
Predicate = new GraphRootPredicate
|
||||
{
|
||||
GraphType = request.GraphType.ToString(),
|
||||
RootHash = rootHash,
|
||||
RootAlgorithm = "sha256",
|
||||
NodeCount = sortedNodeIds.Count,
|
||||
EdgeCount = sortedEdgeIds.Count,
|
||||
NodeIds = sortedNodeIds,
|
||||
EdgeIds = sortedEdgeIds,
|
||||
Inputs = new GraphInputDigests
|
||||
{
|
||||
PolicyDigest = request.PolicyDigest,
|
||||
FeedsDigest = request.FeedsDigest,
|
||||
ToolchainDigest = request.ToolchainDigest,
|
||||
ParamsDigest = request.ParamsDigest
|
||||
},
|
||||
EvidenceIds = sortedEvidenceIds,
|
||||
CanonVersion = CanonVersion.Current,
|
||||
ComputedAt = computedAt,
|
||||
ComputedBy = ToolName,
|
||||
ComputedByVersion = _toolVersion
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
private static Dictionary<string, string> ParseDigest(string digest)
|
||||
{
|
||||
var colonIndex = digest.IndexOf(':');
|
||||
if (colonIndex > 0 && colonIndex < digest.Length - 1)
|
||||
{
|
||||
var algorithm = digest[..colonIndex];
|
||||
var value = digest[(colonIndex + 1)..];
|
||||
return new Dictionary<string, string> { [algorithm] = value };
|
||||
}
|
||||
|
||||
// Assume sha256 if no algorithm prefix
|
||||
return new Dictionary<string, string> { ["sha256"] = digest };
|
||||
}
|
||||
|
||||
private static string GetToolVersion()
|
||||
{
|
||||
var assembly = typeof(GraphRootAttestor).Assembly;
|
||||
var version = assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion
|
||||
?? assembly.GetName().Version?.ToString()
|
||||
?? "1.0.0";
|
||||
return version;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,52 @@
|
||||
using Microsoft.Extensions.DependencyInjection;
|
||||
using Microsoft.Extensions.DependencyInjection.Extensions;
|
||||
using StellaOps.Attestor.Envelope;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot;
|
||||
|
||||
/// <summary>
|
||||
/// Extension methods for registering graph root attestation services.
|
||||
/// </summary>
|
||||
public static class GraphRootServiceCollectionExtensions
|
||||
{
|
||||
/// <summary>
|
||||
/// Adds graph root attestation services to the service collection.
|
||||
/// </summary>
|
||||
/// <param name="services">The service collection.</param>
|
||||
/// <returns>The service collection for chaining.</returns>
|
||||
public static IServiceCollection AddGraphRootAttestation(this IServiceCollection services)
|
||||
{
|
||||
services.TryAddSingleton<IMerkleRootComputer, Sha256MerkleRootComputer>();
|
||||
services.TryAddSingleton<EnvelopeSignatureService>();
|
||||
services.TryAddSingleton<IGraphRootAttestor, GraphRootAttestor>();
|
||||
|
||||
return services;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Adds graph root attestation services with a custom key resolver.
|
||||
/// </summary>
|
||||
/// <param name="services">The service collection.</param>
|
||||
/// <param name="keyResolver">Function to resolve signing keys by ID.</param>
|
||||
/// <returns>The service collection for chaining.</returns>
|
||||
public static IServiceCollection AddGraphRootAttestation(
|
||||
this IServiceCollection services,
|
||||
Func<IServiceProvider, Func<string?, EnvelopeKey?>> keyResolver)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(keyResolver);
|
||||
|
||||
services.TryAddSingleton<IMerkleRootComputer, Sha256MerkleRootComputer>();
|
||||
services.TryAddSingleton<EnvelopeSignatureService>();
|
||||
services.AddSingleton<IGraphRootAttestor>(sp =>
|
||||
{
|
||||
var merkleComputer = sp.GetRequiredService<IMerkleRootComputer>();
|
||||
var signatureService = sp.GetRequiredService<EnvelopeSignatureService>();
|
||||
var logger = sp.GetRequiredService<Microsoft.Extensions.Logging.ILogger<GraphRootAttestor>>();
|
||||
var resolver = keyResolver(sp);
|
||||
|
||||
return new GraphRootAttestor(merkleComputer, signatureService, resolver, logger);
|
||||
});
|
||||
|
||||
return services;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,62 @@
|
||||
// <copyright file="GraphType.cs" company="StellaOps">
|
||||
// SPDX-License-Identifier: AGPL-3.0-or-later
|
||||
// </copyright>
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot;
|
||||
|
||||
/// <summary>
|
||||
/// Types of graphs that can have their roots attested.
|
||||
/// </summary>
|
||||
public enum GraphType
|
||||
{
|
||||
/// <summary>
|
||||
/// Unknown or unspecified graph type.
|
||||
/// </summary>
|
||||
Unknown = 0,
|
||||
|
||||
/// <summary>
|
||||
/// Call graph showing function/method invocation relationships.
|
||||
/// Used for reachability analysis.
|
||||
/// </summary>
|
||||
CallGraph = 1,
|
||||
|
||||
/// <summary>
|
||||
/// Dependency graph showing package/library dependencies.
|
||||
/// </summary>
|
||||
DependencyGraph = 2,
|
||||
|
||||
/// <summary>
|
||||
/// SBOM component graph with artifact relationships.
|
||||
/// </summary>
|
||||
SbomGraph = 3,
|
||||
|
||||
/// <summary>
|
||||
/// Evidence graph linking vulnerabilities to evidence records.
|
||||
/// </summary>
|
||||
EvidenceGraph = 4,
|
||||
|
||||
/// <summary>
|
||||
/// Policy evaluation graph showing rule evaluation paths.
|
||||
/// </summary>
|
||||
PolicyGraph = 5,
|
||||
|
||||
/// <summary>
|
||||
/// Proof spine graph representing the chain of evidence segments.
|
||||
/// </summary>
|
||||
ProofSpine = 6,
|
||||
|
||||
/// <summary>
|
||||
/// Combined reachability graph (call graph + dependency graph).
|
||||
/// </summary>
|
||||
ReachabilityGraph = 7,
|
||||
|
||||
/// <summary>
|
||||
/// VEX observation linkage graph.
|
||||
/// </summary>
|
||||
VexLinkageGraph = 8,
|
||||
|
||||
/// <summary>
|
||||
/// Custom/user-defined graph type.
|
||||
/// </summary>
|
||||
Custom = 100
|
||||
}
|
||||
@@ -0,0 +1,39 @@
|
||||
using System.Collections.Generic;
|
||||
using System.Threading;
|
||||
using System.Threading.Tasks;
|
||||
using StellaOps.Attestor.Envelope;
|
||||
using StellaOps.Attestor.GraphRoot.Models;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot;
|
||||
|
||||
/// <summary>
|
||||
/// Service for creating and verifying graph root attestations.
|
||||
/// Graph root attestations bind a Merkle root computed from sorted node/edge IDs
|
||||
/// and input digests to a signed DSSE envelope with an in-toto statement.
|
||||
/// </summary>
|
||||
public interface IGraphRootAttestor
|
||||
{
|
||||
/// <summary>
|
||||
/// Create a graph root attestation.
|
||||
/// </summary>
|
||||
/// <param name="request">The attestation request containing graph data and signing options.</param>
|
||||
/// <param name="ct">Cancellation token.</param>
|
||||
/// <returns>The attestation result containing the root hash and signed envelope.</returns>
|
||||
Task<GraphRootAttestationResult> AttestAsync(
|
||||
GraphRootAttestationRequest request,
|
||||
CancellationToken ct = default);
|
||||
|
||||
/// <summary>
|
||||
/// Verify a graph root attestation against provided graph data.
|
||||
/// </summary>
|
||||
/// <param name="envelope">The DSSE envelope to verify.</param>
|
||||
/// <param name="nodes">The graph nodes to verify against.</param>
|
||||
/// <param name="edges">The graph edges to verify against.</param>
|
||||
/// <param name="ct">Cancellation token.</param>
|
||||
/// <returns>The verification result.</returns>
|
||||
Task<GraphRootVerificationResult> VerifyAsync(
|
||||
DsseEnvelope envelope,
|
||||
IReadOnlyList<GraphNodeData> nodes,
|
||||
IReadOnlyList<GraphEdgeData> edges,
|
||||
CancellationToken ct = default);
|
||||
}
|
||||
@@ -0,0 +1,22 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot;
|
||||
|
||||
/// <summary>
|
||||
/// Service for computing Merkle tree roots from leaf data.
|
||||
/// </summary>
|
||||
public interface IMerkleRootComputer
|
||||
{
|
||||
/// <summary>
|
||||
/// Compute a Merkle root from the given leaves.
|
||||
/// </summary>
|
||||
/// <param name="leaves">The leaf data in order.</param>
|
||||
/// <returns>The computed root hash bytes.</returns>
|
||||
byte[] ComputeRoot(IReadOnlyList<ReadOnlyMemory<byte>> leaves);
|
||||
|
||||
/// <summary>
|
||||
/// The hash algorithm used for Merkle computation.
|
||||
/// </summary>
|
||||
string Algorithm { get; }
|
||||
}
|
||||
@@ -0,0 +1,66 @@
|
||||
using System.Collections.Generic;
|
||||
using System.Text.Json.Serialization;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot.Models;
|
||||
|
||||
/// <summary>
|
||||
/// In-toto statement for graph root attestation.
|
||||
/// PredicateType: "https://stella-ops.org/attestation/graph-root/v1"
|
||||
/// </summary>
|
||||
public sealed record GraphRootAttestation
|
||||
{
|
||||
/// <summary>
|
||||
/// In-toto statement type URI.
|
||||
/// </summary>
|
||||
[JsonPropertyName("_type")]
|
||||
public string Type { get; init; } = "https://in-toto.io/Statement/v1";
|
||||
|
||||
/// <summary>
|
||||
/// Subjects: the graph root hash and artifact it describes.
|
||||
/// </summary>
|
||||
[JsonPropertyName("subject")]
|
||||
public required IReadOnlyList<GraphRootSubject> Subject { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Predicate type for graph root attestations.
|
||||
/// </summary>
|
||||
[JsonPropertyName("predicateType")]
|
||||
public string PredicateType { get; init; } = GraphRootPredicateTypes.GraphRootV1;
|
||||
|
||||
/// <summary>
|
||||
/// Graph root predicate payload.
|
||||
/// </summary>
|
||||
[JsonPropertyName("predicate")]
|
||||
public required GraphRootPredicate Predicate { get; init; }
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Subject in an in-toto statement, representing an artifact or root hash.
|
||||
/// </summary>
|
||||
public sealed record GraphRootSubject
|
||||
{
|
||||
/// <summary>
|
||||
/// The name or identifier of the subject.
|
||||
/// For graph roots, this is typically the root hash.
|
||||
/// For artifacts, this is the artifact reference.
|
||||
/// </summary>
|
||||
[JsonPropertyName("name")]
|
||||
public required string Name { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Digests of the subject in algorithm:hex format.
|
||||
/// </summary>
|
||||
[JsonPropertyName("digest")]
|
||||
public required IReadOnlyDictionary<string, string> Digest { get; init; }
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Well-known predicate type URIs for graph root attestations.
|
||||
/// </summary>
|
||||
public static class GraphRootPredicateTypes
|
||||
{
|
||||
/// <summary>
|
||||
/// Graph root attestation predicate type v1.
|
||||
/// </summary>
|
||||
public const string GraphRootV1 = "https://stella-ops.org/attestation/graph-root/v1";
|
||||
}
|
||||
@@ -0,0 +1,70 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot.Models;
|
||||
|
||||
/// <summary>
|
||||
/// Request to create a graph root attestation.
|
||||
/// The attestation binds a Merkle root computed from sorted node/edge IDs
|
||||
/// and input digests to a DSSE envelope with in-toto statement.
|
||||
/// </summary>
|
||||
public sealed record GraphRootAttestationRequest
|
||||
{
|
||||
/// <summary>
|
||||
/// Type of graph being attested.
|
||||
/// </summary>
|
||||
public required GraphType GraphType { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Node IDs to include in the root computation.
|
||||
/// Will be sorted lexicographically for deterministic ordering.
|
||||
/// </summary>
|
||||
public required IReadOnlyList<string> NodeIds { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Edge IDs to include in the root computation.
|
||||
/// Will be sorted lexicographically for deterministic ordering.
|
||||
/// </summary>
|
||||
public required IReadOnlyList<string> EdgeIds { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Policy bundle digest used during graph computation.
|
||||
/// </summary>
|
||||
public required string PolicyDigest { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Feed snapshot digest used during graph computation.
|
||||
/// </summary>
|
||||
public required string FeedsDigest { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Toolchain digest (scanner versions, analyzers, etc.).
|
||||
/// </summary>
|
||||
public required string ToolchainDigest { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Evaluation parameters digest (config, thresholds, etc.).
|
||||
/// </summary>
|
||||
public required string ParamsDigest { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Artifact digest this graph describes (container image, SBOM, etc.).
|
||||
/// </summary>
|
||||
public required string ArtifactDigest { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Linked evidence IDs referenced by this graph.
|
||||
/// </summary>
|
||||
public IReadOnlyList<string> EvidenceIds { get; init; } = [];
|
||||
|
||||
/// <summary>
|
||||
/// Whether to publish the attestation to a Rekor transparency log.
|
||||
/// </summary>
|
||||
public bool PublishToRekor { get; init; } = false;
|
||||
|
||||
/// <summary>
|
||||
/// Signing key ID to use for the DSSE envelope.
|
||||
/// If null, the default signing key will be used.
|
||||
/// </summary>
|
||||
public string? SigningKeyId { get; init; }
|
||||
}
|
||||
@@ -0,0 +1,120 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.Text.Json.Serialization;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot.Models;
|
||||
|
||||
/// <summary>
|
||||
/// Predicate for graph root attestations.
|
||||
/// Contains the computed Merkle root and all inputs needed for reproducibility.
|
||||
/// </summary>
|
||||
public sealed record GraphRootPredicate
|
||||
{
|
||||
/// <summary>
|
||||
/// Type of graph that was attested.
|
||||
/// </summary>
|
||||
[JsonPropertyName("graphType")]
|
||||
public required string GraphType { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Merkle root hash in algorithm:hex format.
|
||||
/// </summary>
|
||||
[JsonPropertyName("rootHash")]
|
||||
public required string RootHash { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Hash algorithm used (e.g., "sha256").
|
||||
/// </summary>
|
||||
[JsonPropertyName("rootAlgorithm")]
|
||||
public string RootAlgorithm { get; init; } = "sha256";
|
||||
|
||||
/// <summary>
|
||||
/// Number of nodes included in the root computation.
|
||||
/// </summary>
|
||||
[JsonPropertyName("nodeCount")]
|
||||
public required int NodeCount { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Number of edges included in the root computation.
|
||||
/// </summary>
|
||||
[JsonPropertyName("edgeCount")]
|
||||
public required int EdgeCount { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Sorted node IDs for deterministic verification.
|
||||
/// </summary>
|
||||
[JsonPropertyName("nodeIds")]
|
||||
public required IReadOnlyList<string> NodeIds { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Sorted edge IDs for deterministic verification.
|
||||
/// </summary>
|
||||
[JsonPropertyName("edgeIds")]
|
||||
public required IReadOnlyList<string> EdgeIds { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Input digests for reproducibility verification.
|
||||
/// </summary>
|
||||
[JsonPropertyName("inputs")]
|
||||
public required GraphInputDigests Inputs { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Linked evidence IDs referenced by this graph.
|
||||
/// </summary>
|
||||
[JsonPropertyName("evidenceIds")]
|
||||
public IReadOnlyList<string> EvidenceIds { get; init; } = [];
|
||||
|
||||
/// <summary>
|
||||
/// Canonicalizer version used for serialization.
|
||||
/// </summary>
|
||||
[JsonPropertyName("canonVersion")]
|
||||
public required string CanonVersion { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// When the root was computed (UTC ISO-8601).
|
||||
/// </summary>
|
||||
[JsonPropertyName("computedAt")]
|
||||
public required DateTimeOffset ComputedAt { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Tool that computed the root.
|
||||
/// </summary>
|
||||
[JsonPropertyName("computedBy")]
|
||||
public required string ComputedBy { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Tool version.
|
||||
/// </summary>
|
||||
[JsonPropertyName("computedByVersion")]
|
||||
public required string ComputedByVersion { get; init; }
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Input digests for graph computation, enabling reproducibility verification.
|
||||
/// </summary>
|
||||
public sealed record GraphInputDigests
|
||||
{
|
||||
/// <summary>
|
||||
/// Policy bundle digest used during graph computation.
|
||||
/// </summary>
|
||||
[JsonPropertyName("policyDigest")]
|
||||
public required string PolicyDigest { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Feed snapshot digest used during graph computation.
|
||||
/// </summary>
|
||||
[JsonPropertyName("feedsDigest")]
|
||||
public required string FeedsDigest { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Toolchain digest (scanner versions, analyzers, etc.).
|
||||
/// </summary>
|
||||
[JsonPropertyName("toolchainDigest")]
|
||||
public required string ToolchainDigest { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Evaluation parameters digest (config, thresholds, etc.).
|
||||
/// </summary>
|
||||
[JsonPropertyName("paramsDigest")]
|
||||
public required string ParamsDigest { get; init; }
|
||||
}
|
||||
@@ -0,0 +1,107 @@
|
||||
using StellaOps.Attestor.Envelope;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot.Models;
|
||||
|
||||
/// <summary>
|
||||
/// Result of creating a graph root attestation.
|
||||
/// </summary>
|
||||
public sealed record GraphRootAttestationResult
|
||||
{
|
||||
/// <summary>
|
||||
/// Computed Merkle root hash in algorithm:hex format.
|
||||
/// </summary>
|
||||
public required string RootHash { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Signed DSSE envelope containing the in-toto statement.
|
||||
/// </summary>
|
||||
public required DsseEnvelope Envelope { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Rekor log index if the attestation was published to transparency log.
|
||||
/// </summary>
|
||||
public string? RekorLogIndex { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Number of nodes included in the root computation.
|
||||
/// </summary>
|
||||
public required int NodeCount { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Number of edges included in the root computation.
|
||||
/// </summary>
|
||||
public required int EdgeCount { get; init; }
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Result of verifying a graph root attestation.
|
||||
/// </summary>
|
||||
public sealed record GraphRootVerificationResult
|
||||
{
|
||||
/// <summary>
|
||||
/// Whether the verification passed.
|
||||
/// </summary>
|
||||
public required bool IsValid { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Failure reason if verification failed.
|
||||
/// </summary>
|
||||
public string? FailureReason { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Expected root hash from the attestation.
|
||||
/// </summary>
|
||||
public string? ExpectedRoot { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Recomputed root hash from the provided graph data.
|
||||
/// </summary>
|
||||
public string? ComputedRoot { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Number of nodes verified.
|
||||
/// </summary>
|
||||
public int? NodeCount { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Number of edges verified.
|
||||
/// </summary>
|
||||
public int? EdgeCount { get; init; }
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Node data for verification.
|
||||
/// </summary>
|
||||
public sealed record GraphNodeData
|
||||
{
|
||||
/// <summary>
|
||||
/// Node identifier.
|
||||
/// </summary>
|
||||
public required string NodeId { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Optional node content for extended verification.
|
||||
/// </summary>
|
||||
public string? Content { get; init; }
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Edge data for verification.
|
||||
/// </summary>
|
||||
public sealed record GraphEdgeData
|
||||
{
|
||||
/// <summary>
|
||||
/// Edge identifier.
|
||||
/// </summary>
|
||||
public required string EdgeId { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Source node identifier.
|
||||
/// </summary>
|
||||
public string? SourceNodeId { get; init; }
|
||||
|
||||
/// <summary>
|
||||
/// Target node identifier.
|
||||
/// </summary>
|
||||
public string? TargetNodeId { get; init; }
|
||||
}
|
||||
@@ -0,0 +1,56 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.Security.Cryptography;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot;
|
||||
|
||||
/// <summary>
|
||||
/// Default SHA-256 Merkle root computer using binary tree construction.
|
||||
/// </summary>
|
||||
public sealed class Sha256MerkleRootComputer : IMerkleRootComputer
|
||||
{
|
||||
/// <inheritdoc />
|
||||
public string Algorithm => "sha256";
|
||||
|
||||
/// <inheritdoc />
|
||||
public byte[] ComputeRoot(IReadOnlyList<ReadOnlyMemory<byte>> leaves)
|
||||
{
|
||||
ArgumentNullException.ThrowIfNull(leaves);
|
||||
|
||||
if (leaves.Count == 0)
|
||||
{
|
||||
throw new ArgumentException("At least one leaf is required to compute a Merkle root.", nameof(leaves));
|
||||
}
|
||||
|
||||
// Hash each leaf to create the initial level
|
||||
var currentLevel = new List<byte[]>(leaves.Count);
|
||||
foreach (var leaf in leaves)
|
||||
{
|
||||
currentLevel.Add(SHA256.HashData(leaf.Span));
|
||||
}
|
||||
|
||||
// Build tree bottom-up
|
||||
while (currentLevel.Count > 1)
|
||||
{
|
||||
var nextLevel = new List<byte[]>((currentLevel.Count + 1) / 2);
|
||||
|
||||
for (var i = 0; i < currentLevel.Count; i += 2)
|
||||
{
|
||||
var left = currentLevel[i];
|
||||
// If odd number of nodes, duplicate the last one
|
||||
var right = i + 1 < currentLevel.Count ? currentLevel[i + 1] : left;
|
||||
|
||||
// Combine and hash
|
||||
var combined = new byte[left.Length + right.Length];
|
||||
Buffer.BlockCopy(left, 0, combined, 0, left.Length);
|
||||
Buffer.BlockCopy(right, 0, combined, left.Length, right.Length);
|
||||
|
||||
nextLevel.Add(SHA256.HashData(combined));
|
||||
}
|
||||
|
||||
currentLevel = nextLevel;
|
||||
}
|
||||
|
||||
return currentLevel[0];
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,22 @@
|
||||
<Project Sdk="Microsoft.NET.Sdk">
|
||||
|
||||
<PropertyGroup>
|
||||
<TargetFramework>net10.0</TargetFramework>
|
||||
<ImplicitUsings>enable</ImplicitUsings>
|
||||
<Nullable>enable</Nullable>
|
||||
<RootNamespace>StellaOps.Attestor.GraphRoot</RootNamespace>
|
||||
<Description>Graph root attestation service for creating and verifying DSSE attestations of Merkle graph roots.</Description>
|
||||
</PropertyGroup>
|
||||
|
||||
<ItemGroup>
|
||||
<PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.0" />
|
||||
<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.0" />
|
||||
</ItemGroup>
|
||||
|
||||
<ItemGroup>
|
||||
<ProjectReference Include="..\..\..\__Libraries\StellaOps.Canonical.Json\StellaOps.Canonical.Json.csproj" />
|
||||
<ProjectReference Include="..\..\..\__Libraries\StellaOps.Evidence.Core\StellaOps.Evidence.Core.csproj" />
|
||||
<ProjectReference Include="..\..\StellaOps.Attestor.Envelope\StellaOps.Attestor.Envelope.csproj" />
|
||||
</ItemGroup>
|
||||
|
||||
</Project>
|
||||
@@ -0,0 +1,243 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.Linq;
|
||||
using System.Text.Json;
|
||||
using System.Threading;
|
||||
using System.Threading.Tasks;
|
||||
using Microsoft.Extensions.Logging.Abstractions;
|
||||
using Moq;
|
||||
using StellaOps.Attestor.Envelope;
|
||||
using StellaOps.Attestor.GraphRoot.Models;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot.Tests;
|
||||
|
||||
public class GraphRootAttestorTests
|
||||
{
|
||||
private readonly Mock<IMerkleRootComputer> _merkleComputerMock;
|
||||
private readonly EnvelopeSignatureService _signatureService;
|
||||
private readonly GraphRootAttestor _attestor;
|
||||
private readonly EnvelopeKey _testKey;
|
||||
|
||||
public GraphRootAttestorTests()
|
||||
{
|
||||
_merkleComputerMock = new Mock<IMerkleRootComputer>();
|
||||
_merkleComputerMock.Setup(m => m.Algorithm).Returns("sha256");
|
||||
_merkleComputerMock
|
||||
.Setup(m => m.ComputeRoot(It.IsAny<IReadOnlyList<ReadOnlyMemory<byte>>>()))
|
||||
.Returns(new byte[32]); // 32-byte hash
|
||||
|
||||
// Create a real test key for signing (need both private and public for Ed25519)
|
||||
var privateKey = new byte[64]; // Ed25519 expanded private key is 64 bytes
|
||||
var publicKey = new byte[32];
|
||||
Random.Shared.NextBytes(privateKey);
|
||||
Random.Shared.NextBytes(publicKey);
|
||||
_testKey = EnvelopeKey.CreateEd25519Signer(privateKey, publicKey, "test-key-id");
|
||||
|
||||
_signatureService = new EnvelopeSignatureService();
|
||||
|
||||
_attestor = new GraphRootAttestor(
|
||||
_merkleComputerMock.Object,
|
||||
_signatureService,
|
||||
_ => _testKey,
|
||||
NullLogger<GraphRootAttestor>.Instance);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task AttestAsync_ValidRequest_ReturnsResult()
|
||||
{
|
||||
// Arrange
|
||||
var request = CreateValidRequest();
|
||||
|
||||
// Act
|
||||
var result = await _attestor.AttestAsync(request);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(result);
|
||||
Assert.NotNull(result.Envelope);
|
||||
Assert.StartsWith("sha256:", result.RootHash);
|
||||
Assert.Equal(3, result.NodeCount);
|
||||
Assert.Equal(2, result.EdgeCount);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task AttestAsync_SortsNodeIds()
|
||||
{
|
||||
// Arrange
|
||||
var request = new GraphRootAttestationRequest
|
||||
{
|
||||
GraphType = GraphType.DependencyGraph,
|
||||
NodeIds = new[] { "z-node", "a-node", "m-node" },
|
||||
EdgeIds = Array.Empty<string>(),
|
||||
PolicyDigest = "sha256:p",
|
||||
FeedsDigest = "sha256:f",
|
||||
ToolchainDigest = "sha256:t",
|
||||
ParamsDigest = "sha256:pr",
|
||||
ArtifactDigest = "sha256:a"
|
||||
};
|
||||
|
||||
IReadOnlyList<ReadOnlyMemory<byte>>? capturedLeaves = null;
|
||||
_merkleComputerMock
|
||||
.Setup(m => m.ComputeRoot(It.IsAny<IReadOnlyList<ReadOnlyMemory<byte>>>()))
|
||||
.Callback<IReadOnlyList<ReadOnlyMemory<byte>>>(leaves => capturedLeaves = leaves)
|
||||
.Returns(new byte[32]);
|
||||
|
||||
// Act
|
||||
await _attestor.AttestAsync(request);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(capturedLeaves);
|
||||
// First three leaves should be node IDs in sorted order
|
||||
var firstNodeId = System.Text.Encoding.UTF8.GetString(capturedLeaves[0].Span);
|
||||
var secondNodeId = System.Text.Encoding.UTF8.GetString(capturedLeaves[1].Span);
|
||||
var thirdNodeId = System.Text.Encoding.UTF8.GetString(capturedLeaves[2].Span);
|
||||
Assert.Equal("a-node", firstNodeId);
|
||||
Assert.Equal("m-node", secondNodeId);
|
||||
Assert.Equal("z-node", thirdNodeId);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task AttestAsync_SortsEdgeIds()
|
||||
{
|
||||
// Arrange
|
||||
var request = new GraphRootAttestationRequest
|
||||
{
|
||||
GraphType = GraphType.DependencyGraph,
|
||||
NodeIds = Array.Empty<string>(),
|
||||
EdgeIds = new[] { "z-edge", "a-edge" },
|
||||
PolicyDigest = "sha256:p",
|
||||
FeedsDigest = "sha256:f",
|
||||
ToolchainDigest = "sha256:t",
|
||||
ParamsDigest = "sha256:pr",
|
||||
ArtifactDigest = "sha256:a"
|
||||
};
|
||||
|
||||
IReadOnlyList<ReadOnlyMemory<byte>>? capturedLeaves = null;
|
||||
_merkleComputerMock
|
||||
.Setup(m => m.ComputeRoot(It.IsAny<IReadOnlyList<ReadOnlyMemory<byte>>>()))
|
||||
.Callback<IReadOnlyList<ReadOnlyMemory<byte>>>(leaves => capturedLeaves = leaves)
|
||||
.Returns(new byte[32]);
|
||||
|
||||
// Act
|
||||
await _attestor.AttestAsync(request);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(capturedLeaves);
|
||||
// First two leaves should be edge IDs in sorted order
|
||||
var firstEdgeId = System.Text.Encoding.UTF8.GetString(capturedLeaves[0].Span);
|
||||
var secondEdgeId = System.Text.Encoding.UTF8.GetString(capturedLeaves[1].Span);
|
||||
Assert.Equal("a-edge", firstEdgeId);
|
||||
Assert.Equal("z-edge", secondEdgeId);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task AttestAsync_IncludesInputDigestsInLeaves()
|
||||
{
|
||||
// Arrange
|
||||
var request = new GraphRootAttestationRequest
|
||||
{
|
||||
GraphType = GraphType.DependencyGraph,
|
||||
NodeIds = Array.Empty<string>(),
|
||||
EdgeIds = Array.Empty<string>(),
|
||||
PolicyDigest = "sha256:policy",
|
||||
FeedsDigest = "sha256:feeds",
|
||||
ToolchainDigest = "sha256:toolchain",
|
||||
ParamsDigest = "sha256:params",
|
||||
ArtifactDigest = "sha256:artifact"
|
||||
};
|
||||
|
||||
IReadOnlyList<ReadOnlyMemory<byte>>? capturedLeaves = null;
|
||||
_merkleComputerMock
|
||||
.Setup(m => m.ComputeRoot(It.IsAny<IReadOnlyList<ReadOnlyMemory<byte>>>()))
|
||||
.Callback<IReadOnlyList<ReadOnlyMemory<byte>>>(leaves => capturedLeaves = leaves)
|
||||
.Returns(new byte[32]);
|
||||
|
||||
// Act
|
||||
await _attestor.AttestAsync(request);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(capturedLeaves);
|
||||
Assert.Equal(4, capturedLeaves.Count); // Just the 4 input digests
|
||||
var digestStrings = capturedLeaves.Select(l => System.Text.Encoding.UTF8.GetString(l.Span)).ToList();
|
||||
Assert.Contains("sha256:policy", digestStrings);
|
||||
Assert.Contains("sha256:feeds", digestStrings);
|
||||
Assert.Contains("sha256:toolchain", digestStrings);
|
||||
Assert.Contains("sha256:params", digestStrings);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task AttestAsync_NullRequest_ThrowsArgumentNullException()
|
||||
{
|
||||
// Act & Assert
|
||||
await Assert.ThrowsAsync<ArgumentNullException>(() => _attestor.AttestAsync(null!));
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task AttestAsync_KeyResolverReturnsNull_ThrowsInvalidOperationException()
|
||||
{
|
||||
// Arrange
|
||||
var attestorWithNullKey = new GraphRootAttestor(
|
||||
_merkleComputerMock.Object,
|
||||
_signatureService,
|
||||
_ => null,
|
||||
NullLogger<GraphRootAttestor>.Instance);
|
||||
|
||||
var request = CreateValidRequest();
|
||||
|
||||
// Act & Assert
|
||||
var ex = await Assert.ThrowsAsync<InvalidOperationException>(() => attestorWithNullKey.AttestAsync(request));
|
||||
Assert.Contains("Unable to resolve signing key", ex.Message);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task AttestAsync_CancellationRequested_ThrowsOperationCanceledException()
|
||||
{
|
||||
// Arrange
|
||||
var request = CreateValidRequest();
|
||||
var cts = new CancellationTokenSource();
|
||||
cts.Cancel();
|
||||
|
||||
// Act & Assert
|
||||
await Assert.ThrowsAsync<OperationCanceledException>(() => _attestor.AttestAsync(request, cts.Token));
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task AttestAsync_ReturnsCorrectGraphType()
|
||||
{
|
||||
// Arrange
|
||||
var request = new GraphRootAttestationRequest
|
||||
{
|
||||
GraphType = GraphType.ReachabilityGraph,
|
||||
NodeIds = new[] { "n1" },
|
||||
EdgeIds = Array.Empty<string>(),
|
||||
PolicyDigest = "sha256:p",
|
||||
FeedsDigest = "sha256:f",
|
||||
ToolchainDigest = "sha256:t",
|
||||
ParamsDigest = "sha256:pr",
|
||||
ArtifactDigest = "sha256:a"
|
||||
};
|
||||
|
||||
// Act
|
||||
var result = await _attestor.AttestAsync(request);
|
||||
|
||||
// Assert
|
||||
var attestation = JsonSerializer.Deserialize<GraphRootAttestation>(result.Envelope.Payload.Span);
|
||||
Assert.NotNull(attestation);
|
||||
Assert.Equal("ReachabilityGraph", attestation.Predicate.GraphType);
|
||||
}
|
||||
|
||||
private static GraphRootAttestationRequest CreateValidRequest()
|
||||
{
|
||||
return new GraphRootAttestationRequest
|
||||
{
|
||||
GraphType = GraphType.DependencyGraph,
|
||||
NodeIds = new[] { "node-1", "node-2", "node-3" },
|
||||
EdgeIds = new[] { "edge-1", "edge-2" },
|
||||
PolicyDigest = "sha256:policy123",
|
||||
FeedsDigest = "sha256:feeds456",
|
||||
ToolchainDigest = "sha256:tools789",
|
||||
ParamsDigest = "sha256:params012",
|
||||
ArtifactDigest = "sha256:artifact345"
|
||||
};
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,226 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using StellaOps.Attestor.GraphRoot.Models;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot.Tests;
|
||||
|
||||
public class GraphRootModelsTests
|
||||
{
|
||||
[Fact]
|
||||
public void GraphRootAttestationRequest_RequiredProperties_Set()
|
||||
{
|
||||
// Arrange & Act
|
||||
var request = new GraphRootAttestationRequest
|
||||
{
|
||||
GraphType = GraphType.DependencyGraph,
|
||||
NodeIds = new[] { "node-1", "node-2" },
|
||||
EdgeIds = new[] { "edge-1" },
|
||||
PolicyDigest = "sha256:abc123",
|
||||
FeedsDigest = "sha256:def456",
|
||||
ToolchainDigest = "sha256:ghi789",
|
||||
ParamsDigest = "sha256:jkl012",
|
||||
ArtifactDigest = "sha256:artifact123"
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.Equal(GraphType.DependencyGraph, request.GraphType);
|
||||
Assert.Equal(2, request.NodeIds.Count);
|
||||
Assert.Single(request.EdgeIds);
|
||||
Assert.Equal("sha256:abc123", request.PolicyDigest);
|
||||
Assert.False(request.PublishToRekor);
|
||||
Assert.Null(request.SigningKeyId);
|
||||
Assert.Empty(request.EvidenceIds);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphRootAttestationRequest_OptionalProperties_HaveDefaults()
|
||||
{
|
||||
// Arrange & Act
|
||||
var request = new GraphRootAttestationRequest
|
||||
{
|
||||
GraphType = GraphType.CallGraph,
|
||||
NodeIds = Array.Empty<string>(),
|
||||
EdgeIds = Array.Empty<string>(),
|
||||
PolicyDigest = "sha256:p",
|
||||
FeedsDigest = "sha256:f",
|
||||
ToolchainDigest = "sha256:t",
|
||||
ParamsDigest = "sha256:pr",
|
||||
ArtifactDigest = "sha256:a"
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.False(request.PublishToRekor);
|
||||
Assert.Null(request.SigningKeyId);
|
||||
Assert.Empty(request.EvidenceIds);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphRootPredicate_RequiredProperties_Set()
|
||||
{
|
||||
// Arrange & Act
|
||||
var predicate = new GraphRootPredicate
|
||||
{
|
||||
GraphType = "DependencyGraph",
|
||||
RootHash = "sha256:abc123",
|
||||
NodeCount = 10,
|
||||
EdgeCount = 15,
|
||||
NodeIds = new[] { "n1", "n2" },
|
||||
EdgeIds = new[] { "e1" },
|
||||
Inputs = new GraphInputDigests
|
||||
{
|
||||
PolicyDigest = "sha256:p",
|
||||
FeedsDigest = "sha256:f",
|
||||
ToolchainDigest = "sha256:t",
|
||||
ParamsDigest = "sha256:pr"
|
||||
},
|
||||
CanonVersion = "stella:canon:v1",
|
||||
ComputedAt = DateTimeOffset.UtcNow,
|
||||
ComputedBy = "test",
|
||||
ComputedByVersion = "1.0.0"
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.Equal("DependencyGraph", predicate.GraphType);
|
||||
Assert.Equal("sha256:abc123", predicate.RootHash);
|
||||
Assert.Equal("sha256", predicate.RootAlgorithm);
|
||||
Assert.Equal(10, predicate.NodeCount);
|
||||
Assert.Equal(15, predicate.EdgeCount);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphRootAttestation_HasCorrectDefaults()
|
||||
{
|
||||
// Arrange & Act
|
||||
var attestation = new GraphRootAttestation
|
||||
{
|
||||
Subject = new[]
|
||||
{
|
||||
new GraphRootSubject
|
||||
{
|
||||
Name = "sha256:root",
|
||||
Digest = new Dictionary<string, string> { ["sha256"] = "root" }
|
||||
}
|
||||
},
|
||||
Predicate = new GraphRootPredicate
|
||||
{
|
||||
GraphType = "Test",
|
||||
RootHash = "sha256:root",
|
||||
NodeCount = 1,
|
||||
EdgeCount = 0,
|
||||
NodeIds = Array.Empty<string>(),
|
||||
EdgeIds = Array.Empty<string>(),
|
||||
Inputs = new GraphInputDigests
|
||||
{
|
||||
PolicyDigest = "sha256:p",
|
||||
FeedsDigest = "sha256:f",
|
||||
ToolchainDigest = "sha256:t",
|
||||
ParamsDigest = "sha256:pr"
|
||||
},
|
||||
CanonVersion = "v1",
|
||||
ComputedAt = DateTimeOffset.UtcNow,
|
||||
ComputedBy = "test",
|
||||
ComputedByVersion = "1.0"
|
||||
}
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.Equal("https://in-toto.io/Statement/v1", attestation.Type);
|
||||
Assert.Equal(GraphRootPredicateTypes.GraphRootV1, attestation.PredicateType);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphRootPredicateTypes_HasCorrectValue()
|
||||
{
|
||||
Assert.Equal("https://stella-ops.org/attestation/graph-root/v1", GraphRootPredicateTypes.GraphRootV1);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphRootVerificationResult_ValidResult()
|
||||
{
|
||||
// Arrange & Act
|
||||
var result = new GraphRootVerificationResult
|
||||
{
|
||||
IsValid = true,
|
||||
ExpectedRoot = "sha256:abc",
|
||||
ComputedRoot = "sha256:abc",
|
||||
NodeCount = 5,
|
||||
EdgeCount = 3
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.True(result.IsValid);
|
||||
Assert.Null(result.FailureReason);
|
||||
Assert.Equal("sha256:abc", result.ExpectedRoot);
|
||||
Assert.Equal(5, result.NodeCount);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphRootVerificationResult_InvalidResult_HasReason()
|
||||
{
|
||||
// Arrange & Act
|
||||
var result = new GraphRootVerificationResult
|
||||
{
|
||||
IsValid = false,
|
||||
FailureReason = "Root mismatch",
|
||||
ExpectedRoot = "sha256:abc",
|
||||
ComputedRoot = "sha256:xyz"
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.False(result.IsValid);
|
||||
Assert.Equal("Root mismatch", result.FailureReason);
|
||||
Assert.NotEqual(result.ExpectedRoot, result.ComputedRoot);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphNodeData_RequiredProperty()
|
||||
{
|
||||
// Arrange & Act
|
||||
var node = new GraphNodeData
|
||||
{
|
||||
NodeId = "node-123",
|
||||
Content = "optional content"
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.Equal("node-123", node.NodeId);
|
||||
Assert.Equal("optional content", node.Content);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphEdgeData_AllProperties()
|
||||
{
|
||||
// Arrange & Act
|
||||
var edge = new GraphEdgeData
|
||||
{
|
||||
EdgeId = "edge-1",
|
||||
SourceNodeId = "source-node",
|
||||
TargetNodeId = "target-node"
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.Equal("edge-1", edge.EdgeId);
|
||||
Assert.Equal("source-node", edge.SourceNodeId);
|
||||
Assert.Equal("target-node", edge.TargetNodeId);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void GraphInputDigests_AllDigests()
|
||||
{
|
||||
// Arrange & Act
|
||||
var digests = new GraphInputDigests
|
||||
{
|
||||
PolicyDigest = "sha256:policy",
|
||||
FeedsDigest = "sha256:feeds",
|
||||
ToolchainDigest = "sha256:toolchain",
|
||||
ParamsDigest = "sha256:params"
|
||||
};
|
||||
|
||||
// Assert
|
||||
Assert.Equal("sha256:policy", digests.PolicyDigest);
|
||||
Assert.Equal("sha256:feeds", digests.FeedsDigest);
|
||||
Assert.Equal("sha256:toolchain", digests.ToolchainDigest);
|
||||
Assert.Equal("sha256:params", digests.ParamsDigest);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,177 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using Xunit;
|
||||
|
||||
namespace StellaOps.Attestor.GraphRoot.Tests;
|
||||
|
||||
public class Sha256MerkleRootComputerTests
|
||||
{
|
||||
private readonly Sha256MerkleRootComputer _computer = new();
|
||||
|
||||
[Fact]
|
||||
public void Algorithm_ReturnsSha256()
|
||||
{
|
||||
Assert.Equal("sha256", _computer.Algorithm);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_SingleLeaf_ReturnsHash()
|
||||
{
|
||||
// Arrange
|
||||
var leaf = "test-node-1"u8.ToArray();
|
||||
var leaves = new List<ReadOnlyMemory<byte>> { leaf };
|
||||
|
||||
// Act
|
||||
var root = _computer.ComputeRoot(leaves);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(root);
|
||||
Assert.Equal(32, root.Length); // SHA-256 produces 32 bytes
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_TwoLeaves_CombinesCorrectly()
|
||||
{
|
||||
// Arrange
|
||||
var leaf1 = "node-1"u8.ToArray();
|
||||
var leaf2 = "node-2"u8.ToArray();
|
||||
var leaves = new List<ReadOnlyMemory<byte>> { leaf1, leaf2 };
|
||||
|
||||
// Act
|
||||
var root = _computer.ComputeRoot(leaves);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(root);
|
||||
Assert.Equal(32, root.Length);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_OddLeaves_DuplicatesLast()
|
||||
{
|
||||
// Arrange
|
||||
var leaves = new List<ReadOnlyMemory<byte>>
|
||||
{
|
||||
"node-1"u8.ToArray(),
|
||||
"node-2"u8.ToArray(),
|
||||
"node-3"u8.ToArray()
|
||||
};
|
||||
|
||||
// Act
|
||||
var root = _computer.ComputeRoot(leaves);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(root);
|
||||
Assert.Equal(32, root.Length);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_Deterministic_SameInputSameOutput()
|
||||
{
|
||||
// Arrange
|
||||
var leaves = new List<ReadOnlyMemory<byte>>
|
||||
{
|
||||
"node-a"u8.ToArray(),
|
||||
"node-b"u8.ToArray(),
|
||||
"edge-1"u8.ToArray(),
|
||||
"edge-2"u8.ToArray()
|
||||
};
|
||||
|
||||
// Act
|
||||
var root1 = _computer.ComputeRoot(leaves);
|
||||
var root2 = _computer.ComputeRoot(leaves);
|
||||
|
||||
// Assert
|
||||
Assert.Equal(root1, root2);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_DifferentInputs_DifferentOutputs()
|
||||
{
|
||||
// Arrange
|
||||
var leaves1 = new List<ReadOnlyMemory<byte>> { "node-1"u8.ToArray() };
|
||||
var leaves2 = new List<ReadOnlyMemory<byte>> { "node-2"u8.ToArray() };
|
||||
|
||||
// Act
|
||||
var root1 = _computer.ComputeRoot(leaves1);
|
||||
var root2 = _computer.ComputeRoot(leaves2);
|
||||
|
||||
// Assert
|
||||
Assert.NotEqual(root1, root2);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_OrderMatters()
|
||||
{
|
||||
// Arrange
|
||||
var leavesAB = new List<ReadOnlyMemory<byte>>
|
||||
{
|
||||
"node-a"u8.ToArray(),
|
||||
"node-b"u8.ToArray()
|
||||
};
|
||||
var leavesBA = new List<ReadOnlyMemory<byte>>
|
||||
{
|
||||
"node-b"u8.ToArray(),
|
||||
"node-a"u8.ToArray()
|
||||
};
|
||||
|
||||
// Act
|
||||
var rootAB = _computer.ComputeRoot(leavesAB);
|
||||
var rootBA = _computer.ComputeRoot(leavesBA);
|
||||
|
||||
// Assert - order should matter for Merkle trees
|
||||
Assert.NotEqual(rootAB, rootBA);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_EmptyList_ThrowsArgumentException()
|
||||
{
|
||||
// Arrange
|
||||
var leaves = new List<ReadOnlyMemory<byte>>();
|
||||
|
||||
// Act & Assert
|
||||
Assert.Throws<ArgumentException>(() => _computer.ComputeRoot(leaves));
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_NullInput_ThrowsArgumentNullException()
|
||||
{
|
||||
// Act & Assert
|
||||
Assert.Throws<ArgumentNullException>(() => _computer.ComputeRoot(null!));
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_LargeTree_HandlesCorrectly()
|
||||
{
|
||||
// Arrange - create 100 leaves
|
||||
var leaves = new List<ReadOnlyMemory<byte>>();
|
||||
for (var i = 0; i < 100; i++)
|
||||
{
|
||||
leaves.Add(System.Text.Encoding.UTF8.GetBytes($"node-{i:D4}"));
|
||||
}
|
||||
|
||||
// Act
|
||||
var root = _computer.ComputeRoot(leaves);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(root);
|
||||
Assert.Equal(32, root.Length);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ComputeRoot_PowerOfTwo_HandlesCorrectly()
|
||||
{
|
||||
// Arrange - 8 leaves (power of 2)
|
||||
var leaves = new List<ReadOnlyMemory<byte>>();
|
||||
for (var i = 0; i < 8; i++)
|
||||
{
|
||||
leaves.Add(System.Text.Encoding.UTF8.GetBytes($"node-{i}"));
|
||||
}
|
||||
|
||||
// Act
|
||||
var root = _computer.ComputeRoot(leaves);
|
||||
|
||||
// Assert
|
||||
Assert.NotNull(root);
|
||||
Assert.Equal(32, root.Length);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,30 @@
|
||||
<Project Sdk="Microsoft.NET.Sdk">
|
||||
|
||||
<PropertyGroup>
|
||||
<TargetFramework>net10.0</TargetFramework>
|
||||
<ImplicitUsings>enable</ImplicitUsings>
|
||||
<Nullable>enable</Nullable>
|
||||
<IsPackable>false</IsPackable>
|
||||
<IsTestProject>true</IsTestProject>
|
||||
<RootNamespace>StellaOps.Attestor.GraphRoot.Tests</RootNamespace>
|
||||
</PropertyGroup>
|
||||
|
||||
<ItemGroup>
|
||||
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
|
||||
<PackageReference Include="Moq" Version="4.20.72" />
|
||||
<PackageReference Include="xunit" Version="2.9.3" />
|
||||
<PackageReference Include="xunit.runner.visualstudio" Version="3.1.1">
|
||||
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
|
||||
<PrivateAssets>all</PrivateAssets>
|
||||
</PackageReference>
|
||||
<PackageReference Include="coverlet.collector" Version="6.0.2">
|
||||
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
|
||||
<PrivateAssets>all</PrivateAssets>
|
||||
</PackageReference>
|
||||
</ItemGroup>
|
||||
|
||||
<ItemGroup>
|
||||
<ProjectReference Include="..\..\StellaOps.Attestor.GraphRoot\StellaOps.Attestor.GraphRoot.csproj" />
|
||||
</ItemGroup>
|
||||
|
||||
</Project>
|
||||
Reference in New Issue
Block a user