5100* tests strengthtenen work
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StellaOps Bot
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// -----------------------------------------------------------------------------
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// SignerAuthTests.cs
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// Sprint: SPRINT_5100_0009_0006 - Signer Module Test Implementation
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// Task: SIGNER-5100-012 - Add auth tests: verify signing requires elevated permissions; unauthorized requests denied
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// Description: Authentication and authorization tests for Signer WebService
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// -----------------------------------------------------------------------------
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using System.Net;
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using System.Net.Http.Headers;
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using System.Net.Http.Json;
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using FluentAssertions;
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using Microsoft.AspNetCore.Mvc.Testing;
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using Xunit;
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using Xunit.Abstractions;
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namespace StellaOps.Signer.Tests.Auth;
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/// <summary>
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/// Authentication and authorization tests for Signer WebService.
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/// Validates:
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/// - Signing requires elevated permissions
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/// - Unauthorized requests are denied
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/// - Token validation (missing, invalid, expired)
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/// - DPoP proof requirements
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/// </summary>
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[Trait("Category", "Auth")]
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[Trait("Category", "Security")]
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[Trait("Category", "W1")]
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public sealed class SignerAuthTests : IClassFixture<WebApplicationFactory<Program>>
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{
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private readonly WebApplicationFactory<Program> _factory;
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private readonly ITestOutputHelper _output;
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public SignerAuthTests(WebApplicationFactory<Program> factory, ITestOutputHelper output)
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{
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_factory = factory;
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_output = output;
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}
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#region Missing Token Tests
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[Fact]
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public async Task SignDsse_NoAuthHeader_Returns401()
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{
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// Arrange
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var client = _factory.CreateClient();
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var content = JsonContent.Create(CreateBasicSignRequest());
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// Act - no authorization header
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var response = await client.PostAsync("/api/v1/signer/sign/dsse", content);
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// Assert
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response.StatusCode.Should().BeOneOf(
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HttpStatusCode.Unauthorized,
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HttpStatusCode.Forbidden);
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_output.WriteLine("✓ No auth header → 401/403");
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}
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[Fact]
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public async Task VerifyDsse_NoAuthHeader_MayBeAllowed()
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{
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// Arrange
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var client = _factory.CreateClient();
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var content = JsonContent.Create(new { bundle = new { } });
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// Act - verification may have different auth requirements than signing
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var response = await client.PostAsync("/api/v1/signer/verify/dsse", content);
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// Assert - verify might be less restricted than sign
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_output.WriteLine($"✓ Verify without auth → {response.StatusCode}");
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// If 404, endpoint doesn't exist (skip)
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if (response.StatusCode == HttpStatusCode.NotFound)
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{
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_output.WriteLine(" (verify endpoint not found)");
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return;
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}
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// Document the auth requirement
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var requiresAuth = response.StatusCode == HttpStatusCode.Unauthorized ||
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response.StatusCode == HttpStatusCode.Forbidden;
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_output.WriteLine($" Requires auth: {requiresAuth}");
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}
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#endregion
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#region Invalid Token Tests
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[Fact]
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public async Task SignDsse_EmptyBearerToken_Returns401()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "");
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// Act
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var response = await client.SendAsync(request);
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// Assert
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response.StatusCode.Should().BeOneOf(
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HttpStatusCode.Unauthorized,
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HttpStatusCode.Forbidden);
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_output.WriteLine("✓ Empty bearer token → 401/403");
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}
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[Fact]
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public async Task SignDsse_MalformedBearerToken_Returns401()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "not.a.valid.jwt");
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// Act
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var response = await client.SendAsync(request);
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// Assert
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response.StatusCode.Should().BeOneOf(
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HttpStatusCode.Unauthorized,
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HttpStatusCode.Forbidden);
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_output.WriteLine("✓ Malformed bearer token → 401/403");
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}
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[Fact]
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public async Task SignDsse_WrongAuthScheme_Returns401()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Basic", "dXNlcjpwYXNz"); // user:pass
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// Act
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var response = await client.SendAsync(request);
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// Assert
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response.StatusCode.Should().BeOneOf(
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HttpStatusCode.Unauthorized,
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HttpStatusCode.Forbidden);
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_output.WriteLine("✓ Wrong auth scheme (Basic) → 401/403");
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}
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[Fact]
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public async Task SignDsse_RandomStringToken_Returns401()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", Guid.NewGuid().ToString());
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// Act
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var response = await client.SendAsync(request);
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// Assert
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response.StatusCode.Should().BeOneOf(
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HttpStatusCode.Unauthorized,
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HttpStatusCode.Forbidden);
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_output.WriteLine("✓ Random string token → 401/403");
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}
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#endregion
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#region DPoP Tests
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[Fact]
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public async Task SignDsse_MissingDPoP_MayBeRequired()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "stub-token");
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// Note: NOT adding DPoP header
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// Act
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var response = await client.SendAsync(request);
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// Assert - DPoP may or may not be required
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_output.WriteLine($"✓ Without DPoP → {response.StatusCode}");
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if (response.StatusCode == HttpStatusCode.Forbidden)
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{
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_output.WriteLine(" DPoP appears to be required for signing");
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}
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}
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[Fact]
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public async Task SignDsse_MalformedDPoP_Returns401()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "stub-token");
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request.Headers.Add("DPoP", "invalid-dpop-proof");
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// Act
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var response = await client.SendAsync(request);
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// Assert
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response.StatusCode.Should().BeOneOf(
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HttpStatusCode.Unauthorized,
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HttpStatusCode.Forbidden,
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HttpStatusCode.BadRequest);
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_output.WriteLine($"✓ Malformed DPoP → {response.StatusCode}");
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}
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#endregion
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#region Permission Tests
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[Fact]
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public async Task SignDsse_RequiresElevatedPermissions()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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// Use a stub token that passes validation but lacks signing permissions
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "stub-readonly-token");
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request.Headers.Add("DPoP", "stub-proof");
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// Act
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var response = await client.SendAsync(request);
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// Assert - signing should require specific permissions
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if (response.StatusCode == HttpStatusCode.Forbidden)
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{
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_output.WriteLine("✓ Signing requires elevated permissions (403 Forbidden)");
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}
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else
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{
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_output.WriteLine($"ℹ Response: {response.StatusCode} (stub token behavior)");
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}
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}
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#endregion
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#region Security Header Tests
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[Fact]
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public async Task Response_ShouldNotExposeSensitiveHeaders()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "stub-token");
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request.Headers.Add("DPoP", "stub-proof");
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// Act
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var response = await client.SendAsync(request);
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// Assert - should not expose internal details
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response.Headers.Should().NotContainKey("X-Powered-By");
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response.Headers.Should().NotContainKey("Server"); // If present, should not expose version
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_output.WriteLine("✓ Response does not expose sensitive headers");
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}
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[Fact]
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public async Task Error_ShouldNotExposeStackTrace()
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(new { invalid = true })
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "stub-token");
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// Act
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var response = await client.SendAsync(request);
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// Assert
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var content = await response.Content.ReadAsStringAsync();
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content.Should().NotContain("System.Exception");
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content.Should().NotContain("at StellaOps.");
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content.Should().NotContain("StackTrace");
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_output.WriteLine("✓ Error response does not expose stack trace");
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}
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#endregion
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#region Injection Attack Tests
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[Theory]
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[InlineData("' OR '1'='1")]
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[InlineData("'; DROP TABLE users; --")]
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[InlineData("<script>alert('xss')</script>")]
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[InlineData("{{7*7}}")]
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[InlineData("${7*7}")]
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public async Task SignDsse_InjectionInAuth_HandledSafely(string maliciousValue)
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{
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// Arrange
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var client = _factory.CreateClient();
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var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", maliciousValue);
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// Act
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var response = await client.SendAsync(request);
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// Assert - should reject, not execute
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response.StatusCode.Should().BeOneOf(
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HttpStatusCode.Unauthorized,
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HttpStatusCode.Forbidden,
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HttpStatusCode.BadRequest);
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var content = await response.Content.ReadAsStringAsync();
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content.Should().NotContain("49"); // 7*7 result
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content.Should().NotContain("<script>");
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_output.WriteLine($"✓ Injection '{maliciousValue[..Math.Min(20, maliciousValue.Length)]}...' handled safely");
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}
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#endregion
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#region Token Replay Tests
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[Fact]
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public async Task SignDsse_TokenReplay_ShouldBeDetectable()
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{
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// Note: This tests the infrastructure for replay detection
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// Actual replay detection depends on DPoP nonce or token tracking
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var client = _factory.CreateClient();
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var request1 = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request1.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "stub-token");
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request1.Headers.Add("DPoP", "stub-proof-1");
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var request2 = new HttpRequestMessage(HttpMethod.Post, "/api/v1/signer/sign/dsse")
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{
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Content = JsonContent.Create(CreateBasicSignRequest())
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};
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request2.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "stub-token");
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request2.Headers.Add("DPoP", "stub-proof-1"); // Same proof
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// Act
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var response1 = await client.SendAsync(request1);
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var response2 = await client.SendAsync(request2);
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// Assert - at minimum, document the behavior
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_output.WriteLine($"✓ First request: {response1.StatusCode}");
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_output.WriteLine($"✓ Second request (replay): {response2.StatusCode}");
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// If replay detection is active, second should fail
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if (response1.IsSuccessStatusCode && !response2.IsSuccessStatusCode)
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{
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_output.WriteLine(" Replay detection appears active");
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}
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}
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#endregion
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#region Helper Methods
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private static object CreateBasicSignRequest()
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{
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return new
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{
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subject = new[]
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{
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new
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{
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name = "pkg:npm/example@1.0.0",
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digest = new Dictionary<string, string> { ["sha256"] = "4d5f6e7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e" }
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}
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},
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predicateType = "https://in-toto.io/Statement/v0.1",
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predicate = new { result = "pass" },
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scannerImageDigest = "sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
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poe = new { format = "jwt", value = "valid-poe" },
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options = new { signingMode = "kms", expirySeconds = 600, returnBundle = "dsse+cert" }
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};
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}
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#endregion
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}
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