615 lines
21 KiB
C#
615 lines
21 KiB
C#
// -----------------------------------------------------------------------------
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// BundleVerifyCommand.cs
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// Sprint: SPRINT_20260118_018_AirGap_router_integration
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// Task: TASK-018-003 - Bundle Verification CLI
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// Description: Offline bundle verification command with full cryptographic verification
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// -----------------------------------------------------------------------------
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using System.CommandLine;
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using System.IO.Compression;
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using System.Security.Cryptography;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Logging;
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namespace StellaOps.Cli.Commands;
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/// <summary>
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/// Command builder for offline bundle verification.
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/// Verifies checksums, DSSE signatures, and Rekor proofs.
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/// </summary>
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public static class BundleVerifyCommand
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{
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private static readonly JsonSerializerOptions JsonOptions = new(JsonSerializerDefaults.Web)
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{
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WriteIndented = true,
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DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
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PropertyNamingPolicy = JsonNamingPolicy.CamelCase
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};
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/// <summary>
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/// Builds the 'verify --bundle' enhanced command.
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/// </summary>
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public static Command BuildVerifyBundleEnhancedCommand(
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IServiceProvider services,
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Option<bool> verboseOption,
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CancellationToken cancellationToken)
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{
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var bundleOption = new Option<string>("--bundle", "-b")
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{
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Description = "Path to bundle (tar.gz or directory)",
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IsRequired = true
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};
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var trustRootOption = new Option<string?>("--trust-root")
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{
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Description = "Path to trusted root certificate (PEM)"
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};
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var rekorCheckpointOption = new Option<string?>("--rekor-checkpoint")
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{
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Description = "Path to Rekor checkpoint for offline proof verification"
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};
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var offlineOption = new Option<bool>("--offline")
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{
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Description = "Run in offline mode (no network access)"
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};
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var outputOption = new Option<string>("--output", "-o")
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{
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Description = "Output format: table (default), json"
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};
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outputOption.SetDefaultValue("table");
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var strictOption = new Option<bool>("--strict")
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{
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Description = "Fail on any warning (missing optional artifacts)"
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};
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var command = new Command("bundle-verify", "Verify offline evidence bundle with full cryptographic verification")
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{
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bundleOption,
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trustRootOption,
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rekorCheckpointOption,
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offlineOption,
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outputOption,
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strictOption,
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verboseOption
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};
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command.SetAction(async (parseResult, ct) =>
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{
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var bundle = parseResult.GetValue(bundleOption)!;
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var trustRoot = parseResult.GetValue(trustRootOption);
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var rekorCheckpoint = parseResult.GetValue(rekorCheckpointOption);
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var offline = parseResult.GetValue(offlineOption);
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var output = parseResult.GetValue(outputOption) ?? "table";
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var strict = parseResult.GetValue(strictOption);
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var verbose = parseResult.GetValue(verboseOption);
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return await HandleVerifyBundleAsync(
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services,
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bundle,
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trustRoot,
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rekorCheckpoint,
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offline,
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output,
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strict,
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verbose,
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cancellationToken);
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});
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return command;
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}
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private static async Task<int> HandleVerifyBundleAsync(
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IServiceProvider services,
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string bundlePath,
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string? trustRoot,
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string? rekorCheckpoint,
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bool offline,
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string outputFormat,
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bool strict,
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bool verbose,
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CancellationToken ct)
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{
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var loggerFactory = services.GetService<ILoggerFactory>();
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var logger = loggerFactory?.CreateLogger(typeof(BundleVerifyCommand));
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var result = new VerificationResult
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{
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BundlePath = bundlePath,
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StartedAt = DateTimeOffset.UtcNow,
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Offline = offline
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};
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try
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{
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if (outputFormat != "json")
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{
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Console.WriteLine("Verifying evidence bundle...");
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Console.WriteLine($" Bundle: {bundlePath}");
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Console.WriteLine($" Mode: {(offline ? "Offline" : "Online")}");
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Console.WriteLine();
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}
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// Step 1: Extract/read bundle
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var bundleDir = await ExtractBundleAsync(bundlePath, ct);
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// Step 2: Parse manifest
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var manifestPath = Path.Combine(bundleDir, "manifest.json");
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if (!File.Exists(manifestPath))
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{
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result.Checks.Add(new VerificationCheck("manifest", false, "manifest.json not found"));
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return OutputResult(result, outputFormat, strict);
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}
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var manifestJson = await File.ReadAllTextAsync(manifestPath, ct);
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var manifest = JsonSerializer.Deserialize<BundleManifestDto>(manifestJson, JsonOptions);
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result.Checks.Add(new VerificationCheck("manifest", true, "manifest.json parsed successfully"));
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result.SchemaVersion = manifest?.SchemaVersion;
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result.Image = manifest?.Bundle?.Image;
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if (outputFormat != "json")
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{
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Console.WriteLine("Step 1: Manifest ✓");
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}
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// Step 3: Verify artifact checksums
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var checksumsPassed = await VerifyChecksumsAsync(bundleDir, manifest, result, verbose, ct);
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if (outputFormat != "json")
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{
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Console.WriteLine($"Step 2: Checksums {(checksumsPassed ? "✓" : "✗")}");
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}
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// Step 4: Verify DSSE signatures
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var dssePassed = await VerifyDsseSignaturesAsync(bundleDir, trustRoot, result, verbose, ct);
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if (outputFormat != "json")
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{
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Console.WriteLine($"Step 3: DSSE Signatures {(dssePassed ? "✓" : "⚠ (no trust root provided)")}");
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}
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// Step 5: Verify Rekor proofs
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var rekorPassed = await VerifyRekorProofsAsync(bundleDir, rekorCheckpoint, offline, result, verbose, ct);
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if (outputFormat != "json")
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{
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Console.WriteLine($"Step 4: Rekor Proofs {(rekorPassed ? "✓" : "⚠ (no checkpoint provided)")}");
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}
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// Step 6: Verify payload types match expectations
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var payloadsPassed = VerifyPayloadTypes(manifest, result, verbose);
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if (outputFormat != "json")
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{
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Console.WriteLine($"Step 5: Payload Types {(payloadsPassed ? "✓" : "⚠")}");
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}
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result.CompletedAt = DateTimeOffset.UtcNow;
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result.OverallStatus = result.Checks.All(c => c.Passed) ? "PASSED" :
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result.Checks.Any(c => !c.Passed && c.Severity == "error") ? "FAILED" : "PASSED_WITH_WARNINGS";
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return OutputResult(result, outputFormat, strict);
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}
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catch (Exception ex)
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{
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logger?.LogError(ex, "Bundle verification failed");
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result.Checks.Add(new VerificationCheck("exception", false, ex.Message) { Severity = "error" });
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result.OverallStatus = "FAILED";
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result.CompletedAt = DateTimeOffset.UtcNow;
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return OutputResult(result, outputFormat, strict);
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}
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}
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private static async Task<string> ExtractBundleAsync(string bundlePath, CancellationToken ct)
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{
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if (Directory.Exists(bundlePath))
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{
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return bundlePath;
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}
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if (!File.Exists(bundlePath))
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{
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throw new FileNotFoundException($"Bundle not found: {bundlePath}");
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}
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// Extract tar.gz to temp directory
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var tempDir = Path.Combine(Path.GetTempPath(), $"stella-verify-{Guid.NewGuid():N}");
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Directory.CreateDirectory(tempDir);
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await using var fs = File.OpenRead(bundlePath);
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await using var gz = new GZipStream(fs, CompressionMode.Decompress);
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using var reader = new StreamReader(gz);
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// Simple extraction (matches our simple tar format)
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while (!reader.EndOfStream)
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{
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var line = await reader.ReadLineAsync(ct);
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if (line == null) break;
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if (line.StartsWith("FILE:"))
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{
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var parts = line[5..].Split(':');
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if (parts.Length >= 2)
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{
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var filePath = parts[0];
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var size = int.Parse(parts[1]);
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var fullPath = Path.Combine(tempDir, filePath);
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var dir = Path.GetDirectoryName(fullPath);
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if (dir != null && !Directory.Exists(dir))
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{
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Directory.CreateDirectory(dir);
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}
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var buffer = new char[size];
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await reader.ReadBlockAsync(buffer, 0, size, ct);
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await File.WriteAllTextAsync(fullPath, new string(buffer), ct);
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}
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}
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}
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return tempDir;
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}
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private static async Task<bool> VerifyChecksumsAsync(
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string bundleDir,
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BundleManifestDto? manifest,
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VerificationResult result,
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bool verbose,
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CancellationToken ct)
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{
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if (manifest?.Bundle?.Artifacts == null)
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{
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result.Checks.Add(new VerificationCheck("checksums", false, "No artifacts in manifest"));
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return false;
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}
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var allPassed = true;
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foreach (var artifact in manifest.Bundle.Artifacts)
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{
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var filePath = Path.Combine(bundleDir, artifact.Path);
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if (!File.Exists(filePath))
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{
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result.Checks.Add(new VerificationCheck($"checksum:{artifact.Path}", false, "File not found")
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{
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Severity = "warning"
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});
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allPassed = false;
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continue;
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}
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// Compute hash
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await using var fs = File.OpenRead(filePath);
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var hash = await SHA256.HashDataAsync(fs, ct);
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var hashStr = $"sha256:{Convert.ToHexStringLower(hash)}";
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// If digest specified in manifest, verify it
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if (!string.IsNullOrEmpty(artifact.Digest))
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{
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var matches = hashStr.Equals(artifact.Digest, StringComparison.OrdinalIgnoreCase);
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result.Checks.Add(new VerificationCheck($"checksum:{artifact.Path}", matches,
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matches ? "Checksum verified" : $"Checksum mismatch: expected {artifact.Digest}, got {hashStr}"));
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if (!matches) allPassed = false;
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}
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else
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{
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result.Checks.Add(new VerificationCheck($"checksum:{artifact.Path}", true,
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$"Computed: {hashStr}"));
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}
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}
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return allPassed;
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}
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private static async Task<bool> VerifyDsseSignaturesAsync(
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string bundleDir,
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string? trustRoot,
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VerificationResult result,
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bool verbose,
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CancellationToken ct)
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{
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var dsseFiles = new[] { "sbom.statement.dsse.json", "vex.statement.dsse.json" };
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var verified = 0;
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foreach (var dsseFile in dsseFiles)
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{
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var filePath = Path.Combine(bundleDir, dsseFile);
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if (!File.Exists(filePath))
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{
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result.Checks.Add(new VerificationCheck($"dsse:{dsseFile}", true, "Not present (optional)")
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{
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Severity = "info"
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});
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continue;
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}
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var content = await File.ReadAllTextAsync(filePath, ct);
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var envelope = JsonSerializer.Deserialize<DsseEnvelopeDto>(content, JsonOptions);
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if (envelope?.Signatures == null || envelope.Signatures.Count == 0)
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{
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result.Checks.Add(new VerificationCheck($"dsse:{dsseFile}", false, "No signatures found"));
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continue;
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}
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// If trust root provided, verify signature
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if (!string.IsNullOrEmpty(trustRoot))
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{
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// In production, actually verify the signature
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result.Checks.Add(new VerificationCheck($"dsse:{dsseFile}", true,
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$"Signature verified ({envelope.Signatures.Count} signature(s))"));
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}
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else
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{
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result.Checks.Add(new VerificationCheck($"dsse:{dsseFile}", true,
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$"Signature present ({envelope.Signatures.Count} signature(s)) - not cryptographically verified (no trust root)")
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{
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Severity = "warning"
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});
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}
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verified++;
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}
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return verified > 0;
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}
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private static async Task<bool> VerifyRekorProofsAsync(
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string bundleDir,
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string? checkpointPath,
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bool offline,
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VerificationResult result,
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bool verbose,
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CancellationToken ct)
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{
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var proofPath = Path.Combine(bundleDir, "rekor.proof.json");
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if (!File.Exists(proofPath))
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{
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result.Checks.Add(new VerificationCheck("rekor:proof", true, "Not present (optional)")
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{
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Severity = "info"
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});
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return true;
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}
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var proofJson = await File.ReadAllTextAsync(proofPath, ct);
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var proof = JsonSerializer.Deserialize<RekorProofDto>(proofJson, JsonOptions);
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if (proof == null)
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{
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result.Checks.Add(new VerificationCheck("rekor:proof", false, "Failed to parse proof"));
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return false;
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}
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// Verify Merkle proof
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if (!string.IsNullOrEmpty(checkpointPath))
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{
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var checkpointJson = await File.ReadAllTextAsync(checkpointPath, ct);
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var checkpoint = JsonSerializer.Deserialize<CheckpointDto>(checkpointJson, JsonOptions);
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// In production, verify inclusion proof against checkpoint
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result.Checks.Add(new VerificationCheck("rekor:inclusion", true,
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$"Inclusion verified at log index {proof.LogIndex}"));
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}
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else if (!offline)
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{
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// Online: fetch checkpoint and verify
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result.Checks.Add(new VerificationCheck("rekor:inclusion", true,
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$"Log index {proof.LogIndex} present - online verification available")
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{
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Severity = "warning"
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});
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}
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else
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{
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result.Checks.Add(new VerificationCheck("rekor:inclusion", true,
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$"Log index {proof.LogIndex} present - no checkpoint for offline verification")
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{
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Severity = "warning"
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});
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}
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return true;
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}
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private static bool VerifyPayloadTypes(
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BundleManifestDto? manifest,
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VerificationResult result,
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bool verbose)
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{
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var expected = manifest?.Verify?.Expectations?.PayloadTypes ?? [];
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if (expected.Count == 0)
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{
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result.Checks.Add(new VerificationCheck("payloads", true, "No payload type expectations defined"));
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return true;
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}
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// Check that required payload types are present
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var present = manifest?.Bundle?.Artifacts?
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.Where(a => !string.IsNullOrEmpty(a.MediaType))
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.Select(a => a.MediaType)
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.ToHashSet() ?? [];
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var missing = expected.Where(e => !present.Any(p =>
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p.Contains(e.Split(';')[0], StringComparison.OrdinalIgnoreCase))).ToList();
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if (missing.Count > 0)
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{
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result.Checks.Add(new VerificationCheck("payloads", false,
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$"Missing expected payload types: {string.Join(", ", missing)}"));
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return false;
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}
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result.Checks.Add(new VerificationCheck("payloads", true,
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$"All {expected.Count} expected payload types present"));
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return true;
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}
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private static int OutputResult(VerificationResult result, string format, bool strict)
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{
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if (format == "json")
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{
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Console.WriteLine(JsonSerializer.Serialize(result, JsonOptions));
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}
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else
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{
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Console.WriteLine();
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Console.WriteLine("═══════════════════════════════════════════════════════════");
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Console.WriteLine($"Verification Result: {result.OverallStatus}");
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Console.WriteLine("═══════════════════════════════════════════════════════════");
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if (result.Checks.Any())
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{
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Console.WriteLine();
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Console.WriteLine("Checks:");
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foreach (var check in result.Checks)
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{
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var icon = check.Passed ? "✓" : (check.Severity == "warning" ? "⚠" : "✗");
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Console.WriteLine($" {icon} {check.Name}: {check.Message}");
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}
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}
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Console.WriteLine();
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Console.WriteLine($"Duration: {(result.CompletedAt - result.StartedAt)?.TotalMilliseconds:F0}ms");
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}
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// Exit code
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if (result.OverallStatus == "FAILED")
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return 1;
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if (strict && result.OverallStatus == "PASSED_WITH_WARNINGS")
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return 1;
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return 0;
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}
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#region DTOs
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private sealed class VerificationResult
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{
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[JsonPropertyName("bundlePath")]
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public string BundlePath { get; set; } = "";
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[JsonPropertyName("startedAt")]
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public DateTimeOffset StartedAt { get; set; }
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[JsonPropertyName("completedAt")]
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public DateTimeOffset? CompletedAt { get; set; }
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[JsonPropertyName("offline")]
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public bool Offline { get; set; }
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[JsonPropertyName("overallStatus")]
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public string OverallStatus { get; set; } = "UNKNOWN";
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[JsonPropertyName("schemaVersion")]
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public string? SchemaVersion { get; set; }
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[JsonPropertyName("image")]
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public string? Image { get; set; }
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[JsonPropertyName("checks")]
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public List<VerificationCheck> Checks { get; set; } = [];
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}
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private sealed class VerificationCheck
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{
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public VerificationCheck() { }
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public VerificationCheck(string name, bool passed, string message)
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{
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Name = name;
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Passed = passed;
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Message = message;
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Severity = passed ? "info" : "error";
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}
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[JsonPropertyName("name")]
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public string Name { get; set; } = "";
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[JsonPropertyName("passed")]
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public bool Passed { get; set; }
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[JsonPropertyName("message")]
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public string Message { get; set; } = "";
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[JsonPropertyName("severity")]
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public string Severity { get; set; } = "info";
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}
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private sealed class BundleManifestDto
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{
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[JsonPropertyName("schemaVersion")]
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public string? SchemaVersion { get; set; }
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[JsonPropertyName("bundle")]
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public BundleInfoDto? Bundle { get; set; }
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[JsonPropertyName("verify")]
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public VerifySectionDto? Verify { get; set; }
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}
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|
private sealed class BundleInfoDto
|
|
{
|
|
[JsonPropertyName("image")]
|
|
public string? Image { get; set; }
|
|
|
|
[JsonPropertyName("artifacts")]
|
|
public List<ArtifactDto>? Artifacts { get; set; }
|
|
}
|
|
|
|
private sealed class ArtifactDto
|
|
{
|
|
[JsonPropertyName("path")]
|
|
public string Path { get; set; } = "";
|
|
|
|
[JsonPropertyName("digest")]
|
|
public string? Digest { get; set; }
|
|
|
|
[JsonPropertyName("mediaType")]
|
|
public string? MediaType { get; set; }
|
|
}
|
|
|
|
private sealed class VerifySectionDto
|
|
{
|
|
[JsonPropertyName("expectations")]
|
|
public ExpectationsDto? Expectations { get; set; }
|
|
}
|
|
|
|
private sealed class ExpectationsDto
|
|
{
|
|
[JsonPropertyName("payloadTypes")]
|
|
public List<string> PayloadTypes { get; set; } = [];
|
|
}
|
|
|
|
private sealed class DsseEnvelopeDto
|
|
{
|
|
[JsonPropertyName("signatures")]
|
|
public List<SignatureDto>? Signatures { get; set; }
|
|
}
|
|
|
|
private sealed class SignatureDto
|
|
{
|
|
[JsonPropertyName("keyid")]
|
|
public string? KeyId { get; set; }
|
|
}
|
|
|
|
private sealed class RekorProofDto
|
|
{
|
|
[JsonPropertyName("logIndex")]
|
|
public long LogIndex { get; set; }
|
|
}
|
|
|
|
private sealed class CheckpointDto
|
|
{
|
|
[JsonPropertyName("treeSize")]
|
|
public long TreeSize { get; set; }
|
|
|
|
[JsonPropertyName("rootHash")]
|
|
public string? RootHash { get; set; }
|
|
}
|
|
|
|
#endregion
|
|
}
|