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StellaOps Bot
2026-01-02 21:06:27 +02:00
parent f46bde5575
commit 3f197814c5
441 changed files with 21545 additions and 4306 deletions
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52
src/Attestor/StellaOps.Attestor.Envelope/DsseEnvelopeSerializer.cs
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@@ -1,8 +1,6 @@
using System;
using System.Buffers;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Security.Cryptography;
using System.Text;
using System.Text.Encodings.Web;
@@ -18,10 +16,25 @@ public static class DsseEnvelopeSerializer
options ??= new DsseEnvelopeSerializationOptions();
if (!options.EmitCompactJson && !options.EmitExpandedJson)
{
throw new InvalidOperationException("At least one JSON format must be emitted.");
}
if (options.CompressionAlgorithm != DsseCompressionAlgorithm.None)
{
throw new NotSupportedException("Payload compression is not supported during serialization. Compress the payload before envelope creation and ensure payloadType/metadata reflect the compressed bytes.");
}
var originalPayload = envelope.Payload.ToArray();
var processedPayload = ApplyCompression(originalPayload, options.CompressionAlgorithm);
var payloadSha256 = Convert.ToHexString(SHA256.HashData(originalPayload)).ToLowerInvariant();
var payloadBase64 = Convert.ToBase64String(processedPayload);
var payloadBase64 = Convert.ToBase64String(originalPayload);
if (envelope.DetachedPayload is not null
&& !string.Equals(payloadSha256, envelope.DetachedPayload.Sha256, StringComparison.OrdinalIgnoreCase))
{
throw new InvalidOperationException("Detached payload digest does not match the envelope payload.");
}
byte[]? compactJson = null;
if (options.EmitCompactJson)
@@ -37,7 +50,7 @@ public static class DsseEnvelopeSerializer
payloadBase64,
payloadSha256,
originalPayload.Length,
processedPayload.Length,
originalPayload.Length,
options,
originalPayload);
}
@@ -47,7 +60,7 @@ public static class DsseEnvelopeSerializer
expandedJson,
payloadSha256,
originalPayload.Length,
processedPayload.Length,
originalPayload.Length, // No compression, so processed == original
options.CompressionAlgorithm,
envelope.DetachedPayload);
}
@@ -227,33 +240,6 @@ public static class DsseEnvelopeSerializer
}
}
private static byte[] ApplyCompression(byte[] payload, DsseCompressionAlgorithm algorithm)
{
return algorithm switch
{
DsseCompressionAlgorithm.None => payload,
DsseCompressionAlgorithm.Gzip => CompressWithStream(payload, static (stream) => new GZipStream(stream, CompressionLevel.SmallestSize, leaveOpen: true)),
DsseCompressionAlgorithm.Brotli => CompressWithStream(payload, static (stream) => new BrotliStream(stream, CompressionLevel.SmallestSize, leaveOpen: true)),
_ => throw new NotSupportedException($"Compression algorithm '{algorithm}' is not supported.")
};
}
private static byte[] CompressWithStream(byte[] payload, Func<Stream, Stream> streamFactory)
{
if (payload.Length == 0)
{
return Array.Empty<byte>();
}
using var output = new MemoryStream();
using (var compressionStream = streamFactory(output))
{
compressionStream.Write(payload);
}
return output.ToArray();
}
private static string GetCompressionName(DsseCompressionAlgorithm algorithm)
{
return algorithm switch