Building a dotnet projet

mausch · August 8, 2021, 10:43pm

Hi @Elyhaka , I’m also interested in this, did you manage to get it to work?

I just gave this a try (independently) and also failed to make the hashes match (WIP WIP get nuget packages from packages.lock.json for nix · GitHub ) .

Also noticed this other thread of yours Work in progress : dotnet2nix / builtDotNetProject helper

As far as I can tell it’s pretty straightforward how NuGet calculates the hash, see e.g.:

github.com

NuGet/NuGet.Client/blob/f24bad0668193ce21a1db8cabd1ce95ba509c7f0/src/NuGet.Core/NuGet.Packaging/PackageArchiveReader.cs#L431


      
                  ThrowIfZipReadStreamIsNull();
          
          
        ZipReadStream.Seek(offset: 0, origin: SeekOrigin.Begin);
          
          
        contentHash = Convert.ToBase64String(new CryptoHashProvider("SHA512").CalculateHash(ZipReadStream));
              }
          
          
    return contentHash;
          }
          
          
public override Task<byte[]> GetArchiveHashAsync(HashAlgorithmName hashAlgorithmName, CancellationToken token)
          {
              token.ThrowIfCancellationRequested();
          
          
    ThrowIfZipReadStreamIsNull();
          
          
    ZipReadStream.Seek(offset: 0, origin: SeekOrigin.Begin);
          
          
    using (var hashAlgorithm = hashAlgorithmName.GetHashProvider())
              {
                  var hash = hashAlgorithm.ComputeHash(ZipReadStream, leaveStreamOpen: true);

github.com

NuGet/NuGet.Client/blob/f24bad0668193ce21a1db8cabd1ce95ba509c7f0/src/NuGet.Core/NuGet.Packaging/PackageExtractor.cs#L487


      
                  packageExtractionContext.XmlDocFileSaveMode);
              packageReader.CopyFiles(
                  targetPath,
                  packageFiles,
                  packageFileExtractor.ExtractPackageFile,
                  logger,
                  token);
          }
          
          
nupkgStream.Position = 0;
          var packageHash = Convert.ToBase64String(new CryptoHashProvider("SHA512").CalculateHash(nupkgStream));
          
          
File.WriteAllText(tempHashPath, packageHash);
          
          
// get hash for the unsigned content of package
          contentHash = packageReader.GetContentHash(cancellationToken, GetUnsignedPackageHash: () => packageHash);
          
          
// write the new hash file
          var hashFile = new NupkgMetadataFile()
          {
              ContentHash = contentHash,

Still doesn’t work though…