.NET SslStream on WASI experiment

This demonstrates the feasibility of implementing a subset of .NET's System.Net.Security.SslStream based on a proposed wasi:sockets/tls interface

Prequisites

• Rust
• .NET 9 Preview 7 or later

Also, you'll need to download a few pre-release packages and tell NuGet where to find them. Set platform=linux-arm64, platform=linux-x64, platform=win-x64, or platform=osx-arm64 and run:

mkdir packages
curl -LO --output-dir packages https://github.com/dicej/spin-dotnet-sdk/releases/download/canary/Microsoft.DotNet.ILCompiler.LLVM.9.0.0-dev.nupkg
curl -LO --output-dir packages https://github.com/dicej/spin-dotnet-sdk/releases/download/canary/runtime.wasi-wasm.Microsoft.DotNet.ILCompiler.LLVM.9.0.0-dev.nupkg
curl -LO --output-dir packages https://github.com/dicej/spin-dotnet-sdk/releases/download/canary/runtime.$platform.Microsoft.DotNet.ILCompiler.LLVM.9.0.0-dev.nupkg
export NUGET_LOCAL_PATH=$(pwd)/packages

Building and Running

dotnet publish App.csproj
cargo run --release --manifest-path host/Cargo.toml bin/Release/net9.0/wasi-wasm/publish/Wasi.Tls.wasm bytecodealliance.org:443

Debugging

dotnet publish App.csproj -c Debug
cargo build --release --manifest-path host/Cargo.toml
gdb --args ./host/target/release/host --debug bin/Debug/net9.0/wasi-wasm/publish/Wasi.Tls.wasm bytecodealliance.org:443

Once in gdb you can set breakpoints (e.g. break S_P_CoreLib_System_Runtime_EH__RhpThrowEx to break when an exception is thrown), step by instruction, etc.

generate a package

dotnet pack library.csproj 

To use the package:

Copy to local dir cp bin/Release/Wasi.Tls.0.0.1.nupkg $(NUGET_LOCAL_PATH) Then add <add key="Wasi.Tls" value="%NUGET_LOCAL_PATH%" /> to the nuget.config file for the project

Add a package reference to the project:

<PackageReference Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))" Include="Wasi.Tls" Version="0.0.1" />