Envoy Types

Collection of protobuf types to work with the [Envoy Proxy] through Rust services.

Among other use cases, this crate can be used to implement an [Envoy External Authorization] (ExtAuthz) gRPC Server written in Rust.

[Examples] | [Docs]

Getting Started

toml [dependencies] envoy-types = "<envoy-types-version>"

The protobuf types made available are already pre-compiled, so you only need to have the Protocol Buffer Compiler (protoc) installed to run the crate's tests. Installation instructions can be found here.

Examples

The example bellow covers a bare-bones implementation of an Envoy ExtAuthz gRPC AuthorizationServer, with [tonic]. A more complete implementation, including query parameters and header manipulation, can be found at the [examples] directory.

```rust use std::collections::HashMap; use tonic::{transport::Server, Request, Response, Status};

use envoytypes::extauthz::v3::pb::{ Address, Authorization, AuthorizationServer, CheckRequest, CheckResponse, }; use envoy_types::pb::google::rpc;

[derive(Default)]

struct MyServer;

fn getexternalrequestdata( request: Request, ) -> Option<(String, HashMap)> { let attributes = request.intoinner().attributes?; let clientaddress = match attributes.source?.address?.address? { Address::SocketAddress(socketaddress) => socketaddress.address, _ => return None, }; let clientheaders = attributes.request?.http?.headers; Some((clientaddress, clientheaders)) }

[tonic::async_trait]

impl Authorization for MyServer { async fn check( &self, request: Request, ) -> Result, Status> { // Request is unauthenticated by default let mut responsestatus = rpc::Status::default(); responsestatus.code = rpc::Code::Unauthenticated.into();

    if let Some((client_address, client_headers)) = get_external_request_data(request) {
        // Validate `client_address` and/or `client_headers`
        // ...

        if let Some(authorization) = client_headers.get("authorization") {
            if authorization == "Bearer valid-token" {
                // Mark request as authenticated
                response_status.code = rpc::Code::Ok.into();
            }
        }
    }

    let mut response = CheckResponse::default();
    response.status = Some(response_status);

    Ok(Response::new(response))
}

}

[tokio::main]

async fn main() -> Result<(), Box> { let addr = format!("0.0.0.0:50051").parse().unwrap(); let server = MyServer::default();

println!("AuthorizationServer listening on 50051");

Server::builder()
    .add_service(AuthorizationServer::new(server))
    .serve(addr)
    .await?;

Ok(())

} ```

License

This project is licensed under the Apache License (Version 2.0).

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion by you, shall be licensed as Apache-2.0, without any additional terms or conditions.