grpc-go/examples/features/encryption/mTLS/server/main.go

83 lines
2.2 KiB
Go

/*
*
* Copyright 2022 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Binary server is an example server which authenticates clients using mTLS.
package main
import (
"context"
"crypto/tls"
"crypto/x509"
"flag"
"fmt"
"log"
"net"
"os"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/examples/data"
pb "google.golang.org/grpc/examples/features/proto/echo"
)
var port = flag.Int("port", 50051, "the port to serve on")
type ecServer struct {
pb.UnimplementedEchoServer
}
func (s *ecServer) UnaryEcho(ctx context.Context, req *pb.EchoRequest) (*pb.EchoResponse, error) {
return &pb.EchoResponse{Message: req.Message}, nil
}
func main() {
flag.Parse()
log.Printf("server starting on port %d...\n", *port)
cert, err := tls.LoadX509KeyPair(data.Path("x509/server_cert.pem"), data.Path("x509/server_key.pem"))
if err != nil {
log.Fatalf("failed to load key pair: %s", err)
}
ca := x509.NewCertPool()
caFilePath := data.Path("x509/client_ca_cert.pem")
caBytes, err := os.ReadFile(caFilePath)
if err != nil {
log.Fatalf("failed to read ca cert %q: %v", caFilePath, err)
}
if ok := ca.AppendCertsFromPEM(caBytes); !ok {
log.Fatalf("failed to parse %q", caFilePath)
}
tlsConfig := &tls.Config{
ClientAuth: tls.RequireAndVerifyClientCert,
Certificates: []tls.Certificate{cert},
ClientCAs: ca,
}
s := grpc.NewServer(grpc.Creds(credentials.NewTLS(tlsConfig)))
pb.RegisterEchoServer(s, &ecServer{})
lis, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", *port))
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
if err := s.Serve(lis); err != nil {
log.Fatalf("failed to serve: %v", err)
}
}