vitess.io/vitess@v0.16.2/go/vt/grpcoptionaltls/server_test.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  Licensed under the Apache License, Version 2.0 (the "License");
     4  you may not use this file except in compliance with the License.
     5  You may obtain a copy of the License at
     6  
     7  	http://www.apache.org/licenses/LICENSE-2.0
     8  
     9  Unless required by applicable law or agreed to in writing, software
    10  distributed under the License is distributed on an "AS IS" BASIS,
    11  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  See the License for the specific language governing permissions and
    13  limitations under the License.
    14  */
    15  package grpcoptionaltls
    16  
    17  import (
    18  	"context"
    19  	"crypto/tls"
    20  	"net"
    21  	"testing"
    22  	"time"
    23  
    24  	"google.golang.org/grpc/credentials/insecure"
    25  
    26  	"google.golang.org/grpc"
    27  	"google.golang.org/grpc/credentials"
    28  	pb "google.golang.org/grpc/examples/helloworld/helloworld"
    29  
    30  	"vitess.io/vitess/go/vt/tlstest"
    31  )
    32  
    33  // server is used to implement helloworld.GreeterServer.
    34  type server struct {
    35  	pb.UnimplementedGreeterServer
    36  }
    37  
    38  // SayHello implements helloworld.GreeterServer
    39  func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
    40  	return &pb.HelloReply{Message: "Hello " + in.GetName()}, nil
    41  }
    42  
    43  func createUnstartedServer(creds credentials.TransportCredentials) *grpc.Server {
    44  	s := grpc.NewServer(grpc.Creds(creds))
    45  	pb.RegisterGreeterServer(s, &server{})
    46  	return s
    47  }
    48  
    49  type testCredentials struct {
    50  	client credentials.TransportCredentials
    51  	server credentials.TransportCredentials
    52  }
    53  
    54  func createCredentials(t *testing.T) (*testCredentials, error) {
    55  	// Create a temporary directory.
    56  	certDir := t.TempDir()
    57  
    58  	certs := tlstest.CreateClientServerCertPairs(certDir)
    59  	cert, err := tls.LoadX509KeyPair(certs.ServerCert, certs.ServerKey)
    60  	if err != nil {
    61  		return nil, err
    62  	}
    63  
    64  	clientCredentials, err := credentials.NewClientTLSFromFile(certs.ServerCA, certs.ServerName)
    65  	if err != nil {
    66  		return nil, err
    67  	}
    68  	tc := &testCredentials{
    69  		client: clientCredentials,
    70  		server: credentials.NewServerTLSFromCert(&cert),
    71  	}
    72  	return tc, nil
    73  }
    74  
    75  func TestOptionalTLS(t *testing.T) {
    76  	testCtx, testCancel := context.WithCancel(context.Background())
    77  	defer testCancel()
    78  
    79  	tc, err := createCredentials(t)
    80  	if err != nil {
    81  		t.Fatalf("failed to create credentials %v", err)
    82  	}
    83  
    84  	lis, err := net.Listen("tcp", "127.0.0.1:0")
    85  	if err != nil {
    86  		t.Fatalf("failed to listen %v", err)
    87  	}
    88  	defer lis.Close()
    89  	addr := lis.Addr().String()
    90  
    91  	srv := createUnstartedServer(New(tc.server))
    92  	go func() {
    93  		srv.Serve(lis)
    94  	}()
    95  	defer srv.Stop()
    96  
    97  	testFunc := func(t *testing.T, dialOpt grpc.DialOption) {
    98  		ctx, cancel := context.WithTimeout(testCtx, 5*time.Second)
    99  		defer cancel()
   100  		conn, err := grpc.DialContext(ctx, addr, dialOpt)
   101  		if err != nil {
   102  			t.Fatalf("failed to connect to the server %v", err)
   103  		}
   104  		defer conn.Close()
   105  		c := pb.NewGreeterClient(conn)
   106  		resp, err := c.SayHello(ctx, &pb.HelloRequest{Name: "Vittes"})
   107  		if err != nil {
   108  			t.Fatalf("could not greet: %v", err)
   109  		}
   110  		if resp.Message != "Hello Vittes" {
   111  			t.Fatalf("unexpected reply %s", resp.Message)
   112  		}
   113  	}
   114  
   115  	t.Run("Plain2TLS", func(t *testing.T) {
   116  		for i := 0; i < 5; i++ {
   117  			testFunc(t, grpc.WithTransportCredentials(insecure.NewCredentials()))
   118  		}
   119  	})
   120  	t.Run("TLS2TLS", func(t *testing.T) {
   121  		for i := 0; i < 5; i++ {
   122  			testFunc(t, grpc.WithTransportCredentials(tc.client))
   123  		}
   124  	})
   125  }