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| 1 | +// Copyright 2024 CloudWeGo Authors |
| 2 | +// |
| 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 tls |
| 16 | + |
| 17 | +import ( |
| 18 | + "context" |
| 19 | + "crypto/tls" |
| 20 | + "crypto/x509" |
| 21 | + "fmt" |
| 22 | + "io" |
| 23 | + "io/ioutil" |
| 24 | + "net" |
| 25 | + "strings" |
| 26 | + |
| 27 | + "google.golang.org/grpc" |
| 28 | + "google.golang.org/grpc/credentials" |
| 29 | + |
| 30 | + grpc_demo "github.com/cloudwego/kitex-tests/grpc_gen/protobuf/grpc_demo_2" |
| 31 | +) |
| 32 | + |
| 33 | +func RunGRPCTLSServer(hostport string) (*grpc.Server, error) { |
| 34 | + tlsCredentials, err := serverLoadTLSCredentials() |
| 35 | + if err != nil { |
| 36 | + return nil, err |
| 37 | + } |
| 38 | + cred := grpc.Creds(tlsCredentials) |
| 39 | + |
| 40 | + svr := grpc.NewServer(cred) |
| 41 | + ms := &GrpcServiceA{} |
| 42 | + grpc_demo.RegisterServiceAServer(svr, ms) |
| 43 | + listener, err := net.Listen("tcp", hostport) |
| 44 | + if err != nil { |
| 45 | + return nil, err |
| 46 | + } |
| 47 | + go svr.Serve(listener) |
| 48 | + return svr, nil |
| 49 | +} |
| 50 | + |
| 51 | +type GrpcServiceA struct { |
| 52 | + grpc_demo.UnimplementedServiceAServer |
| 53 | +} |
| 54 | + |
| 55 | +func (s *GrpcServiceA) CallUnary(ctx context.Context, req *grpc_demo.Request) (*grpc_demo.Reply, error) { |
| 56 | + res := &grpc_demo.Reply{Message: req.Name + " Hello!"} |
| 57 | + return res, nil |
| 58 | +} |
| 59 | + |
| 60 | +func (s *GrpcServiceA) CallClientStream(stream grpc_demo.ServiceA_CallClientStreamServer) error { |
| 61 | + var msgs []string |
| 62 | + for { |
| 63 | + req, err := stream.Recv() |
| 64 | + if err != nil { |
| 65 | + if err == io.EOF { |
| 66 | + break |
| 67 | + } |
| 68 | + return err |
| 69 | + } |
| 70 | + msgs = append(msgs, req.Name) |
| 71 | + } |
| 72 | + return stream.SendAndClose(&grpc_demo.Reply{Message: "all message: " + strings.Join(msgs, ", ")}) |
| 73 | +} |
| 74 | +func (s *GrpcServiceA) CallServerStream(req *grpc_demo.Request, stream grpc_demo.ServiceA_CallServerStreamServer) error { |
| 75 | + resp := &grpc_demo.Reply{} |
| 76 | + for i := 0; i < 3; i++ { |
| 77 | + resp.Message = fmt.Sprintf("%v-%d", req.Name, i) |
| 78 | + err := stream.Send(resp) |
| 79 | + if err != nil { |
| 80 | + return err |
| 81 | + } |
| 82 | + } |
| 83 | + return nil |
| 84 | +} |
| 85 | +func (s *GrpcServiceA) CallBidiStream(stream grpc_demo.ServiceA_CallBidiStreamServer) error { |
| 86 | + for { |
| 87 | + recv, err := stream.Recv() |
| 88 | + if err != nil { |
| 89 | + if err == io.EOF { |
| 90 | + break |
| 91 | + } |
| 92 | + return err |
| 93 | + } |
| 94 | + resp := &grpc_demo.Reply{} |
| 95 | + resp.Message = recv.Name |
| 96 | + err = stream.Send(resp) |
| 97 | + if err != nil { |
| 98 | + return err |
| 99 | + } |
| 100 | + } |
| 101 | + return nil |
| 102 | +} |
| 103 | + |
| 104 | +func serverLoadTLSCredentials() (credentials.TransportCredentials, error) { |
| 105 | + // Load certificate of the CA who signed client's certificate |
| 106 | + pemClientCA, err := ioutil.ReadFile("cert/ca-cert.pem") |
| 107 | + if err != nil { |
| 108 | + return nil, err |
| 109 | + } |
| 110 | + |
| 111 | + certPool := x509.NewCertPool() |
| 112 | + if !certPool.AppendCertsFromPEM(pemClientCA) { |
| 113 | + return nil, fmt.Errorf("failed to add client CA's certificate") |
| 114 | + } |
| 115 | + |
| 116 | + // Load server's certificate and private key |
| 117 | + serverCert, err := tls.LoadX509KeyPair("cert/server-cert.pem", "cert/server-key.pem") |
| 118 | + if err != nil { |
| 119 | + return nil, err |
| 120 | + } |
| 121 | + |
| 122 | + // Create the credentials and return it |
| 123 | + config := &tls.Config{ |
| 124 | + Certificates: []tls.Certificate{serverCert}, |
| 125 | + ClientAuth: tls.RequireAndVerifyClientCert, // mTLS |
| 126 | + ClientCAs: certPool, |
| 127 | + } |
| 128 | + |
| 129 | + return credentials.NewTLS(config), nil |
| 130 | +} |
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