/
main.go
112 lines (101 loc) · 3.59 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
/*
*
* Copyright 2020 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.
*
*/
// The server demonstrates how to use the credential reloading feature in
// advancedtls to serve mTLS connections from the client.
package main
import (
"context"
"flag"
"fmt"
"log"
"net"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/tls/certprovider/pemfile"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/security/advancedtls"
"google.golang.org/grpc/security/advancedtls/testdata"
pb "google.golang.org/grpc/examples/helloworld/helloworld"
)
var port = ":50051"
// Intervals that set to monitor the credential updates.
const credRefreshingInterval = 1 * time.Minute
type greeterServer struct {
pb.UnimplementedGreeterServer
}
// sayHello is a simple implementation of the pb.GreeterServer SayHello method.
func (greeterServer) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
return &pb.HelloReply{Message: "Hello " + in.Name}, nil
}
func main() {
flag.Parse()
fmt.Printf("server starting on port %s...\n", port)
identityOptions := pemfile.Options{
CertFile: testdata.Path("server_cert_1.pem"),
KeyFile: testdata.Path("server_key_1.pem"),
RefreshDuration: credRefreshingInterval,
}
identityProvider, err := pemfile.NewProvider(identityOptions)
if err != nil {
log.Fatalf("pemfile.NewProvider(%v) failed: %v", identityOptions, err)
}
defer identityProvider.Close()
rootOptions := pemfile.Options{
RootFile: testdata.Path("server_trust_cert_1.pem"),
RefreshDuration: credRefreshingInterval,
}
rootProvider, err := pemfile.NewProvider(rootOptions)
if err != nil {
log.Fatalf("pemfile.NewProvider(%v) failed: %v", rootOptions, err)
}
defer rootProvider.Close()
// Start a server and create a client using advancedtls API with Provider.
options := &advancedtls.ServerOptions{
IdentityOptions: advancedtls.IdentityCertificateOptions{
IdentityProvider: identityProvider,
},
RootOptions: advancedtls.RootCertificateOptions{
RootProvider: rootProvider,
},
RequireClientCert: true,
VerifyPeer: func(params *advancedtls.VerificationFuncParams) (*advancedtls.VerificationResults, error) {
// This message is to show the certificate under the hood is actually reloaded.
fmt.Printf("Client common name: %s.\n", params.Leaf.Subject.CommonName)
return &advancedtls.VerificationResults{}, nil
},
VType: advancedtls.CertVerification,
}
serverTLSCreds, err := advancedtls.NewServerCreds(options)
if err != nil {
log.Fatalf("advancedtls.NewServerCreds(%v) failed: %v", options, err)
}
s := grpc.NewServer(grpc.Creds(serverTLSCreds), grpc.KeepaliveParams(keepalive.ServerParameters{
// Set the max connection time to be 0.5 s to force the client to
// re-establish the connection, and hence re-invoke the verification
// callback.
MaxConnectionAge: 500 * time.Millisecond,
}))
lis, err := net.Listen("tcp", port)
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
pb.RegisterGreeterServer(s, greeterServer{})
if err := s.Serve(lis); err != nil {
log.Fatalf("failed to serve: %v", err)
}
}