-
Notifications
You must be signed in to change notification settings - Fork 400
/
grpc_service.go
139 lines (116 loc) · 3.93 KB
/
grpc_service.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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/*
Copyright 2022 The Kubernetes 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.
*/
// Package kmsv2 transforms values for storage at rest using a Envelope provider
package kmsv2
import (
"context"
"fmt"
"net"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apiserver/pkg/storage/value/encrypt/envelope/util"
"k8s.io/klog/v2"
kmsapi "k8s.io/kms/apis/v2alpha1"
)
const (
// unixProtocol is the only supported protocol for remote KMS provider.
unixProtocol = "unix"
)
// The gRPC implementation for envelope.Service.
type gRPCService struct {
kmsClient kmsapi.KeyManagementServiceClient
connection *grpc.ClientConn
callTimeout time.Duration
}
// NewGRPCService returns an envelope.Service which use gRPC to communicate the remote KMS provider.
func NewGRPCService(ctx context.Context, endpoint string, callTimeout time.Duration) (Service, error) {
klog.V(4).Infof("Configure KMS provider with endpoint: %s", endpoint)
addr, err := util.ParseEndpoint(endpoint)
if err != nil {
return nil, err
}
s := &gRPCService{callTimeout: callTimeout}
s.connection, err = grpc.Dial(
addr,
grpc.WithTransportCredentials(insecure.NewCredentials()),
grpc.WithDefaultCallOptions(grpc.WaitForReady(true)),
grpc.WithContextDialer(
func(context.Context, string) (net.Conn, error) {
// Ignoring addr and timeout arguments:
// addr - comes from the closure
c, err := net.DialUnix(unixProtocol, nil, &net.UnixAddr{Name: addr})
if err != nil {
klog.Errorf("failed to create connection to unix socket: %s, error: %v", addr, err)
} else {
klog.V(4).Infof("Successfully dialed Unix socket %v", addr)
}
return c, err
}))
if err != nil {
return nil, fmt.Errorf("failed to create connection to %s, error: %v", endpoint, err)
}
s.kmsClient = kmsapi.NewKeyManagementServiceClient(s.connection)
go func() {
defer utilruntime.HandleCrash()
<-ctx.Done()
_ = s.connection.Close()
}()
return s, nil
}
// Decrypt a given data string to obtain the original byte data.
func (g *gRPCService) Decrypt(ctx context.Context, uid string, req *DecryptRequest) ([]byte, error) {
ctx, cancel := context.WithTimeout(ctx, g.callTimeout)
defer cancel()
request := &kmsapi.DecryptRequest{
Ciphertext: req.Ciphertext,
Uid: uid,
KeyId: req.KeyID,
Annotations: req.Annotations,
}
response, err := g.kmsClient.Decrypt(ctx, request)
if err != nil {
return nil, err
}
return response.Plaintext, nil
}
// Encrypt bytes to a string ciphertext.
func (g *gRPCService) Encrypt(ctx context.Context, uid string, plaintext []byte) (*EncryptResponse, error) {
ctx, cancel := context.WithTimeout(ctx, g.callTimeout)
defer cancel()
request := &kmsapi.EncryptRequest{
Plaintext: plaintext,
Uid: uid,
}
response, err := g.kmsClient.Encrypt(ctx, request)
if err != nil {
return nil, err
}
return &EncryptResponse{
Ciphertext: response.Ciphertext,
KeyID: response.KeyId,
Annotations: response.Annotations,
}, nil
}
// Status returns the status of the KMSv2 provider.
func (g *gRPCService) Status(ctx context.Context) (*StatusResponse, error) {
ctx, cancel := context.WithTimeout(ctx, g.callTimeout)
defer cancel()
request := &kmsapi.StatusRequest{}
response, err := g.kmsClient.Status(ctx, request)
if err != nil {
return nil, err
}
return &StatusResponse{Version: response.Version, Healthz: response.Healthz, KeyID: response.KeyId}, nil
}