-
Notifications
You must be signed in to change notification settings - Fork 14
/
factory.go
141 lines (124 loc) · 4 KB
/
factory.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
140
141
/*
Copyright 2020 Elotl Inc.
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 certs
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/tls"
"crypto/x509"
"github.com/docker/libkv/store"
"github.com/elotl/kip/pkg/etcd"
"github.com/elotl/kip/pkg/util"
"k8s.io/klog"
)
const (
CertificatePath string = "/milpa/certificate"
CertificateDirectoryPlaceholder string = "/milpa/certificate/."
RootCertPath string = "/milpa/certificate/root.crt"
RootKeyPath string = "/milpa/certificate/root.key"
)
type CertificateFactory struct {
Root x509.Certificate
key ecdsa.PrivateKey
kvstore etcd.Storer
}
func New(kvstore etcd.Storer) (*CertificateFactory, error) {
certFactory := &CertificateFactory{
kvstore: kvstore,
}
certFactory.kvstore.Put(CertificateDirectoryPlaceholder, []byte("."), nil)
err := certFactory.GetRootFromStore()
if err == store.ErrKeyNotFound {
klog.V(2).Infof("Initializing Kip root certificate")
certFactory.InitRootCert()
} else if err != nil {
return nil, util.WrapError(err, "Error creating Kip PKI")
}
return certFactory, nil
}
func (fac *CertificateFactory) GetRootFromStore() error {
certPair, err := fac.kvstore.Get(RootCertPath)
if err != nil {
return err
}
cert, err := UnmarshalCert(certPair.Value)
if err != nil {
return util.WrapError(err, "Error unmarshalling root cert")
}
fac.Root = *cert
keyPair, err := fac.kvstore.Get(RootKeyPath)
if err != nil {
return err
}
key, err := UnmarshalKey(keyPair.Value)
if err != nil {
return util.WrapError(err, "Error unmarshalling root key cert")
}
fac.key = *key
return nil
}
func (fac *CertificateFactory) InitRootCert() error {
privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return util.WrapError(err, "Error creating root key")
}
keyData, err := MarshalKey(privateKey)
if err != nil {
return util.WrapError(err, "Error serializing root key")
}
err = fac.kvstore.Put(RootKeyPath, keyData, nil)
if err != nil {
return util.WrapError(err, "Error writing root key to storage")
}
rootCert, err := CreateRootCert(privateKey)
if err != nil {
return util.WrapError(err, "Error creating root certificate")
}
certData, err := MarshalCert(rootCert)
if err != nil {
return util.WrapError(err, "Error serializing root cert")
}
err = fac.kvstore.Put(RootCertPath, certData, nil)
if err != nil {
return util.WrapError(err, "Error writing root cert to storage")
}
fac.Root = *rootCert
fac.key = *privateKey
return nil
}
func (fac *CertificateFactory) CreateNodeCertAndKey() (*x509.Certificate, *ecdsa.PrivateKey, error) {
privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return nil, nil, util.WrapError(err, "Error generating node key")
}
serverCert, err := CreateCert(&fac.Root, &fac.key, &privateKey.PublicKey, ServerCert)
if err != nil {
return nil, nil, util.WrapError(err, "Error generating node certificate")
}
return serverCert, privateKey, nil
}
func (fac *CertificateFactory) CreateClientCert() (*tls.Certificate, error) {
privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return nil, util.WrapError(err, "Error generating client key")
}
cert, err := CreateCert(&fac.Root, &fac.key, &privateKey.PublicKey, ClientCert)
if err != nil {
return nil, util.WrapError(err, "Error generating node certificate")
}
var tlsCert tls.Certificate
tlsCert.Certificate = append(tlsCert.Certificate, cert.Raw)
tlsCert.PrivateKey = privateKey
return &tlsCert, nil
}