You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
1.9 KiB
77 lines
1.9 KiB
// 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 protocol
|
|
|
|
import (
|
|
"crypto/ecdsa"
|
|
"crypto/elliptic"
|
|
"crypto/rand"
|
|
"crypto/tls"
|
|
"crypto/x509"
|
|
"crypto/x509/pkix"
|
|
"math/big"
|
|
"time"
|
|
)
|
|
|
|
type DeviceCertificate struct {
|
|
key *ecdsa.PrivateKey
|
|
cert []byte
|
|
}
|
|
|
|
func (d *DeviceCertificate) TLSCertificate() *tls.Certificate {
|
|
return &tls.Certificate{
|
|
PrivateKey: d.key,
|
|
Certificate: [][]byte{d.cert},
|
|
}
|
|
}
|
|
|
|
// GenerateDeviceCertificate returns a device certificate
|
|
func GenerateDeviceCertificate(entity string) (*DeviceCertificate, error) {
|
|
limit := big.Int{}
|
|
limit.Lsh(big.NewInt(1), 128)
|
|
serial, err := rand.Int(rand.Reader, &limit)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
priv, err := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
startTime := time.Now()
|
|
// 10 years from now
|
|
expireTime := startTime.AddDate(10, 0, 0)
|
|
|
|
template := x509.Certificate{
|
|
SerialNumber: serial,
|
|
Subject: pkix.Name{
|
|
CommonName: entity,
|
|
Organization: []string{"mconnect"},
|
|
OrganizationalUnit: []string{"mconnect"},
|
|
},
|
|
NotBefore: startTime,
|
|
NotAfter: expireTime,
|
|
BasicConstraintsValid: true,
|
|
}
|
|
selfSign := template
|
|
cert, err := x509.CreateCertificate(rand.Reader, &template, &selfSign,
|
|
&priv.PublicKey, priv)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
devcert := &DeviceCertificate{
|
|
key: priv,
|
|
cert: cert,
|
|
}
|
|
return devcert, nil
|
|
}
|