/
tls.go
106 lines (93 loc) · 2.65 KB
/
tls.go
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/*
* Copyright 2021 The Gort 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 service
import (
"bytes"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"math/big"
"os"
"time"
)
func generateKeyBytes() ([]byte, []byte, error) {
ca := &x509.Certificate{
SerialNumber: big.NewInt(2019),
Subject: pkix.Name{
Organization: []string{"Company, Inc."},
StreetAddress: []string{"2020 5th Avenue"},
Locality: []string{"New York"},
Province: []string{"NY"},
PostalCode: []string{"10000"},
Country: []string{"US"},
},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
IsCA: true,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
BasicConstraintsValid: true,
}
caPrivKey, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
return nil, nil, err
}
caBytes, err := x509.CreateCertificate(rand.Reader, ca, ca, &caPrivKey.PublicKey, caPrivKey)
if err != nil {
return nil, nil, err
}
caPEM := new(bytes.Buffer)
pem.Encode(caPEM, &pem.Block{
Type: "CERTIFICATE",
Bytes: caBytes,
})
caPrivKeyPEM := new(bytes.Buffer)
pem.Encode(caPrivKeyPEM, &pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: x509.MarshalPKCS1PrivateKey(caPrivKey),
})
return caPEM.Bytes(), caPrivKeyPEM.Bytes(), nil
}
func GenerateTemporaryTLSKeys() (string, string, error) {
filemode := os.FileMode(0600)
certBytes, keyBytes, err := generateKeyBytes()
if err != nil {
return "", "", err
}
certFile, err := os.CreateTemp("", "gort.c.")
if err != nil {
return "", "", err
}
if err := certFile.Chmod(filemode); err != nil {
return "", "", err
}
if _, key := certFile.Write(certBytes); key != nil {
return "", "", err
}
keyFile, err := os.CreateTemp("", "gort.k.")
if err != nil {
return "", "", err
}
if err := keyFile.Chmod(filemode); err != nil {
return "", "", err
}
if _, key := keyFile.Write(keyBytes); key != nil {
return "", "", err
}
return certFile.Name(), keyFile.Name(), nil
}