golang使用TLSv1.2证书创建安全服务器.
http server
package main
import (
"crypto/tls"
"log"
"net/http"
"time"
)
func main() {
// crt file
certPem := []byte(`-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`)
// private key file
keyPem := []byte(`-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIIrYSSNQFaA2Hwf1duRSxKtLYX5CB04fSeQ6tF1aY/PuoAoGCCqGSM49
AwEHoUQDQgAEPR3tU2Fta9ktY+6P9G0cWO+0kETA6SFs38GecTyudlHz6xvCdz8q
EKTcWGekdmdDPsHloRNtsiCa697B2O9IFA==
-----END EC PRIVATE KEY-----`)
cert, err := tls.X509KeyPair(certPem, keyPem)
if err != nil {
log.Fatal(err)
}
cfg := &tls.Config{Certificates: []tls.Certificate{cert}}
srv := &http.Server{
TLSConfig: cfg,
ReadTimeout: time.Minute,
WriteTimeout: time.Minute,
}
log.Fatal(srv.ListenAndServeTLS("", "")) // => listen on 443
}
tcp server
package main
import (
"crypto/tls"
"log"
)
func main() {
certPem := []byte(`-----BEGIN CERTIFICATE-----
MIIBhTCCASugAwIBAgIQIRi6zePL6mKjOipn+dNuaTAKBggqhkjOPQQDAjASMRAw
DgYDVQQKEwdBY21lIENvMB4XDTE3MTAyMDE5NDMwNloXDTE4MTAyMDE5NDMwNlow
EjEQMA4GA1UEChMHQWNtZSBDbzBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABD0d
7VNhbWvZLWPuj/RtHFjvtJBEwOkhbN/BnnE8rnZR8+sbwnc/KhCk3FhnpHZnQz7B
5aETbbIgmuvewdjvSBSjYzBhMA4GA1UdDwEB/wQEAwICpDATBgNVHSUEDDAKBggr
BgEFBQcDATAPBgNVHRMBAf8EBTADAQH/MCkGA1UdEQQiMCCCDmxvY2FsaG9zdDo1
NDUzgg4xMjcuMC4wLjE6NTQ1MzAKBggqhkjOPQQDAgNIADBFAiEA2zpJEPQyz6/l
Wf86aX6PepsntZv2GYlA5UpabfT2EZICICpJ5h/iI+i341gBmLiAFQOyTDT+/wQc
6MF9+Yw1Yy0t
-----END CERTIFICATE-----`)
keyPem := []byte(`-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIIrYSSNQFaA2Hwf1duRSxKtLYX5CB04fSeQ6tF1aY/PuoAoGCCqGSM49
AwEHoUQDQgAEPR3tU2Fta9ktY+6P9G0cWO+0kETA6SFs38GecTyudlHz6xvCdz8q
EKTcWGekdmdDPsHloRNtsiCa697B2O9IFA==
-----END EC PRIVATE KEY-----`)
cert, err := tls.X509KeyPair(certPem, keyPem)
if err != nil {
log.Fatal(err)
}
cfg := &tls.Config{Certificates: []tls.Certificate{cert}}
listener, err := tls.Listen("tcp", ":2000", cfg)
if err != nil {
log.Fatal(err)
}
_ = listener
}
生成SSL证书
bash
# signed.key 私钥文件
# signed.crt 证书文件
openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout signed.key -out signed.crt
golang API
func generateSelfSigned(host string) ([]byte,[]byte,error){
validFrom := time.Now().Add(-time.Hour) // valid an hour earlier to avoid flakes due to clock skew
maxAge := time.Hour * 24 * 365 // one year self-signed certs
caKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return nil, nil, err
}
caTemplate := x509.Certificate{
SerialNumber: big.NewInt(1),
Subject: pkix.Name{
CommonName: fmt.Sprintf("%s-ca@%d", host, time.Now().Unix()),
},
NotBefore: validFrom,
NotAfter: validFrom.Add(maxAge),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
BasicConstraintsValid: true,
IsCA: true,
}
caDERBytes, err := x509.CreateCertificate(rand.Reader, &caTemplate, &caTemplate, &caKey.PublicKey, caKey)
if err != nil {
return nil, nil, err
}
// Generate cert, followed by ca
certBuffer := bytes.Buffer{}
if err := pem.Encode(&certBuffer, &pem.Block{Type: CertificateBlockType, Bytes: caDERBytes}); err != nil {
return nil, nil, err
}
// Generate key
keyBuffer := bytes.Buffer{}
if err := pem.Encode(&keyBuffer, &pem.Block{Type: RSAPrivateKeyBlockType, Bytes: x509.MarshalPKCS1PrivateKey(caKey)}); err != nil {
return nil, nil, err
}
// cA证书，私钥
return certBuffer.Bytes(),keyBuffer.Bytes(),nil
综合案例:
一个使用SSL证书的TCP简单服务器
package main
import (
"bytes"
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"fmt"
"log"
"math/big"
"net"
"os"
"time"
)
const (
// CertificateBlockType is a possible value for pem.Block.Type.
CertificateBlockType = "CERTIFICATE"
// CertificateRequestBlockType is a possible value for pem.Block.Type.
CertificateRequestBlockType = "CERTIFICATE REQUEST"
)
const (
// ECPrivateKeyBlockType is a possible value for pem.Block.Type.
ECPrivateKeyBlockType = "EC PRIVATE KEY"
// RSAPrivateKeyBlockType is a possible value for pem.Block.Type.
RSAPrivateKeyBlockType = "RSA PRIVATE KEY"
// PrivateKeyBlockType is a possible value for pem.Block.Type.
PrivateKeyBlockType = "PRIVATE KEY"
// PublicKeyBlockType is a possible value for pem.Block.Type.
PublicKeyBlockType = "PUBLIC KEY"
)
func main() {
certPem, keyPem,err:=generateSelfSigned("localhost")
if err != nil {
log.Fatal("failed to generate self-signed cert")
}
fmt.Println("ca file content:")
fmt.Println(string(certPem))
fmt.Println("private-key file content:")
fmt.Println(string(keyPem))
cert, err := tls.X509KeyPair(certPem, keyPem)
if err != nil {
log.Fatal(err)
}
cfg := &tls.Config{Certificates: []tls.Certificate{cert}}
listener, err := tls.Listen("tcp", ":2000", cfg)
if err != nil {
log.Fatal(err)
}
for {
conn, err := listener.Accept()
if err != nil {
log.Fatal(err)
os.Exit(1)
}
// create a goroutine to serve each incoming request
go handleRequest(conn)
}
}
func handleRequest(conn net.Conn) {
// incoming request
buffer := make([]byte, 1024)
_, err := conn.Read(buffer)
if err != nil {
log.Fatal(err)
}
// write data to response
time := time.Now().Format(time.ANSIC)
responseStr := fmt.Sprintf("Your message is: %v. \n Received time: %v", string(buffer[:]), time)
conn.Write([]byte(responseStr))
// close conn
conn.Close()
}
func generateSelfSigned(host string) ([]byte,[]byte,error){
validFrom := time.Now().Add(-time.Hour) // valid an hour earlier to avoid flakes due to clock skew
maxAge := time.Hour * 24 * 365 // one year self-signed certs
caKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return nil, nil, err
}
caTemplate := x509.Certificate{
SerialNumber: big.NewInt(1),
Subject: pkix.Name{
CommonName: fmt.Sprintf("%s-ca@%d", host, time.Now().Unix()),
},
NotBefore: validFrom,
NotAfter: validFrom.Add(maxAge),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
BasicConstraintsValid: true,
IsCA: true,
}
caDERBytes, err := x509.CreateCertificate(rand.Reader, &caTemplate, &caTemplate, &caKey.PublicKey, caKey)
if err != nil {
return nil, nil, err
}
// Generate cert, followed by ca
certBuffer := bytes.Buffer{}
if err := pem.Encode(&certBuffer, &pem.Block{Type: CertificateBlockType, Bytes: caDERBytes}); err != nil {
return nil, nil, err
}
// Generate key
keyBuffer := bytes.Buffer{}
if err := pem.Encode(&keyBuffer, &pem.Block{Type: RSAPrivateKeyBlockType, Bytes: x509.MarshalPKCS1PrivateKey(caKey)}); err != nil {
return nil, nil, err
}
return certBuffer.Bytes(),keyBuffer.Bytes(),nil
}
curl测试:
[oneslide1@localhost context]$ curl -k https://localhost:2000
Your message is: GET / HTTP/1.1
User-Agent: curl/7.29.0
Host: localhost:2000
Accept: */*
.
Received time: Mon Nov 7 18:47:05 2022[
