116 lines
2.8 KiB
Go
116 lines
2.8 KiB
Go
package handlers
|
|
|
|
import (
|
|
"crypto/ecdsa"
|
|
"crypto/rand"
|
|
"crypto/rsa"
|
|
"crypto/x509"
|
|
"encoding/pem"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"log"
|
|
"math/big"
|
|
"net/http"
|
|
"time"
|
|
|
|
"git.klink.asia/paul/certman/views"
|
|
|
|
"github.com/jinzhu/gorm"
|
|
)
|
|
|
|
func ListCertHandler(db *gorm.DB) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, req *http.Request) {
|
|
v := views.New(req)
|
|
v.Render(w, "cert_list")
|
|
}
|
|
}
|
|
|
|
func GenCertHandler(db *gorm.DB) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, req *http.Request) {
|
|
v := views.New(req)
|
|
|
|
key, err := rsa.GenerateKey(rand.Reader, 2048)
|
|
if err != nil {
|
|
log.Fatalf("Could not generate keypair: %s", err)
|
|
}
|
|
|
|
caCert, caKey, err := loadX509KeyPair("ca.crt", "ca.key")
|
|
if err != nil {
|
|
v.Render(w, "500")
|
|
log.Fatalf("error loading ca keyfiles: %s", err)
|
|
}
|
|
|
|
derBytes, err := CreateCertificate(key, caCert, caKey)
|
|
pem.Encode(w, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
|
|
|
|
pkBytes := x509.MarshalPKCS1PrivateKey(key)
|
|
pem.Encode(w, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: pkBytes})
|
|
return
|
|
}
|
|
}
|
|
|
|
func loadX509KeyPair(certFile, keyFile string) (*x509.Certificate, *rsa.PrivateKey, error) {
|
|
cf, err := ioutil.ReadFile(certFile)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
kf, err := ioutil.ReadFile(keyFile)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
cpb, cr := pem.Decode(cf)
|
|
fmt.Println(string(cr))
|
|
kpb, kr := pem.Decode(kf)
|
|
fmt.Println(string(kr))
|
|
crt, err := x509.ParseCertificate(cpb.Bytes)
|
|
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
key, err := x509.ParsePKCS1PrivateKey(kpb.Bytes)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
return crt, key, nil
|
|
}
|
|
|
|
// CreateCertificate creates a CA-signed certificate
|
|
func CreateCertificate(key interface{}, caCert *x509.Certificate, caKey interface{}) ([]byte, error) {
|
|
subj := caCert.Subject
|
|
// .. except for the common name
|
|
subj.CommonName = "clientName"
|
|
|
|
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
|
|
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
|
|
if err != nil {
|
|
log.Fatalf("Obscure error in cert serial number generation: %s", err)
|
|
}
|
|
|
|
template := x509.Certificate{
|
|
SerialNumber: serialNumber,
|
|
Subject: subj,
|
|
|
|
NotBefore: time.Now(),
|
|
NotAfter: time.Now().Add(24 * time.Hour * 356 * 5),
|
|
|
|
SignatureAlgorithm: x509.SHA256WithRSA,
|
|
//KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageDataEncipherment,
|
|
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
|
|
BasicConstraintsValid: true,
|
|
}
|
|
|
|
return x509.CreateCertificate(rand.Reader, &template, caCert, publicKey(key), caKey)
|
|
}
|
|
|
|
func publicKey(priv interface{}) interface{} {
|
|
switch k := priv.(type) {
|
|
case *rsa.PrivateKey:
|
|
return &k.PublicKey
|
|
case *ecdsa.PrivateKey:
|
|
return &k.PublicKey
|
|
default:
|
|
return nil
|
|
}
|
|
}
|