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pkisetup.go
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pkisetup.go
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package pki
import (
"crypto/x509"
"crypto/x509/pkix"
"fmt"
"net"
"os"
"path"
"strings"
"time"
"github.com/dueckminor/mypi-tools/go/config"
)
type PkiGenerator struct {
PkiDir string
CA CA
}
func (p *PkiGenerator) getFileName(name, certType string) string {
name = strings.ReplaceAll(name, ".", "_")
return path.Join(p.PkiDir, name+"_"+certType)
}
func (p *PkiGenerator) loadCa(name string) (ca CA, err error) {
name = p.getFileName(name, "ca")
return LoadCA(name)
}
func (p *PkiGenerator) GenerateRoot() (err error) {
if p.CA != nil {
return nil
}
p.CA, err = p.loadCa("root")
if err == nil {
return nil
}
err = os.MkdirAll(p.PkiDir, os.ModePerm)
if err != nil {
return err
}
p.CA, err = CreateRootCA("MyPi-ROOT-CA")
if err != nil {
return err
}
err = p.CA.Save(p.getFileName("root", "ca"))
if err != nil {
return err
}
return nil
}
func (p *PkiGenerator) GenerateServerCert(name string, dns ...string) (err error) {
err = p.GenerateRoot()
if err != nil {
return err
}
id, err := CreateIdentity()
if err != nil {
return err
}
template := &x509.Certificate{
Subject: pkix.Name{CommonName: name},
DNSNames: dns,
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(1, 0, 0),
}
_, err = p.CA.IssueCertificate(id, template)
if err != nil {
return err
}
return id.Save(p.getFileName(name, "tls"))
}
func Setup() {
mypiRoot := config.GetRoot()
mypiCfg := config.GetConfig()
fmt.Println("mypiRoot:", mypiRoot)
fmt.Println("mypiCfg:", mypiCfg)
hostname := mypiCfg.GetString("config", "hostname")
if len(hostname) == 0 {
panic("hostname not configured")
}
p := &PkiGenerator{}
p.PkiDir = path.Join(mypiRoot, "/config/pki")
err := p.GenerateRoot()
if err != nil {
panic(err)
}
dNSNames := []string{hostname}
for _, hostname := range mypiCfg.GetArray("config", "hostnames") {
dNSNames = append(dNSNames, hostname.GetString())
}
_, err = LoadIdentity(mypiRoot + "/config/pki/tls")
if err != nil {
template := &x509.Certificate{
Subject: pkix.Name{CommonName: hostname},
DNSNames: dNSNames,
IPAddresses: []net.IP{net.IPv4(127, 0, 0, 1)},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(20, 0, 0),
}
id := &IdentityImpl{}
id.CreateKeyPair()
id.certificate, err = p.CA.IssueCertificate(id, template)
if err != nil {
panic(err)
}
err = id.Save(mypiRoot + "/config/pki/tls")
if err != nil {
panic(err)
}
}
}