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| package main
import ( "bytes" "context" "crypto/tls" "filippo.io/age" "flag" "fmt" "github.com/mholt/archiver/v4" "io" "log" "net/http" "os" "os/exec" "os/user" "path" "time" )
var src = "" var dst = "" var post = "" var passphrase = ""
func init() { currentUser, err := user.Current() check(err) if currentUser.Username != "root" { panic("must be run with root user") } }
func check(e error) { if e != nil { panic(e) } }
func generateTar() *bytes.Buffer { fullchain := path.Join(src, "fullchain.pem") if info, err := os.Lstat(fullchain); os.IsNotExist(err) || info == nil { panic("fullchain not exists or can't readable") } else { isSymlink := info.Mode()&os.ModeSymlink == os.ModeSymlink if isSymlink { f, err := os.CreateTemp("/tmp", "ssl") defer os.Remove(f.Name()) check(err) input, err := os.Open(fullchain) defer input.Close() check(err) io.Copy(f, input) fullchain = f.Name() } } privkey := path.Join(src, "privkey.pem") if info, err := os.Lstat(privkey); os.IsNotExist(err) { panic("privkey not exists or can't readable") } else { isSymlink := info.Mode()&os.ModeSymlink == os.ModeSymlink if isSymlink { f, err := os.CreateTemp("/tmp", "ssl") defer os.Remove(f.Name()) check(err) input, err := os.Open(privkey) defer input.Close() check(err) io.Copy(f, input) privkey = f.Name() } } files, err := archiver.FilesFromDisk(nil, map[string]string{ fullchain: "fullchain.pem", privkey: "privkey.pem", }) check(err) buf := bytes.NewBuffer(nil) format := archiver.CompressedArchive{ Compression: archiver.Gz{}, Archival: archiver.Tar{}, } err = format.Archive(context.Background(), buf, files) return buf }
func encryptFile(inputBuffer *bytes.Buffer) { r, err := age.NewScryptRecipient(passphrase) r.SetWorkFactor(8) f, err := os.Create(dst) check(err)
w, err := age.Encrypt(f, r) check(err) defer w.Close() io.Copy(w, inputBuffer) }
func fileCompare(src, dst string) bool { if _, err := os.Stat(dst); os.IsNotExist(err) { return false } f1, err := os.Open(src) check(err) defer f1.Close()
f2, err := os.Open(dst) check(err) defer f2.Close()
for { b1 := make([]byte, 1024) _, err1 := f1.Read(b1)
b2 := make([]byte, 1024) _, err2 := f2.Read(b2)
if err1 != nil || err2 != nil { if err1 == io.EOF && err2 == io.EOF { return true } else if err1 == io.EOF || err2 == io.EOF { return false } else { log.Fatal(err1, err2) } }
if !bytes.Equal(b1, b2) { return false } } }
func moveFile(sourcePath, destPath string) { inputFile, err := os.Open(sourcePath) defer inputFile.Close() check(err)
outputFile, err := os.Create(destPath) defer outputFile.Close() check(err)
_, err = io.Copy(outputFile, inputFile) check(err) }
func downloadFile() { temp, err := os.CreateTemp("/tmp", "ssl") defer temp.Close() check(err) transCfg := &http.Transport{ TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, } client := http.Client{ Timeout: 10 * time.Second, Transport: transCfg, } resp, err := client.Get(src) defer resp.Body.Close() check(err) io.Copy(temp, resp.Body) src = temp.Name() }
func decryptFile() { f, err := os.Open(src) check(err) i, err := age.NewScryptIdentity(passphrase) defer f.Close() r.SetWorkFactor(8) r, err := age.Decrypt(f, i) check(err) temp, err := os.CreateTemp("/tmp", "ssl") defer os.Remove(temp.Name()) check(err) _, err = io.Copy(temp, r) check(err) temp.Seek(0, io.SeekStart) format := archiver.CompressedArchive{ Compression: archiver.Gz{}, Archival: archiver.Tar{}, }
tempfullchain, err := os.CreateTemp("/tmp", "ssl") defer os.Remove(tempfullchain.Name()) check(err) tempprivkey, err := os.CreateTemp("/tmp", "ssl") defer os.Remove(tempprivkey.Name()) check(err)
handler := func(ctx context.Context, f archiver.File) error { rc, err := f.Open() check(err) defer rc.Close() if f.Name() == "fullchain.pem" { io.Copy(tempfullchain, rc) } if f.Name() == "privkey.pem" { io.Copy(tempprivkey, rc) } return nil } err = format.Extract(context.Background(), temp, nil, handler) check(err) if _, err := os.Stat(dst); os.IsNotExist(err) { err = os.MkdirAll(dst, 0700) check(err) } if (fileCompare(tempfullchain.Name(), path.Join(dst, "fullchain.pem")) == false) || (fileCompare(tempprivkey.Name(), path.Join(dst, "privkey.pem")) == false) { moveFile(tempfullchain.Name(), path.Join(dst, "fullchain.pem")) moveFile(tempprivkey.Name(), path.Join(dst, "privkey.pem")) if len(post) > 0 { cmd := exec.Command("sudo", "bash", "-c", post) err = cmd.Run() check(err) } } }
func main() { c := flag.Bool("c", false, "client role") s := flag.Bool("s", false, "server role") srcf := flag.String("src", "", "certificate source address") dstf := flag.String("dst", "", "certificate storage destination") passphrasef := flag.String("p", "", "encryption/decryption password") postf := flag.String("post", "", "commands executed after certificate update") flag.Usage = func() { fmt.Fprintf(os.Stderr, "for server:\n") fmt.Fprintf(os.Stderr, "sudo ./ssl_distribute -s -src /etc/letsencrypt/live/xx.com -dst file -p 123456\n") fmt.Fprintf(os.Stderr, "for client:\n") fmt.Fprintf(os.Stderr, "sudo ./ssl_distribute -c -src http://127.0.0.1:8000/file -dst . -p 123456 -post \"systemctl reload nginx\"\n") flag.PrintDefaults() } flag.Parse()
src = *srcf dst = *dstf passphrase = *passphrasef post = *postf if *c { downloadFile() decryptFile() defer os.Remove(src) } else if *s { buf := generateTar() encryptFile(buf) } else { panic("must be client or server") } }
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