mirror of
https://github.com/jech/galene.git
synced 2024-11-22 08:35:57 +01:00
Move certificate handling into a separate module.
This commit is contained in:
Juliusz Chroboczek
parent
31491aba9b
commit
f837c59d60
5 changed files with 11 additions and 197 deletions
1
go.mod
1
go.mod
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@ -5,6 +5,7 @@ go 1.13
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require (
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github.com/at-wat/ebml-go v0.16.0
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github.com/gorilla/websocket v1.4.2
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github.com/jech/cert v0.0.0-20210819231831-aca735647728
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github.com/jech/samplebuilder v0.0.0-20210711185346-d34c6dd315fb
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github.com/pion/ice/v2 v2.1.10
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github.com/pion/rtcp v1.2.6
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4
go.sum
4
go.sum
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@ -22,6 +22,10 @@ github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
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github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
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github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
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github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
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github.com/jech/cert v0.0.0-20210819214059-b84cf5e78f7a h1:3VzfD0n6o2Y3FW6cluxqj535fT9Uq3ANaYkG1JuiADI=
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github.com/jech/cert v0.0.0-20210819214059-b84cf5e78f7a/go.mod h1:FXUA/zpiQfV4uBVN2kAwkf3X7pU7l1l2ovS45CsSYZs=
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github.com/jech/cert v0.0.0-20210819231831-aca735647728 h1:tN+W1ll2oKuJGMCaO1CRK4rr+xSRjVSfWmnKlACdx38=
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github.com/jech/cert v0.0.0-20210819231831-aca735647728/go.mod h1:FXUA/zpiQfV4uBVN2kAwkf3X7pU7l1l2ovS45CsSYZs=
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github.com/jech/samplebuilder v0.0.0-20210711185346-d34c6dd315fb h1:ctDbFqRHUmxTThbYcTP2cdOVOkECsvhNyQKqeEK7RQQ=
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github.com/jech/samplebuilder v0.0.0-20210711185346-d34c6dd315fb/go.mod h1:PXhvo7PKy8CVqirCgoNG2BIjwow2Zd6LwCTScabl584=
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github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
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@ -1,145 +0,0 @@
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package webserver
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/tls"
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"crypto/x509"
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"errors"
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"log"
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"math/big"
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"os"
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"path/filepath"
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"sync"
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"sync/atomic"
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"time"
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)
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type certInfo struct {
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certificate *tls.Certificate
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keyTime time.Time
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certTime time.Time
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}
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// certMu protects writing to certificate
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var certMu sync.Mutex
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// certificate holds our current certificate, of type certInfo
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var certificate atomic.Value
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// generateCertificate generates a self-signed certficate
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func generateCertificate() (tls.Certificate, error) {
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priv, err := rsa.GenerateKey(rand.Reader, 2048)
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if err != nil {
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return tls.Certificate{}, err
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}
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serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
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serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
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now := time.Now()
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template := x509.Certificate{
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SerialNumber: serialNumber,
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NotBefore: now,
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NotAfter: now.Add(365 * 24 * time.Hour),
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KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
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BasicConstraintsValid: true,
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}
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bytes, err := x509.CreateCertificate(
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rand.Reader, &template, &template, &priv.PublicKey, priv,
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)
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if err != nil {
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return tls.Certificate{}, err
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}
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return tls.Certificate{
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Certificate: [][]byte{bytes},
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PrivateKey: priv,
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}, nil
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}
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func modTime(filename string) time.Time {
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fi, err := os.Stat(filename)
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if err != nil {
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if !os.IsNotExist(err) {
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log.Printf("%v: %v", filename, err)
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}
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return time.Time{}
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}
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return fi.ModTime()
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}
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// loadCertificate returns the current certificate if it is still valid.
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func loadCertificate(certFile string, certTime time.Time, keyFile string, keyTime time.Time) *certInfo {
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info, ok := certificate.Load().(*certInfo)
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if !ok {
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return nil
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}
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if !info.certTime.Equal(certTime) || !info.keyTime.Equal(keyTime) {
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return nil
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}
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return info
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}
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// storeCertificate returns the current certificate if it is still valid,
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// and either reads or generates a new one otherwise.
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func storeCertificate(certFile string, certTime time.Time, keyFile string, keyTime time.Time) (info *certInfo, err error) {
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certMu.Lock()
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defer certMu.Unlock()
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// the certificate may have been updated since we checked
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info = loadCertificate(certFile, certTime, keyFile, keyTime)
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if info != nil {
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return
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}
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var cert tls.Certificate
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nocert := certTime.Equal(time.Time{})
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nokey := keyTime.Equal(time.Time{})
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if nocert != nokey {
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err = errors.New("only one of cert.pem and key.pem exists")
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return
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} else if nokey {
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log.Printf("Generating self-signed certificate")
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cert, err = generateCertificate()
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if err != nil {
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return
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}
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} else {
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cert, err = tls.LoadX509KeyPair(certFile, keyFile)
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if err != nil {
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return
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}
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}
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info = &certInfo{
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certificate: &cert,
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certTime: certTime,
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keyTime: keyTime,
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}
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certificate.Store(info)
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return
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}
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func getCertificate(dataDir string) (*tls.Certificate, error) {
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certFile := filepath.Join(dataDir, "cert.pem")
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keyFile := filepath.Join(dataDir, "key.pem")
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certTime := modTime(certFile)
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keyTime := modTime(keyFile)
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info := loadCertificate(certFile, certTime, keyFile, keyTime)
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if info == nil {
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var err error
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info, err = storeCertificate(
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certFile, certTime, keyFile, keyTime,
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)
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if info == nil || err != nil {
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return nil, err
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}
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}
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return info.certificate, nil
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}
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@ -1,51 +0,0 @@
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package webserver
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import (
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"testing"
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)
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func TestGenerateCertificate(t *testing.T) {
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_, err := generateCertificate()
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if err != nil {
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t.Errorf("generateCertificate: %v", err)
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}
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}
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func BenchmarkGenerateCertificate(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_, err := generateCertificate()
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if err != nil {
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b.Errorf("generateCertificate: %v", err)
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}
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}
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}
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func TestGetCertificate(t *testing.T) {
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cert1, err := getCertificate("/tmp/no/such/file")
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if err != nil {
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t.Errorf("getCertificate: %v", err)
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}
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cert2, err := getCertificate("/tmp/no/such/file")
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if err != nil {
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t.Errorf("getCertificate: %v", err)
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}
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if cert1 != cert2 {
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t.Errorf("cert1 != cert2")
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}
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}
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func BenchmarkGetCertificate(b *testing.B) {
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_, err := getCertificate("/tmp/no/such/file")
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if err != nil {
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b.Errorf("getCertificate: %v", err)
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}
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b.StartTimer()
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for i := 0; i < b.N; i++ {
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_, err := getCertificate("/tmp/no/such/file")
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if err != nil {
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b.Errorf("getCertificate: %v", err)
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}
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}
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}
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@ -22,6 +22,7 @@ import (
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"github.com/gorilla/websocket"
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"github.com/jech/cert"
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"github.com/jech/galene/diskwriter"
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"github.com/jech/galene/group"
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"github.com/jech/galene/rtpconn"
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@ -58,9 +59,13 @@ func Serve(address string, dataDir string) error {
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IdleTimeout: 120 * time.Second,
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}
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if !Insecure {
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certificate := cert.New(
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filepath.Join(dataDir, "cert.pem"),
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filepath.Join(dataDir, "key.pem"),
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)
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s.TLSConfig = &tls.Config{
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GetCertificate: func(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
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return getCertificate(dataDir)
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return certificate.Get()
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},
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}
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}
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