works

lib/gat/modules/ssl_endpoint/module.go

 package ssl_endpoint
 
 import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"math/big"
+	"net"
+	"time"
+
+	"tuxpa.in/a/zlog/log"
+
 	"pggat/lib/gat"
 	"pggat/lib/util/strutil"
 )
 
-type Module struct{}
+type Module struct {
+	config *tls.Config
+}
 
 func NewModule() (*Module, error) {
 	return &Module{}, nil
 }
 
+func (T *Module) generateKeys() error {
+	// generate private key
+	priv, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return err
+	}
+
+	keyUsage := x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment
+
+	notBefore := time.Now()
+	notAfter := notBefore.Add(3 * 30 * 24 * time.Hour)
+
+	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
+	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
+	if err != nil {
+		return err
+	}
+
+	template := x509.Certificate{
+		SerialNumber: serialNumber,
+		Subject: pkix.Name{
+			Organization: []string{"GFX Labs"},
+		},
+		NotBefore: notBefore,
+		NotAfter:  notAfter,
+
+		KeyUsage:              keyUsage,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+	}
+
+	// TODO(garet)
+	template.IPAddresses = append(template.IPAddresses, net.ParseIP("192.168.1.1"))
+
+	derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv)
+	if err != nil {
+		return err
+	}
+
+	var cert tls.Certificate
+	cert.PrivateKey = priv
+	cert.Certificate = append(cert.Certificate, derBytes)
+
+	T.config = &tls.Config{
+		Certificates: []tls.Certificate{
+			cert,
+		},
+	}
+	return nil
+}
+
 func (T *Module) GatModule() {}
 
 func (T *Module) Endpoints() []gat.Endpoint {
-	// TODO(garet) gen ssl keys
+	if T.config == nil {
+		if err := T.generateKeys(); err != nil {
+			log.Printf("failed to generate ssl certificate: %v", err)
+		}
+	}
 
 	return []gat.Endpoint{
 		{
@@ -22,6 +90,7 @@ func (T *Module) Endpoints() []gat.Endpoint {
 			Address: ":5432",
 			AcceptOptions: gat.FrontendAcceptOptions{
 				SSLRequired: false,
+				SSLConfig:   T.config,
 				AllowedStartupOptions: []strutil.CIString{
 					strutil.MakeCIString("client_encoding"),
 					strutil.MakeCIString("datestyle"),