adding grpc mutual tls

weed/security/tls.go

@@ -0,0 +1,66 @@
+package security
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"github.com/spf13/viper"
+	"io/ioutil"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+)
+
+func LoadServerTLS(config *viper.Viper, component string) grpc.ServerOption {
+	if config == nil {
+		return nil
+	}
+
+	// load cert/key, ca cert
+	cert, err := tls.LoadX509KeyPair(config.GetString(component+".cert"), config.GetString(component+".key"))
+	if err != nil {
+		glog.Errorf("load cert/key error: %v", err)
+		return nil
+	}
+	caCert, err := ioutil.ReadFile(config.GetString("ca"))
+	if err != nil {
+		glog.Errorf("read ca cert file error: %v", err)
+		return nil
+	}
+	caCertPool := x509.NewCertPool()
+	caCertPool.AppendCertsFromPEM(caCert)
+	ta := credentials.NewTLS(&tls.Config{
+		Certificates: []tls.Certificate{cert},
+		ClientCAs:    caCertPool,
+		ClientAuth:   tls.RequireAndVerifyClientCert,
+	})
+
+	return grpc.Creds(ta)
+}
+
+func LoadClientTLS(config *viper.Viper, component string) grpc.DialOption {
+	if config == nil {
+		return grpc.WithInsecure()
+	}
+
+	// load cert/key, cacert
+	cert, err := tls.LoadX509KeyPair(config.GetString(component+".cert"), config.GetString(component+".key"))
+	if err != nil {
+		glog.Errorf("load cert/key error: %v", err)
+		return grpc.WithInsecure()
+	}
+	caCert, err := ioutil.ReadFile(config.GetString("ca"))
+	if err != nil {
+		glog.Errorf("read ca cert file error: %v", err)
+		return grpc.WithInsecure()
+	}
+	caCertPool := x509.NewCertPool()
+	caCertPool.AppendCertsFromPEM(caCert)
+
+	ta := credentials.NewTLS(&tls.Config{
+		Certificates:       []tls.Certificate{cert},
+		RootCAs:            caCertPool,
+		InsecureSkipVerify: true,
+	})
+	return grpc.WithTransportCredentials(ta)
+}