feat(transport): add transport tls config (#1267)

* add http tls config

* add grpc tls config

* add examples tls

* fix resolver parseTarget

* support https for discovery

* add isSecure
* clean code

Co-authored-by: longXboy <longxboyhi@gmail.com>
Co-authored-by: 包子 <baozhecheng@foxmail.com>

examples/helloworld/client/main.go

@@ -27,6 +27,7 @@ func callHTTP() {
 	if err != nil {
 		panic(err)
 	}
+	defer conn.Close()
 	client := pb.NewGreeterHTTPClient(conn)
 	reply, err := client.SayHello(context.Background(), &pb.HelloRequest{Name: "kratos"})
 	if err != nil {
@@ -55,6 +56,7 @@ func callGRPC() {
 	if err != nil {
 		panic(err)
 	}
+	defer conn.Close()
 	client := pb.NewGreeterClient(conn)
 	reply, err := client.SayHello(context.Background(), &pb.HelloRequest{Name: "kratos"})
 	if err != nil {

examples/helloworld/server/main.go

@@ -39,18 +39,18 @@ func (s *server) SayHello(ctx context.Context, in *helloworld.HelloRequest) (*he
 
 func main() {
 	s := &server{}
-	grpcSrv := grpc.NewServer(
-		grpc.Address(":9000"),
-		grpc.Middleware(
-			recovery.Recovery(),
-		),
-	)
 	httpSrv := http.NewServer(
 		http.Address(":8000"),
 		http.Middleware(
 			recovery.Recovery(),
 		),
 	)
+	grpcSrv := grpc.NewServer(
+		grpc.Address(":9000"),
+		grpc.Middleware(
+			recovery.Recovery(),
+		),
+	)
 	helloworld.RegisterGreeterServer(grpcSrv, s)
 	helloworld.RegisterGreeterHTTPServer(httpSrv, s)
 

examples/metadata/client/main.go

@@ -27,6 +27,7 @@ func callHTTP() {
 	if err != nil {
 		panic(err)
 	}
+	defer conn.Close()
 	client := helloworld.NewGreeterHTTPClient(conn)
 	ctx := context.Background()
 	ctx = metadata.AppendToClientContext(ctx, "x-md-global-extra", "2233")
@@ -48,6 +49,7 @@ func callGRPC() {
 	if err != nil {
 		log.Fatal(err)
 	}
+	defer conn.Close()
 	client := helloworld.NewGreeterClient(conn)
 	ctx := context.Background()
 	ctx = metadata.AppendToClientContext(ctx, "x-md-global-extra", "2233")

examples/tls/README.md

@@ -0,0 +1,10 @@
+# Run the example
+
+1、Compile and execute the server code:
+```shell
+$ go run server/main.go
+```
+2、From a different terminal, compile and execute the client code:
+```shell
+$ go run client/main.go
+```

examples/tls/cert/server.crt

@@ -0,0 +1,64 @@
+
+-----BEGIN CERTIFICATE-----
+MIIFZTCCA02gAwIBAgIBATANBgkqhkiG9w0BAQUFADB8MQswCQYDVQQGEwJDTjEL
+MAkGA1UECAwCU0gxCzAJBgNVBAcMAlNIMQ8wDQYDVQQKDAZrcmF0b3MxCzAJBgNV
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+11opfl5R86GpXXbz+vNL9fWP+8cIvoGZK8RAC872bcMPEoJPjPIwAbI=
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIIFdDCCA1wCCQDHq+cGa349DzANBgkqhkiG9w0BAQsFADB8MQswCQYDVQQGEwJD
+TjELMAkGA1UECAwCU0gxCzAJBgNVBAcMAlNIMQ8wDQYDVQQKDAZrcmF0b3MxCzAJ
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+thwEzUAiHfqeX0o039sTQvJSqUY2sBko+tyDRmeNtmd3TPE5VZZSWG+TUtrOofr7
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+G0gNQazxPzdp89/UMzkczyJAKjYj4JyLCbrjzTZXjtu+rYJezxyS+3QSf0F0xVBr
+/8HCeXX6xG16WZY54Z6AijqI3sjiRBSQ25rLJJ00sWa9k1oH0Poyiv4pQG3RHgIs
+jJEQh7RQE5zAsBx2NHZ8FcsUGX2oOjSS+vtX//Bg37kN7oYx5HEtK9c+a0wWUxo8
+8cqIzqrQSWOd1CipxbE5CUUNKdGQzNCLTfLO68KitLdaSOCGoU/PaoAncbr6EjdB
+kzqJcHooqq8asl6fu1DVnYqCpEEp30ldU3p4MdclcMV0XZUq6bXFq1ylmfZXfC0t
+zSGnBUjxB5lohn5fs1S/DxyoUR8LbIFVWCljEf4jJtMRnCQV3bR3xeVTbGh3ti81
+21uhQKjIP/X2BRNAvRo1qUbrzEeHAJG3EbIG78rRFvSz6MkWVTZzeH1SgCr9Onw7
+djovWE7E6ic=
+-----END CERTIFICATE-----

examples/tls/cert/server.key

@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----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++LASymApoa5I47lTnLK8pgobDbBoG50GNEkUYVhni+2rdHiKeUPe9HoheIipHVat
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++t77vD9zCszl6uLJ2fValyjkLGu1lZZDZ7ChCqwUavXqz2yaHpAbrxzlR4VHb5cd
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+Cj/6GH2zEZ1xgZr6GxRPU4YbU6iRWHdZfGzWB6fqpfTsRFUHsJVCzB3aXffCmX0L
++yqEMoX3B+R+EdTv3SF79K5a3bAA6VQtpnwHQ83PTK7MTTDepSdM+ft+6D++iGYS
+GU5+HGahjSg+iZti9feaOUIT5OfcXjoYUT3B6+rhgTQO2OMpq3QtSJhK7ZnP6HnZ
+URRaawDhyJSqOO8Z5Z/bdaMSJHWcR1huaHF7yGoPHR06xBzaX82tsHiZbZx5pg8=
+-----END RSA PRIVATE KEY-----

examples/tls/client/main.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"io/ioutil"
+	"log"
+
+	pb "github.com/go-kratos/kratos/examples/helloworld/helloworld"
+	"github.com/go-kratos/kratos/v2/transport/grpc"
+	"github.com/go-kratos/kratos/v2/transport/http"
+)
+
+func main() {
+	b, err := ioutil.ReadFile("../cert/server.crt")
+	if err != nil {
+		panic(err)
+	}
+	cp := x509.NewCertPool()
+	if !cp.AppendCertsFromPEM(b) {
+		panic(err)
+	}
+	tlsConf := &tls.Config{ServerName: "www.kratos.com", RootCAs: cp}
+	callHTTP(tlsConf)
+	callGRPC(tlsConf)
+}
+
+func callHTTP(tlsConf *tls.Config) {
+	conn, err := http.NewClient(
+		context.Background(),
+		http.WithEndpoint("https://127.0.0.1:8000"),
+		http.WithTLSConfig(tlsConf),
+	)
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
+	client := pb.NewGreeterHTTPClient(conn)
+	reply, err := client.SayHello(context.Background(), &pb.HelloRequest{Name: "kratos"})
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Printf("[http] SayHello %s\n", reply.Message)
+}
+
+func callGRPC(tlsConf *tls.Config) {
+	conn, err := grpc.Dial(
+		context.Background(),
+		grpc.WithEndpoint("127.0.0.1:9000"),
+		grpc.WithTLSConfig(tlsConf),
+	)
+	if err != nil {
+		panic(err)
+	}
+	defer conn.Close()
+	client := pb.NewGreeterClient(conn)
+	reply, err := client.SayHello(context.Background(), &pb.HelloRequest{Name: "kratos"})
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Printf("[grpc] SayHello %+v\n", reply)
+}

examples/tls/server/main.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"log"
+
+	"github.com/go-kratos/kratos/examples/helloworld/helloworld"
+	"github.com/go-kratos/kratos/v2"
+	"github.com/go-kratos/kratos/v2/transport/grpc"
+	"github.com/go-kratos/kratos/v2/transport/http"
+)
+
+// go build -ldflags "-X main.Version=x.y.z"
+var (
+	// Name is the name of the compiled software.
+	Name = "helloworld"
+	// Version is the version of the compiled software.
+	Version = "v1.0.0"
+)
+
+// server is used to implement helloworld.GreeterServer.
+type server struct {
+	helloworld.UnimplementedGreeterServer
+}
+
+// SayHello implements helloworld.GreeterServer
+func (s *server) SayHello(ctx context.Context, in *helloworld.HelloRequest) (*helloworld.HelloReply, error) {
+	return &helloworld.HelloReply{Message: fmt.Sprintf("Hello %+v", in.Name)}, nil
+}
+
+func main() {
+	cert, err := tls.LoadX509KeyPair("../cert/server.crt", "../cert/server.key")
+	if err != nil {
+		panic(err)
+	}
+	tlsConf := &tls.Config{Certificates: []tls.Certificate{cert}}
+
+	s := &server{}
+	httpSrv := http.NewServer(
+		http.Address(":8000"),
+		http.TLSConfig(tlsConf),
+	)
+	grpcSrv := grpc.NewServer(
+		grpc.Address(":9000"),
+		grpc.TLSConfig(tlsConf),
+	)
+	helloworld.RegisterGreeterServer(grpcSrv, s)
+	helloworld.RegisterGreeterHTTPServer(httpSrv, s)
+
+	app := kratos.New(
+		kratos.Name(Name),
+		kratos.Server(
+			httpSrv,
+			grpcSrv,
+		),
+	)
+
+	if err := app.Run(); err != nil {
+		log.Fatal(err)
+	}
+}

transport/grpc/client.go

@@ -2,6 +2,7 @@ package grpc
 
 import (
 	"context"
+	"crypto/tls"
 	"time"
 
 	"github.com/go-kratos/kratos/v2/middleware"
@@ -14,6 +15,7 @@ import (
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/balancer/roundrobin"
+	"google.golang.org/grpc/credentials"
 	grpcmd "google.golang.org/grpc/metadata"
 )
 
@@ -48,6 +50,13 @@ func WithDiscovery(d registry.Discovery) ClientOption {
 	}
 }
 
+// WithTLSConfig with TLS config.
+func WithTLSConfig(c *tls.Config) ClientOption {
+	return func(o *clientOptions) {
+		o.tlsConf = c
+	}
+}
+
 // WithUnaryInterceptor returns a DialOption that specifies the interceptor for unary RPCs.
 func WithUnaryInterceptor(in ...grpc.UnaryClientInterceptor) ClientOption {
 	return func(o *clientOptions) {
@@ -65,6 +74,7 @@ func WithOptions(opts ...grpc.DialOption) ClientOption {
 // clientOptions is gRPC Client
 type clientOptions struct {
 	endpoint   string
+	tlsConf    *tls.Config
 	timeout    time.Duration
 	discovery  registry.Discovery
 	middleware []middleware.Middleware
@@ -106,6 +116,9 @@ func dial(ctx context.Context, insecure bool, opts ...ClientOption) (*grpc.Clien
 	if insecure {
 		grpcOpts = append(grpcOpts, grpc.WithInsecure())
 	}
+	if options.tlsConf != nil {
+		grpcOpts = append(grpcOpts, grpc.WithTransportCredentials(credentials.NewTLS(options.tlsConf)))
+	}
 	if len(options.grpcOpts) > 0 {
 		grpcOpts = append(grpcOpts, options.grpcOpts...)
 	}

transport/grpc/server.go

@@ -2,6 +2,7 @@ package grpc
 
 import (
 	"context"
+	"crypto/tls"
 	"net"
 	"net/url"
 	"sync"
@@ -15,6 +16,7 @@ import (
 	"github.com/go-kratos/kratos/v2/transport"
 
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/health"
 	"google.golang.org/grpc/health/grpc_health_v1"
 	grpcmd "google.golang.org/grpc/metadata"
@@ -62,6 +64,13 @@ func Middleware(m ...middleware.Middleware) ServerOption {
 	}
 }
 
+// TLSConfig with TLS config.
+func TLSConfig(c *tls.Config) ServerOption {
+	return func(s *Server) {
+		s.tlsConf = c
+	}
+}
+
 // UnaryInterceptor returns a ServerOption that sets the UnaryServerInterceptor for the server.
 func UnaryInterceptor(in ...grpc.UnaryServerInterceptor) ServerOption {
 	return func(s *Server) {
@@ -80,6 +89,7 @@ func Options(opts ...grpc.ServerOption) ServerOption {
 type Server struct {
 	*grpc.Server
 	ctx        context.Context
+	tlsConf    *tls.Config
 	lis        net.Listener
 	once       sync.Once
 	err        error
@@ -116,6 +126,9 @@ func NewServer(opts ...ServerOption) *Server {
 	var grpcOpts = []grpc.ServerOption{
 		grpc.ChainUnaryInterceptor(ints...),
 	}
+	if srv.tlsConf != nil {
+		grpcOpts = append(grpcOpts, grpc.Creds(credentials.NewTLS(srv.tlsConf)))
+	}
 	if len(srv.grpcOpts) > 0 {
 		grpcOpts = append(grpcOpts, srv.grpcOpts...)
 	}

transport/http/client.go

@@ -3,6 +3,7 @@ package http
 import (
 	"bytes"
 	"context"
+	"crypto/tls"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -35,6 +36,7 @@ type ClientOption func(*clientOptions)
 // Client is an HTTP transport client.
 type clientOptions struct {
 	ctx          context.Context
+	tlsConf      *tls.Config
 	timeout      time.Duration
 	endpoint     string
 	userAgent    string
@@ -127,6 +129,13 @@ func WithBlock() ClientOption {
 	}
 }
 
+// WithTLSConfig with tls config.
+func WithTLSConfig(c *tls.Config) ClientOption {
+	return func(o *clientOptions) {
+		o.tlsConf = c
+	}
+}
+
 // Client is an HTTP client.
 type Client struct {
 	opts   clientOptions
@@ -149,7 +158,16 @@ func NewClient(ctx context.Context, opts ...ClientOption) (*Client, error) {
 	for _, o := range opts {
 		o(&options)
 	}
-	target, err := parseTarget(options.endpoint)
+	if options.tlsConf != nil {
+		if tr, ok := options.transport.(*http.Transport); ok {
+			tr.TLSClientConfig = options.tlsConf
+		}
+	}
+	var isSecure bool
+	if options.tlsConf != nil {
+		isSecure = true
+	}
+	target, err := parseTarget(options.endpoint, isSecure)
 	if err != nil {
 		return nil, err
 	}
@@ -285,7 +303,10 @@ func (client *Client) do(ctx context.Context, req *http.Request, c callInfo) (*h
 
 // Close tears down the Transport and all underlying connections.
 func (client *Client) Close() error {
-	return client.r.Close()
+	if client.r != nil {
+		return client.r.Close()
+	}
+	return nil
 }
 
 // DefaultRequestEncoder is an HTTP request encoder.

transport/http/resolver.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"errors"
 	"net/url"
+	"strconv"
+	"strings"
 	"sync"
 	"time"
 
@@ -23,12 +25,17 @@ type Target struct {
 	Endpoint  string
 }
 
-func parseTarget(endpoint string) (*Target, error) {
+func parseTarget(endpoint string, isSecure bool) (*Target, error) {
+	if !strings.Contains(endpoint, "://") {
+		if isSecure {
+			endpoint = "https://" + endpoint
+		} else {
+			endpoint = "http://" + endpoint
+		}
+	}
 	u, err := url.Parse(endpoint)
 	if err != nil {
-		if u, err = url.Parse("http://" + endpoint); err != nil {
+		return nil, err
-			return nil, err
-		}
 	}
 	target := &Target{Scheme: u.Scheme, Authority: u.Host}
 	if len(u.Path) > 1 {
@@ -139,7 +146,12 @@ func parseEndpoint(endpoints []string) (string, string, error) {
 			return "", "", err
 		}
 		if u.Scheme == "http" {
-			return u.Scheme, u.Host, nil
+			isSecure, _ := strconv.ParseBool(u.Query().Get("isSecure"))
+			scheme := "http"
+			if isSecure {
+				scheme = "https"
+			}
+			return scheme, u.Host, nil
 		}
 	}
 	return "", "", nil

transport/http/resolver_test.go

@@ -0,0 +1,29 @@
+package http
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestParseTarget(t *testing.T) {
+	target, err := parseTarget("localhost:8000", false)
+	assert.Nil(t, err)
+	assert.Equal(t, &Target{Scheme: "http", Authority: "localhost:8000"}, target)
+
+	target, err = parseTarget("discovery:///demo", false)
+	assert.Nil(t, err)
+	assert.Equal(t, &Target{Scheme: "discovery", Authority: "", Endpoint: "demo"}, target)
+
+	target, err = parseTarget("127.0.0.1:8000", false)
+	assert.Nil(t, err)
+	assert.Equal(t, &Target{Scheme: "http", Authority: "127.0.0.1:8000"}, target)
+
+	target, err = parseTarget("https://127.0.0.1:8000", false)
+	assert.Nil(t, err)
+	assert.Equal(t, &Target{Scheme: "https", Authority: "127.0.0.1:8000"}, target)
+
+	target, err = parseTarget("127.0.0.1:8000", true)
+	assert.Nil(t, err)
+	assert.Equal(t, &Target{Scheme: "https", Authority: "127.0.0.1:8000"}, target)
+}

transport/http/server.go

@@ -2,6 +2,7 @@ package http
 
 import (
 	"context"
+	"crypto/tls"
 	"errors"
 	"net"
 	"net/http"
@@ -93,10 +94,18 @@ func Endpoint(endpoint *url.URL) ServerOption {
 	}
 }
 
+// TLSConfig with TLS config.
+func TLSConfig(c *tls.Config) ServerOption {
+	return func(o *Server) {
+		o.tlsConf = c
+	}
+}
+
 // Server is an HTTP server wrapper.
 type Server struct {
 	*http.Server
 	lis      net.Listener
+	tlsConf  *tls.Config
 	once     sync.Once
 	endpoint *url.URL
 	err      error
@@ -127,7 +136,8 @@ func NewServer(opts ...ServerOption) *Server {
 		o(srv)
 	}
 	srv.Server = &http.Server{
-		Handler: FilterChain(srv.filters...)(srv),
+		Handler:   FilterChain(srv.filters...)(srv),
+		TLSConfig: srv.tlsConf,
 	}
 	srv.router = mux.NewRouter()
 	srv.router.Use(srv.filter())
@@ -207,7 +217,11 @@ func (s *Server) Endpoint() (*url.URL, error) {
 			return
 		}
 		s.lis = lis
-		s.endpoint = &url.URL{Scheme: "http", Host: addr}
+		var query string
+		if s.tlsConf != nil {
+			query = "isSecure=true"
+		}
+		s.endpoint = &url.URL{Scheme: "http", Host: addr, RawQuery: query}
 	})
 	if s.err != nil {
 		return nil, s.err
@@ -224,7 +238,13 @@ func (s *Server) Start(ctx context.Context) error {
 		return ctx
 	}
 	s.log.Infof("[HTTP] server listening on: %s", s.lis.Addr().String())
-	if err := s.Serve(s.lis); !errors.Is(err, http.ErrServerClosed) {
+	var err error
+	if s.tlsConf != nil {
+		err = s.ServeTLS(s.lis, "", "")
+	} else {
+		err = s.Serve(s.lis)
+	}
+	if !errors.Is(err, http.ErrServerClosed) {
 		return err
 	}
 	return nil