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/*
*
* Copyright 2020 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package local
import (
"context"
"fmt"
"net"
"runtime"
"strings"
"testing"
"time"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/internal/grpctest"
)
const defaultTestTimeout = 10 * time.Second
type s struct {
grpctest.Tester
}
func Test(t *testing.T) {
grpctest.RunSubTests(t, s{})
}
func (s) TestGetSecurityLevel(t *testing.T) {
testCases := []struct {
testNetwork string
testAddr string
want credentials.SecurityLevel
}{
{
testNetwork: "tcp",
testAddr: "127.0.0.1:10000",
want: credentials.NoSecurity,
},
{
testNetwork: "tcp",
testAddr: "[::1]:10000",
want: credentials.NoSecurity,
},
{
testNetwork: "unix",
testAddr: "/tmp/grpc_fullstack_test",
want: credentials.PrivacyAndIntegrity,
},
{
testNetwork: "tcp",
testAddr: "192.168.0.1:10000",
want: credentials.InvalidSecurityLevel,
},
}
for _, tc := range testCases {
got, _ := getSecurityLevel(tc.testNetwork, tc.testAddr)
if got != tc.want {
t.Fatalf("GetSeurityLevel(%s, %s) returned %s but want %s", tc.testNetwork, tc.testAddr, got.String(), tc.want.String())
}
}
}
type serverHandshake func(net.Conn) (credentials.AuthInfo, error)
func getSecurityLevelFromAuthInfo(ai credentials.AuthInfo) credentials.SecurityLevel {
if c, ok := ai.(interface {
GetCommonAuthInfo() credentials.CommonAuthInfo
}); ok {
return c.GetCommonAuthInfo().SecurityLevel
}
return credentials.InvalidSecurityLevel
}
// Server local handshake implementation.
func serverLocalHandshake(conn net.Conn) (credentials.AuthInfo, error) {
cred := NewCredentials()
_, authInfo, err := cred.ServerHandshake(conn)
if err != nil {
return nil, err
}
return authInfo, nil
}
// Client local handshake implementation.
func clientLocalHandshake(conn net.Conn, lisAddr string) (credentials.AuthInfo, error) {
cred := NewCredentials()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
_, authInfo, err := cred.ClientHandshake(ctx, lisAddr, conn)
if err != nil {
return nil, err
}
return authInfo, nil
}
// Client connects to a server with local credentials.
func clientHandle(hs func(net.Conn, string) (credentials.AuthInfo, error), network, lisAddr string) (credentials.AuthInfo, error) {
conn, _ := net.Dial(network, lisAddr)
defer conn.Close()
clientAuthInfo, err := hs(conn, lisAddr)
if err != nil {
return nil, fmt.Errorf("Error on client while handshake")
}
return clientAuthInfo, nil
}
type testServerHandleResult struct {
authInfo credentials.AuthInfo
err error
}
// Server accepts a client's connection with local credentials.
func serverHandle(hs serverHandshake, done chan testServerHandleResult, lis net.Listener) {
serverRawConn, err := lis.Accept()
if err != nil {
done <- testServerHandleResult{authInfo: nil, err: fmt.Errorf("Server failed to accept connection. Error: %v", err)}
return
}
serverAuthInfo, err := hs(serverRawConn)
if err != nil {
serverRawConn.Close()
done <- testServerHandleResult{authInfo: nil, err: fmt.Errorf("Server failed while handshake. Error: %v", err)}
return
}
done <- testServerHandleResult{authInfo: serverAuthInfo, err: nil}
}
func serverAndClientHandshake(lis net.Listener) (credentials.SecurityLevel, error) {
done := make(chan testServerHandleResult, 1)
const timeout = 5 * time.Second
timer := time.NewTimer(timeout)
defer timer.Stop()
go serverHandle(serverLocalHandshake, done, lis)
defer lis.Close()
clientAuthInfo, err := clientHandle(clientLocalHandshake, lis.Addr().Network(), lis.Addr().String())
if err != nil {
return credentials.InvalidSecurityLevel, fmt.Errorf("Error at client-side: %v", err)
}
select {
case <-timer.C:
return credentials.InvalidSecurityLevel, fmt.Errorf("Test didn't finish in time")
case serverHandleResult := <-done:
if serverHandleResult.err != nil {
return credentials.InvalidSecurityLevel, fmt.Errorf("Error at server-side: %v", serverHandleResult.err)
}
clientSecLevel := getSecurityLevelFromAuthInfo(clientAuthInfo)
serverSecLevel := getSecurityLevelFromAuthInfo(serverHandleResult.authInfo)
if clientSecLevel == credentials.InvalidSecurityLevel {
return credentials.InvalidSecurityLevel, fmt.Errorf("Error at client-side: client's AuthInfo does not implement GetCommonAuthInfo()")
}
if serverSecLevel == credentials.InvalidSecurityLevel {
return credentials.InvalidSecurityLevel, fmt.Errorf("Error at server-side: server's AuthInfo does not implement GetCommonAuthInfo()")
}
if clientSecLevel != serverSecLevel {
return credentials.InvalidSecurityLevel, fmt.Errorf("client's AuthInfo contains %s but server's AuthInfo contains %s", clientSecLevel.String(), serverSecLevel.String())
}
return clientSecLevel, nil
}
}
func (s) TestServerAndClientHandshake(t *testing.T) {
testCases := []struct {
testNetwork string
testAddr string
want credentials.SecurityLevel
}{
{
testNetwork: "tcp",
testAddr: "127.0.0.1:0",
want: credentials.NoSecurity,
},
{
testNetwork: "tcp",
testAddr: "[::1]:0",
want: credentials.NoSecurity,
},
{
testNetwork: "tcp",
testAddr: "localhost:0",
want: credentials.NoSecurity,
},
{
testNetwork: "unix",
testAddr: fmt.Sprintf("/tmp/grpc_fullstck_test%d", time.Now().UnixNano()),
want: credentials.PrivacyAndIntegrity,
},
}
for _, tc := range testCases {
if runtime.GOOS == "windows" && tc.testNetwork == "unix" {
t.Skip("skipping tests for unix connections on Windows")
}
t.Run("serverAndClientHandshakeResult", func(t *testing.T) {
lis, err := net.Listen(tc.testNetwork, tc.testAddr)
if err != nil {
if strings.Contains(err.Error(), "bind: cannot assign requested address") ||
strings.Contains(err.Error(), "socket: address family not supported by protocol") {
t.Skipf("no support for address %v", tc.testAddr)
}
t.Fatalf("Failed to listen: %v", err)
}
got, err := serverAndClientHandshake(lis)
if got != tc.want {
t.Fatalf("serverAndClientHandshake(%s, %s) = %v, %v; want %v, nil", tc.testNetwork, tc.testAddr, got, err, tc.want)
}
})
}
}
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