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/*
*
* Copyright 2021 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 google
import (
"context"
"net"
"testing"
"google.golang.org/grpc/credentials"
icredentials "google.golang.org/grpc/internal/credentials"
"google.golang.org/grpc/internal/grpctest"
"google.golang.org/grpc/internal/xds"
"google.golang.org/grpc/resolver"
)
type s struct {
grpctest.Tester
}
func Test(t *testing.T) {
grpctest.RunSubTests(t, s{})
}
type testCreds struct {
credentials.TransportCredentials
typ string
}
func (c *testCreds) ClientHandshake(ctx context.Context, authority string, rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
return nil, &testAuthInfo{typ: c.typ}, nil
}
func (c *testCreds) ServerHandshake(conn net.Conn) (net.Conn, credentials.AuthInfo, error) {
return nil, &testAuthInfo{typ: c.typ}, nil
}
type testAuthInfo struct {
typ string
}
func (t *testAuthInfo) AuthType() string {
return t.typ
}
var (
testTLS = &testCreds{typ: "tls"}
testALTS = &testCreds{typ: "alts"}
)
func overrideNewCredsFuncs() func() {
origNewTLS := newTLS
newTLS = func() credentials.TransportCredentials {
return testTLS
}
origNewALTS := newALTS
newALTS = func() credentials.TransportCredentials {
return testALTS
}
origNewADC := newADC
newADC = func(context.Context) (credentials.PerRPCCredentials, error) {
// We do not use perRPC creds in this test. It is safe to return nil here.
return nil, nil
}
return func() {
newTLS = origNewTLS
newALTS = origNewALTS
newADC = origNewADC
}
}
// TestClientHandshakeBasedOnClusterName that by default (without switching
// modes), ClientHandshake does either tls or alts base on the cluster name in
// attributes.
func (s) TestClientHandshakeBasedOnClusterName(t *testing.T) {
defer overrideNewCredsFuncs()()
for bundleTyp, tc := range map[string]credentials.Bundle{
"defaultCredsWithOptions": NewDefaultCredentialsWithOptions(DefaultCredentialsOptions{}),
"defaultCreds": NewDefaultCredentials(),
"computeCreds": NewComputeEngineCredentials(),
} {
tests := []struct {
name string
ctx context.Context
wantTyp string
}{
{
name: "no cluster name",
ctx: context.Background(),
wantTyp: "tls",
},
{
name: "with non-CFE cluster name",
ctx: icredentials.NewClientHandshakeInfoContext(context.Background(), credentials.ClientHandshakeInfo{
Attributes: xds.SetXDSHandshakeClusterName(resolver.Address{}, "lalala").Attributes,
}),
// non-CFE backends should use alts.
wantTyp: "alts",
},
{
name: "with CFE cluster name",
ctx: icredentials.NewClientHandshakeInfoContext(context.Background(), credentials.ClientHandshakeInfo{
Attributes: xds.SetXDSHandshakeClusterName(resolver.Address{}, "google_cfe_bigtable.googleapis.com").Attributes,
}),
// CFE should use tls.
wantTyp: "tls",
},
{
name: "with xdstp CFE cluster name",
ctx: icredentials.NewClientHandshakeInfoContext(context.Background(), credentials.ClientHandshakeInfo{
Attributes: xds.SetXDSHandshakeClusterName(resolver.Address{}, "xdstp://traffic-director-c2p.xds.googleapis.com/envoy.config.cluster.v3.Cluster/google_cfe_bigtable.googleapis.com").Attributes,
}),
// CFE should use tls.
wantTyp: "tls",
},
{
name: "with xdstp non-CFE cluster name",
ctx: icredentials.NewClientHandshakeInfoContext(context.Background(), credentials.ClientHandshakeInfo{
Attributes: xds.SetXDSHandshakeClusterName(resolver.Address{}, "xdstp://other.com/envoy.config.cluster.v3.Cluster/google_cfe_bigtable.googleapis.com").Attributes,
}),
// non-CFE should use atls.
wantTyp: "alts",
},
}
for _, tt := range tests {
t.Run(bundleTyp+" "+tt.name, func(t *testing.T) {
_, info, err := tc.TransportCredentials().ClientHandshake(tt.ctx, "", nil)
if err != nil {
t.Fatalf("ClientHandshake failed: %v", err)
}
if gotType := info.AuthType(); gotType != tt.wantTyp {
t.Fatalf("unexpected authtype: %v, want: %v", gotType, tt.wantTyp)
}
_, infoServer, err := tc.TransportCredentials().ServerHandshake(nil)
if err != nil {
t.Fatalf("ClientHandshake failed: %v", err)
}
// ServerHandshake should always do TLS.
if gotType := infoServer.AuthType(); gotType != "tls" {
t.Fatalf("unexpected server authtype: %v, want: %v", gotType, "tls")
}
})
}
}
}
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