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package grpccredentials_test
import (
"context"
"net"
"sync"
"testing"
"github.com/spiffe/go-spiffe/v2/internal/test"
"github.com/spiffe/go-spiffe/v2/spiffegrpc/grpccredentials"
"github.com/spiffe/go-spiffe/v2/spiffeid"
"github.com/spiffe/go-spiffe/v2/spiffetls/tlsconfig"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/examples/helloworld/helloworld"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/status"
)
func TestCredentials(t *testing.T) {
webRoots, webCert := test.CreateWebCredentials(t)
td := spiffeid.RequireTrustDomainFromString("domain.test")
ca := test.NewCA(t, td)
bundle := ca.Bundle()
serverSVID := ca.CreateX509SVID(spiffeid.RequireFromPath(td, "/server"))
clientSVID := ca.CreateX509SVID(spiffeid.RequireFromPath(td, "/client"))
serverID := serverSVID.ID.String()
clientID := clientSVID.ID.String()
serverMTLS := grpccredentials.MTLSServerCredentials(serverSVID, bundle, tlsconfig.AuthorizeAny())
clientMTLS := grpccredentials.MTLSClientCredentials(clientSVID, bundle, tlsconfig.AuthorizeAny())
serverTLS := grpccredentials.TLSServerCredentials(serverSVID)
clientTLS := grpccredentials.TLSClientCredentials(bundle, tlsconfig.AuthorizeAny())
serverWeb := grpccredentials.MTLSWebServerCredentials(webCert, bundle, tlsconfig.AuthorizeAny())
clientWeb := grpccredentials.MTLSWebClientCredentials(clientSVID, webRoots)
t.Run("mTLS to mTLS", func(t *testing.T) {
// Handshake will succeed.
testCredentials(t, clientMTLS, serverMTLS, expectResult{
Code: codes.OK,
ServerID: serverID,
ClientID: clientID,
})
})
t.Run("TLS to mTLS", func(t *testing.T) {
// Handshake will fail since server requires client SVID
testCredentials(t, clientTLS, serverMTLS, expectResult{
Code: codes.Unavailable,
})
})
t.Run("Web to mTLS", func(t *testing.T) {
// Handshake will fail because client is doing hostname validation
// against a server SVID
testCredentials(t, clientWeb, serverMTLS, expectResult{
Code: codes.Unavailable,
MessageContains: `cannot validate certificate for 127.0.0.1 because it doesn't contain any IP SANs`,
})
})
t.Run("mTLS to TLS", func(t *testing.T) {
// Handshake will succeed, but the server won't pick up (or validate)
// the client SVID.
testCredentials(t, clientMTLS, serverTLS, expectResult{
Code: codes.OK,
ServerID: serverID,
ClientID: "",
})
})
t.Run("TLS to TLS", func(t *testing.T) {
// Handshake will succeed, but the server won't pick up (or validate)
// the client SVID.
testCredentials(t, clientTLS, serverTLS, expectResult{
Code: codes.OK,
ServerID: serverID,
ClientID: "",
})
})
t.Run("Web to TLS", func(t *testing.T) {
// Handshake will fail because client is doing hostname validation
// against a server SVID
testCredentials(t, clientWeb, serverTLS, expectResult{
Code: codes.Unavailable,
MessageContains: `cannot validate certificate for 127.0.0.1 because it doesn't contain any IP SANs`,
})
})
t.Run("mTLS to Web", func(t *testing.T) {
// Handshake will fail because client expects server SVID
testCredentials(t, clientMTLS, serverWeb, expectResult{
Code: codes.Unavailable,
MessageContains: `certificate contains no URI SAN`,
})
})
t.Run("TLS to Web", func(t *testing.T) {
// Handshake will fail because client expects server SVID
testCredentials(t, clientTLS, serverWeb, expectResult{
Code: codes.Unavailable,
MessageContains: `could not get leaf SPIFFE ID: certificate contains no URI SAN`,
})
})
t.Run("Web to Web", func(t *testing.T) {
// Handshake will succeed, but the server won't pick up (or validate)
// the client SVID.
testCredentials(t, clientWeb, serverWeb, expectResult{
Code: codes.OK,
ServerID: "", // No server SVID for web server
ClientID: clientID,
})
})
}
type expectResult struct {
Code codes.Code
MessageContains string
ClientID string
ServerID string
}
func testCredentials(t *testing.T, clientCreds, serverCreds credentials.TransportCredentials, expect expectResult) {
var wg sync.WaitGroup
defer wg.Wait()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
listener, err := net.Listen("tcp", "127.0.0.1:0")
require.NoError(t, err)
defer listener.Close()
server := grpc.NewServer(grpc.Creds(serverCreds))
defer server.Stop()
helloworld.RegisterGreeterServer(server, greeterServer{})
wg.Add(1)
go func() {
defer wg.Done()
_ = server.Serve(listener)
}()
conn, err := grpc.NewClient(listener.Addr().String(), grpc.WithTransportCredentials(clientCreds))
require.NoError(t, err)
defer conn.Close()
clientPeer := new(peer.Peer)
var clientID string
resp, err := helloworld.NewGreeterClient(conn).SayHello(ctx, &helloworld.HelloRequest{}, grpc.Peer(clientPeer))
if err == nil {
clientID = resp.Message
}
st := status.Convert(err)
serverID, serverIDOK := grpccredentials.PeerIDFromPeer(clientPeer)
assert.Equal(t, expect.ServerID != "", serverIDOK)
assert.Equal(t, expect.Code, st.Code())
assert.Contains(t, st.Message(), expect.MessageContains)
assert.Equal(t, expect.ClientID, clientID)
assert.Equal(t, expect.ServerID, serverID.String())
}
type greeterServer struct {
helloworld.UnimplementedGreeterServer
}
func (s greeterServer) SayHello(ctx context.Context, in *helloworld.HelloRequest) (*helloworld.HelloReply, error) {
peerID, _ := grpccredentials.PeerIDFromContext(ctx)
return &helloworld.HelloReply{Message: peerID.String()}, nil
}
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