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// Copyright (c) The go-grpc-middleware Authors.
// Licensed under the Apache License 2.0.
package auth_test
import (
"context"
"log"
"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/auth"
"github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/logging"
"github.com/grpc-ecosystem/go-grpc-middleware/v2/testing/testpb"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
var tokenInfoKey struct{}
func parseToken(token string) (struct{}, error) {
return struct{}{}, nil
}
func userClaimFromToken(struct{}) string {
return "foobar"
}
// exampleAuthFunc is used by a middleware to authenticate requests
func exampleAuthFunc(ctx context.Context) (context.Context, error) {
token, err := auth.AuthFromMD(ctx, "bearer")
if err != nil {
return nil, err
}
tokenInfo, err := parseToken(token)
if err != nil {
return nil, status.Errorf(codes.Unauthenticated, "invalid auth token: %v", err)
}
ctx = logging.InjectFields(ctx, logging.Fields{"auth.sub", userClaimFromToken(tokenInfo)})
// WARNING: In production define your own type to avoid context collisions.
return context.WithValue(ctx, tokenInfoKey, tokenInfo), nil
}
// Simple example of server initialization code.
func Example_serverConfig() {
_ = grpc.NewServer(
grpc.StreamInterceptor(auth.StreamServerInterceptor(exampleAuthFunc)),
grpc.UnaryInterceptor(auth.UnaryServerInterceptor(exampleAuthFunc)),
)
}
type gRPCServerAuthenticated struct {
testpb.UnimplementedTestServiceServer
}
// Ping only can be called by client when authenticated by exampleAuthFunc.
func (s *gRPCServerAuthenticated) Ping(_ context.Context, ping *testpb.PingRequest) (*testpb.PingResponse, error) {
return &testpb.PingResponse{Value: ping.Value, Counter: 0}, nil
}
type gRPCServerUnauthenticated struct {
testpb.UnimplementedTestServiceServer
}
// Ping can be called by client without being authenticated by exampleAuthFunc as AuthFuncOverride is called instead.
func (s *gRPCServerUnauthenticated) Ping(_ context.Context, _ *testpb.PingRequest) (*testpb.PingResponse, error) {
return nil, status.Error(codes.Unauthenticated, "no access")
}
// AuthFuncOverride is called instead of exampleAuthFunc.
func (s *gRPCServerUnauthenticated) AuthFuncOverride(ctx context.Context, fullMethodName string) (context.Context, error) {
log.Println("client is calling method:", fullMethodName)
return ctx, nil
}
// Simple example of server initialization code with AuthFuncOverride method.
func Example_serverConfigWithAuthOverride() {
server := grpc.NewServer(
grpc.StreamInterceptor(auth.StreamServerInterceptor(exampleAuthFunc)),
grpc.UnaryInterceptor(auth.UnaryServerInterceptor(exampleAuthFunc)),
)
overrideActive := true
if overrideActive {
testpb.RegisterTestServiceServer(server, &gRPCServerUnauthenticated{})
} else {
testpb.RegisterTestServiceServer(server, &gRPCServerAuthenticated{})
}
}
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