go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/auth_service/impl/servers/internals/server.go (about)

     1  // Copyright 2021 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // Package internals contains Internals server implementation.
    16  package internals
    17  
    18  import (
    19  	"context"
    20  
    21  	"google.golang.org/grpc/codes"
    22  	"google.golang.org/grpc/status"
    23  
    24  	"go.chromium.org/luci/common/retry/transient"
    25  	"go.chromium.org/luci/server/auth/xsrf"
    26  
    27  	"go.chromium.org/luci/auth_service/api/internalspb"
    28  )
    29  
    30  // Server implements Internals server.
    31  type Server struct {
    32  	internalspb.UnimplementedInternalsServer
    33  }
    34  
    35  // RefreshXSRFToken implements the corresponding RPC method.
    36  func (*Server) RefreshXSRFToken(ctx context.Context, req *internalspb.RefreshXSRFTokenRequest) (*internalspb.XSRFToken, error) {
    37  	switch err := xsrf.Check(ctx, req.XsrfToken); {
    38  	case transient.Tag.In(err):
    39  		return nil, status.Errorf(codes.Internal, "transient error when checking the XSRF token: %s", err)
    40  	case err != nil:
    41  		return nil, status.Errorf(codes.PermissionDenied, "bad XSRF token: %s", err)
    42  	}
    43  
    44  	refreshed, err := xsrf.Token(ctx)
    45  	if err != nil {
    46  		return nil, status.Errorf(codes.Internal, "failed to generate new XSRF token: %s", err)
    47  	}
    48  
    49  	return &internalspb.XSRFToken{XsrfToken: refreshed}, nil
    50  }