go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/appengine/gaeauth/server/service.go (about)

     1  // Copyright 2015 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 server
    16  
    17  import (
    18  	"context"
    19  
    20  	"go.chromium.org/luci/auth/identity"
    21  	"go.chromium.org/luci/server/auth"
    22  )
    23  
    24  // InboundAppIDAuthMethod implements auth.Method by checking special HTTP
    25  // header (X-Appengine-Inbound-Appid), that is set iff one GAE app talks to
    26  // another.
    27  //
    28  // Deprecated: switch to using service accounts for authenticating calls between
    29  // services instead.
    30  type InboundAppIDAuthMethod struct{}
    31  
    32  var _ auth.Method = InboundAppIDAuthMethod{}
    33  
    34  // Authenticate extracts peer's identity from the incoming request.
    35  func (m InboundAppIDAuthMethod) Authenticate(ctx context.Context, r auth.RequestMetadata) (*auth.User, auth.Session, error) {
    36  	appID := r.Header("X-Appengine-Inbound-Appid")
    37  	if appID == "" {
    38  		return nil, nil, nil
    39  	}
    40  	id, err := identity.MakeIdentity("service:" + appID)
    41  	if err != nil {
    42  		return nil, nil, err
    43  	}
    44  	return &auth.User{Identity: id}, nil, nil
    45  }