mirror of
https://github.com/etcd-io/etcd.git
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84 lines
2.3 KiB
Go
84 lines
2.3 KiB
Go
// Copyright 2019 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package credentials implements gRPC credential interface with etcd specific logic.
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// e.g., client handshake with custom authority parameter
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package credentials
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import (
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"context"
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"crypto/tls"
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"sync"
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grpccredentials "google.golang.org/grpc/credentials"
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"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
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)
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func NewTransportCredential(cfg *tls.Config) grpccredentials.TransportCredentials {
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return grpccredentials.NewTLS(cfg)
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}
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// PerRPCCredentialsBundle defines gRPC credential interface.
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type PerRPCCredentialsBundle interface {
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UpdateAuthToken(token string)
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PerRPCCredentials() grpccredentials.PerRPCCredentials
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}
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func NewPerRPCCredentialBundle() PerRPCCredentialsBundle {
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return &perRPCCredentialBundle{
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rc: &perRPCCredential{},
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}
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}
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// perRPCCredentialBundle implements `PerRPCCredentialsBundle` interface.
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type perRPCCredentialBundle struct {
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rc *perRPCCredential
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}
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func (b *perRPCCredentialBundle) UpdateAuthToken(token string) {
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if b.rc == nil {
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return
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}
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b.rc.UpdateAuthToken(token)
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}
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func (b *perRPCCredentialBundle) PerRPCCredentials() grpccredentials.PerRPCCredentials {
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return b.rc
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}
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// perRPCCredential implements `grpccredentials.PerRPCCredentials` interface.
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type perRPCCredential struct {
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authToken string
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authTokenMu sync.RWMutex
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}
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func (rc *perRPCCredential) RequireTransportSecurity() bool { return false }
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func (rc *perRPCCredential) GetRequestMetadata(ctx context.Context, s ...string) (map[string]string, error) {
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rc.authTokenMu.RLock()
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authToken := rc.authToken
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rc.authTokenMu.RUnlock()
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if authToken == "" {
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return nil, nil
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}
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return map[string]string{rpctypes.TokenFieldNameGRPC: authToken}, nil
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}
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func (rc *perRPCCredential) UpdateAuthToken(token string) {
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rc.authTokenMu.Lock()
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rc.authToken = token
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rc.authTokenMu.Unlock()
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}
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