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creds.go
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creds.go
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//
// Copyright The Athenz Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package sds
import (
"context"
"errors"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/peer"
"net"
)
type grpcCredentials struct{}
func NewCredentials() credentials.TransportCredentials {
return &grpcCredentials{}
}
func AthenzGrpcServerName() string {
return "athenz-sia-sds"
}
func (creds *grpcCredentials) ClientHandshake(_ context.Context, _ string, conn net.Conn) (net.Conn, credentials.AuthInfo, error) {
conn.Close()
return conn, ClientInfo{}, errors.New("client handshake not expected")
}
func (creds *grpcCredentials) ServerHandshake(conn net.Conn) (net.Conn, credentials.AuthInfo, error) {
udsConn, ok := conn.(*UdsConn)
if !ok {
udsConn.Close()
return conn, ClientInfo{}, errors.New("connection type is not uds")
}
return udsConn, udsConn.ClientInfo, nil
}
func (creds *grpcCredentials) Info() credentials.ProtocolInfo {
return credentials.ProtocolInfo{
SecurityProtocol: ClientAuthType(),
ServerName: AthenzGrpcServerName(),
}
}
func (creds *grpcCredentials) Clone() credentials.TransportCredentials {
clone := *creds
return &clone
}
func (creds *grpcCredentials) OverrideServerName(_ string) error {
return nil
}
func ClientInfoFromContext(ctx context.Context) ClientInfo {
peer, ok := peer.FromContext(ctx)
if !ok {
return ClientInfo{}
}
clientInfo, ok := peer.AuthInfo.(ClientInfo)
if !ok {
return ClientInfo{}
}
return clientInfo
}