mirror of
https://github.com/edgelesssys/constellation.git
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83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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// Package server implements an API to manage encryption keys.
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package server
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import (
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"context"
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"fmt"
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"log/slog"
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"net"
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"github.com/edgelesssys/constellation/v2/internal/crypto"
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"github.com/edgelesssys/constellation/v2/internal/grpc/grpclog"
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"github.com/edgelesssys/constellation/v2/internal/kms/kms"
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"github.com/edgelesssys/constellation/v2/internal/logger"
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"github.com/edgelesssys/constellation/v2/keyservice/keyserviceproto"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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// Server implements an encryption key management server.
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// The server serves aTLS for cluster external requests
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// and plain gRPC for cluster internal requests.
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type Server struct {
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log *slog.Logger
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conKMS kms.CloudKMS
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keyserviceproto.UnimplementedAPIServer
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}
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// New creates a new Server.
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func New(log *slog.Logger, conKMS kms.CloudKMS) *Server {
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return &Server{
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log: log,
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conKMS: conKMS,
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}
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}
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// Run starts the gRPC server.
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func (s *Server) Run(port string) error {
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// set up listener
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listener, err := net.Listen("tcp", net.JoinHostPort("", port))
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if err != nil {
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return fmt.Errorf("failed to listen on port %s: %v", port, err)
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}
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server := grpc.NewServer(logger.GetServerUnaryInterceptor(s.log.WithGroup("gRPC")))
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keyserviceproto.RegisterAPIServer(server, s)
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logger.ReplaceGRPCLogger(slog.New(logger.NewLevelHandler(slog.LevelWarn, s.log.Handler())).WithGroup("gRPC"))
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// start the server
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s.log.Info(fmt.Sprintf("Starting Constellation key management service on %s", listener.Addr().String()))
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return server.Serve(listener)
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}
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// GetDataKey returns a data key.
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func (s *Server) GetDataKey(ctx context.Context, in *keyserviceproto.GetDataKeyRequest) (*keyserviceproto.GetDataKeyResponse, error) {
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log := s.log.With("peerAddress", grpclog.PeerAddrFromContext(ctx))
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// Error on 0 key length
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if in.Length == 0 {
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log.Error("Requested key length is zero")
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return nil, status.Error(codes.InvalidArgument, "can't derive key with length zero")
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}
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// Error on empty DataKeyId
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if in.DataKeyId == "" {
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log.Error("No data key ID specified")
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return nil, status.Error(codes.InvalidArgument, "no data key ID specified")
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}
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key, err := s.conKMS.GetDEK(ctx, crypto.DEKPrefix+in.DataKeyId, int(in.Length))
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if err != nil {
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log.With(slog.Any("error", err)).Error("Failed to get data key")
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return nil, status.Errorf(codes.Internal, "%v", err)
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}
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return &keyserviceproto.GetDataKeyResponse{DataKey: key}, nil
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}
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