1// Copyright 2020 Google LLC 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/////////////////////////////////////////////////////////////////////////////// 16 17package services 18 19import ( 20 "context" 21 22 "github.com/google/tink/go/prf" 23 pb "github.com/google/tink/testing/go/protos/testing_api_go_grpc" 24) 25 26// PrfSetService implements the PrfSet testing service. 27type PrfSetService struct { 28 pb.PrfSetServer 29} 30 31func (s *PrfSetService) Create(ctx context.Context, req *pb.CreationRequest) (*pb.CreationResponse, error) { 32 handle, err := toKeysetHandle(req.GetAnnotatedKeyset()) 33 if err != nil { 34 return &pb.CreationResponse{Err: err.Error()}, nil 35 } 36 _, err = prf.NewPRFSet(handle) 37 if err != nil { 38 return &pb.CreationResponse{Err: err.Error()}, nil 39 } 40 return &pb.CreationResponse{}, nil 41} 42 43func (s *PrfSetService) KeyIds(ctx context.Context, req *pb.PrfSetKeyIdsRequest) (*pb.PrfSetKeyIdsResponse, error) { 44 handle, err := toKeysetHandle(req.GetAnnotatedKeyset()) 45 if err != nil { 46 return &pb.PrfSetKeyIdsResponse{ 47 Result: &pb.PrfSetKeyIdsResponse_Err{err.Error()}}, nil 48 } 49 primitive, err := prf.NewPRFSet(handle) 50 if err != nil { 51 return &pb.PrfSetKeyIdsResponse{ 52 Result: &pb.PrfSetKeyIdsResponse_Err{err.Error()}}, nil 53 } 54 output := &pb.PrfSetKeyIdsResponse_Output{} 55 output.PrimaryKeyId = primitive.PrimaryID 56 for keyID := range primitive.PRFs { 57 output.KeyId = append(output.KeyId, keyID) 58 } 59 return &pb.PrfSetKeyIdsResponse{ 60 Result: &pb.PrfSetKeyIdsResponse_Output_{output}}, nil 61} 62 63func (s *PrfSetService) Compute(ctx context.Context, req *pb.PrfSetComputeRequest) (*pb.PrfSetComputeResponse, error) { 64 handle, err := toKeysetHandle(req.GetAnnotatedKeyset()) 65 if err != nil { 66 return &pb.PrfSetComputeResponse{ 67 Result: &pb.PrfSetComputeResponse_Err{err.Error()}}, nil 68 } 69 primitive, err := prf.NewPRFSet(handle) 70 if err != nil { 71 return &pb.PrfSetComputeResponse{ 72 Result: &pb.PrfSetComputeResponse_Err{err.Error()}}, nil 73 } 74 output, err := primitive.PRFs[req.KeyId].ComputePRF(req.InputData, uint32(req.OutputLength)) 75 if err != nil { 76 return &pb.PrfSetComputeResponse{ 77 Result: &pb.PrfSetComputeResponse_Err{err.Error()}}, nil 78 } 79 return &pb.PrfSetComputeResponse{ 80 Result: &pb.PrfSetComputeResponse_Output{output}}, nil 81} 82