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/signature" 23 pb "github.com/google/tink/testing/go/protos/testing_api_go_grpc" 24) 25 26// SignatureService implements the Signature testing service. 27type SignatureService struct { 28 pb.SignatureServer 29} 30 31func (s *SignatureService) CreatePublicKeySign(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 = signature.NewSigner(handle) 37 if err != nil { 38 return &pb.CreationResponse{Err: err.Error()}, nil 39 } 40 return &pb.CreationResponse{}, nil 41} 42 43func (s *SignatureService) CreatePublicKeyVerify(ctx context.Context, req *pb.CreationRequest) (*pb.CreationResponse, error) { 44 handle, err := toKeysetHandle(req.GetAnnotatedKeyset()) 45 if err != nil { 46 return &pb.CreationResponse{Err: err.Error()}, nil 47 } 48 _, err = signature.NewVerifier(handle) 49 if err != nil { 50 return &pb.CreationResponse{Err: err.Error()}, nil 51 } 52 return &pb.CreationResponse{}, nil 53} 54 55func (s *SignatureService) Sign(ctx context.Context, req *pb.SignatureSignRequest) (*pb.SignatureSignResponse, error) { 56 handle, err := toKeysetHandle(req.GetPrivateAnnotatedKeyset()) 57 if err != nil { 58 return &pb.SignatureSignResponse{ 59 Result: &pb.SignatureSignResponse_Err{err.Error()}}, nil 60 } 61 signer, err := signature.NewSigner(handle) 62 if err != nil { 63 return &pb.SignatureSignResponse{ 64 Result: &pb.SignatureSignResponse_Err{err.Error()}}, nil 65 } 66 sigValue, err := signer.Sign(req.Data) 67 if err != nil { 68 return &pb.SignatureSignResponse{ 69 Result: &pb.SignatureSignResponse_Err{err.Error()}}, nil 70 } 71 return &pb.SignatureSignResponse{ 72 Result: &pb.SignatureSignResponse_Signature{sigValue}}, nil 73} 74 75func (s *SignatureService) Verify(ctx context.Context, req *pb.SignatureVerifyRequest) (*pb.SignatureVerifyResponse, error) { 76 handle, err := toKeysetHandle(req.GetPublicAnnotatedKeyset()) 77 if err != nil { 78 return &pb.SignatureVerifyResponse{Err: err.Error()}, nil 79 } 80 verifier, err := signature.NewVerifier(handle) 81 if err != nil { 82 return &pb.SignatureVerifyResponse{Err: err.Error()}, nil 83 } 84 err = verifier.Verify(req.Signature, req.Data) 85 if err != nil { 86 return &pb.SignatureVerifyResponse{Err: err.Error()}, nil 87 } 88 return &pb.SignatureVerifyResponse{}, nil 89} 90