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 17 package com.google.crypto.tink.testing; 18 19 import com.google.crypto.tink.prf.Prf; 20 import com.google.crypto.tink.prf.PrfSet; 21 import com.google.crypto.tink.testing.proto.CreationRequest; 22 import com.google.crypto.tink.testing.proto.CreationResponse; 23 import com.google.crypto.tink.testing.proto.PrfSetComputeRequest; 24 import com.google.crypto.tink.testing.proto.PrfSetComputeResponse; 25 import com.google.crypto.tink.testing.proto.PrfSetGrpc.PrfSetImplBase; 26 import com.google.crypto.tink.testing.proto.PrfSetKeyIdsRequest; 27 import com.google.crypto.tink.testing.proto.PrfSetKeyIdsResponse; 28 import com.google.protobuf.ByteString; 29 import io.grpc.stub.StreamObserver; 30 import java.security.GeneralSecurityException; 31 import java.util.Map; 32 33 /** Implements a gRPC Aead Testing service. */ 34 public final class PrfSetServiceImpl extends PrfSetImplBase { 35 PrfSetServiceImpl()36 public PrfSetServiceImpl() throws GeneralSecurityException { 37 } 38 39 @Override create(CreationRequest request, StreamObserver<CreationResponse> responseObserver)40 public void create(CreationRequest request, StreamObserver<CreationResponse> responseObserver) { 41 Util.createPrimitiveForRpc(request, responseObserver, PrfSet.class); 42 } 43 keyIds( PrfSetKeyIdsRequest request)44 private PrfSetKeyIdsResponse keyIds( 45 PrfSetKeyIdsRequest request) throws GeneralSecurityException { 46 try { 47 PrfSet prfSet = 48 Util.parseBinaryProtoKeyset(request.getAnnotatedKeyset()) 49 .getPrimitive(PrfSet.class); 50 PrfSetKeyIdsResponse.Output output = PrfSetKeyIdsResponse.Output.newBuilder() 51 .setPrimaryKeyId(prfSet.getPrimaryId()) 52 .addAllKeyId(prfSet.getPrfs().keySet()) 53 .build(); 54 return PrfSetKeyIdsResponse.newBuilder().setOutput(output).build(); 55 } catch (GeneralSecurityException e) { 56 return PrfSetKeyIdsResponse.newBuilder().setErr(e.toString()).build(); 57 } 58 } 59 60 @Override keyIds( PrfSetKeyIdsRequest request, StreamObserver<PrfSetKeyIdsResponse> responseObserver)61 public void keyIds( 62 PrfSetKeyIdsRequest request, 63 StreamObserver<PrfSetKeyIdsResponse> responseObserver) { 64 try { 65 responseObserver.onNext(keyIds(request)); 66 responseObserver.onCompleted(); 67 } catch (GeneralSecurityException e) { 68 responseObserver.onError(e); 69 } 70 } 71 72 /** Computes the output of one PRF. */ compute(PrfSetComputeRequest request)73 private PrfSetComputeResponse compute(PrfSetComputeRequest request) 74 throws GeneralSecurityException { 75 try { 76 PrfSet prfSet = 77 Util.parseBinaryProtoKeyset(request.getAnnotatedKeyset()) 78 .getPrimitive(PrfSet.class); 79 Map<Integer, Prf> prfs = prfSet.getPrfs(); 80 if (!prfs.containsKey(request.getKeyId())) { 81 return PrfSetComputeResponse.newBuilder().setErr("Unknown Key ID.").build(); 82 } else { 83 byte[] output = 84 prfs.get(request.getKeyId()) 85 .compute(request.getInputData().toByteArray(), request.getOutputLength()); 86 return 87 PrfSetComputeResponse.newBuilder().setOutput(ByteString.copyFrom(output)).build(); 88 } 89 } catch (GeneralSecurityException e) { 90 return PrfSetComputeResponse.newBuilder().setErr(e.toString()).build(); 91 } 92 } 93 94 @Override compute( PrfSetComputeRequest request, StreamObserver<PrfSetComputeResponse> responseObserver)95 public void compute( 96 PrfSetComputeRequest request, 97 StreamObserver<PrfSetComputeResponse> responseObserver) { 98 try { 99 responseObserver.onNext(compute(request)); 100 responseObserver.onCompleted(); 101 } catch (GeneralSecurityException e) { 102 responseObserver.onError(e); 103 } 104 } 105 } 106