public byte[] HandleRequest(byte[] requestBytes) { object request = DiffPrivRequest.ParseRequest(requestBytes); if (request is Common.GetQuoteRequest) { GetQuoteResponse getQuoteResponse = new GetQuoteResponse(0, key_pair); return(getQuoteResponse.Encode()); } if (request is InitializeDBRequest) { InitializeDBRequest r = (InitializeDBRequest)request; if (rows_received != 0) { Console.Error.WriteLine("Received request to initialize DB after receiving rows"); return(DiffPrivSrvResponse.EncodeInitializeDBResponse(18)); } if (r.budget_num < r.budget_den) { Console.Error.WriteLine("Received request to initialize DB with budget < 1"); return(DiffPrivSrvResponse.EncodeInitializeDBResponse(16)); } budget = new BigRational(r.budget_num, r.budget_den); rows.Clear(); return(DiffPrivSrvResponse.EncodeInitializeDBResponse(0)); } if (request is AddRowRequest) { byte[] ciphertext = ((AddRowRequest)request).ciphertext; byte[] plaintext; try { plaintext = key_pair.Decrypt(ciphertext, false); } catch { Console.Error.WriteLine("Received undecryptable add-row request"); return(DiffPrivSrvResponse.EncodeAddRowResponse()); } HandleAddRowRequest(plaintext); return(DiffPrivSrvResponse.EncodeAddRowResponse()); } if (request is QueryRequest) { QueryRequest r = (QueryRequest)request; return(HandleQueryRequest(r)); } return(InvalidResponse.Encode()); }
public byte[] HandleRequest(byte[] requestBytes) { object request = NotaryRequest.ParseRequest(requestBytes); if (request is Common.GetQuoteRequest) { GetQuoteResponse getQuoteResponse = new GetQuoteResponse(0, key_pair); return(getQuoteResponse.Encode()); } if (request is AdvanceCounterRequest) { AdvanceCounterRequest r = (AdvanceCounterRequest)request; counter = counter + 1; byte[] header = new byte[1]; header[0] = 34; byte[] new_counter_value_encoding = CommonRoutines.EncodeMPBigInteger(counter); byte[] notary_statement = CommonRoutines.CombineByteArrays(header, new_counter_value_encoding, r.message); byte[] notary_attestation = key_pair.SignData(notary_statement, CryptoConfig.MapNameToOID("SHA256")); return(NotarySrvResponse.EncodeAdvanceCounterResponse(0, notary_statement, notary_attestation)); } return(InvalidResponse.Encode()); }
public byte[] HandleRequest(byte[] requestBytes) { object request = TrIncRequest.ParseRequest(requestBytes); if (request is Common.GetQuoteRequest) { GetQuoteResponse getQuoteResponse = new GetQuoteResponse(0, key_pair); return(getQuoteResponse.Encode()); } if (request is CreateCounterRequest) { CreateCounterRequest r = (CreateCounterRequest)request; RSACryptoServiceProvider public_key = CommonRoutines.DecodePublicKey(r.public_key); if (public_key == null) { return(TrIncSrvResponse.EncodeCreateCounterResponse(3, 0)); } TrIncCounter counter = new TrIncCounter(public_key); counters.Add(counter); UInt32 counter_index = (UInt32)(counters.Count - 1); return(TrIncSrvResponse.EncodeCreateCounterResponse(0, counter_index)); } if (request is AdvanceCounterRequest) { AdvanceCounterRequest r = (AdvanceCounterRequest)request; if (r.counter_index < 0 || r.counter_index >= counters.Count) { Console.Error.WriteLine("Received request for invalid counter index {0}", r.counter_index); return(TrIncSrvResponse.EncodeAdvanceCounterResponse(1, new byte[0], new byte[0])); } TrIncCounter counter = counters[(int)r.counter_index]; byte[] req = CommonRoutines.CombineByteArrays(r.new_counter_value, r.message); if (!counter.PublicKey.VerifyData(req, CryptoConfig.MapNameToOID("SHA256"), r.request_attestation)) { Console.Error.WriteLine("Received invalid request attestation"); return(TrIncSrvResponse.EncodeAdvanceCounterResponse(5, new byte[0], new byte[0])); } int offset = 0; BigInteger new_counter_value = CommonRoutines.DecodeMPBigInteger(r.new_counter_value, ref offset); if (new_counter_value < 0 || offset != r.new_counter_value.Length) { Console.Error.WriteLine("Received invalid new counter value encoding"); return(TrIncSrvResponse.EncodeAdvanceCounterResponse(6, new byte[0], new byte[0])); } if (new_counter_value < counter.Value) { Console.Error.WriteLine("New counter value requested {0} is smaller than current counter value {1}", new_counter_value, counter.Value); return(TrIncSrvResponse.EncodeAdvanceCounterResponse(7, new byte[0], new byte[0])); } BigInteger old_counter_value = counter.Value; counter.Value = new_counter_value; byte[] header = new byte[1]; header[0] = 34; byte[] counter_index_encoding = CommonRoutines.EncodeBEWord(r.counter_index); byte[] old_counter_value_encoding = CommonRoutines.EncodeMPBigInteger(old_counter_value); byte[] new_counter_value_encoding = CommonRoutines.EncodeMPBigInteger(new_counter_value); byte[] trinc_statement = CommonRoutines.CombineByteArrays(header, counter_index_encoding, old_counter_value_encoding, new_counter_value_encoding, r.message); byte[] trinc_attestation = key_pair.SignData(trinc_statement, CryptoConfig.MapNameToOID("SHA256")); return(TrIncSrvResponse.EncodeAdvanceCounterResponse(0, trinc_statement, trinc_attestation)); } return(InvalidResponse.Encode()); }