public static object ParseRequest(byte[] request)
{
if (request.Length < 1)
{
Console.Error.WriteLine("Received request with no bytes");
return(new Common.InvalidRequest());
}
if (request[0] == 1)
{
return(Common.GetQuoteRequest.ParseRequest(request));
}
if (request[0] == 2)
{
return(InitializeDBRequest.ParseRequest(request));
}
if (request[0] == 3)
{
return(AddRowRequest.ParseRequest(request));
}
if (request[0] == 4)
{
return(QueryRequest.ParseRequest(request));
}
Console.Error.WriteLine("Received request with invalid type");
return(new Common.InvalidRequest());
}
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());
}
