如何加密msmq消息？

Question

For my internship i'm making an application which sends messages using MSMQ. Everything works fine currently except the encryption. (Private data)

The application sends a list of a custom object to the server, and retrieves it from the server. But when I use: message.UseEncryption = true; the unittest won't run.

My code:

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Messaging;
using System.Text;
using System.Threading.Tasks;

namespace MSMQClient
{
    public class ClientManager
    {
        public bool connected { get; private set; }
        public string queueLocation { get; private set; }

        public Message message { get; private set; }
        public MessageQueue messageQueue { get; private set; }
        public List<DataContracts.MemoryTransaction> notSentTransactions { get; private set; }

        public ClientManager()
        {
            queueLocation = @".\private$\testqueue";

            if (MessageQueue.Exists(queueLocation))
            {
                MessageQueue.Delete(queueLocation);
            }

            messageQueue = MessageQueue.Create(queueLocation);
            //messageQueue.EncryptionRequired = EncryptionRequired.Body;
        }

        public bool isConnected()
        {
            if (messageQueue != null)
            {
                return true;
            }
            return false;
        }

        public bool sendToServer(List<DataContracts.MemoryTransaction> memoryTransactions)
        {
            try
            {
                message = new Message();

                message.Formatter = new XmlMessageFormatter(new Type[] { typeof(List<DataContracts.MemoryTransaction>) });

                //message.UseEncryption = true;

                message.Body = memoryTransactions;
                message.Label = "MemoryTransList";
                message.Priority = MessagePriority.Normal;

                messageQueue.Send(message);
                return true;
            }
            catch (Exception ex)
            {
                Cocosoft.SDK.Logging.TextLogging(ex.ToString());

                notSentTransactions = memoryTransactions;

                return false;
            }
        }
    }

I found this site and tried a lot, but I can't get it working... I think I have to use the next things:

public bool sendToServer(List<DataContracts.MemoryTransaction> memoryTransactions)
{
    try
    {
        message = new Message();
        message.Body = ... //memoryTransactions
        message.Label = ... //"MemoryTransList"
        message.Priority = ... //Priority.Normal
        message.Formatter = ... //new XmlMessageFormatter(new Type[] { typeof(List<DataContracts.MemoryTransaction>) });
        message.UseEncryption = ... //true
        message.ConnectorType = ... //???
        message.EncryptionAlgorithm = ... //EncryptionAlgorithm.Rc2
        message.DestinationSymmetricKey = ...//???

        messageQueue.Send(message);
        return true;
    }
    catch (Exception ex)
    {
        notSentTransactions = memoryTransactions;
        return false;
    }
}

Who can help me? Am I missing something?

But the Cocosoft SDK saves this in a logging.txt:

Translation: The specified format name does not support the requested operation. For example, a direct queue format name cannot be deleted.

System.Messaging.MessageQueueException (0x80004005): De opgegeven indelingsnaam ondersteunt de gevraagde bewerking niet. Een directe wachtrij-indelingsnaam kan bijvoorbeeld niet worden verwijderd.
   bij System.Messaging.MessageQueue.SendInternal(Object obj, MessageQueueTransaction internalTransaction, MessageQueueTransactionType transactionType)
   bij System.Messaging.MessageQueue.Send(Object obj)
   bij MSMQClient.ClientManager.sendToServer(List`1 memoryTransactions) in d:\StageGeert\UnitTestStage\MSMQClient\ClientManager.cs:regel 96

Answer 1

I found a solution! I was using a local version of MSMQ. But I had to implement in in Azure, so I used Azure Service Bus. This was a bit different then local message queuing. But thanks to the Azure Service Bus, the problem is solved! Good Job Microsoft!

Answer 2

If you set up message.UseEncryption = true; the Privacy Level of a target queue must be "Body" or "Optional". If privacy level of a target queue is "None" - it will reject encrypted messages. https://msdn.microsoft.com/ru-ru/library/ms700286(v=vs.85).aspx

Answer 3

There is a checkbox in the computer management console for MSMQ that sets a message storage limit. Perhaps the encryption is forcing the messages to exceed this storage limit. Can you try to uncheck the storage limits checkboxes to see if that allows you to properly send the messages?