public void CloudQueueMessageEncryptionWithStrictMode()
{
// Create the Key to be used for wrapping.
SymmetricKey aesKey = new SymmetricKey("symencryptionkey");
// Create the resolver to be used for unwrapping.
DictionaryKeyResolver resolver = new DictionaryKeyResolver();
resolver.Add(aesKey);
CloudQueueClient client = GenerateCloudQueueClient();
string name = GenerateNewQueueName();
CloudQueue queue = client.GetQueueReference(name);
try
{
queue.CreateIfNotExists();
string messageStr = Guid.NewGuid().ToString();
CloudQueueMessage message = new CloudQueueMessage(messageStr);
QueueEncryptionPolicy policy = new QueueEncryptionPolicy(aesKey, null);
// Add message with policy.
QueueRequestOptions createOptions = new QueueRequestOptions()
{
EncryptionPolicy = policy
};
createOptions.RequireEncryption = true;
queue.AddMessage(message, null, null, createOptions, null);
// Set policy to null and add message while RequireEncryption flag is still set to true. This should throw.
createOptions.EncryptionPolicy = null;
TestHelper.ExpectedException <InvalidOperationException>(
() => queue.AddMessage(message, null, null, createOptions, null),
"Not specifying a policy when RequireEnryption is set to true should throw.");
// Retrieve message
QueueEncryptionPolicy retrPolicy = new QueueEncryptionPolicy(null, resolver);
QueueRequestOptions retrieveOptions = new QueueRequestOptions()
{
EncryptionPolicy = retrPolicy
};
retrieveOptions.RequireEncryption = true;
CloudQueueMessage retrMessage = queue.GetMessage(null, retrieveOptions, null);
// Update message with plain text.
string updatedMessage = Guid.NewGuid().ToString("N");
retrMessage.SetMessageContent(updatedMessage);
queue.UpdateMessage(retrMessage, TimeSpan.FromSeconds(0), MessageUpdateFields.Content | MessageUpdateFields.Visibility);
// Retrieve updated message with RequireEncryption flag but no metadata on the service. This should throw.
TestHelper.ExpectedException <StorageException>(
() => queue.GetMessage(null, retrieveOptions, null),
"Retrieving with RequireEncryption set to true and no metadata on the service should fail.");
// Set RequireEncryption to false and retrieve.
retrieveOptions.RequireEncryption = false;
queue.GetMessage(null, retrieveOptions, null);
}
finally
{
queue.DeleteIfExists();
}
}