c# - Data Protection Keys Not Persisted To Azure

Question

I have an ASP.NET Core application hosted in IIS in an Azure VM. I call the extension method to persist they key to Azure but nothing is ever stored there and the application seems to still be using local keys. I followed the example here: http://intellitect.com/staying-logged-across-azure-app-service-swap/ exactly. As a matter of fact, when I test the code in a console application, persistence works fine. However, when I run the ASP.NET Core app with this code, nothing ever gets persisted to Azure. Any ideas why?

Answer 1

Please check the order of registering MVC service and DataProtection service. Registering DataProtection service must be before registering MVC service. Code below is for your reference.

// Add DataProtection Service
if (storageUrl != null && sasToken != null && containerName != null && applicationName != null && blobName != null)
{
    // Create the new Storage URI
    Uri storageUri = new Uri($"{storageUrl}{sasToken}");

    //Create the blob client object.
    CloudBlobClient blobClient = new CloudBlobClient(storageUri);

    //Get a reference to a container to use for the sample code, and create it if it does not exist.
    CloudBlobContainer container = blobClient.GetContainerReference(containerName);
    container.CreateIfNotExists();

    services.AddDataProtection()
        .SetApplicationName(applicationName)
        .PersistKeysToAzureBlobStorage(container, blobName);
}

// Add framework services.
services.AddMvc();