/// <summary>
/// Creates an <see cref="IDataProtectionProvider"/> given an <see cref="IServiceProvider"/>.
/// </summary>
/// <param name="options">The global options to use when creating the provider.</param>
/// <param name="services">Provides mandatory services for use by the provider.</param>
/// <returns>An <see cref="IDataProtectionProvider"/>.</returns>
public static IDataProtectionProvider GetProviderFromServices(DataProtectionOptions options, IServiceProvider services)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
return(GetProviderFromServices(options, services, mustCreateImmediately: false));
}
/// <summary>
/// Creates an <see cref="IDataProtectionProvider"/> given an <see cref="IServiceProvider"/>.
/// </summary>
/// <param name="options">The global options to use when creating the provider.</param>
/// <param name="services">Provides mandatory services for use by the provider.</param>
/// <returns>An <see cref="IDataProtectionProvider"/>.</returns>
public static IDataProtectionProvider GetProviderFromServices(DataProtectionOptions options, IServiceProvider services)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
return GetProviderFromServices(options, services, mustCreateImmediately: false);
}
internal static IDataProtectionProvider GetProviderFromServices(DataProtectionOptions options, IServiceProvider services, bool mustCreateImmediately)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
IDataProtectionProvider dataProtectionProvider = null;
// If we're being asked to create the provider immediately, then it means that
// we're already in a call to GetService, and we're responsible for supplying
// the default implementation ourselves. We can't call GetService again or
// else we risk stack diving.
if (!mustCreateImmediately)
{
dataProtectionProvider = services.GetService <IDataProtectionProvider>();
}
// If all else fails, create a keyring manually based on the other registered services.
if (dataProtectionProvider == null)
{
var keyRingProvider = new KeyRingProvider(
keyManager: services.GetRequiredService <IKeyManager>(),
keyManagementOptions: services.GetService <IOptions <KeyManagementOptions> >()?.Value, // might be null
services: services);
dataProtectionProvider = new KeyRingBasedDataProtectionProvider(keyRingProvider, services);
}
// Finally, link the provider to the supplied discriminator
if (!String.IsNullOrEmpty(options.ApplicationDiscriminator))
{
dataProtectionProvider = dataProtectionProvider.CreateProtector(options.ApplicationDiscriminator);
}
return(dataProtectionProvider);
}
internal static IDataProtectionProvider GetProviderFromServices(DataProtectionOptions options, IServiceProvider services, bool mustCreateImmediately)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
IDataProtectionProvider dataProtectionProvider = null;
// If we're being asked to create the provider immediately, then it means that
// we're already in a call to GetService, and we're responsible for supplying
// the default implementation ourselves. We can't call GetService again or
// else we risk stack diving.
if (!mustCreateImmediately)
{
dataProtectionProvider = services.GetService<IDataProtectionProvider>();
}
// If all else fails, create a keyring manually based on the other registered services.
if (dataProtectionProvider == null)
{
var keyRingProvider = new KeyRingProvider(
keyManager: services.GetRequiredService<IKeyManager>(),
keyManagementOptions: services.GetService<IOptions<KeyManagementOptions>>()?.Value, // might be null
services: services);
dataProtectionProvider = new KeyRingBasedDataProtectionProvider(keyRingProvider, services);
}
// Finally, link the provider to the supplied discriminator
if (!String.IsNullOrEmpty(options.ApplicationDiscriminator))
{
dataProtectionProvider = dataProtectionProvider.CreateProtector(options.ApplicationDiscriminator);
}
return dataProtectionProvider;
}
