// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Collections.Generic;
 
namespace Microsoft.AspNetCore.Identity;
 
/// <summary>
/// Abstraction used to manage named keys used to protect lookups.
/// </summary>
public interface ILookupProtectorKeyRing
{
    /// <summary>
    /// Get the current key id.
    /// </summary>
    string CurrentKeyId { get; }
 
    /// <summary>
    /// Return a specific key.
    /// </summary>
    /// <param name="keyId">The id of the key to fetch.</param>
    /// <returns>The key ring.</returns>
    string this[string keyId] { get; }
 
    /// <summary>
    /// Return all of the key ids.
    /// </summary>
    /// <returns>All of the key ids.</returns>
    IEnumerable<string> GetAllKeyIds();
}