WS-Federation为什么需要Microsoft.AspNetCore.DataProtection.Abstractions NuGet包？

Question

我一直在学习如何使WS-Federation在没有身份的情况下工作，并且在初始设置中，我使用了本指南：https://docs.microsoft.com/en-us/aspnet/core/security/authentication/ws-federation?view=aspnetcore-3.0

[在最长的时间内，我一直遇到错误，但是偶然地，我找到了解决方案，其中包括Microsoft.AspNetCore.DataProtection.Abstractions NuGet软件包。

在指南的任何地方都没有提到，我发现只有一篇文章提到了与WS-Federation相关的文章：https://github.com/dotnet/aspnetcore/issues/18639

此NuGet软件包的作用是什么，为什么要使WS-Federation工作需要它？这甚至是设置它的正确方法吗？

Answer 1

您可以找到源代码on github here

有效地，它提供了接口IDataProtector和IDataProtectionProvider。

namespace Microsoft.AspNetCore.DataProtection
{
    /// <summary>
    /// An interface that can provide data protection services.
    /// </summary>
    public interface IDataProtector : IDataProtectionProvider
    {
        /// <summary>
        /// Cryptographically protects a piece of plaintext data.
        /// </summary>
        /// <param name="plaintext">The plaintext data to protect.</param>
        /// <returns>The protected form of the plaintext data.</returns>
        byte[] Protect(byte[] plaintext);

        /// <summary>
        /// Cryptographically unprotects a piece of protected data.
        /// </summary>
        /// <param name="protectedData">The protected data to unprotect.</param>
        /// <returns>The plaintext form of the protected data.</returns>
        /// <exception cref="System.Security.Cryptography.CryptographicException">
        /// Thrown if the protected data is invalid or malformed.
        /// </exception>
        byte[] Unprotect(byte[] protectedData);
    }
}

namespace Microsoft.AspNetCore.DataProtection
{
    /// <summary>
    /// An interface that can be used to create <see cref="IDataProtector"/> instances.
    /// </summary>
    public interface IDataProtectionProvider
    {
        /// <summary>
        /// Creates an <see cref="IDataProtector"/> given a purpose.
        /// </summary>
        /// <param name="purpose">
        /// The purpose to be assigned to the newly-created <see cref="IDataProtector"/>.
        /// </param>
        /// <returns>An IDataProtector tied to the provided purpose.</returns>
        /// <remarks>
        /// The <paramref name="purpose"/> parameter must be unique for the intended use case; two
        /// different <see cref="IDataProtector"/> instances created with two different <paramref name="purpose"/>
        /// values will not be able to decipher each other's payloads. The <paramref name="purpose"/> parameter
        /// value is not intended to be kept secret.
        /// </remarks>
        IDataProtector CreateProtector(string purpose);
    }
}

它们都是WS-Federation正在实现（一个或另一个或两者）或正在使用的某种实现的抽象（从某种DI容器或构造函数中期望它）。无论如何，没有它，您将无法使它正常工作。

设置此方法的方法是还安装nuget软件包from here