无法使用 ASP.NET Core 从 JWT 令牌获取声明

问题描述

我正在尝试使用 ASP.NET Core 实现一个非常简单的 JWT 不记名身份验证.我从控制器返回的响应有点像这样:

I'm trying to do a really simple implementation of JWT bearer authentication with ASP.NET Core. I return a response from a controller a bit like this:

    var identity = new ClaimsIdentity();
    identity.AddClaim(new Claim(ClaimTypes.Name, applicationUser.UserName));
        var jwt = new JwtSecurityToken(
             _jwtOptions.Issuer,
             _jwtOptions.Audience,
             identity.Claims,
             _jwtOptions.NotBefore,
             _jwtOptions.Expiration,
             _jwtOptions.SigningCredentials);

       var encodedJwt = new JwtSecurityTokenHandler().WriteToken(jwt);

       return new JObject(
           new JProperty("access_token", encodedJwt),
           new JProperty("token_type", "bearer"),
           new JProperty("expires_in", (int)_jwtOptions.ValidFor.TotalSeconds),
           new JProperty(".issued", DateTimeOffset.UtcNow.ToString())
       );

我有用于传入请求的 Jwt 中间件:

I have Jwt middleware for incoming requests:

app.UseJwtBearerAuthentication(new JwtBearerOptions
{
     AutomaticAuthenticate = true,
     AutomaticChallenge = true,
     TokenValidationParameters = tokenValidationParameters
});

这似乎可以使用 authorize 属性保护资源，但声明从未出现.

This seems to work to protect resources with the authorize attribute, but the claims never show up.

    [Authorize]
    public async Task<IActionResult> Get()
    {
        var user = ClaimsPrincipal.Current.Claims; // Nothing here

推荐答案

您不能在 ASP.NET Core 应用程序中使用 ClaimsPricipal.Current，因为它不是由运行时设置的.您可以阅读 https://github.com/aspnet/Security/issues/322 了解更多信息.

You can't use ClaimsPricipal.Current in an ASP.NET Core application, as it's not set by the runtime. You can read https://github.com/aspnet/Security/issues/322 for more information.

相反，请考虑使用 ControllerBase 公开的 User 属性.

Instead, consider using the User property, exposed by ControllerBase.

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