根据Matt
Dekrey的出色回答，我创建了一个完全有效的基于令牌的身份验证示例，它针对ASP.NET
Core（1.0.1）。你可以找到完整的代码在这个仓库在GitHub上（替代分支1.0.0-RC1，beta8，β7的），但在短暂的，重要的步骤是：

为您的应用生成密钥

在我的示例中，每次应用启动时，我都会生成一个随机密钥，您需要生成一个并将其存储在某个位置，然后将其提供给您的应用。有关如何生成随机密钥以及如何从.json文件导入它的信息，请参见此文件。正如@kspearrin在评论中所建议的那样，Data
Protection API似乎是“正确”管理密钥的理想候选者，但是我还没有解决这个问题。如果解决了，请提交拉取请求！

Startup.cs-ConfigureServices

在这里，我们需要为签名的令牌加载一个私钥，当令牌出现时，我们还将用它来验证令牌。我们将密钥存储在类级别的变量中key，该变量将在下面的Configure方法中重复使用。TokenAuthOptions是一个简单的类，其中包含我们在TokenController中创建我们的密钥所需的签名身份，受众和发行者。

// Replace this with some sort of loading from config / file.
RSAParameters keyParams = RSAKeyUtils.GetRandomKey();

// Create the key, and a set of token options to record signing credentials 
// using that key, along with the other parameters we will need in the 
// token controlller.
key = new RsaSecurityKey(keyParams);
tokenOptions = new TokenAuthOptions()
{
    Audience = TokenAudience,
    Issuer = TokenIssuer,
    SigningCredentials = new SigningCredentials(key, SecurityAlgorithms.Sha256Digest)
};

// Save the token options into an instance so they're accessible to the 
// controller.
services.AddSingleton<TokenAuthOptions>(tokenOptions);

// Enable the use of an [Authorize("Bearer")] attribute on methods and
// classes to protect.
services.AddAuthorization(auth =>
{
    auth.AddPolicy("Bearer", new AuthorizationPolicyBuilder()
        .AddAuthenticationSchemes(JwtBearerDefaults.AuthenticationScheme‌​)
        .RequireAuthenticatedUser().Build());
});

我们还设置了授权策略，以允许我们[Authorize("Bearer")]在希望保护的端点和类上使用。

Startup.cs-配置

在这里，我们需要配置JwtBearerAuthentication：

app.UseJwtBearerAuthentication(new JwtBearerOptions {
    TokenValidationParameters = new TokenValidationParameters {
        IssuerSigningKey = key,
        ValidAudience = tokenOptions.Audience,
        ValidIssuer = tokenOptions.Issuer,

        // When receiving a token, check that it is still valid.
        ValidateLifetime = true,

        // This defines the maximum allowable clock skew - i.e.
        // provides a tolerance on the token expiry time 
        // when validating the lifetime. As we're creating the tokens 
        // locally and validating them on the same machines which 
        // should have synchronised time, this can be set to zero. 
        // Where external tokens are used, some leeway here could be 
        // useful.
        ClockSkew = TimeSpan.FromMinutes(0)
    }
});

令牌控制器

在令牌控制器中，您需要一种方法来使用Startup.cs中加载的密钥生成签名密钥。我们已经在Startup中注册了TokenAuthOptions实例，因此我们需要将其注入TokenController的构造函数中：

[Route("api/[controller]")]
public class TokenController : Controller
{
    private readonly TokenAuthOptions tokenOptions;

    public TokenController(TokenAuthOptions tokenOptions)
    {
        this.tokenOptions = tokenOptions;
    }
...

然后，您需要在处理程序中为登录端点生成令牌，在我的示例中，我使用用户名和密码，并使用if语句验证用户名和密码，但是您需要做的关键是创建或加载声明身份并为此生成令牌：

public class AuthRequest
{
    public string username { get; set; }
    public string password { get; set; }
}

/// <summary>
/// Request a new token for a given username/password pair.
/// </summary>
/// <param name="req"></param>
/// <returns></returns>
[HttpPost]
public dynamic Post([FromBody] AuthRequest req)
{
    // Obviously, at this point you need to validate the username and password against whatever system you wish.
    if ((req.username == "TEST" && req.password == "TEST") || (req.username == "TEST2" && req.password == "TEST"))
    {
        DateTime? expires = DateTime.UtcNow.AddMinutes(2);
        var token = GetToken(req.username, expires);
        return new { authenticated = true, entityId = 1, token = token, tokenExpires = expires };
    }
    return new { authenticated = false };
}

private string GetToken(string user, DateTime? expires)
{
    var handler = new JwtSecurityTokenHandler();

    // Here, you should create or look up an identity for the user which is being authenticated.
    // For now, just creating a simple generic identity.
    ClaimsIdentity identity = new ClaimsIdentity(new GenericIdentity(user, "TokenAuth"), new[] { new Claim("EntityID", "1", ClaimValueTypes.Integer) });

    var securityToken = handler.CreateToken(new Microsoft.IdentityModel.Tokens.SecurityTokenDescriptor() {
        Issuer = tokenOptions.Issuer,
        Audience = tokenOptions.Audience,
        SigningCredentials = tokenOptions.SigningCredentials,
        Subject = identity,
        Expires = expires
    });
    return handler.WriteToken(securityToken);
}

就是这样。只需将其添加[Authorize("Bearer")]到要保护的任何方法或类中，如果在没有令牌的情况下尝试访问它，将会收到错误消息。如果要返回401错误而不是500错误，则需要注册一个自定义异常处理程序，如我在此处的示例所示。