使用DOT Net Core MVC中使用JWT的简单身份验证

Question

我正在尝试在DOT Net Core应用程序中添加JWT验证。我遵循此链接以了解JWT，并能够通过像这样的一些值来生成令牌。

var token = new JwtSecurityToken(
  issuer: issuer,
  audience: aud,
  claims: claims,
  expires: expTime,
  signingCredentials: creds
);

编辑：，要遵循此答案，我还添加了JwtBearerAuthentication middleware in my app by adding app.UseJwtBearerAuthentication(new JwtBearerOptions { /* options */ }) to Startup.Configure() method。

现在我被卡住了，我该如何在HTTP标题内传递这个令牌？我正在登录时生成这个令牌，但是接下来是什么？我怎么能知道添加了JWT并正常工作？

任何类型的帮助都将不胜感激。

Answer 1

这是ASP.NET Core中的承载令牌身份验证的可运行样本。
如何在ASP.NET Core

中实现携带者令牌身份验证和授权

在后端，您可以按照此代码生成令牌：

[Route("api/[controller]")]
public class TokenAuthController : Controller
{
    [HttpPost]
    public string GetAuthToken(User user)
    {
        var existUser = UserStorage.Users.FirstOrDefault(u => u.Username == user.Username && u.Password == user.Password);
        if (existUser != null)
        {
            var requestAt = DateTime.Now;
            var expiresIn = requestAt + TokenAuthOption.ExpiresSpan;
            var token = GenerateToken(existUser, expiresIn);
            return JsonConvert.SerializeObject(new {
                stateCode = 1,
                requertAt = requestAt,
                expiresIn = TokenAuthOption.ExpiresSpan.TotalSeconds,
                accessToken = token
            });
        }
        else
        {
            return JsonConvert.SerializeObject(new { stateCode = -1, errors = "Username or password is invalid" });
        }
    }
    private string GenerateToken(User user, DateTime expires)
    {
        var handler = new JwtSecurityTokenHandler();
        ClaimsIdentity identity = new ClaimsIdentity(
            new GenericIdentity(user.Username, "TokenAuth"),
            new[] {
                new Claim("ID", user.ID.ToString())
            }
        );
        var securityToken = handler.CreateToken(new SecurityTokenDescriptor
        {
            Issuer = TokenAuthOption.Issuer,
            Audience = TokenAuthOption.Audience,
            SigningCredentials = TokenAuthOption.SigningCredentials,
            Subject = identity,
            Expires = expires
        });
        return handler.WriteToken(securityToken);
    }
}

在startup.cs/configureservices方法

services.AddAuthorization(auth =>
{
    auth.AddPolicy("Bearer", new AuthorizationPolicyBuilder()
        .AddAuthenticationSchemes(JwtBearerDefaults.AuthenticationScheme‌​)
        .RequireAuthenticatedUser().Build());
});

并在配置方法中添加此代码

app.UseJwtBearerAuthentication(new JwtBearerOptions {
    TokenValidationParameters = new TokenValidationParameters {
        IssuerSigningKey = TokenAuthOption.Key,
        ValidAudience = TokenAuthOption.Audience,
        ValidIssuer = TokenAuthOption.Issuer,
        ValidateIssuerSigningKey = true,
        ValidateLifetime = true,
        ClockSkew = TimeSpan.FromMinutes(0)
    }
});

在前端，您只需将令牌添加到标题中：

$.ajaxSetup({
    headers: { "Authorization": "Bearer " + accessToken }
});

或

$.ajax("http://somedomain/somepath/somepage",{
    headers:{ "Authorization": "Bearer " + accessToken },
    /*some else parameter for ajax, see more you can review the Jquery API*/
});