JWT签名与验签

签名Token生产

using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;

namespace CoreTest.Controllers
{
    public class TokenController : Controller
    {
        private ITokenHelper _tokenHelper = null;

        public TokenController(ITokenHelper tokenHelper)
        {
            _tokenHelper = tokenHelper;
        }

        public IActionResult Index(string code, string pwd)
        {
            User user = TemporaryData.GetUser(code);
            if (null != user && user.Password.Equals(pwd))
            {
                return Ok(_tokenHelper.CreateToken(user));
            }
            return BadRequest();
        }

        [HttpPost]
        [Authorize]
        public IActionResult Index()
        {
            return Ok(_tokenHelper.RefreshToken(Request.HttpContext.User));
        }

    }

    public interface ITokenHelper
    {
        Token CreateAccessToken(User user);
        ComplexToken CreateToken(User user);
        ComplexToken CreateToken(Claim[] claims);
        Token RefreshToken(ClaimsPrincipal claimsPrincipal);
    }

    public class TokenHelper : ITokenHelper
    {
        private IOptions<JWTConfig> _options;
        public TokenHelper(IOptions<JWTConfig> options)
        {
            _options = options;
        }

        public Token CreateAccessToken(User user)
        {
            Claim[] claims = new Claim[] { new Claim(ClaimTypes.NameIdentifier, user.Code), new Claim(ClaimTypes.Name, user.Name) };

            return CreateToken(claims, TokenType.AccessToken);
        }

        public ComplexToken CreateToken(User user)
        {
            Claim[] claims = new Claim[] { new Claim(ClaimTypes.NameIdentifier, user.Code), new Claim(ClaimTypes.Name, user.Name)
            //下面两个Claim用于测试在Token中存储用户的角色信息，对应测试在FlyLolo.JWT.API的两个测试Controller的Put方法，若用不到可删除
            , new Claim(ClaimTypes.Role, "TestPutBookRole"), new Claim(ClaimTypes.Role, "TestPutStudentRole")
        };

            return CreateToken(claims);
        }

        public ComplexToken CreateToken(Claim[] claims)
        {
            return new ComplexToken { AccessToken = CreateToken(claims, TokenType.AccessToken), RefreshToken = CreateToken(claims, TokenType.RefreshToken) };
        }

        /// <summary>
        /// 用于创建AccessToken和RefreshToken。
        /// 这里AccessToken和RefreshToken只是过期时间不同，【实际项目】中二者的claims内容可能会不同。
        /// 因为RefreshToken只是用于刷新AccessToken，其内容可以简单一些。
        /// 而AccessToken可能会附加一些其他的Claim。
        /// </summary>
        /// <param name="claims"></param>
        /// <param name="tokenType"></param>
        /// <returns></returns>
        private Token CreateToken(Claim[] claims, TokenType tokenType)
        {
            var now = DateTime.Now;
            var expires = now.Add(TimeSpan.FromMinutes(tokenType.Equals(TokenType.AccessToken) ? _options.Value.AccessTokenExpiresMinutes : _options.Value.RefreshTokenExpiresMinutes));//设置不同的过期时间
            var token = new JwtSecurityToken(
                issuer: _options.Value.Issuer,
                audience: tokenType.Equals(TokenType.AccessToken) ? _options.Value.Audience : _options.Value.RefreshTokenAudience,//设置不同的接受者
                claims: claims,
                notBefore: now,
                expires: expires,
                signingCredentials: new SigningCredentials(new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_options.Value.IssuerSigningKey)), SecurityAlgorithms.HmacSha256));
            return new Token { TokenContent = new JwtSecurityTokenHandler().WriteToken(token), Expires = expires };
        }

        public Token RefreshToken(ClaimsPrincipal claimsPrincipal)
        {
            var code = claimsPrincipal.Claims.FirstOrDefault(m => m.Type.Equals(ClaimTypes.NameIdentifier));
            if (null != code)
            {
                return CreateAccessToken(TemporaryData.GetUser(code.Value.ToString()));
            }
            else
            {
                return null;
            }
        }
    }

    public class User
    {
        public string Code { get; set; }
        public string Name { get; set; }
        public string Password { get; set; }
    }

    public class Token
    {
        public string TokenContent { get; set; }

        public DateTime Expires { get; set; }
    }

    public enum TokenType
    {
        AccessToken = ,
        RefreshToken =
    }

    public class ComplexToken
    {
        public Token AccessToken { get; set; }
        public Token RefreshToken { get; set; }
    }

    public class JWTConfig
    {
        public string Issuer { get; set; }
        public string Audience { get; set; }
        public string IssuerSigningKey { get; set; }
        public int AccessTokenExpiresMinutes { get; set; }
        public string RefreshTokenAudience { get; set; }
        public int RefreshTokenExpiresMinutes { get; set; }
    }

public static class TemporaryData
    {
        private static List<User> Users = new List<User>()
        {
            new User { Code = "", Name = "张三", Password = "" },
            new User { Code = "", Name = "李四", Password = "" }
        };

        public static User GetUser(string code)
        {
            return Users.FirstOrDefault(m => m.Code.Equals(code));
        }
    }
}

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AllowedHosts": "*",

  "JWT": {
    "Issuer": "FlyLolo",
    "Audience": "TestAudience",
    "IssuerSigningKey": "FlyLolo1234567890",
    "AccessTokenExpiresMinutes": "",
    "RefreshTokenAudience": "RefreshTokenAudience",
    "RefreshTokenExpiresMinutes": ""
  }
}

Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using CoreTest.Controllers;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;

namespace CoreTest
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<Controllers.UserInfo>(Configuration.GetSection("User"));
            services.AddSingleton<ITokenHelper, TokenHelper>();
            services.Configure<JWTConfig>(Configuration.GetSection("JWT"));
            JWTConfig config = new JWTConfig();
            Configuration.GetSection("JWT").Bind(config);

            services.AddAuthentication(options => {
                options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            })
            .AddJwtBearer(options => {
                options.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidIssuer = config.Issuer,
                    ValidAudience = config.RefreshTokenAudience,
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(config.IssuerSigningKey))
                };
            });

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseHttpsRedirection();

            app.UseAuthentication();
            app.UseMvc(route =>
            {
                route.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}"
                    );
            });
        }
    }
}

Token验证

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace ClientTest.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    [Authorize]
    public class BookController : ControllerBase
    {
        // GET: api/<controller>
        [HttpGet]
        [AllowAnonymous]
        public IEnumerable<string> Get()
        {
            return new string[] { "ASP", "C#" };
        }

        // POST api/<controller>
        [HttpPost]
        public JsonResult Post()
        {
            return new JsonResult("Create  Book ...");
        }
    }

    public class JWTConfig
    {
    public string Issuer { get; set; }
    public string Audience { get; set; }
    public string IssuerSigningKey { get; set; }
    public int AccessTokenExpiresMinutes { get; set; }
}
}

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AllowedHosts": "*",
  "JWT": {
    "Issuer": "FlyLolo",
    "Audience": "TestAudience",
    "IssuerSigningKey": "FlyLolo1234567890",
    "AccessTokenExpiresMinutes": ""
  }
}

Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ClientTest.Controllers;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;

namespace ClientTest
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            #region 读取配置
            JWTConfig config = new JWTConfig();
            Configuration.GetSection("JWT").Bind(config);
            #endregion

            #region 启用JWT认证
            services.AddAuthentication(options =>
            {
                options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            }).
            AddJwtBearer(options =>
            {
                options.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidIssuer = config.Issuer,
                    ValidAudience = config.Audience,
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(config.IssuerSigningKey)),
                    ClockSkew = TimeSpan.FromMinutes()
                };
            });
            #endregion

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseAuthentication();
            app.UseMvc();
        }
    }
}