jwt-在asp.net core中的使用jwt

public class Const  {      public const string SecurityKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDSfLGu+kcFDcJUCV46J+SbgR0lNc2NqgCGzojQTWW9xqjuzPF3mpisvTggYZSGfBzN+88YLZYbBLrDTUMJ4nTieElbP6SHkBFu8F+7fFBi7w3UPsaAXDr2E2srQYU5ZlKAcFBoNajNWj3sfSVRoYRPdqDTj4WdJlUPSNGz0wgRrQIDAQAB";      public const string Domain = "http://localhost:5000";  }

在Startup中向应用添加jwt验证服务：

//添加jwt验证：  services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)      .AddJwtBearer(options => {          options.TokenValidationParameters = new TokenValidationParameters          {              ValidateIssuer = true,//是否验证Issuer                          ValidateAudience = true,//是否验证Audience                          ValidateLifetime = true,//是否验证失效时间                          ClockSkew = TimeSpan.FromSeconds(30),              ValidateIssuerSigningKey = true,//是否验证SecurityKey                          ValidAudience = Const.Domain,//Audience                          ValidIssuer = Const.Domain,//Issuer，这两项和前面签发jwt的设置一致                          IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Const.SecurityKey))//拿到SecurityKey                      };      });

管道中添加jwt验证：

//添加jwt验证  app.UseAuthentication();

由于管道有执行顺序的特性，因此最好放在管道的开始位置。

添加登录获取token的接口：

[ApiController]  [Route("[controller]")]  public class AuthController : ControllerBase  {      [AllowAnonymous]//指定此属性应用于的类或方法不需要授权。      [HttpGet]      public IActionResult Get(string userName, string pwd)      {          if (!string.IsNullOrEmpty(userName) && !string.IsNullOrEmpty(pwd))          {              var claims = new[]              {                      new Claim(JwtRegisteredClaimNames.Nbf,$"{new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds()}") ,                      new Claim (JwtRegisteredClaimNames.Exp,$"{new DateTimeOffset(DateTime.Now.AddMinutes(30)).ToUnixTimeSeconds()}"),                      new Claim(ClaimTypes.Name, userName)                  };              var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Const.SecurityKey));              var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);              var token = new JwtSecurityToken(                  issuer: Const.Domain,                  audience: Const.Domain,                  claims: claims,                  expires: DateTime.Now.AddMinutes(30),                  signingCredentials: creds);                 return Ok(new              {                  token = new JwtSecurityTokenHandler().WriteToken(token)              });          }          else          {              return BadRequest(new { message = "username or password is incorrect." });          }      }  }

方法中对用户名和密码的验证只是简单的验空，实际应用中会更复杂，也会与数据库中的数据比对。

接下来就是对jwt的应用了。

新建HomeController，用于验证jwt是否成功启用：

[ApiController]  [Route("[controller]")]  public class HomeController : ControllerBase  {      [HttpGet]      [Route("api/value1")]      public ActionResult<IEnumerable<string>> Get()      {          return new string[] { "value1", "value1" };      }         [HttpGet]      [Route("api/value2")]      [Authorize]      public ActionResult<IEnumerable<string>> Get2()      {          return new string[] { "value2", "value2" };      }  }