为什么JWT过期太快

Question

我将JWT设置为3小时过期，但过期时间过早（不到2分钟）

string _keys = JWT.Key;
var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_keys));
var credentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256);
double _minutes = Security.Minute_JWT_Expiry;

var token = new JwtSecurityToken(JWT.Issuer, JWT.Key,
  null,
  expires: DateTime.UtcNow.AddMinutes(180),
  signingCredentials: credentials);

return await Task.FromResult(new JwtSecurityTokenHandler().WriteToken(token));

Answer 1

只想分享： 之所以出现此问题，是因为我将值与DateTime.Now ..进行了比较。

  if (expires.HasValue)
      return expires.Value > DateTime.UtcNow;

完成：

  var key = Encoding.ASCII.GetBytes(JWT.Key);
            services.AddAuthentication(x =>
            {
                x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            })
            .AddJwtBearer(x =>
            {
                x.RequireHttpsMetadata = false;
                x.SaveToken = true;
                x.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(key),
                    ValidateIssuer = true,
                    ValidateAudience = false,
                    ValidIssuer = JWT.Issuer,
                    LifetimeValidator =
                    (before, expires, token, parameters) =>
                    {
                       if (before.HasValue && before.Value > DateTime.Now)
                            return false;

                        if (expires.HasValue)
                            return expires.Value > DateTime.UtcNow;

                        //Otherwise the token is valid
                        return true;
                    },
                    ValidateLifetime = true,
                };
            });