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C#

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using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.Linq;
using System.Security.Claims;
using System.Text;
using Admin.Core.Common;
using Microsoft.IdentityModel.Tokens;
namespace Admin.Core.Extensions
{
public class JwtHelper
{
/// <summary>
/// 颁发JWT字符串
/// </summary>
/// <param name="tokenModel"></param>
/// <returns></returns>
public static string IssueJwt(TokenModelJwt tokenModel)
{
string iss = Appsettings.app(new string[] { "Audience", "Issuer" });
string aud = Appsettings.app(new string[] { "Audience", "Audience" });
string secret = AppSecretConfig.Audience_Secret_String;
//var claims = new Claim[] //old
var claims = new List<Claim>
{
/*
* 特别重要:
1、这里将用户的部分信息比如 uid 存到了Claim 中,如果你想知道如何在其他地方将这个 uid从 Token 中取出来请看下边的SerializeJwt() 方法,或者在整个解决方案,搜索这个方法,看哪里使用了!
2、你也可以研究下 HttpContext.User.Claims ,具体的你可以看看 Policys/PermissionHandler.cs 类中是如何使用的。
*/
new Claim(JwtRegisteredClaimNames.Jti, tokenModel.Uid.ToString()),
new Claim(JwtRegisteredClaimNames.Iat, $"{new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds()}"),
new Claim(JwtRegisteredClaimNames.Nbf,$"{new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds()}") ,
//这个就是过期时间目前是过期1000秒可自定义注意JWT有自己的缓冲过期时间
new Claim (JwtRegisteredClaimNames.Exp,$"{new DateTimeOffset(DateTime.Now.AddSeconds(1000)).ToUnixTimeSeconds()}"),
new Claim(ClaimTypes.Expiration, DateTime.Now.AddSeconds(1000).ToString()),
new Claim(JwtRegisteredClaimNames.Iss,iss),
new Claim(JwtRegisteredClaimNames.Aud,aud),
//new Claim(ClaimTypes.Role,tokenModel.Role),//为了解决一个用户多个角色(比如Admin,System),用下边的方法
};
// 可以将一个用户的多个角色全部赋予;
// 作者DX 提供技术支持;
claims.AddRange(tokenModel.Role.Split(',').Select(s => new Claim(ClaimTypes.Role, s)));
//秘钥 (SymmetricSecurityKey 对安全性的要求,密钥的长度太短会报出异常)
var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secret));
var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
var jwt = new JwtSecurityToken(
issuer: iss,
claims: claims,
signingCredentials: creds);
var jwtHandler = new JwtSecurityTokenHandler();
var encodedJwt = jwtHandler.WriteToken(jwt);
return encodedJwt;
}
/// <summary>
/// 解析
/// </summary>
/// <param name="jwtStr"></param>
/// <returns></returns>
public static TokenModelJwt SerializeJwt(string jwtStr)
{
var jwtHandler = new JwtSecurityTokenHandler();
TokenModelJwt tokenModelJwt = new TokenModelJwt();
// token校验
if (jwtStr.IsNotEmptyOrNull() && jwtHandler.CanReadToken(jwtStr))
{
JwtSecurityToken jwtToken = jwtHandler.ReadJwtToken(jwtStr);
object role;
jwtToken.Payload.TryGetValue(ClaimTypes.Role, out role);
tokenModelJwt = new TokenModelJwt
{
Uid = (jwtToken.Id).ObjToInt(),
Role = role != null ? role.ObjToString() : "",
};
}
return tokenModelJwt;
}
/// <summary>
/// 销毁
/// </summary>
/// <param name="jwtStr"></param>
/// <returns></returns>
public static bool Destroy(string jwtStr)
{
var jwtHandler = new JwtSecurityTokenHandler();
TokenModelJwt tokenModelJwt = new TokenModelJwt();
// token校验
if (jwtStr.IsNotEmptyOrNull() && jwtHandler.CanReadToken(jwtStr))
{
JwtSecurityToken jwtToken = jwtHandler.ReadJwtToken(jwtStr);
}
return true;
}
}
/// <summary>
/// 令牌
/// </summary>
public class TokenModelJwt
{
/// <summary>
/// Id
/// </summary>
public long Uid { get; set; }
/// <summary>
/// 登录名
/// </summary>
public string LoginName { get; set; }
/// <summary>
/// 角色
/// </summary>
public string Role { get; set; }
/// <summary>
/// 职能
/// </summary>
public string Work { get; set; }
}
}