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using Microsoft.IdentityModel.Tokens;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;
using Znyc.CloudCar.Configuration;
using Znyc.CloudCar.Utility.Extensions;
namespace Znyc.CloudCar.Auth.OverWrite
{
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 = AppSettingsConstVars.JwtConfigIssuer;
string aud = AppSettingsConstVars.JwtConfigAudience;
string secret = AppSettingsConstVars.JwtConfigSecretKey;
//var claims = new Claim[] //old
var claims = new List<Claim>
{
/*
*
1 uid Claim uid从 Token SerializeJwt() 使
2 HttpContext.User.Claims Policys/PermissionHandler.cs 使
*/
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();
JwtSecurityToken jwtToken = jwtHandler.ReadJwtToken(jwtStr);
object role;
try
{
jwtToken.Payload.TryGetValue(ClaimTypes.Role, out role);
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
var tm = new TokenModelJwt
{
Uid = jwtToken.Id.ObjectToInt(),
Role = role != null ? role.ObjectToString() : ""
};
return tm;
}
}
/// <summary>
/// 令牌
/// </summary>
public class TokenModelJwt
{
/// <summary>
/// Id
/// </summary>
public long Uid { get; set; }
/// <summary>
/// 角色
/// </summary>
public string Role { get; set; }
/// <summary>
/// 职能
/// </summary>
public string Work { get; set; }
}
}