Asp.Net Core JWTHelper

Jwt生成后 通过判断时间再有效期内重新生成新的Token

    public static class JWTHelper
    {
        /// 

        /// 创建token
        /// 
        ///  JWT的签发者
        /// 接收JWT的一方
        /// 什么时候过期
        /// 自定义用户值
        /// 密钥
        /// SecurityAlgorithms.HmacSha256 加密方式
        /// 
        public static string CreateToken(string issuer,string audience,DateTime expires, Claim[] claims,string SecurityKey, string Algorithms)
        {
            SymmetricSecurityKey key= new SymmetricSecurityKey(Encoding.UTF8.GetBytes(SecurityKey));
            //证书
            SigningCredentials credentials = new SigningCredentials(key, Algorithms);
            //令牌
            JwtSecurityToken token= new JwtSecurityToken(
                    issuer: issuer,
                    audience: audience,
                    claims: claims,
                    expires: expires,
                    signingCredentials: credentials);
            return new JwtSecurityTokenHandler().WriteToken(token);
        }
        /// 

        /// 刷新token
        /// 
        /// 
        public static string RefreshToken(string Atoken, string SecurityKey)
        {
            //jwt 解密token
            JwtSecurityTokenHandler handler = new JwtSecurityTokenHandler();
            JwtSecurityToken token = handler.ReadJwtToken(Atoken);
            return CreateToken(token.Issuer,token.Audiences.FirstOrDefault(),DateTime.Now.AddSeconds(10),new Claim[]{new Claim(ClaimTypes.Name, token.Payload[ClaimTypes.Name].ToString())}, SecurityKey,token.SignatureAlgorithm);
            
        }
    }