예제 #1
0
        //取得使用者資訊
        public User GetUser(IHttpContextAccessor httpContextAccessor)
        {
            //var token = HttpContext.Current.Request.Headers["Authoriaztion"];
            string token = httpContextAccessor.HttpContext.Request.Headers["Authorization"];

            token = token.Replace("Bearer ", "").TrimStart(' ');

            var split     = token.Split('.');
            var iv        = split[0];
            var encrypt   = split[1];
            var signature = split[2];

            //檢查簽章是否正確
            if (signature != TokenCrypto
                .ComputeHMACSHA256(iv + "." + encrypt, key.Substring(0, 64)))
            {
                return(null);
            }

            //使用 AES 解密 Payload
            var base64 = TokenCrypto
                         .AESDecrypt(encrypt, key.Substring(0, 16), iv);
            var json    = Encoding.UTF8.GetString(Convert.FromBase64String(base64));
            var payload = JsonConvert.DeserializeObject <Payload>(json);

            //檢查是否過期
            if (payload.exp < Convert.ToInt32(
                    (DateTime.Now - new DateTime(1970, 1, 1)).TotalSeconds))
            {
                return(null);
            }

            return(payload.info);
        }
예제 #2
0
        //產生 Token
        public Token Create(User user)
        {
            var exp = 3600;   //過期時間(秒)

            //稍微修改 Payload 將使用者資訊和過期時間分開
            var payload = new Payload
            {
                info = user,
                //Unix 時間戳
                exp = Convert.ToInt32(
                    (DateTime.Now.AddSeconds(exp) -
                     new DateTime(1970, 1, 1)).TotalSeconds)
            };

            var json   = JsonConvert.SerializeObject(payload);
            var base64 = Convert.ToBase64String(Encoding.UTF8.GetBytes(json));
            var iv     = Guid.NewGuid().ToString().Replace("-", "").Substring(0, 16);

            //使用 AES 加密 Payload
            var encrypt = TokenCrypto
                          .AESEncrypt(base64, key.Substring(0, 16), iv);

            //取得簽章
            var signature = TokenCrypto
                            .ComputeHMACSHA256(iv + "." + encrypt, key.Substring(0, 64));

            return(new Token
            {
                //Token 為 iv + encrypt + signature,並用 . 串聯
                access_token = iv + "." + encrypt + "." + signature,
                //Refresh Token 使用 Guid 產生
                refresh_token = Guid.NewGuid().ToString().Replace("-", ""),
                expires_in = exp,
            });
        }