HMAC_SHA1加密

hmacsha1在很多签名计算中都很常用了，这里对两种可能返回的字符串类型做了分类
一种是直接返回字符串，一种是baset64后返回
需要看第三方对接文档中是否有特别说明，调试时如果报错，要比对串的内容看对方是否做了base64

#region HMACSHA1加密  将二进制数据直接转为字符串返回
        /// <summary>
        /// HMACSHA1加密
        /// </summary>
        /// <param name="text">要加密的原串</param>
        ///<param name="key">私钥</param>
        /// <returns></returns>
        public static string HMACSHA1Text(string text,string key)
        {
            //HMACSHA1加密
            HMACSHA1 hmacsha1 = new HMACSHA1();
            hmacsha1.Key = System.Text.Encoding.UTF8.GetBytes(key);

            byte[] dataBuffer = System.Text.Encoding.UTF8.GetBytes(text);
            byte[] hashBytes = hmacsha1.ComputeHash(dataBuffer);

            var enText = new StringBuilder();
            foreach (byte iByte in hashBytes)
            {
                enText.AppendFormat("{0:x2}", iByte);
            }
            return enText.ToString();
            
        }
        #endregion

#region HMACSHA1加密  对二进制数据转Base64后再返回
        /// <summary>
        /// HMACSHA1加密
        /// </summary>
        /// <param name="text">要加密的原串</param>
        ///<param name="key">私钥</param>
        /// <returns></returns>
        public static string HMACSHA1Text(string text,string key)
        {
            //HMACSHA1加密
            HMACSHA1 hmacsha1 = new HMACSHA1();
            hmacsha1.Key = System.Text.Encoding.UTF8.GetBytes(key);

            byte[] dataBuffer = System.Text.Encoding.UTF8.GetBytes(text);
            byte[] hashBytes = hmacsha1.ComputeHash(dataBuffer);
            
            return Convert.ToBase64String(hashBytes);
            
        }
        #endregion