c#大圣之路笔记——MD5实现字符串、文件加密

  /// <summary>
        /// 传一个文件的路径，返回该文件的MD5字符串
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        private static string GetMd5FromFile(string path)
        {
            using (MD5 md5File= MD5.Create())
            {
                using (FileStream fileRead = File.OpenRead(path))
                {
                    byte[] md5Buffer= md5File.ComputeHash(fileRead);
                    md5File.Clear();
                    StringBuilder sbMd5 = new StringBuilder();
                    for (int i = 0; i < md5Buffer.Length; i++)
                    {
                        sbMd5.Append(md5Buffer[i].ToString("X2"));
                    }
                    return sbMd5.ToString();
                } 
            }  

        }




        /// <summary>
        /// 传一个字符串，方法改字符串的MD5字符串
        /// </summary>
        /// <param name="msg"></param>
        /// <returns></returns>
        private static string GetMd5FromString(string msg)
        {
            //1.创建一个用来计算MD5值的类的对象
            using ( MD5 md5 = MD5.Create())
            {
                //把字符串转换成byte[]
                byte[] msgBuffer = Encoding.UTF8.GetBytes(msg);
                //2.计算给定字符串的MD5值，如何把一个长度为16的byte[]数组转换为一个长度为32的字符串：就是把每个byte转成16进制同时保留2位即可
                byte[] md5Buffer=  md5.ComputeHash(msgBuffer);
                md5.Clear();
                StringBuilder sbMd5 = new StringBuilder();
                for (int i = 0; i < md5Buffer.Length; i++)
                {
                    //字母小写：x ;字母大写：X
                    sbMd5.Append(md5Buffer[i].ToString("X2"));
                }

                return sbMd5.ToString();
            }
           

        }