C#获取CPU与网卡硬盘序列号及Base64和DES加密解密操作类

 public class RegisterHelp
    {
        /// <summary>
        /// CPU
        /// </summary>
        /// <returns></returns>
        public string GetCpu()
        {
            string strCpu = null;
            ManagementClass myCpu = new ManagementClass("win32_Processor");
            ManagementObjectCollection myCpuConnection = myCpu.GetInstances();
            foreach (ManagementObject myObject in myCpuConnection)
            {
                strCpu = myObject.Properties["Processorid"].Value.ToString();
                break;
            }
            return strCpu;
        }

        /// <summary>
        /// 网卡
        /// </summary>
        /// <returns></returns>
        public string GetMacAddress()
        {
            try
            {
                string mac = "";
                ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
                ManagementObjectCollection moc = mc.GetInstances();
                foreach (ManagementObject mo in moc)
                {
                    if ((bool)mo["IPEnabled"] == true)
                    {
                        mac = mo["MacAddress"].ToString();
                        break;
                    }
                }
                moc = null;
                mc = null;
                return mac;
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }

        }

        /// <summary>
        /// 硬盘
        /// </summary>
        /// <returns></returns>
        public string GetDiskID()
        {
            try
            {
                String HDid = "";
                ManagementClass mc = new ManagementClass("Win32_DiskDrive");
                ManagementObjectCollection moc = mc.GetInstances();
                foreach (ManagementObject mo in moc)
                {
                    HDid = (string)mo.Properties["Model"].Value;
                }
                moc = null;
                mc = null;
                return HDid;
            }
            catch
            {
                return "unknow";
            }
            finally
            {
            }

        }

        /// <summary>
        /// Base64解密
        /// </summary>
        /// <param name="input">需要解密的字符串</param>
        /// <returns></returns>
        public string Base64Decrypt(string input)
        {
            return Base64Decrypt(input, new UTF8Encoding());
        }

        /// <summary>
        /// DES解密
        /// </summary>
        /// <param name="data">解密数据</param>
        /// <param name="key">8位字符的密钥字符串(需要和加密时相同)</param>
        /// <param name="iv">8位字符的初始化向量字符串(需要和加密时相同)</param>
        /// <returns></returns>
        public string DESDecrypt(string data, string key, string iv)
        {
            byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(key);
            byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(iv);

            byte[] byEnc;
            try
            {
                byEnc = Convert.FromBase64String(data);
            }
            catch
            {
                return null;
            }

            DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
            MemoryStream ms = new MemoryStream(byEnc);
            CryptoStream cst = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
            StreamReader sr = new StreamReader(cst);
            return sr.ReadToEnd();
        }

        /// <summary>
        /// Base64解密
        /// </summary>
        /// <param name="input">需要解密的字符串</param>
        /// <param name="encode">字符的编码</param>
        /// <returns></returns>
        public string Base64Decrypt(string input, Encoding encode)
        {
            return encode.GetString(Convert.FromBase64String(input));
        }

        public string Decode(string str)
        {
            string dtext = "";
            for (int i = ; i < str.Length; i++)
            {
                dtext = dtext + (char)(str[i] -  +  * );
            }
            return dtext;
        }

        public string GetText(RichTextBox richTextBox)
        {
            TextRange textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);
            return textRange.Text;
        }
    }