加密怎么让密文里面带符号，附代码
public class Security { string _QueryStringKey = "ABCDEFH"; //URL传输参数加密Key//ijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ string _PasswordKey = "hgfedcba"; //Password加密Key//ZYXWVUTSRQPONMLKJIHGFEDCBAzyxwvutsrqponmlkji public Security() { // // TODO: 在此处添加构造函数逻辑 // } public string EncryptQueryString(string QueryString) { return Encrypt(QueryString, _QueryStringKey); } /// 解密URL传输的字符串 public string DecryptQueryString(string QueryString) { return Decrypt(QueryString, _QueryStringKey); } /// 加密帐号口令 public string EncryptPassword(string Password) { return Encrypt(Password, _PasswordKey); } /// 解密帐号口令 public string DecryptPassword(string Password) { return Decrypt(Password, _PasswordKey); } /// DEC 加密过程 public string Encrypt(string pToEncrypt, string sKey) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); //把字符串放到byte数组中 byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt); //byte[] inputByteArray=Encoding.Unicode.GetBytes(pToEncrypt); des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); //建立加密对象的密钥和偏移量 des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); //原文使用ASCIIEncoding.ASCII方法的GetBytes方法 MemoryStream ms = new MemoryStream(); //使得输入密码必须输入英文文本 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); StringBuilder ret = new StringBuilder(); foreach (byte b in ms.ToArray()) { ret.AppendFormat("{0:X2}", b); } ret.ToString(); return ret.ToString(); } /// DEC 解密过程 public string Decrypt(string pToDecrypt, string sKey) { try { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] inputByteArray = new byte[pToDecrypt.Length / 2]; for (int x = 0; x < pToDecrypt.Length / 2; x++) { int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)); inputByteArray[x] = (byte)i; } des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); //建立加密对象的密钥和偏移量，此值重要，不能修改 des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); //if (cs.Length > 0&&cs.Length!=null) //{ cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); StringBuilder ret = new StringBuilder(); //建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象 return System.Text.Encoding.Default.GetString(ms.ToArray()); } catch { return ""; } // } // else //{ //return ""; //} } /// 检查己加密的字符串是否与原文相同 public bool ValidateString(string EnString, string FoString, int Mode) { switch (Mode) { default: case 1: if (Decrypt(EnString, _QueryStringKey) == FoString.ToString()) { return true; } else { return false; } case 2: if (Decrypt(EnString, _PasswordKey) == FoString.ToString()) { return true; } else { return false; } } } }