string t = DateTime.Now.Ticks.ToString(); t = DESKey.DESEncrypt(t, DESKey.DesKeyStr); string[] strid = new string[t.Length];// for (int i = 0; i < t.Length; i++)//把字符赋给数组 { strid[i] = t.Substring(i, 1); } string s = ""; Random rdid = new Random(); for (int i = 0; i < 9; i++)//从数组随机抽取字符组成新的字符生成机器三 { s += strid[rdid.Next(0, strid.Length)]; }
class DESKey { public const string DesKeyStr = "BLUE2013"; #region DES加密 /// <summary> /// DES加密 /// </summary> /// <param name="pToEncrypt">需要加密的字符串</param> /// <returns>加密后的字符串</returns> public static string DESEncrypt(string pToEncrypt, string DesKeyStr) { try { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt); des.Key = ASCIIEncoding.ASCII.GetBytes(DesKeyStr); des.IV = ASCIIEncoding.ASCII.GetBytes(DesKeyStr); MemoryStream ms = new MemoryStream(); 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(); } catch { return ""; } } #endregion #region DES解密 /// <summary> /// DES解密 /// </summary> /// <param name="pToDecrypt">加密后的字符串</param> /// <returns>解密后的字符串</returns> public static string DESDecrypt(string pToDecrypt, string DesKeyStr) { 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(DesKeyStr); des.IV = ASCIIEncoding.ASCII.GetBytes(DesKeyStr); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); StringBuilder ret = new StringBuilder(); return System.Text.Encoding.Default.GetString(ms.ToArray()); } catch { return ""; } } #endregion }
分类: C#