在这里提供一个C#加密和解密的方法，都需要一个key作为钥匙：
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/// <summary> /// 加密 /// </summary> /// <param name="rs"></param> /// <returns></returns> public static string DESEncryptMethod(string rs) { byte[] desKey = new byte[] { 0x16, 0x09, 0x14, 0x15, 0x07, 0x01, 0x05, 0x08 }; byte[] desIV = new byte[] { 0x16, 0x09, 0x14, 0x15, 0x07, 0x01, 0x05, 0x08 }; DESCryptoServiceProvider des = new DESCryptoServiceProvider(); try { byte[] inputByteArray = Encoding.Default.GetBytes(rs); //byte[] inputByteArray=Encoding.Unicode.GetBytes(rs); des.Key = desKey; // ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = desIV; //ASCIIEncoding.ASCII.GetBytes(sKey); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); //Write the byte array into the crypto stream //(It will end up in the memory stream) cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); //Get the data back from the memory stream, and into a string StringBuilder ret = new StringBuilder(); foreach (byte b in ms.ToArray()) { //Format as hex ret.AppendFormat("{0:X2}", b); } ret.ToString(); return ret.ToString(); } catch { return rs; } finally { des = null; } } /// <summary> /// 解密 /// </summary> /// <param name="rs"></param> /// <returns></returns> public static string DESDecryptMethod(string rs) { byte[] desKey = new byte[] { 0x16, 0x09, 0x14, 0x15, 0x07, 0x01, 0x05, 0x08 }; byte[] desIV = new byte[] { 0x16, 0x09, 0x14, 0x15, 0x07, 0x01, 0x05, 0x08 }; DESCryptoServiceProvider des = new DESCryptoServiceProvider(); try { //Put the input string into the byte array byte[] inputByteArray = new byte[rs.Length / 2]; for (int x = 0; x < rs.Length / 2; x++) { int i = (Convert.ToInt32(rs.Substring(x * 2, 2), 16)); inputByteArray[x] = (byte)i; } des.Key = desKey; //ASCIIEncoding.ASCII.GetBytes(sKey); des.IV = desIV; //ASCIIEncoding.ASCII.GetBytes(sKey); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); //Flush the data through the crypto stream into the memory stream cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); //Get the decrypted data back from the memory stream StringBuilder ret = new StringBuilder(); return System.Text.Encoding.Default.GetString(ms.ToArray()); } catch { return rs; } finally { des = null; } } |
