记录一下
DES加密
public static string DESEncrypt(string Data, string key) { return DESEncrypt(Data, key, "utf-8"); } /// <summary> /// DES加密算法 /// </summary> /// <param name="Data">加密明文</param> /// <param name="key">密钥长度为8个字符</param> /// <param name="charset">字符编码</param> /// <returns>返回密文</returns> public static string DESEncrypt(string Data, string key, string charset) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Key = ASCIIEncoding.ASCII.GetBytes(key); des.IV = ASCIIEncoding.ASCII.GetBytes(key); byte[] inputByteArray = Encoding.GetEncoding(charset).GetBytes(Data); System.IO.MemoryStream ms = new System.IO.MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); byte[] ret = ms.ToArray(); cs.Close(); ms.Close(); return BytesToHexString(ret); } public static string BytesToHexString(byte[] bytes) { System.Text.StringBuilder s = new System.Text.StringBuilder(); foreach (byte b in bytes) { s.Append(b.ToString("x2").ToUpper()); } return s.ToString(); }
解密:
public static string DESDecrypt(string Data, string key) { return DESDecrypt(Data, key, "utf-8"); } /// <summary> /// DES 解密算法 /// </summary> /// <param name="Data">密文</param> /// <param name="key">密钥长度为8个字符</param> /// <param name="charset">字符编码</param> /// <returns>明文</returns> public static string DESDecrypt(string Data, string key, string charset) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Key = ASCIIEncoding.ASCII.GetBytes(key); des.IV = ASCIIEncoding.ASCII.GetBytes(key); byte[] inputByteArray = HexStringToBytes(Data); System.IO.MemoryStream ms = new System.IO.MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); byte[] ret = ms.ToArray(); cs.Close(); ms.Close(); return Encoding.GetEncoding(charset).GetString(ret); } public static byte[] HexStringToBytes(string hexString) { if (hexString == null) { throw new ArgumentNullException("hexString"); } if ((hexString.Length & 1) != 0) { throw new ArgumentOutOfRangeException("hexString", hexString, "hexString must contain an even number of characters."); } byte[] result = new byte[hexString.Length / 2]; for (int i = 0; i < hexString.Length; i += 2) { result[i / 2] = byte.Parse(hexString.Substring(i, 2), NumberStyles.HexNumber); } return result; }