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;}
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