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C#DES加密

style length 長度 input test name styles gets pen

記錄一下

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">密鑰長度為8個字符</param>
/// <param name="charset">字符編碼</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">密鑰長度為8個字符</param>
        /// <param name="charset">字符編碼</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;
        }

C#DES加密