.NET中DES加密代码转成ASP代码

BoyHaXin 2007-11-30 09:50:43

using System;

using System.Security.Cryptography;



namespace gs.util

{

	/// <summary>

	/// DES 的摘要说明。

	/// </summary>

	public class DES

	{

		private SymmetricAlgorithm mCSP;



		public DES()

		{

			mCSP = new TripleDESCryptoServiceProvider();

		}



		/// <summary>

		/// 得到密钥

		/// </summary>

		/// <returns></returns>

		public string getKey()

		{

			mCSP.GenerateKey();

			return Convert.ToBase64String(mCSP.Key).Trim();

		}



		/// <summary>

		/// 得到干扰码

		/// </summary>

		/// <returns></returns>

		public string getIV()

		{

			mCSP.GenerateIV();

			return Convert.ToBase64String(mCSP.IV).Trim();

		}



		/// <summary>

		/// 加密

		/// </summary>

		/// <param name="Value"></param>

		/// <param name="p_strKey">密钥</param>

		/// <param name="p_strIV">干扰码</param>

		/// <returns></returns>

		public string EncryptString(string Value,string p_strKey,string p_strIV)

		{

			ICryptoTransform ct;

			System.IO.MemoryStream ms;

			CryptoStream cs;

			byte[] byt;



			//ct = mCSP.CreateEncryptor(mCSP.Key, mCSP.IV);

			ct = mCSP.CreateEncryptor(Convert.FromBase64String(p_strKey.Trim()),Convert.FromBase64String(p_strIV.Trim()) );



			byt = System.Text.Encoding.UTF8.GetBytes(Value);



			ms = new System.IO.MemoryStream();

			cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);

			cs.Write(byt, 0, byt.Length);

			cs.FlushFinalBlock();



			cs.Close();



			return Convert.ToBase64String(ms.ToArray());

		}



		/// <summary>

		/// 解密

		/// </summary>

		/// <param name="Value"></param>

		/// <param name="p_strKey"></param>

		/// <param name="p_strIV"></param>

		/// <returns></returns>

		public string DecryptString(string Value,string p_strKey,string p_strIV)

		{

			ICryptoTransform ct;

			System.IO.MemoryStream ms;

			CryptoStream cs;

			byte[] byt;



			//ct = mCSP.CreateDecryptor(mCSP.Key, mCSP.IV);

			ct = mCSP.CreateDecryptor(Convert.FromBase64String(p_strKey.Trim()),Convert.FromBase64String(p_strIV.Trim()) );



			byt = Convert.FromBase64String(Value);



			ms = new System.IO.MemoryStream();

			cs = new CryptoStream(ms, ct, CryptoStreamMode.Write);

			cs.Write(byt, 0, byt.Length);

			cs.FlushFinalBlock();



			cs.Close();



			return System.Text.Encoding.UTF8.GetString(ms.ToArray());

		}

	}

}