在csdn找了个加密解密的方法 ，但是不知道咋用啊 ，谁给教教？

[jiery666]

http://bbs.csdn.net/topics/360136430
asp加密

<%
Dim ClearPassKey=""  ‘512位的密匙"
Signature="aaaaaaa" ‘干扰码
Wise=False
'密码提取初始位置
Initial=14
'密码提取间隔值
Quantity=5
 
ClearKeyLength=512
'特征码补位，检测系统特征码长度，是否能够需要加密的字符串进行异或操作，要求长度相同
Function strFill(AccountPass)
    Dim I
    IF Len(AccountPass) > Len(Signature) Then
        'FillLen = Len(AccountPass) - Len(Signature)
        For I = 1 To Len(AccountPass) \ Len(Signature) + 1
            Signature = Signature & Signature
        Next
        Signature = Mid(Signature,1,Len(AccountPass))
    Else
        Signature = Mid(Signature,1,Len(AccountPass))
    End IF
    strFill = Signature
End Function
 
 
'从密匙明文中提取密匙
Function Distill(Length,Wise,Quantity,Initial,KeyLength)
    'Length           用户密码称度   
    'ClearPassKey     密码明文串   
    'Wise             提取方式  {True：Quantity固定间隔值 False：Quantity递增倍数}
    'Initial          初始位置     
    'KeyLength        密码明文串长度
    'strLength        根据用户密码长度及截取方式后共需要多少个字符，如果字符串长度超过密码明文长度就会出错
    Dim strLength,I,chrDistill,strDistill,Degree,chrLenght
    IF Wise = True Then
        strLength = Initial+(Length-1)*(Quantity+1)
        IF strLength <= KeyLength Then
            For I = 1 To Length
                IF I=1 Then
                    chrDistill = Mid(ClearPassKey,Initial,1)
                    '第一个字符提取 从密匙串是起始位置提取一个
                Else
                    chrDistill = Mid(ClearPassKey,(Initial+(Quantity+1)*(I-1)),1)
                    '第二个字符提取 从密匙串的起始位置+间隔字符数+1的位置
                End IF
                strDistill = strDistill & chrDistill
            Next
        End IF
    Else
        For Degree = 1 To Length
            IF Degree = 1 Then
                strLength = Initial
            Else
                strLength = strLength+Quantity*(Degree-1)+1
            End IF
        Next
        IF strLength <= KeyLength Then
            For I = 1 To Length
                IF I=1 Then
                    chrLenght = Initial
                    chrDistill = Mid(ClearPassKey,chrLenght,1)
                    'Response.Write chrLenght&"|"&chrDistill&"<br>"
                Else
                    chrLenght = chrLenght+Quantity*(I-1)+1
                    chrDistill = Mid(ClearPassKey,chrLenght,1)
                    'Response.Write chrLenght&"|"&chrDistill&"<br>"
                    '第二个字符提取 从密匙串的起始位置+(间隔字符数+1的位置)*（循环次数-1）+1 {第一次循环不用递增，只要从起始位置开始取即可}
                End IF
                strDistill = strDistill & chrDistill
            Next
        End IF
    End IF
    Distill = strDistill
End Function
 
 
 
Function EnCrypt(DistillKey,Signature,AccountPass)
    Dim I,chrDistillKey,chrAccountPass,chrEnCryptPass,strEnCryptPass,chrSignature,chrEnCrypt,strEnCrypt
    For I = 1 to Len(AccountPass)
    'for 循环，从用户输入的密码串中，第一个字符开始到字符串结束，每个字符都进行一次循环内部的操作
        chrDistillKey = Asc(Mid(DistillKey,I,1))
        'mid(g_Key,I,1) 从密匙文中从第I个字符开始，取出一个字符，Asc()获取这个字符的ASCII码值
        chrAccountPass = Asc(Mid(AccountPass,I,1))
        'mid(strCryptThis,I,1) 从系统密匙中的第I个字符开始，取第一个字符，Asc()获取这个字符的ASCII码值
        chrEnCryptPass = chrDistillKey Xor chrAccountPass
        strEnCryptPass = strEnCryptPass & Chr(chrEnCryptPass)
    Next
    For I = 1 to Len(Signature)
    'for 循环，从用户输入的密码串中，第一个字符开始到字符串结束，每个字符都进行一次循环内部的操作
        chrEnCryptPass = Asc(Mid(strEnCryptPass,I,1))
        'mid(g_Key,I,1) 从密匙文中从第I个字符开始，取出一个字符，Asc()获取这个字符的ASCII码值
        chrSignature = Asc(Mid(Signature,I,1))
        'mid(strCryptThis,I,1) 从系统密匙中的第I个字符开始，取第一个字符，Asc()获取这个字符的ASCII码值
        chrEnCrypt = chrEnCryptPass Xor chrSignature
        strEnCrypt = strEnCrypt & Chr(chrEnCrypt)
    Next
    EnCrypt = strEnCrypt
End Function
%>

c#中解密

private readonly string Signature = "aaaaaaa" //必须与上面对应;
   
    private const string ClearPassKey = @""; //512位密匙，必须与上面对应
 
    /// <summary>
    ///  取特征码长度要一至
    /// </summary>
    /// <param name="lenth"></param>
    /// <returns></returns>
    public char[] strFill(int lenth)
    {
        string signature=Signature;
        if (lenth > signature.Length)
        {
            for (int i = 1; i <= (lenth / signature.Length + 1); i++)
            {
                signature += Signature;
            }
            signature += Signature;
        }
        signature = signature.Substring(0, lenth);
        return signature.ToCharArray();
    }
    /// <summary>
    /// 取密匙
    /// </summary>
    /// <param name="Length"></param>
    /// <returns></returns>
    public char[] Distill(int Length)
    {
        string chrDistill="", strDistill="";
        for (int i = 0; i < Length; i++)
        {
            chrDistill = ClearPassKey.Substring(Length + i, 1);
            strDistill = strDistill + chrDistill;
        }
        return strDistill.ToCharArray();
    }
    /// <summary>
    /// 解密
    /// </summary>
    /// <param name="PassWord"></param>
    /// <returns></returns>
    public string DeCrypt(string PassWord)
    {
         
        int chrDistill = 0, chrSignature = 0, chrDeCryptPass = 0, chrPassWord = 0, chrAdd = 0, chrDeCrypt=0;
         
         
        string strDeCryptPass="",strDeCrypt="";
 
        string[] snum = Regex.Split(PassWord, "[A-Z]", RegexOptions.IgnoreCase);
        string pat = @"[A-Z]";
        string[] chr = new string[snum.Length];
        Regex r = new Regex(pat, RegexOptions.IgnoreCase);
        MatchCollection m = r.Matches(PassWord);
        for (int i = 0; i < m.Count; i++)
        {
            chr[i + 1] = m[i].Value;
        }
        int len = chr.Length - 1;
        char[] DistillKey = Distill(len);
        char[] Signature = strFill(len);
        for (int i = 0; i < Signature.Length; i++)
        {
            //chrDistill = Convert.ToInt32((char)DistillKey.Substring(i, 1));
            //chrSignature = Convert.ToInt32((char)Signature.Substring(i, 1));
            chrDistill = Convert.ToInt32(DistillKey[i]);
            chrSignature = Convert.ToInt32(Signature[i]);
            chrDeCryptPass=chrDistill^chrSignature;
            strDeCryptPass = strDeCryptPass + Convert.ToChar(chrDeCryptPass);
        }
        for (int i = 1; i <= len; i++)
        {
            chrDeCryptPass = Convert.ToInt32(strDeCryptPass.ToCharArray()[i-1]);
            chrPassWord = Convert.ToInt32(chr[i].ToCharArray()[0]);
            chrAdd=0;
            if (snum[i] != "")
                chrAdd = Convert.ToInt32(snum[i]);
            chrPassWord = chrPassWord - chrAdd;
            chrDeCrypt = chrDeCryptPass ^ chrPassWord;
            strDeCrypt = strDeCrypt + Convert.ToChar(chrDeCrypt);
        }
        return strDeCrypt;
    }

但是对于以上两段方法 我不知道咋调用 ？
谁给举个例子？