当前位置: 首页 > 图文教程 > 网络编程 > ASP > 不错的主要用于加密的vbs(asp)位移运算类

ASP
构建你的网站新闻自动发布系统之三
构建你的网站新闻自动发布系统之四
如何用ASP编写网站统计系统一
如何用ASP编写网站统计系统二
如何用ASP编写网站统计系统三
如何用ASP编写网站统计系统四
ASP Error 0115的一些解决办法
ASP 3.0 新特色先睹为快（一）
ASP 3.0 新特色先睹为快（二）
ASP主件中的安全问题
一个汉字转成拼音的代码
使用w3Sockets组件实现域名查询功能
ASP中实现文件上传方法的研究
构建免受FSO组件威胁虚拟主机
用XMLHTTP做一个自己特色的Google
用asp实现的代码批量修改程序
无组件的数据库的备份与还原
用ASPJPEG组件制作图片的缩略图和加水印
解密ASP源代码
XmlHttp异步获取网站数据的例子

No. « 192 193 194 195 »

技术文章搜索

关键字

ASP 中的 不错的主要用于加密的vbs(asp)位移运算类

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-09-13   浏览: 177 ::
收藏到网摘: n/a

<script language="vbscript">
' Aother: 奔腾的心
' QQ: 7180001
' Date: 2008-01-17
Class mShift
Private m_lPower2(31)
Public Function RShift(ByVal lThis, ByVal lBits)
On Error Resume Next
Init
If (lBits <= 0) Then
RShift = lThis
ElseIf (lBits > 63) Then
' .. error ...
ElseIf (lBits > 31) Then
RShift = 0
Else
If (lThis And m_lPower2(31 - lBits)) = m_lPower2(31 - lBits) Then
RShift = (lThis And (m_lPower2(31 - lBits) - 1)) * m_lPower2(lBits) Or
m_lPower2(31)
Else
RShift = (lThis And (m_lPower2(31 - lBits) - 1)) * m_lPower2(lBits)
End If
End If
End Function
Public Function LShift(ByVal lThis, ByVal lBits)
On Error Resume Next
Init
If (lBits <= 0) Then
LShift = lThis
ElseIf (lBits > 63) Then
' ... error ...
ElseIf (lBits > 31) Then
LShift = 0
Else
If (lThis And m_lPower2(31)) = m_lPower2(31) Then
LShift = (lThis And &H7FFFFFFF) \ m_lPower2(lBits) Or m_lPower2(31 - lBits)
Else
LShift = lThis \ m_lPower2(lBits)
End If
End If
End Function
Private Sub Init()
On Error Resume Next
m_lPower2(0) = &H1&
m_lPower2(1) = &H2&
m_lPower2(2) = &H4&
m_lPower2(3) = &H8&
m_lPower2(4) = &H10&
m_lPower2(5) = &H20&
m_lPower2(6) = &H40&
m_lPower2(7) = &H80&
m_lPower2(8) = &H100&
m_lPower2(9) = &H200&
m_lPower2(10) = &H400&
m_lPower2(11) = &H800&
m_lPower2(12) = &H1000&
m_lPower2(13) = &H2000&
m_lPower2(14) = &H4000&
m_lPower2(15) = &H8000&
m_lPower2(16) = &H10000
m_lPower2(17) = &H20000
m_lPower2(18) = &H40000
m_lPower2(19) = &H80000
m_lPower2(20) = &H100000
m_lPower2(21) = &H200000
m_lPower2(22) = &H400000
m_lPower2(23) = &H800000
m_lPower2(24) = &H1000000
m_lPower2(25) = &H2000000
m_lPower2(26) = &H4000000
m_lPower2(27) = &H8000000
m_lPower2(28) = &H10000000
m_lPower2(29) = &H20000000
m_lPower2(30) = &H40000000
m_lPower2(31) = &H80000000
End Sub
End Class
Dim sft
Set sft = New mShift
MsgBox sft.RShift(200, 4)
MsgBox sft.LShift(200, 4)
Set sft = Nothing
</script>

<script language="javascript">
alert(200<<4);
alert(200>>4);
</script>