在ASP中加密方法有对应的解密方法好象不多,现在根据前辈资料整理出在asp中加密与解密函数

rsa.asp
<%
rem 在ASP中实现加密与解密,加密方法:根据RSA
rem 联系:hnsoso@sina.com
Class clsRSA

    Public PrivateKey
    Public PublicKey
    Public Modulus
    
     
    
    Public Function Crypt(pLngMessage, pLngKey)
        On Error Resume Next
        Dim lLngMod
        Dim lLngResult
        Dim lLngIndex
        If pLngKey Mod 2 = 0 Then
            lLngResult = 1
            For lLngIndex = 1 To pLngKey / 2
                lLngMod = (pLngMessage ^ 2) Mod Modulus
                ' Mod may error on key generation
                lLngResult = (lLngMod * lLngResult) Mod Modulus
                If Err Then Exit Function
            Next
        Else
            lLngResult = pLngMessage
            For lLngIndex = 1 To pLngKey / 2
                lLngMod = (pLngMessage ^ 2) Mod Modulus
                On Error Resume Next
                ' Mod may error on key generation
                lLngResult = (lLngMod * lLngResult) Mod Modulus
                If Err Then Exit Function
            Next
        End If
        Crypt = lLngResult
    End Function



    Public Function Encode(ByVal pStrMessage)
        Dim lLngIndex
        Dim lLngMaxIndex
        Dim lBytAscii
        Dim lLngEncrypted
        lLngMaxIndex = Len(pStrMessage)
        If lLngMaxIndex = 0 Then Exit Function
        For lLngIndex = 1 To lLngMaxIndex
            lBytAscii = Asc(Mid(pStrMessage, lLngIndex, 1))
            lLngEncrypted = Crypt(lBytAscii, PublicKey)
            Encode = Encode & NumberToHex(lLngEncrypted, 4)
        Next
    End Function
    
    Public Function Decode(ByVal pStrMessage)
        Dim lBytAscii
        Dim lLngIndex
        Dim lLngMaxIndex
        Dim lLngEncryptedData
        Decode = ""
        lLngMaxIndex = Len(pStrMessage)
        For lLngIndex = 1 To lLngMaxIndex Step 4
            lLngEncryptedData = HexToNumber(Mid(pStrMessage, lLngIndex, 4))
            lBytAscii = Crypt(lLngEncryptedData, PrivateKey)
            Decode = Decode & Chr(lBytAscii)
        Next
    End Function
    
    Private Function NumberToHex(ByRef pLngNumber, ByRef pLngLength)
        NumberToHex = Right(String(pLngLength, "0") & Hex(pLngNumber), pLngLength)
    End Function

    Private Function HexToNumber(ByRef pStrHex)
        HexToNumber = CLng("&h" & pStrHex)
    End Function

End Class
%>



test.asp
<!--#INCLUDE FILE="RSA.asp"-->
<%
function Encryptstr(Message)
Dim LngKeyE
Dim LngKeyD
Dim LngKeyN
Dim StrMessage
Dim ObjRSA


    LngKeyE = "32823"
    LngKeyD = "20643"
    LngKeyN = "29893"
    StrMessage = Message
    
    Set ObjRSA = New clsRSA
    
   
            ObjRSA.PublicKey = LngKeyE
            ObjRSA.Modulus = LngKeyN
            Encryptstr = ObjRSA.Encode(StrMessage)
    Set ObjRSA = Nothing
end function




function decryptstr(Message)
Dim LngKeyE
Dim LngKeyD
Dim LngKeyN
Dim StrMessage
Dim ObjRSA


    LngKeyE = "32823"
    LngKeyD = "20643"
    LngKeyN = "29893"
    StrMessage = Message
    
    Set ObjRSA = New clsRSA

            ObjRSA.PrivateKey =LngKeyD
            ObjRSA.Modulus=LngKeyN
            decryptstr=ObjRSA.Decode(StrMessage)
    Set ObjRSA = Nothing
end function



dim last,first
first="sohu"
Response.Write "加密前为:"&first
last=Encryptstr(first)
Response.Write "加密后为"&last
Response.Write "解密后为" &decryptstr(last)

%>