ASP版本支付宝支付类，自动判断手机或PC

支付宝提供的DEMO文件太多了，调用也不是很方便，于是合并了支付宝 支付请求、检查通知、支付返回 的操作到一个类中，做到了可以在任何asp项目中引用。因为函数都在类内部，所以不会引起函数名冲突的问题。另外本类已经实现了手机、PC自动判断，分别调用对应的接口。

class AlipayClass
    
    private partnerId
    private partnerKey
    private partnerUser
    private pgCharset
    private signType
    
    private payGatway
    private payVerify
    
    public notifyUrl
    public callbackUrl
    public actionName
    
    private BITS_TO_A_BYTE
    private BYTES_TO_A_WORD
    private BITS_TO_A_WORD
    
    public sub Class_Initialize()
        
        partnerId   = "pid(合作商编号)"
        partnerKey  = "key(支付秘钥)"
        partnerUser = "支付宝账号，[email protected]"
        
        payGatway   = "https://mapi.alipay.com/gateway.do?"
        payVerify   = "https://mapi.alipay.com/gateway.do?service=notify_verify&"
        
        '单页模式时，url中的action，阿里返回结果时 不带此参数(action=xxx)
        '由于 action 参数不参与签名，会导致sign对不上
        '?action=pay    支付
        '?action=check  检查支付
        actionName = "action"
        
        signType    = "MD5"
        pgCharset   = "gbk"
        notifyUrl   = ""
        callbackUrl = ""
        
        call Md5Initial()
    end sub
    
    public sub Class_Terminate()
    end sub
    
    public function Pay(byval out_trade_no, byval subject, byval body, byval total_fee)
        if notifyUrl = "" or callbackUrl = "" then
            currentUrl =  "http://" & Request.Servervariables("SERVER_NAME")
            if Request.Servervariables("SERVER_PORT") <> 80 then currentUrl = currentUrl & ":" & Request.Servervariables("SERVER_PORT")
            if notifyUrl = "" then notifyUrl = currentUrl & "/order/notify.asp"
            if callbackUrl = "" then callbackUrl = currentUrl & Request.Servervariables("SCRIPT_NAME") & "?" & actionName & "=callback"
        end if
        if left(total_fee, 1) = "." then total_fee = "0" & total_fee
        show_url = Request.Servervariables("HTTP_REFERER")  '产品链接，即 本页的前一页链接
        '支付类型
        payment_type = "1"
        
        userAgent = lcase(Request.Servervariables("HTTP_USER_AGENT"))
        if instr(userAgent, "android") > 0 or instr(userAgent, "iphone") > 0 then '自动识别手机或PC
            serviceName = "alipay.wap.create.direct.pay.by.user"    '手机支付
        else
            serviceName = "create_direct_pay_by_user"   'PC支付
        end if
        sParaTemp = Array( "service=" & serviceName , "partner=" & partnerId, "_input_charset=" & pgCharset, "payment_type=" & payment_type, "notify_url=" & notifyUrl, "return_url=" & callbackUrl, "out_trade_no=" & out_trade_no, "subject=" & subject, "total_fee=" & total_fee, "body=" & body, "seller_email=" & partnerUser, "seller_id=" & partnerId,"show_url=" & show_url)
        Pay =  BuildRequestForm(sParaTemp, "POST", "立即支付，如果没有跳转请点击这里")
    end function
    
    private function CreateResult(byval status, byval trade_no, byval total_fee, byval out_trade_no)
        set CreateResult = Server.CreateObject("Scripting.Dictionary")
        call CreateResult.add("status", status)
        if status = false then
            call CreateResult.add("message", trade_no)
        else
            call CreateResult.add("trade_no", trade_no)
            call CreateResult.add("out_trade_no", out_trade_no)
            call CreateResult.add("total_fee", cSng(total_fee))
        end if
    end function
    
    public function GetResult()
        sParaTemp = GetRequestGet()
        If IsArray(sParaTemp) Then
            mysign = GetSignVeryfy(sParaTemp)
            sResponseTxt = "true"
            If Request.QueryString("notify_id") <> "" Then
                sResponseTxt = GetResponse(Request.QueryString("notify_id"))
            End If
            If mysign = Request.QueryString("sign") Then
                if sResponseTxt = "true" then
                    If Request.QueryString("trade_status") = "TRADE_FINISHED" or Request.QueryString("trade_status") = "TRADE_SUCCESS" Then
                        set GetResult = CreateResult(true, Request.QueryString("trade_no"), Request.QueryString("total_fee"), Request.QueryString("out_trade_no"))
                    Else
                        set GetResult = CreateResult(false, "支付状态错误", "", "")
                    End If
                else
                    set GetResult = CreateResult(false, "检查支付状态错误", "", "")
                end if
            Else
                set GetResult = CreateResult(false, "签名错误", "", "")
            End If
        Else
            set GetResult = CreateResult(false, "非法访问", "", "")
        End If
    end function
    
    public function GetNotify()
        sParaTemp = GetRequestPost()
        If IsArray(sParaTemp) Then
            mysign = GetSignVeryfy(sParaTemp)
            sResponseTxt = "true"
            If Request.QueryString("notify_id") <> "" Then
                sResponseTxt = GetResponse(Request.QueryString("notify_id"))
            End If
            If mysign = Request.form("sign") Then
                if sResponseTxt = "true" then
                    If Request.QueryString("trade_status") = "TRADE_FINISHED" or Request.form("trade_status") = "TRADE_SUCCESS" Then
                        set GetNotify = CreateResult(true, Request.form("trade_no"), Request.form("total_fee"), Request.form("out_trade_no"))
                    Else
                        set GetNotify = CreateResult(false, "支付状态错误", "", "")
                    End If
                else
                    set GetNotify = CreateResult(false, "检查支付状态错误", "", "")
                end if
            Else
                set GetNotify = CreateResult(false, "签名错误", "", "")
            End If
        Else
            set GetNotify = CreateResult(false, "非法访问", "", "")
        End If
    end function
    
    '=====================================================================================
    '  摘要和用到的函数（摘自alipaySDK）
    '=====================================================================================
    
    private function GetResponse(notify_id)
        Dim sUrl, objHttp, sResponseTxt
        sUrl = payVerify & "partner=" & partnerId & "¬ify_id=" & notify_id
        Set objHttp = Server.CreateObject("Microsoft.XMLHTTP")
        objHttp.open "GET", sUrl, False, "", ""
        objHttp.send()
        sResponseTxt = objHttp.ResponseText
        Set objHttp = Nothing
        GetResponse = sResponseTxt
    end function
    
    private function GetRequestGet()
        Dim sPara(), i
        i = 0
        For Each varItem in Request.QueryString
            if varItem <> actionName then
                Redim Preserve sPara(i)
                sPara(i) = varItem & "=" & Request(varItem)
                i = i + 1
            end if
        Next
        If i = 0 Then   '验证是否有数组传来
            GetRequestGet = ""
        Else
            GetRequestGet = sPara
        End If
    end function
    
    private function GetRequestPost()
        Dim sPara(), i
        i = 0
        For Each varItem in Request.Form
            Redim Preserve sPara(i)
            sPara(i) = varItem&"="&Request(varItem)
            i = i + 1
        Next
        
        If i = 0 Then   '验证是否有数组传来
            GetRequestPost = ""
        Else
            GetRequestPost = sPara
        End If
    end function
 
    public function BuildRequestForm(sParaTemp, sMethod, sButtonValue)
        Dim sHtml, nCount
        sPara = BuildRequestPara(sParaTemp)
        sHtml = "

" & vbCrlf
        nCount = ubound(sPara)
        For i = 0 To nCount
            iPos = Instr(sPara(i),"=")
            nLen = Len(sPara(i))
            sItemName = left(sPara(i),iPos-1)
            sItemValue = right(sPara(i),nLen-iPos)
            sHtml = sHtml & "" & vbCrlf
        next
        sHtml = sHtml & "" & sButtonValue & "" & vbCrlf
        sHtml = sHtml & "

" & vbCrlf
        sHtml = sHtml & ""
        BuildRequestForm = sHtml
    end function
    
    private function BuildRequestPara(sParaTemp)
        Dim mysign
        sPara = FilterPara(sParaTemp)
        sParaSort = SortPara(sPara)
        mysign = BuildRequestMysign(sParaSort)
        nCount = ubound(sParaSort)
        Redim Preserve sParaSort(nCount+1)
        sParaSort(nCount+1) = "sign=" & mysign
        Redim Preserve sParaSort(nCount+2)
        sParaSort(nCount+2) = "sign_type=" & signType
        BuildRequestPara = sParaSort
    end function
    
    private function FilterPara(sPara)
        Dim sParaFilter(),nCount,j
        nCount = ubound(sPara)
        j = 0
        For i = 0 To nCount
            pos = Instr(sPara(i),"=")
            nLen = Len(sPara(i))
            itemName = left(sPara(i),pos-1)
            itemValue = right(sPara(i),nLen-pos)
            If itemName <> "sign" And itemName <> "sign_type" And itemValue <> "" and isnull(itemValue) = false Then
                Redim Preserve sParaFilter(j)
                sParaFilter(j) = sPara(i)
                j = j + 1
            End If
        Next
        FilterPara = sParaFilter
    end function
    
    private function BuildRequestMysign(sParaSort)
        prestr = CreateLinkstring(sParaSort)
         Select Case signType
            Case "MD5"
                BuildRequestMysign = Md5Sign(prestr)
            Case Else
                BuildRequestMysign = ""
         End Select
    end function
    
    private function GetSignVeryfy(sParaTemp)
        Dim mysign
        sPara = FilterPara(sParaTemp)
        sParaSort = SortPara(sPara)
        prestr = CreateLinkstring(sParaSort)
         Select Case signType
            Case "MD5"
                GetSignVeryfy = Md5Sign(prestr)
            Case Else
                GetSignVeryfy = ""
         End Select
    end function
    
    private function CreateLinkstring(sPara)
        nCount = ubound(sPara)
        Dim prestr
        For i = 0 To nCount
            If i = nCount Then
                prestr = prestr & sPara(i)
            Else
                prestr = prestr & sPara(i) & "&"
            End if
        Next
        
        CreateLinkstring = prestr
    end function
    
    private function BuildRequestParaToString(sParaTemp)
        Dim sRequestData
        sPara = BuildRequestPara(sParaTemp)
        sRequestData = CreateLinkStringUrlEncode(sPara)
        
        BuildRequestParaToString = sRequestData
    end function
    
    private function Md5Sign(prestr)
        prestr = prestr & partnerKey
        mysign = md5(prestr, pgCharset)
        Md5Sign = mysign
    End function
    
    private function DelStr(Str)
        If IsNull(Str) Or IsEmpty(Str) Then
            Str = ""
        End If
        DelStr  = Replace(Str,";","")
        DelStr  = Replace(DelStr,"'","")
        DelStr  = Replace(DelStr,"&","")
        DelStr  = Replace(DelStr," ","")
        DelStr  = Replace(DelStr,"　","")
        DelStr  = Replace(DelStr,"%20","")
        DelStr  = Replace(DelStr,"--","")
        DelStr  = Replace(DelStr,"==","")
        DelStr  = Replace(DelStr,"<","")
        DelStr  = Replace(DelStr,">","")
        DelStr  = Replace(DelStr,"%","")
    End function
 
    private function Md5Verify(prestr, sign)
        prestr = prestr & partnerKey
        mysign = md5(prestr, pgCharset)
        If mysign = sign Then
            Md5Verify = true
        Else
            Md5Verify = false
        End If
    End function
    
    private function GetDateTime()
        sTime=now()
        sResult = year(sTime)&right("0" & month(sTime),2)&right("0" & day(sTime),2)&right("0" & hour(sTime),2)&right("0" & minute(sTime),2)&right("0" & second(sTime),2)
        GetDateTime = sResult
    End function
    
    private function GetDateTimeFormat()
        sTime=now()
        sResult = year(sTime)&"-"&right("0" & month(sTime),2)&"-"&right("0" & day(sTime),2)&" "&right("0" & hour(sTime),2)&":"&right("0" & minute(sTime),2)&":"&right("0" & second(sTime),2)
        GetDateTimeFormat = sResult
    End function
    
    private function SortPara(sPara)
        Dim nCount
        nCount = ubound(sPara)
        For i = nCount To 0 Step -1
            minmax = sPara( 0 )
            minmaxSlot = 0
            For j = 1 To i
                mark = (sPara( j ) > minmax)
                If mark Then
                    minmax = sPara( j )
                    minmaxSlot = j
                End If
            Next
            If minmaxSlot <> i Then
                temp = sPara( minmaxSlot )
                sPara( minmaxSlot ) = sPara( i )
                sPara( i ) = temp
            End If
        Next
        SortPara = sPara
    end function
    
    '=====================================================================================
    '  MD5
    '=====================================================================================
    
    private Sub Md5Initial()
        BITS_TO_A_BYTE = 8
        BYTES_TO_A_WORD = 4
        BITS_TO_A_WORD = 32
    End Sub
    
    private m_lOnBits(30)
    private m_l2Power(30)
    
    private function LShift(lValue, iShiftBits)
        If iShiftBits = 0 Then
            LShift = lValue
            Exit function
        ElseIf iShiftBits = 31 Then
            If lValue And 1 Then
                LShift = &H80000000
            Else
                LShift = 0
            End If
            Exit function
        ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
            Err.Raise 6
        End If
        
        If (lValue And m_l2Power(31 - iShiftBits)) Then
            LShift = ((lValue And m_lOnBits(31 - (iShiftBits + 1))) * m_l2Power(iShiftBits)) Or &H80000000
        Else
            LShift = ((lValue And m_lOnBits(31 - iShiftBits)) * m_l2Power(iShiftBits))
        End If
    End function
 
    private function str2bin(varstr)
        Dim varasc
        Dim i
        Dim varchar
        Dim varlow
        Dim varhigh
        
        str2bin=""
        For i=1 To Len(varstr)
            varchar=mid(varstr,i,1)
            varasc = Asc(varchar)
            
            If varasc<0 Then
                varasc = varasc + 65535
            End If
            
            If varasc>255 Then
                varlow = Left(Hex(Asc(varchar)),2)
                varhigh = right(Hex(Asc(varchar)),2)
                str2bin = str2bin & chrB("&H" & varlow) & chrB("&H" & varhigh)
            Else
                str2bin = str2bin & chrB(AscB(varchar))
            End If
        Next
    End function
 
    private function str2bin_utf(varstr)
        Dim varchar, code, codearr, j, i
        str2bin_utf = ""
        For i=1 To Len(varstr)
            varchar = Mid(varstr,i,1)
            code = Server.UrlEncode(varchar)
            If(code="+") Then code="%20"
            If Len(code) = 1 Then
               str2bin_utf = str2bin_utf & chrB(AscB(code))
            Else
               codearr = Split(code,"%")
               For j = 1 to UBound(codearr)
                  str2bin_utf = str2bin_utf & ChrB("&H" & codearr(j))
               Next
             End If
        Next
    End function
 
    private function RShift(lValue, iShiftBits)
        If iShiftBits = 0 Then
            RShift = lValue
            Exit function
        ElseIf iShiftBits = 31 Then
            If lValue And &H80000000 Then
                RShift = 1
            Else
                RShift = 0
            End If
            Exit function
        ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
            Err.Raise 6
        End If
        RShift = (lValue And &H7FFFFFFE) m_l2Power(iShiftBits)
        If (lValue And &H80000000) Then
            RShift = (RShift Or (&H40000000 m_l2Power(iShiftBits - 1)))
        End If
    End function
 
    private function RotateLeft(lValue, iShiftBits)
        RotateLeft = LShift(lValue, iShiftBits) Or RShift(lValue, (32 - iShiftBits))
    End function
 
    private function AddUnsigned(lX, lY)
        Dim lX4
        Dim lY4
        Dim lX8
        Dim lY8
        Dim lResult
 
        lX8 = lX And &H80000000
        lY8 = lY And &H80000000
        lX4 = lX And &H40000000
        lY4 = lY And &H40000000
        
        lResult = (lX And &H3FFFFFFF) + (lY And &H3FFFFFFF)
 
        If lX4 And lY4 Then
            lResult = lResult Xor &H80000000 Xor lX8 Xor lY8
        ElseIf lX4 Or lY4 Then
            If lResult And &H40000000 Then
                lResult = lResult Xor &HC0000000 Xor lX8 Xor lY8
            Else
                lResult = lResult Xor &H40000000 Xor lX8 Xor lY8
            End If
        Else
            lResult = lResult Xor lX8 Xor lY8
        End If
 
        AddUnsigned = lResult
    End function
 
    private function md5_F(x, y, z)
        md5_F = (x And y) Or ((Not x) And z)
    End function
 
    private function md5_G(x, y, z)
        md5_G = (x And z) Or (y And (Not z))
    End function
 
    private function md5_H(x, y, z)
        md5_H = (x Xor y Xor z)
    End function
 
    private function md5_I(x, y, z)
        md5_I = (y Xor (x Or (Not z)))
    End function
 
    private Sub md5_FF(a, b, c, d, x, s, ac)
        a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), x), ac))
        a = RotateLeft(a, s)
        a = AddUnsigned(a, b)
    End Sub
 
    private Sub md5_GG(a, b, c, d, x, s, ac)
        a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), x), ac))
        a = RotateLeft(a, s)
        a = AddUnsigned(a, b)
    End Sub
 
    private Sub md5_HH(a, b, c, d, x, s, ac)
        a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), x), ac))
        a = RotateLeft(a, s)
        a = AddUnsigned(a, b)
    End Sub
 
    private Sub md5_II(a, b, c, d, x, s, ac)
        a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), x), ac))
        a = RotateLeft(a, s)
        a = AddUnsigned(a, b)
    End Sub
 
    private function ConvertToWordArray(sMessage)
        Dim lMessageLength
        Dim lNumberOfWords
        Dim lWordArray()
        Dim lBytePosition
        Dim lByteCount
        Dim lWordCount
        
        Const MODULUS_BITS = 512
        Const CONGRUENT_BITS = 448
        
        lMessageLength = LenB(sMessage)
        
        lNumberOfWords = (((lMessageLength + ((MODULUS_BITS - CONGRUENT_BITS) BITS_TO_A_BYTE)) (MODULUS_BITS BITS_TO_A_BYTE)) + 1) * (MODULUS_BITS BITS_TO_A_WORD)
        ReDim lWordArray(lNumberOfWords - 1)
        
        lBytePosition = 0
        lByteCount = 0
        Do Until lByteCount >= lMessageLength
            lWordCount = lByteCount BYTES_TO_A_WORD
            lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
            lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(AscB(MidB(sMessage, lByteCount + 1, 1)), lBytePosition)
            lByteCount = lByteCount + 1
        Loop
 
        lWordCount = lByteCount BYTES_TO_A_WORD
        lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
        
        lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(&H80, lBytePosition)
        
        lWordArray(lNumberOfWords - 2) = LShift(lMessageLength, 3)
        lWordArray(lNumberOfWords - 1) = RShift(lMessageLength, 29)
 
        ConvertToWordArray = lWordArray
    End function
 
    private function WordToHex(lValue)
        Dim lByte
        Dim lCount
        
        For lCount = 0 To 3
            lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) And m_lOnBits(BITS_TO_A_BYTE - 1)
            WordToHex = WordToHex & Right("0" & Hex(lByte), 2)
        Next
    End function
 
    Public function MD5(sMessage, input_charset)
        m_lOnBits(0) = CLng(1)
        m_lOnBits(1) = CLng(3)
        m_lOnBits(2) = CLng(7)
        m_lOnBits(3) = CLng(15)
        m_lOnBits(4) = CLng(31)
        m_lOnBits(5) = CLng(63)
        m_lOnBits(6) = CLng(127)
        m_lOnBits(7) = CLng(255)
        m_lOnBits(8) = CLng(511)
        m_lOnBits(9) = CLng(1023)
        m_lOnBits(10) = CLng(2047)
        m_lOnBits(11) = CLng(4095)
        m_lOnBits(12) = CLng(8191)
        m_lOnBits(13) = CLng(16383)
        m_lOnBits(14) = CLng(32767)
        m_lOnBits(15) = CLng(65535)
        m_lOnBits(16) = CLng(131071)
        m_lOnBits(17) = CLng(262143)
        m_lOnBits(18) = CLng(524287)
        m_lOnBits(19) = CLng(1048575)
        m_lOnBits(20) = CLng(2097151)
        m_lOnBits(21) = CLng(4194303)
        m_lOnBits(22) = CLng(8388607)
        m_lOnBits(23) = CLng(16777215)
        m_lOnBits(24) = CLng(33554431)
        m_lOnBits(25) = CLng(67108863)
        m_lOnBits(26) = CLng(134217727)
        m_lOnBits(27) = CLng(268435455)
        m_lOnBits(28) = CLng(536870911)
        m_lOnBits(29) = CLng(1073741823)
        m_lOnBits(30) = CLng(2147483647)
        
        m_l2Power(0) = CLng(1)
        m_l2Power(1) = CLng(2)
        m_l2Power(2) = CLng(4)
        m_l2Power(3) = CLng(8)
        m_l2Power(4) = CLng(16)
        m_l2Power(5) = CLng(32)
        m_l2Power(6) = CLng(64)
        m_l2Power(7) = CLng(128)
        m_l2Power(8) = CLng(256)
        m_l2Power(9) = CLng(512)
        m_l2Power(10) = CLng(1024)
        m_l2Power(11) = CLng(2048)
        m_l2Power(12) = CLng(4096)
        m_l2Power(13) = CLng(8192)
        m_l2Power(14) = CLng(16384)
        m_l2Power(15) = CLng(32768)
        m_l2Power(16) = CLng(65536)
        m_l2Power(17) = CLng(131072)
        m_l2Power(18) = CLng(262144)
        m_l2Power(19) = CLng(524288)
        m_l2Power(20) = CLng(1048576)
        m_l2Power(21) = CLng(2097152)
        m_l2Power(22) = CLng(4194304)
        m_l2Power(23) = CLng(8388608)
        m_l2Power(24) = CLng(16777216)
        m_l2Power(25) = CLng(33554432)
        m_l2Power(26) = CLng(67108864)
        m_l2Power(27) = CLng(134217728)
        m_l2Power(28) = CLng(268435456)
        m_l2Power(29) = CLng(536870912)
        m_l2Power(30) = CLng(1073741824)
        
        
        Dim x
        Dim k
        Dim AA
        Dim BB
        Dim CC
        Dim DD
        Dim a
        Dim b
        Dim c
        Dim d
        
        Const S11 = 7
        Const S12 = 12
        Const S13 = 17
        Const S14 = 22
        Const S21 = 5
        Const S22 = 9
        Const S23 = 14
        Const S24 = 20
        Const S31 = 4
        Const S32 = 11
        Const S33 = 16
        Const S34 = 23
        Const S41 = 6
        Const S42 = 10
        Const S43 = 15
        Const S44 = 21
        
        If LCase(input_charset) = "utf-8" Then
            x = ConvertToWordArray(str2bin_utf(sMessage))
        Else
            x = ConvertToWordArray(str2bin(sMessage))
        End If
        
        a = &H67452301
        b = &HEFCDAB89
        c = &H98BADCFE
        d = &H10325476
        
        For k = 0 To UBound(x) Step 16
            AA = a
            BB = b
            CC = c
            DD = d
            
            md5_FF a, b, c, d, x(k + 0), S11, &HD76AA478
            md5_FF d, a, b, c, x(k + 1), S12, &HE8C7B756
            md5_FF c, d, a, b, x(k + 2), S13, &H242070DB
            md5_FF b, c, d, a, x(k + 3), S14, &HC1BDCEEE
            md5_FF a, b, c, d, x(k + 4), S11, &HF57C0FAF
            md5_FF d, a, b, c, x(k + 5), S12, &H4787C62A
            md5_FF c, d, a, b, x(k + 6), S13, &HA8304613
            md5_FF b, c, d, a, x(k + 7), S14, &HFD469501
            md5_FF a, b, c, d, x(k + 8), S11, &H698098D8
            md5_FF d, a, b, c, x(k + 9), S12, &H8B44F7AF
            md5_FF c, d, a, b, x(k + 10), S13, &HFFFF5BB1
            md5_FF b, c, d, a, x(k + 11), S14, &H895CD7BE
            md5_FF a, b, c, d, x(k + 12), S11, &H6B901122
            md5_FF d, a, b, c, x(k + 13), S12, &HFD987193
            md5_FF c, d, a, b, x(k + 14), S13, &HA679438E
            md5_FF b, c, d, a, x(k + 15), S14, &H49B40821
            
            md5_GG a, b, c, d, x(k + 1), S21, &HF61E2562
            md5_GG d, a, b, c, x(k + 6), S22, &HC040B340
            md5_GG c, d, a, b, x(k + 11), S23, &H265E5A51
            md5_GG b, c, d, a, x(k + 0), S24, &HE9B6C7AA
            md5_GG a, b, c, d, x(k + 5), S21, &HD62F105D
            md5_GG d, a, b, c, x(k + 10), S22, &H2441453
            md5_GG c, d, a, b, x(k + 15), S23, &HD8A1E681
            md5_GG b, c, d, a, x(k + 4), S24, &HE7D3FBC8
            md5_GG a, b, c, d, x(k + 9), S21, &H21E1CDE6
            md5_GG d, a, b, c, x(k + 14), S22, &HC33707D6
            md5_GG c, d, a, b, x(k + 3), S23, &HF4D50D87
            md5_GG b, c, d, a, x(k + 8), S24, &H455A14ED
            md5_GG a, b, c, d, x(k + 13), S21, &HA9E3E905
            md5_GG d, a, b, c, x(k + 2), S22, &HFCEFA3F8
            md5_GG c, d, a, b, x(k + 7), S23, &H676F02D9
            md5_GG b, c, d, a, x(k + 12), S24, &H8D2A4C8A
            
            md5_HH a, b, c, d, x(k + 5), S31, &HFFFA3942
            md5_HH d, a, b, c, x(k + 8), S32, &H8771F681
            md5_HH c, d, a, b, x(k + 11), S33, &H6D9D6122
            md5_HH b, c, d, a, x(k + 14), S34, &HFDE5380C
            md5_HH a, b, c, d, x(k + 1), S31, &HA4BEEA44
            md5_HH d, a, b, c, x(k + 4), S32, &H4BDECFA9
            md5_HH c, d, a, b, x(k + 7), S33, &HF6BB4B60
            md5_HH b, c, d, a, x(k + 10), S34, &HBEBFBC70
            md5_HH a, b, c, d, x(k + 13), S31, &H289B7EC6
            md5_HH d, a, b, c, x(k + 0), S32, &HEAA127FA
            md5_HH c, d, a, b, x(k + 3), S33, &HD4EF3085
            md5_HH b, c, d, a, x(k + 6), S34, &H4881D05
            md5_HH a, b, c, d, x(k + 9), S31, &HD9D4D039
            md5_HH d, a, b, c, x(k + 12), S32, &HE6DB99E5
            md5_HH c, d, a, b, x(k + 15), S33, &H1FA27CF8
            md5_HH b, c, d, a, x(k + 2), S34, &HC4AC5665
            
            md5_II a, b, c, d, x(k + 0), S41, &HF4292244
            md5_II d, a, b, c, x(k + 7), S42, &H432AFF97
            md5_II c, d, a, b, x(k + 14), S43, &HAB9423A7
            md5_II b, c, d, a, x(k + 5), S44, &HFC93A039
            md5_II a, b, c, d, x(k + 12), S41, &H655B59C3
            md5_II d, a, b, c, x(k + 3), S42, &H8F0CCC92
            md5_II c, d, a, b, x(k + 10), S43, &HFFEFF47D
            md5_II b, c, d, a, x(k + 1), S44, &H85845DD1
            md5_II a, b, c, d, x(k + 8), S41, &H6FA87E4F
            md5_II d, a, b, c, x(k + 15), S42, &HFE2CE6E0
            md5_II c, d, a, b, x(k + 6), S43, &HA3014314
            md5_II b, c, d, a, x(k + 13), S44, &H4E0811A1
            md5_II a, b, c, d, x(k + 4), S41, &HF7537E82
            md5_II d, a, b, c, x(k + 11), S42, &HBD3AF235
            md5_II c, d, a, b, x(k + 2), S43, &H2AD7D2BB
            md5_II b, c, d, a, x(k + 9), S44, &HEB86D391
            
            a = AddUnsigned(a, AA)
            b = AddUnsigned(b, BB)
            c = AddUnsigned(c, CC)
            d = AddUnsigned(d, DD)
        Next
        
        MD5 = LCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))
    End function
end class

创建表单

set alipay = new AlipayClass
alipay.notifyUrl    = ""     &nb