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ASP版本支付宝接口类(优化版)

来源:中文源码网    浏览:427 次    日期:2024-03-28 08:14:49
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,XX@XX.com"
         
        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 & "" & 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

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