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主程序共三個(gè)

我的調(diào)用方式 script language="javascript" src="/verify/num.asp">/script>
驗(yàn)證方式 if trim(Loginnum)>trim(session("Loginnum")) then
Response.Write Error("驗(yàn)證碼錯(cuò)誤！")
Response.End
end if

num.asp

%
'### To encrypt/decrypt include this code in your page
'### strMyEncryptedString = EncryptString(strString)
'### strMyDecryptedString = DeCryptString(strMyEncryptedString)
'### You are free to use this code as long as credits remain in place
'### also if you improve this code let me know.

Private Function EncryptString(strString)
'####################################################################
'### Crypt Function ? 2001 by Slavic Kozyuk grindkore@yahoo.com ###
'### Arguments: strString --- String you wish to encrypt ###
'### Output: Encrypted HEX string ###
'####################################################################

Dim CharHexSet, intStringLen, strTemp, strRAW, I, intKey, intOffSet
Randomize Timer

intKey = Round((RND * 1000000) + 1000000) '##### Key Bitsize
intOffSet = Round((RND * 1000000) + 1000000) '##### KeyOffSet Bitsize

If IsNull(strString) = False Then
strRAW = strString
intStringLen = Len(strRAW)

For i = 0 to intStringLen - 1
strTemp = Left(strRAW, 1)
strRAW = Right(strRAW, Len(strRAW) - 1)
CharHexSet = CharHexSet  Hex(Asc(strTemp) * intKey) Hex(intKey)
Next

EncryptString = CharHexSet  "|"  Hex(intOffSet + intKey)  "|"  Hex(intOffSet)
Else
EncryptString = ""
End If
End Function

Private Function DeCryptString(strCryptString)
'####################################################################
'### Crypt Function ? 2001 by Slavic Kozyuk grindkore@yahoo.com ###
'### Arguments: Encrypted HEX stringt ###
'### Output: Decrypted ASCII string ###
'####################################################################
'### Note this function uses HexConv() and get_hxno() functions ###
'### so make sure they are not removed ###
'####################################################################

Dim strRAW, arHexCharSet, I, intKey, intOffSet, strRawKey, strHexCrypData

strRawKey = Right(strCryptString, Len(strCryptString) - InStr(strCryptString, "|"))
intOffSet = Right(strRawKey, Len(strRawKey) - InStr(strRawKey,"|"))
intKey = HexConv(Left(strRawKey, InStr(strRawKey, "|") - 1)) - HexConv(intOffSet)
strHexCrypData = Left(strCryptString, Len(strCryptString) - (Len(strRawKey) + 1))

arHexCharSet = Split(strHexCrypData, Hex(intKey))

For i=0 to Ubound(arHexCharSet)
strRAW = strRAW  Chr(HexConv(arHexCharSet(i))/intKey)
Next

DeCryptString = strRAW
End Function

Private Function HexConv(hexVar)
Dim hxx, hxx_var, multiply
IF hexVar > "" THEN
hexVar = UCASE(hexVar)
hexVar = StrReverse(hexVar)
DIM hx()
REDIM hx(LEN(hexVar))
hxx = 0
hxx_var = 0
FOR hxx = 1 TO LEN(hexVar)
IF multiply = "" THEN multiply = 1
hx(hxx) = mid(hexVar,hxx,1)
hxx_var = (get_hxno(hx(hxx)) * multiply) + hxx_var
multiply = (multiply * 16)
NEXT
hexVar = hxx_var
HexConv = hexVar
END IF
End Function

Private Function get_hxno(ghx)
If ghx = "A" Then
ghx = 10
ElseIf ghx = "B" Then
ghx = 11
ElseIf ghx = "C" Then
ghx = 12
ElseIf ghx = "D" Then
ghx = 13
ElseIf ghx = "E" Then
ghx = 14
ElseIf ghx = "F" Then
ghx = 15
End If
get_hxno = ghx
End Function

randomize
num = int(7999*rnd+2000) '計(jì)數(shù)器的值
num2 = EncryptString(num)
session("Loginnum")=num
%>
document.write("img src='/verify/count.asp?sksid=%=num2%>'>") ' 這里是調(diào)用圖片的路徑

count.asp

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