主程序共三個
我的調用方式 <script language="javascript" src="/verify/num.asp"></script>
驗證方式 if trim(Loginnum)<>trim(session("Loginnum")) then
Response.Write Error("驗證碼錯誤！")
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) '計數器的值
num2 = EncryptString(num)
session("Loginnum")=num
%>
document.write("<img src='/verify/count.asp?sksid=<%=num2%>'>") ' 這里是調用圖片的路徑
count.asp
<!--#include file="numimg.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
%>
<%
Dim Image
Dim Width, Height
Dim num
Dim digtal
Dim Length
Dim sort
Length = 4 '自定計數器長度
Redim sort( Length )
num=cint(DeCryptString(request.querystring("sksid")))
digital = ""
For I = 1 To Length -Len( num ) '補0
digital = digital & "0"
Next
For I = 1 To Len( num )
digital = digital & Mid( num, I, 1 )
Next
For I = 1 To Len( digital )
sort(I) = Mid( digital, I, 1 )
Next
Width = 8 * Len( digital ) '圖像的寬度
Height = 10 '圖像的高度，在本例中為固定值
Response.ContentType="image/x-xbitmap"
hc=chr(13) & chr(10)
Image = "#define counter_width " & Width & hc
Image = Image & "#define counter_height " & Height & hc
Image = Image & "static unsigned char counter_bits[]={" & hc
For I = 1 To Height
For J = 1 To Length
Image = Image & a(sort(J),I) & ","
Next
Next
Image = Left( Image, Len( Image ) - 1 ) '去掉最后一個逗號
Image = Image & "};" & hc
%>
<%
Response.Write Image
%>
numimg.asp
<%
Dim a(10,10)
a(0,1) = "0x3c" '數字0
a(0,2) = "0x66"
a(0,3) = "0xc3"
a(0,4) = "0xc3"
a(0,5) = "0xc3"
a(0,6) = "0xc3"
a(0,7) = "0xc3"
a(0,8) = "0xc3"
a(0,9) = "0x66"
a(0,10)= "0x3c"
a(1,1) = "0x18" '數字1
a(1,2) = "0x1c"
a(1,3) = "0x18"
a(1,4) = "0x18"
a(1,5) = "0x18"
a(1,6) = "0x18"
a(1,7) = "0x18"
a(1,8) = "0x18"
a(1,9) = "0x18"
a(0,10)= "0x7e"
a(2,1) = "0x3c" '數字2
a(2,2) = "0x66"
a(2,3) = "0x60"
a(2,4) = "0x60"
a(2,5) = "0x30"
a(2,6) = "0x18"
a(2,7) = "0x0c"
a(2,8) = "0x06"
a(2,9) = "0x06"
a(2,10)= "0x7e"
a(3,1) = "0x3c" '數字3
a(3,2) = "0x66"
a(3,3) = "0xc0"
a(3,4) = "0x60"
a(3,5) = "0x1c"
a(3,6) = "0x60"
a(3,7) = "0xc0"
a(3,8) = "0xc0"
a(3,9) = "0x66"
a(3,10)= "0x38"
a(4,1) = "0x38" '數字4
a(4,2) = "0x3c"
a(4,3) = "0x36"
a(4,4) = "0x33"
a(4,5) = "0x33"
a(4,6) = "0x33"
a(4,7) = "0xff"
a(4,8) = "0x30"
a(4,9) = "0x30"
a(4,10)= "0xfe"
a(5,1) = "0xfe" '數字5
a(5,2) = "0xfe"
a(5,3) = "0x06"
a(5,4) = "0x06"
a(5,5) = "0x3e"
a(5,6) = "0x60"
a(5,7) = "0xc0"
a(5,8) = "0xc3"
a(5,9) = "0x66"
a(5,10)= "0x3c"
a(6,1) = "0x60" '數字6
a(6,2) = "0x30"
a(6,3) = "0x18"
a(6,4) = "0x0c"
a(6,5) = "0x3e"
a(6,6) = "0x63"
a(6,7) = "0xc3"
a(6,8) = "0xc3"
a(6,9) = "0x66"
a(6,10) ="0x3c"
a(7,1) = "0xff" '數字7
a(7,2) = "0xc0"
a(7,3) = "0x60"
a(7,4) = "0x30"
a(7,5) = "0x18"
a(7,6) = "0x18"
a(7,7) = "0x18"
a(7,8) = "0x18"
a(7,9) = "0x18"
a(7,10)= "0x18"
a(8,1) = "0x3c" '數字8
a(8,2) = "0x66"
a(8,3) = "0xc3"
a(8,4) = "0x66"
a(8,5) = "0x3c"
a(8,6) = "0x66"
a(8,7) = "0xc3"
a(8,8) = "0xc3"
a(8,9) = "0x66"
a(8,10)= "0x3c"
a(9,1) = "0x3c" '數字9
a(9,2) = "0x66"
a(9,3) = "0xc3"
a(9,4) = "0xc3"
a(9,5) = "0x66"
a(9,6) = "0x3c"
a(9,7) = "0x18"
a(9,8) = "0x0c"
a(9,9) = "0x06"
a(9,10)= "0x03"
%>
-----------------------------------------------------------------------------------
icech將以上的程序根據實際的要求做了一點點的修改。因為我在使用這段程序中，發現XBM只能顯示黑白兩種顏色，0代表白色，1代表黑色，因此將以上1~9的數字進行轉換，將0變為1，1變為0，就可以制作出一個黑底白字的隨機數XBM圖像。
<%
Dim b(10,10)
b(0,1) = "0xc3" '數字0
b(0,2) = "0x99"
b(0,3) = "0x3c"
b(0,4) = "0x3c"
b(0,5) = "0x3c"
b(0,6) = "0x3c"
b(0,7) = "0x3c"
b(0,8) = "0x3c"
b(0,9) = "0x99"
b(0,10)= "0xc3"
b(1,1) = "0xe7" '數字1
b(1,2) = "0xe3"
b(1,3) = "0xe7"
b(1,4) = "0xe7"
b(1,5) = "0xe7"
b(1,6) = "0xe7"
b(1,7) = "0xe7"
b(1,8) = "0xe7"
b(1,9) = "0xe7"
b(0,10)= "0x81"
b(2,1) = "0xc3" '數字2
b(2,2) = "0x99"
b(2,3) = "0x9f"
b(2,4) = "0x9f"
b(2,5) = "0xcf"
b(2,6) = "0xe7"
b(2,7) = "0xf3"
b(2,8) = "0xf9"
b(2,9) = "0xf9"
b(2,10)= "0x81"
b(3,1) = "0xc3" '數字3
b(3,2) = "0x99"
b(3,3) = "0x3f"
b(3,4) = "0x9f"
b(3,5) = "0xe3"
b(3,6) = "0x9f"
b(3,7) = "0x3f"
b(3,8) = "0x3f"
b(3,9) = "0x99"
b(3,10)= "0xc7"
b(4,1) = "0xc7" '數字4
b(4,2) = "0xc3"
b(4,3) = "0xc9"
b(4,4) = "0xcc"
b(4,5) = "0xcc"
b(4,6) = "0xcc"
b(4,7) = "0x00"
b(4,8) = "0xcf"
b(4,9) = "0xcf"
b(4,10)= "0x01"
b(5,1) = "0x01" '數字5
b(5,2) = "0x01"
b(5,3) = "0xf9"
b(5,4) = "0xf9"
b(5,5) = "0xc1"
b(5,6) = "0x9f"
b(5,7) = "0x3f"
b(5,8) = "0x3c"
b(5,9) = "0x99"
b(5,10)= "0xc3"
b(6,1) = "0x9f" '數字6
b(6,2) = "0xcf"
b(6,3) = "0xef"
b(6,4) = "0xf3"
b(6,5) = "0xc1"
b(6,6) = "0x9c"
b(6,7) = "0x3c"
b(6,8) = "0x3c"
b(6,9) = "0x99"
b(6,10) ="0xc3"
b(7,1) = "0x00" '數字7
b(7,2) = "0x3f"
b(7,3) = "0x9f"
b(7,4) = "0xcf"
b(7,5) = "0xe7"
b(7,6) = "0xe7"
b(7,7) = "0xe7"
b(7,8) = "0xe7"
b(7,9) = "0xe7"
b(7,10)= "0xe7"
b(8,1) = "0xc3" '數字8
b(8,2) = "0x99"
b(8,3) = "0x3c"
b(8,4) = "0x99"
b(8,5) = "0xc3"
b(8,6) = "0x99"
b(8,7) = "0x3c"
b(8,8) = "0x3c"
b(8,9) = "0x99"
b(8,10)= "0xc3"
b(9,1) = "0xc3" '數字9
b(9,2) = "0x99"
b(9,3) = "0x3c"
b(9,4) = "0x3c"
b(9,5) = "0x99"
b(9,6) = "0xc3"
b(9,7) = "0xe7"
b(9,8) = "0xf3"
b(9,9) = "0xf9"
b(9,10)= "0xf7"
%>
這樣就可以了，多想想就會做出你所需要的。
