asp生成不需要数据库的中奖码

答案：恭喜您，您中奖了，你的中奖码是（请牢记，领奖需要）：ＸＸＸＸＸＸＸＸＸＸＸ 
然后用户输入ＸＸＸＸＸＸＸＸＸＸＸ，简单验证后就可以领奖了。 

你使用过这样的功能，或者有没有想开发一个这样的功能呢？ 
有一个思路是：将一批唯一中奖码，录入的到数据库，中奖时，取出来一条，做一个标记，把中奖码告诉 
用户。 
但是这样要先将一批中奖码录入到数据库中，有没有其他方法呢？ 
比如：200807151054281502895e585d7e4b529e，能不能做到：不到数据库中查询验证就可以确认这个中奖 
码是不是有效（不是伪造）的呢？ 
我有一个思路，如果愿意，请听我说一下：） 
比如这个中奖码：200807151054281502895e585d7e4b529e 
他有三部分组成 
20080715105428　1502　895e585d7e4b529e 
20080715105428 是年月日时分秒YYYYMMDDhhmmss 
1502 是四位随机数，防止第一部分重复 
895e585d7e4b529e　前两部分+PrivateKey的 MD5 16位的值 
一句话：中奖码的前18位和后16位是有关系的 
这样，只要别人猜不到你的PrivateKey，就伪造不了你的中奖码。 
不足之处，这个中奖码长了点：（ 
  
代码如下： 
getkey()　返回一个唯一的中奖码 
ckkey(s) 验证中奖码是否有奖 
[复制此代码]CODE:
 
<% 
Private Const BITS_TO_A_BYTE = 8 
Private Const BYTES_TO_A_WORD = 4 
Private Const BITS_TO_A_WORD = 32 
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 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 = Len(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(Asc(Mid(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) 
    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)

上一个：asp遍历目录及子目录的函数
下一个：asp下的一个检测链接是否正常的函数