d:\wwwroot\wuchunhua\admin\md5.asp
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Private Const BITS_TO_A_BYTE = 8
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Private Const BYTES_TO_A_WORD = 4
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Private Const BITS_TO_A_WORD = 32
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Private m_lOnBits(30)
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Private m_l2Power(30)
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Private Function LShift(lValue, iShiftBits)
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If iShiftBits = 0 Then
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LShift = lValue
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Exit Function
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ElseIf iShiftBits = 31 Then
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If lValue And 1 Then
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LShift = &H80000000
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Else
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LShift = 0
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End If
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Exit Function
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ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
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Err.Raise 6
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End If
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If (lValue And m_l2Power(31 - iShiftBits)) Then
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LShift = ((lValue And m_lOnBits(31 - (iShiftBits + 1))) * m_l2Power(iShiftBits)) Or &H80000000
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Else
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LShift = ((lValue And m_lOnBits(31 - iShiftBits)) * m_l2Power(iShiftBits))
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End If
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End Function
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030:
Private Function RShift(lValue, iShiftBits)
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If iShiftBits = 0 Then
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RShift = lValue
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Exit Function
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ElseIf iShiftBits = 31 Then
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If lValue And &H80000000 Then
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RShift = 1
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Else
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RShift = 0
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End If
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Exit Function
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ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
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Err.Raise 6
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End If
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RShift = (lValue And &H7FFFFFFE) \ m_l2Power(iShiftBits)
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If (lValue And &H80000000) Then
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RShift = (RShift Or (&H40000000 \ m_l2Power(iShiftBits - 1)))
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End If
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End Function
051:
052:
Private Function RotateLeft(lValue, iShiftBits)
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RotateLeft = LShift(lValue, iShiftBits) Or RShift(lValue, (32 - iShiftBits))
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End Function
055:
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Private Function AddUnsigned(lX, lY)
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Dim lX4
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Dim lY4
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Dim lX8
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Dim lY8
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Dim lResult
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lX8 = lX And &H80000000
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lY8 = lY And &H80000000
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lX4 = lX And &H40000000
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lY4 = lY And &H40000000
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lResult = (lX And &H3FFFFFFF) + (lY And &H3FFFFFFF)
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If lX4 And lY4 Then
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lResult = lResult Xor &H80000000 Xor lX8 Xor lY8
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ElseIf lX4 Or lY4 Then
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If lResult And &H40000000 Then
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lResult = lResult Xor &HC0000000 Xor lX8 Xor lY8
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Else
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lResult = lResult Xor &H40000000 Xor lX8 Xor lY8
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End If
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Else
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lResult = lResult Xor lX8 Xor lY8
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End If
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AddUnsigned = lResult
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End Function
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Private Function md5_F(x, y, z)
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md5_F = (x And y) Or ((Not x) And z)
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End Function
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Private Function md5_G(x, y, z)
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md5_G = (x And z) Or (y And (Not z))
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End Function
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Private Function md5_H(x, y, z)
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md5_H = (x Xor y Xor z)
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End Function
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Private Function md5_I(x, y, z)
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md5_I = (y Xor (x Or (Not z)))
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End Function
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Private Sub md5_FF(a, b, c, d, x, s, ac)
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a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), x), ac))
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a = RotateLeft(a, s)
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a = AddUnsigned(a, b)
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End Sub
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Private Sub md5_GG(a, b, c, d, x, s, ac)
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a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), x), ac))
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a = RotateLeft(a, s)
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a = AddUnsigned(a, b)
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End Sub
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Private Sub md5_HH(a, b, c, d, x, s, ac)
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a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), x), ac))
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a = RotateLeft(a, s)
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a = AddUnsigned(a, b)
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End Sub
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Private Sub md5_II(a, b, c, d, x, s, ac)
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a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), x), ac))
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a = RotateLeft(a, s)
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a = AddUnsigned(a, b)
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End Sub
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Private Function ConvertToWordArray(sMessage)
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Dim lMessageLength
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Dim lNumberOfWords
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Dim lWordArray()
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Dim lBytePosition
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Dim lByteCount
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Dim lWordCount
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Const MODULUS_BITS = 512
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Const CONGRUENT_BITS = 448
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lMessageLength = Len(sMessage)
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lNumberOfWords = (((lMessageLength + ((MODULUS_BITS - CONGRUENT_BITS) \ BITS_TO_A_BYTE)) \ (MODULUS_BITS \ BITS_TO_A_BYTE)) + 1) * (MODULUS_BITS \ BITS_TO_A_WORD)
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ReDim lWordArray(lNumberOfWords - 1)
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lBytePosition = 0
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lByteCount = 0
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Do Until lByteCount >= lMessageLength
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lWordCount = lByteCount \ BYTES_TO_A_WORD
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lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
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lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(Asc(Mid(sMessage, lByteCount + 1, 1)), lBytePosition)
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lByteCount = lByteCount + 1
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Loop
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lWordCount = lByteCount \ BYTES_TO_A_WORD
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lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
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lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(&H80, lBytePosition)
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lWordArray(lNumberOfWords - 2) = LShift(lMessageLength, 3)
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lWordArray(lNumberOfWords - 1) = RShift(lMessageLength, 29)
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ConvertToWordArray = lWordArray
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End Function
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Private Function WordToHex(lValue)
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Dim lByte
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Dim lCount
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For lCount = 0 To 3
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lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) And m_lOnBits(BITS_TO_A_BYTE - 1)
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WordToHex = WordToHex & Right("0" & Hex(lByte), 2)
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Next
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End Function
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Public Function MD5(sMessage)
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m_lOnBits(0) = CLng(1)
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m_lOnBits(1) = CLng(3)
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m_lOnBits(2) = CLng(7)
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m_lOnBits(3) = CLng(15)
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m_lOnBits(4) = CLng(31)
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m_lOnBits(5) = CLng(63)
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m_lOnBits(6) = CLng(127)
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m_lOnBits(7) = CLng(255)
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m_lOnBits(8) = CLng(511)
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m_lOnBits(9) = CLng(1023)
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m_lOnBits(10) = CLng(2047)
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m_lOnBits(11) = CLng(4095)
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m_lOnBits(12) = CLng(8191)
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m_lOnBits(13) = CLng(16383)
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m_lOnBits(14) = CLng(32767)
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m_lOnBits(15) = CLng(65535)
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m_lOnBits(16) = CLng(131071)
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m_lOnBits(17) = CLng(262143)
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m_lOnBits(18) = CLng(524287)
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m_lOnBits(19) = CLng(1048575)
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m_lOnBits(20) = CLng(2097151)
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m_lOnBits(21) = CLng(4194303)
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m_lOnBits(22) = CLng(8388607)
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m_lOnBits(23) = CLng(16777215)
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m_lOnBits(24) = CLng(33554431)
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m_lOnBits(25) = CLng(67108863)
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m_lOnBits(26) = CLng(134217727)
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m_lOnBits(27) = CLng(268435455)
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m_lOnBits(28) = CLng(536870911)
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m_lOnBits(29) = CLng(1073741823)
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m_lOnBits(30) = CLng(2147483647)
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m_l2Power(0) = CLng(1)
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m_l2Power(1) = CLng(2)
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m_l2Power(2) = CLng(4)
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m_l2Power(3) = CLng(8)
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m_l2Power(4) = CLng(16)
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m_l2Power(5) = CLng(32)
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m_l2Power(6) = CLng(64)
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m_l2Power(7) = CLng(128)
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m_l2Power(8) = CLng(256)
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m_l2Power(9) = CLng(512)
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m_l2Power(10) = CLng(1024)
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m_l2Power(11) = CLng(2048)
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m_l2Power(12) = CLng(4096)
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m_l2Power(13) = CLng(8192)
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m_l2Power(14) = CLng(16384)
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m_l2Power(15) = CLng(32768)
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m_l2Power(16) = CLng(65536)
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m_l2Power(17) = CLng(131072)
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m_l2Power(18) = CLng(262144)
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m_l2Power(19) = CLng(524288)
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m_l2Power(20) = CLng(1048576)
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m_l2Power(21) = CLng(2097152)
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m_l2Power(22) = CLng(4194304)
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m_l2Power(23) = CLng(8388608)
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m_l2Power(24) = CLng(16777216)
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m_l2Power(25) = CLng(33554432)
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m_l2Power(26) = CLng(67108864)
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m_l2Power(27) = CLng(134217728)
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m_l2Power(28) = CLng(268435456)
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m_l2Power(29) = CLng(536870912)
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m_l2Power(30) = CLng(1073741824)
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Dim x
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Dim k
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Dim AA
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Dim BB
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Dim CC
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Dim DD
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Dim a
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Dim b
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Dim c
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Dim d
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Const S11 = 7
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Const S12 = 12
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Const S13 = 17
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Const S14 = 22
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Const S21 = 5
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Const S22 = 9
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Const S23 = 14
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Const S24 = 20
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Const S31 = 4
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Const S32 = 11
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Const S33 = 16
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Const S34 = 23
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Const S41 = 6
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Const S42 = 10
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Const S43 = 15
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Const S44 = 21
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x = ConvertToWordArray(sMessage)
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a = &H67452301
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b = &HEFCDAB89
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c = &H98BADCFE
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d = &H10325476
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For k = 0 To UBound(x) Step 16
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AA = a
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BB = b
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CC = c
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DD = d
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md5_FF a, b, c, d, x(k + 0), S11, &HD76AA478
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md5_FF d, a, b, c, x(k + 1), S12, &HE8C7B756
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md5_FF c, d, a, b, x(k + 2), S13, &H242070DB
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md5_FF b, c, d, a, x(k + 3), S14, &HC1BDCEEE
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md5_FF a, b, c, d, x(k + 4), S11, &HF57C0FAF
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md5_FF d, a, b, c, x(k + 5), S12, &H4787C62A
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md5_FF c, d, a, b, x(k + 6), S13, &HA8304613
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md5_FF b, c, d, a, x(k + 7), S14, &HFD469501
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md5_FF a, b, c, d, x(k + 8), S11, &H698098D8
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md5_FF d, a, b, c, x(k + 9), S12, &H8B44F7AF
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md5_FF c, d, a, b, x(k + 10), S13, &HFFFF5BB1
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md5_FF b, c, d, a, x(k + 11), S14, &H895CD7BE
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md5_FF a, b, c, d, x(k + 12), S11, &H6B901122
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md5_FF d, a, b, c, x(k + 13), S12, &HFD987193
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md5_FF c, d, a, b, x(k + 14), S13, &HA679438E
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md5_FF b, c, d, a, x(k + 15), S14, &H49B40821
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md5_GG a, b, c, d, x(k + 1), S21, &HF61E2562
296:
md5_GG d, a, b, c, x(k + 6), S22, &HC040B340
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md5_GG c, d, a, b, x(k + 11), S23, &H265E5A51
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md5_GG b, c, d, a, x(k + 0), S24, &HE9B6C7AA
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md5_GG a, b, c, d, x(k + 5), S21, &HD62F105D
300:
md5_GG d, a, b, c, x(k + 10), S22, &H2441453
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md5_GG c, d, a, b, x(k + 15), S23, &HD8A1E681
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md5_GG b, c, d, a, x(k + 4), S24, &HE7D3FBC8
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md5_GG a, b, c, d, x(k + 9), S21, &H21E1CDE6
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md5_GG d, a, b, c, x(k + 14), S22, &HC33707D6
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md5_GG c, d, a, b, x(k + 3), S23, &HF4D50D87
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md5_GG b, c, d, a, x(k + 8), S24, &H455A14ED
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md5_GG a, b, c, d, x(k + 13), S21, &HA9E3E905
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md5_GG d, a, b, c, x(k + 2), S22, &HFCEFA3F8
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md5_GG c, d, a, b, x(k + 7), S23, &H676F02D9
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md5_GG b, c, d, a, x(k + 12), S24, &H8D2A4C8A
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md5_HH a, b, c, d, x(k + 5), S31, &HFFFA3942
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md5_HH d, a, b, c, x(k + 8), S32, &H8771F681
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md5_HH c, d, a, b, x(k + 11), S33, &H6D9D6122
315:
md5_HH b, c, d, a, x(k + 14), S34, &HFDE5380C
316:
md5_HH a, b, c, d, x(k + 1), S31, &HA4BEEA44
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md5_HH d, a, b, c, x(k + 4), S32, &H4BDECFA9
318:
md5_HH c, d, a, b, x(k + 7), S33, &HF6BB4B60
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md5_HH b, c, d, a, x(k + 10), S34, &HBEBFBC70
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md5_HH a, b, c, d, x(k + 13), S31, &H289B7EC6
321:
md5_HH d, a, b, c, x(k + 0), S32, &HEAA127FA
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md5_HH c, d, a, b, x(k + 3), S33, &HD4EF3085
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md5_HH b, c, d, a, x(k + 6), S34, &H4881D05
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md5_HH a, b, c, d, x(k + 9), S31, &HD9D4D039
325:
md5_HH d, a, b, c, x(k + 12), S32, &HE6DB99E5
326:
md5_HH c, d, a, b, x(k + 15), S33, &H1FA27CF8
327:
md5_HH b, c, d, a, x(k + 2), S34, &HC4AC5665
328:
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md5_II a, b, c, d, x(k + 0), S41, &HF4292244
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md5_II d, a, b, c, x(k + 7), S42, &H432AFF97
331:
md5_II c, d, a, b, x(k + 14), S43, &HAB9423A7
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md5_II b, c, d, a, x(k + 5), S44, &HFC93A039
333:
md5_II a, b, c, d, x(k + 12), S41, &H655B59C3
334:
md5_II d, a, b, c, x(k + 3), S42, &H8F0CCC92
335:
md5_II c, d, a, b, x(k + 10), S43, &HFFEFF47D
336:
md5_II b, c, d, a, x(k + 1), S44, &H85845DD1
337:
md5_II a, b, c, d, x(k + 8), S41, &H6FA87E4F
338:
md5_II d, a, b, c, x(k + 15), S42, &HFE2CE6E0
339:
md5_II c, d, a, b, x(k + 6), S43, &HA3014314
340:
md5_II b, c, d, a, x(k + 13), S44, &H4E0811A1
341:
md5_II a, b, c, d, x(k + 4), S41, &HF7537E82
342:
md5_II d, a, b, c, x(k + 11), S42, &HBD3AF235
343:
md5_II c, d, a, b, x(k + 2), S43, &H2AD7D2BB
344:
md5_II b, c, d, a, x(k + 9), S44, &HEB86D391
345:
346:
a = AddUnsigned(a, AA)
347:
b = AddUnsigned(b, BB)
348:
c = AddUnsigned(c, CC)
349:
d = AddUnsigned(d, DD)
350:
Next
351:
352:
'MD5 = LCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))
353:
MD5=LCase(WordToHex(b) & WordToHex(c)) 'I crop this to fit 16byte database password :D
354:
End Function
%
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