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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)

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

x = ConvertToWordArray(sMessage)

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

if mdfive=16 then

MD5=LCase(WordToHex(b) & WordToHex(c))

else

MD5=UCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))

end if

End Function

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