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Namespace D
Public Class MD5
Private Const BITS_TO_A_BYTE As Integer = 8
Private Const BYTES_TO_A_WORD As Integer = 4
Private Const BITS_TO_A_WORD As Integer = 32
Private Shared m_lOnBits(30) As Long
Private Shared m_l2Power(30) As Long
Public Shared Function LShift(ByVal lValue As Long, ByVal iShiftBits As Integer) As Long
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
Public Shared Function RShift(ByVal lValue As Long, ByVal iShiftBits As Integer) As Long
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
Public Shared Function RotateLeft(ByVal lValue As Long, ByVal iShiftBits As Integer) As Long
RotateLeft = LShift(lValue, iShiftBits) Or RShift(lValue, (32 - iShiftBits))
End Function
Private Shared Function AddUnsigned(ByVal lX As Long, ByVal lY As Long) As Long
Dim lX4 As Long
Dim lY4 As Long
Dim lX8 As Long
Dim lY8 As Long
Dim lResult As Long
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 Shared Function md5_F(ByVal x As Long, ByVal y As Long, ByVal z As Long) As Long
md5_F = (x And y) Or ((Not x) And z)
End Function
Private Shared Function md5_G(ByVal x As Long, ByVal y As Long, ByVal z As Long) As Long
md5_G = (x And z) Or (y And (Not z))
End Function
Private Shared Function md5_H(ByVal x As Long, ByVal y As Long, ByVal z As Long) As Long
md5_H = (x Xor y Xor z)
End Function
Private Shared Function md5_I(ByVal x As Long, ByVal y As Long, ByVal z As Long) As Long
md5_I = (y Xor (x Or (Not z)))
End Function
Private Shared Sub md5_FF(ByRef a As Long, ByVal b As Long, ByVal c As Long, ByVal d As Long, ByVal x As Long, ByVal s As Long, ByVal ac As Long)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Shared Sub md5_GG(ByRef a As Long, ByVal b As Long, ByVal c As Long, ByVal d As Long, ByVal x As Long, ByVal s As Long, ByVal ac As Long)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Shared Sub md5_HH(ByRef a As Long, ByVal b As Long, ByVal c As Long, ByVal d As Long, ByVal x As Long, ByVal s As Long, ByVal ac As Long)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Shared Sub md5_II(ByRef a As Long, ByVal b As Long, ByVal c As Long, ByVal d As Long, ByVal x As Long, ByVal s As Long, ByVal ac As Long)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Shared Function ConvertToWordArray(ByVal sMessage As String)
Dim lMessageLength As Integer
Dim lNumberOfWords As Integer
Dim lWordArray() As Long
Dim lBytePosition As Integer
Dim lByteCount As Integer
Dim lWordCount As Integer
Const MODULUS_BITS As Long = 512
Const CONGRUENT_BITS As Long = 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
Public Shared Function WordToHex(ByVal lValue As Long)
Dim lByte As Long
Dim lCount As Long
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 Shared Function Encrypt(ByVal sMessage As String, ByVal stype As Integer)
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() As Long
Dim k As Integer
Dim AA As Integer
Dim BB As Integer
Dim CC As Integer
Dim DD As Integer
Dim a As Integer
Dim b As Integer
Dim c As Integer
Dim d As Integer
Const S11 As Integer = 7
Const S12 As Integer = 12
Const S13 As Integer = 17
Const S14 As Integer = 22
Const S21 As Integer = 5
Const S22 As Integer = 9
Const S23 As Integer = 14
Const S24 As Integer = 20
Const S31 As Integer = 4
Const S32 As Integer = 11
Const S33 As Integer = 16
Const S34 As Integer = 23
Const S41 As Integer = 6
Const S42 As Integer = 10
Const S43 As Integer = 15
Const S44 As Integer = 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)
Console.WriteLine(a)
a = AddUnsigned(a, AA)
b = AddUnsigned(b, BB)
c = AddUnsigned(c, CC)
d = AddUnsigned(d, DD)
Next
If stype = 32 Then
Encrypt = LCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))
Else
Encrypt = LCase(WordToHex(b) & WordToHex(c))
End If
End Function
End Class
End Namespace
