Buka MS. Visual Basic Anda => Project
exe
Option Explicit
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Private Const OFFSET_4 =
4294967296#
Private Const MAXINT_4 =
2147483647
Private State(4) As Long
Private ByteCounter As Long
Private ByteBuffer(63) As Byte
Private Const S11 = 7
Private Const S12 = 12
Private Const S13 = 17
Private Const S14 = 22
Private Const S21 = 5
Private Const S22 = 9
Private Const S23 = 14
Private Const S24 = 20
Private Const S31 = 4
Private Const S32 = 11
Private Const S33 = 16
Private Const S34 = 23
Private Const S41 = 6
Private Const S42 = 10
Private Const S43 = 15
Private Const S44 = 21
Property Get RegisterA() As
String
RegisterA = State(1)
End Property
Property Get RegisterB() As
String
RegisterB = State(2)
End Property
Property Get RegisterC() As
String
RegisterC = State(3)
End Property
Property Get RegisterD() As
String
RegisterD = State(4)
End Property
Public Function
Md5_String_Calc(SourceString As String) As String
MD5Init
MD5Update LenB(StrConv(SourceString,
vbFromUnicode)), StringToArray(SourceString)
MD5Final
Md5_String_Calc = GetValues
End Function
Public Function
Md5_File_Calc(InFile As String) As String
On Error GoTo errorhandler
GoSub begin
errorhandler:
Exit Function
begin:
Dim FileO As Integer
FileO = FreeFile
Call FileLen(InFile)
Open InFile For Binary Access Read As
#FileO
MD5Init
Do While Not EOF(FileO)
Get #FileO, , ByteBuffer
If Loc(FileO) < LOF(FileO) Then
ByteCounter = ByteCounter + 64
MD5Transform ByteBuffer
End If
Loop
ByteCounter = ByteCounter + (LOF(FileO)
Mod 64)
Close #FileO
MD5Final
Md5_File_Calc = GetValues
End Function
Private Function
StringToArray(InString As String) As Byte()
Dim I As Integer, bytBuffer() As Byte
ReDim bytBuffer(LenB(StrConv(InString,
vbFromUnicode)))
bytBuffer = StrConv(InString,
vbFromUnicode)
StringToArray = bytBuffer
End Function
Public Function GetValues() As
String
GetValues = LongToString(State(1))
& LongToString(State(2)) & LongToString(State(3)) &
LongToString(State(4))
End Function
Private Function LongToString(Num
As Long) As String
Dim A As Byte, B As Byte, C As
Byte, D As Byte
A = Num And &HFF&
If A < 16 Then LongToString =
"0" & Hex(A) Else LongToString = Hex(A)
B = (Num And &HFF00&) \ 256
If B < 16 Then LongToString =
LongToString & "0" & Hex(B) Else LongToString = LongToString
& Hex(B)
C = (Num And &HFF0000) \ 65536
If C < 16 Then LongToString =
LongToString & "0" & Hex(C) Else LongToString = LongToString
& Hex(C)
If Num < 0 Then D = ((Num And
&H7F000000) \ 16777216) Or &H80& Else D = (Num And &HFF000000)
\ 16777216
If D < 16 Then LongToString =
LongToString & "0" & Hex(D) Else LongToString = LongToString
& Hex(D)
End Function
Public Sub MD5Init()
ByteCounter = 0
State(1) = UnsignedToLong(1732584193#)
State(2) = UnsignedToLong(4023233417#)
State(3) = UnsignedToLong(2562383102#)
State(4) = UnsignedToLong(271733878#)
End Sub
Public Sub MD5Final()
Dim dblBits As Double, padding(72) As
Byte, lngBytesBuffered As Long
padding(0) = &H80
dblBits = ByteCounter * 8
lngBytesBuffered = ByteCounter Mod 64
If lngBytesBuffered <= 56 Then
MD5Update 56 - lngBytesBuffered, padding Else MD5Update 120 - ByteCounter,
padding
padding(0) = UnsignedToLong(dblBits)
And &HFF&
padding(1) = UnsignedToLong(dblBits) \
256 And &HFF&
padding(2) = UnsignedToLong(dblBits) \
65536 And &HFF&
padding(3) = UnsignedToLong(dblBits) \
16777216 And &HFF&
padding(4) = 0
padding(5) = 0
padding(6) = 0
padding(7) = 0
MD5Update 8, padding
End Sub
Public Sub MD5Update(InputLen As
Long, InputBuffer() As Byte)
Dim II As Integer, I As Integer, J As
Integer, K As Integer, lngBufferedBytes As Long, lngBufferRemaining As Long,
lngRem As Long
lngBufferedBytes = ByteCounter Mod 64
lngBufferRemaining = 64 -
lngBufferedBytes
ByteCounter = ByteCounter + InputLen
If InputLen >= lngBufferRemaining
Then
For II = 0 To lngBufferRemaining -
1
ByteBuffer(lngBufferedBytes +
II) = InputBuffer(II)
Next II
MD5Transform ByteBuffer
lngRem = (InputLen) Mod 64
For I = lngBufferRemaining To
InputLen - II - lngRem Step 64
For J = 0 To 63
ByteBuffer(J) =
InputBuffer(I + J)
Next J
MD5Transform ByteBuffer
Next I
lngBufferedBytes = 0
Else
I = 0
End If
For K = 0 To InputLen - I - 1
ByteBuffer(lngBufferedBytes + K) =
InputBuffer(I + K)
Next K
End Sub
Private Sub MD5Transform(Buffer()
As Byte)
Dim x(16) As Long, A As Long, B As
Long, C As Long, D As Long
A = State(1)
B = State(2)
C = State(3)
D = State(4)
Decode 64, x, Buffer
FF A, B, C, D, x(0), S11, -680876936
FF D, A, B, C, x(1), S12, -389564586
FF C, D, A, B, x(2), S13, 606105819
FF B, C, D, A, x(3), S14, -1044525330
FF A, B, C, D, x(4), S11, -176418897
FF D, A, B, C, x(5), S12, 1200080426
FF C, D, A, B, x(6), S13, -1473231341
FF B, C, D, A, x(7), S14, -45705983
FF A, B, C, D, x(8), S11, 1770035416
FF D, A, B, C, x(9), S12, -1958414417
FF C, D, A, B, x(10), S13, -42063
FF B, C, D, A, x(11), S14, -1990404162
FF A, B, C, D, x(12), S11, 1804603682
FF D, A, B, C, x(13), S12, -40341101
FF C, D, A, B, x(14), S13, -1502002290
FF B, C, D, A, x(15), S14, 1236535329
GG A, B, C, D, x(1), S21, -165796510
GG D, A, B, C, x(6), S22, -1069501632
GG C, D, A, B, x(11), S23, 643717713
GG B, C, D, A, x(0), S24, -373897302
GG A, B, C, D, x(5), S21, -701558691
GG D, A, B, C, x(10), S22, 38016083
GG C, D, A, B, x(15), S23, -660478335
GG B, C, D, A, x(4), S24, -405537848
GG A, B, C, D, x(9), S21, 568446438
GG D, A, B, C, x(14), S22, -1019803690
GG C, D, A, B, x(3), S23, -187363961
GG B, C, D, A, x(8), S24, 1163531501
GG A, B, C, D, x(13), S21, -1444681467
GG D, A, B, C, x(2), S22, -51403784
GG C, D, A, B, x(7), S23, 1735328473
GG B, C, D, A, x(12), S24, -1926607734
HH A, B, C, D, x(5), S31, -378558
HH D, A, B, C, x(8), S32, -2022574463
HH C, D, A, B, x(11), S33, 1839030562
HH B, C, D, A, x(14), S34, -35309556
HH A, B, C, D, x(1), S31, -1530992060
HH D, A, B, C, x(4), S32, 1272893353
HH C, D, A, B, x(7), S33, -155497632
HH B, C, D, A, x(10), S34, -1094730640
HH A, B, C, D, x(13), S31, 681279174
HH D, A, B, C, x(0), S32, -358537222
HH C, D, A, B, x(3), S33, -722521979
HH B, C, D, A, x(6), S34, 76029189
HH A, B, C, D, x(9), S31, -640364487
HH D, A, B, C, x(12), S32, -421815835
HH C, D, A, B, x(15), S33, 530742520
HH B, C, D, A, x(2), S34, -995338651
II A, B, C, D, x(0), S41, -198630844
II D, A, B, C, x(7), S42, 1126891415
II C, D, A, B, x(14), S43, -1416354905
II B, C, D, A, x(5), S44, -57434055
II A, B, C, D, x(12), S41, 1700485571
II D, A, B, C, x(3), S42, -1894986606
II C, D, A, B, x(10), S43, -1051523
II B, C, D, A, x(1), S44, -2054922799
II A, B, C, D, x(8), S41, 1873313359
II D, A, B, C, x(15), S42, -30611744
II C, D, A, B, x(6), S43, -1560198380
II B, C, D, A, x(13), S44, 1309151649
II A, B, C, D, x(4), S41, -145523070
II D, A, B, C, x(11), S42, -1120210379
II C, D, A, B, x(2), S43, 718787259
II B, C, D, A, x(9), S44, -343485551
State(1) = LongOverflowAdd(State(1), A)
State(2) = LongOverflowAdd(State(2), B)
State(3) = LongOverflowAdd(State(3), C)
State(4) = LongOverflowAdd(State(4), D)
End Sub
Private Sub Decode(Length As
Integer, OutputBuffer() As Long, InputBuffer() As Byte)
Dim intDblIndex As Integer,
intByteIndex As Integer, dblSum As Double
For intByteIndex = 0 To Length - 1 Step
4
dblSum = InputBuffer(intByteIndex)
+ InputBuffer(intByteIndex + 1) * 256# + InputBuffer(intByteIndex + 2) * 65536#
+ InputBuffer(intByteIndex + 3) * 16777216#
OutputBuffer(intDblIndex) =
UnsignedToLong(dblSum)
intDblIndex = intDblIndex + 1
Next intByteIndex
End Sub
Private Function FF(A As Long, B
As Long, C As Long, D As Long, x As Long, S As Long, ac As Long) As Long
A = LongOverflowAdd4(A, (B And C) Or
(Not (B) And D), x, ac)
A = LongLeftRotate(A, S)
A = LongOverflowAdd(A, B)
End Function
Private Function GG(A As Long, B
As Long, C As Long, D As Long, x As Long, S As Long, ac As Long) As Long
A = LongOverflowAdd4(A, (B And D) Or (C
And Not (D)), x, ac)
A = LongLeftRotate(A, S)
A = LongOverflowAdd(A, B)
End Function
Private Function HH(A As Long, B
As Long, C As Long, D As Long, x As Long, S As Long, ac As Long) As Long
A = LongOverflowAdd4(A, B Xor C Xor D,
x, ac)
A = LongLeftRotate(A, S)
A = LongOverflowAdd(A, B)
End Function
Private Function II(A As Long, B
As Long, C As Long, D As Long, x As Long, S As Long, ac As Long) As Long
A = LongOverflowAdd4(A, C Xor (B Or Not
(D)), x, ac)
A = LongLeftRotate(A, S)
A = LongOverflowAdd(A, B)
End Function
Private Function
LongLeftRotate(value As Long, Bits As Long) As Long
Dim lngSign As Long, lngI As Long
Bits = Bits Mod 32
If Bits = 0 Then LongLeftRotate =
value: Exit Function
For lngI = 1 To Bits
lngSign = value And &HC0000000
value = (value And &H3FFFFFFF)
* 2
value = value Or ((lngSign < 0)
And 1) Or (CBool(lngSign And &H40000000) And &H80000000)
Next
LongLeftRotate = value
End Function
Private Function
LongOverflowAdd(Val1 As Long, Val2 As Long) As Long
Dim lngHighWord As Long, lngLowWord As
Long, lngOverflow As Long
lngLowWord = (Val1 And &HFFFF&)
+ (Val2 And &HFFFF&)
lngOverflow = lngLowWord \ 65536
lngHighWord = (((Val1 And
&HFFFF0000) \ 65536) + ((Val2 And &HFFFF0000) \ 65536) + lngOverflow)
And &HFFFF&
LongOverflowAdd = UnsignedToLong((lngHighWord
* 65536#) + (lngLowWord And &HFFFF&))
End Function
Private Function
LongOverflowAdd4(Val1 As Long, Val2 As Long, val3 As Long, val4 As Long) As
Long
Dim lngHighWord As Long, lngLowWord As
Long, lngOverflow As Long
lngLowWord = (Val1 And &HFFFF&)
+ (Val2 And &HFFFF&) + (val3 And &HFFFF&) + (val4 And
&HFFFF&)
lngOverflow = lngLowWord \ 65536
lngHighWord = (((Val1 And
&HFFFF0000) \ 65536) + ((Val2 And &HFFFF0000) \ 65536) + ((val3 And
&HFFFF0000) \ 65536) + ((val4 And &HFFFF0000) \ 65536) + lngOverflow)
And &HFFFF&
LongOverflowAdd4 =
UnsignedToLong((lngHighWord * 65536#) + (lngLowWord And &HFFFF&))
End Function
Private Function
UnsignedToLong(value As Double) As Long
If value < 0 Or value >= OFFSET_4
Then Error 6
If value <= MAXINT_4 Then
UnsignedToLong = value Else UnsignedToLong = value - OFFSET_4
End Function
Private Function
LongToUnsigned(value As Long) As Double
If value < 0 Then LongToUnsigned =
value + OFFSET_4 Else LongToUnsigned = value
End Function
