改了個MD5的VB類模組原始碼,可支援中文,也沒有網上流傳的那個超過16位就錯了的毛病! (11千字)
那個網上的MD5.BAS我研究了下,有嚴重問題.只好另找了個自已改了下.
在窗體中呼叫時如下:
set c1=new class 'class
為你存的類模快名
text1.text=md5_string_calc(sourcestring)
類模組原始碼如下:
Option Explicit
' Visual Basic MD5 Implementation
' Robert
Hubley and David Midkiff (mdj2023@hotmail.com)
' modify by simonyan, Support
chinese
' Standard MD5 implementation optimised for the Visual Basic environment.
' Conforms to all standards and can be used in digital signature or password
' protection related schemes.
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
DigestFileToHexStr = ""
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
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
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