Option Explicit 'Class Constants Private Const OFFSET_4 = 4294967296# Private Const MAXINT_4 = 2147483647Private 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 'Class Variables Private State(4) As Long Private ByteCounter As Long Private ByteBuffer(63) As Byte 'Class Properties Property Get RegisterA() As String On Error GoTo RegisterA_Err RegisterA = State(1) Exit Property RegisterA_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.RegisterA", _ "MD5 component failure" End Property Property Get RegisterB() As String On Error GoTo RegisterB_Err RegisterB = State(2) Exit Property RegisterB_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.RegisterB", _ "MD5 component failure" End Property Property Get RegisterC() As String On Error GoTo RegisterC_Err RegisterC = State(3) Exit Property RegisterC_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.RegisterC", _ "MD5 component failure" End Property Property Get RegisterD() As String On Error GoTo RegisterD_Err RegisterD = State(4) Exit Property RegisterD_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.RegisterD", _ "MD5 component failure" End Property '= Class Functions ' Function to quickly digest a file into a hex string Public Function DigestFileToHexStr(Filename As String) As String On Error GoTo DigestFileToHexStr_Err On Error GoTo errEnd Open Filename For Binary Access Read As #1 MD5Init Do While Not EOF(1) Get #1, , ByteBuffer If Loc(1) < LOF(1) Then ByteCounter = ByteCounter + 64 MD5Transform ByteBuffer End If Loop ByteCounter = ByteCounter + (LOF(1) Mod 64) Close #1 MD5Final DigestFileToHexStr = GetValues errEnd: Exit Function Exit Function DigestFileToHexStr_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.DigestFileToHexStr", _ "MD5 component failure" End Function ' Function to digest a text string and output the result as a string ' of hexadecimal characters. Public Function DigestStrToHexStr(SourceString As String) As String On Error GoTo DigestStrToHexStr_Err MD5Init MD5Update Len(SourceString), StringToArray(SourceString) MD5Final DigestStrToHexStr = GetValues Exit Function DigestStrToHexStr_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.DigestStrToHexStr", _ "MD5 component failure" End Function ' A utility function which converts a string into an array of bytes. Private Function StringToArray(InString As String) As Byte() On Error GoTo StringToArray_Err Dim i As Integer Dim bytBuffer() As Byte ReDim bytBuffer(Len(InString)) For i = 0 To Len(InString) - 1 bytBuffer(i) = Asc(Mid(InString, i + 1, 1)) Next i StringToArray = bytBuffer Exit Function StringToArray_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.StringToArray", _ "MD5 component failure" End Function ' Concatenate the four state vaules into one string Public Function GetValues() As String On Error GoTo GetValues_Err GetValues = LongToString(State(1)) & LongToString(State(2)) & LongToString(State(3)) & LongToString(State(4)) Exit Function GetValues_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.GetValues", _ "MD5 component failure" End Function ' Convert a Long to a Hex string Private Function LongToString(Num As Long) As String On Error GoTo LongToString_Err Dim a As Byte Dim b As Byte Dim c As Byte Dim d As Byte a = Num And &HFF& If a < 16 Then LongToString = "0" & Hex(a) Else LongToString = Hex(a) End If b = (Num And &HFF00&) \ 256 If b < 16 Then LongToString = LongToString & "0" & Hex(b) Else LongToString = LongToString & Hex(b) End If c = (Num And &HFF0000) \ 65536 If c < 16 Then LongToString = LongToString & "0" & Hex(c) Else LongToString = LongToString & Hex(c) End If If Num < 0 Then d = ((Num And &H7F000000) \ 16777216) Or &H80& Else d = (Num And &HFF000000) \ 16777216 End If If d < 16 Then LongToString = LongToString & "0" & Hex(d) Else LongToString = LongToString & Hex(d) End If Exit Function LongToString_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.LongToString", _ "MD5 component failure" End Function ' Initialize the class ' This must be called before a digest calculation is started Public Sub MD5Init() On Error GoTo MD5Init_Err ByteCounter = 0 State(1) = UnsignedToLong(1732584193#) State(2) = UnsignedToLong(4023233417#) State(3) = UnsignedToLong(2562383102#) State(4) = UnsignedToLong(271733878#) Exit Sub MD5Init_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.MD5Init", _ "MD5 component failure" End Sub ' MD5 Final Public Sub MD5Final() On Error GoTo MD5Final_Err Dim dblBits As Double Dim padding(72) As Byte Dim lngBytesBuffered As Long padding(0) = &H80 dblBits = ByteCounter * 8 ' Pad out lngBytesBuffered = ByteCounter Mod 64 If lngBytesBuffered <= 56 Then MD5Update 56 - lngBytesBuffered, padding Else MD5Update 120 - ByteCounter, padding End If 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 '<EhFooter> Exit Sub MD5Final_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.MD5Final", _ "MD5 component failure" '</EhFooter> End Sub
' Break up input stream into 64 byte chunks Public Sub MD5Update(InputLen As Long, InputBuffer() As Byte) '<EhHeader> On Error GoTo MD5Update_Err '</EhHeader> Dim II As Integer Dim i As Integer Dim J As Integer Dim K As Integer Dim lngBufferedBytes As Long Dim lngBufferRemaining As Long Dim lngRem As Long lngBufferedBytes = ByteCounter Mod 64 lngBufferRemaining = 64 - lngBufferedBytes ByteCounter = ByteCounter + InputLen ' Use up old buffer results first If InputLen >= lngBufferRemaining Then For II = 0 To lngBufferRemaining - 1 ByteBuffer(lngBufferedBytes + II) = InputBuffer(II) Next II MD5Transform ByteBuffer lngRem = (InputLen) Mod 64 ' The transfer is a multiple of 64 lets do some transformations 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 ' Buffer any remaining input For K = 0 To InputLen - i - 1 ByteBuffer(lngBufferedBytes + K) = InputBuffer(i + K) Next K '<EhFooter> Exit Sub MD5Update_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.MD5Update", _ "MD5 component failure" '</EhFooter> End Sub ' MD5 Transform Private Sub MD5Transform(Buffer() As Byte) '<EhHeader> On Error GoTo MD5Transform_Err '</EhHeader> Dim x(16) As Long Dim a As Long Dim b As Long Dim c As Long Dim d As Long a = State(1) b = State(2) c = State(3) d = State(4) Decode 64, x, Buffer ' Round 1 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 ' Round 2 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 ' Round 3 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 ' Round 4 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) ' /* Zeroize sensitive information. '*/ ' MD5_memset ((POINTER)x, 0, sizeof (x)); '<EhFooter> Exit Sub MD5Transform_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.MD5Transform", _ "MD5 component failure" '</EhFooter> End Sub Private Sub Decode(Length As Integer, OutputBuffer() As Long, InputBuffer() As Byte) '<EhHeader> On Error GoTo Decode_Err '</EhHeader> Dim intDblIndex As Integer Dim intByteIndex As Integer Dim dblSum As Double intDblIndex = 0 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 '<EhFooter> Exit Sub Decode_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.Decode", _ "MD5 component failure" '</EhFooter> End Sub ' ' FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. ' Rotation is separate from addition to prevent recomputation. '
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 '<EhHeader> On Error GoTo FF_Err '</EhHeader> a = LongOverflowAdd4(a, (b And c) Or (Not (b) And d), x, ac) a = LongLeftRotate(a, s) a = LongOverflowAdd(a, b) '<EhFooter> Exit Function FF_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.FF", _ "MD5 component failure" '</EhFooter> 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 '<EhHeader> On Error GoTo GG_Err '</EhHeader> a = LongOverflowAdd4(a, (b And d) Or (c And Not (d)), x, ac) a = LongLeftRotate(a, s) a = LongOverflowAdd(a, b) '<EhFooter> Exit Function GG_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.GG", _ "MD5 component failure" '</EhFooter> 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 '<EhHeader> On Error GoTo HH_Err '</EhHeader> a = LongOverflowAdd4(a, b Xor c Xor d, x, ac) a = LongLeftRotate(a, s) a = LongOverflowAdd(a, b) '<EhFooter> Exit Function HH_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.HH", _ "MD5 component failure" '</EhFooter> 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 '<EhHeader> On Error GoTo II_Err '</EhHeader> a = LongOverflowAdd4(a, c Xor (b Or Not (d)), x, ac) a = LongLeftRotate(a, s) a = LongOverflowAdd(a, b) '<EhFooter> Exit Function II_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.II", _ "MD5 component failure" '</EhFooter> End Function ' ' Rotate a long to the right ' Function LongLeftRotate(value As Long, bits As Long) As Long '<EhHeader> On Error GoTo LongLeftRotate_Err '</EhHeader> Dim lngSign As Long Dim 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 '<EhFooter> Exit Function LongLeftRotate_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.LongLeftRotate", _ "MD5 component failure" '</EhFooter> End Function ' ' Function to add two unsigned numbers together as in C. ' Overflows are ignored! ' Private Function LongOverflowAdd(Val1 As Long, Val2 As Long) As Long '<EhHeader> On Error GoTo LongOverflowAdd_Err '</EhHeader> Dim lngHighWord As Long Dim lngLowWord As Long Dim 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&)) '<EhFooter> Exit Function LongOverflowAdd_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.LongOverflowAdd", _ "MD5 component failure" '</EhFooter> End Function ' ' Function to add two unsigned numbers together as in C. ' Overflows are ignored! ' Private Function LongOverflowAdd4(Val1 As Long, Val2 As Long, val3 As Long, val4 As Long) As Long '<EhHeader> On Error GoTo LongOverflowAdd4_Err '</EhHeader> Dim lngHighWord As Long Dim lngLowWord As Long Dim 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&)) '<EhFooter> Exit Function LongOverflowAdd4_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.LongOverflowAdd4", _ "MD5 component failure" '</EhFooter> End Function ' ' Convert an unsigned double into a long ' Private Function UnsignedToLong(value As Double) As Long '<EhHeader> On Error GoTo UnsignedToLong_Err '</EhHeader> If value < 0 Or value >= OFFSET_4 Then Error 6 ' Overflow If value <= MAXINT_4 Then UnsignedToLong = value Else UnsignedToLong = value - OFFSET_4 End If '<EhFooter> Exit Function UnsignedToLong_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.UnsignedToLong", _ "MD5 component failure" '</EhFooter> End Function ' ' Convert a long to an unsigned Double ' Private Function LongToUnsigned(value As Long) As Double '<EhHeader> On Error GoTo LongToUnsigned_Err '</EhHeader> If value < 0 Then LongToUnsigned = value + OFFSET_4 Else LongToUnsigned = value End If '<EhFooter> Exit Function LongToUnsigned_Err: Err.Raise vbObjectError + 100, _ "vbMD5.MD5.LongToUnsigned", _ "MD5 component failure" '</EhFooter> End Function 类MD5 Dim md5Test As New MD5 txtStrMD5.Text = md5Test.DigestStrToHexStr(txtStr.Text) txtFileMD5.Text = md5Test.DigestFileToHexStr(txtFile.Text)
'Class Constants
Private Const OFFSET_4 = 4294967296#
Private Const MAXINT_4 = 2147483647Private 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
'Class Variables
Private State(4) As Long
Private ByteCounter As Long
Private ByteBuffer(63) As Byte
'Class Properties
Property Get RegisterA() As String
On Error GoTo RegisterA_Err
RegisterA = State(1)
Exit Property
RegisterA_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.RegisterA", _
"MD5 component failure"
End Property
Property Get RegisterB() As String
On Error GoTo RegisterB_Err
RegisterB = State(2)
Exit Property
RegisterB_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.RegisterB", _
"MD5 component failure"
End Property
Property Get RegisterC() As String
On Error GoTo RegisterC_Err
RegisterC = State(3)
Exit Property
RegisterC_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.RegisterC", _
"MD5 component failure"
End Property
Property Get RegisterD() As String
On Error GoTo RegisterD_Err
RegisterD = State(4)
Exit Property
RegisterD_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.RegisterD", _
"MD5 component failure"
End Property
'= Class Functions
' Function to quickly digest a file into a hex string
Public Function DigestFileToHexStr(Filename As String) As String
On Error GoTo DigestFileToHexStr_Err
On Error GoTo errEnd
Open Filename For Binary Access Read As #1
MD5Init
Do While Not EOF(1)
Get #1, , ByteBuffer
If Loc(1) < LOF(1) Then
ByteCounter = ByteCounter + 64
MD5Transform ByteBuffer
End If
Loop
ByteCounter = ByteCounter + (LOF(1) Mod 64)
Close #1
MD5Final
DigestFileToHexStr = GetValues
errEnd:
Exit Function
Exit Function
DigestFileToHexStr_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.DigestFileToHexStr", _
"MD5 component failure"
End Function
' Function to digest a text string and output the result as a string
' of hexadecimal characters.
Public Function DigestStrToHexStr(SourceString As String) As String
On Error GoTo DigestStrToHexStr_Err
MD5Init
MD5Update Len(SourceString), StringToArray(SourceString)
MD5Final
DigestStrToHexStr = GetValues
Exit Function
DigestStrToHexStr_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.DigestStrToHexStr", _
"MD5 component failure"
End Function
' A utility function which converts a string into an array of bytes.
Private Function StringToArray(InString As String) As Byte()
On Error GoTo StringToArray_Err
Dim i As Integer
Dim bytBuffer() As Byte
ReDim bytBuffer(Len(InString))
For i = 0 To Len(InString) - 1
bytBuffer(i) = Asc(Mid(InString, i + 1, 1))
Next i
StringToArray = bytBuffer
Exit Function
StringToArray_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.StringToArray", _
"MD5 component failure"
End Function
' Concatenate the four state vaules into one string
Public Function GetValues() As String
On Error GoTo GetValues_Err
GetValues = LongToString(State(1)) & LongToString(State(2)) & LongToString(State(3)) & LongToString(State(4))
Exit Function
GetValues_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.GetValues", _
"MD5 component failure"
End Function
' Convert a Long to a Hex string
Private Function LongToString(Num As Long) As String
On Error GoTo LongToString_Err
Dim a As Byte
Dim b As Byte
Dim c As Byte
Dim d As Byte
a = Num And &HFF&
If a < 16 Then
LongToString = "0" & Hex(a)
Else
LongToString = Hex(a)
End If
b = (Num And &HFF00&) \ 256
If b < 16 Then
LongToString = LongToString & "0" & Hex(b)
Else
LongToString = LongToString & Hex(b)
End If
c = (Num And &HFF0000) \ 65536
If c < 16 Then
LongToString = LongToString & "0" & Hex(c)
Else
LongToString = LongToString & Hex(c)
End If
If Num < 0 Then
d = ((Num And &H7F000000) \ 16777216) Or &H80&
Else
d = (Num And &HFF000000) \ 16777216
End If
If d < 16 Then
LongToString = LongToString & "0" & Hex(d)
Else
LongToString = LongToString & Hex(d)
End If
Exit Function
LongToString_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.LongToString", _
"MD5 component failure"
End Function
' Initialize the class
' This must be called before a digest calculation is started
Public Sub MD5Init()
On Error GoTo MD5Init_Err
ByteCounter = 0
State(1) = UnsignedToLong(1732584193#)
State(2) = UnsignedToLong(4023233417#)
State(3) = UnsignedToLong(2562383102#)
State(4) = UnsignedToLong(271733878#)
Exit Sub
MD5Init_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.MD5Init", _
"MD5 component failure"
End Sub
' MD5 Final
Public Sub MD5Final()
On Error GoTo MD5Final_Err
Dim dblBits As Double
Dim padding(72) As Byte
Dim lngBytesBuffered As Long
padding(0) = &H80
dblBits = ByteCounter * 8
' Pad out
lngBytesBuffered = ByteCounter Mod 64
If lngBytesBuffered <= 56 Then
MD5Update 56 - lngBytesBuffered, padding
Else
MD5Update 120 - ByteCounter, padding
End If
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
'<EhFooter>
Exit Sub
MD5Final_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.MD5Final", _
"MD5 component failure"
'</EhFooter>
End Sub
Public Sub MD5Update(InputLen As Long, InputBuffer() As Byte)
'<EhHeader>
On Error GoTo MD5Update_Err
'</EhHeader>
Dim II As Integer
Dim i As Integer
Dim J As Integer
Dim K As Integer
Dim lngBufferedBytes As Long
Dim lngBufferRemaining As Long
Dim lngRem As Long
lngBufferedBytes = ByteCounter Mod 64
lngBufferRemaining = 64 - lngBufferedBytes
ByteCounter = ByteCounter + InputLen
' Use up old buffer results first
If InputLen >= lngBufferRemaining Then
For II = 0 To lngBufferRemaining - 1
ByteBuffer(lngBufferedBytes + II) = InputBuffer(II)
Next II
MD5Transform ByteBuffer
lngRem = (InputLen) Mod 64
' The transfer is a multiple of 64 lets do some transformations
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
' Buffer any remaining input
For K = 0 To InputLen - i - 1
ByteBuffer(lngBufferedBytes + K) = InputBuffer(i + K)
Next K
'<EhFooter>
Exit Sub
MD5Update_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.MD5Update", _
"MD5 component failure"
'</EhFooter>
End Sub
' MD5 Transform
Private Sub MD5Transform(Buffer() As Byte)
'<EhHeader>
On Error GoTo MD5Transform_Err
'</EhHeader>
Dim x(16) As Long
Dim a As Long
Dim b As Long
Dim c As Long
Dim d As Long
a = State(1)
b = State(2)
c = State(3)
d = State(4)
Decode 64, x, Buffer
' Round 1
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
' Round 2
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
' Round 3
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
' Round 4
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)
' /* Zeroize sensitive information.
'*/
' MD5_memset ((POINTER)x, 0, sizeof (x));
'<EhFooter>
Exit Sub
MD5Transform_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.MD5Transform", _
"MD5 component failure"
'</EhFooter>
End Sub
Private Sub Decode(Length As Integer, OutputBuffer() As Long, InputBuffer() As Byte)
'<EhHeader>
On Error GoTo Decode_Err
'</EhHeader>
Dim intDblIndex As Integer
Dim intByteIndex As Integer
Dim dblSum As Double
intDblIndex = 0
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
'<EhFooter>
Exit Sub
Decode_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.Decode", _
"MD5 component failure"
'</EhFooter>
End Sub
'
' FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
' Rotation is separate from addition to prevent recomputation.
'
b As Long, _
c As Long, _
d As Long, _
x As Long, _
s As Long, _
ac As Long) As Long
'<EhHeader>
On Error GoTo FF_Err
'</EhHeader>
a = LongOverflowAdd4(a, (b And c) Or (Not (b) And d), x, ac)
a = LongLeftRotate(a, s)
a = LongOverflowAdd(a, b)
'<EhFooter>
Exit Function
FF_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.FF", _
"MD5 component failure"
'</EhFooter>
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
'<EhHeader>
On Error GoTo GG_Err
'</EhHeader>
a = LongOverflowAdd4(a, (b And d) Or (c And Not (d)), x, ac)
a = LongLeftRotate(a, s)
a = LongOverflowAdd(a, b)
'<EhFooter>
Exit Function
GG_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.GG", _
"MD5 component failure"
'</EhFooter>
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
'<EhHeader>
On Error GoTo HH_Err
'</EhHeader>
a = LongOverflowAdd4(a, b Xor c Xor d, x, ac)
a = LongLeftRotate(a, s)
a = LongOverflowAdd(a, b)
'<EhFooter>
Exit Function
HH_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.HH", _
"MD5 component failure"
'</EhFooter>
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
'<EhHeader>
On Error GoTo II_Err
'</EhHeader>
a = LongOverflowAdd4(a, c Xor (b Or Not (d)), x, ac)
a = LongLeftRotate(a, s)
a = LongOverflowAdd(a, b)
'<EhFooter>
Exit Function
II_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.II", _
"MD5 component failure"
'</EhFooter>
End Function
'
' Rotate a long to the right
'
Function LongLeftRotate(value As Long, bits As Long) As Long
'<EhHeader>
On Error GoTo LongLeftRotate_Err
'</EhHeader>
Dim lngSign As Long
Dim 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
'<EhFooter>
Exit Function
LongLeftRotate_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.LongLeftRotate", _
"MD5 component failure"
'</EhFooter>
End Function
'
' Function to add two unsigned numbers together as in C.
' Overflows are ignored!
'
Private Function LongOverflowAdd(Val1 As Long, Val2 As Long) As Long
'<EhHeader>
On Error GoTo LongOverflowAdd_Err
'</EhHeader>
Dim lngHighWord As Long
Dim lngLowWord As Long
Dim 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&))
'<EhFooter>
Exit Function
LongOverflowAdd_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.LongOverflowAdd", _
"MD5 component failure"
'</EhFooter>
End Function
'
' Function to add two unsigned numbers together as in C.
' Overflows are ignored!
'
Private Function LongOverflowAdd4(Val1 As Long, Val2 As Long, val3 As Long, val4 As Long) As Long
'<EhHeader>
On Error GoTo LongOverflowAdd4_Err
'</EhHeader>
Dim lngHighWord As Long
Dim lngLowWord As Long
Dim 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&))
'<EhFooter>
Exit Function
LongOverflowAdd4_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.LongOverflowAdd4", _
"MD5 component failure"
'</EhFooter>
End Function
'
' Convert an unsigned double into a long
'
Private Function UnsignedToLong(value As Double) As Long
'<EhHeader>
On Error GoTo UnsignedToLong_Err
'</EhHeader>
If value < 0 Or value >= OFFSET_4 Then Error 6 ' Overflow
If value <= MAXINT_4 Then
UnsignedToLong = value
Else
UnsignedToLong = value - OFFSET_4
End If
'<EhFooter>
Exit Function
UnsignedToLong_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.UnsignedToLong", _
"MD5 component failure"
'</EhFooter>
End Function
'
' Convert a long to an unsigned Double
'
Private Function LongToUnsigned(value As Long) As Double
'<EhHeader>
On Error GoTo LongToUnsigned_Err
'</EhHeader>
If value < 0 Then
LongToUnsigned = value + OFFSET_4
Else
LongToUnsigned = value
End If
'<EhFooter>
Exit Function
LongToUnsigned_Err:
Err.Raise vbObjectError + 100, _
"vbMD5.MD5.LongToUnsigned", _
"MD5 component failure"
'</EhFooter>
End Function
类MD5
Dim md5Test As New MD5
txtStrMD5.Text = md5Test.DigestStrToHexStr(txtStr.Text)
txtFileMD5.Text = md5Test.DigestFileToHexStr(txtFile.Text)