md5_module.bas
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上传用户:luoweizhao
上传日期:2022-08-01
资源大小:1290k
文件大小:13k
源码类别:
外挂编程
开发平台:
Visual Basic
- Attribute VB_Name = "md5_module"
- Option Explicit
- Private Const OFFSET_4 = 4294967296#
- Private Const MAXINT_4 = 2147483647
- 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
- Private State(4) As Long
- Private ByteCounter As Long
- Private ByteBuffer(63) As Byte
- 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 DigestFileToHexStr(filename As String) As String
- 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
- End Function
- Public Function md5(SourceString As String) As String
- MD5Init
- MD5Update Len(SourceString), StringToArray(SourceString)
- MD5Final
- md5 = GetValues
- End Function
- Private Function StringToArray(InString As String) As Byte()
- 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
- 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
- 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
- End Function
- '
- ' Initialize the class
- ' This must be called before a digest calculation is started
- '
- Public Sub MD5Init()
- ByteCounter = 0
- State(1) = UnsignedToLong(1732584193#)
- State(2) = UnsignedToLong(4023233417#)
- State(3) = UnsignedToLong(2562383102#)
- State(4) = UnsignedToLong(271733878#)
- End Sub
- '
- ' MD5 Final
- '
- Public Sub MD5Final()
- 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
- End Sub
- '
- ' Break up input stream into 64 byte chunks
- '
- Public Sub MD5Update(InputLen As Long, InputBuffer() As Byte)
- 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
- End Sub
- '
- ' MD5 Transform
- '
- Private Sub MD5Transform(Buffer() As Byte)
- 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));
- End Sub
- Private Sub Decode(length As Integer, OutputBuffer() As Long, InputBuffer() As Byte)
- 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
- 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
- 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
- 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
- End Function
- Private Function LongOverflowAdd(Val1 As Long, Val2 As Long) As Long
- 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&))
- End Function
- Private Function LongOverflowAdd4(Val1 As Long, Val2 As Long, val3 As Long, val4 As Long) As Long
- 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&))
- 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 If
- End Function
- Private Function LongToUnsigned(value As Long) As Double
- If value < 0 Then
- LongToUnsigned = value + OFFSET_4
- Else
- LongToUnsigned = value
- End If
- End Function