用asp实现md5加密

来源：互联网发布：神棍局知乎编辑：程序博客网时间：2024/06/05 18:37

我最近几天闲了没有事情，就写了一个md5类。
Class Md_Class
  Private BITS_TO_A_BYTE
  Private BYTES_TO_A_WORD
  Private BITS_TO_A_WORD

  Private m_lOnBits(30)
  Private m_l2Power(30)

  Private Sub Class_Initialize()
   BITS_TO_A_BYTE = 8
      BYTES_TO_A_WORD = 4
      BITS_TO_A_WORD = 32
  End Sub
  Private Sub Class_Terminate()
   BITS_TO_A_BYTE = ""
      BYTES_TO_A_WORD = ""
      BITS_TO_A_WORD = ""
  End Sub
  Private Function LShift(lValue, iShiftBits)
   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

  Private Function RShift(lValue, iShiftBits)
   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

  Private Function RotateLeft(lValue, iShiftBits)
   RotateLeft = LShift(lValue, iShiftBits) Or RShift(lValue, (32 - iShiftBits))
  End Function

  Private Function AddUnsigned(lX, lY)
   Dim lX4
   Dim lY4
   Dim lX8
   Dim lY8
   Dim lResult

   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 Function md5_F(x, y, z)
   md5_F = (x And y) Or ((Not x) And z)
  End Function

  Private Function md5_G(x, y, z)
   md5_G = (x And z) Or (y And (Not z))
  End Function

  Private Function md5_H(x, y, z)
   md5_H = (x Xor y Xor z)
  End Function

  Private Function md5_I(x, y, z)
   md5_I = (y Xor (x Or (Not z)))
  End Function

  Private Sub md5_FF(a, b, c, d, x, s, ac)
   a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), x), ac))
   a = RotateLeft(a, s)
   a = AddUnsigned(a, b)
  End Sub

  Private Sub md5_GG(a, b, c, d, x, s, ac)
   a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), x), ac))
   a = RotateLeft(a, s)
   a = AddUnsigned(a, b)
  End Sub

  Private Sub md5_HH(a, b, c, d, x, s, ac)
   a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), x), ac))
   a = RotateLeft(a, s)
   a = AddUnsigned(a, b)
  End Sub

  Private Sub md5_II(a, b, c, d, x, s, ac)
   a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), x), ac))
   a = RotateLeft(a, s)
   a = AddUnsigned(a, b)
  End Sub

  Private Function ConvertToWordArray(sMessage)
   Dim lMessageLength
   Dim lNumberOfWords
   Dim lWordArray()
   Dim lBytePosition
   Dim lByteCount
   Dim lWordCount

   Const MODULUS_BITS = 512
   Const CONGRUENT_BITS = 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

  Private Function WordToHex(lValue)
   Dim lByte
   Dim lCount

   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 Function MD5(sMessage,stype)
   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
   Dim k
   Dim AA
   Dim BB
   Dim CC
   Dim DD
   Dim a
   Dim b
   Dim c
   Dim d

   Const S11 = 7
   Const S12 = 12
   Const S13 = 17
   Const S14 = 22
   Const S21 = 5
   Const S22 = 9
   Const S23 = 14
   Const S24 = 20
   Const S31 = 4
   Const S32 = 11
   Const S33 = 16
   Const S34 = 23
   Const S41 = 6
   Const S42 = 10
   Const S43 = 15
   Const S44 = 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

    a = AddUnsigned(a, AA)
    b = AddUnsigned(b, BB)
    c = AddUnsigned(c, CC)
    d = AddUnsigned(d, DD)
   Next

   if stype=32 then
   MD5 = LCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))
   else
   MD5=LCase(WordToHex(b) & WordToHex(c)) 'I crop this to fit 16byte database password :D
   end if
  End Function

  Public Function getEncode()
   dim tempDate
   dim tempTime
   tempDate=date
   tempTime=time
   getEncode=MD5(tempDate & tempTime &"."& split(formatnumber(Timer(),5),".")(1),32)
  End Function
End Class
在这里，我用了时间作为种子进行加密,也可以通过传值，进行加密。
具体的调用我写了如下：
set m_mdcls=new Md_Class
m=m_mdcls.MD5("0000000",32)
如果想在自己的数据库里面生成非自动增长的id。可以调用这里面的
getEncode（）
函数。