VBS MD5加密算法

无聊想写一个VBS的MD5加密算法,然后开始写代码…

3个小时后遇到一点小问题,上网查一下,结果发现早已有高人给出代码.

我觉得3个小时的人生浪费了…

以下便是高人的代码:

Private Const BITS_TO_A_BYTE = 8  
Private Const BYTES_TO_A_WORD = 4  
Private Const BITS_TO_A_WORD = 32  
Private m_lOnBits(30)  
Private m_l2Power(30)  
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) 

a=inputbox("请输入密码:")  
wscript.echo md5(a) 

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

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

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

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

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

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

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

Private Sub II(a, b, c, d, x, s, ac)  
a = AddUnsigned(a, AddUnsigned(AddUnsigned(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)  
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 

FF a, b, c, d, x(k + 0), S11, &HD76AA478  
FF d, a, b, c, x(k + 1), S12, &HE8C7B756  
FF c, d, a, b, x(k + 2), S13, &H242070DB  
FF b, c, d, a, x(k + 3), S14, &HC1BDCEEE  
FF a, b, c, d, x(k + 4), S11, &HF57C0FAF  
FF d, a, b, c, x(k + 5), S12, &H4787C62A  
FF c, d, a, b, x(k + 6), S13, &HA8304613  
FF b, c, d, a, x(k + 7), S14, &HFD469501  
FF a, b, c, d, x(k + 8), S11, &H698098D8  
FF d, a, b, c, x(k + 9), S12, &H8B44F7AF  
FF c, d, a, b, x(k + 10), S13, &HFFFF5BB1  
FF b, c, d, a, x(k + 11), S14, &H895CD7BE  
FF a, b, c, d, x(k + 12), S11, &H6B901122  
FF d, a, b, c, x(k + 13), S12, &HFD987193  
FF c, d, a, b, x(k + 14), S13, &HA679438E  
FF b, c, d, a, x(k + 15), S14, &H49B40821 

GG a, b, c, d, x(k + 1), S21, &HF61E2562  
GG d, a, b, c, x(k + 6), S22, &HC040B340  
GG c, d, a, b, x(k + 11), S23, &H265E5A51  
GG b, c, d, a, x(k + 0), S24, &HE9B6C7AA  
GG a, b, c, d, x(k + 5), S21, &HD62F105D  
GG d, a, b, c, x(k + 10), S22, &H2441453  
GG c, d, a, b, x(k + 15), S23, &HD8A1E681  
GG b, c, d, a, x(k + 4), S24, &HE7D3FBC8  
GG a, b, c, d, x(k + 9), S21, &H21E1CDE6  
GG d, a, b, c, x(k + 14), S22, &HC33707D6  
GG c, d, a, b, x(k + 3), S23, &HF4D50D87  
GG b, c, d, a, x(k + 8), S24, &H455A14ED  
GG a, b, c, d, x(k + 13), S21, &HA9E3E905  
GG d, a, b, c, x(k + 2), S22, &HFCEFA3F8  
GG c, d, a, b, x(k + 7), S23, &H676F02D9  
GG b, c, d, a, x(k + 12), S24, &H8D2A4C8A 

HH a, b, c, d, x(k + 5), S31, &HFFFA3942  
HH d, a, b, c, x(k + 8), S32, &H8771F681  
HH c, d, a, b, x(k + 11), S33, &H6D9D6122  
HH b, c, d, a, x(k + 14), S34, &HFDE5380C  
HH a, b, c, d, x(k + 1), S31, &HA4BEEA44  
HH d, a, b, c, x(k + 4), S32, &H4BDECFA9  
HH c, d, a, b, x(k + 7), S33, &HF6BB4B60  
HH b, c, d, a, x(k + 10), S34, &HBEBFBC70  
HH a, b, c, d, x(k + 13), S31, &H289B7EC6  
HH d, a, b, c, x(k + 0), S32, &HEAA127FA  
HH c, d, a, b, x(k + 3), S33, &HD4EF3085  
HH b, c, d, a, x(k + 6), S34, &H4881D05  
HH a, b, c, d, x(k + 9), S31, &HD9D4D039  
HH d, a, b, c, x(k + 12), S32, &HE6DB99E5  
HH c, d, a, b, x(k + 15), S33, &H1FA27CF8  
HH b, c, d, a, x(k + 2), S34, &HC4AC5665 

II a, b, c, d, x(k + 0), S41, &HF4292244  
II d, a, b, c, x(k + 7), S42, &H432AFF97  
II c, d, a, b, x(k + 14), S43, &HAB9423A7  
II b, c, d, a, x(k + 5), S44, &HFC93A039  
II a, b, c, d, x(k + 12), S41, &H655B59C3  
II d, a, b, c, x(k + 3), S42, &H8F0CCC92  
II c, d, a, b, x(k + 10), S43, &HFFEFF47D  
II b, c, d, a, x(k + 1), S44, &H85845DD1  
II a, b, c, d, x(k + 8), S41, &H6FA87E4F  
II d, a, b, c, x(k + 15), S42, &HFE2CE6E0  
II c, d, a, b, x(k + 6), S43, &HA3014314  
II b, c, d, a, x(k + 13), S44, &H4E0811A1  
II a, b, c, d, x(k + 4), S41, &HF7537E82  
II d, a, b, c, x(k + 11), S42, &HBD3AF235  
II c, d, a, b, x(k + 2), S43, &H2AD7D2BB  
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 

MD5 = LCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))  
End Function