Shulou(Shulou.com)06/03 Report--

This article mainly introduces VBS how to achieve MD5 encryption algorithm, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

The code is as follows:

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

M_l2Power (9) = CLng

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 ("Please enter password:")

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 (& H4000000\ 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 & H4000000

LY4 = lY And & H4000000

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 & H4000000 Then

LResult = lResult Xor & HC0000000 Xor lX8 Xor lY8

Else

LResult = lResult Xor & H4000000 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

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