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jrdmb/SHA-256 VBScript.vbs

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VBScript code for SHA-256 hash
Raw
SHA-256 VBScript.vbs
'also see: https://gist.github.com/anonymous/573a875dac68a4af560d
Option Explicit
Dim intValid
Dim objMD5, objSHA256
Dim strAlgorithm, strHash, strString
intValid = 0
With WScript.Arguments.Named
If .Count <> 2 Then Syntax
If .Exists("A") Then
strAlgorithm = UCase( .Item("A") )
intValid = intValid + 1
End If
If .Exists("S") Then
strString = .Item("S")
intValid = intValid + 1
End If
End With
If intValid <> WScript.Arguments.Count Then Syntax
Select Case strAlgorithm
Case "MD5"
Set objMD5 = New MD5
strHash = objMD5.hash( strString )
Set objMD5 = Nothing
Case "SHA256", "SHA-256"
Set objSHA256 = New SHA256
strHash = objSHA256.SHA256( strString )
Set objSHA256 = Nothing
Case Else
Syntax
End Select
WScript.Echo strHash
Sub Syntax
Dim strMsg
strMsg = vbCrLf _
& "StringHash.vbs, Version 1.00" _
& vbCrLf _
& "Get the MD5 or SHA-256 hash value for the specified string" _
& vbCrLf & vbCrLf _
& "Usage: CSCRIPT //NoLogo StringHash.vbs /A:hashAlgorithm /S:""string""" _
& vbCrLf & vbCrLf _
& "Where: hashAlgorithm is either MD5 or SHA256" _
& vbCrLf _
& " string must be enclosed in doublequotes if it contains spaces" _
& vbCrLf & vbCrLf _
& "Note: This script uses the MD5 and SHA256 classes by Frez Systems Limited," _
& vbCrLf _
& " http://www.frez.co.uk, which were adapted for use in VBScript" _
& vbCrLf _
& " by Michal Gabrukiewicz (MD5) and Rob van der Woude (SHA-256)" _
& vbCrLf & vbCrLf _
& "Written by Rob van der Woude" _
& vbCrLf _
& "http://www.robvanderwoude.com"
WScript.Echo strMsg
WScript.Quit 1
End Sub
'*********************************************************
'** Code modified for use as class by Rob van der Woude **
'** http://www.robvanderwoude.com **
'*********************************************************
' See the VB6 project that accompanies this sample for full code comments on how
' it works.
'
' ASP VBScript code for generating a SHA256 'digest' or 'signature' of a string. The
' MD5 algorithm is one of the industry standard methods for generating digital
' signatures. It is generically known as a digest, digital signature, one-way
' encryption, hash or checksum algorithm. A common use for SHA256 is for password
' encryption as it is one-way in nature, that does not mean that your passwords
' are not free from a dictionary attack.
'
' If you are using the routine for passwords, you can make it a little more secure
' by concatenating some known random characters to the password before you generate
' the signature and on subsequent tests, so even if a hacker knows you are using
' SHA-256 for your passwords, the random characters will make it harder to dictionary
' attack.
'
' NOTE: Due to the way in which the string is processed the routine assumes a
' single byte character set. VB passes unicode (2-byte) character strings, the
' ConvertToWordArray function uses on the first byte for each character. This
' has been done this way for ease of use, to make the routine truely portable
' you could accept a byte array instead, it would then be up to the calling
' routine to make sure that the byte array is generated from their string in
' a manner consistent with the string type.
'
' This is 'free' software with the following restrictions:
'
' You may not redistribute this code as a 'sample' or 'demo'. However, you are free
' to use the source code in your own code, but you may not claim that you created
' the sample code. It is expressly forbidden to sell or profit from this source code
' other than by the knowledge gained or the enhanced value added by your own code.
'
' Use of this software is also done so at your own risk. The code is supplied as
' is without warranty or guarantee of any kind.
'
' Should you wish to commission some derivative work based on this code provided
' here, or any consultancy work, please do not hesitate to contact us.
'
' Web Site: http://www.frez.co.uk
' E-mail: sales@frez.co.uk
Class SHA256
Private m_lOnBits(30)
Private m_l2Power(30)
Private K(63)
Private BITS_TO_A_BYTE
Private BYTES_TO_A_WORD
Private BITS_TO_A_WORD
Private Sub Class_Initialize()
BITS_TO_A_BYTE = 8
BYTES_TO_A_WORD = 4
BITS_TO_A_WORD = 32
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)
K(0) = &H428A2F98
K(1) = &H71374491
K(2) = &HB5C0FBCF
K(3) = &HE9B5DBA5
K(4) = &H3956C25B
K(5) = &H59F111F1
K(6) = &H923F82A4
K(7) = &HAB1C5ED5
K(8) = &HD807AA98
K(9) = &H12835B01
K(10) = &H243185BE
K(11) = &H550C7DC3
K(12) = &H72BE5D74
K(13) = &H80DEB1FE
K(14) = &H9BDC06A7
K(15) = &HC19BF174
K(16) = &HE49B69C1
K(17) = &HEFBE4786
K(18) = &HFC19DC6
K(19) = &H240CA1CC
K(20) = &H2DE92C6F
K(21) = &H4A7484AA
K(22) = &H5CB0A9DC
K(23) = &H76F988DA
K(24) = &H983E5152
K(25) = &HA831C66D
K(26) = &HB00327C8
K(27) = &HBF597FC7
K(28) = &HC6E00BF3
K(29) = &HD5A79147
K(30) = &H6CA6351
K(31) = &H14292967
K(32) = &H27B70A85
K(33) = &H2E1B2138
K(34) = &H4D2C6DFC
K(35) = &H53380D13
K(36) = &H650A7354
K(37) = &H766A0ABB
K(38) = &H81C2C92E
K(39) = &H92722C85
K(40) = &HA2BFE8A1
K(41) = &HA81A664B
K(42) = &HC24B8B70
K(43) = &HC76C51A3
K(44) = &HD192E819
K(45) = &HD6990624
K(46) = &HF40E3585
K(47) = &H106AA070
K(48) = &H19A4C116
K(49) = &H1E376C08
K(50) = &H2748774C
K(51) = &H34B0BCB5
K(52) = &H391C0CB3
K(53) = &H4ED8AA4A
K(54) = &H5B9CCA4F
K(55) = &H682E6FF3
K(56) = &H748F82EE
K(57) = &H78A5636F
K(58) = &H84C87814
K(59) = &H8CC70208
K(60) = &H90BEFFFA
K(61) = &HA4506CEB
K(62) = &HBEF9A3F7
K(63) = &HC67178F2
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 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 Ch(x, y, z)
Ch = ((x And y) Xor ((Not x) And z))
End Function
Private Function Maj(x, y, z)
Maj = ((x And y) Xor (x And z) Xor (y And z))
End Function
Private Function S(x, n)
S = (RShift(x, (n And m_lOnBits(4))) Or LShift(x, (32 - (n And m_lOnBits(4)))))
End Function
Private Function R(x, n)
R = RShift(x, CInt(n And m_lOnBits(4)))
End Function
Private Function Sigma0(x)
Sigma0 = (S(x, 2) Xor S(x, 13) Xor S(x, 22))
End Function
Private Function Sigma1(x)
Sigma1 = (S(x, 6) Xor S(x, 11) Xor S(x, 25))
End Function
Private Function Gamma0(x)
Gamma0 = (S(x, 7) Xor S(x, 18) Xor R(x, 3))
End Function
Private Function Gamma1(x)
Gamma1 = (S(x, 17) Xor S(x, 19) Xor R(x, 10))
End Function
Private Function ConvertToWordArray(sMessage)
Dim lMessageLength
Dim lNumberOfWords
Dim lWordArray()
Dim lBytePosition
Dim lByteCount
Dim lWordCount
Dim lByte
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 = (3 - (lByteCount Mod BYTES_TO_A_WORD)) * BITS_TO_A_BYTE
lByte = AscB(Mid(sMessage, lByteCount + 1, 1))
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(lByte, lBytePosition)
lByteCount = lByteCount + 1
Loop
lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (3 - (lByteCount Mod BYTES_TO_A_WORD)) * BITS_TO_A_BYTE
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(&H80, lBytePosition)
lWordArray(lNumberOfWords - 1) = LShift(lMessageLength, 3)
lWordArray(lNumberOfWords - 2) = RShift(lMessageLength, 29)
ConvertToWordArray = lWordArray
End Function
Public Function SHA256(sMessage)
Dim HASH(7)
Dim M
Dim W(63)
Dim a
Dim b
Dim c
Dim d
Dim e
Dim F
Dim g
Dim H
Dim i
Dim j
Dim T1
Dim T2
HASH(0) = &H6A09E667
HASH(1) = &HBB67AE85
HASH(2) = &H3C6EF372
HASH(3) = &HA54FF53A
HASH(4) = &H510E527F
HASH(5) = &H9B05688C
HASH(6) = &H1F83D9AB
HASH(7) = &H5BE0CD19
M = ConvertToWordArray(sMessage)
For i = 0 To UBound(M) Step 16
a = HASH(0)
b = HASH(1)
c = HASH(2)
d = HASH(3)
e = HASH(4)
f = HASH(5)
g = HASH(6)
h = HASH(7)
For j = 0 To 63
If j < 16 Then
W(j) = M(j + i)
Else
W(j) = AddUnsigned(AddUnsigned(AddUnsigned(Gamma1(W(j - 2)), W(j - 7)), Gamma0(W(j - 15))), W(j - 16))
End If
T1 = AddUnsigned(AddUnsigned(AddUnsigned(AddUnsigned(h, Sigma1(e)), Ch(e, f, g)), K(j)), W(j))
T2 = AddUnsigned(Sigma0(a), Maj(a, b, c))
h = g
g = f
f = e
e = AddUnsigned(d, T1)
d = c
c = b
b = a
a = AddUnsigned(T1, T2)
Next
HASH(0) = AddUnsigned(a, HASH(0))
HASH(1) = AddUnsigned(b, HASH(1))
HASH(2) = AddUnsigned(c, HASH(2))
HASH(3) = AddUnsigned(d, HASH(3))
HASH(4) = AddUnsigned(e, HASH(4))
HASH(5) = AddUnsigned(f, HASH(5))
HASH(6) = AddUnsigned(g, HASH(6))
HASH(7) = AddUnsigned(h, HASH(7))
Next
SHA256 = LCase(Right("00000000" & Hex(HASH(0)), 8) & Right("00000000" & Hex(HASH(1)), 8) & Right("00000000" & Hex(HASH(2)), 8) & Right("00000000" & Hex(HASH(3)), 8) & Right("00000000" & Hex(HASH(4)), 8) & Right("00000000" & Hex(HASH(5)), 8) & Right("00000000" & Hex(HASH(6)), 8) & Right("00000000" & Hex(HASH(7)), 8))
End Function
End Class
'**************************************************************************************************************
'* ajaxed Copyright (C) 2003
'* License refer to license.txt
'**************************************************************************************************************
'**************************************************************************************************************
'' @CLASSTITLE: MD5
'' @CREATOR: Michal Gabrukiewicz - gabru @ grafix.at
'' @CREATEDON: 29.12.2007
'' @CDESCRIPTION: Thats a class for MD5 encryption.
'' MD5: Derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm,
'' as set out in the memo RFC1321. One way encryption!
'' Encryption-code taken from Web Site: http://www.frez.co.uk and modified to a class. Many thanks!
'' @VERSION: 0.1
'**************************************************************************************************************
Class MD5
Private BITS_TO_A_BYTE
Private BYTES_TO_A_WORD
Private BITS_TO_A_WORD
Private P_ALGORITHM
Private m_lOnBits(30)
Private m_l2Power(30)
'Construktor => set the default values
Private sub Class_Initialize()
BITS_TO_A_BYTE = 8
BYTES_TO_A_WORD = 4
BITS_TO_A_WORD = 32
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)
end sub
'**********************************************************************************************************************
'' @SDESCRIPTION: returns a MD5 hash for the given value
'' @PARAM: val [string]: the string for hashing
'' @RETURN: [string] MD5 hash
'**********************************************************************************************************************
Public Function hash(val)
hash = MD5(val & "")
End Function
'**********************************************************************************************************************
'* LShift
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* RShift
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* RotateLeft
'**********************************************************************************************************************
Private Function RotateLeft(lValue, iShiftBits)
RotateLeft = LShift(lValue, iShiftBits) Or RShift(lValue, (32 - iShiftBits))
End Function
'**********************************************************************************************************************
'* AddUnsigned
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* F
'**********************************************************************************************************************
Private Function F(x, y, z)
F = (x And y) Or ((Not x) And z)
End Function
'**********************************************************************************************************************
'* G
'**********************************************************************************************************************
Private Function G(x, y, z)
G = (x And z) Or (y And (Not z))
End Function
'**********************************************************************************************************************
'* H
'**********************************************************************************************************************
Private Function H(x, y, z)
H = (x Xor y Xor z)
End Function
'**********************************************************************************************************************
'* I
'**********************************************************************************************************************
Private Function I(x, y, z)
I = (y Xor (x Or (Not z)))
End Function
'**********************************************************************************************************************
'* FF
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* GG
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* HH
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* II
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* ConvertToWordArray
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* WordToHex
'**********************************************************************************************************************
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
'**********************************************************************************************************************
'* md5
'**********************************************************************************************************************
Private 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
End Class
#VBA #Encryption
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