"Lyle Fairfield" <ly***********@aim.com> wrote in message
news:_3****************@read1.cgocable.net...
ChrB(X) simply returns a one byte string representation of X. It may be
difficult to print or see.
Chr(X) returns a two byte unicode representation of X which is easy to
print or see.
Since you are asking in a Password thread I'm guessing these one bytes are
easier, better to use in some kind of byte comparison or operation,
perhaps XOR in Western. There is not much point on operating on zeros as
every other byte.
If so, I'm guessing that just loading the string into a byte array would
be easier, but I'm speculating here.
Hi Lyle, thanks for your response. I'm right on the edge of my knowledge on
this so thanks for your patience. Here's the full code (you're right about
the XOR) - IIRC it originated from Micheal Kaplan (and I've probably spelt
that wrong). It works in A97 but not in A2k3. It seems to fall over where
the empty password array is set. Any help greatly appreciated. And before
anyone jumps in with the rights and wrongs of password cracking, I have a
genuine and legal use for a working version of this code.
Public Function StPasswordOfStDatabase(stDatabase As String) As String
Dim hFile As Integer
Dim ich As Integer
Dim stBuffer As String
Dim rgbytRaw() As Byte
Dim rgbytPassword() As Byte
Dim rgbytNoPassword() As Byte
' Create the byte array with the 20 bytes that are present when there
' is no database password
rgbytNoPassword = ChrB(134) & ChrB(251) & ChrB(236) & ChrB(55) &
ChrB(93) & _
ChrB(68) & ChrB(156) & ChrB(250) & ChrB(198)
& ChrB(94) & _
ChrB(40) & ChrB(230) & ChrB(19) & ChrB(182)
& ChrB(138) & _
ChrB(96) & ChrB(84) & ChrB(148) & ChrB(123)
& ChrB(54)
' Grab the 20 bytes from the real file whose password
' we are supposed to retrieve
hFile = FreeFile
Open stDatabase For Binary As #hFile
Seek #hFile, 66 + 1
rgbytRaw = InputB(20, #hFile)
Close #hFile
' Enough prep, lets get the password now.
ReDim rgbytPassword(0 To 19)
For ich = 0 To 19
rgbytPassword(ich) = rgbytRaw(ich) Xor rgbytNoPassword(ich)
Next ich
' Add a trailing Null so one will always be found, even if the password
is 20
' characters. Then grab up to the first null we find and return the
password
stBuffer = StrConv(rgbytPassword, vbUnicode) & vbNullChar
'StPasswordOfStDatabase = Left$(stBuffer, InStr(1, stBuffer, vbNullChar,
vbBinaryCompare) - 1)
StPasswordOfStDatabase = stBuffer
'To reveal the password, type this into the debug window: ?
StPasswordOfStDatabase("c:\foo.mdb")
'Where("c:\foo.mdb") is the path to and name of the db file
End Function
