Encryption Problem

I am in the process of porting a java encryption routine into visual basics..
for the past month now I've had an on-gowing discussion with a user on this forum and he has helped me out a great deal but I think he has givin up on me? perhaps for my lack of understanding I am not sure.

anyways

this is the Java Routines

Code:

---

private void s(String s1)
    {
private final String b_java_lang_String_array1d_fld[] = { "LHKf24()", "..FWSqw1", "783vcSWr", "NSW%FGS3", "S834VS$!"};
     

  StringTokenizer stringtokenizer = new StringTokenizer(s1 + "#", "#");
        BitSet bitset = new BitSet(64);
        for(int i1 = 0; i1 < 5; i1++)
        {
            BitSet bitset1 = a(b_java_lang_String_array1d_fld[i1].toCharArray());
            int j1 = Integer.parseInt(stringtokenizer.nextToken());
            for(int l1 = 0; l1 < j1; l1++)
                bitset1 = a(bitset1);

            bitset.xor(bitset1);
        }

        char ac[] = a(bitset, 8);
        for(int k1 = 0; k1 < 8; k1++)
            if(ac[k1] == 0 || ac[k1] == '\n' || ac[k1] == '\r')
                ac[k1] = (char)(ac[k1] | 0x80);

        try
        {
            a_java_io_DataOutputStream_fld.writeBytes("~b#9#");
            for(int i2 = 0; i2 < ac.length; i2++)
                a_java_io_DataOutputStream_fld.write((byte)(ac[i2] & 0xff));

            a_java_io_DataOutputStream_fld.writeBytes("\n");
        }
        catch(Exception exception)
        {
            a(1);
        }
    }

private BitSet a(BitSet bitset)
    {
        BitSet bitset1 = new BitSet(64);
        boolean flag = false;
        for(int i1 = 0; i1 < 64; i1++)
        {
            if(flag != bitset.get(i1))
                bitset1.set(i1);
            flag = bitset.get(i1);
        }

        return bitset1;
    }

private BitSet a(char ac[])
    {
        int i1 = ac.length * 8;
        BitSet bitset = new BitSet(i1);
        for(int j1 = 0; j1 < i1; j1++)
        {
            int k1 = j1 & 7;
            int l1 = j1 >> 3;
            if((ac[l1] & 0xff & 1 << 7 - k1) != 0)
                bitset.set(j1);
        }

        return bitset;
    }

private char[] a(BitSet bitset, int i1)
    {
        int j1 = i1 * 8;
        char ac[] = new char[i1];
        for(int k1 = 0; k1 < j1; k1++)
        {
            int l1 = k1 & 7;
            int i2 = k1 >> 3;
            if(bitset.get(k1))
                ac[i2] = (char)(ac[i2] | 1 << 7 - l1);
        }

        return ac;
    }

---

so far I have been able to mimic the bitset class in visual basics using the follow class routines

VB Code:

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
END
Attribute VB_Name = "Bit_Vec"
Attribute VB_Creatable = True
Attribute VB_Exposed = True
 
Option Explicit
DefInt A-Z
 
Const CLASS_NAME = "Bit_Vec"
Const CLASS_VERSION = "100"
 
 
 
 
 
Const vbErrSubscriptOutOfRange = 9
 
Const BITS_PER_ELEMENT = 8
 
 
Private mBits()      As Byte
Private mNumElements As Long
 
 
Private Sub Class_Initialize()
 
End Sub
 
 
Private Sub Class_Terminate()
    
    Erase mBits
 
End Sub
 
 
 
Public Property Let NumElements(NewValue As Long)
    
   
    
    mNumElements = NewValue
    ReDim Preserve mBits(mNumElements \ BITS_PER_ELEMENT)
   
End Property
 
 
Public Property Get NumElements() As Long
    
    NumElements = mNumElements
 
End Property
 
 
'------------------------------------------------------
'-- METHODS
'------------------------------------------------------
 
Public Sub ClearAll()
    Dim i As Long
    
    '-- Set bit values in BITS_PER_ELEMENT chunks for speed
    For i = LBound(mBits) To UBound(mBits)
        mBits(i) = &H0
    Next i
    
End Sub
 
Public Sub ClearBit(Index As Long)
'-- Set Bit(Index) value to 0
    Dim ArrayIdx As Long
    Dim Bit      As Long
    
    Call ValidateIndex(Index)
    
    ArrayIdx = Index \ BITS_PER_ELEMENT
    Bit = Index Mod BITS_PER_ELEMENT
    'Debug.Print "Clearing ArrayIdx:"; ArrayIdx, " Bit:"; Bit
    mBits(ArrayIdx) = mBits(ArrayIdx) And (Not (2 ^ Bit))
    
End Sub
 
 
Public Function GetBit(Index As Long) As Integer
'-- Returns 0 or 1
    
    Call ValidateIndex(Index)
    
    If IsBitSet(Index) Then
        GetBit = 1
    Else
        GetBit = 0
    End If
    
End Function
 
 
Public Function IsBitSet(Index As Long) As Boolean
    Dim ArrayIdx As Long
    Dim Bit      As Long
    
    Call ValidateIndex(Index)
    
    ArrayIdx = Index \ BITS_PER_ELEMENT
    Bit = Index Mod BITS_PER_ELEMENT
    'Debug.Print "Testing ArrayIdx:"; ArrayIdx, " Bit:"; Bit
    If mBits(ArrayIdx) And 2 ^ Bit Then
        IsBitSet = True
    Else
        IsBitSet = False
    End If
 
End Function
 
 
Public Sub SetAll()
    Dim i As Long
    
    '-- Set bit values in BITS_PER_ELEMENT chunks for speed
    For i = LBound(mBits) To UBound(mBits)
        mBits(i) = &HFF
    Next i
    
End Sub
 
 
Public Sub SetBit(Index As Long)
'-- Set Bit(Index) value to 1
    Dim ArrayIdx As Long
    Dim Bit      As Long
    
    Call ValidateIndex(Index)
    
    ArrayIdx = Index \ BITS_PER_ELEMENT
    Bit = Index Mod BITS_PER_ELEMENT
    'Debug.Print "Setting ArrayIdx:"; ArrayIdx, " Bit:"; Bit
    mBits(ArrayIdx) = mBits(ArrayIdx) Or 2 ^ Bit
 
End Sub
 
 
Public Sub ToggleBit(Index As Long)
'-- Toggle the value of Bit(Index)
    
    Call ValidateIndex(Index)
    
    If IsBitSet(Index) Then
        Call ClearBit(Index)
    Else
        Call SetBit(Index)
    End If
    
End Sub
 
 
 
 
Private Sub ValidateIndex(Index As Long)
    
    '-- Our bounds checking code is aware that this is
    '   a 0 based array of bits.
    If (Index < 0) Or (Index > (mNumElements - 1)) Then
        RaiseError vbErrSubscriptOutOfRange
    End If
 
End Sub
 
 
'------------------------------------------------------
'-- ERRORS
'------------------------------------------------------
 
' .GetErrorDesc
Private Function GetErrorDesc(ErrCode As Long) As String
    Dim Desc As String
    
    Select Case ErrCode
        Case vbErrSubscriptOutOfRange
            Desc = "Subscript out of Range"
        Case Else
            Desc = "Unknown error"
    End Select
    
    GetErrorDesc = Desc
    
End Function
 
 
' .RaiseError
Private Sub RaiseError(ErrCode As Long)
        
    Err.Raise Number:=vbObjectError + ErrCode, _
              Source:=CLASS_NAME & " " & CLASS_VERSION, _
              Description:=GetErrorDesc(ErrCode)
 
End Sub

and with a bit of help from the other user on this forum I have been able to mimic most of the java procedures in such a fashion

VB Code:

Private Sub cmdTest1_Click()
Dim BitSet1 As BitVector
Dim BitSet As New BitVector
Dim HashArray() As String
Dim ac As String
Dim ParsedNumArray() As String
Dim i1, jtemp, j1 As Integer
    BitSet.NumElements = 64
    HashArray() = Split("LHKf24(),..FWSqw1,783vcSWr,NSW%FGS3,S834VS$!", ",")
    ParsedNumArray() = Split("58#54#58#42#50#", "#")
 
For i1 = 0 To 4
    Set BitSet1 = BitShift(HashArray(i1))
    
        j1 = Val(ParsedNumArray(i1))
        
        For l1 = 0 To j1
            Set BitSet1 = BitFlag(BitSet1)
        Next
        For x = 0 To 63
            BitSet.SetBit (CLng(x)) Xor BitSet1.GetBit(CLng(x))
        Next
        
Next i1
 
 
ac = Characterize(BitSet, 8)
 
End Sub
 
Private Function BitShift(ac As String) As BitVector
Dim i1 As Integer
Dim k1 As Integer
Dim l1 As Integer
Dim TempBitSet1 As BitVector
Set TempBitSet1 = New BitVector
 
    i1 = Len(ac) * 8
    TempBitSet1.NumElements = i1
    For j1 = 0 To i1
        k1 = j1 & 7
        l1 = j1 \ 8
        If l1 <> 8 Then If (Asc(Mid(ac, l1 + 1, 1)) And &HFF And 128 - k1) <> 0 Then TempBitSet1.SetBit (j1)
        Print
    Next j1
    Set BitShift = TempBitSet1
End Function
 
Private Function BitFlag(BitSet As BitVector) As BitVector
Dim BitSet1 As BitVector
Dim Flag As Boolean
Dim i1 As Integer
Set BitSet1 = New BitVector
    BitSet1.NumElements = 64
    
    Flag = False
    For i1 = 0 To 63
        If Flag <> BitSet.GetBit(CLng(i1)) Then BitSet1.SetBit (CLng(i1))
        Flag = BitSet.GetBit(CLng(i1))
    Next i1
Set BitFlag = BitSet1
End Function
 
 
 
Private Function Characterize(BitSet As BitVector, i1 As Integer) As String
    Dim ji, k1, l1, i2 As Integer
    Dim ac As String
    j1 = i1 * 8
    ac = String(i1, 0)
    For k1 = 0 To j1 - 1
        l1 = k1 And 7
        i2 = k1 \ 8
        If BitSet.get(k1) Then  Mid$(ac, i2 + 1, 1) = Chr(Asc(Mid$(ac, i2 + 1, 1)) Or 128 - l1)
        End If
    Next k1
    Characterize = ac
End Function

the java routines take in a string such as
"#58#54#58#42#50#"

and produces the following
"~b#9#XZ?›aÅXÞ"

so far my vb routine returns 2 characters. a Null character and a [] block character.

I've had no luck proceeding any further I do believe my problem is the XOR procedure but I could be wrong...


any help on this matter would be more than greatly appriciated.

P.S.
the previous post on the vb forum is http://www.vbforums.com/showthread.p...0&pagenumber=1

thanx

Quote:

---

for the past month now

---

In that time you could have learned Java properly, which would enable you to convert this thing without help. Converting code from one language to another, especially converting bit manipulation to VB, is very boring, so people don't often help out with it. Sorry.

Yes Corned be is right. Unless someone that posts in this forum knows Visual Basic and Java i doubt you will be able to get any help that is worth anything.

Instead of writing your own routine why not just use some of the Encryption functionality that is built into VB? I used to write my own encryption code from scratch but what is the point of doing all of the work when i can simple use the classes that are contained in the JCE. :D

I've been working with both vb and java for quite some time now... and in most cases I've been able to port nearly everything from java to vb..how ever I am experiencing difficulties with this particular encryption method.

any one have any idea where I might be screwing up at?

:( :( :rolleyes:

If both Dilenger and me are unable to help, then it is very unlikely that you will get help. Nearly no one else browses this forum, so bumping won't do much good.