SRL Archive - C#/Visual Basic Help and Tutorials

'Aight, so I'm trying to create a proxy with secure authetication. I've already got the components and the code together, however, I always seem to get an error when the server is trying to decrypt the clients authenticication message.

I'm using freddy's encryption algorithm, and it works perfectly. However, I always seem to get a runtime error and I don't know why :(.

Try running the project that I attached, and eventually it will give you an error message.

I'm coding this in VB and not PHP or some easier language because I don't want to intstall WAMP or something like that.

'Executed by Server to check server's print
Public Function CheckClientFingerPrint(FingerPrint As String) As Boolean
Dim tmp As String
    CheckClientFingerPrint = True
    tmp = Decrypt(FingerPrint, 5, 45)
    tmp = Decrypt(tmp, frmMain.LocalPort, 1001)
    If tmp = frmMain.PasswordServer Then
        frmMain.txtStatus.Text = frmMain.txtStatus.Text & vbCrLf & "Client fingerprint correct"
        SendServerFingerPrint
    Else
        CheckClientFingerPrint = False
        frmMain.netServer.SendData ("Wrong Password")
    End If
End Function

'Client sends own print
Public Sub SendClientFingerPrint()
Dim tmp As String
    tmp = Encrypt(frmMain.PasswordClient, frmMain.LocalPort, 1001)
    tmp = Encrypt(tmp, 5, 43)
    frmMain.netClient.SendData (tmp)
    frmMain.txtStatus.Text = frmMain.txtStatus.Text & vbCrLf & "Sent client's fingerprint"
End Sub

Hmm, you didn't seem to have used the same keys…
tmp = Decrypt(FingerPrint, 5, 45)
tmp = Encrypt(tmp, 5, 43)

My problem is of different nature: try running it, it won't be able to call the chr() in the proc decrypt, so it won't find the ASCII character. I just don't know why. Maybe it's a variable type error?

EDIT: Thanks, that fixed it. I misstyped the key :duh: .

EDIT 2: Now I'm getting another error: client thinks server fingerprint is wrong, wtf i dunno y. Dumb proxy, might as well wait and do it without auth. g2g catch some zzs now, its 2:13 am.