encryption over tcp

[emoyasha]

okay i am encrypting messages over tcp

receiving end:

$detext = _StringEncrypt( 0, $sText, "0044", 2)
                                $sText = $detext
                                $sText = "<i>"&"<img src=" & $image & ">"  &  $sUsername & ' says:</i><br><table width="95%"  border="0" align="center"><tr><td><font face="Verdana" size=-1>' & FormatChat($sText) & "</td></tr></table>"oÝ÷ Úǧv)àzwZºÚ"µÍÌÍÙ]^HÔÝ[Ñ[Ü
K   ÌÍÝ^ ][ÝÌ

    ][ÝËBBBBHBBBUÔÙ[
    ÌÍÔÛØÚÙ] ÌÍÓQTÔÐQÑH    [È ][ÝÈ  ][ÝÈ  [È ÌÍÐÚ[ÛÛØ][ÛÉÌÍÞWH   [È ][ÝÈ^ ][ÝÈ  [È ÌÍÙ]^

this works almost perfect however on the receiving end, a number or strange unicode object will show up at the end of every received sentence, i mean its not to bad, but i want to know how to stop it. an example is attached.

log.htm

[emoyasha]

i would edit my post and tell you this, however when i went to edit it, it turned all to Unicode characters, dose anyone else have that problem? but that is a log of me sending messages to myself and receiving them. (i also noticed the Unicode character thats at the end depends on how many characters are send, liek one letter or number appends a + to the end five letters and numbers add a 7 four ad"..." six add nothing seven add this weird bar thing. so i hope that info helpssps

Edited February 9, 2008 by emoyasha

[BrettF]

i would edit my post and tell you this, however when i went to edit it, it turned all to unicode charachters, dose anyone else have that problem? but that is a log of me sending message sto myself and receiving them.

Known problem with the AutoIt code boxes...

[emoyasha]

okay i didnt wanna get yelled at by someone, lol, i probably will for this post though, but can you offer any advice?

[BrettF]

Read http://www.autoitscript.com/forum/index.ph...=_StringEncrypt

There was an alt option posted somewhere...

[emoyasha]

but what is causing it

[BrettF]

Dropped packets, could be anything. Is there any other parsing done to the text sent/recived?

[emoyasha]

well when send it split from one peice of data into four peices

[emoyasha]

one of the four pieces being the text to be decrypted, i dont think its dropped packets cause there are exter things at theend, maybe the string addign extra characters, or spaces, i dunno why it would be happening

edit:

- okay i noticed they used text to binary and back, this fairly good however

it just dosent meet the standards binary is way to easy to break.

are there any simple encryption udfs avalable

Edited February 9, 2008 by emoyasha

[erezlevi]

do you have a sniffer on your PC ? it can help alot to see what you relly recieving. your "unicode" char indicate that you are using perhaps a window chat with ANSI support is it ? those char should be the position of where to put the words in the screen. chr(27) indicates an Escape ("")

[BrettF]

Like I said, look in that thread for an alternitave that was suggested.

[PsaltyDS]

Instrument your script, something like this:

; ...xmt
$sMsg = "$stext = " & $text & @CRLF
$etext = _StringEncrypt( 1, $text, "0044", 2)
$sMsg &= "$etext = " & $etext
MsgBox(64, "Debug: Transmit", $sMsg)
TCPSend($Socket, $MESSAGE & " " & $ChildConversation[$y] & " Text " & $etext )


; ...rcv
$sMsg = "$sText = " & $sText & @CRLF
$detext = _StringEncrypt( 0, $sText, "0044", 2)
$sMsg &= "$detext = " & $detext & @CRLF
$sText = $detext
$sText = "<i>"&"<img src=" & $image & ">"  &  $sUsername & _
    ' says:</i><br><table width="95%"  border="0" align="center"><tr><td><font face="Verdana" size=-1>' & _
    FormatChat($sText) & "</td></tr></table>"
$sMsg &= "$sText = " & $sText
MsgBox(64, "Debug: Receive", $sMsg)

If the problem is intermittent, then log this info to a file vice messages boxes, so you can go back and look for the problem when it fails.

I notice you are NOT sending just what you are using in the recv script. But if the undisclosed process of adding/stripping the $MESSAGE/$ChildConversation[$y]/"Text" off of the string is failing, it will be obvious from the debug values.

[emoyasha]

i fixed it

$stext = stringtrimright( $stext, 1)

because the character was always one letter to the right