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Jul 22nd, 2009, 12:46 PM
#1
Thread Starter
New Member
VB6 Security Issue
Hi,
I have a security issue with the program, and was wondering if there is a way to "encrypt" the program. Basically, if I compile a program I have made, then open it in notepad, I can see snippets of code. I understand that the form may be viewable, but I don't want the actual code viewable in notepad.
For example, if it create a new "Log In Dialogue", and put the following code:
Code:
Private Sub cmdOK_Click()
'check for correct password
If txtUserName = "Bob" And txtPassword = "ABC123" Then
'place code to here to pass the
'success to the calling sub
'setting a global var is the easiest
LoginSucceeded = True
Me.Hide
Else
MsgBox "Invalid Password, try again!", , "Login"
txtPassword.SetFocus
SendKeys "{Home}+{End}"
End If
End Sub
If I then compile the code, make the program, then open the program with notepad, I am given the following:
Code:
MZ ÿÿ ¸ @ ¸ º ´ Í!¸LÍ!This program cannot be run in DOS mode.
$ ŠùÛËë—ˆËë—ˆËë—ˆH÷™ˆÊë—ˆ¢ôžˆÊë—ˆ"ôšˆÊë—ˆRichËë—ˆ PE L ßMgJ à ¸ 0 @ P Ýà ”" ( @ ¤ ( ¨ .text ° `.data ø 0 0 @ À.rsrc ¤ @ @ @ @†¡H MSVBVM60.DLL Æ‘Qs9Qs1hRsbrRsú QsžOsQsÀ*Os® QsP\Qs=žOs~ÏOsFQsFQs>ÎNs‰]Qs.“Qs*aQsÏ™NsÚ“Ps6Qsâ™NsÓ“Qsà˜Ns$FPsÉQsúQsuRsk’QszQszQsEjPs®QséûPs¤5BsömRs ‘Qs-íPs„”QsQÛPsûOs º @ -"@ 4"@ ÿ%D@ ÿ%`@ ÿ%l@ ÿ%0@ ÿ% @ ÿ%t@ ÿ%@ ÿ%„@ ÿ%4@ ÿ%€@ ÿ%x@ ÿ%h@ ÿ%P@ ÿ%d@ ÿ%@ ÿ%@ ÿ%@ ÿ% @ ÿ%œ@ ÿ%p@ ÿ%@@ ÿ%X@ ÿ%˜@ ÿ%”@ ÿ%@ ÿ%8@ ÿ%*@ ÿ% @ ÿ%Œ@ ÿ%,@ ÿ%@ ÿ%|@ ÿ%(@ ÿ%L@ ÿ% @ ÿ%\@ ÿ%H@ ÿ%T@ ÿ%$@ ÿ%<@ ÿ%ˆ@ h@ èîÿÿÿ 0 @ œ[» øÔfI€¢^÷¼hA Project1 ÿÌ1 ›M§zçâêA‚uÃG‡Ù…* ÑVK*yµPŒÅq>:O*3™fÏ· ª `Ó“ a Y frmLogin
Login ¶Rˆ?®¤Ø?C "#ÿÿÿÿ$ Form1 & ' 5 ˜
¦ D Fÿ! txtUserName
‡ Y ÿ# cmdOK OK ïüt† ÿÿ+ cmdCancel Cancel 4üt† ÿÿ( txtPassword
Y " * (ÿ3 € lblLabels &User Name: i – 8 ÿ2 € lblLabels
&Password: i 8 ÿ P ›M§zçâêA‚uÃG‡ º @ L VB5!ð * ~
¨@ ð0 ÿÿÿ é Ä@ Ä@ Ä@ x Š ‹ Project1 Project1 Project1 ô ä@ @ @ "@ ð 0@ Æ@ 0@ * \ A P r o j e c t 1 Ä@ ,0@ Ì @ ÿÿÿÿ 0@ Ç€]kfI÷@—6Î*¶t§
8@ |@ @ ÿÿÿÿ¼@ p@ h@ ÿÿ ƒ€ frmLogin Project1 Ù…* ÑVK*yµPŒÅq>Kö˜†ÌJ—´’ñäSI›M§zçâêA‚uÃG‡àü¥gÄõxB¦Åa&r’#âN*3™fÏ· ª `Ó“txtUserName .=ûüú*h§8 +3qµC:\Program Files\Microsoft Visual Studio\VB98\VB6.OLB VB ä@ ô@ ,@ Ð2@ ¸Ã òN*3™fÏ· ª `Ó“cmdOK ÛN*3™fÏ· ª `Ó“lblLabels txtPassword :O*3™fÏ· ª `Ó“Form cmdCancel X
B o b áN*3™fÏ· ª `Ó“ A B C 1 2 3 8 I n v a l i d P a s s w o r d , t r y a g a i n !
L o g i n { H o m e } + { E n d } VBA6.DLL __vbaFreeVar __vbaFreeObj __vbaFreeVarList __vbaVarDup __vbaFreeObjList __vbaFreeStrList __vbaObjSet __vbaStrCmp __vbaHresultCheckObj ä@ Œ @ ÿÿÿÿ 8@ 0@ À „@ ˜@ „@ Œ@ ˆ@ Œ@ ·h l |@ ä2@ Ä„ ¨@ ¸@ @ 8 È@ Œ@ ¸y Ø@ @ < X@ @ Èy h@ @ @ p@ ` @ Øy €@ @ D È@ À @ ¸y Œ@ @ H ˜@ ÿÿÿÿ 8 @ èy ¨@ ÿÿÿÿ@ L X@ Ì @ Èy °@ ( @ 7 @ N @ [ @ Œ@ @ ’@ ˜@ ž@ ´@ @ ’@ ˜@ ž@ S @ Ü@ @ ’@ ˜@ ž@ @ @ ’@ ˜@ ž@ ,@ @ ’@ ˜@ ž@ T@ @ ’@ ˜@ ž@ F @ D$4 ¹¤@ ÿáD$4 ¹ª@ ÿál$K éý l$; é€ Œ @ p @ $ @ @ ø4 @ ÿÿÿÿ h @ d @ ` @ ` @ X ä@ ÿÿÿÿ ` @ ÿÿÿÿ 0@ È@ Ô2@ 0@ X@ Ø2@ p@ Ü2@ 0@ ˜@ à2@ LoginSucceeded ÌÌÌÌÌÌÌÌÌÌÌÌééééÌÌÌÌÌÌÌÌÌÌÌÌU‹ìƒì hÆ@ d¡ Pd‰% ƒì SVW‰eôÇEø¨@ ‹u‹Æƒà‰EüƒæþV‰u‹ÿQ‹3ÿVf‰~4ÿ’´ ;ÇÛâ}h´ hˆ@ VPÿ @ ‰}ü‹EP‹ÿQ‹Eü‹Mì_^d‰
[‹å] U‹ìƒì hÆ@ d¡ Pd‰% ì¬ SVW‰eôÇEø°@ ‹u‹Æƒà‰EüƒæþV‰u‹ÿQ‹3ÛV‰]è‰]ä‰]à‰]܉]̉]¼‰]¬‰]œ‰]Œ‰|ÿÿÿÿ’ü PEàPÿ(@ ‹øUèRW‹ÿ‘* ;ÃÛâ}h* hÔ@ WPÿ @ ‹Vÿ MÜPQÿ(@ ‹øEäPW‹ÿ’* ;ÃÛâ}h* hÔ@ WPÿ @ ‹MäQhè@ ÿL@ ‹Uè‹ø÷ßÿRGhÌ@ ÷ßÿL@ ÷ØÀMè@÷Ø#øEäPQjÿ|@ UÜEàRPjÿ@ ƒÄf;ût0‹VfÇF4ÿÿÿ‘´ ;ÃÛâý h´ hˆ@ VPÿ @ éæ ‹=Œ@ ¹ €‰M¤¸
‰M´•|ÿÿÿM¼‰Eœ‰E¬ÇE„<@ Ç…|ÿÿÿ ÿ×UŒMÌÇE”ü@ ÇEŒ ÿ×UœE¬RM¼PQUÌSRÿ,@ EœM¬PU¼QEÌRPjÿ @ ‹ƒÄVÿ‘ UàPRÿ(@ ‹ðV‹ÿ ;ÃÛâ}h hÔ@ VPÿ @ Màÿ*@ MÌÇEÔ €QhL@ ÇEÌ
ÿ8@ MÌÿ@ ‰]ühq"@ ë<UäEèRPjÿ|@ MÜUàQRjÿ@ EœM¬PU¼QEÌRPjÿ @ ƒÄ,ÃËEP‹ÿQ‹Eü‹Mì_^d‰
[‹å] žžžž¼" ÿÿÿÿÿÿÿÿd# r# |# Š# š# ®# ¾# Ò# à# ø# , €$ S €$ ($ W €2 €:$ D$ R$ f$ t$ ‚$ ˜$ ¢$ ¾$ Ô$ â$ ô$ % % $% 6% J% \% d €j% x% ‚% Œ% –% *% MSVBVM60.DLL _CIcos _adj_fptan __vbaFreeVar __vbaFreeVarList _adj_fdiv_m64 __vbaFreeObjList _adj_fprem1 __vbaHresultCheckObj _adj_fdiv_m32 __vbaObjSet _adj_fdiv_m16i _adj_fdivr_m16i _CIsin __vbaChkstk EVENT_SINK_AddRef __vbaStrCmp _adj_fpatan EVENT_SINK_Release _CIsqrt EVENT_SINK_QueryInterface __vbaExceptHandler _adj_fprem _adj_fdivr_m64 __vbaFPException _CIlog _adj_fdiv_m32i _adj_fdivr_m32i __vbaFreeStrList _adj_fdivr_m32 _adj_fdiv_r __vbaVarDup _CIatan _allmul _CItan _CIexp __vbaFreeObj ßMgJu X € @ € ( € ßMgJu € € ßMgJu ˜ € ßMgJu 1u à €2u È €3u ° € ßMgJu ø ßMgJu ßMgJu ßMgJu ( ßMgJu 8 PA ä ° 4C 0 ° dC ( ° ŒD è ° tG 0 ° ä4 V S _ V E R S I O N _ I N F O ½ïþ D V a r F i l e I n f o $ T r a n s l a t i o n °D S t r i n g F i l e I n f o 0 4 0 9 0 4 B 0 4 P r o d u c t N a m e P r o j e c t 1 ,
F i l e V e r s i o n 1 . 0 0 0
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As you can see, this is not the ideal security!
Is there a way to "encrypt" the program so it cannot be opened in notepad?
Best regards,
Leo
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