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Posted: Dec 05, 2009 10:23:22 am
Lupin



Quote:
I start here a new topic for reporting about encryption php script
I think it's a very different section for xbtitfm dev than coding
for me it will be more accurate for encryption progression and for you more readable.

After few hours and many cigarettes(the help file is very xtra light) here's the first analyse of the beast.

PHTMLenc needs library to work (encoding and of course decoding on web server)
The version we have is given with sources libs:
--We can compile our own lib(I define myself the key encryption) for encoding and bind the script to a IP (with the last version i can bind to a spec machineID but I think it's not accurate for our project.asa a hardware is changed on machine its ID changes).
--Monthly restriction can be exploited but headache for me (recomplilng a lib and reencoding scripts for each costumer with specific IP each month)
To compile it I need the php version of the host (one source for each php version and i do not try yet if for eg a phpversion 5.2.10 can use a 5.2.4 encryption lib to work on host) and the host IP to bind the script

How encoded scripts can be usable by the host:

2 ways
1- "self decodable script" 1st way I tried
Advantage:
nothing to do for the customer and ready to use
Disadvantages:
---don't work with apache2 servers because of multithread so only available with apache1.x server


Warning
dl() [function.dl]: Not supported in multithreaded Web servers - use extension=phtmlenc5.2.10.dll in your php.ini in C:

Warning:  Unexpected character in input:  '' (ASCII=92) state=1 in /home/sites2/site93/www/UPB/includes/inc/post.inc.php on line 151

Program Files (x86)

Warning:  Unexpected character in input:  '' (ASCII=92) state=1 in /home/sites2/site93/www/UPB/includes/inc/post.inc.php on line 151

EasyPHP5.2.10

Warning:  Unexpected character in input:  '' (ASCII=92) state=1 in /home/sites2/site93/www/UPB/includes/inc/post.inc.php on line 151

www

Warning:  Unexpected character in input:  '' (ASCII=92) state=1 in /home/sites2/site93/www/UPB/includes/inc/post.inc.php on line 151

test
.php on line 1
Unable to load phtmlenc5.2.10
.dll
?>



---The library is needed in each folder where a php file is encoded,
very heavy if we encode more than few files as if we can modify it to have only one time the library in a specific folder.
The encoded file always starts like this:


<?php if(!function_exists("phtmldec")) {$w=(substr(PHP_OS,0,3)=="WIN")?1:0;$ln="phtmlenc".phpversion();$cd=dirname(__FILE__);if($w){$ln=$ln.".dll";if($cd[1]==":"$cd=substr($cd,2);}else{$ln=$ln.".so";if(strlen($cd)<3$cd=getcwd();}if(version_compare(phpversion(),"5.2.5")==-1){$cd1=ini_get('extension_dir');$cd2=PHP_EXTENSION_DIR;if($cd[strlen($cd)-1]!="/")$cd=$cd."/";if($cd1[strlen($cd1)-1]!="/")$cd1=$cd1."/";if($cd2[strlen($cd2)-1]!="/")$cd2=$cd2."/";if($cd1[1]==":"$cd1=substr($cd1,2);if($cd2[1]==":"$cd2=substr($cd2,2);$ic=substr_count($cd,"\")+substr_count($cd,"/");$ic1=substr_count($cd1,"\")+substr_count($cd1,"/");$ic2=substr_count($cd2,"\")+substr_count($cd2,"/");$en=str_repeat("../",max($ic,$ic1,$ic2))."..".$cd.$ln;}else $en=$ln;$r=dl($en);if(!$r)exit("Unable to load $en");}
$p="here is your php code crypted";phtmldec($p);
?>


As you can see the encoder never use end of line  >:(

2- installation of library on the webhost
2ways:
--installation of php extensions:not very hard to do and low chance to modify server stability
Put the lib in php extension directory
add a line "extension=phtlmencx.x.x.dll" or (*.so for unix) in php.ini
--Replace PHP engine library: I think it will be a "bull *censor* generator"
original php4ts.dll (or *.so for unix)replaced (and I didn't see sources in phtmlenc packages to compil it)
Advantage:
-we can encode all the xbtitfm project without increase structure complexity
-dll compilation and script encoding only one time for each costumer
Disadvantage:
the costumer must modify the php config on his host
May installation be easier with a *.bat file (*.sh for unix)


I must try this method but not modify easyPHP yet
i'll post here how I progress
Your comments and opinions are of course welcome

PS: I hope this post is clear enough  ;D


Any clue on this test?

If I have 1000 customers with different domain (of course) and php version which I need to update every month, It'll take me the full month to deliver the script to all customers?

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