php licence file question

rr1024

Hello all thanks for reading my post

I've purchase scripts that require me to enter my url that the php script will be installed. Then they generate a licence file which you have to down load and place in some directory or another.

I've now writen my own little script which I'll be offering free of charge. However, I do not want the user to remove my copywrite link back to my site. So, I figured if I can have the register and generate a licence file so the script will only work on their site that the script is running on then I can at least track who has what have a little bot check to see if the link back is ok or not. Maybe even something that encrypts the link back and makes it part of the licence file?

So does anyone know how to do something like this, or the best approach / software ect...

I basically know enough to write my own banner / link exchange script but little else so bare with me if I have a few more questions...
Thanks

kireol

there are php confabulators out there. i'm not sure confabulator is the right word, but it basically encrypts the code and makes it damn near impossible to read. I bought one for $10 and it works perfectly. http://sourcecop.com/ i think you can also makes licenses so it only runs on specified web sites or expires after X days IIRC. havent used it in a while. there is a demo there too. hope that helps

mjax

SourceCop is not very secure. A few weeks ago I build a generic SourceCop decryptor within 2 hours.

kireol

mjax wrote:
SourceCop is not very secure. A few weeks ago I build a generic SourceCop decryptor within 2 hours.

PHP is not a compiled language. nothing you could do is secure. so what are you saying? even if you did decrypt it, it's still left with meaningless variable names. Or are you just a thread crapper?

mjax

kireol wrote:
PHP is not a compiled language. nothing you could do is secure. so what are you saying? even if you did decrypt it, it's still left with meaningless variable names. Or are you just a thread crapper?

SourceCop just encrypts PHP source code using a private key. Once you have this key and the decryption algorithm, you can easily rebuild the original PHP code, including original variable names.

I'm no thread crapper (see my post history). All I want to do in this thread is point out that SourceCop is far from secure and will only stop nosey eyes, not prohibit your source code from ever being seen.

rr1024

Do you know if any of these source cryption programs offer some type of lic file generation.

Keep in mind all I want to do is be able to encrypt my copy write and link that points back to my site. Then from some web page on my site allow users to plug in their URL and have the script output a unique License.php file. This file would need to be present and correct in order for the script to run.

I have no problem writing little scripts for other webmasters to use on their sites for free....But IF I'm going to use my time to create a free script then I want a little PR love in return if they use my script...

So has one worked on or know anything about doing something like this? Is that what these code locking programs do and if so how do these other website create these lic.php files so scripts won't run???

Another issue is if it will allow or does lic.php type file can I give each script a unique lic file name...i.e.

If I set my directory up to keep all licence files in directory /lic
however if a webmaster uses 3 of my script well then each licence file could not be named lic.php or licence.php it would need to be something like

survey_lic.php
blog_lic.php
shoutbox_lic.php
ect....

rr1024

Also the licence generation for users of the script should be handled online of course, I think kind of like

http://www.btt-scripts.com/bttlicense/ I'm not sure if this is what i'm looking for or not...it seem like the data base for the lic is actually handled by them which is not a good thing esp if I'm trying to just do something small and free and if there data base goes down then everyone on the web using your script can't use your script anymore and that would just suck!

I think the above url does it but I could not see how or if it would do any encryption...Of course I don't want to encypte all files just the section for the link back to my site and have that maybe located in the licence file...of course this maybe impossible since I started generating my scripts in smarty and with the template thing I don't see how it could stop someone from going to the template and commenting out the {footerbacklink} which would be the back link to my site...It seems there should be a solution to this problem?