topic Re: Shell Script to EXE ??? in Operating System - HP-UX

Shell Script to EXE ???

Paul Murray — Thu, 01 Feb 2001 15:39:10 GMT

Hello Gurus,

Does anyone know of a tool that will safely encrypt a shell script but still leave it in an executable state ??

I have some shell scripts that include various security information that I would like to shield from prying eyes ......

Any ideas ??????

Regards,
Paul M.

Re: Shell Script to EXE ???

Sandor Horvath_2 — Thu, 01 Feb 2001 16:09:16 GMT

Hi !

I doesn't know any tool for this, but
You can put the secur information to file.
You can hide it anybody except root.
In Your shell script use
$(cat filename ) | ....
of course file permissions 400.

regards, Saa
ps: Your scripts rights can modify to 510 or 500 it depends who can run this script.

Re: Shell Script to EXE ???

James R. Ferguson — Thu, 01 Feb 2001 16:15:42 GMT

Hi Paul:

At least centralize and/or isolate the sensitive information in a file that your scripts source (read).

#!/usr/bin/sh
. /.includeme

...JRF...

Re: Shell Script to EXE ???

Dan Hetzel — Thu, 01 Feb 2001 16:25:55 GMT

Hi Paul,

Unfortunately, I never heard about such a 'shell script compiler'.

What you could do to hide your script, at least to the average user, is call it from a C program (with the system() call).
This C program could possibly do all setuid, setgid before calling the script.

Make sure your script has the right read/write permission.

This looks like 'quick and dirty job', doesn't it?

Good luck

Dan

Re: Shell Script to EXE ???

Paul Murray — Thu, 01 Feb 2001 16:39:31 GMT

Dan,

I have only one problem ..... I have never written a C program in my life !

Is there any particular resource that you would suggest in order to "learn" how to write C for HP-UX ??

Many thanks in advance,
Paul.

Re: Shell Script to EXE ???

Dan Hetzel — Fri, 02 Feb 2001 07:44:00 GMT

Hi Paul,

Here is the kind of program you need. You see it's quite simple. Simply replace the "/usr/bin/ls /etc" with the command you want to run.

--CUT HERE
#include

main()
{
system("/usr/bin/ls /etc");
}
-\CUT

Put the text into a file ending in '.c' (my_prog.c for example) and type "make myprog".
The executable will be created.

There are many books on the C language available on the market. I couldn't recommend any because I'm still happy with "The C programming Language - from K&Richie" that I've discovered 20 years ago ;-)
It's still a good reference.

All the best,

Dan

Re: Shell Script to EXE ???

Tommy Palo — Fri, 02 Feb 2001 08:57:38 GMT

Take a look at:
http://gatekeep.cs.utah.edu/hppd/hpux/Shells/shc-2.4a/

Re: Shell Script to EXE ???

Edward Sedgemore — Fri, 02 Feb 2001 10:46:43 GMT

You can indeed get compilers for shell scripts which should make them impossible to read. They advertise all the time in SysAdmin Magazine (www.sysadminmag.com)