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Full Discussion: Make a password protected bash script resist/refuse “bash -x” when the password is given
Top Forums Shell Programming and Scripting Make a password protected bash script resist/refuse “bash -x” when the password is given Post 302878825 by frad on Monday 9th of December 2013 06:42:41 AM
Old 12-09-2013
Make a password protected bash script resist/refuse “bash -x” when the password is given
I want to give my long scripts to customer. The customer must not be able to read the scripts even if he has the password. The following command locks and unlocks the script but the set +x is simply ignored.

The code:

Code:
read -p 'Script: ' S && C=$S.crypt H='eval "$((dd if=$0 bs=1 skip=//|gpg -d)2>/dev/null)"; exit;' && gpg -c<$S|cat >$C <(echo $H|sed s://:$(echo "$H"|wc -c):) - <(chmod +x $C)

I want to give to customer a script that he can run by entering a password. The customer must not be able to see the code via cat/vim/bash -x. To counter the "bash -x" we can use set +x in the beginning of the script but it does not work for the password protected script. we run bash -x script.secure, put the password and we see the commands even if the script starts with set +x
 

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LEARN ABOUT OPENSOLARIS

gpg-error-config

gpg-error-config(1)						   User Commands					       gpg-error-config(1)

NAME

       gpg-error-config - helper script for building with libgpg-error

SYNOPSIS

       gpg-error-config [--version] [--prefix=dir] [--cflags] [--libs] [--exec-prefix=dir]

DESCRIPTION

       The  gpg-error-config tool is used to determine the compiler and linker flags that should be used to compile and link programs that use the
       libgpg-error library.

OPTIONS

       The following options are supported:

       --cflags 	       Print the compiler flags that are necessary to compile a program using the specified library.

       --exec-prefix=dir       If specified, use dir instead of the exec installation prefix that the library was built with, when  computing  the
			       output for the --cflags and --libs options. This option must be specified before any --libs or --cflags options.

       --libs		       Print the linker flags that are necessary to link with the specified library.

       --prefix=dir	       If specified, use dir instead of the installation prefix that the library was built with, when computing the output
			       for the --cflags and --libs options.  This option must be specified before any --libs  or  --cflags  options.  This
			       option is also used for the exec prefix if the --exec-prefix option is not specified.

       --version	       Print the currently installed version of the library on the standard output.

EXAMPLES

       Example 1: Getting the libgpg-error library version

       example% gpg-error-config --version

       Example 2: Determining the libraries required to link with the libgpg-error library

       example% gpg-error-config --libs

EXIT STATUS

       The following exit values are returned:

       0	Application exited successfully

       >0	Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/gpg-error-config       Executable for libgpg-error helper script

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgpg-error		   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Volatile			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       gpg-error(1), libgpg-error(3), pkg-config(1), attributes(5)

       Written by Jeff Cai, Sun Microsystems Inc., 2008.

SunOS 5.11							    10 Jan 2008 					       gpg-error-config(1)
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