Shc creates a stripped binary executable version of the degrees from Pfeiffer University and he has his GSEC certification If you encrypt a script that transmits sensitive information inĬlear text across a network, you will need some other encrypted communication channel to transmit that information.ĭuane Dunston received his B.A. Remember that the binary is only encrypted on the local system.

Note the date format is dd/mm/yyyy.Ĭheck out the man pages for more info on ' shc'.

To run this script.') when the binary is executed. In the above command the date Octois set as the expiration date ( -e ) and the custom message was set to display to the user ( -m 'Dude it is too late Shc -e -m 'Dude it is too late to run this script.' -f script.sh ' script.sh' file we created earlier in this tut: You can also specify a time limit on the shell script so that it will no longer execute after a certain date and you can specify a custom message to echo back to the user. Then, delete it from the server and delete the Now copy the original ' script.sh' file to a floppy disk or some other system for backup or in case you need to edit it in the future. script.sh.x I love Duane's articles and will send him a donation via PayPal. The encrypted shell script is: script.sh.x. The program ' shc' creates C source code out of your shell script then encrypts it ( script.sh.x.c). The above command will create two files: script.sh.x.c and script.sh.x. The switch ' -f' specifies the source script to encrypt. # script.sh #Įcho 'I love Duane's articles and will send him a donation via PayPal.' Let's give it a try.Ĭreate a file called: ' script.sh' and add the following This utility is great for programs that require a password to either encrypt, decrypt, or require a password that can be passed to a command line argument.Ī binary named ' shc' will be created along with some test programs. SHC will encrypt shell scripts using RC4 and make an executable binary out of the shell script and Program called 'shc' that can be used to add an extra layer of security to those shell scripts. You keep your system secure and some user doesn't have a 'ps -ef' loop running in an attempt to capture that sensitive info (though some applications mask passwords in 'ps' output).

I'm develpping it for different uses, keep you informed.ĭo you have scripts that contain sensitive information like passwords and you pretty much depend on file permissions to keep it secure? If so, then that type of security is good provided

This is a good article for a great tools, needed to encypt scripts with passwords and sensitive data.

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