Shc (shell script compiler)
SHC is a shell script compiler written in C programming language. The Shell Script Compiler (SHC) convertslinux shell scripts directly into executable binaries. Compiling shell scripts into binaries provides protection against accidental changes, source modification and renders a way of hinding source code written in linux shell scripting language.[1]
Mechanism
SHC takes a shell script which is specified on the command line by option and produces a C source code of the script. The generated source code is then compiled and linked to produce a binary executable. Thus it's a two step process where, at first step, it creates a file of the shell script file . Then it is compiled with and thus build the binary from a C source code with the default C compiler available in any system.[1]
![{\displaystyle [-ffilename]}](/media/api/rest_v1/media/math/render/svg/52d4414af60249f2795401dde19e243c072c2a3e)
Versions
| Version | Release Date | Changes |
|---|---|---|
| shc-3.9.2 | 21-Aug2015 | Added Busybox support |
| shc-3.9.1 | 03-Apr-2015 | Set -T option as default, and renaming it to -U to its counter logic |
| shc-3.9.0 | 01-Apr-2015 | Adding output file option with [-o filename] and bug fixes |
| shc-3.8.9 | 04-Dec-2013 | Fixing a long-standing bug making the source not hidden |
| shc-3.8.7 | 10-Feb-2010 | Bug on 64bit systems with expiration dates |
| shc-3.8.5 | 10-Feb-2010 | |
| shc-3.8.3 | 10-Jul-2006 | Fixed untraceable() problems on FreeBSD |
| shc-3.8.2 | 06-Jul-2006 | Read permission of the script.x exposes it to disassembling.
Group and others read permission is now removed by default. |
| shc-3.7 | 28-Jun-2005 | Removed all strings in the compiled script. Improved program output and error messages.
The -m option allows to define the *complete* expiration message. Updated manpage shc.1 |
| shc-3.6 | 16-Jun-2005 | Two new options:
-D switch on Debug exec calls. -T switch off unTraceable. |
| shc-3.4 | 19-Jun-2003 | Remove "bad alignment" problem on AIX and other systems.
Where exists, use /proc/<pid>/as in untraceable. |
| shc-3.3 | 21-Apr-2003 | Prevent to ptrace the process |
| shc-3.2 | 05-Aug-2002 | Find ancient pclose that must be fclose |
| shc-3.1 | 05-Aug-2002 | Fixed a misbehavior on scripts with a in-frist-line option equal to "end of options"
(i.e. #!/bin/sh -- ) GCC "warning: return type of `main' is not `int'" removed |
| shc-2.4 | 05-Aug-2002 |
Alternatives
External links
- https://raw.githubusercontent.com/neurobin/shc/release/README.md
- http://www.l0d.org/Decrypt_an_shc_crypted_file-4.html
- http://neurobin.github.io/shc