A generic shell script compiler. Shc takes a script, which is specified on the command line and produces C source code. The generated source code is then compiled and linked to produce a stripped binary executable.
The compiled binary will still be dependent on the shell specified in the first line of the shell code (i.e shebang) (i.e. #!/bin/sh), thus shc does not create com‐ pletely independent binaries.
shc itself is not a compiler such as cc, it rather encodes and encrypts a shell script and generates C source code with the added expiration capability. It then uses the system compiler to compile a stripped binary which behaves exactly like the original script. Upon execution, the compiled binary will decrypt and execute the code with the shell -c option.
#Install:
- ./configure
- make
- sudo make install
Note: If make fails due to automake version, run ./autogen.sh before running the above commands.
##On Ubuntu:
sudo add-apt-repository ppa:neurobin/ppa
sudo apt-get update
sudo apt-get install shc
If the above installation method seems like too much work, then just copy the compiled binary from bin/x32 or bin/x64 to /usr/bin and put the shc.1 file in /usr/share/man/man1.
#Usage:
shc [options]
shc -f script.sh -o binary
shc -U -f script.sh -o binary # Untraceable binary (prevent strace, ptrace etc..)
#Testing:
cdtotestdirectory:cd test- Try:
shc -f test.bash -o test, where test.bash is the bash source. - output binary file will be test. If no output file is specified
by the
-ooption, then it will create an executable with.xextension by default.
#Known bugs:
The one (and I hope the only) limitation using shc is the _SC_ARG_MAX system configuration parameter.
It limits the maximum length of the arguments to the exec function, limiting the maximum length of the runnable script of shc.
!! - CHECK YOUR RESULTS CAREFULLY BEFORE USING - !!