Compiling Shell Scripts to Executable Binaries with SHC

Mon, 12 Oct 2020 00:00:00 +0000

Introduction

Official repository address: https://github.com/neurobin/shc

A generic shell script compiler. Shc takes a script specified in the command line and generates C source code. The generated source code is then compiled and linked to produce a stripped binary executable file.

The compiled binary still depends on the shell specified in the shebang line (i.e., #!/bin/sh) of the original shell script. Therefore, shc does not create fully independent binaries.

Shc itself is not a compiler like cc, but rather encodes and encrypts shell scripts while generating C source code with additional expiration functionality. It then uses the system compiler to build a stripped binary that behaves exactly like the original script. When executed, the compiled binary decrypts and runs the code using the shell -c option.

Installation

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yum install epel-release
yum -y install gcc gcc-c++ libstdc++-devel
yum -y install shc

[root@template mnt]# shc -v
shc parse(-f): No source file specified

shc Usage: shc [-e date] [-m addr] [-i iopt] [-x cmnd] [-l lopt] [-o outfile] [-rvDSUHCABh] -f script

Testing

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shc -v -rf HelloWorld.sh
./HelloWorld.x

Binary Compilation on Kang's Blog

Compiling Shell Scripts to Executable Binaries with SHC

Introduction

Installation

Testing