Shell Scripts Encryption

For Developers
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Dear,
Developers, I need help for OpenWRT Shell Scripts Encryption, I am trying to encrypt shell scripts using shc, after I make, its work in all Linux system but when I try in OpenWRT I am getting an error, if anyone has an idea about it please help me. T.I.A

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Posting your error would be a good idea.

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files.sh.x: line 1: syntax error: unexpected "("

this is the error I am getting when I try to run ./files.sh.x & also I try to run sh files.sh.x

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May I know if the encrypted shell script runs on BusyBox or not? As in https://neurobin.org/projects/softwares/unix/shc/man.html, there's an option to compile the script for BusyBox.

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Hello rtau Thanks for your replay, no encrypted shell script not running on BusyBox, but raw shell scripts running on BusyBox & also without. before I was used before I encoded by this command

shc -v -r -T -f file.sh and after you said I have downloaded a new version of shc & then I try with this commands shc -U -B -v -f file -o file2 and shc -Bf file -o file2

but by both error report is the same ./file2: line 1: syntax error: unexpected "("
hope you can help me. T.I.A

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Silly question, what is the usecase for encrypted shell scripts on a router where everybody that can log in has root? Especially given https://github.com/yanncam/UnSHc? Just curious...

Best Regards

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From shc manpage, it seems to use C compiler to compile part of the script to machine code, which is, at least, CPU architecture specific. May I know if you have used the compiler for the target, say for MIPS, when invoking shc?

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No I haven't used, sir is there any other way to encrypt shell scripts? if you can please help me, thanks...

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What are you trying to achieve?

I've found it hard to think of an application for "encrypting" a shell script, as it would seem, by definition, that either

  • It is being run by a privileged user that can automatically decrypt it, so any privileged user would be able to decrypt it without significant effort
  • It is being run interactively, so that any "sensitive" content could be entered by the user at that time

_Edit: See for some context and further information https://blog.dbi-services.com/encryption-of-shell-scripts/_

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i'm solved build SHC in openwrt 19.07.4

SUCCESS
CFLAGS="-fPIC -pthread -mabi=32 -Wa,--noexecstack -Wall -O3 -Os -pipe -mno-branch-likely -mips32r2
-mtune=24kc -fno-caller-saves -fno-plt -fhonour-copts -Wno-error=unused-but-set-variable
-Wno-error=unused-result -msoft-float"

ERROR
CC="mips-openwrt-linux-musl-gcc"
CFLAGS="-Os -pipe -mno-branch-likely -mips32r2 -mtune=24kc -fno-caller-saves -fno-plt -fhonour-copts
-Wno-error=unused-but-set-variable -Wno-error=unused-result -msoft-float -mips16 -minterlink-mips16"

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