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Encrypt and password-protect execution of any bash script, Version 2

Terminal - Encrypt and password-protect execution of any bash script, Version 2
read -p 'Script: ' S && C=$S.crypt H='eval "$((dd if=$0 bs=1 skip=//|gpg -d)2>/dev/null)"; exit;' && gpg -c<$S|cat >$C <(echo $H|sed s://:$(echo "$H"|wc -c):) - <(chmod +x $C)
2013-03-10 08:59:45
User: rodolfoap
Functions: cat chmod echo gpg read sed wc
5
Up
Down
Encrypt and password-protect execution of any bash script, Version 2

(Please see sample output for usage)

Use any script name (the read command gets it) and it will be encrypted with the extension .crypt, i.e.:

myscript --> myscript.crypt

You can execute myscript.crypt only if you know the password. If you die, your script dies with you.

If you modify the startup line, be careful with the offset calculation of the crypted block (the XX string).

Not difficult to make script editable (an offset-dd piped to a gpg -d piped to a vim - piped to a gpg -c directed to script.new ), but not enough space to do it on a one liner.

Sorry for the chmod on parentheses, I dont like "-" at the end.

Thanks flatcap for the subshell abbreviation to /dev/null

Show sample output | Add to favourites | Report as malicious

Alternatives

There are 9 alternatives - vote for the best!

Terminal - Alternatives
echo "eval \"\$(dd if=\$0 bs=1 skip=XX 2>/dev/null|gpg -d 2>/dev/null)\"; exit" > script.secure; sed -i s:XX:$(stat -c%s script.secure): script.secure; gpg -c < script.bash >> script.secure; chmod +x script.secure
2013-03-09 11:16:48
User: rodolfoap
Functions: chmod echo gpg sed stat
Tags: Security GPG Encryption secure crypt
6
Up
Down
Encrypt and password-protect execution of any bash script

(Please see sample output for usage)

script.bash is your script, which will be crypted to script.secure

script.bash --> script.secure

You can execute script.secure only if you know the password. If you die, your script dies with you.

If you modify the startup line, be careful with the offset calculation of the crypted block (the XX string).

Not difficult to make script editable (an offset-dd piped to a gpg -d piped to a vim - piped to a gpg -c directed to script.new ), but not enough space to do it on a one liner.

Show sample output | Comments (5) | Add to favourites | Report as malicious

Know a better way?

If you can do better, submit your command here.

What others think

How fun! But you can make it shorter by using a subshell.

Change:

X 2>/dev/null; Y 2>/dev/null

into

(X;Y)2>/dev/null

This saves 12 bytes!

read -p 'Script: ' S && C=$S.crypt H='eval "$((dd if=$0 bs=1 skip=//|gpg -d)2>/dev/null)";exit;' && gpg -c<$S|cat >$C <(echo $H|sed s://:$(echo "$H"|wc -c):) - <(chmod +x $C)
Comment by flatcap 10 weeks and 5 days ago

Hey that abbreviation is nice! Thanks flatcap!

Comment by rodolfoap 10 weeks and 4 days ago

When you run

[code]

bash -x test.crypt

[/code]

you still able to see lot stuff...

Comment by dynaguy 10 weeks and 3 days ago

Welcome to my Taobao shop !

Daily update:

Discover amazing stuff, collect the things you love, buy it all in one place.

novel style, varieties, low price and good quality, and the low sale price

==== ( http://www.fullmalls.com ) =====

==== ( http://www.fullmalls.com ) =====

New to Hong Kong : Winter Dress

Best quality, Best reputation , Best services

---**** NHL Jersey Woman $ 40 ---**** NFL Jersey $ 35

---**** NBA Jersey $ 34 ---**** MLB Jersey $ 35

---**** Jordan Six Ring_m $ 36 ---**** Air Yeezy_m $ 45

---**** T-Shirt_m $ 25 ---**** Jacket_m $ 36

---**** Hoody_m $ 50 ---**** Manicure Set $ 20

---**** handbag $ 37 ---**** ugg boot $ 43 ---****

give you the unexpected harvest

==== ( http://www.fullmalls.com ) =====

==== ( http://www.fullmalls.com ) =====

==== ( http://www.fullmalls.com ) =====

==== ( http://www.fullmalls.com ) =====

Comment by yewriusdf 10 weeks and 3 days ago

Dynaguy: of course, if you have the password, you see everything. It's the idea. Without password, you can't see nothing. It's the idea.

Comment by rodolfoap 10 weeks and 3 days ago

Your point of view

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