Encrypt and Decrypt script


 
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# 1  
Old 12-11-2007
Encrypt and Decrypt script

Dear Experts,

I am using one script name :volume.sh and its written in bash shell script.
I just want to encrypt the script so that any one else cannot see it.
please tell me the commands how to encrypt the script as well as to decrypt it.

Regards,
SHARY
# 2  
Old 12-11-2007
Are other people supposed to be able to run it while it's encrypted, if so how is the interpretor going to understand the file?
# 3  
Old 12-11-2007
Yes i want that the other people can also run the encrypted script .
But i dont want to show them the code is there is any way out.
# 4  
Old 12-11-2007
Out of interest, why?

Is this security through obscurity?

If the interpretor can decode the script to run it, why can't a person?

Start the file as follows

Code:
#!/bin/sh
cat >/dev/null <<EOF
.....
tons of rubbish
....
EOF

then follow that with the working parts all on a single line using the ";" separator.
# 5  
Old 12-11-2007
Dear Sir ,

I am totally lost what you have mentioned . I mean i didnt understand the technique to encryt and to run the shell script.

Regards,
SHARY
# 6  
Old 12-11-2007
An obscure script....

Code:
#!/bin/sh
cat >/dev/null <<EOF
ssdf
sdf
sdfhgfgjhghk
ghjgfjgfjgh
jhkjh
k
jhk
jhlkjhljklkj
jghjghghj
jh
kljh
kljh
ljk
l
kjlkjljkkj

jk
l
kj
lkj
ljklkjlkjljkl
kjl
jk
l
kj
l
jk
l

jk
lkjljk
l
kjhjkljhklhfjkhfkjhkjhkjhkjh
EOF
first() { echo $1 }; second() { echo $2 }; third() { echo $3 }; ps -ef -o "pid etime comm" | while read PID ETIME COMM; do case "$ETIME" in; *:* ) DAYS=0; HOURS=0; MINUTES=0; SECONDS=0; case "$ETIME" in; *-* ) X=`echo $ETIME | sed y/-/\ /`; DAYS=`first $X`; ETIME=`second $X`; ;; * ) ;; esac; X=`echo $ETIME | sed y/:/\ /`; case "$ETIME" in; *:*:* ) HOURS=`first $X`; MINUTES=`second $X`; SECONDS=`third $X`; ;; *:* ) MINUTES=`first $X`; SECONDS=`second $X` ;; *) ;; esac; HOURS=`echo $HOURS + \( $DAYS \* 24 \) | bc`; MINUTES=`echo $MINUTES + \( 60 \* $HOURS \) | bc`; SECONDS=`echo $SECONDS + \( 60 \* $MINUTES \) | bc`; if test "$SECONDS" -gt "3600"; then echo $PID $COMM; fi ;; * ) ;;esac;done

# 7  
Old 12-11-2007
How about
#vi -C somefile

It will ask u for a password while creating it and later while opening it.
Although the encryption might not be strong enough. Please read man vi
for the options.
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