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#!../expect --

# Name: cryptdir

# Author: Don Libes, NIST

#

# Synopsis:

#         cryptdir [dir]

#       decryptdir [dir]

#

# Encrypt or decrypts the current directory or named directory if given.

if {[llength $argv] > 0} {

        cd $argv

}

# encrypt or decrypt?

set decrypt [regexp "decrypt" $argv0]

set timeout -1

stty -echo

send "Password:"

expect -re "(.*)\n"

send "\n"

set passwd $expect_out(1,string)

# wouldn't want to encrypt files with mistyped password!

if !$decrypt {

        send "Again:"

        expect -re "(.*)\n"

        send "\n"

        if ![string match $passwd $expect_out(1,string)] {

                send_user "mistyped password?"

                stty echo

                exit

        }

}

stty echo

log_user 0

foreach f [glob *] {

        # strip shell metachars from filename to avoid problems

        if [regsub -all {[]['`~<>:-]} $f "" newf] {

                exec mv $f $newf

                set f $newf

        }

        set strcmp [string compare .crypt [file extension $f]]

        if $decrypt {

                # skip files that don't end with ".crypt"

                if 0!=$strcmp continue

                spawn sh -c "exec crypt < $f > [file root $f]"

        } else {

                # skip files that already end with ".crypt"

                if 0==$strcmp continue

                spawn sh -c "exec crypt < $f > $f.crypt"

        }

        expect "key:"

        send "$passwd\r"

        expect

        wait

        exec rm -f $f

        send_tty "."

}

send_tty "\n"