In /usr/bin/crypt line 20:
 mcrypt -a enigma -o scrypt -m stream --bare --key $1 --force
                                                   ^-- SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
 mcrypt -a enigma -o scrypt -m stream --bare --key "$1" --force

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...