Bruteforce GPG passphrase using script [duplicate]

Maybe something like:

#!/bin/bash## try all word in words.txtfor word in $(cat words.txt); do   # try to decrypt with word  echo "${word}" | gpg --passphrase-fd 0 --no-tty --decrypt somegpgfile.gpg --output somegpgfile;  # if decrypt is successfull; stop  if [ $? -eq 0 ]; then    echo "GPG passphrase is: ${word}";    exit 0;  fidone;exit 1;

1) The script won't be simple, at least how you envisage "simple."

2) It will take a long time - that's the point of using pass phrases over simple passwords. Taking the time to write such a script, incorporating your words which may or may not be in the phrase plus a stab at iterating will probably take over ten days.

3) You probably will forget the next passphrase too.

4) Ooops!

Sorry dude, time to start a new project (at least to while away the next ten days - I suggest a passphrase cracker as an ideal distraction.)

Merry Christmas!

-Oisin

Tersmitten's answer may be out of date.

echo "${word}" | gpg --passphrase-fd 0 -q --batch --allow-multiple-messages --no-tty  --output the_decrypted_file -d /some/input/file.gpg;

I used the above line with gpg 2.0.20 and libcrypt 1.5.2 to achieve the desired results.