validate3ofM.sh

#!/bin/bash

IFS=$'\n'

case "$1" in
  *.pdf|*.png|*.jpg)
    FILE=($(zbarimg -q --raw -Sdisable -Sqrcode.enable $1))
    lines=$(zbarimg --raw -Sdisable -Sqrcode.enable $1 | wc -l)
    ;;
  "")
    echo "You need to put a filename as the first argument.

If it's a pdf, png or jpg image it will be scanned for barcodes. If it's anything else then it will be scanned for secrets, one per line. If you have a webcam you can scan your barcodes using this command
  zbarcam -q --raw -Sdisable -Sqrcode.enable >> qrcodes
and then validate them by running
  sudo ./validate3ofM qrcodes"
    ;;
  *)
    FILE=($(sed --quiet --regexp-extended '/^[0-9]+-[0-9a-f]*$/p' "$1" | sort -u))
    lines=$(sed --quiet --regexp-extended '/^[0-9]+-[0-9a-f]*$/p' "$1" | sort -u | wc -l)
    ;;
esac

list=$(seq 1 $lines)
for c1 in $list; do
    for c2 in $list; do
        if [[ $c2 != $c1 && $c1 -lt $c2 ]]; then
            for c3 in $list; do
                if [[ $c3 != $c2 && $c3 != $c1 && $c2 -lt $c3 && $c1 -lt $c2 ]]; then
                    printf "$c1-$c2-$c3: "
                    printf "${FILE[$c1-1]}\n${FILE[$c2-1]}\n${FILE[$c3-1]}\n" | ssss-combine -q -t 3
                    if [[ $? -ne 0 ]]; then
                        printf "${FILE[$c1-1]}\n${FILE[$c2-1]}\n${FILE[$c3-1]}\n"
                    fi
                fi
            done
        fi
    done
done