mirror of
https://github.com/sunknudsen/privacy-guides.git
synced 2025-02-23 01:03:59 +00:00
70 lines
1.9 KiB
Bash
70 lines
1.9 KiB
Bash
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#! /bin/bash
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set -e
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bold=$(tput bold)
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red=$(tput setaf 1)
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normal=$(tput sgr0)
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dev="/dev/sda1"
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tmp="/home/pi/tmp"
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usb="/home/pi/usb"
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waitForUsb () {
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if [ ! -e $dev ]; then
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printf "Insert USB thumb drive and press enter"
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read -r confirmation
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waitForUsb
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fi
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}
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waitForUsb
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sudo mkdir -p $tmp
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if ! mount | grep $tmp > /dev/null; then
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sudo mount -t tmpfs -o size=100m tmp $tmp
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fi
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sudo mkdir -p $usb
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if ! mount | grep $usb > /dev/null; then
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sudo mount $dev $usb -o uid=pi,gid=pi
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fi
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if [ -z $secret ]; then
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printf "%s\n" "Type secret and press enter"
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read -r secret
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fi
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encrypted_secret=$(echo -n "$secret" | gpg --s2k-mode 3 --s2k-count 65011712 --s2k-digest-algo sha512 --cipher-algo AES256 --symmetric --armor)
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gpg-connect-agent reloadagent /bye > /dev/null 2>&1
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encrypted_secret_hash=$(echo -n "$encrypted_secret" | openssl dgst -sha512 | sed 's/^.* //')
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encrypted_secret_short_hash=$(echo -n "$encrypted_secret_hash" | head -c 8)
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printf "%s\n" "$encrypted_secret"
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printf "SHA512 hash: $bold%s$normal\n" "$encrypted_secret_hash"
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printf "SHA512 short hash: $bold%s$normal\n" "$encrypted_secret_short_hash"
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echo -n "$encrypted_secret" | qr --error-correction=H > "$tmp/secret.png"
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font_size=$(echo "$(convert "$tmp/secret.png" -format "%h" info:) / 8" | bc)
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text_offset=$(echo "$font_size * 1.5" | bc)
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convert "$tmp/secret.png" -gravity center -scale 200% -extent 125% -scale 125% -gravity south -font /usr/share/fonts/truetype/noto/NotoMono-Regular.ttf -pointsize $font_size -fill black -draw "text 0,$text_offset '$encrypted_secret_short_hash'" "$usb/$encrypted_secret_short_hash.jpg"
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printf "%s\n" "Show SHA512 hash as QR code? (y or n)? "
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read -r answer
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if [ "$answer" = "y" ]; then
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printf "%s\n" "Press q to quit"
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sleep 1
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echo -n "$encrypted_secret_hash" | qr --error-correction=L > "$tmp/secret-hash.png"
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sudo fim --autozoom --quiet --vt 1 "$tmp/secret-hash.png"
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fi
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sudo umount $tmp
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sudo umount $usb
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printf "%s\n" "Done"
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