Producing printable QR codes for persistent storage of GPG private keys

gpg2qrcodes.sh

#!/bin/bash

#1. export gpg private key as ascii
#2. split ascii into 4 qr code images
#3. generate bash script for importing bash images
#4. generate bash script for decrypting files.

gpg --export-secret-key --armor | split -C 1000 - IMG
for f in IMG*; do cat $f | qrencode -o $f.png; rm -vf $f; done

# Importing the QR codes:
# Note that, when making scans or photographs, you do not produce large images.
# If zbar does not recognise your QR code, try downscaling the image.
cat <<EOF >importmykey.sh
#!/bin/bash
touch mykey.asc
for f in IMG*.png; do zbarimg --raw \$f | head -c -1 ; done | gpg --pinentry-mode loopback --import
EOF

cat <<EOF >decryptmyfiles.sh
#!/bin/bash
gpg --pinentry-mode loopback --decrypt-files *.gpg
EOF

cat <<EOF >encryptmyfiles.sh
#!/bin/bash
gpg --pinentry-mode loopback --encrypt-files \$@
EOF

chmod +x importmykey.sh decryptmyfiles.sh encryptmyfiles.sh