75 lines
1.9 KiB
Bash
75 lines
1.9 KiB
Bash
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#!/bin/bash
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#####
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#
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# Author: Kevin Douglas <douglk@gmail.com>
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#
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# Simple command line script to restore ascii armor gpg keys from a QR image.
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# You can use the following commands to import your restored keys:
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#
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# gpg --import pgp-public-keys.asc
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# gpg --import pgp-private-keys.asc
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#
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# This script will allow you to convert QR images created with asc2qr.sh
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# info an ascii armor pgp key.
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#
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# This script depends on the following libraries/applications:
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#
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# libqrencode (http://fukuchi.org/works/qrencode/)
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# zbar (http://zbar.sourceforge.net)
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#
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# If you need to backup or restore binary keys, see this link to get started:
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#
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# https://gist.github.com/joostrijneveld/59ab61faa21910c8434c#file-gpg2qrcodes-sh
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#
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#####
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# Name of the output key after decoding
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output_key_name="mykey.asc"
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# Argument/usage check
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if [ $# -lt 1 ]; then
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echo "usage: `basename ${0}` <QR image 1> [QR image 2] [...]"
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exit 1
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fi
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# Create a temp file to use as a pattern for splitting the input key file.
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# This helps protect against file collisions in the current directory.
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export TMPDIR=""
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tmp_file=$(mktemp keyparts.XXXXXX)
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if [ $? -ne 0 ]; then
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echo "failed to create temporary file"
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exit 1
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fi
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# For each image on the command line, decode it into text
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index=1
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for img in "$@"; do
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if [ ! -f ${img} ]; then
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echo "image file not found: ${img}"
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exit 1
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fi
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asc_key="${tmp_file}.${index}"
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echo "decoding ${img}"
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zbarimg --raw ${img} 2>/dev/null | perl -p -e 'chomp if eof' > ${asc_key}
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if [ $? -ne 0 ]; then
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echo "failed to decode QR image"
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exit 2
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fi
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index=$((index+1))
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done
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echo "creating ${output_key_name}"
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cat ${tmp_file}.* > ${output_key_name}
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# Find the correct secure deletion utility (srm on Mac, shred on Linux)
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sec_del="srm"
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which ${sec_del} 2>&1 1>/dev/null
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if [ $? -ne 0 ]; then
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sec_del="shred --remove"
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fi
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# Securely clean up temporary files
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${sec_del} ${tmp_file}
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${sec_del} ${tmp_file}.*
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