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annotate python/gpg_add.py @ 895:8d3df8c0c730

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author Jeff Hammel <k0scist@gmail.com>
date Fri, 13 Aug 2021 15:16:21 -0700
parents a3ee050ae568
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1 #!/usr/bin/env python
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2
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3 """
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4 add a line to a gpg file; requires `gpg` on your path
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5 """
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6
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7 # Reference:
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8 # - https://www.gnupg.org/gph/en/manual/x110.html
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9 # - https://www.gnupg.org/gph/en/manual/x56.html
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10 # - http://tuxlabs.com/?p=450
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11
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12 import argparse
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13 import os
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14 import shutil
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15 import subprocess
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16 import sys
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17 import tempfile
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20 def main(args=sys.argv[1:]):
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21 """CLI"""
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22
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23 parser = argparse.ArgumentParser(description=__doc__)
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24 parser.add_argument('file', help="path to GPG file")
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25 parser.add_argument('line', help='line to add + encrypt')
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26 options = parser.parse_args(args)
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27
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28 if not os.path.isfile(options.file):
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29 parser.error("Not a file: '{}'".format(options.file))
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30
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31 tmpdir = tempfile.mkdtemp()
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32 try:
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33 # decrypt the file
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34 outfile = os.path.join(tmpdir, options.file + '.decrypted')
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35 subprocess.check_call(['gpg', '--output', outfile, '--decrypt', options.file])
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36 assert os.path.exists(outfile)
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37
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38 # read lines
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39 with open(outfile) as f:
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40 lines = f.read().strip().splitlines()
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41
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42 # write the file
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43 lines.append(options.line)
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44 with open(outfile, 'w') as f:
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45 f.write('\n'.join(lines))
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46
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47 # encrypt
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48 subprocess.check_call(['gpg', '--output', options.file, '--symmetric', outfile])
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49 finally:
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50 shutil.rmtree(tmpdir, ignore_errors=True)
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51
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52 if __name__ == '__main__':
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53 main()