1 | #!/usr/bin/env python3 |
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2 | |
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3 | # Requires Python 3+ |
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4 | |
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5 | ''' |
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6 | Simple decoder script; useful in shell scripts |
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7 | |
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8 | Copyright (C) 2011-2012 Virtual Security Research, LLC |
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9 | Author: Timothy D. Morgan |
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10 | |
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11 | This program is free software: you can redistribute it and/or modify |
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12 | it under the terms of the GNU Lesser General Public License, version 3, |
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13 | as published by the Free Software Foundation. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, |
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16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 | GNU General Public License for more details. |
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19 | |
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20 | You should have received a copy of the GNU General Public License |
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21 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
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22 | ''' |
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23 | |
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24 | |
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25 | import sys |
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26 | import argparse |
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27 | from bletchley import blobtools |
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28 | |
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29 | |
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30 | parser = argparse.ArgumentParser( |
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31 | description='A simple encoder script that is useful in shell scripts.' |
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32 | ' For more information, see: http://code.google.com/p/bletchley/wiki/Overview') |
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33 | parser.add_argument( |
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34 | 'input_file', nargs='?', default=None, |
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35 | help='File containing encrypted blobs to analyze, one per line. ' |
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36 | 'Omit to read from stdin.') |
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37 | parser.add_argument( |
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38 | '-e', dest='encoding_chain', type=str, required=True, |
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39 | help='Comma-separated sequence of encoding formats used to encode the' |
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40 | ' token, starting with the last encoding to apply.' |
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41 | ' (Use "?" for a listing of supported encodings.)') |
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42 | options = parser.parse_args() |
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43 | |
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44 | if options.encoding_chain == '?': |
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45 | print('\n\t'.join(['Supported encodings:']+blobtools.supportedEncodings())) |
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46 | sys.exit(0) |
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47 | |
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48 | input_file = sys.stdin.buffer |
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49 | if options.input_file is not None: |
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50 | input_file = open(options.input_file, 'rb') |
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51 | |
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52 | blob = input_file.read() |
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53 | |
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54 | specified_encodings = options.encoding_chain.split(',') |
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55 | specified_encodings.reverse() |
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56 | # XXX: report invalid encodings |
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57 | sys.stdout.buffer.write(blobtools.encodeChain(specified_encodings, blob)) |
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58 | sys.stdout.buffer.write(b'\n') |
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