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#!/usr/bin/env python3 | |
# W.J. van der Laan 2017, distributed under MIT license | |
# James Hilliard 2017 | |
import binascii | |
import base64 | |
import struct | |
import json | |
import os, sys | |
import hashlib | |
from Crypto import Random | |
from Crypto.Cipher import AES | |
KEY = binascii.a2b_hex(b'fffffbffeffffbfffbbfffbfdbfff7ffffffffffffffdfffff7fffffbfffffff') | |
def unpad(s): | |
'''PKCS7 unpad.''' | |
padlen = s[len(s)-1] | |
if padlen > 16: | |
raise ValueError('Invalid padding') | |
return s[:-padlen] | |
def decrypt(data_in): | |
# first 32 bytes are IV, we only need 16 of that | |
iv = data_in[0:16] | |
cipher = AES.new(KEY, AES.MODE_CBC, iv) | |
data_out = cipher.decrypt(data_in[32:]) | |
data_out = unpad(data_out) | |
crc = data_out[0:4] | |
ccrc = struct.pack('I',binascii.crc32(data_out[4:])) | |
assert(crc == ccrc) | |
json_data = json.loads(data_out[4:].decode()) | |
return json_data | |
def main(): | |
if len(sys.argv) < 2: | |
print('Usage: %s /path/to/configfile.bin' % os.path.basename(sys.argv[0])) | |
exit(1) | |
with open(sys.argv[1], 'rb') as f: | |
data_in = base64.b64decode(f.read()) | |
# decode second layer, create one huge JSON file with record types at top level | |
json_data = decrypt(data_in) | |
out_recs = {} | |
for record in json_data: | |
d = base64.b64decode(record['data']) | |
assert(record['type'] not in out_recs) # duplicate | |
out_recs[record['type']] = decrypt(d) | |
if len(sys.argv) == 3: | |
with open(sys.argv[2], 'w') as outfile: | |
json.dump(out_recs, outfile, indent=4, separators=(',', ': ')) | |
else: | |
json.dump(out_recs, sys.stdout, indent=4, separators=(',', ': ')) | |
if __name__ == '__main__': | |
main() |
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