mirror of https://github.com/dirtbags/moth.git
60 lines
1.4 KiB
Python
Executable File
60 lines
1.4 KiB
Python
Executable File
#! /usr/bin/python
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## Fetch some public domain images, make a PNG of the key, and encode
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## that in the Exif.Image.OriginalRawFileData tags of the images
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import os
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import glob
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import random
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import shutil
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import md5
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import sys
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import zipfile
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def system(cmd):
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ret = os.system(cmd)
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if ret:
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raise OSError('return value %d: %s' % (ret, cmd))
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# Read in key image
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key_png = sys.stdin.read()
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# Duplicate two photos, give them a chance to bindiff
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jpegs = sys.argv[1:]
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random.shuffle(jpegs)
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for fn in jpegs[:2]:
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root, ext = os.path.splitext(fn)
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jpegs.append(fn)
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random.shuffle(jpegs)
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bytes_per_photo = len(key_png) / len(jpegs)
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zipf = zipfile.ZipFile(sys.stdout, 'w')
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for i in range(len(jpegs)):
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fn = jpegs[i]
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cmd1 = 'set Exif.Canon.0x0019 %d' % i
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offset = i * bytes_per_photo
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if i == len(jpegs) - 1:
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bytes = key_png[offset:]
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else:
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bytes = key_png[offset:offset + bytes_per_photo]
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bytes_str = ' '.join(str(ord(c)) for c in bytes)
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cmd2 = 'set Exif.Canon.0x0018 "%s"' % bytes_str
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# Now apply our devious stuff
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system('exiv2 -M\'%s\' -M\'%s\' %s' % (cmd1, cmd2, fn))
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# Read it in
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contents = open(fn, 'rb').read()
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# Find the new file's md5 checksum
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checksum = md5.new(contents).hexdigest()
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# Make a new zip file entry
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zi = zipfile.ZipInfo(checksum + '.jpg')
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zi.compress_type = zipfile.ZIP_DEFLATED
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zi.external_attr = 0644 << 16L
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zipf.writestr(zi, contents)
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