#!/opt/labtainer/venv/bin/python3 ''' This software was created by United States Government employees at The Center for Cybersecurity and Cyber Operations (C3O) at the Naval Postgraduate School NPS. Please note that within the United States, copyright protection is not available for any works created by United States Government employees, pursuant to Title 17 United States Code Section 105. This software is in the public domain and is not subject to copyright. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ''' import sys import os import shutil import tempfile ''' Look at _tar directories for the given labs/[lab]/[image] and create or update tar files to reflect recent changes. Uses an 'external-manifest' file to identify tars from other labs that should be part of this one. ''' external = 'external-manifest' tmp_loc = tempfile.TemporaryDirectory().name def expandManifest(full, tar_name): ''' extract files from a tar named in an external manifest file into a staging directory at tmp_loc ''' #print('expand for %s' % full) mf = os.path.join(full, external) labdir = os.path.dirname(os.path.dirname(os.path.dirname(full))) #print('labdir is %s' % labdir) with open(mf) as fh: for line in fh: lab, image = line.strip().split(':') ref_tar = os.path.join(labdir, lab, image, os.path.basename(full), tar_name) #print('external ref is %s' % ref_tar) cmd = 'tar xf %s -C %s' % (ref_tar, tmp_loc) os.system(cmd) def newest_referenced_tar(full, tar_name): ''' return a path to the most recent tar file named in an external manifest. ''' retval = None recent = 0 labdir = os.path.dirname(os.path.dirname(os.path.dirname(full))) mf = os.path.join(full, external) with open(mf) as fh: for line in fh: lab, image = line.strip().split(':') ref_tar = os.path.join(labdir, lab, image, os.path.basename(full), tar_name) if not os.path.isfile(ref_tar): print('Tar file named in manifest not found: %s component %s' % (ref_tar, full)) exit(1) tar_time = os.stat(ref_tar).st_mtime if tar_time > recent: retval = ref_tar recent = tar_time return retval def newest_file_in_tree(rootfolder): return max( (os.path.join(dirname, filename) for dirname, dirnames, filenames in os.walk(rootfolder) for filename in filenames), key=lambda fn: os.stat(fn).st_mtime) def copydir(source, dest): """Copy a directory structure overwriting existing files""" dest_par = os.path.dirname(dest) for root, dirs, files in os.walk(source): if not os.path.isdir(root): os.makedirs(root) for mdir in dirs: try: dest_path = os.path.join(dest_par, root, mdir) if not os.path.isdir(dest_path): os.makedirs(dest_path) except: pass for file in files: rel_path = root.replace(source, '').lstrip(os.sep) dest_path = os.path.join(dest, rel_path) if not os.path.isdir(dest_path): os.makedirs(dest_path) cpy_src = os.path.join(root, file) cpy_dest = os.path.join(dest_path, file) shutil.copyfile(cpy_src, cpy_dest) shutil.copymode(cpy_src, cpy_dest) def CheckTars(container_dir, image_name, logger): here = os.getcwd() if container_dir.endswith('/'): container_dir = container_dir[:-1] tar_list = os.listdir(container_dir) manifest_name = '%s-home_tar.list' % image_name lab_dir = os.path.dirname(container_dir) logger.debug('container_dir is %s' % container_dir) manifest = os.path.join(lab_dir, 'config', manifest_name) for f in tar_list: full = os.path.join(container_dir, f) if os.path.isdir(full) and f.endswith('_tar'): if os.path.isdir(tmp_loc): logger.debug('remove tree at %s' % tmp_loc) shutil.rmtree(tmp_loc) os.mkdir(tmp_loc) os.chdir(full) tmp_name = f[:-4] tar_name = tmp_name+'.tar' logger.debug('check for %s' % tar_name) if not os.path.isfile(tar_name): ''' no tar, make one ''' logger.debug('no tar %s, make one' % tar_name) f_list = os.listdir('./') if len(f_list) == 0: #print('no files, make empty') ''' no files at all, create empty archive ''' cmd = 'tar cvf %s --files-from /dev/null' % tar_name os.system(cmd) logger.debug('did %s' % cmd) else: if external in f_list: ''' external manifest, expand that ''' logger.debug('expand manifest at %s' % full) expandManifest(full, tar_name) for cfile in f_list: logger.debug('cfile is %s' % cfile) if cfile != external: if os.path.isdir(cfile): logger.debug('copydir %s' % cfile) copydir(cfile, os.path.join(tmp_loc, cfile)) else: logger.debug('copyfile %s' % cfile) shutil.copyfile(cfile, os.path.join(tmp_loc, cfile)) os.chdir(tmp_loc) full_tar = os.path.join(full, tar_name) if f == 'home_tar': cmd = 'tar czf %s --owner=:1000 --group=:1000 `ls -A -1` > %s' % (full_tar, manifest) else: cmd = 'tar czf %s --owner=root --group=root `ls -A -1`' % (full_tar) os.system(cmd) logger.debug('did %s' % cmd) else: ''' is a tar file, should it be updated? ''' os.chdir(full) newest = newest_file_in_tree('./') logger.debug('newest is %s' % newest) referenced_tar_newer = False if os.path.isfile(external): latest_ref = newest_referenced_tar(full, tar_name) logger.debug('has manifest, is referenced file (%s) newer than local tar?' % latest_ref) if os.stat(latest_ref).st_mtime > os.stat(tar_name).st_mtime: referenced_tar_newer = True if referenced_tar_newer or not newest.endswith(tar_name): os.remove(tar_name) flist = os.listdir('./') for f in flist: if f == external: continue fpath = os.path.join(tmp_loc,f) if not os.path.isfile(fpath): shutil.copytree(f , fpath) else: shutil.copyfile(f , fpath) ''' something is newer than the tar, need to update tar ''' if os.path.isfile(os.path.join('./', external)): expandManifest(full, tar_name) os.chdir(tmp_loc) full_tar = os.path.join(full, tar_name) if f == 'home_tar': cmd = 'tar czf %s `ls -A -1` > %s' % (full_tar, manifest) else: cmd = 'tar czf %s `ls -A -1`' % (full_tar) os.system(cmd) logger.debug(cmd) #print('did %s' % cmd) else: ''' tar file is the most recent. ensure we have a manifest ''' if f == 'home_tar' and not os.path.isfile(manifest): os.chdir(full) cmd = 'tar tf %s > %s' % (tar_name, manifest) os.system(cmd) logger.debug(cmd) if os.path.isdir(tmp_loc): logger.debug('remove tree at %s' % tmp_loc) shutil.rmtree(tmp_loc) os.chdir(here) def __main__(): container_dir = sys.argv[1] image_name = sys.argv[2] CheckTars(container_dir, image_name)