#!/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 os import sys import json import subprocess import VersionInfo ''' Return creation date and user of a given image from a local registry, i.e., the test registry. ''' def inspectLocal(image, lgr, test_registry, is_rebuild=False, quiet=False, no_pull=False): use_tag = 'latest' lgr.debug('inspectLocal image %s' % image) digest = getDigest(image, 'latest', test_registry) if digest is None: return None, None, None, None, None lgr.debug('inspectLocal digest %s' % digest) created, user, version, base = getCreated(image, digest, test_registry) #print('base is %s' % base) if not no_pull and base is not None: base_image, base_id = base.rsplit('.', 1) my_id = VersionInfo.getImageId(base_image, quiet) if my_id == base_id: pass #print('got correct base_id') else: print('got WRONG base_id for base %s used in %s my: %s base: %s' % (base_image, image, my_id, base_id)) tlist = getTags(image, test_registry) need_tag = 'base_image%s' % my_id if is_rebuild or need_tag in tlist: use_tag = need_tag elif quiet: cmd = 'docker pull %s' % base_image os.system(cmd) else: print('**************************************************') print('* This lab will require a download of *') print('* several hundred megabytes. *') print('**************************************************') if sys.version_info >=(3,0): confirm = str(input('Continue? (y/n)')).lower().strip() else: confirm = str(raw_input('Continue? (y/n)')).lower().strip() if confirm != 'y': print('Exiting lab') exit(0) else: print('Please wait for download to complete...') cmd = 'docker pull %s' % base_image os.system(cmd) print('Download has completed. Wait for lab to start.') return created, user, version, use_tag, base def checkRegistryExists(test_registry, lgr): cmd = 'curl http://%s/v2/' % test_registry retval = True ps = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,stderr=subprocess.PIPE) output = ps.communicate() if len(output[0]) > 0: val = output[0].decode('utf-8') if val.strip() != '{}': lgr.error('Registry %s not reachable: %s' % (test_registry, output[0].decode('utf-8'))) retval = False else: lgr.error('Registry %s not reachable: %s' % (test_registry, output[0].decode('utf-8'))) retval = False return retval def getTags(image, test_registry): cmd = 'curl --silent --header "Accept: application/vnd.docker.distribution.manifest.v2+json" "http://%s/v2/%s/tags/list"' % (test_registry, image) ps = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,stderr=subprocess.PIPE) output = ps.communicate() if len(output[0].strip()) > 0: j = json.loads(output[0].decode('utf-8')) if 'tags' in j: return j['tags'] else: return None else: return None def getDigest(image, tag, test_registry): cmd = 'curl --silent --header "Accept: application/vnd.docker.distribution.manifest.v2+json" "http://%s/v2/%s/manifests/%s"' % (test_registry, image, tag) ps = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,stderr=subprocess.PIPE) output = ps.communicate() if len(output[0].strip()) > 0: j = json.loads(output[0].decode('utf-8')) if 'config' in j: return j['config']['digest'] else: return None else: return None def getCreated(image, digest, test_registry): cmd = 'curl --silent --location "http://%s/v2/%s/blobs/%s"' % (test_registry, image, digest) ps = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,stderr=subprocess.PIPE) output = ps.communicate() if len(output[0].strip()) > 0: j = json.loads(output[0].decode('utf-8')) #print j['container_config']['User'] version = None base = None if 'version' in j['container_config']['Labels']: version = j['container_config']['Labels']['version'] if 'base' in j['container_config']['Labels']: base = j['container_config']['Labels']['base'] if '/' in base: base = '%s/%s' % (test_registry, base.split('/')[1]) return j['created'], j['container_config']['User'], version, base #created, user, version, use_tag = inspectLocal('radius.radius.student', 'testregistry:5000', True) #print '%s user: %s version: %s use_tag %s' % (created, user, version, use_tag)