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#!/usr/bin/env python
# release.py
# Copyright (C) 2014 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Tool to generate TUF related files after a release
The 'repo' folder should contain two folders:
- 'metadata.staged' with all the jsons from the previows release
- 'targets' where the release targets are
"""
import datetime
import os.path
import sys
from tuf.repository_tool import load_repository
from tuf.repository_tool import import_rsa_privatekey_from_file
"""
Days until the expiration of targets.json and snapshot.json. After this ammount
of days the TUF client won't accept this files.
"""
EXPIRATION_DAYS = 90
def usage():
print "Usage: %s repo key" % (sys.argv[0],)
def main():
if len(sys.argv) < 3:
usage()
return
repo_path = sys.argv[1]
key_path = sys.argv[2]
targets = Targets(repo_path, key_path)
targets.build()
print "%s/metadata.staged/(targets|snapshot).json[.gz] are ready" % \
(repo_path,)
class Targets(object):
"""
Targets builder class
"""
def __init__(self, repo_path, key_path):
"""
Constructor
:param repo_path: path where the repo lives
:type repo_path: str
:param key_path: path where the private targets key lives
:type key_path: str
"""
self._repo_path = repo_path
self._key = import_rsa_privatekey_from_file(key_path)
def build(self):
"""
Generate snapshot.json[.gz] and targets.json[.gz]
"""
self._repo = load_repository(self._repo_path)
self._load_targets()
self._repo.targets.load_signing_key(self._key)
self._repo.snapshot.load_signing_key(self._key)
self._repo.targets.compressions = ["gz"]
self._repo.snapshot.compressions = ["gz"]
self._repo.snapshot.expiration = (
datetime.datetime.now() +
datetime.timedelta(days=EXPIRATION_DAYS))
self._repo.targets.expiration = (
datetime.datetime.now() +
datetime.timedelta(days=EXPIRATION_DAYS))
self._repo.write_partial()
def _load_targets(self):
"""
Load a list of targets
"""
targets_path = os.path.join(self._repo_path, 'targets')
target_list = self._repo.get_filepaths_in_directory(
targets_path,
recursive_walk=True,
followlinks=True)
self._remove_obsolete_targets(target_list)
for target in target_list:
octal_file_permissions = oct(os.stat(target).st_mode)[3:]
custom_file_permissions = {
'file_permissions': octal_file_permissions
}
self._repo.targets.add_target(target, custom_file_permissions)
def _remove_obsolete_targets(self, target_list):
"""
Remove obsolete targets from TUF targets
:param target_list: list of targets on full path comming from TUF
get_filepaths_in_directory
:type target_list: list(str)
"""
targets_path = os.path.join(self._repo_path, 'targets')
relative_path_list = map(lambda t: t.split("/targets")[1], target_list)
removed_targets = (set(self._repo.targets.target_files.keys())
- set(relative_path_list))
for target in removed_targets:
target_rel_path = target
if target[0] == '/':
target_rel_path = target[1:]
target_path = os.path.join(targets_path, target_rel_path)
self._repo.targets.remove_target(target_path)
if __name__ == "__main__":
main()
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