def main(self):
pbar = self.get_progressbar(maxval=self.args.get('image_size'))
unbundle_out_r, unbundle_out_w = open_pipe_fileobjs()
unbundle_sha1_r = create_unbundle_pipeline(
self.args['source'], unbundle_out_w, self.args['enc_key'],
self.args['enc_iv'], debug=self.debug)
unbundle_out_w.close()
actual_size = copy_with_progressbar(unbundle_out_r, self.args['dest'],
progressbar=pbar)
actual_sha1 = unbundle_sha1_r.recv()
unbundle_sha1_r.close()
expected_sha1 = self.args.get('sha1_digest') or ''
expected_sha1 = expected_sha1.lower().strip('0x')
expected_size = self.args.get('image_size')
if expected_sha1 and expected_sha1 != actual_sha1:
self.log.error('rejecting unbundle due to SHA1 mismatch '
'(expected SHA1: %s, actual: %s)',
expected_sha1, actual_sha1)
raise RuntimeError('bundle appears to be corrupt (expected SHA1: '
'{0}, actual: {1})'
.format(expected_sha1, actual_sha1))
expected_size = self.args.get('image_size')
if expected_size and expected_size != actual_size:
self.log.error('rejecting unbundle due to size mismatch '
'(expected: %i, actual: %i)',
expected_size, actual_size)
raise RuntimeError('bundle appears to be corrupt (expected size: '
'{0}, actual: {1})'
.format(expected_size, actual_size))
return actual_sha1, actual_size
def __init__(self, tarball):
"""
This method takes a tarfile.TarFile object and spawns *two* new
processes: an xz process for decompression and an additional
python process that simply feeds data from the TarFile to it.
The latter is necessary because the file-like object we get from
TarFile.extractfile cannot be passed to a subprocess directly.
For that reason, one is also free to close the tarball after
this object is created.
"""
self.__subp_pid = None
self.__read_fh = None
member = tarball.getmember(IMAGE_ARCNAME)
compressed_image = tarball.extractfile(member)
pipe_r, pipe_w = open_pipe_fileobjs()
self.__subp_pid = os.fork()
if self.__subp_pid == 0:
os.setpgrp()
pipe_r.close()
self.__xz_proc = subprocess.Popen(('xz', '-d'),
stdin=subprocess.PIPE,
stdout=pipe_w,
close_fds=True)
pipe_w.close()
shutil.copyfileobj(compressed_image, self.__xz_proc.stdin)
self.__xz_proc.stdin.close()
self.__xz_proc.wait()
os._exit(os.EX_OK)
else:
self.__read_fh = pipe_r
def main(self):
pbar = self.get_progressbar(maxval=self.args.get('image_size'))
unbundle_out_r, unbundle_out_w = open_pipe_fileobjs()
unbundle_sha1_r = create_unbundle_pipeline(self.args['source'],
unbundle_out_w,
self.args['enc_key'],
self.args['enc_iv'],
debug=self.debug)
unbundle_out_w.close()
actual_size = copy_with_progressbar(unbundle_out_r,
self.args['dest'],
progressbar=pbar)
actual_sha1 = int(unbundle_sha1_r.recv(), 16)
unbundle_sha1_r.close()
expected_sha1 = int(self.args.get('sha1_digest') or '0', 16)
expected_size = self.args.get('image_size')
if expected_sha1 and expected_sha1 != actual_sha1:
self.log.error(
'rejecting unbundle due to SHA1 mismatch '
'(expected SHA1: %x, actual: %x)', expected_sha1, actual_sha1)
raise RuntimeError('bundle appears to be corrupt (expected SHA1: '
'{0:x}, actual: {1:x})'.format(
expected_sha1, actual_sha1))
expected_size = self.args.get('image_size')
if expected_size and expected_size != actual_size:
self.log.error(
'rejecting unbundle due to size mismatch '
'(expected: %i, actual: %i)', expected_size, actual_size)
raise RuntimeError('bundle appears to be corrupt (expected size: '
'{0}, actual: {1})'.format(
expected_size, actual_size))
return actual_sha1, actual_size
def main(self):
manifest = BundleManifest.read_from_fileobj(
self.args['manifest'], privkey_filename=self.args['privatekey'])
for part in manifest.image_parts:
part_path = os.path.join(self.args['source'], part.filename)
while part_path.startswith('./'):
part_path = part_path[2:]
if os.path.exists(part_path):
part.filename = part_path
else:
raise RuntimeError(
"bundle part '{0}' does not exist; you may need to use "
"-s to specify where to find the bundle's parts"
.format(part_path))
part_reader_out_r, part_reader_out_w = open_pipe_fileobjs()
part_reader = multiprocessing.Process(
target=self.__read_bundle_parts,
args=(manifest, part_reader_out_w))
part_reader.start()
part_reader_out_w.close()
waitpid_in_thread(part_reader.pid)
image_filename = os.path.join(self.args['destination'],
manifest.image_name)
with open(image_filename, 'w') as image:
unbundlestream = UnbundleStream.from_other(
self, source=part_reader_out_r, dest=image,
enc_key=manifest.enc_key, enc_iv=manifest.enc_iv,
image_size=manifest.image_size,
sha1_digest=manifest.image_digest,
show_progress=self.args.get('show_progress', False))
unbundlestream.main()
return image_filename
def __init__(self, tarball):
"""
This method takes a tarfile.TarFile object and spawns *two* new
processes: an xz process for decompression and an additional
python process that simply feeds data from the TarFile to it.
The latter is necessary because the file-like object we get from
TarFile.extractfile cannot be passed to a subprocess directly.
For that reason, one is also free to close the tarball after
this object is created.
"""
self.__subp_pid = None
self.__read_fh = None
member = tarball.getmember(IMAGE_ARCNAME)
compressed_image = tarball.extractfile(member)
pipe_r, pipe_w = open_pipe_fileobjs()
self.__subp_pid = os.fork()
if self.__subp_pid == 0:
os.setpgrp()
pipe_r.close()
self.__xz_proc = subprocess.Popen(
('xz', '-d'), stdin=subprocess.PIPE, stdout=pipe_w,
close_fds=True)
pipe_w.close()
shutil.copyfileobj(compressed_image, self.__xz_proc.stdin)
self.__xz_proc.stdin.close()
self.__xz_proc.wait()
os._exit(os.EX_OK)
else:
self.__read_fh = pipe_r
def main(self):
manifest = self.fetch_manifest(
self.service, privkey_filename=self.args['privatekey'])
download_out_r, download_out_w = open_pipe_fileobjs()
try:
self.__create_download_pipeline(download_out_w)
finally:
download_out_w.close()
image_filename = self.__open_dest(manifest)
unbundlestream = UnbundleStream.from_other(
self, source=download_out_r, dest=self.args['dest'],
enc_key=manifest.enc_key, enc_iv=manifest.enc_iv,
image_size=manifest.image_size, sha1_digest=manifest.image_digest,
show_progress=self.args.get('show_progress', False))
unbundlestream.main()
return image_filename
def main(self):
manifest = self.fetch_manifest(
self.service, privkey_filename=self.args['privatekey'])
download_out_r, download_out_w = open_pipe_fileobjs()
try:
self.__create_download_pipeline(download_out_w)
finally:
download_out_w.close()
image_filename = self.__open_dest(manifest)
unbundlestream = UnbundleStream.from_other(
self, source=download_out_r, dest=self.args['dest'],
enc_key=manifest.enc_key, enc_iv=manifest.enc_iv,
image_size=manifest.image_size, sha1_digest=manifest.image_digest,
show_progress=self.args.get('show_progress', False))
unbundlestream.main()
return image_filename
def main(self):
pbar = self.args.get('progressbar', None)
manifest = self.args.get('manifest')
enc_key = self.args.get('enc_key')
enc_iv = self.args.get('enc_iv')
debug = self.args.get('debug')
maxbytes = self.args.get('maxbytes')
#Setup the destination fileobj...
if isinstance(self.args.get('destination'), file):
#Use provided file obj...
self.log.debug('Writing image to provided fileobj')
dest_file = self.args.get('destination')
dest_file_name = str(dest_file.name)
self.log.debug('Writing image to provided fileobj:'
+ dest_file_name)
elif self.args.get('destination') == '-':
#Use stdout...
self.log.debug('Writing image to stdout')
dest_file_name = '<stdout>'
dest_file = os.fdopen(os.dup(os.sys.stdout.fileno()), 'w')
else:
#Open file at path provided...
self.log.debug('Writing image to ')
dest_file_name = self.args.get('destination')
dest_file = open(self.args.get('destination'), 'w')
#Start the unbundle...
try:
if self.args.get('source') and not self.args.get('source') == "-":
if isinstance(self.args.get('source'), file):
self.log.debug('Reading from provided fileobj')
infile = self.args.get('source')
else:
self.log.debug('Reading from file at path %s',
str(self.args.get('source')))
infile = open(self.args.get('source'))
else:
#Unbundle from stdin stream...
self.log.debug('Reading from stdin')
infile = os.fdopen(os.dup(os.sys.stdin.fileno()))
try:
progress_r, progress_w = open_pipe_fileobjs()
sha1pipe = create_unbundle_pipeline(
infile=infile, outfile=progress_w, enc_key=enc_key,
enc_iv=enc_iv, debug=debug)
progress_w.close()
copy_with_progressbar(infile=progress_r, outfile=dest_file,
progressbar=pbar, maxbytes=maxbytes)
progress_r.close()
finally:
if infile:
infile.close()
if progress_r:
progress_r.close()
if progress_w:
progress_w.close()
digest = sha1pipe.recv()
if manifest:
#Verify the resulting unbundled Checksum matches the manifest
if digest != manifest.image_digest:
raise ValueError('Digest mismatch. '
'Extracted image appears to be corrupt '
'(expected digest: {0}, actual: {1})'
.format(manifest.image_digest, digest))
self.log.debug("\nExpected digest:{0}\n Actual digest:{1}"
.format(manifest.image_digest, digest))
self.log.debug('Wrote stream to destination:' + dest_file_name)
self.log.debug('Digest for unbundled image:' + str(digest))
except KeyboardInterrupt:
print 'Caught keyboard interrupt'
return
return digest
def main(self):
dest_dir = self.args.get('destination')
manifest = self.args.get('manifest')
#Setup the destination fileobj...
if dest_dir == "-":
#Write to stdout
dest_file = os.fdopen(os.dup(os.sys.stdout.fileno()), 'w')
dest_file_name = None
else:
#write to local file path...
dest_file = open(dest_dir + "/" + manifest.image_name, 'w')
dest_file_name = dest_file.name
#check for avail space if the resulting image size is known
if manifest:
d_stat = os.statvfs(dest_file_name)
avail_space = d_stat.f_frsize * d_stat.f_favail
if manifest.image_size > avail_space:
raise ValueError('Image size:{0} exceeds destination free '
'space:{1}'
.format(manifest.image_size, avail_space))
#setup progress bar...
try:
label = self.args.get('progressbar_label', 'UnBundling image')
pbar = self.get_progressbar(label=label,
maxval=manifest.image_size)
except NameError:
pbar = None
try:
#Start the unbundle...
unbundle_r, unbundle_w = open_pipe_fileobjs()
writer = spawn_process(self._concatenate_parts_to_file_for_pipe,
outfile=unbundle_w,
image_parts=manifest.image_parts,
source_dir=self.args.get('source'),
debug=self.args.get('debug'))
unbundle_w.close()
waitpid_in_thread(writer.pid)
self.log.debug('Using enc key:' + str(manifest.enc_key))
self.log.debug('using enc iv:' + str(manifest.enc_iv))
digest = UnbundleStream(source=unbundle_r,
destination=dest_file,
enc_key=manifest.enc_key,
enc_iv=manifest.enc_iv,
progressbar=pbar,
maxbytes=self.args.get('maxbytes'),
config=self.config).main()
digest = digest.strip()
if dest_file:
dest_file.close()
#Verify the Checksum matches the manifest
if digest != manifest.image_digest:
raise ValueError('Digest mismatch. Extracted image appears '
'to be corrupt (expected digest: {0}, '
'actual: {1})'
.format(manifest.image_digest, digest))
self.log.debug("\nExpected digest:{0}\n Actual digest:{1}"
.format(str(manifest.image_digest), str(digest)))
except KeyboardInterrupt:
print 'Caught keyboard interrupt'
if dest_file:
os.remove(dest_file.name)
return
except Exception:
traceback.print_exc()
if dest_file:
try:
os.remove(dest_file.name)
except OSError:
print "Could not remove failed destination file."
raise
finally:
dest_file.close()
return dest_file_name
