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|
#coding:utf-8
#!/usr/bin/python3
#
# Copyright (c) 2007-2009 Canonical Ltd.
#
# Author: Oliver Grawert <ogra@ubuntu.com>
#
# Modifications 2013 from papoteur <papoteur@mageialinux-online.org>
# and Geiger David <david.david@mageialinux-online.org>
#
# 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 2 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, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
###########
# imports #
###########
#import locale
import os
import io
import sys
import gettext
from subprocess import call, Popen, PIPE
import hashlib
import gnupg
import time
import logging
class Dumper(object):
def _do_write(self,source,target, b):
# Writing step
#Dump mode
self.returncode=0
self.operation=True
bs=4096*128
try:
ifc=io.open(source, "rb",1)
except:
message = _('Reading error.')+ source
logging.debug(message)
self.return_state = False
self.return_message = message
self.finished.set()
return
else:
try:
ofc= io.open(target, 'wb',0)
except:
message = _("You don't have permission to write to the device {}").format(target)
logging.error(message)
self.return_state = False
self.return_message = message
self.finished.set()
return
else:
self.operation=True
steps=list(range(0, b+1, int(b/100)))
steps.append(b)
indice=1
written=0
ncuts=int(b/bs)
while ncuts <= 100:
bs=int(bs/2)
ncuts=int(b/bs)
for i in range(0,int(ncuts)+1):
try:
buf=ifc.read(bs)
except:
message = _("Reading error.")
logging.error(message)
self.return_state = False
self.return_message = message
self.finished.set()
return
try:
ofc.write(buf)
except:
message = _("Writing error.")
logging.debug(message)
self.return_state = False
self.return_message = message
self.finished.set()
return
written+=len(buf)
if written > steps[indice]:
if indice%1==0:
self._progress = indice
indice +=1
try:
os.fsync(ofc)
except:
message = _("Writing error.")
logging.debug(message)
self.return_state = False
self.return_message = message
self.finished.set()
return
try:
ofc.close()
except:
message = _("Writing error.")
logging.error(message)
self.return_message = message
self.return_state = False
return
ifc.close()
self._progress = 100
self.finished.set()
self.return_state = True
self.return_message = _("Writing terminated")
logging.debug(self.return_message)
return
def _do_unmount(self, target):
target = target[0]
logging.debug("Starting unmounting")
message = _("No partition is mounted.")
retcode = 0
try:
lines = [line.strip("\n").split(" ") for line in open ("/etc/mtab", "r").readlines()]
mounts = [mount for mount in lines if mount[0].startswith(target)]
except:
message = _('Could not read mtab ! {} {}'.format(os.getuid(),target))
return False, message
if mounts:
message =_("Unmounting all partitions of {}:\n").format(target)
print(message)
for mount in mounts:
message +=_("Trying to unmount {}...\n").format(mount[0])
try:
retcode = call('umount '+mount[0], shell=True)
if retcode == 32:
message += _('Partition {} is busy').format(mount[0])
elif retcode< 0:
message += _('Error, umount {} was terminated by signal {}').format(mount[0],retcode)
elif retcode == 0:
message += _('{} successfully unmounted').format(mount[0])
else:
message += _('Error, umount returned {}').format(str(retcode))
except OSError as e:
message += _('Execution failed: {}').format(str(e))
print(message, file=sys.stderr)
logging.info(message)
return not bool(retcode), message
def _get_sum(self, source):
self.return_state = False
logging.debug("Starting getting sum")
# Check if the sum file has a valid signature
gpg = gnupg.GPG()
gpg.encoding = 'utf-8'
# Use Mageia public key
sum_type = 'sha3'
sig_file = "{}.{}.gpg".format(source, sum_type)
source_file = "{}.{}".format(source, sum_type)
try:
gpg.recv_keys('pgp.mit.edu', 'EDCA7A90')
self.sum_check_searched = True
with open(sig_file, 'rb') as g:
self.signature_found = True
verified = gpg.verify_file(g, source_file)
if verified.valid:
self.signature_checked = True
logging.debug("signature checked")
else:
self.signature_checked = False
except:
self.signature_found = False
logging.info(_("Signature file {} not found\n").format(sig_file))
try:
# Look for sum files in the same directory as source
with open(source_file,'r') as fs:
# Read the sum in the file
self.sum_check=(fs.readline()).split()[0]
self.sum_file = True
except:
logging.info(_("Sum file {} not found\n").format(source_file))
self.sum_file = False
def _check_write(self, target, source):
logging.debug("Start checking")
self.return_state = False
self.return_message = ""
b = os.path.getsize(source)
# Compute the sum from the written device
steps=list(range(0, b+1, int(b/100)))
steps.append(b)
indice=0
checked=0
sha512func=hashlib.sha3_512()
ncuts=int(b/1024)
#try:
with open(target, 'rb') as f:
for x in range(0,ncuts):
block = f.read(1024)
sha512func.update(block)
if checked > steps[indice]:
self._progress = indice
indice +=1
checked+=1024
block = f.read(b-ncuts*1024)
sha512func.update(block)
sha512sumcalc=sha512func.hexdigest()
f.close()
if self.signature_found and not self.signature_checked:
#, keep the pourcent, this is the place for source file name
self.return_message = _('Invalid signature for %s')%source_file
if (self.sum_check == "") : # Can't get stored sum
self.return_message += _('SHA3 sum: {}').format(sha512sumcalc)
# compare the sums
elif (sha512sumcalc == self.sum_check) :
if self.signature_checked:
#, keep the bracket, this is the place for sum type
self.return_message +="\n" + _("The {} sum check is OK and the sum is signed").format(sum_type)
else :
#, keep the bracket, this is the place for sum type
self.return_message +="\n" + _("The {} sum check is OK but the signature can't be found").format(sum_type)
else:
self.return_message +="\n" + _("/!\\The computed and stored sums don't match")
#except:
#pass
self._progress = 100
logging.info(self.return_message)
self.return_state = True
self.finished.set()
def _do_persistence(self, target, label, key):
logging.debug("Start doing persistence partition")
p = Popen(["fdisk",target], stdin = PIPE, stderr=PIPE)
outs, errs = p.communicate(input=b'n\np\n3\n\n\nw\n')
working=True
while working:
time.sleep(0.5)
p.poll()
rc=p.returncode
if rc is None:
working=True
else:
process = None
working= False
if rc != 0:
self.return_state = False
self.return_message = _("Error while doing persistent partition: ") + errs.decode('utf-8')
return
logging.debug("New partition created")
if key == "":
# example mkfs.ext4 -L mgalive-persist /dev/sdf3
process = Popen(['mkfs.ext4','-L', label, target+"3"],sterr=PIPE)
outs, errs = p.communicate()
working=True
while working:
time.sleep(0.5)
process.poll()
rc=process.returncode
if rc is None:
working=True
else:
process = None
working= False
if rc == 0:
self.return_state = True
self.return_message = _("Persistent partition done")
else:
self.return_state = False
self.return_message = _("Error while doing persistent partition: ") + errs
return
logging.info("Persistent partition done")
else:
# example cryptsetup luksFormat /dev/sdb3
print("Crypt key provided",file=sys.stderr)
base_target = os.path.basename(target) + "3"
process = Popen(['cryptsetup','luksFormat','-q', target+"3", '-d', '-'],stdin=PIPE, stderr=PIPE)
outs, errs = process.communicate(input=key.encode('utf-8'))
working=True
while working:
time.sleep(0.5)
process.poll()
rc=process.returncode
if rc is None:
working=True
else:
process = None
working= False
if rc != 0:
self.return_state = False
self.return_message = _("Error while doing persistent partition: ") + errs
logging.error(self.return_message)
return
# cryptsetup open /dev/sdb3 crypt_sdb3
process = Popen(['cryptsetup','luksOpen', target + "3", 'crypt_' + base_target ,'-d','-'],stdin=PIPE, stderr=PIPE)
outs, errs = process.communicate(input=key.encode('utf-8'))
working=True
while working:
time.sleep(0.5)
process.poll()
rc=process.returncode
if rc is None:
working=True
else:
process = None
working= False
if rc != 0:
self.return_state = False
self.return_message = _("Error while doing persistent partition: ") + errs
logging.error(self.return_message)
return
# mkfs.ext4 -L mgalive-persist /dev/mapper/crypt_sdb3
process = Popen(['mkfs.ext4','-L', label, '/dev/mapper/crypt_' + base_target],stderr=PIPE)
outs, errs = process.communicate()
working=True
while working:
time.sleep(0.5)
process.poll()
rc=process.returncode
if rc is None:
working=True
else:
process = None
working= False
if rc != 0:
self.return_state = False
self.return_message = _("Error while doing persistent partition: ") + errs
logging.error(self.return_message)
return
# cryptsetup close crypt_sdb3
process = Popen(['cryptsetup','luksClose', 'crypt_' + base_target ])
outs, errs = process.communicate()
working=True
while working:
time.sleep(0.5)
process.poll()
rc=process.returncode
if rc is None:
working=True
else:
process = None
working= False
if rc != 0:
self.return_state = False
self.return_message = _("Error while doing persistent partition: ") + errs
logging.error(self.return_message)
else:
self.return_state = True
self.return_message = _("Persistent partition done")
logging.info("Persistent partition done")
def __init__(self):
gettext.install('isodumper', localedir='/usr/share/locale')
# Operation running
self.operation=False
|
