aboutsummaryrefslogtreecommitdiffstats
path: root/backend/raw_write.py
blob: 30b658c6a296505459a5829726c1c349756629b5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
#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.

import gettext
import hashlib
import io
import logging
###########
# imports #
###########
# import locale
import os
import sys
import time
from subprocess import Popen, PIPE

import gnupg


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 _get_sum(self, source):
        self.return_state = False
        mageia_keyid = "835E41F4EDCA7A90"
        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
        self.sum_type = 'sha3'
        sig_file = "{}.{}.gpg".format(source, self.sum_type)
        self.source_file = "{}.{}".format(source, self.sum_type)
        try:
            keys_list = gpg.list_keys()
            if mageia_keyid in [entry['keyid'] for entry in keys_list]:
                logging.info("Mageia key already present")
            else:
                gpg.recv_keys('pool.sks-keyservers.net', mageia_keyid)
            self.sum_check_searched = True
            with open(sig_file, 'rb') as g:
                self.signature_found = True
                verified = gpg.verify_file(g)
                if verified:
                    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(self.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(self.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
            logging.debug("last read %d"%(b-ncuts*1024))
            block = f.read(b-ncuts*1024)
            sha512func.update(block)
            sha512sumcalc=sha512func.hexdigest().upper()
        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')%self.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(self.sum_type)
            else :
                if self.signature_found:
                    self.return_message +="\n" + _("The signature of the sum is false !").format(self.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(self.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 udev_wait(self, operation):
        wait = Popen(["udevadm","settle","--timeout=15"], stderr=PIPE)
        wait.communicate()
        working=True
        while working:
            time.sleep(0.5)
            wait.poll()
            rc=wait.returncode
            if not (rc is None):
                wait = None
                working= False
        if rc != 0:
            self.return_state = False
            self.return_message = _("Timeout reached when {}".format(operation))
            return False
        return True
        

    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:
            if rc == 1:
                # the error is  Re-reading the partition table failed.: Device or resource busy
                logging.error(_("Error {} while doing persistent partition: {}").format(rc, errs.decode('utf-8')))
                logging.error(_("Try reloading partition table"))
                p = Popen(["partprobe",target], stdin = PIPE, stderr=PIPE)
                outs, errs = p.communicate()
                working=True
                while working:
                    time.sleep(0.5)
                    p.poll()
                    rc=p.returncode
                    if not (rc is None):
                        process = None
                        working= False 
                    else:
                        self.return_state = False
                        self.return_message = _("Unable to reload the partition table: {}").format(errs.decode('utf-8'))
                        logging.error(self.return_message)
                        self.finished.set()
                        return
            else:
                self.return_state = False
                self.return_message = _("Error {} while doing persistent partition: {}").format(rc, errs.decode('utf-8'))
                logging.error(self.return_message)
                self.finished.set()
                return
        logging.debug("New partition created")
        self._progress = 25

        # Wait for propagation of the info of new partition table
        if not self.udev_wait("creating a new partition table"):
            return
        if key == "":
            # example mkfs.ext4 -L mgalive-persist /dev/sdf3
            self.return_message = _("Persistent partition added. Formatting...")
            process = Popen(['mkfs.ext4', "-q",'-F','-L', label,  target+"3"],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 = True
                self._progress = 100
                self.return_message = _("Persistent partition done")
            else:
                self.return_state = False
                self.return_message = _("Error {} while doing persistent partition: {}").format(rc, errs.decode('utf-8'))
                self.finished.set()
                return
            logging.info("Persistent partition done")
            if not self.udev_wait(_("formatting partition")):
                return
        else:
            # example cryptsetup luksFormat /dev/sdb3
            self.return_message = _("Persistent partition added. Encrypting...")
            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: {}").format(rc, errs.decode('utf-8'))
                logging.error(self.return_message)
                self.finished.set()
                return
            self._progress = 50
            self.return_message = _("Persistent partition encrypted. Opening...")
            # cryptsetup open /dev/sdb3 crypt_sdb3
            if not self.udev_wait("creating encrypted partition"):
                return

            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: {}").format(rc, errs.decode('utf-8')) 
                logging.error(self.return_message)
                self.finished.set()
                return

            if not self.udev_wait(_("opening encrypted partition")):
                return
            self._progress = 60
            self.return_message = _("Persistent partition opened: formatting...")
            # mkfs.ext4 -L mgalive-persist /dev/mapper/crypt_sdb3
            process = Popen(['mkfs.ext4','-q','-F','-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: {}").format(rc, errs.decode('utf-8')) 
                logging.error(self.return_message)
                self.finished.set()
                return
            self._progress = 90
            # cryptsetup close crypt_sdb3

            if not self.udev_wait(_("formatting encrypted partition")):
                return
            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: {}").format(rc, errs.decode('utf-8'))
                logging.error(self.return_message)
            else:
                self.return_state = True
                self.return_message = _("Persistent partition done")
                logging.info(self.return_message)
            if not self.udev_wait(_("closing encrypted partition")):
                return
        self._progress = 100
        self.finished.set()
        logging.debug("Finished")


    def __init__(self):
        gettext.install('isodumper', localedir='/usr/share/locale')
        # Operation running
        self.operation=False