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
|
import glob, re, os, json
from collections import OrderedDict
from helpers.general import sys_command
from exceptions import *
ROOT_DIR_PATTERN = re.compile('^.*?/devices')
GPT = 0b00000001
class BlockDevice():
def __init__(self, path, info):
self.path = path
self.info = info
@property
def device(self):
"""
Returns the actual device-endpoint of the BlockDevice.
If it's a loop-back-device it returns the back-file,
If it's a ATA-drive it returns the /dev/X device
And if it's a crypto-device it returns the parent device
"""
if not 'type' in self.info: raise DiskError(f'Could not locate backplane info for "{self.path}"')
if self.info['type'] == 'loop':
for drive in json.loads(b''.join(sys_command(f'losetup --json', hide_from_log=True)).decode('UTF_8'))['loopdevices']:
if not drive['name'] == self.path: continue
return drive['back-file']
elif self.info['type'] == 'disk':
return self.path
elif self.info['type'] == 'crypt':
if not 'pkname' in self.info: raise DiskError(f'A crypt device ({self.path}) without a parent kernel device name.')
return f"/dev/{self.info['pkname']}"
@property
def partitions(self):
o = b''.join(sys_command(f'partprobe {self.path}'))
parts = OrderedDict()
#o = b''.join(sys_command('/usr/bin/lsblk -o name -J -b {dev}'.format(dev=dev)))
o = b''.join(sys_command(f'/usr/bin/lsblk -J {self.path}'))
if b'not a block device' in o:
raise DiskError(f'Can not read partitions off something that isn\'t a block device: {self.path}')
if not o[:1] == b'{':
raise DiskError(f'Error getting JSON output from:', f'/usr/bin/lsblk -J {self.path}')
r = json.loads(o.decode('UTF-8'))
if len(r['blockdevices']) and 'children' in r['blockdevices'][0]:
root_path = f"/dev/{r['blockdevices'][0]['name']}"
for part in r['blockdevices'][0]['children']:
part_id = part['name'][len(os.path.basename(self.path)):]
parts[part_id] = {
'size' : part['size'],
'id' : part_id,
'path' : root_path + part_id
}
return {k: parts[k] for k in sorted(parts)}
@property
def partition(self):
all_partitions = self.partitions
return [all_partitions[k] for k in all_partitions]
def __repr__(self, *args, **kwargs):
return f"BlockDevice({self.device})"
def __getitem__(self, key, *args, **kwargs):
if not key in self.info:
raise KeyError(f'{self} does not contain information: "{key}"')
return self.info[key]
class luks2():
def __init__(self, filesystem):
self.filesystem = filesystem
def __enter__(self):
return self
def __exit__(self, *args, **kwargs):
# TODO: https://stackoverflow.com/questions/28157929/how-to-safely-handle-an-exception-inside-a-context-manager
if len(args):
raise args[1]
return True
def encrypt(self, partition, password, key_size=512, hash_type='sha512', iter_time=10000, key_file=None):
if not key_file: key_file = f'/tmp/{os.path.basename(self.filesystem.blockdevice.device)}.disk_pw' #TODO: Make disk-pw-file randomly unique?
if type(password) != bytes: password = bytes(password, 'UTF-8')
with open(key_file, 'wb') as fh:
fh.write(password)
o = b''.join(sys_command(f'/usr/bin/cryptsetup -q -v --type luks2 --pbkdf argon2i --hash {hash_type} --key-size {key_size} --iter-time {iter_time} --key-file {os.path.abspath(key_file)} --use-urandom luksFormat {partition["path"]}'))
if not b'Command successful.' in o:
raise DiskError(f'Could not encrypt volume "{partition["path"]}": {o}')
return key_file
def mount(self, partition, mountpoint, key_file):
"""
Mounts a lukts2 compatible partition to a certain mountpoint.
Keyfile must be specified as there's no way to interact with the pw-prompt atm.
:param mountpoint: The name without absolute path, for instance "luksdev" will point to /dev/mapper/luksdev
:type mountpoint: str
"""
if '/' in mountpoint: os.path.basename(mountpoint) # TODO: Raise exception instead?
sys_command(f'/usr/bin/cryptsetup open {partition["path"]} {mountpoint} --key-file {os.path.abspath(key_file)} --type luks2')
return os.path.islink(f'/dev/mapper/{mountpoint}')
def close(self, mountpoint):
sys_command(f'cryptsetup close /dev/mapper/{mountpoint}')
return os.path.islink(f'/dev/mapper/{mountpoint}') is False
class Filesystem():
# TODO:
# When instance of a HDD is selected, check all usages and gracefully unmount them
# as well as close any crypto handles.
def __init__(self, blockdevice, mode=GPT):
self.blockdevice = blockdevice
self.mode = mode
def __enter__(self, *args, **kwargs):
if self.mode == GPT:
if sys_command(f'/usr/bin/parted -s {self.blockdevice.device} mklabel gpt',).exit_code == 0:
return self
else:
raise DiskError(f'Problem setting the partition format to GPT:', f'/usr/bin/parted -s {self.blockdevice.device} mklabel gpt')
else:
raise DiskError(f'Unknown mode selected to format in: {self.mode}')
def __exit__(self, *args, **kwargs):
b''.join(sys_command(f'sync'))
def raw_parted(self, string:str):
x = sys_command(f'/usr/bin/parted -s {string}')
o = b''.join(x)
return x
def parted(self, string:str):
"""
Performs a parted execution of the given string
:param string: A raw string passed to /usr/bin/parted -s <string>
:type string: str
"""
return self.raw_parted(string).exit_code
def use_entire_disk(self, prep_mode=None):
self.add_partition('primary', start='1MiB', end='513MiB', format='fat32')
self.set_name(0, 'EFI')
self.set(0, 'boot on')
self.set(0, 'esp on') # TODO: Redundant, as in GPT mode it's an alias for "boot on"? https://www.gnu.org/software/parted/manual/html_node/set.html
if prep_mode == 'luks2':
self.add_partition('primary', start='513MiB', end='100%')
else:
self.add_partition('primary', start='1MiB', end='513MiB', format='ext4')
def add_partition(self, type, start, end, format=None):
if format:
return self.parted(f'{self.blockdevice.device} mkpart {type} {format} {start} {end}') == 0
else:
return self.parted(f'{self.blockdevice.device} mkpart {type} {start} {end}') == 0
def set_name(self, partition:int, name:str):
return self.parted(f'{self.blockdevice.device} name {partition+1} "{name}"') == 0
def set(self, partition:int, string:str):
return self.parted(f'{self.blockdevice.device} set {partition+1} {string}') == 0
def device_state(name, *args, **kwargs):
# Based out of: https://askubuntu.com/questions/528690/how-to-get-list-of-all-non-removable-disk-device-names-ssd-hdd-and-sata-ide-onl/528709#528709
if os.path.isfile('/sys/block/{}/device/block/{}/removable'.format(name, name)):
with open('/sys/block/{}/device/block/{}/removable'.format(name, name)) as f:
if f.read(1) == '1':
return
path = ROOT_DIR_PATTERN.sub('', os.readlink('/sys/block/{}'.format(name)))
hotplug_buses = ("usb", "ieee1394", "mmc", "pcmcia", "firewire")
for bus in hotplug_buses:
if os.path.exists('/sys/bus/{}'.format(bus)):
for device_bus in os.listdir('/sys/bus/{}/devices'.format(bus)):
device_link = ROOT_DIR_PATTERN.sub('', os.readlink('/sys/bus/{}/devices/{}'.format(bus, device_bus)))
if re.search(device_link, path):
return
return True
# lsblk --json -l -n -o path
def all_disks(*args, **kwargs):
if not 'partitions' in kwargs: kwargs['partitions'] = False
drives = OrderedDict()
#for drive in json.loads(sys_command(f'losetup --json', *args, **lkwargs, hide_from_log=True)).decode('UTF_8')['loopdevices']:
for drive in json.loads(b''.join(sys_command(f'lsblk --json -l -n -o path,size,type,mountpoint,label,pkname', *args, **kwargs, hide_from_log=True)).decode('UTF_8'))['blockdevices']:
if not kwargs['partitions'] and drive['type'] == 'part': continue
drives[drive['path']] = BlockDevice(drive['path'], drive)
return drives
|