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
|
# vi: ts=4 expandtab
#
# Copyright (C) 2013 Yahoo! Inc.
#
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# 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/>.
import base64
from StringIO import StringIO
from cloudinit.settings import PER_INSTANCE
from cloudinit import util
frequency = PER_INSTANCE
def _decode(data, encoding=None):
if not data:
return ''
if not encoding or encoding.lower() in ['raw']:
return data
elif encoding.lower() in ['base64', 'b64']:
return base64.b64decode(data)
elif encoding.lower() in ['gzip', 'gz']:
return util.decomp_gzip(data, quiet=False)
else:
raise IOError("Unknown random_seed encoding: %s" % (encoding))
def handle(name, cfg, cloud, log, _args):
if not cfg or "random_seed" not in cfg:
log.debug(("Skipping module named %s, "
"no 'random_seed' configuration found"), name)
return
my_cfg = cfg['random_seed']
seed_path = my_cfg.get('file', '/dev/urandom')
seed_buf = StringIO()
seed_buf.write(_decode(my_cfg.get('data', ''),
encoding=my_cfg.get('encoding')))
metadata = cloud.datasource.metadata
if metadata and 'random_seed' in metadata:
seed_buf.write(metadata['random_seed'])
seed_data = seed_buf.getvalue()
if len(seed_data):
log.debug("%s: adding %s bytes of random seed entrophy to %s", name,
len(seed_data), seed_path)
util.append_file(seed_path, seed_data)
|
