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
|
# vi: ts=4 expandtab
#
# Copyright (C) 2009-2010 Canonical Ltd.
#
# Author: Scott Moser <scott.moser@canonical.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 cloudinit.util as util
import os
import glob
import subprocess
def handle(name,cfg,cloud,log,args):
# remove the static keys from the pristine image
for f in glob.glob("/etc/ssh/ssh_host_*_key*"):
try: os.unlink(f)
except: pass
if cfg.has_key("ssh_keys"):
# if there are keys in cloud-config, use them
key2file = {
"rsa_private" : ("/etc/ssh/ssh_host_rsa_key", 0600),
"rsa_public" : ("/etc/ssh/ssh_host_rsa_key.pub", 0644),
"dsa_private" : ("/etc/ssh/ssh_host_dsa_key", 0600),
"dsa_public" : ("/etc/ssh/ssh_host_dsa_key.pub", 0644)
}
for key,val in cfg["ssh_keys"].items():
if key2file.has_key(key):
util.write_file(key2file[key][0],val,key2file[key][1])
priv2pub = { 'rsa_private':'rsa_public', 'dsa_private':'dsa_public' }
cmd = 'o=$(ssh-keygen -yf "%s") && echo "$o" root@localhost > "%s"'
for priv,pub in priv2pub.iteritems():
if pub in cfg['ssh_keys'] or not priv in cfg['ssh_keys']: continue
pair=(key2file[priv][0], key2file[pub][0])
subprocess.call(('sh', '-xc', cmd % pair))
log.debug("generated %s from %s" % pair)
else:
# if not, generate them
genkeys ='ssh-keygen -f /etc/ssh/ssh_host_rsa_key -t rsa -N ""; '
genkeys+='ssh-keygen -f /etc/ssh/ssh_host_dsa_key -t dsa -N ""; '
subprocess.call(('sh', '-c', "{ %s } </dev/null" % (genkeys)))
try:
user = util.get_cfg_option_str(cfg,'user')
disable_root = util.get_cfg_option_bool(cfg, "disable_root", True)
keys = cloud.get_public_ssh_keys()
if cfg.has_key("ssh_authorized_keys"):
cfgkeys = cfg["ssh_authorized_keys"]
keys.extend(cfgkeys)
apply_credentials(keys,user,disable_root)
except:
log.warn("applying credentials failed!\n")
send_ssh_keys_to_console()
def send_ssh_keys_to_console():
subprocess.call(('/usr/lib/cloud-init/write-ssh-key-fingerprints',))
def apply_credentials(keys, user, disable_root):
keys = set(keys)
if user:
setup_user_keys(keys, user, '')
if disable_root:
key_prefix = 'command="echo \'Please login as the user \\\"%s\\\" rather than the user \\\"root\\\".\';echo;sleep 10" ' % user
else:
key_prefix = ''
setup_user_keys(keys, 'root', key_prefix)
def setup_user_keys(keys, user, key_prefix):
import pwd
saved_umask = os.umask(077)
pwent = pwd.getpwnam(user)
ssh_dir = '%s/.ssh' % pwent.pw_dir
if not os.path.exists(ssh_dir):
os.mkdir(ssh_dir)
os.chown(ssh_dir, pwent.pw_uid, pwent.pw_gid)
authorized_keys = '%s/.ssh/authorized_keys' % pwent.pw_dir
fp = open(authorized_keys, 'a')
fp.write(''.join(['%s%s\n' % (key_prefix, key) for key in keys]))
fp.close()
os.chown(authorized_keys, pwent.pw_uid, pwent.pw_gid)
os.umask(saved_umask)
|
