aa2e55809a
Garret's patch cloud-init-0.6.2-sshsvc.patch did 2 separate things. This hunk makes deletion of keys configurable, and then makes generation of the keys only done if the key does not exist. TODO: document ssh_genkeytypes. taken from git://pkgs.fedoraproject.org/cloud-init.git commit 87f33190f43d2b26cced4597e7298835024466c2 Author: Garrett Holmstrom <gholms@fedoraproject.org> Patch11: cloud-init-0.6.2-sshsvc.patch
102 lines
3.8 KiB
Python
102 lines
3.8 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2009-2010 Canonical Ltd.
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#
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# Author: Scott Moser <scott.moser@canonical.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import cloudinit.util as util
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import cloudinit.SshUtil as sshutil
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import os
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import glob
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import subprocess
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DISABLE_ROOT_OPTS="no-port-forwarding,no-agent-forwarding,no-X11-forwarding,command=\"echo \'Please login as the user \\\"$USER\\\" rather than the user \\\"root\\\".\';echo;sleep 10\""
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global_log = None
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def handle(name,cfg,cloud,log,args):
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global global_log
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global_log = log
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# remove the static keys from the pristine image
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if cfg.get("ssh_deletekeys", True):
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for f in glob.glob("/etc/ssh/ssh_host_*key*"):
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try: os.unlink(f)
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except: pass
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if cfg.has_key("ssh_keys"):
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# if there are keys in cloud-config, use them
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key2file = {
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"rsa_private" : ("/etc/ssh/ssh_host_rsa_key", 0600),
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"rsa_public" : ("/etc/ssh/ssh_host_rsa_key.pub", 0644),
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"dsa_private" : ("/etc/ssh/ssh_host_dsa_key", 0600),
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"dsa_public" : ("/etc/ssh/ssh_host_dsa_key.pub", 0644),
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"ecdsa_private" : ("/etc/ssh/ssh_host_ecdsa_key", 0600),
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"ecdsa_public" : ("/etc/ssh/ssh_host_ecdsa_key.pub", 0644),
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}
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for key,val in cfg["ssh_keys"].items():
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if key2file.has_key(key):
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util.write_file(key2file[key][0],val,key2file[key][1])
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priv2pub = { 'rsa_private':'rsa_public', 'dsa_private':'dsa_public',
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'ecdsa_private': 'ecdsa_public', }
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cmd = 'o=$(ssh-keygen -yf "%s") && echo "$o" root@localhost > "%s"'
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for priv,pub in priv2pub.iteritems():
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if pub in cfg['ssh_keys'] or not priv in cfg['ssh_keys']: continue
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pair=(key2file[priv][0], key2file[pub][0])
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subprocess.call(('sh', '-xc', cmd % pair))
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log.debug("generated %s from %s" % pair)
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else:
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# if not, generate them
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for keytype in util.get_cfg_option_list_or_str(cfg, 'ssh_genkeytypes',
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['rsa', 'dsa', 'ecdsa']):
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keyfile = '/etc/ssh/ssh_host_%s_key' % keytype
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if not os.path.exists(keyfile):
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subprocess.call(['ssh-keygen', '-t', keytype, '-N', '',
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'-f', keyfile])
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util.restorecon_if_possible('/etc/ssh', recursive=True)
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try:
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user = util.get_cfg_option_str(cfg,'user')
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disable_root = util.get_cfg_option_bool(cfg, "disable_root", True)
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disable_root_opts = util.get_cfg_option_str(cfg, "disable_root_opts",
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DISABLE_ROOT_OPTS)
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keys = cloud.get_public_ssh_keys()
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if cfg.has_key("ssh_authorized_keys"):
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cfgkeys = cfg["ssh_authorized_keys"]
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keys.extend(cfgkeys)
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apply_credentials(keys,user,disable_root, disable_root_opts)
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except:
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util.logexc(log)
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log.warn("applying credentials failed!\n")
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def apply_credentials(keys, user, disable_root, disable_root_opts=DISABLE_ROOT_OPTS, log=global_log):
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keys = set(keys)
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if user:
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sshutil.setup_user_keys(keys, user, '', log)
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if disable_root:
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key_prefix = disable_root_opts.replace('$USER', user)
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else:
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key_prefix = ''
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sshutil.setup_user_keys(keys, 'root', key_prefix, log)
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