114 lines
4.3 KiB
Python
114 lines
4.3 KiB
Python
|
# Copyright 2019, David Wilson
|
||
|
|
#
|
||
|
|
# Redistribution and use in source and binary forms, with or without
|
||
|
|
# modification, are permitted provided that the following conditions are met:
|
||
|
|
#
|
||
|
|
# 1. Redistributions of source code must retain the above copyright notice,
|
||
|
|
# this list of conditions and the following disclaimer.
|
||
|
|
#
|
||
|
|
# 2. Redistributions in binary form must reproduce the above copyright notice,
|
||
|
|
# this list of conditions and the following disclaimer in the documentation
|
||
|
|
# and/or other materials provided with the distribution.
|
||
|
|
#
|
||
|
|
# 3. Neither the name of the copyright holder nor the names of its contributors
|
||
|
|
# may be used to endorse or promote products derived from this software without
|
||
|
|
# specific prior written permission.
|
||
|
|
#
|
||
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||
|
|
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||
|
|
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
# POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
# !mitogen: minify_safe
|
||
|
|
|
||
|
|
import logging
|
||
|
|
|
||
|
|
import mitogen.core
|
||
|
|
import mitogen.parent
|
||
|
|
from mitogen.core import b
|
||
|
|
|
||
|
|
|
||
|
|
LOG = logging.getLogger(__name__)
|
||
|
|
|
||
|
|
|
||
|
|
class PasswordError(mitogen.core.StreamError):
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
class Stream(mitogen.parent.Stream):
|
||
|
|
create_child = staticmethod(mitogen.parent.hybrid_tty_create_child)
|
||
|
|
child_is_immediate_subprocess = False
|
||
|
|
|
||
|
|
username = 'root'
|
||
|
|
password = None
|
||
|
|
doas_path = 'doas'
|
||
|
|
password_prompt = b('Password:')
|
||
|
|
incorrect_prompts = (
|
||
|
|
b('doas: authentication failed'),
|
||
|
|
)
|
||
|
|
|
||
|
|
def construct(self, username=None, password=None, doas_path=None,
|
||
|
|
password_prompt=None, incorrect_prompts=None, **kwargs):
|
||
|
|
super(Stream, self).construct(**kwargs)
|
||
|
|
if username is not None:
|
||
|
|
self.username = username
|
||
|
|
if password is not None:
|
||
|
|
self.password = password
|
||
|
|
if doas_path is not None:
|
||
|
|
self.doas_path = doas_path
|
||
|
|
if password_prompt is not None:
|
||
|
|
self.password_prompt = password_prompt.lower()
|
||
|
|
if incorrect_prompts is not None:
|
||
|
|
self.incorrect_prompts = map(str.lower, incorrect_prompts)
|
||
|
|
|
||
|
|
def _get_name(self):
|
||
|
|
return u'doas.' + mitogen.core.to_text(self.username)
|
||
|
|
|
||
|
|
def get_boot_command(self):
|
||
|
|
bits = [self.doas_path, '-u', self.username, '--']
|
||
|
|
bits = bits + super(Stream, self).get_boot_command()
|
||
|
|
LOG.debug('doas command line: %r', bits)
|
||
|
|
return bits
|
||
|
|
|
||
|
|
password_incorrect_msg = 'doas password is incorrect'
|
||
|
|
password_required_msg = 'doas password is required'
|
||
|
|
|
||
|
|
def _connect_input_loop(self, it):
|
||
|
|
password_sent = False
|
||
|
|
for buf in it:
|
||
|
|
LOG.debug('%r: received %r', self, buf)
|
||
|
|
if buf.endswith(self.EC0_MARKER):
|
||
|
|
self._ec0_received()
|
||
|
|
return
|
||
|
|
if any(s in buf.lower() for s in self.incorrect_prompts):
|
||
|
|
if password_sent:
|
||
|
|
raise PasswordError(self.password_incorrect_msg)
|
||
|
|
elif self.password_prompt in buf.lower():
|
||
|
|
if self.password is None:
|
||
|
|
raise PasswordError(self.password_required_msg)
|
||
|
|
if password_sent:
|
||
|
|
raise PasswordError(self.password_incorrect_msg)
|
||
|
|
LOG.debug('sending password')
|
||
|
|
self.diag_stream.transmit_side.write(
|
||
|
|
mitogen.core.to_text(self.password + '\n').encode('utf-8')
|
||
|
|
)
|
||
|
|
password_sent = True
|
||
|
|
raise mitogen.core.StreamError('bootstrap failed')
|
||
|
|
|
||
|
|
def _connect_bootstrap(self):
|
||
|
|
it = mitogen.parent.iter_read(
|
||
|
|
fds=[self.receive_side.fd, self.diag_stream.receive_side.fd],
|
||
|
|
deadline=self.connect_deadline,
|
||
|
|
)
|
||
|
|
try:
|
||
|
|
self._connect_input_loop(it)
|
||
|
|
finally:
|
||
|
|
it.close()
|