295 lines
12 KiB
Python
295 lines
12 KiB
Python
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# Copyright 2019, David Wilson
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# !mitogen: minify_safe
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import base64
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import logging
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import optparse
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import re
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import mitogen.core
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import mitogen.parent
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LOG = logging.getLogger(__name__)
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password_incorrect_msg = 'sudo password is incorrect'
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password_required_msg = 'sudo password is required'
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# These are base64-encoded UTF-8 as our existing minifier/module server
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# struggles with Unicode Python source in some (forgotten) circumstances.
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PASSWORD_PROMPTS = [
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'cGFzc3dvcmQ=', # english
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'bG96aW5rYQ==', # sr@latin.po
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'44OR44K544Ov44O844OJ', # ja.po
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'4Kaq4Ka+4Ka44KaT4Kef4Ka+4Kaw4KeN4Kah', # bn.po
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'2YPZhNmF2Kkg2KfZhNiz2LE=', # ar.po
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'cGFzYWhpdHph', # eu.po
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'0L/QsNGA0L7Qu9GM', # uk.po
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'cGFyb29s', # et.po
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'c2FsYXNhbmE=', # fi.po
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'4Kiq4Ki+4Ki44Ki14Kiw4Kih', # pa.po
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'Y29udHJhc2lnbm8=', # ia.po
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'Zm9jYWwgZmFpcmU=', # ga.po
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'16HXodee15Q=', # he.po
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'4Kqq4Kq+4Kq44Kq14Kqw4KuN4Kqh', # gu.po
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'0L/QsNGA0L7Qu9Cw', # bg.po
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'4Kyq4K2N4Kyw4Kys4K2H4Ky2IOCsuOCsmeCtjeCsleCth+CspA==', # or.po
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'4K6V4K6f4K614K+B4K6a4K+N4K6a4K+K4K6y4K+N', # ta.po
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'cGFzc3dvcnQ=', # de.po
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'7JWU7Zi4', # ko.po
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'0LvQvtC30LjQvdC60LA=', # sr.po
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'beG6rXQga2jhuql1', # vi.po
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'c2VuaGE=', # pt_BR.po
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'cGFzc3dvcmQ=', # it.po
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'aGVzbG8=', # cs.po
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'5a+G56K877ya', # zh_TW.po
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'aGVzbG8=', # sk.po
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'4LC44LCC4LCV4LGH4LCk4LCq4LCm4LCu4LGB', # te.po
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'0L/QsNGA0L7Qu9GM', # kk.po
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'aGFzxYJv', # pl.po
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'Y29udHJhc2VueWE=', # ca.po
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'Y29udHJhc2XDsWE=', # es.po
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'4LSF4LSf4LSv4LS+4LSz4LS14LS+4LSV4LWN4LSV4LWN', # ml.po
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'c2VuaGE=', # pt.po
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'5a+G56CB77ya', # zh_CN.po
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'4KSX4KWB4KSq4KWN4KSk4KS24KSs4KWN4KSm', # mr.po
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'bMO2c2Vub3Jk', # sv.po
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'4YOe4YOQ4YOg4YOd4YOa4YOY', # ka.po
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'4KS24KSs4KWN4KSm4KSV4KWC4KSf', # hi.po
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'YWRnYW5nc2tvZGU=', # da.po
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'4La74LeE4LeD4LeK4La04Lav4La6', # si.po
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'cGFzc29yZA==', # nb.po
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'd2FjaHR3b29yZA==', # nl.po
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'4Kaq4Ka+4Ka44KaT4Kef4Ka+4Kaw4KeN4Kah', # bn_IN.po
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'cGFyb2xh', # tr.po
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'4LKX4LOB4LKq4LON4LKk4LKq4LKm', # kn.po
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'c2FuZGk=', # id.po
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'0L/QsNGA0L7Qu9GM', # ru.po
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'amVsc3rDsw==', # hu.po
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'bW90IGRlIHBhc3Nl', # fr.po
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'aXBoYXNpd2VkaQ==', # zu.po
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'4Z6W4Z624Z6A4Z+S4Z6Z4Z6f4Z6Y4Z+S4Z6E4Z624Z6P4Z+LwqDhn5Y=', # km.po
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'4KaX4KeB4Kaq4KeN4Kak4Ka24Kas4KeN4Kam', # as.po
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]
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PASSWORD_PROMPT_RE = re.compile(
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mitogen.core.b('|').join(
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base64.b64decode(s)
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for s in PASSWORD_PROMPTS
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),
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re.I
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)
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SUDO_OPTIONS = [
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#(False, 'bool', '--askpass', '-A')
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#(False, 'str', '--auth-type', '-a')
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#(False, 'bool', '--background', '-b')
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#(False, 'str', '--close-from', '-C')
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#(False, 'str', '--login-class', 'c')
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(True, 'bool', '--preserve-env', '-E'),
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#(False, 'bool', '--edit', '-e')
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#(False, 'str', '--group', '-g')
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(True, 'bool', '--set-home', '-H'),
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#(False, 'str', '--host', '-h')
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(False, 'bool', '--login', '-i'),
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#(False, 'bool', '--remove-timestamp', '-K')
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#(False, 'bool', '--reset-timestamp', '-k')
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#(False, 'bool', '--list', '-l')
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#(False, 'bool', '--preserve-groups', '-P')
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#(False, 'str', '--prompt', '-p')
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# SELinux options. Passed through as-is.
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(False, 'str', '--role', '-r'),
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(False, 'str', '--type', '-t'),
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# These options are supplied by default by Ansible, but are ignored, as
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# sudo always runs under a TTY with Mitogen.
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(True, 'bool', '--stdin', '-S'),
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(True, 'bool', '--non-interactive', '-n'),
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#(False, 'str', '--shell', '-s')
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#(False, 'str', '--other-user', '-U')
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(False, 'str', '--user', '-u'),
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#(False, 'bool', '--version', '-V')
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#(False, 'bool', '--validate', '-v')
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]
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class OptionParser(optparse.OptionParser):
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def help(self):
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self.exit()
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def error(self, msg):
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self.exit(msg=msg)
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def exit(self, status=0, msg=None):
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msg = 'sudo: ' + (msg or 'unsupported option')
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raise mitogen.core.StreamError(msg)
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def make_sudo_parser():
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parser = OptionParser()
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for supported, kind, longopt, shortopt in SUDO_OPTIONS:
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if kind == 'bool':
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parser.add_option(longopt, shortopt, action='store_true')
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else:
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parser.add_option(longopt, shortopt)
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return parser
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def parse_sudo_flags(args):
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parser = make_sudo_parser()
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opts, args = parser.parse_args(args)
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if len(args):
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raise mitogen.core.StreamError('unsupported sudo arguments:'+str(args))
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return opts
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class PasswordError(mitogen.core.StreamError):
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pass
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def option(default, *args):
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for arg in args:
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if arg is not None:
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return arg
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return default
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class Options(mitogen.parent.Options):
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sudo_path = 'sudo'
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username = 'root'
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password = None
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preserve_env = False
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set_home = False
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login = False
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selinux_role = None
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selinux_type = None
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def __init__(self, username=None, sudo_path=None, password=None,
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preserve_env=None, set_home=None, sudo_args=None,
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login=None, selinux_role=None, selinux_type=None, **kwargs):
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super(Options, self).__init__(**kwargs)
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opts = parse_sudo_flags(sudo_args or [])
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self.username = option(self.username, username, opts.user)
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self.sudo_path = option(self.sudo_path, sudo_path)
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if password:
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self.password = mitogen.core.to_text(password)
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self.preserve_env = option(self.preserve_env,
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preserve_env, opts.preserve_env)
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self.set_home = option(self.set_home, set_home, opts.set_home)
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self.login = option(self.login, login, opts.login)
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self.selinux_role = option(self.selinux_role, selinux_role, opts.role)
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self.selinux_type = option(self.selinux_type, selinux_type, opts.type)
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class SetupProtocol(mitogen.parent.RegexProtocol):
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password_sent = False
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def _on_password_prompt(self, line, match):
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LOG.debug('%s: (password prompt): %s',
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self.stream.name, line.decode('utf-8', 'replace'))
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if self.stream.conn.options.password is None:
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self.stream.conn._fail_connection(
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PasswordError(password_required_msg)
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)
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return
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if self.password_sent:
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self.stream.conn._fail_connection(
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PasswordError(password_incorrect_msg)
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)
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return
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self.stream.transmit_side.write(
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(self.stream.conn.options.password + '\n').encode('utf-8')
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)
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self.password_sent = True
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PARTIAL_PATTERNS = [
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(PASSWORD_PROMPT_RE, _on_password_prompt),
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]
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class Connection(mitogen.parent.Connection):
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diag_protocol_class = SetupProtocol
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options_class = Options
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create_child = staticmethod(mitogen.parent.hybrid_tty_create_child)
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create_child_args = {
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'escalates_privilege': True,
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}
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child_is_immediate_subprocess = False
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def _get_name(self):
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return u'sudo.' + mitogen.core.to_text(self.options.username)
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def get_boot_command(self):
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# Note: sudo did not introduce long-format option processing until July
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# 2013, so even though we parse long-format options, supply short-form
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# to the sudo command.
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boot_cmd = super(Connection, self).get_boot_command()
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bits = [self.options.sudo_path, '-u', self.options.username]
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if self.options.preserve_env:
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bits += ['-E']
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if self.options.set_home:
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bits += ['-H']
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if self.options.login:
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bits += ['-i']
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if self.options.selinux_role:
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bits += ['-r', self.options.selinux_role]
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if self.options.selinux_type:
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bits += ['-t', self.options.selinux_type]
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# special handling for bash builtins
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# TODO: more efficient way of doing this, at least
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# it's only 1 iteration of boot_cmd to go through
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source_found = False
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for cmd in boot_cmd[:]:
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# rip `source` from boot_cmd if it exists; sudo.py can't run this
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# even with -i or -s options
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# since we've already got our ssh command working we shouldn't
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# need to source anymore
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# couldn't figure out how to get this to work using sudo flags
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if 'source' == cmd:
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boot_cmd.remove(cmd)
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source_found = True
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continue
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if source_found:
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# remove words until we hit the python interpreter call
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if not cmd.endswith('python'):
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boot_cmd.remove(cmd)
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else:
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break
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return bits + ['--'] + boot_cmd
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