# 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 base64 import logging import optparse import re import mitogen.core import mitogen.parent from mitogen.core import b LOG = logging.getLogger(__name__) # These are base64-encoded UTF-8 as our existing minifier/module server # struggles with Unicode Python source in some (forgotten) circumstances. PASSWORD_PROMPTS = [ 'cGFzc3dvcmQ=', # english 'bG96aW5rYQ==', # sr@latin.po '44OR44K544Ov44O844OJ', # ja.po '4Kaq4Ka+4Ka44KaT4Kef4Ka+4Kaw4KeN4Kah', # bn.po '2YPZhNmF2Kkg2KfZhNiz2LE=', # ar.po 'cGFzYWhpdHph', # eu.po '0L/QsNGA0L7Qu9GM', # uk.po 'cGFyb29s', # et.po 'c2FsYXNhbmE=', # fi.po '4Kiq4Ki+4Ki44Ki14Kiw4Kih', # pa.po 'Y29udHJhc2lnbm8=', # ia.po 'Zm9jYWwgZmFpcmU=', # ga.po '16HXodee15Q=', # he.po '4Kqq4Kq+4Kq44Kq14Kqw4KuN4Kqh', # gu.po '0L/QsNGA0L7Qu9Cw', # bg.po '4Kyq4K2N4Kyw4Kys4K2H4Ky2IOCsuOCsmeCtjeCsleCth+CspA==', # or.po '4K6V4K6f4K614K+B4K6a4K+N4K6a4K+K4K6y4K+N', # ta.po 'cGFzc3dvcnQ=', # de.po '7JWU7Zi4', # ko.po '0LvQvtC30LjQvdC60LA=', # sr.po 'beG6rXQga2jhuql1', # vi.po 'c2VuaGE=', # pt_BR.po 'cGFzc3dvcmQ=', # it.po 'aGVzbG8=', # cs.po '5a+G56K877ya', # zh_TW.po 'aGVzbG8=', # sk.po '4LC44LCC4LCV4LGH4LCk4LCq4LCm4LCu4LGB', # te.po '0L/QsNGA0L7Qu9GM', # kk.po 'aGFzxYJv', # pl.po 'Y29udHJhc2VueWE=', # ca.po 'Y29udHJhc2XDsWE=', # es.po '4LSF4LSf4LSv4LS+4LSz4LS14LS+4LSV4LWN4LSV4LWN', # ml.po 'c2VuaGE=', # pt.po '5a+G56CB77ya', # zh_CN.po '4KSX4KWB4KSq4KWN4KSk4KS24KSs4KWN4KSm', # mr.po 'bMO2c2Vub3Jk', # sv.po '4YOe4YOQ4YOg4YOd4YOa4YOY', # ka.po '4KS24KSs4KWN4KSm4KSV4KWC4KSf', # hi.po 'YWRnYW5nc2tvZGU=', # da.po '4La74LeE4LeD4LeK4La04Lav4La6', # si.po 'cGFzc29yZA==', # nb.po 'd2FjaHR3b29yZA==', # nl.po '4Kaq4Ka+4Ka44KaT4Kef4Ka+4Kaw4KeN4Kah', # bn_IN.po 'cGFyb2xh', # tr.po '4LKX4LOB4LKq4LON4LKk4LKq4LKm', # kn.po 'c2FuZGk=', # id.po '0L/QsNGA0L7Qu9GM', # ru.po 'amVsc3rDsw==', # hu.po 'bW90IGRlIHBhc3Nl', # fr.po 'aXBoYXNpd2VkaQ==', # zu.po '4Z6W4Z624Z6A4Z+S4Z6Z4Z6f4Z6Y4Z+S4Z6E4Z624Z6P4Z+LwqDhn5Y=', # km.po '4KaX4KeB4Kaq4KeN4Kak4Ka24Kas4KeN4Kam', # as.po ] PASSWORD_PROMPT_RE = re.compile( u'|'.join( base64.b64decode(s).decode('utf-8') for s in PASSWORD_PROMPTS ) ) PASSWORD_PROMPT = b('password') SUDO_OPTIONS = [ #(False, 'bool', '--askpass', '-A') #(False, 'str', '--auth-type', '-a') #(False, 'bool', '--background', '-b') #(False, 'str', '--close-from', '-C') #(False, 'str', '--login-class', 'c') (True, 'bool', '--preserve-env', '-E'), #(False, 'bool', '--edit', '-e') #(False, 'str', '--group', '-g') (True, 'bool', '--set-home', '-H'), #(False, 'str', '--host', '-h') (False, 'bool', '--login', '-i'), #(False, 'bool', '--remove-timestamp', '-K') #(False, 'bool', '--reset-timestamp', '-k') #(False, 'bool', '--list', '-l') #(False, 'bool', '--preserve-groups', '-P') #(False, 'str', '--prompt', '-p') # SELinux options. Passed through as-is. (False, 'str', '--role', '-r'), (False, 'str', '--type', '-t'), # These options are supplied by default by Ansible, but are ignored, as # sudo always runs under a TTY with Mitogen. (True, 'bool', '--stdin', '-S'), (True, 'bool', '--non-interactive', '-n'), #(False, 'str', '--shell', '-s') #(False, 'str', '--other-user', '-U') (False, 'str', '--user', '-u'), #(False, 'bool', '--version', '-V') #(False, 'bool', '--validate', '-v') ] class OptionParser(optparse.OptionParser): def help(self): self.exit() def error(self, msg): self.exit(msg=msg) def exit(self, status=0, msg=None): msg = 'sudo: ' + (msg or 'unsupported option') raise mitogen.core.StreamError(msg) def make_sudo_parser(): parser = OptionParser() for supported, kind, longopt, shortopt in SUDO_OPTIONS: if kind == 'bool': parser.add_option(longopt, shortopt, action='store_true') else: parser.add_option(longopt, shortopt) return parser def parse_sudo_flags(args): parser = make_sudo_parser() opts, args = parser.parse_args(args) if len(args): raise mitogen.core.StreamError('unsupported sudo arguments:'+str(args)) return opts class PasswordError(mitogen.core.StreamError): pass def option(default, *args): for arg in args: if arg is not None: return arg return default class Stream(mitogen.parent.Stream): create_child = staticmethod(mitogen.parent.hybrid_tty_create_child) child_is_immediate_subprocess = False sudo_path = 'sudo' username = 'root' password = None preserve_env = False set_home = False login = False selinux_role = None selinux_type = None def construct(self, username=None, sudo_path=None, password=None, preserve_env=None, set_home=None, sudo_args=None, login=None, selinux_role=None, selinux_type=None, **kwargs): super(Stream, self).construct(**kwargs) opts = parse_sudo_flags(sudo_args or []) self.username = option(self.username, username, opts.user) self.sudo_path = option(self.sudo_path, sudo_path) self.password = password or None self.preserve_env = option(self.preserve_env, preserve_env, opts.preserve_env) self.set_home = option(self.set_home, set_home, opts.set_home) self.login = option(self.login, login, opts.login) self.selinux_role = option(self.selinux_role, selinux_role, opts.role) self.selinux_type = option(self.selinux_type, selinux_type, opts.type) def _get_name(self): return u'sudo.' + mitogen.core.to_text(self.username) def get_boot_command(self): # Note: sudo did not introduce long-format option processing until July # 2013, so even though we parse long-format options, supply short-form # to the sudo command. bits = [self.sudo_path, '-u', self.username] if self.preserve_env: bits += ['-E'] if self.set_home: bits += ['-H'] if self.login: bits += ['-i'] if self.selinux_role: bits += ['-r', self.selinux_role] if self.selinux_type: bits += ['-t', self.selinux_type] bits = bits + ['--'] + super(Stream, self).get_boot_command() LOG.debug('sudo command line: %r', bits) return bits password_incorrect_msg = 'sudo password is incorrect' password_required_msg = 'sudo password is required' def _connect_input_loop(self, it): password_sent = False for buf in it: LOG.debug('%s: received %r', self.name, buf) if buf.endswith(self.EC0_MARKER): self._ec0_received() return match = PASSWORD_PROMPT_RE.search(buf.decode('utf-8').lower()) if match is not None: LOG.debug('%s: matched password prompt %r', self.name, match.group(0)) if self.password is None: raise PasswordError(self.password_required_msg) if password_sent: raise PasswordError(self.password_incorrect_msg) 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): fds = [self.receive_side.fd] if self.diag_stream is not None: fds.append(self.diag_stream.receive_side.fd) it = mitogen.parent.iter_read( fds=fds, deadline=self.connect_deadline, ) try: self._connect_input_loop(it) finally: it.close()