hgext/factotum.py
author Martin von Zweigbergk <martinvonz@google.com>
Fri, 11 Feb 2022 22:39:53 -0800
changeset 48783 218154867575
parent 45942 89a2afe31e82
child 48875 6000f5b25c9b
permissions -rw-r--r--
filemerge: remove an unnecessary join with absolute path The `backup` path is now always absolute, so we don't need to join it with the working copy path. Differential Revision: https://phab.mercurial-scm.org/D12188
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# factotum.py - Plan 9 factotum integration for Mercurial
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#
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# Copyright (C) 2012 Steven Stallion <sstallion@gmail.com>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
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# 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 along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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'''http authentication with factotum
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This extension allows the factotum(4) facility on Plan 9 from Bell Labs
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platforms to provide authentication information for HTTP access. Configuration
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entries specified in the auth section as well as authentication information
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provided in the repository URL are fully supported. If no prefix is specified,
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a value of "*" will be assumed.
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By default, keys are specified as::
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  proto=pass service=hg prefix=<prefix> user=<username> !password=<password>
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If the factotum extension is unable to read the required key, one will be
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requested interactively.
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A configuration section is available to customize runtime behavior. By
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default, these entries are::
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  [factotum]
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  executable = /bin/auth/factotum
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  mountpoint = /mnt/factotum
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  service = hg
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The executable entry defines the full path to the factotum binary. The
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mountpoint entry defines the path to the factotum file service. Lastly, the
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service entry controls the service name used when reading keys.
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'''
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from __future__ import absolute_import
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import os
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from mercurial.i18n import _
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from mercurial.pycompat import setattr
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from mercurial.utils import procutil
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from mercurial import (
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    error,
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    httpconnection,
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    registrar,
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    url,
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    util,
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)
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urlreq = util.urlreq
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passwordmgr = url.passwordmgr
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ERRMAX = 128
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_executable = _mountpoint = _service = None
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configtable = {}
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configitem = registrar.configitem(configtable)
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configitem(
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    b'factotum',
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    b'executable',
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    default=b'/bin/auth/factotum',
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)
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configitem(
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    b'factotum',
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    b'mountpoint',
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    default=b'/mnt/factotum',
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)
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configitem(
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    b'factotum',
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    b'service',
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    default=b'hg',
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)
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def auth_getkey(self, params):
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    if not self.ui.interactive():
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        raise error.Abort(_(b'factotum not interactive'))
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    if b'user=' not in params:
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        params = b'%s user?' % params
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    params = b'%s !password?' % params
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    os.system(procutil.tonativestr(b"%s -g '%s'" % (_executable, params)))
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def auth_getuserpasswd(self, getkey, params):
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    params = b'proto=pass %s' % params
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    while True:
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        fd = os.open(b'%s/rpc' % _mountpoint, os.O_RDWR)
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        try:
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            os.write(fd, b'start %s' % params)
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            l = os.read(fd, ERRMAX).split()
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            if l[0] == b'ok':
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                os.write(fd, b'read')
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                status, user, passwd = os.read(fd, ERRMAX).split(None, 2)
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                if status == b'ok':
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                    if passwd.startswith(b"'"):
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                        if passwd.endswith(b"'"):
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                            passwd = passwd[1:-1].replace(b"''", b"'")
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                        else:
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                            raise error.Abort(_(b'malformed password string'))
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                    return (user, passwd)
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        except (OSError, IOError):
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            raise error.Abort(_(b'factotum not responding'))
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        finally:
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            os.close(fd)
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        getkey(self, params)
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def monkeypatch_method(cls):
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    def decorator(func):
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        setattr(cls, func.__name__, func)
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        return func
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    return decorator
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@monkeypatch_method(passwordmgr)
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def find_user_password(self, realm, authuri):
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    user, passwd = self.passwddb.find_user_password(realm, authuri)
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    if user and passwd:
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        self._writedebug(user, passwd)
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        return (user, passwd)
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    prefix = b''
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    res = httpconnection.readauthforuri(self.ui, authuri, user)
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    if res:
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        _, auth = res
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        prefix = auth.get(b'prefix')
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        user, passwd = auth.get(b'username'), auth.get(b'password')
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    if not user or not passwd:
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        if not prefix:
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            prefix = realm.split(b' ')[0].lower()
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        params = b'service=%s prefix=%s' % (_service, prefix)
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        if user:
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            params = b'%s user=%s' % (params, user)
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        user, passwd = auth_getuserpasswd(self, auth_getkey, params)
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    self.add_password(realm, authuri, user, passwd)
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    self._writedebug(user, passwd)
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    return (user, passwd)
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def uisetup(ui):
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    global _executable
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    _executable = ui.config(b'factotum', b'executable')
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    global _mountpoint
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    _mountpoint = ui.config(b'factotum', b'mountpoint')
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    global _service
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    _service = ui.config(b'factotum', b'service')