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#! /usr/bin/python2
#
# Copyright (C) 2001-2008 by the Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.

"""Change a list's password.

Prior to Mailman 2.1, list passwords were kept in crypt'd format -- usually.
Some Python installations didn't have the crypt module available, so they'd
fall back to md5.  Then suddenly the Python installation might grow a crypt
module and all list passwords would be broken.

In Mailman 2.1, all list and site passwords are stored in SHA1 hexdigest
form.  This breaks list passwords for all existing pre-Mailman 2.1 lists, and
since those passwords aren't stored anywhere in plain text, they cannot be
retrieved and updated.

Thus, this script generates new passwords for a list, and optionally sends it
to all the owners of the list.

Usage: change_pw [options]

Options:

    --all / -a
        Change the password for all lists.

    --domain=domain
    -d domain
        Change the password for all lists in the virtual domain `domain'.  It
        is okay to give multiple -d options.

    --listname=listname
    -l listname
        Change the password only for the named list.  It is okay to give
        multiple -l options.

    --password=newpassword
    -p newpassword
        Use the supplied plain text password `newpassword' as the new password
        for any lists that are being changed (as specified by the -a, -d, and
        -l options).  If not given, lists will be assigned a randomly
        generated new password.

    --quiet / -q
        Don't notify list owners of the new password.  You'll have to have
        some other way of letting the list owners know the new password
        (presumably out-of-band).

    --help / -h
        Print this help message and exit.
"""

import sys
import getopt

import paths
from Mailman import mm_cfg
from Mailman import Utils
from Mailman import MailList
from Mailman import Errors
from Mailman import Message
from Mailman import i18n

_ = i18n._
C_ = i18n.C_

SPACE = ' '



def usage(code, msg=''):
    if code:
        fd = sys.stderr
    else:
        fd = sys.stdout
    print >> fd, C_(__doc__)
    if msg:
        print >> fd, msg
    sys.exit(code)



_listcache = {}

def openlist(listname):
    missing = []
    mlist = _listcache.get(listname, missing)
    if mlist is missing:
        try:
            mlist = MailList.MailList(listname, lock=0)
        except Errors.MMListError, e:
            usage(1, C_('No such list "%(listname)s"\n%(e)s'))
        _listcache[listname] = mlist
    return mlist



def main():
    # Parse options
    try:
        opts, args = getopt.getopt(
            sys.argv[1:], 'ad:l:p:qh',
            ['all', 'domain=', 'listname=', 'password=', 'quiet', 'help'])
    except getopt.error, msg:
        usage(1, msg)

    # defaults
    listnames = {}
    domains = {}
    password = None
    quiet = 0

    for opt, arg in opts:
        if opt in ('-h', '--help'):
            usage(0)
        elif opt in ('-a', '--all'):
            for name in Utils.list_names():
                listnames[name] = 1
        elif opt in ('-d', '--domain'):
            domains[arg] = 1
        elif opt in ('-l', '--listname'):
            listnames[arg.lower()] = 1
        elif opt in ('-p', '--password'):
            password = arg
        elif opt in ('-q', '--quiet'):
            quiet = 1

    if args:
        strargs = SPACE.join(args)
        usage(1, _('Bad arguments: %(strargs)s'))

    if password is not None:
        if not password:
            usage(1, _('Empty list passwords are not allowed'))
        shapassword = Utils.sha_new(password).hexdigest()

    if domains:
        for name in Utils.list_names():
            mlist = openlist(name)
            if domains.has_key(mlist.host_name):
                listnames[name] = 1

    if not listnames:
        print >> sys.stderr, C_('Nothing to do.')
        sys.exit(0)

    # Set the password on the lists
    for listname in listnames.keys():
        mlist = openlist(listname)
        mlist.Lock()
        try:
            if password is None:
                randompw = Utils.MakeRandomPassword(
                    mm_cfg.ADMIN_PASSWORD_LENGTH)
                shapassword = Utils.sha_new(randompw).hexdigest()
                notifypassword = randompw
            else:
                notifypassword = password

            mlist.password = shapassword
            mlist.Save()
        finally:
            mlist.Unlock()

        # Notification
        print C_('New %(listname)s password: %(notifypassword)s')
        if not quiet:
            otrans = i18n.get_translation()
            i18n.set_language(mlist.preferred_language)
            try:
                hostname = mlist.host_name
                adminurl = mlist.GetScriptURL('admin', absolute=1)
                msg = Message.UserNotification(
                    mlist.owner[:], Utils.get_site_email(),
                    C_('Your new %(listname)s list password'),
                    C_('''\
The site administrator at %(hostname)s has changed the password for your
mailing list %(listname)s.  It is now

    %(notifypassword)s

Please be sure to use this for all future list administration.  You may want
to log in now to your list and change the password to something more to your
liking.  Visit your list admin page at

    %(adminurl)s
'''),
                    mlist.preferred_language)
            finally:
                i18n.set_translation(otrans)
            msg.send(mlist)



if __name__ == '__main__':
    main()