import logging import os import re import textwrap from django.core.exceptions import ObjectDoesNotExist from django.utils.translation import ugettext_lazy as _ from orchestra.contrib.orchestration import ServiceController from orchestra.contrib.resources import ServiceMonitor from . import settings from .models import Address logger = logging.getLogger(__name__) class SieveFilteringMixin(object): def generate_filter(self, mailbox, context): name, content = mailbox.get_filtering() for box in re.findall(r'fileinto\s+"([^"]+)"', content): # create mailboxes if fileinfo is provided witout ':create' option context['box'] = box self.append(textwrap.dedent(""" # Create %(box)s mailbox su %(user)s --shell /bin/bash << 'EOF' mkdir -p "%(maildir)s/.%(box)s" EOF if ( ! grep '%(box)s' %(maildir)s/subscriptions ); then echo '%(box)s' >> %(maildir)s/subscriptions chown %(user)s:%(user)s %(maildir)s/subscriptions fi """) % context ) context['filtering_path'] = settings.MAILBOXES_SIEVE_PATH % context context['filtering_cpath'] = re.sub(r'\.sieve$', '.svbin', context['filtering_path']) if content: context['filtering'] = ('# %(banner)s\n' + content) % context self.append(textwrap.dedent("""\ # Create and compile orchestra sieve filtering su %(user)s --shell /bin/bash << 'EOF' mkdir -p $(dirname "%(filtering_path)s") cat << ' EOF' > %(filtering_path)s %(filtering)s EOF sievec %(filtering_path)s EOF """) % context ) else: self.append("echo '' > %(filtering_path)s" % context) self.append('chown %(user)s:%(group)s %(filtering_path)s' % context) class UNIXUserMaildirBackend(SieveFilteringMixin, ServiceController): """ Assumes that all system users on this servers all mail accounts. If you want to have system users AND mailboxes on the same server you should consider using virtual mailboxes. Supports quota allocation via resources.disk.allocated. """ SHELL = '/dev/null' verbose_name = _("UNIX maildir user") model = 'mailboxes.Mailbox' def save(self, mailbox): context = self.get_context(mailbox) self.append(textwrap.dedent(""" # Update/create %(user)s user state if ( id %(user)s ); then old_password=$(getent shadow %(user)s | cut -d':' -f2) usermod %(user)s \\ --shell %(initial_shell)s \\ --password '%(password)s' if [[ "$old_password" != '%(password)s' ]]; then # Postfix SASL caches passwords RESTART_POSTFIX=1 fi else useradd %(user)s \\ --home %(home)s \\ --password '%(password)s' fi mkdir -p %(home)s chmod 751 %(home)s chown %(user)s:%(group)s %(home)s""") % context ) if hasattr(mailbox, 'resources') and hasattr(mailbox.resources, 'disk'): self.set_quota(mailbox, context) self.generate_filter(mailbox, context) def set_quota(self, mailbox, context): allocated = mailbox.resources.disk.allocated scale = mailbox.resources.disk.resource.get_scale() context['quota'] = allocated * scale #unit_to_bytes(mailbox.resources.disk.unit) self.append(textwrap.dedent(""" # Set Maildir quota for %(user)s su %(user)s --shell /bin/bash << 'EOF' mkdir -p %(maildir)s EOF if [ ! -f %(maildir)s/maildirsize ]; then echo "%(quota)iS" > %(maildir)s/maildirsize chown %(user)s:%(group)s %(maildir)s/maildirsize else sed -i '1s/.*/%(quota)iS/' %(maildir)s/maildirsize fi""") % context ) def delete(self, mailbox): context = self.get_context(mailbox) self.append('mv %(home)s %(home)s.deleted || exit_code=$?' % context) self.append(textwrap.dedent(""" nohup bash -c '{ sleep 2 && killall -u %(user)s -s KILL; }' &> /dev/null & killall -u %(user)s || true # Restart because of Postfix SASL caches credentials userdel %(user)s || true && RESTART_POSTFIX=1 groupdel %(user)s || true""") % context ) def commit(self): self.append('[[ $RESTART_POSTFIX -eq 1 ]] && service postfix restart') super(UNIXUserMaildirBackend, self).commit() def get_context(self, mailbox): context = { 'user': mailbox.name, 'group': mailbox.name, 'name': mailbox.name, 'password': mailbox.password if mailbox.active else '*%s' % mailbox.password, 'home': mailbox.get_home(), 'maildir': os.path.join(mailbox.get_home(), 'Maildir'), 'initial_shell': self.SHELL, 'banner': self.get_banner(), } return context class DovecotPostfixPasswdVirtualUserBackend(SieveFilteringMixin, ServiceController): """ WARNING: This backends is not fully implemented """ DEFAULT_GROUP = 'postfix' verbose_name = _("Dovecot-Postfix virtualuser") model = 'mailboxes.Mailbox' def set_user(self, context): self.append(textwrap.dedent(""" if ( grep '^%(user)s:' %(passwd_path)s ); then sed -i 's#^%(user)s:.*#%(passwd)s#' %(passwd_path)s else echo '%(passwd)s' >> %(passwd_path)s fi""") % context ) self.append("mkdir -p %(home)s" % context) self.append("chown %(uid)s:%(gid)s %(home)s" % context) def set_mailbox(self, context): self.append(textwrap.dedent(""" if ( ! grep '^%(user)s@%(mailbox_domain)s\s' %(virtual_mailbox_maps)s ); then echo "%(user)s@%(mailbox_domain)s\tOK" >> %(virtual_mailbox_maps)s UPDATED_VIRTUAL_MAILBOX_MAPS=1 fi""") % context ) def save(self, mailbox): context = self.get_context(mailbox) self.set_user(context) self.set_mailbox(context) self.generate_filter(mailbox, context) def delete(self, mailbox): context = self.get_context(mailbox) self.append(textwrap.dedent(""" nohup bash -c 'sleep 2 && killall -u %(uid)s -s KILL' &> /dev/null & killall -u %(uid)s || true sed -i '/^%(user)s:.*/d' %(passwd_path)s sed -i '/^%(user)s@%(mailbox_domain)s\s.*/d' %(virtual_mailbox_maps)s UPDATED_VIRTUAL_MAILBOX_MAPS=1""") % context ) if context['deleted_home']: self.append("mv %(home)s %(deleted_home)s || exit_code=$?" % context) else: self.append("rm -fr %(home)s" % context) def get_extra_fields(self, mailbox, context): context['quota'] = self.get_quota(mailbox) return 'userdb_mail=maildir:~/Maildir {quota}'.format(**context) def get_quota(self, mailbox): try: quota = mailbox.resources.disk.allocated except (AttributeError, ObjectDoesNotExist): return '' unit = mailbox.resources.disk.unit[0].upper() return 'userdb_quota_rule=*:bytes=%i%s' % (quota, unit) def commit(self): context = { 'virtual_mailbox_maps': settings.MAILBOXES_VIRTUAL_MAILBOX_MAPS_PATH } self.append(textwrap.dedent(""" [[ $UPDATED_VIRTUAL_MAILBOX_MAPS == 1 ]] && { postmap %(virtual_mailbox_maps)s }""") % context ) def get_context(self, mailbox): context = { 'name': mailbox.name, 'user': mailbox.name, 'password': mailbox.password if mailbox.active else '*%s' % mailbox.password, 'uid': 10000 + mailbox.pk, 'gid': 10000 + mailbox.pk, 'group': self.DEFAULT_GROUP, 'quota': self.get_quota(mailbox), 'passwd_path': settings.MAILBOXES_PASSWD_PATH, 'home': mailbox.get_home(), 'banner': self.get_banner(), 'virtual_mailbox_maps': settings.MAILBOXES_VIRTUAL_MAILBOX_MAPS_PATH, 'mailbox_domain': settings.MAILBOXES_VIRTUAL_MAILBOX_DEFAULT_DOMAIN, } context['extra_fields'] = self.get_extra_fields(mailbox, context) context.update({ 'passwd': '{user}:{password}:{uid}:{gid}::{home}::{extra_fields}'.format(**context), 'deleted_home': settings.MAILBOXES_MOVE_ON_DELETE_PATH % context, }) return context class PostfixAddressVirtualDomainBackend(ServiceController): """ Secondary SMTP server without mailboxes in it, only syncs virtual domains. """ verbose_name = _("Postfix address virtdomain-only") model = 'mailboxes.Address' related_models = ( ('mailboxes.Mailbox', 'addresses'), ) doc_settings = (settings, ('MAILBOXES_LOCAL_DOMAIN', 'MAILBOXES_VIRTUAL_ALIAS_DOMAINS_PATH') ) def is_hosted_domain(self, domain): """ whether or not domain MX points to this server """ return domain.has_default_mx() def include_virtual_alias_domain(self, context): domain = context['domain'] if domain.name != context['local_domain'] and self.is_hosted_domain(domain): self.append(textwrap.dedent(""" # %(domain)s is a virtual domain belonging to this server if ( ! grep '^\s*%(domain)s\s*$' %(virtual_alias_domains)s) ); then echo '%(domain)s' >> %(virtual_alias_domains)s UPDATED_VIRTUAL_ALIAS_DOMAINS=1 fi""") % context ) def is_last_domain(self, domain): return not Address.objects.filter(domain=domain).exists() def exclude_virtual_alias_domain(self, context): domain = context['domain'] if self.is_last_domain(domain): self.append(textwrap.dedent(""" # Delete %(domain)s virtual domain if ( grep '^%(domain)s\s*$' %(virtual_alias_domains)s ); then sed -i '/^%(domain)s\s*/d' %(virtual_alias_domains)s UPDATED_VIRTUAL_ALIAS_DOMAINS=1 fi""") % context ) def save(self, address): context = self.get_context(address) self.include_virtual_alias_domain(context) return context def delete(self, address): context = self.get_context(address) self.exclude_virtual_alias_domain(context) return context def commit(self): context = self.get_context_files() self.append(textwrap.dedent(""" [[ $UPDATED_VIRTUAL_ALIAS_DOMAINS == 1 ]] && { service postfix reload } exit $exit_code """) % context ) def get_context_files(self): return { 'virtual_alias_domains': settings.MAILBOXES_VIRTUAL_ALIAS_DOMAINS_PATH, 'virtual_alias_maps': settings.MAILBOXES_VIRTUAL_ALIAS_MAPS_PATH } def get_context(self, address): context = self.get_context_files() context.update({ 'domain': address.domain, 'email': address.email, 'local_domain': settings.MAILBOXES_LOCAL_DOMAIN, }) return context class PostfixAddressBackend(PostfixAddressVirtualDomainBackend): """ Addresses based on Postfix virtual alias domains, includes PostfixAddressVirtualDomainBackend. """ verbose_name = _("Postfix address") doc_settings = (settings, ( 'MAILBOXES_LOCAL_DOMAIN', 'MAILBOXES_VIRTUAL_ALIAS_DOMAINS_PATH', 'MAILBOXES_VIRTUAL_ALIAS_MAPS_PATH' )) def update_virtual_alias_maps(self, address, context): destination = address.destination if destination: context['destination'] = destination self.append(textwrap.dedent(""" # Set virtual alias entry for %(email)s LINE='%(email)s\t%(destination)s' if ( ! grep '^%(email)s\s' %(virtual_alias_maps)s ); then # Add new line echo "${LINE}" >> %(virtual_alias_maps)s UPDATED_VIRTUAL_ALIAS_MAPS=1 else # Update existing line, if needed if ( ! grep "^${LINE}$" %(virtual_alias_maps)s ); then sed -i "s/^%(email)s\s.*$/${LINE}/" %(virtual_alias_maps)s UPDATED_VIRTUAL_ALIAS_MAPS=1 fi fi""") % context) else: logger.warning("Address %i is empty" % address.pk) self.exclude_virtual_alias_maps(context) # Virtual mailbox stuff # destination = [] # for mailbox in address.get_mailboxes(): # context['mailbox'] = mailbox # destination.append("%(mailbox)s@%(local_domain)s" % context) # for forward in address.forward: # if '@' in forward: # destination.append(forward) def exclude_virtual_alias_maps(self, context): self.append(textwrap.dedent(""" # Remove %(email)s virtual alias entry if ( grep '^%(email)s\s' %(virtual_alias_maps)s ); then sed -i '/^%(email)s\s/d' %(virtual_alias_maps)s UPDATED_VIRTUAL_ALIAS_MAPS=1 fi""") % context ) def save(self, address): context = super(PostfixAddressBackend, self).save(address) self.update_virtual_alias_maps(address, context) def delete(self, address): context = super(PostfixAddressBackend, self).save(address) self.exclude_virtual_alias_maps(context) def commit(self): context = self.get_context_files() self.append(textwrap.dedent(""" # Apply changes if needed [[ $UPDATED_VIRTUAL_ALIAS_DOMAINS == 1 ]] && { service postfix reload } [[ $UPDATED_VIRTUAL_ALIAS_MAPS == 1 ]] && { postmap %(virtual_alias_maps)s } exit $exit_code """) % context ) class AutoresponseBackend(ServiceController): """ WARNING: not implemented """ verbose_name = _("Mail autoresponse") model = 'mailboxes.Autoresponse' class DovecotMaildirDisk(ServiceMonitor): """ Maildir disk usage based on Dovecot maildirsize file http://wiki2.dovecot.org/Quota/Maildir """ model = 'mailboxes.Mailbox' resource = ServiceMonitor.DISK verbose_name = _("Dovecot Maildir size") delete_old_equal_values = True doc_settings = (settings, ('MAILBOXES_MAILDIRSIZE_PATH',) ) def prepare(self): super(DovecotMaildirDisk, self).prepare() current_date = self.current_date.strftime("%Y-%m-%d %H:%M:%S %Z") self.append(textwrap.dedent("""\ function monitor () { awk 'BEGIN { size = 0 } NR > 1 { size += $1 } END { print size }' $1 || echo 0 }""")) def monitor(self, mailbox): context = self.get_context(mailbox) self.append("echo %(object_id)s $(monitor %(maildir_path)s)" % context) def get_context(self, mailbox): context = { 'home': mailbox.get_home(), 'object_id': mailbox.pk } context['maildir_path'] = settings.MAILBOXES_MAILDIRSIZE_PATH % context return context class PostfixMailscannerTraffic(ServiceMonitor): """ A high-performance log parser. Reads the mail.log file only once, for all users. """ model = 'mailboxes.Mailbox' resource = ServiceMonitor.TRAFFIC verbose_name = _("Postfix-Mailscanner traffic") script_executable = '/usr/bin/python' monthly_sum_old_values = True doc_settings = (settings, ('MAILBOXES_MAIL_LOG_PATH',) ) def prepare(self): mail_log = settings.MAILBOXES_MAIL_LOG_PATH context = { 'current_date': self.current_date.strftime("%Y-%m-%d %H:%M:%S %Z"), 'mail_logs': str((mail_log, mail_log+'.1')), } self.append(textwrap.dedent("""\ import re import sys from datetime import datetime from dateutil import tz def to_local_timezone(date, tzlocal=tz.tzlocal()): # Converts orchestra's UTC dates to local timezone date = datetime.strptime(date, '%Y-%m-%d %H:%M:%S %Z') date = date.replace(tzinfo=tz.tzutc()) date = date.astimezone(tzlocal) return date maillogs = {mail_logs} end_datetime = to_local_timezone('{current_date}') end_date = int(end_datetime.strftime('%Y%m%d%H%M%S')) months = ('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec') months = dict((m, '%02d' % n) for n, m in enumerate(months, 1)) def inside_period(month, day, time, ini_date): global months global end_datetime # Mar 9 17:13:22 month = months[month] year = end_datetime.year if month == '12' and end_datetime.month == 1: year = year+1 if len(day) == 1: day = '0' + day date = str(year) + month + day date += time.replace(':', '') return ini_date < int(date) < end_date users = {{}} delivers = {{}} reverse = {{}} def prepare(object_id, mailbox, ini_date): global users global delivers global reverse ini_date = to_local_timezone(ini_date) ini_date = int(ini_date.strftime('%Y%m%d%H%M%S')) users[mailbox] = (ini_date, object_id) delivers[mailbox] = set() reverse[mailbox] = set() def monitor(users, delivers, reverse, maillogs): targets = {{}} counter = {{}} user_regex = re.compile(r'\(Authenticated sender: ([^ ]+)\)') for maillog in maillogs: try: with open(maillog, 'r') as maillog: for line in maillog.readlines(): # Only search for Authenticated sendings if '(Authenticated sender: ' in line: username = user_regex.search(line).groups()[0] try: sender = users[username] except KeyError: continue else: month, day, time, __, proc, id = line.split()[:6] if inside_period(month, day, time, sender[0]): # Add new email delivers[id[:-1]] = username # Look for a MailScanner requeue ID elif ' Requeue: ' in line: id, __, req_id = line.split()[6:9] id = id.split('.')[0] try: username = delivers[id] except KeyError: pass else: targets[req_id] = (username, 0) reverse[username].add(req_id) # Look for the mail size and count the number of recipients of each email else: try: month, day, time, __, proc, req_id, __, msize = line.split()[:8] except ValueError: # not interested in this line continue if proc.startswith('postfix/'): req_id = req_id[:-1] if msize.startswith('size='): try: target = targets[req_id] except KeyError: pass else: targets[req_id] = (target[0], int(msize[5:-1])) elif proc.startswith('postfix/smtp'): try: target = targets[req_id] except KeyError: pass else: if inside_period(month, day, time, users[target[0]][0]): try: counter[req_id] += 1 except KeyError: counter[req_id] = 1 except IOError as e: sys.stderr.write(str(e)+'\\n') for username, opts in users.iteritems(): size = 0 for req_id in reverse[username]: size += targets[req_id][1] * counter.get(req_id, 0) print opts[1], size """).format(**context) ) def commit(self): self.append('monitor(users, delivers, reverse, maillogs)') def monitor(self, mailbox): context = self.get_context(mailbox) self.append("prepare(%(object_id)s, '%(mailbox)s', '%(last_date)s')" % context) def get_context(self, mailbox): context = { 'mailbox': mailbox.name, 'object_id': mailbox.pk, 'last_date': self.get_last_date(mailbox.pk).strftime("%Y-%m-%d %H:%M:%S %Z"), } return context