153 lines
5.9 KiB
Python
153 lines
5.9 KiB
Python
#!/usr/bin/python
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#
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# gpg-mailgate
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#
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# This file is part of the gpg-mailgate source code.
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#
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# gpg-mailgate is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# gpg-mailgate source code is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General 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
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# along with gpg-mailgate source code. If not, see <http://www.gnu.org/licenses/>.
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#
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from configparser import RawConfigParser
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import GnuPG
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import sqlalchemy
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from sqlalchemy.sql import select, delete, update, and_
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import smtplib
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import markdown
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import syslog
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import os
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from email.mime.text import MIMEText
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from email.mime.multipart import MIMEMultipart
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import logging
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import lacre
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import lacre.config as conf
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def load_file(name):
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f = open(name)
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data = f.read()
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f.close()
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return data
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def authenticate_maybe(smtp):
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if conf.config_item_equals('smtp', 'enabled', 'true'):
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LOG.debug(f"Connecting to {conf.get_item('smtp', 'host')}:{conf.get_item('smtp', 'port')}")
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smtp.connect(conf.get_item('smtp', 'host'), conf.get_item('smtp', 'port'))
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smtp.ehlo()
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if conf.config_item_equals('smtp', 'starttls', 'true'):
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LOG.debug("StartTLS enabled")
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smtp.starttls()
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smtp.ehlo()
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smtp.login(conf.get_item('smtp', 'username'), conf.get_item('smtp', 'password'))
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def send_msg( mailsubject, messagefile, recipients = None ):
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mailbody = load_file( conf.get_item('cron', 'mail_templates') + "/" + messagefile).read()
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msg = MIMEMultipart("alternative")
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msg["From"] = conf.get_item('cron', 'notification_email')
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msg["To"] = recipients
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msg["Subject"] = mailsubject
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msg.attach(MIMEText(mailbody, 'plain'))
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msg.attach(MIMEText(markdown.markdown(mailbody), 'html'))
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if conf.config_item_set('relay', 'host') and conf.config_item_set('relay', 'enc_port'):
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relay = (conf.get_item('relay', 'host'), int(conf.get_item('relay', 'enc_port')))
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smtp = smtplib.SMTP(relay[0], relay[1])
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authenticate_maybe(smtp)
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smtp.sendmail( conf.get_item('cron', 'notification_email'), recipients, msg.as_string() )
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else:
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LOG.info("Could not send mail due to wrong configuration")
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def setup_db_connection(url):
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engine = sqlalchemy.create_engine(url)
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return (engine, engine.connect())
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def define_db_schema():
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meta = sqlalchemy.MetaData()
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gpgmw_keys = sqlalchemy.Table('gpgmw_keys', meta,
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sqlalchemy.Column('id', sqlalchemy.Integer, primary_key=True),
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sqlalchemy.Column('email', sqlalchemy.String(256)),
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sqlalchemy.Column('publickey', sqlalchemy.Text),
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sqlalchemy.Column('confirm', sqlalchemy.String(32)),
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sqlalchemy.Column('status', sqlalchemy.Integer),
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sqlalchemy.Column('time', sqlalchemy.DateTime))
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return (gpgmw_keys)
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# Read configuration from /etc/gpg-mailgate.conf
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conf.load_config()
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lacre.init_logging(conf.get_item('logging', 'config'))
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LOG = logging.getLogger(__name__)
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if conf.config_item_equals('database', 'enabled', 'yes') and conf.config_item_set('database', 'url'):
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(engine, conn) = setup_db_connection(conf.get_item("database", "url"))
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(gpgmw_keys) = define_db_schema()
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selq = select(gpgmw_keys.c.publickey, gpgmw_keys.c.id, gpgmw_keys.c.email)\
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.where(and_(gpgmw_keys.c.status == 0, gpgmw_keys.c.confirm == ""))\
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.limit(100)
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LOG.debug(f"Retrieving keys to be processed: {selq}")
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result_set = conn.execute(selq)
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for row in result_set:
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# delete any other public keys associated with this confirmed email address
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delq = delete(gpgmw_keys).where(and_(gpgmw_keys.c.email == row[2], gpgmw_keys.c.id != row[1]))
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LOG.debug(f"Deleting public keys associated with confirmed email: {delq}")
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conn.execute(delq)
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GnuPG.delete_key(conf.get_item('gpg', 'keyhome'), row[2])
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LOG.info('Deleted key for <' + row[2] + '> via import request')
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if row[0].strip(): # we have this so that user can submit blank key to remove any encryption
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if GnuPG.confirm_key(row[0], row[2]):
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GnuPG.add_key(conf.get_item('gpg', 'keyhome'), row[0]) # import the key to gpg
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modq = gpgmw_keys.update().where(gpgmw_keys.c.id == row[1]).values(status = 1)
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LOG.debug(f"Key imported, updating key: {modq}")
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conn.execute(modq) # mark key as accepted
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LOG.warning('Imported key from <' + row[2] + '>')
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if conf.config_item_equals('cron', 'send_email', 'yes'):
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send_msg( "PGP key registration successful", "registrationSuccess.md", row[2] )
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else:
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delq = delete(gpgmw_keys).where(gpgmw_keys.c.id == row[1])
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LOG.debug(f"Cannot confirm key, deleting it: {delq}")
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conn.execute(delq) # delete key
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LOG.warning('Import confirmation failed for <' + row[2] + '>')
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if conf.config_item_equals('cron', 'send_email', 'yes'):
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send_msg( "PGP key registration failed", "registrationError.md", row[2] )
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else:
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# delete key so we don't continue processing it
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delq = delete(gpgmw_keys).where(gpgmw_keys.c.id == row[1])
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LOG.debug(f"Deleting key: {delq}")
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conn.execute(delq)
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if conf.config_item_equals('cron', 'send_email', 'yes'):
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send_msg( "PGP key deleted", "keyDeleted.md", row[2])
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# delete keys
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stat2q = select(gpgmw_keys.c.email, gpgmw_keys.c.id).where(gpgmw_keys.c.status == 2).limit(100)
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stat2_result_set = conn.execute(stat2q)
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for row in stat2_result_set:
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GnuPG.delete_key(conf.get_item('gpg', 'keyhome'), row[0])
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delq = delete(gpgmw_keys).where(gpgmw_keys.c.id == row[1])
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LOG.debug(f"Deleting keys that have already been processed: {delq}")
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conn.execute(delq)
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LOG.info('Deleted key for <' + row[0] + '>')
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else:
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print("Warning: doing nothing since database settings are not configured!")
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LOG.error("Warning: doing nothing since database settings are not configured!")
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