mailinabox/management/mailconfig.py

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import subprocess, shutil, os, sqlite3, re
def validate_email(email, strict):
# There are a lot of characters permitted in email addresses, but
# Dovecot's sqlite driver seems to get confused if there are any
# unusual characters in the address. Bah. Also note that since
# the mailbox path name is based on the email address, the address
# shouldn't be absurdly long and must not have a forward slash.
if len(email) > 255: return False
if strict:
# For Dovecot's benefit, only allow basic characters.
ATEXT = r'[\w\-]'
else:
# Based on RFC 2822 and https://github.com/SyrusAkbary/validate_email/blob/master/validate_email.py,
# these characters are permitted in email address.
ATEXT = r'[\w!#$%&\'\*\+\-/=\?\^`\{\|\}~]' # see 3.2.4
DOT_ATOM_TEXT = ATEXT + r'+(?:\.' + ATEXT + r'+)*' # see 3.2.4
ADDR_SPEC = '^%s@%s$' % (DOT_ATOM_TEXT, DOT_ATOM_TEXT) # see 3.4.1
return re.match(ADDR_SPEC, email)
def open_database(env, with_connection=False):
conn = sqlite3.connect(env["STORAGE_ROOT"] + "/mail/users.sqlite")
if not with_connection:
return conn.cursor()
else:
return conn, conn.cursor()
def get_mail_users(env):
c = open_database(env)
c.execute('SELECT email FROM users')
return [row[0] for row in c.fetchall()]
def get_mail_aliases(env):
c = open_database(env)
c.execute('SELECT source, destination FROM aliases')
return [(row[0], row[1]) for row in c.fetchall()]
def get_mail_domains(env):
def get_domain(emailaddr):
return emailaddr.split('@', 1)[1]
return set([get_domain(addr) for addr in get_mail_users(env)] + [get_domain(addr1) for addr1, addr2 in get_mail_aliases(env)])
def add_mail_user(email, pw, env):
if not validate_email(email, True):
return ("Invalid email address.", 400)
# get the database
conn, c = open_database(env, with_connection=True)
# hash the password
pw = subprocess.check_output(["/usr/bin/doveadm", "pw", "-s", "SHA512-CRYPT", "-p", pw]).strip()
# add the user to the database
try:
c.execute("INSERT INTO users (email, password) VALUES (?, ?)", (email, pw))
except sqlite3.IntegrityError:
return ("User already exists.", 400)
# write databasebefore next step
conn.commit()
# Create the user's INBOX and Spam folders and subscribe them.
# Check if the mailboxes exist before creating them. When creating a user that had previously
# been deleted, the mailboxes will still exist because they are still on disk.
try:
existing_mboxes = subprocess.check_output(["doveadm", "mailbox", "list", "-u", email, "-8"], stderr=subprocess.STDOUT).decode("utf8").split("\n")
except subprocess.CalledProcessError as e:
c.execute("DELETE FROM users WHERE email=?", (email,))
conn.commit()
return ("Failed to initialize the user: " + e.output.decode("utf8"), 400)
if "INBOX" not in existing_mboxes: subprocess.check_call(["doveadm", "mailbox", "create", "-u", email, "-s", "INBOX"])
if "Spam" not in existing_mboxes: subprocess.check_call(["doveadm", "mailbox", "create", "-u", email, "-s", "Spam"])
# Create the user's sieve script to move spam into the Spam folder, and make it owned by mail.
maildirstat = os.stat(env["STORAGE_ROOT"] + "/mail/mailboxes")
(em_user, em_domain) = email.split("@", 1)
user_mail_dir = env["STORAGE_ROOT"] + ("/mail/mailboxes/%s/%s" % (em_domain, em_user))
if not os.path.exists(user_mail_dir):
os.makedirs(user_mail_dir)
os.chown(user_mail_dir, maildirstat.st_uid, maildirstat.st_gid)
shutil.copyfile(env["CONF_DIR"] + "/dovecot_sieve.txt", user_mail_dir + "/.dovecot.sieve")
os.chown(user_mail_dir + "/.dovecot.sieve", maildirstat.st_uid, maildirstat.st_gid)
# Update DNS in case any new domains are added.
from dns_update import do_dns_update
return do_dns_update(env)
def set_mail_password(email, pw, env):
# hash the password
pw = subprocess.check_output(["/usr/bin/doveadm", "pw", "-s", "SHA512-CRYPT", "-p", pw]).strip()
# update the database
conn, c = open_database(env, with_connection=True)
c.execute("UPDATE users SET password=? WHERE email=?", (pw, email))
if c.rowcount != 1:
return ("That's not a user (%s)." % email, 400)
conn.commit()
return "OK"
def remove_mail_user(email, env):
conn, c = open_database(env, with_connection=True)
c.execute("DELETE FROM users WHERE email=?", (email,))
if c.rowcount != 1:
return ("That's not a user (%s)." % email, 400)
conn.commit()
# Update DNS in case any domains are removed.
from dns_update import do_dns_update
return do_dns_update(env)
def add_mail_alias(source, destination, env):
if not validate_email(source, False):
return ("Invalid email address.", 400)
conn, c = open_database(env, with_connection=True)
try:
c.execute("INSERT INTO aliases (source, destination) VALUES (?, ?)", (source, destination))
except sqlite3.IntegrityError:
return ("Alias already exists (%s)." % source, 400)
conn.commit()
# Update DNS in case any new domains are added.
from dns_update import do_dns_update
return do_dns_update(env)
def remove_mail_alias(source, env):
conn, c = open_database(env, with_connection=True)
c.execute("DELETE FROM aliases WHERE source=?", (source,))
if c.rowcount != 1:
return ("That's not an alias (%s)." % source, 400)
conn.commit()
# Update DNS in case any domains are removed.
from dns_update import do_dns_update
return do_dns_update(env)