By not advertising SMTPUTF8 support at the start, senders may opt to transmit recipient internationalized domain names in IDNA form instead, which will be deliverable.
Incoming mail with internationalized domains was probably working prior to our move to Ubuntu 18.04 when postfix's SMTPUTF8 support became enabled by default.
The previous commit is retained because Mail-in-a-Box users might prefer to keep SMTPUTF8 on for outbound mail, if they are not using internationalized domains for email, in which case the previous commit fixes the 'relay access denied' error even if the emails aren't deliverable.
When an email is received by Postfix using SMTPUTF8 and the recipient domain is a Unicode internationalized domain, it was failing to be delivered (bouncing with 'relay access denied') because our users and aliases tables only store ASCII (IDNA) forms of internationalized domains. In this commit, domain maps are added to the auto_aliases table from the Unicode form of each mail domain to its IDNA form, if those forms are different. The Postfix domains query is updated to look at the auto_aliases table now as well, since it is the only table with Unicode forms of the mail domains.
However, mail delivery is still not working since the Dovecot LMTP server does not support SMTPUTF8, and mail still bounces but with an error that SMTPUTF8 is not supported.
They really should never have been conflated with the user-provided aliases.
Update the postfix alias map to query the automatically generated aliases with lowest priority.
The /admin/munin routes used the same Authorization: header logic as the other API routes, but they are browsed directly in the browser because they are handled as static pages or as a proxy to a CGI script.
This required users to enter their email username/password for HTTP basic authentication in the standard browser auth prompt, which wasn't ideal (and may leak the password in browser storage). It also stopped working when MFA was enabled for user accounts.
A token is now set in a cookie when visiting /admin/munin which is then checked in the routes that proxy the Munin pages. The cookie's lifetime is kept limited to limit the opportunity for any unknown CSRF attacks via the Munin CGI script.
* When logged out, no menu items are shown.
* When logged in, Log Out is shown.
* When logged in as an admin, the remaining menu items are also shown.
* When logged in as a non-admin, the mail and contacts/calendar instruction pages are shown.
Fixes#1987
* Rename the 'master' API key to be called the 'system' API key
* Generate the key using the Python secrets module which is meant for this
* Remove some debugging helper code which will be obsoleted by the upcoming changes for session keys
Port 465 with "implicit" (i.e. always-on) TLS is a more secure approach than port 587 with explicit (i.e. optional and only on with STARTTLS). Although we reject credentials on port 587 without STARTTLS, by that point credentials have already been sent.
All A/AAAA-resolvable domains that don't send or receive mail should have these null records.
This simplifies the handling of domains a bit by handling automatically generated subdomains more like other domains.
* SC2068: Double quote array expansions to avoid re-splitting elements.
* SC2186: tempfile is deprecated. Use mktemp instead.
* SC2124: Assigning an array to a string! Assign as array, or use * instead of @ to concatenate.
* SC2102: Ranges can only match single chars (mentioned due to duplicates).
* SC2005: Useless echo? Instead of 'echo $(cmd)', just use 'cmd'.
This change will force everyone to be logged out of Roundcube since the encryption key and cipher won't match anyone's already-set cookie, but this happens anyway after every Mail-in-a-Box update since we generate a new key each time already.
Fixes#1968.
* Stop generating RSASHA1-NSEC3-SHA1 keys on new installs since it is no longer recommended, but preserve the key on existing installs so that we continue to sign zones with existing keys to retain the chain of trust with existing DS records.
* Start generating ECDSAP256SHA256 keys during setup, the current best practice (in addition to RSASHA256 which is also ok). See https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml#dns-sec-alg-numbers-1 and https://www.cloudflare.com/dns/dnssec/ecdsa-and-dnssec/.
* Sign zones using all available keys rather than choosing just one based on the TLD to enable rotation/migration to the new key and to give the user some options since not every registrar/TLD supports every algorithm.
* Allow a user to drop a key from signing specific domains using DOMAINS= in our key configuration file. Signing the zones with extraneous keys may increase the size of DNS responses, which isn't ideal, although I don't know if this is a problem in practice. (Although a user can delete the RSASHA1-NSEC3-SHA1 key file, the other keys will be re-generated on upgrade.)
* When generating zonefiles, add a hash of all of the DNSSEC signing keys so that when the keys change the zone is definitely regenerated and re-signed.
* In status checks, if DNSSEC is not active (or not valid), offer to use all of the keys that have been generated (for RSASHA1-NSEC3-SHA1 on existing installs, RSASHA256, and now ECDSAP256SHA256) with all digest types, since not all registers support everything, but list them in an order that guides users to the best practice.
* In status checks, if the deployed DS record doesn't use a ECDSAP256SHA256 key, prompt the user to update their DS record.
* In status checks, if multiple DS records are set, only fail if none are valid. If some use ECDSAP256SHA256 and some don't, remind the user to delete the DS records that don't.
* Don't fail if the DS record uses the SHA384 digest (by pre-generating a DS record with that digest type) but don't recommend it because it is not in the IANA mandatory list yet (https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml).
See #1953
This reverts commit b1d703a5e7 and adds python3-setuptools per the first version of #1899 which fixes an installation error for the b2sdk Python package.
* add user interface for managing 2fa
* update user schema with 2fa columns
* implement two factor check during login
* Use pyotp for validating TOTP codes
* also implements resynchronisation support via `pyotp`'s `valid_window option
* Update API route naming, update setup page
* Rename /two-factor-auth/ => /2fa/
* Nest totp routes under /2fa/totp/
* Update ids and methods in panel to allow for different setup types
* Autofocus otp input when logging in, update layout
* Extract TOTPStrategy class to totp.py
* this decouples `TOTP` validation and storage logic from `auth` and moves it to `totp`
* reduce `pyotp.validate#valid_window` from `2` to `1`
* Update OpenApi docs, rename /2fa/ => /mfa/
* Decouple totp from users table by moving to totp_credentials table
* this allows implementation of other mfa schemes in the future (webauthn)
* also makes key management easier and enforces one totp credentials per user on db-level
* Add sqlite migration
* Rename internal validate_two_factor_secret => validate_two_factor_secret
* conn.close() if mru_token update can't .commit()
* Address review feedback, thanks @hija
* Use hmac.compare_digest() to compare mru_token
* Safeguard against empty mru_token column
* hmac.compare_digest() expects arguments of type string, make sure we don't pass None
* Currently, this cannot happen but we might not want to store `mru_token` during setup
* Do not log failed login attempts for MissingToken errors
* Due to the way that the /login UI works, this persists at least one failed login each time a user logs into the admin panel. This in turn triggers fail2ban at some point.
* Add TOTP secret to user_key hash
thanks @downtownallday
* this invalidates all user_keys after TOTP status is changed for user
* after changing TOTP state, a login is required
* due to the forced login, we can't and don't need to store the code used for setup in `mru_code`
* Typo
* Reorganize the MFA backend methods
* Reorganize MFA front-end and add label column
* Fix handling of bad input when enabling mfa
* Update openAPI docs
* Remove unique key constraint on foreign key user_id in mfa table
* Don't expose mru_token and secret for enabled mfas over HTTP
* Only update mru_token for matched mfa row
* Exclude mru_token in user key hash
* Rename tools/mail.py to management/cli.py
* Add MFA list/disable to the management CLI so admins can restore access if MFA device is lost
Co-authored-by: Joshua Tauberer <jt@occams.info>
v0.50 (September 25, 2020)
--------------------------
Setup:
* When upgrading from versions before v0.40, setup will now warn that ownCloud/Nextcloud data cannot be migrated rather than failing the installation.
Mail:
* An MTA-STS policy for incoming mail is now published (in DNS and over HTTPS) when the primary hostname and email address domain both have a signed TLS certificate installed, allowing senders to know that an encrypted connection should be enforced.
* The per-IP connection limit to the IMAP server has been doubled to allow more devices to connect at once, especially with multiple users behind a NAT.
DNS:
* autoconfig and autodiscover subdomains and CalDAV/CardDAV SRV records are no longer generated for domains that don't have user accounts since they are unnecessary.
* IPv6 addresses can now be specified for secondary DNS nameservers in the control panel.
TLS:
* TLS certificates are now provisioned in groups by parent domain to limit easy domain enumeration and make provisioning more resilient to errors for particular domains.
Control Panel:
* The control panel API is now fully documented at https://mailinabox.email/api-docs.html.
* User passwords can now have spaces.
* Status checks for automatic subdomains have been moved into the section for the parent domain.
* Typo fixed.
Web:
* The default web page served on fresh installations now adds the `noindex` meta tag.
* The HSTS header is revised to also be sent on non-success responses.
These subdomains/records are for automatic configuration of mail clients, but if there are no user accounts on a domain, there is no need to publish a DNS record, provision a TLS certificate, or create an nginx server config block.
* Create the mta_sts A/AAAA records even if there is no valid TLS certificate because we can't get a TLS certificate if we don't set up the domains.
* Make the policy id in the TXT record stable by using a hash of the policy file so that the DNS record doesn't change every day, which means no nightly notification and also it allows for longer caching by sending MTAs.
Folks didn't want certificates exposing all of the domains hosted by the server (although this can already be found on the internet).
Additionally, if one domain fails (usually because of a misconfiguration), it would be nice if not everything fails. So grouping them helps with that.
Fixes#690.
Joshua Tauberer