Summary:
Ref T4398. We have several auth-related systems which require (or are improved by) the ability to hand out one-time codes which expire after a short period of time.
In particular, these are:
- SMS multi-factor: we need to be able to hand out one-time codes for this in order to prove the user has the phone.
- Password reset emails: we use a time-based rotating token right now, but we could improve this with a one-time token, so once you reset your password the link is dead.
- TOTP auth: we don't need to verify/invalidate keys, but can improve security by doing so.
This adds a generic one-time code storage table, and strengthens the TOTP enrollment process by using it. Specifically, you can no longer edit the enrollment form (the one with a QR code) to force your own key as the TOTP key: only keys Phabricator generated are accepted. This has no practical security impact, but generally helps raise the barrier potential attackers face.
Followup changes will use this for reset emails, then implement SMS multi-factor.
Test Plan:
- Enrolled in TOTP multi-factor auth.
- Submitted an error in the form, saw the same key presented.
- Edited the form with web tools to provide a different key, saw it reject and the server generate an alternate.
- Change the expiration to 5 seconds instead of 1 hour, submitted the form over and over again, saw it cycle the key after 5 seconds.
- Looked at the database and saw the tokens I expected.
- Ran the GC and saw all the 5-second expiry tokens get cleaned up.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T4398
Differential Revision: https://secure.phabricator.com/D9217
Summary: Ref T4398. I found a reasonable-ish LGPLv3 library for doing this, which isn't too huge or unwieldy.
Test Plan:
- Scanned QR code with Authy.
- Scanned QR code with Google Authenticator.
{F149317}
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T4398
Differential Revision: https://secure.phabricator.com/D8923
Summary:
Ref T4398. Allows auth factors to render and validate when prompted to take a hi-sec action.
This has a whole lot of rough edges still (see D8875) but does fundamentally work correctly.
Test Plan:
- Added two different TOTP factors to my account for EXTRA SECURITY.
- Took hisec actions with no auth factors, and with attached auth factors.
- Hit all the error/failure states of the hisec entry process.
- Verified hisec failures appear in activity logs.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T4398
Differential Revision: https://secure.phabricator.com/D8886
Summary:
Ref T4398. This is still pretty rough and isn't exposed in the UI yet, but basically works. Some missing features / areas for improvement:
- Rate limiting attempts (see TODO).
- Marking tokens used after they're used once (see TODO), maybe. I can't think of ways an attacker could capture a token without also capturing a session, offhand.
- Actually turning this on (see TODO).
- This workflow is pretty wordy. It would be nice to calm it down a bit.
- But also add more help/context to help users figure out what's going on here, I think it's not very obvious if you don't already know what "TOTP" is.
- Add admin tool to strip auth factors off an account ("Help, I lost my phone and can't log in!").
- Add admin tool to show users who don't have multi-factor auth? (so you can pester them)
- Generate QR codes to make the transfer process easier (they're fairly complicated).
- Make the "entering hi-sec" workflow actually check for auth factors and use them correctly.
- Turn this on so users can use it.
- Adding SMS as an option would be nice eventually.
- Adding "password" as an option, maybe? TOTP feels fairly good to me.
I'll post a couple of screens...
Test Plan:
- Added TOTP token with Google Authenticator.
- Added TOTP token with Authy.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T4398
Differential Revision: https://secure.phabricator.com/D8875
