On 8/14/16 1:23 PM, Rohan Verma wrote: > On Sat, Aug 13, 2016 at 1:47 AM, Dave Brondsema <d...@brondsema.net> wrote: > >> I'd like to work on multifactor authentication soon. I've done some >> thinking >> about it already, and here's what I've got so far. >> >> I reviewed several other sites to see how they use 2FA and put some >> screenshots >> together of how I think it would work best: http://imgur.com/a/SDKHE >> >> Standard two-factor authentication uses TOTP (time-based one-time password) >> which is all based on a secret key shared between the server and your >> phone app >> (via a QR code) and then validation codes match up based on the current >> time. >> Many python libraries support this, but cryptography.io seems like the >> best >> option. >> https://cryptography.io/en/latest/hazmat/primitives/ >> twofactor/#cryptography.hazmat.primitives.twofactor.totp.TOTP >> We'd want a plugin option for where to store the secret key: default to >> mongo, >> so it "just works" for anyone running Allura, but other plugins to store >> on home >> directories for example, so it works with other things (e.g that's where >> the PAM >> module for TOTP stores keys). >> >> A newer and stronger protocol is U2F which is hardware keys like those >> provided >> by Yubikey. Only Chrome works with this so far (and a Firefox plugin). >> Google >> and GitHub support this, not many others yet. https://twofactorauth.org/ >> shows >> who supports what. U2F can be run as a standalone server (U2FVAL) but >> should >> also be possible to embed into a python service with this lib >> https://github.com/Yubico/python-u2flib-server This would be nice to >> support, >> but maybe as a second phase though. >> > > To test this, hardware will also be needed. > > I had bookmarked this page ( > http://tinyhack.com/2015/11/08/teensy-lc-u2f-key/) a long time ago. It uses > a Teensy LC for U2F key. Maybe this could be of use. Although you might be > able to find a U2F key easily in the USA. >
Cool, that's a neat option. I bought a basic Yubikey recently. They are available on Amazon and yubico.com > >> >> Phone validation is an option too, and we have a PhoneService plugin. >> However, >> that is susceptible to hacks, like someone changing your phone number to a >> different device, and then getting your verification codes. Could be an >> option >> though. And a text message could be a handy way to send people a link to >> install Google Authenticator or similar apps on their phone. >> >> Backup recovery codes are completely separate from TOTP or U2F. They are >> just >> extra one-time use codes. They should be stored securely with a hash and >> removed after use. http://security.stackexchange.com/a/133010 >> >> At a project level (or neighborhood or system) it may be useful to show who >> doesn't have 2FA enabled (e.g. GitHub does this). There could also be an >> option >> to require it. >> >> Thoughts? Suggestions? >> >> >> >> -- >> Dave Brondsema : d...@brondsema.net >> http://www.brondsema.net : personal >> http://www.splike.com : programming >> <>< >> > > > -- Dave Brondsema : d...@brondsema.net http://www.brondsema.net : personal http://www.splike.com : programming <><
