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epriestley 080fb1985f Upgrade an old "weakDigest()" inside TOTP synchronization code
Summary:
Ref T13222. Ref T12509. When you add a new MFA TOTP authenticator, we generate a temporary token to make sure you're actually adding the key we generated and not picking your own key.

That is, if we just put inputs in the form like `key=123, response=456`, users could pick their own keys by changing the value of `key` and then generating the correct `response`. That's probably fine, but maybe attackers could somehow force users to pick known keys in combination with other unknown vulnerabilities that might exist in the future. Instead, we generate a random key and keep track of it to make sure nothing funny is afoot.

As an additional barrier, we do the standard "store the digest, not the real key" sort of thing so you can't force a known value even if you can read the database (although this is mostly pointless since you can just read TOTP secrets directly if you can read the database). But it's pretty standard and doesn't hurt anything.

Update this from SHA1 to SHA256. This will break any TOTP factors which someone was in the middle of adding during a Phabricator upgrade, but that seems reasonable. They'll get a sensible failure mode.

Test Plan: Added a new TOTP factor.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13222, T12509

Differential Revision: https://secure.phabricator.com/D19884
2018-12-13 16:16:13 -08:00
bin Add a bin/herald test ... for doing test runs via the CLI 2018-11-15 15:48:52 -08:00
conf Support "ssl.chain" in Aphlict configuration 2016-04-14 10:41:21 -07:00
externals Add profile images to Repositories 2017-06-12 07:51:39 -07:00
resources Upgrade sessions digests to HMAC256, retaining compatibility with old digests 2018-12-13 16:15:38 -08:00
scripts Add a bin/herald test ... for doing test runs via the CLI 2018-11-15 15:48:52 -08:00
src Upgrade an old "weakDigest()" inside TOTP synchronization code 2018-12-13 16:16:13 -08:00
support Use phutil_microseconds_since(...) to simplify some timing arithmetic 2018-11-08 16:46:32 -08:00
webroot Fix a bad method call signature throwing exceptions in newer Node 2018-12-10 16:01:00 -08:00
.arcconfig Set "history.immutable" to "false" explicitly in .arcconfig 2016-08-03 08:12:49 -07:00
.arclint Begin adding test coverage to GitHub Events API parsers 2016-03-09 09:30:07 -08:00
.arcunit Use the configuration driven unit test engine 2015-08-11 07:57:11 +10:00
.editorconfig Fix text lint issues 2015-02-12 07:00:13 +11:00
.gitignore Make i18n string extraction faster and more flexible 2016-07-04 10:23:30 -07:00
LICENSE Fix text lint issues 2015-02-12 07:00:13 +11:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README.md Remove push to IRC from "readme.md" too 2015-10-24 18:39:16 -07:00

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