# Which Problems Are Solved
Adds a repository implementation to add/remove recovery codes to the
users relational table.
# How the Problems Are Solved
This is achieved by:
* adding the following columns to the users table: `recovery_codes`,
`recovery_code_last_successful_check`, `recovery_code_failed_attempts`
* adding the `RecoveryCodes` field to the `HumanUser` domain with fields
to set recovery `codes`, `lastSuccessfullyCheckedAt` timestamp, and
`failedAttempts`
* setting `recoveryCodes` in the `Get` user query statement to return a
json object with details related to the recovery codes
* adding the repository-layer implementation to add/remove recovery
codes and set fields related to recovery code checks.
* adding projection reducers to handle the following events:
`HumanRecoveryCodesAddedEvent`, `HumanRecoveryCodesRemovedEvent`,
`HumanRecoveryCodeCheckSucceededEvent`, and
`HumanRecoveryCodeCheckFailedEvent`
* adding unit tests
# Additional Changes
* fix the error message when the recovery is empty in
`internal/command/user_human_recovery_codes.go`
* add a new error message for empty recovery code during checks in
`en.yaml`
# Additional Context
- Closes https://github.com/zitadel/zitadel/issues/11212
- Follow-up: integration tests for the reducers will be added in a
different PR after this
[PR](https://github.com/zitadel/zitadel/pull/11478) is merged
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One-time recovery codes are a common multi-factor authentication (MFA)
backup method, letting users access their account if they lose other MFA
devices. Support for recovery codes can also reduce support burden for
users locked out of their accounts and provide a more secure and
reliable form of verification than security questions.
# Which Problems Are Solved
Zitadel currently lacks support for recovery codes.
# How the Problems Are Solved
This PR partially addresses recovery code support in Zitadel.
Importantly, it adds recovery codes as a new 2FA `Factor` and an
additional `Check` type for the Session API.
```
Example recovery code flow:
1. User generates N new recovery codes using `POST /v2/users/{user_id}/recovery_codes`
2. Zitadel hashes and stores these codes and returns the un-hashed codes in the response
3. User creates new session with an additional check: `recoveryCode`
4. Code is checked against hash and, if valid, cannot be used again
5. User attempts to adds N more codes using the same endpoint
6. If `remaining_codes + N <= RecoveryCodes->MaxCount` config value, then recovery codes are added in addition to original codes
7. User can remove all recovery codes using `DEL /v2/users/:userId/recovery_codes`
```
This PR adds:
- [x] Session recovery_code check support on `POST+PATCH /v2/sessions`
endpoints
- [x] Adds `mfa_recovery_code_checked_at` column (default null) to
`projections.sessions8` table
- [x] Support for `SECOND_FACTOR_TYPE_RECOVERY_CODES` as available 2FA
method on login policy
- [x] Support for importing recovery codes in /import code
Missing, will _not_ implement in this PR:
- [ ] Admin console support for displaying Recovery Code settings for
user(s)
- [ ] Zitadel Typescript login support for recovery codes
TODO:
- [x] Additional unit and integration tests
- [x] Error translations
# Additional Changes
None
# Additional Context
- Closes#6898
---------
Co-authored-by: Livio Spring <[email protected]>
Gayathri VijayanandGitHub
