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open-vault/changelog/16773.txt

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Support for generating Delta CRLs (#16773) * Allow generation of up-to-date delta CRLs While switching to periodic rebuilds of CRLs alleviates the constant rebuild pressure on Vault during times of high revocation, the CRL proper becomes stale. One response to this is to switch to OCSP, but not every system has support for this. Additionally, OCSP usually requires connectivity and isn't used to augment a pre-distributed CRL (and is instead used independently). By generating delta CRLs containing only new revocations, an existing CRL can be supplemented with newer revocations without requiring Vault to rebuild all complete CRLs. Admins can periodically fetch the delta CRL and add it to the existing CRL and applications should be able to support using serials from both. Because delta CRLs are emptied when the next complete CRL is rebuilt, it is important that applications fetch the delta CRL and correlate it to their complete CRL; if their complete CRL is older than the delta CRL's extension number, applications MUST fetch the newer complete CRL to ensure they have a correct combination. This modifies the revocation process and adds several new configuration options, controlling whether Delta CRLs are enabled and when we'll rebuild it. Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com> * Add tests for delta CRLs Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com> * Add changelog entry Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com> * Add documentation on delta CRLs Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com> * Address review feedback: fix several bugs Thanks Steve! Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com> * Correctly invoke periodic func on active nodes We need to ensure we read the updated config (in case of OCSP request handling on standby nodes), but otherwise want to avoid CRL/DeltaCRL re-building. Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com> Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
2022-08-29 15:37:09 +00:00
```release-note:improvement
secrets/pki: Support generating delta CRLs for up-to-date CRLs when auto-building is enabled.
```