Change crl-storer to only require that 1 of the IssuingDistributionPoint
URIs remain consistent between consecutive CRLs in the same sequence.
This allows us to add and remove IDP URIs, so we can change our IDP
scheme over time.
To facilitate this, also move all code which builds or parses IDP
extensions into a single place, so that we don't have to have multiple
definitions of the same types and similar code in many places.
Fixes https://github.com/letsencrypt/boulder/issues/7340
Part of https://github.com/letsencrypt/boulder/issues/7296
Move the CRL issuance logic -- building an x509.RevocationList template,
populating it with correctly-built extensions, linting it, and actually
signing it -- out of the //ca package and into the //issuance package.
This means that the CA's CRL code no longer needs to be able to reach
inside the issuance package to access its issuers and certificates (and
those fields will be able to be made private after the same is done for
OCSP issuance).
Additionally, improve the configuration of CRL issuance, create
additional checks on CRL's ThisUpdate and NextUpdate fields, and make it
possible for a CRL to contain two IssuingDistributionPoint URIs so that
we can migrate to shorter addresses.
IN-10045 tracks the corresponding production changes.
Fixes https://github.com/letsencrypt/boulder/issues/7159
Part of https://github.com/letsencrypt/boulder/issues/7296
Part of https://github.com/letsencrypt/boulder/issues/7294
Part of https://github.com/letsencrypt/boulder/issues/7094
Part of https://github.com/letsencrypt/boulder/issues/7100
Aaron Gable