[Freeipa-devel] [freeipa PR#359][comment] dogtag: search past the first 100 certificates

[frasertweedale]

  URL: https://github.com/freeipa/freeipa/pull/359
Title: #359: dogtag: search past the first 100 certificates

frasertweedale commented:
"""
@tomaskrizek @HonzaCholasta it looks like the problem is:

1. subsearches are conducted in order:
    1. `_cert_search` (if `'certificate' in options` add key to result and "seal" it)
    2. `_ca_search` (actually perform the search against Dogtag, via `ra.find`)
    3. `_ldap_search` (look for local entries that have given cert in their `userCertificate` attr.

2. Due to raising of search limit internally within `ra.find`, for this sub-search, `sub_complete = True` always.

3. ~line 1477:

    ```python
    if sub_complete:
        sizelimit = None
        ...
    ```
    This causes the next sub-search (`_ldap_search`) to be carried out with the *default* size limit (100).

4. If there are > 100 entries with the `(userCertificate=*)`, this search will be truncated, and this result is carried across to the final result.  The cert search from Dogtag is not truncated, but the search for entries to use to filter the result may have been truncated.

The simplest way to resolve this is (I think) to forcibly execute `_ldap_search` with `sizelimit=0`.
IMO `_ldap_search` should also be avoided or short-circuited if none of the owner-flitering options to `cert-find` are given.
"""

See the full comment at https://github.com/freeipa/freeipa/pull/359#issuecomment-270283124