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From be1e3bbfc13aff9a583108376f245b81cc3666fb Mon Sep 17 00:00:00 2001
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From: Rob Crittenden <rcritten@redhat.com>
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Date: Thu, 9 Sep 2021 15:26:55 -0400
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Subject: [PATCH] Don't store entries with a usercertificate in the LDAP cache
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usercertificate often has a subclass and both the plain and
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subclassed (binary) values are queried. I'm concerned that
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they are used more or less interchangably in places so not
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caching these entries is the safest path forward for now until
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we can dedicate the time to find all usages, determine their
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safety and/or perhaps handle this gracefully within the cache
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now.
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What we see in this bug is that usercertificate;binary holds the
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first certificate value but a user-mod is done with
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setattr usercertificate=<new_cert>. Since there is no
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usercertificate value (remember, it's usercertificate;binary)
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a replace is done and 389-ds wipes the existing value as we've
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asked it to.
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I'm not comfortable with simply treating them the same because
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in LDAP they are not.
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https://pagure.io/freeipa/issue/8986
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Signed-off-by: Rob Crittenden <rcritten@redhat.com>
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Reviewed-By: Francois Cami <fcami@redhat.com>
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Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>
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---
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ipapython/ipaldap.py | 14 +++++++++++---
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1 file changed, 11 insertions(+), 3 deletions(-)
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diff --git a/ipapython/ipaldap.py b/ipapython/ipaldap.py
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index f94b784d680f33d026e4d56ec8627d4d2ab87931..ced8f1bd66dc8f1f5c206677d2725d1e72b489f9 100644
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--- a/ipapython/ipaldap.py
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+++ b/ipapython/ipaldap.py
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@@ -1821,9 +1821,17 @@ class LDAPCache(LDAPClient):
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entry=None, exception=None):
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# idnsname - caching prevents delete when mod value to None
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# cospriority - in a Class of Service object, uncacheable
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- # TODO - usercertificate was banned at one point and I don't remember
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- # why...
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- BANNED_ATTRS = {'idnsname', 'cospriority'}
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+ # usercertificate* - caching subtypes is tricky, trade less
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+ # complexity for performance
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+ #
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+ # TODO: teach the cache about subtypes
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+
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+ BANNED_ATTRS = {
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+ 'idnsname',
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+ 'cospriority',
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+ 'usercertificate',
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+ 'usercertificate;binary'
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+ }
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if not self._enable_cache:
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return
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--
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2.31.1
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