anchela commented on code in PR #862:
URL: https://github.com/apache/jackrabbit-oak/pull/862#discussion_r1183470803
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oak-core/src/main/java/org/apache/jackrabbit/oak/security/user/ImpersonationImpl.java:
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@@ -173,13 +182,49 @@ private void updateImpersonatorNames(@NotNull Tree
userTree, @NotNull Set<String
private boolean isAdmin(@NotNull Principal principal) {
if (principal instanceof AdminPrincipal) {
return true;
- } else if (GroupPrincipals.isGroup(principal)) {
+ }
+ return Utils.isAdmin(principal, user.getUserManager());
+ }
+
+ private boolean isImpersonator(@NotNull Set<String> principalNames) {
+ Set<String> impersonatorGroups =
Set.of(user.getUserManager().getConfig().getConfigValue(
+ PARAM_IMPERSONATOR_GROUPS_ID,
+ new String[]{}));
+
+ if (impersonatorGroups.isEmpty()) {
return false;
- } else {
- return Utils.canImpersonateAllUsers(principal,
user.getUserManager());
}
+ return principalNames.stream()
+ .anyMatch(impersonatorGroups::contains);
}
+ public boolean isImpersonator(@NotNull Authorizable authorizable) {
+ Set<String> impersonatorGroups =
Set.of(user.getUserManager().getConfig().getConfigValue(
+ PARAM_IMPERSONATOR_GROUPS_ID,
+ new String[]{}));
+
+ if (impersonatorGroups.isEmpty()) {
+ return false;
+ }
+
+ try {
+ Iterator<Group> it = authorizable.memberOf();
Review Comment:
hi @antoniu98 ,
> I believe the number of groups somebody is member of is also small most of
the times
uh.... in the setup i am having in mind it usually is somewhere between >2
and many. but most users are not member of a privileged group like some
administrators group. so the case we want to cover with this improvement is
only for a small number of users, right? for all the others looping over all
the groups will result no matching entry for the config.
> so it comes up to what is more expensive:
if you really want to know for sure lets create a benchmark.
regarding the question:
> I have a question: shouldn't we loop through the "principals of the
authorizable" when evaluating membership? By this I mean getting the subject
for the current authorizable.getPrincipal() and then get all the principals
associated to that subject ? If YES, I didn't know a way of getting the
subject, this is why I chose looping through the groups of a principal.
there is no reliable way to obtain the subject if you just have the
principal name of the potential impersonator at hand like in
`XPathConditionVisitor.visit(Condition.Impersonation condition) ` and don't get
passed a complete subject like in `Impersonation.allows(Subject)`. the API is
not aligned in the Visitor :(.
That's why I would turn the evaluation around for the XPathConditionVisitor:
- retrieve configured impersonator-principal-names from the config
- lookup the principals using PrincipalManager.getPrincipal
- if the configured principal is a group principal -> check if the principal
passed to the visitor is a member of that group
- if the configured principal is not a group (and we don't mandate group
principals) -> check if the name match. if we mandate that the config only
contains groups we ignore this case here (and log a message on warn if we want
to be nice).... but i wonder why we should limit it to group principals.
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