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authorJeremy Allison <jra@samba.org>2003-05-17 00:46:26 +0000
committerJeremy Allison <jra@samba.org>2003-05-17 00:46:26 +0000
commit271ce52dbe2d28935e8203700d18b4933576fd01 (patch)
tree9dcf13716224228042f2dfb0d7a434f036d549cb /source3
parentde7cd07a29f3ce696d703f1a9c718f05bd8de4cc (diff)
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Cope with cumulative permissions sets. This code is #ifdef'ed out at the
moment as I don't think cumulative permission sets make sense in POSIX even though that's the way Windows works.... Jeremy. (This used to be commit 34b170a82c02b462f9d0de85922bf8f26a260c67)
Diffstat (limited to 'source3')
-rw-r--r--source3/smbd/posix_acls.c50
1 files changed, 49 insertions, 1 deletions
diff --git a/source3/smbd/posix_acls.c b/source3/smbd/posix_acls.c
index 6925b35246..86efd8fb96 100644
--- a/source3/smbd/posix_acls.c
+++ b/source3/smbd/posix_acls.c
@@ -1171,7 +1171,7 @@ Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
/****************************************************************************
ASCII art time again... JRA :-).
- We have 3 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
+ We have 4 cases to process when moving from an NT ACL to a POSIX ACL. Firstly,
we insist the ACL is in canonical form (ie. all DENY entries preceede ALLOW
entries). Secondly, the merge code has ensured that all duplicate SID entries for
allow or deny have been merged, so the same SID can only appear once in the deny
@@ -1244,6 +1244,15 @@ Deny entry after Allow entry. Failing to set on file %s.\n", fsp->fsp_name ));
best we can do and has the advantage of failing closed rather
than open.
---------------------------------------------------------------------------
+ Fourth pass - cope with cumulative permissions.
+
+ for all allow user entries, if there exists an allow group entry with
+ more permissive permissions, and the user is in that group, rewrite the
+ allow user permissions to contain both sets of permissions.
+
+ Currently the code for this is #ifdef'ed out as these semantics make
+ no sense to me. JRA.
+ ---------------------------------------------------------------------------
Note we *MUST* do the deny user pass first as this will convert deny user
entries into allow user entries which can then be processed by the deny
@@ -1433,6 +1442,45 @@ static void process_deny_list( canon_ace **pp_ace_list )
}
+ /* Doing this fourth pass allows Windows semantics to be layered
+ * on top of POSIX semantics. I'm not sure if this is desirable.
+ * For example, in W2K ACLs there is no way to say, "Group X no
+ * access, user Y full access" if user Y is a member of group X.
+ * This seems completely broken semantics to me.... JRA.
+ */
+
+#if 0
+ /* Pass 4 above - deal with allow entries. */
+
+ for (curr_ace = ace_list; curr_ace; curr_ace = curr_ace_next) {
+ canon_ace *allow_ace_p;
+
+ curr_ace_next = curr_ace->next; /* So we can't lose the link. */
+
+ if (curr_ace->attr != ALLOW_ACE)
+ continue;
+
+ if (curr_ace->owner_type != UID_ACE)
+ continue;
+
+ for (allow_ace_p = ace_list; allow_ace_p; allow_ace_p = allow_ace_p->next) {
+
+ if (allow_ace_p->attr != ALLOW_ACE)
+ continue;
+
+ /* We process GID_ACE entries only. */
+
+ if (allow_ace_p->owner_type != GID_ACE)
+ continue;
+
+ /* OR in the group perms. */
+
+ if (uid_entry_in_group( curr_ace, allow_ace_p))
+ curr_ace->perms |= allow_ace_p->perms;
+ }
+ }
+#endif
+
*pp_ace_list = ace_list;
}