From 2d9286102f23ea9d13213f1176ba669b9315a75f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20B=C5=99ezina?= <pbrezina@redhat.com>
Date: Thu, 6 Sep 2018 13:38:56 +0200
Subject: [PATCH] sudo: respect case sensitivity in sudo responder
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If the domain is not case sensitive and the case of the original user
or group name differs from the name in the rule we failed to find the
rule.

Now we filter the rule only with lower cased values in such domain.

Steps to reproduce:
1. Add user/group with upper case, e.g. USER-1
2. Add sudo rule with lower cased name, e.g. sudoUser: user-1
3. Login to system with lower case, e.g. user-1
4. Run sudo -l

Without the patch, rule is not found.

Resolves:
https://pagure.io/SSSD/sssd/issue/3820

Reviewed-by: Michal Židek <mzidek@redhat.com>
(cherry picked from commit d7f0b58e2896ed2ef9ed5a390815c1e4df6caaee)
---
 src/db/sysdb_sudo.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/db/sysdb_sudo.c b/src/db/sysdb_sudo.c
index 3ad462d8f..19ed97b86 100644
--- a/src/db/sysdb_sudo.c
+++ b/src/db/sysdb_sudo.c
@@ -418,7 +418,17 @@ sysdb_get_sudo_user_info(TALLOC_CTX *mem_ctx,
         ret = EINVAL;
         goto done;
     }
-    DEBUG(SSSDBG_TRACE_FUNC, "original name: %s\n", orig_name);
+
+    DEBUG(SSSDBG_TRACE_FUNC, "Original name: %s\n", orig_name);
+
+    orig_name = sss_get_cased_name(tmp_ctx, orig_name, domain->case_sensitive);
+    if (orig_name == NULL) {
+        DEBUG(SSSDBG_CRIT_FAILURE, "Out of memory!\n");
+        ret = ENOMEM;
+        goto done;
+    }
+
+    DEBUG(SSSDBG_TRACE_FUNC, "Cased name: %s\n", orig_name);
 
     if (_uid != NULL) {
         uid = ldb_msg_find_attr_as_uint64(res->msgs[0], SYSDB_UIDNUM, 0);
@@ -450,8 +460,9 @@ sysdb_get_sudo_user_info(TALLOC_CTX *mem_ctx,
                     continue;
                 }
 
-                sysdb_groupnames[num_groups] = talloc_strdup(sysdb_groupnames,
-                                                             groupname);
+                sysdb_groupnames[num_groups] = \
+                    sss_get_cased_name(sysdb_groupnames, groupname,
+                                       domain->case_sensitive);
                 if (sysdb_groupnames[num_groups] == NULL) {
                     DEBUG(SSSDBG_MINOR_FAILURE, "Cannot strdup %s\n", groupname);
                     continue;
-- 
2.19.1