SDAP: Fix id mapping with disabled subdomains

If subdomains are disabled "subdomain_provider = none"
then auto-discovery discovery of domain SID is disabled.
It is possible to configure options ldap_idmap_default_domain{,_sid}
and id mapping should work.

However value of option ldap_idmap_default_domain_sid was not assigned to
sss_domain_info for main domain. It was only used for initialisation of
sdap_idmap_ctx. As a result of this bug posix attributes were used in
ldap filter and id mapping worked just for users with posix attributes.

[be_get_account_info] (0x0100): Got request for [0x1001][1][name=user]
[be_req_set_domain] (0x0400):
        Changing request domain from [EXAMPLE.TEST] to [EXAMPLE.TEST]
[sdap_idmap_domain_has_algorithmic_mapping] (0x0080):
        Could not parse domain SID from [(null)]
[sdap_idmap_domain_has_algorithmic_mapping] (0x0080):
        Could not parse domain SID from [(null)]
[sdap_search_user_next_base] (0x0400):
        Searching for users with base [DC=EXAMPLE,DC=TEST]
[sdap_get_generic_ext_step] (0x0400):
        calling ldap_search_ext with
                        [(&(sAMAccountName=hdpadmin)(objectclass=user)
                           (sAMAccountName=*)(&(uidNumber=*)(!(uidNumber=0))))]
                        [DC=EXAMPLE,DC=TEST].
[sdap_search_user_process] (0x0400): Search for users, returned 0 results.
[sdap_get_users_done] (0x0040): Failed to retrieve users

Resolves:
https://fedorahosted.org/sssd/ticket/2635

Reviewed-by: Pavel Březina <pbrezina@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/providers/ldap/sdap_idmap.c b/src/providers/ldap/sdap_idmap.c
index 0a82e61f7..dd959b2c1 100644
--- a/src/providers/ldap/sdap_idmap.c
+++ b/src/providers/ldap/sdap_idmap.c
@@ -288,6 +288,13 @@ sdap_idmap_init(TALLOC_CTX *mem_ctx,
 
         sid_str = dp_opt_get_string(idmap_ctx->id_ctx->opts->basic, SDAP_IDMAP_DEFAULT_DOMAIN_SID);
         if (sid_str) {
+            struct sss_domain_info *domain = idmap_ctx->id_ctx->be->domain;
+            domain->domain_id = talloc_strdup(domain, sid_str);
+            if (domain->domain_id == NULL) {
+                ret = ENOMEM;
+                goto done;
+            }
+
             /* Set the default domain as slice 0 */
             ret = sdap_idmap_add_domain(idmap_ctx, dom_name,
                                         sid_str, 0);