Add option to disable TLS for LDAP auth

Option is named to discourage use in production environments and
is intentionally not listed in the SSSDConfig API.

3 files changed, 19 insertions, 2 deletions

diff --git a/src/providers/ldap/ldap_auth.c b/src/providers/ldap/ldap_auth.c
index 853231b36..f4bbabf6b 100644
--- a/src/providers/ldap/ldap_auth.c
+++ b/src/providers/ldap/ldap_auth.c
@@ -536,6 +536,7 @@ static void auth_resolve_done(struct tevent_req *subreq)
     struct auth_state *state = tevent_req_data(req,
                                                     struct auth_state);
     int ret;
+    bool use_tls;
 
     ret = be_resolve_server_recv(subreq, &state->srv);
     talloc_zfree(subreq);
@@ -546,8 +547,19 @@ static void auth_resolve_done(struct tevent_req *subreq)
         return;
     }
 
+    /* Check for undocumented debugging feature to disable TLS
+     * for authentication. This should never be used in production
+     * for obvious reasons.
+     */
+    use_tls = !dp_opt_get_bool(state->ctx->opts->basic, SDAP_DISABLE_AUTH_TLS);
+    if (!use_tls) {
+        sss_log(SSS_LOG_ALERT, "LDAP authentication being performed over "
+                               "insecure connection. This should be done "
+                               "for debugging purposes only.");
+    }
+
     subreq = sdap_connect_send(state, state->ev, state->ctx->opts,
-                               state->sdap_service->uri, true);
+                               state->sdap_service->uri, use_tls);
     if (!subreq) {
         tevent_req_error(req, ENOMEM);
         return;
diff --git a/src/providers/ldap/ldap_common.c b/src/providers/ldap/ldap_common.c
index f56d01f00..f2ea16aec 100644
--- a/src/providers/ldap/ldap_common.c
+++ b/src/providers/ldap/ldap_common.c
@@ -81,7 +81,11 @@ struct dp_option default_basic_opts[] = {
     { "ldap_access_order", DP_OPT_STRING, { "filter" }, NULL_STRING },
     { "ldap_chpass_uri", DP_OPT_STRING, NULL_STRING, NULL_STRING },
     { "ldap_chpass_dns_service_name", DP_OPT_STRING, NULL_STRING, NULL_STRING },
-    { "ldap_enumeration_search_timeout", DP_OPT_NUMBER, { .number = 60 }, NULL_NUMBER }
+    { "ldap_enumeration_search_timeout", DP_OPT_NUMBER, { .number = 60 }, NULL_NUMBER },
+    /* Do not include ldap_auth_disable_tls_never_use_in_production in the
+     * manpages or SSSDConfig API
+     */
+    { "ldap_auth_disable_tls_never_use_in_production", DP_OPT_BOOL, BOOL_FALSE, BOOL_FALSE }
 };
 
 struct sdap_attr_map generic_attr_map[] = {
diff --git a/src/providers/ldap/sdap.h b/src/providers/ldap/sdap.h
index e053210af..31e72cd5b 100644
--- a/src/providers/ldap/sdap.h
+++ b/src/providers/ldap/sdap.h
@@ -200,6 +200,7 @@ enum sdap_basic_opt {
     SDAP_CHPASS_URI,
     SDAP_CHPASS_DNS_SERVICE_NAME,
     SDAP_ENUM_SEARCH_TIMEOUT,
+    SDAP_DISABLE_AUTH_TLS,
 
     SDAP_OPTS_BASIC /* opts counter */
 };