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.

5 files changed, 25 insertions, 4 deletions

diff --git a/src/providers/ipa/ipa_common.c b/src/providers/ipa/ipa_common.c
index b3467c60..401c1930 100644
--- a/src/providers/ipa/ipa_common.c
+++ b/src/providers/ipa/ipa_common.c
@@ -86,7 +86,11 @@ struct dp_option ipa_def_ldap_opts[] = {
     { "ldap_access_order", DP_OPT_STRING, NULL_STRING, 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 ipa_attr_map[] = {
diff --git a/src/providers/ipa/ipa_common.h b/src/providers/ipa/ipa_common.h
index 39fe31dc..ed67a2c7 100644
--- a/src/providers/ipa/ipa_common.h
+++ b/src/providers/ipa/ipa_common.h
@@ -35,7 +35,7 @@ struct ipa_service {
 /* the following defines are used to keep track of the options in the ldap
  * module, so that if they change and ipa is not updated correspondingly
  * this will trigger a runtime abort error */
-#define IPA_OPTS_BASIC_TEST 47
+#define IPA_OPTS_BASIC_TEST 48
 
 /* the following define is used to keep track of the options in the krb5
  * module, so that if they change and ipa is not updated correspondingly
diff --git a/src/providers/ldap/ldap_auth.c b/src/providers/ldap/ldap_auth.c
index 853231b3..f4bbabf6 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 f56d01f0..f2ea16ae 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 e053210a..31e72cd5 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 */
 };