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From b53c3e5fb5c90813ce1b47ddc570dd9c800232f9 Mon Sep 17 00:00:00 2001
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From: Sumit Bose <sbose@redhat.com>
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Date: Fri, 3 Jul 2020 17:18:27 +0200
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Subject: [PATCH] Use startTLS with FreeIPA
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FreeIPA is planning to required a minimal security strength factor (ssf)
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in an upcoming version. This basically means that communication should
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be encrypted. The most straight forward way is use TLS by doing a
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StartLS operation after the rootDSE lookup. Since FreeIPA supports TLS
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since the initial release we will call StartTLS unconditionally but try
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without if it fails.
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Resolves: https://gitlab.freedesktop.org/realmd/realmd/-/issues/23
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---
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service/realm-disco-rootdse.c | 23 +++++++++++++++++++++++
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service/realm-ldap.c | 4 +++-
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2 files changed, 26 insertions(+), 1 deletion(-)
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diff --git a/service/realm-disco-rootdse.c b/service/realm-disco-rootdse.c
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index 3100650..7614071 100644
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--- a/service/realm-disco-rootdse.c
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+++ b/service/realm-disco-rootdse.c
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@@ -226,10 +226,33 @@ request_domain_info (GTask *task,
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LDAP *ldap)
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{
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const char *attrs[] = { "info", "associatedDomain", NULL };
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+ int ret;
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+ int ldap_opt_val;
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clo->request = NULL;
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clo->result = result_domain_info;
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+ /* Trying to setup a TLS tunnel in the case the IPA server requires an
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+ * encrypted connected. Trying without in case of an error. Since we
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+ * most probably do not have the IPA CA certificate we will not check
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+ * the server certificate. */
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+ ldap_opt_val = LDAP_OPT_X_TLS_NEVER;
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+ ret = ldap_set_option (ldap, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_opt_val);
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+ if (ret != LDAP_OPT_SUCCESS) {
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+ g_debug ("Failed to disable certificate checking, trying without");
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+ }
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+
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+ ldap_opt_val = 0;
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+ ret = ldap_set_option (ldap, LDAP_OPT_X_TLS_NEWCTX, &ldap_opt_val);
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+ if (ret != LDAP_OPT_SUCCESS) {
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+ g_debug ("Failed to refresh LDAP context for TLS, trying without");
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+ }
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+
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+ ret = ldap_start_tls_s (ldap, NULL, NULL);
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+ if (ret != LDAP_SUCCESS) {
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+ g_debug ("Failed to setup TLS tunnel, trying without");
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+ }
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+
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return search_ldap (task, clo, ldap, clo->default_naming_context,
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LDAP_SCOPE_BASE, NULL, attrs);
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}
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diff --git a/service/realm-ldap.c b/service/realm-ldap.c
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index 59817fb..7831b5b 100644
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--- a/service/realm-ldap.c
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+++ b/service/realm-ldap.c
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@@ -238,7 +238,9 @@ realm_ldap_connect_anonymous (GSocketAddress *address,
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if (!g_unix_set_fd_nonblocking (ls->sock, FALSE, NULL))
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g_warning ("couldn't set to blocking");
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- rc = ldap_init_fd (ls->sock, 1, NULL, &ls->ldap);
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+ url = g_strdup_printf ("ldap://%s:%d", addrname, port);
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+ rc = ldap_init_fd (ls->sock, 1, url, &ls->ldap);
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+ g_free (url);
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g_free (native);
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--
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2.26.2
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