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From eafe5f3e981a951c0ff20807a0486cfa62dcc3ad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabiano=20Fid=C3=AAncio?= <fidencio@redhat.com>
Date: Wed, 25 Oct 2017 11:25:09 +0200
Subject: [PATCH 23/79] LDAP: Bind to the LDAP server also in the auth
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When dealing with id_provider not being the same as auth_provider, SSSD
has to bind the DN of the user which wants to authenticate with the
ldap_default_bind_dn and the password provided by the user.
In order to do so, the least intrusive way is just by replacing
sdap_connect*() functions by sdap_cli_connect*() functions in the LDAP's
auth module.
The simple change also allowed us to remove some code that is already
executed as part of sdap_cli_connect*() and some functions had their
names adapted to reflect better their new purpose.
Resolves:
https://pagure.io/SSSD/sssd/issue/3451
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Sumit Bose <sbose@redhat.com>
---
src/providers/ldap/ldap_auth.c | 114 +++++++++--------------------------------
1 file changed, 25 insertions(+), 89 deletions(-)
diff --git a/src/providers/ldap/ldap_auth.c b/src/providers/ldap/ldap_auth.c
index 00ddd889b6294e457c13218491547b84f1468266..a3b1480aae4272d2e10f105a1eaf3a5816c3487c 100644
--- a/src/providers/ldap/ldap_auth.c
+++ b/src/providers/ldap/ldap_auth.c
@@ -619,14 +619,11 @@ struct auth_state {
char *dn;
enum pwexpire pw_expire_type;
void *pw_expire_data;
-
- struct fo_server *srv;
};
-static struct tevent_req *auth_get_server(struct tevent_req *req);
+static struct tevent_req *auth_connect_send(struct tevent_req *req);
static void auth_get_dn_done(struct tevent_req *subreq);
static void auth_do_bind(struct tevent_req *req);
-static void auth_resolve_done(struct tevent_req *subreq);
static void auth_connect_done(struct tevent_req *subreq);
static void auth_bind_user_done(struct tevent_req *subreq);
@@ -659,7 +656,6 @@ static struct tevent_req *auth_send(TALLOC_CTX *memctx,
state->ctx = ctx;
state->username = username;
state->authtok = authtok;
- state->srv = NULL;
if (try_chpass_service && ctx->chpass_service != NULL &&
ctx->chpass_service->name != NULL) {
state->sdap_service = ctx->chpass_service;
@@ -667,7 +663,7 @@ static struct tevent_req *auth_send(TALLOC_CTX *memctx,
state->sdap_service = ctx->service;
}
- if (!auth_get_server(req)) goto fail;
+ if (!auth_connect_send(req)) goto fail;
return req;
@@ -676,75 +672,37 @@ fail:
return NULL;
}
-static struct tevent_req *auth_get_server(struct tevent_req *req)
+static struct tevent_req *auth_connect_send(struct tevent_req *req)
{
- struct tevent_req *next_req;
+ struct tevent_req *subreq;
struct auth_state *state = tevent_req_data(req,
struct auth_state);
-
- /* NOTE: this call may cause service->uri to be refreshed
- * with a new valid server. Do not use service->uri before */
- next_req = be_resolve_server_send(state,
- state->ev,
- state->ctx->be,
- state->sdap_service->name,
- state->srv == NULL ? true : false);
- if (!next_req) {
- DEBUG(SSSDBG_CRIT_FAILURE, "be_resolve_server_send failed.\n");
- return NULL;
- }
-
- tevent_req_set_callback(next_req, auth_resolve_done, req);
- return next_req;
-}
-
-static void auth_resolve_done(struct tevent_req *subreq)
-{
- struct tevent_req *req = tevent_req_callback_data(subreq,
- struct tevent_req);
- struct auth_state *state = tevent_req_data(req,
- struct auth_state);
- int ret;
bool use_tls;
- ret = be_resolve_server_recv(subreq, state, &state->srv);
- talloc_zfree(subreq);
- if (ret) {
- /* all servers have been tried and none
- * was found good, go offline */
- tevent_req_error(req, ETIMEDOUT);
- 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.");
}
- /* Determine whether we need to use TLS */
- if (sdap_is_secure_uri(state->ctx->service->uri)) {
- DEBUG(SSSDBG_TRACE_INTERNAL,
- "[%s] is a secure channel. No need to run START_TLS\n",
- state->ctx->service->uri);
- use_tls = false;
- } else {
+ subreq = sdap_cli_connect_send(state, state->ev, state->ctx->opts,
+ state->ctx->be,
+ state->sdap_service, false,
+ use_tls ? CON_TLS_ON : CON_TLS_OFF, false);
- /* 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,
- state->sdap_service->sockaddr, use_tls);
- if (!subreq) {
+ if (subreq == NULL) {
tevent_req_error(req, ENOMEM);
- return;
+ return NULL;
}
tevent_req_set_callback(subreq, auth_connect_done, req);
+
+ return subreq;
}
static void auth_connect_done(struct tevent_req *subreq)
@@ -755,35 +713,13 @@ static void auth_connect_done(struct tevent_req *subreq)
struct auth_state);
int ret;
- ret = sdap_connect_recv(subreq, state, &state->sh);
+ ret = sdap_cli_connect_recv(subreq, state, NULL, &state->sh, NULL);
talloc_zfree(subreq);
- if (ret) {
- if (state->srv) {
- /* mark this server as bad if connection failed */
- be_fo_set_port_status(state->ctx->be,
- state->sdap_service->name,
- state->srv, PORT_NOT_WORKING);
- }
-
- if (auth_get_server(req) == NULL) {
+ if (ret != EOK) {
+ if (auth_connect_send(req) == NULL) {
tevent_req_error(req, ENOMEM);
}
return;
- } else if (state->srv) {
- be_fo_set_port_status(state->ctx->be, state->sdap_service->name,
- state->srv, PORT_WORKING);
- }
-
- /* In case the ID provider is set to proxy, this might be the first
- * LDAP operation at all, so we need to set the connection status
- */
- if (state->sh->connected == false) {
- ret = sdap_set_connected(state->sh, state->ev);
- if (ret) {
- DEBUG(SSSDBG_OP_FAILURE, "Cannot set connected status\n");
- tevent_req_error(req, ret);
- return;
- }
}
ret = get_user_dn(state, state->ctx->be->domain,
@@ -870,7 +806,7 @@ static void auth_bind_user_done(struct tevent_req *subreq)
break;
case ETIMEDOUT:
case ERR_NETWORK_IO:
- if (auth_get_server(req) == NULL) {
+ if (auth_connect_send(req) == NULL) {
tevent_req_error(req, ENOMEM);
}
return;
--
2.15.1
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