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authorSumit Bose <sbose@redhat.com>2010-10-21 18:23:15 +0200
committerStephen Gallagher <sgallagh@redhat.com>2010-10-27 09:08:14 -0400
commitbfb9e9c08d9cd830963fbf5e65a23ef673c82258 (patch)
treeea180e88c8395d429c3017abcb1b33f52a3bf7c4 /src/providers/ldap/sdap_async_connection.c
parent0c9607cb162e77b94c62dab954163f2a4eb11caf (diff)
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Allow authentication for referrals
Diffstat (limited to 'src/providers/ldap/sdap_async_connection.c')
-rw-r--r--src/providers/ldap/sdap_async_connection.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/src/providers/ldap/sdap_async_connection.c b/src/providers/ldap/sdap_async_connection.c
index f73f34e1..fbbec182 100644
--- a/src/providers/ldap/sdap_async_connection.c
+++ b/src/providers/ldap/sdap_async_connection.c
@@ -48,6 +48,15 @@ errno_t deref_string_to_val(const char *str, int *val)
/* ==Connect-to-LDAP-Server=============================================== */
+struct sdap_rebind_proc_params {
+ struct sdap_options *opts;
+ struct sdap_handle *sh;
+ bool use_start_tls;
+};
+
+static int sdap_rebind_proc(LDAP *ldap, LDAP_CONST char *url, ber_tag_t request,
+ ber_int_t msgid, void *params);
+
struct sdap_connect_state {
struct tevent_context *ev;
struct sdap_options *opts;
@@ -81,6 +90,7 @@ struct tevent_req *sdap_connect_send(TALLOC_CTX *memctx,
bool ldap_referrals;
const char *ldap_deref;
int ldap_deref_val;
+ struct sdap_rebind_proc_params *rebind_proc_params;
req = tevent_req_create(memctx, &state, struct sdap_connect_state);
if (!req) return NULL;
@@ -150,6 +160,27 @@ struct tevent_req *sdap_connect_send(TALLOC_CTX *memctx,
goto fail;
}
+ if (ldap_referrals) {
+ rebind_proc_params = talloc_zero(state->sh,
+ struct sdap_rebind_proc_params);
+ if (rebind_proc_params == NULL) {
+ DEBUG(1, ("talloc_zero failed.\n"));
+ ret = ENOMEM;
+ goto fail;
+ }
+
+ rebind_proc_params->opts = opts;
+ rebind_proc_params->sh = state->sh;
+ rebind_proc_params->use_start_tls = use_start_tls;
+
+ lret = ldap_set_rebind_proc(state->sh->ldap, sdap_rebind_proc,
+ rebind_proc_params);
+ if (lret != LDAP_SUCCESS) {
+ DEBUG(1, ("ldap_set_rebind_proc failed.\n"));
+ goto fail;
+ }
+ }
+
/* Set alias dereferencing */
ldap_deref = dp_opt_get_string(opts->basic, SDAP_DEREF);
if (ldap_deref != NULL) {
@@ -1427,3 +1458,165 @@ int sdap_cli_connect_recv_ext(struct tevent_req *req,
return EOK;
}
+static int synchronous_tls_setup(LDAP *ldap)
+{
+ int lret;
+ int optret;
+ int ldaperr;
+ int msgid;
+ char *errmsg = NULL;
+ LDAPMessage *result;
+
+ DEBUG(4, ("Executing START TLS\n"));
+
+ lret = ldap_start_tls(ldap, NULL, NULL, &msgid);
+ if (lret != LDAP_SUCCESS) {
+ optret = ldap_get_option(ldap, SDAP_DIAGNOSTIC_MESSAGE, (void*)&errmsg);
+ if (optret == LDAP_SUCCESS) {
+ DEBUG(3, ("ldap_start_tls failed: [%s] [%s]\n",
+ ldap_err2string(lret), errmsg));
+ sss_log(SSS_LOG_ERR, "Could not start TLS. %s", errmsg);
+ ldap_memfree(errmsg);
+ } else {
+ DEBUG(3, ("ldap_start_tls failed: [%s]\n", ldap_err2string(lret)));
+ sss_log(SSS_LOG_ERR, "Could not start TLS. "
+ "Check for certificate issues.");
+ }
+ return lret;
+ }
+
+ lret = ldap_result(ldap, msgid, 1, NULL, &result);
+ if (lret != LDAP_RES_EXTENDED) {
+ DEBUG(2, ("Unexpected ldap_result, expected [%d] got [%d].\n",
+ LDAP_RES_EXTENDED, lret));
+ return LDAP_PARAM_ERROR;
+ }
+
+ lret = ldap_parse_result(ldap, result, &ldaperr, NULL, &errmsg, NULL, NULL,
+ 0);
+ if (lret != LDAP_SUCCESS) {
+ DEBUG(2, ("ldap_parse_result failed (%d) [%d][%s]\n", msgid, lret,
+ ldap_err2string(lret)));
+ return lret;
+ }
+
+ DEBUG(3, ("START TLS result: %s(%d), %s\n",
+ ldap_err2string(ldaperr), ldaperr, errmsg));
+ ldap_memfree(errmsg);
+
+ if (ldap_tls_inplace(ldap)) {
+ DEBUG(9, ("SSL/TLS handler already in place.\n"));
+ return LDAP_SUCCESS;
+ }
+
+ lret = ldap_install_tls(ldap);
+ if (lret != LDAP_SUCCESS) {
+
+ optret = ldap_get_option(ldap, SDAP_DIAGNOSTIC_MESSAGE, (void*)&errmsg);
+ if (optret == LDAP_SUCCESS) {
+ DEBUG(3, ("ldap_install_tls failed: [%s] [%s]\n",
+ ldap_err2string(lret), errmsg));
+ sss_log(SSS_LOG_ERR, "Could not start TLS encryption. %s", errmsg);
+ ldap_memfree(errmsg);
+ } else {
+ DEBUG(3, ("ldap_install_tls failed: [%s]\n",
+ ldap_err2string(lret)));
+ sss_log(SSS_LOG_ERR, "Could not start TLS encryption. "
+ "Check for certificate issues.");
+ }
+
+ return lret;
+ }
+
+ return LDAP_SUCCESS;
+}
+
+static int sdap_rebind_proc(LDAP *ldap, LDAP_CONST char *url, ber_tag_t request,
+ ber_int_t msgid, void *params)
+{
+ struct sdap_rebind_proc_params *p = talloc_get_type(params,
+ struct sdap_rebind_proc_params);
+ const char *sasl_mech;
+ const char *user_dn;
+ struct berval password = {0, NULL};
+ LDAPControl **request_controls = NULL;
+ LDAPControl *ctrls[2] = { NULL, NULL };
+ TALLOC_CTX *tmp_ctx = NULL;
+ struct sasl_bind_state *sasl_bind_state;
+ int ret;
+
+ if (p->use_start_tls) {
+ ret = synchronous_tls_setup(ldap);
+ if (ret != EOK) {
+ DEBUG(1, ("synchronous_tls_setup failed.\n"));
+ return ret;
+ }
+ }
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) {
+ DEBUG(1, ("talloc_new failed.\n"));
+ return LDAP_NO_MEMORY;
+ }
+
+ sasl_mech = dp_opt_get_string(p->opts->basic, SDAP_SASL_MECH);
+
+ if (sasl_mech == NULL) {
+ ret = sdap_control_create(p->sh, LDAP_CONTROL_PASSWORDPOLICYREQUEST,
+ 0, NULL, 0, &ctrls[0]);
+ if (ret != LDAP_SUCCESS && ret != LDAP_NOT_SUPPORTED) {
+ DEBUG(1, ("sdap_control_create failed to create "
+ "Password Policy control.\n"));
+ goto done;
+ }
+ request_controls = ctrls;
+
+ user_dn = dp_opt_get_string(p->opts->basic, SDAP_DEFAULT_BIND_DN);
+ if (user_dn != NULL) {
+ ret = sdap_auth_get_authtok(tmp_ctx,
+ dp_opt_get_string(p->opts->basic,
+ SDAP_DEFAULT_AUTHTOK_TYPE),
+ dp_opt_get_blob(p->opts->basic,
+ SDAP_DEFAULT_AUTHTOK),
+ &password);
+ if (ret != EOK) {
+ DEBUG(1, ("sdap_auth_get_authtok failed.\n"));
+ ret = LDAP_LOCAL_ERROR;
+ goto done;
+ }
+ }
+
+ ret = ldap_sasl_bind_s(ldap, user_dn, LDAP_SASL_SIMPLE, &password,
+ request_controls, NULL, NULL);
+ if (ret != LDAP_SUCCESS) {
+ DEBUG(1, ("ldap_sasl_bind_s failed (%d)[%s]\n", ret,
+ ldap_err2string(ret)));
+ }
+ } else {
+ sasl_bind_state = talloc_zero(tmp_ctx, struct sasl_bind_state);
+ if (sasl_bind_state == NULL) {
+ DEBUG(1, ("talloc_zero failed.\n"));
+ ret = LDAP_NO_MEMORY;
+ goto done;
+ }
+ sasl_bind_state->sasl_user = dp_opt_get_string(p->opts->basic,
+ SDAP_SASL_AUTHID);
+ ret = ldap_sasl_interactive_bind_s(ldap, NULL,
+ sasl_mech, NULL, NULL,
+ LDAP_SASL_QUIET,
+ (*sdap_sasl_interact),
+ sasl_bind_state);
+ if (ret != LDAP_SUCCESS) {
+ DEBUG(1, ("ldap_sasl_interactive_bind_s failed (%d)[%s]\n", ret,
+ ldap_err2string(ret)));
+ }
+ }
+
+ DEBUG(7, ("%s bind to [%s].\n",
+ (ret == LDAP_SUCCESS ? "Successfully" : "Failed to"), url));
+
+done:
+ talloc_free(tmp_ctx);
+
+ return ret;
+}