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Diffstat (limited to 'source4/ldap_server/ldap_bind.c')
-rw-r--r--source4/ldap_server/ldap_bind.c317
1 files changed, 317 insertions, 0 deletions
diff --git a/source4/ldap_server/ldap_bind.c b/source4/ldap_server/ldap_bind.c
new file mode 100644
index 0000000000..f37ef31c0a
--- /dev/null
+++ b/source4/ldap_server/ldap_bind.c
@@ -0,0 +1,317 @@
+/*
+ Unix SMB/CIFS implementation.
+ LDAP server
+ Copyright (C) Stefan Metzmacher 2004
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "ldap_server/ldap_server.h"
+#include "auth/auth.h"
+#include "libcli/ldap/ldap.h"
+#include "smbd/service.h"
+#include "lib/ldb/include/ldb.h"
+#include "lib/ldb/include/ldb_errors.h"
+#include "dsdb/samdb/samdb.h"
+#include "auth/gensec/gensec.h"
+#include "param/param.h"
+
+static NTSTATUS ldapsrv_BindSimple(struct ldapsrv_call *call)
+{
+ struct ldap_BindRequest *req = &call->request->r.BindRequest;
+ struct ldapsrv_reply *reply;
+ struct ldap_BindResponse *resp;
+
+ int result;
+ const char *errstr;
+ const char *nt4_domain, *nt4_account;
+
+ struct auth_session_info *session_info;
+
+ NTSTATUS status;
+
+ DEBUG(10, ("BindSimple dn: %s\n",req->dn));
+
+ status = crack_auto_name_to_nt4_name(call, call->conn->connection->event.ctx, call->conn->lp_ctx, req->dn, &nt4_domain, &nt4_account);
+ if (NT_STATUS_IS_OK(status)) {
+ status = authenticate_username_pw(call,
+ call->conn->connection->event.ctx,
+ call->conn->connection->msg_ctx,
+ call->conn->lp_ctx,
+ nt4_domain, nt4_account,
+ req->creds.password,
+ &session_info);
+ }
+
+ reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
+ if (!reply) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (NT_STATUS_IS_OK(status)) {
+ result = LDAP_SUCCESS;
+ errstr = NULL;
+
+ talloc_free(call->conn->session_info);
+ call->conn->session_info = session_info;
+ talloc_steal(call->conn, session_info);
+
+ /* don't leak the old LDB */
+ talloc_free(call->conn->ldb);
+
+ status = ldapsrv_backend_Init(call->conn);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ result = LDAP_OPERATIONS_ERROR;
+ errstr = talloc_asprintf(reply, "Simple Bind: Failed to advise ldb new credentials: %s", nt_errstr(status));
+ }
+ } else {
+ status = auth_nt_status_squash(status);
+
+ result = LDAP_INVALID_CREDENTIALS;
+ errstr = talloc_asprintf(reply, "Simple Bind Failed: %s", nt_errstr(status));
+ }
+
+ resp = &reply->msg->r.BindResponse;
+ resp->response.resultcode = result;
+ resp->response.errormessage = errstr;
+ resp->response.dn = NULL;
+ resp->response.referral = NULL;
+ resp->SASL.secblob = NULL;
+
+ ldapsrv_queue_reply(call, reply);
+ return NT_STATUS_OK;
+}
+
+struct ldapsrv_sasl_context {
+ struct ldapsrv_connection *conn;
+ struct socket_context *sasl_socket;
+};
+
+static void ldapsrv_set_sasl(void *private)
+{
+ struct ldapsrv_sasl_context *ctx = talloc_get_type(private, struct ldapsrv_sasl_context);
+ talloc_steal(ctx->conn->connection, ctx->sasl_socket);
+ talloc_unlink(ctx->conn->connection, ctx->conn->connection->socket);
+
+ ctx->conn->sockets.sasl = ctx->sasl_socket;
+ ctx->conn->connection->socket = ctx->sasl_socket;
+ packet_set_socket(ctx->conn->packet, ctx->conn->connection->socket);
+}
+
+static NTSTATUS ldapsrv_BindSASL(struct ldapsrv_call *call)
+{
+ struct ldap_BindRequest *req = &call->request->r.BindRequest;
+ struct ldapsrv_reply *reply;
+ struct ldap_BindResponse *resp;
+ struct ldapsrv_connection *conn;
+ int result = 0;
+ const char *errstr=NULL;
+ NTSTATUS status = NT_STATUS_OK;
+
+ DEBUG(10, ("BindSASL dn: %s\n",req->dn));
+
+ reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
+ if (!reply) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ resp = &reply->msg->r.BindResponse;
+
+ conn = call->conn;
+
+ /*
+ * TODO: a SASL bind with a different mechanism
+ * should cancel an inprogress SASL bind.
+ * (see RFC 4513)
+ */
+
+ if (!conn->gensec) {
+ conn->session_info = NULL;
+
+ status = gensec_server_start(conn,
+ conn->connection->event.ctx,
+ conn->lp_ctx,
+ conn->connection->msg_ctx,
+ &conn->gensec);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
+ result = LDAP_OPERATIONS_ERROR;
+ errstr = talloc_asprintf(reply, "SASL: Failed to start authentication system: %s",
+ nt_errstr(status));
+ } else {
+
+ gensec_set_target_service(conn->gensec, "ldap");
+
+ gensec_set_credentials(conn->gensec, conn->server_credentials);
+
+ gensec_want_feature(conn->gensec, GENSEC_FEATURE_SIGN);
+ gensec_want_feature(conn->gensec, GENSEC_FEATURE_SEAL);
+ gensec_want_feature(conn->gensec, GENSEC_FEATURE_ASYNC_REPLIES);
+
+ status = gensec_start_mech_by_sasl_name(conn->gensec, req->creds.SASL.mechanism);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Failed to start GENSEC SASL[%s] server code: %s\n",
+ req->creds.SASL.mechanism, nt_errstr(status)));
+ result = LDAP_OPERATIONS_ERROR;
+ errstr = talloc_asprintf(reply, "SASL:[%s]: Failed to start authentication backend: %s",
+ req->creds.SASL.mechanism, nt_errstr(status));
+ }
+ }
+ }
+
+ if (NT_STATUS_IS_OK(status)) {
+ DATA_BLOB input = data_blob(NULL, 0);
+ DATA_BLOB output = data_blob(NULL, 0);
+
+ if (req->creds.SASL.secblob) {
+ input = *req->creds.SASL.secblob;
+ }
+
+ resp->SASL.secblob = talloc(reply, DATA_BLOB);
+ NT_STATUS_HAVE_NO_MEMORY(resp->SASL.secblob);
+
+ status = gensec_update(conn->gensec, reply,
+ input, &output);
+
+ /* Windows 2000 mmc doesn't like secblob == NULL and reports a decoding error */
+ resp->SASL.secblob = talloc(reply, DATA_BLOB);
+ NT_STATUS_HAVE_NO_MEMORY(resp->SASL.secblob);
+ *resp->SASL.secblob = output;
+ } else {
+ resp->SASL.secblob = NULL;
+ }
+
+ if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
+ result = LDAP_SASL_BIND_IN_PROGRESS;
+ errstr = NULL;
+ } else if (NT_STATUS_IS_OK(status)) {
+ struct auth_session_info *old_session_info=NULL;
+ struct ldapsrv_sasl_context *ctx;
+
+ result = LDAP_SUCCESS;
+ errstr = NULL;
+
+ ctx = talloc(call, struct ldapsrv_sasl_context);
+
+ if (!ctx) {
+ status = NT_STATUS_NO_MEMORY;
+ } else {
+ ctx->conn = conn;
+ status = gensec_socket_init(conn->gensec,
+ conn->connection->socket,
+ conn->connection->event.ctx,
+ stream_io_handler_callback,
+ conn->connection,
+ &ctx->sasl_socket);
+ }
+
+ if (!ctx || !NT_STATUS_IS_OK(status)) {
+ conn->session_info = old_session_info;
+ result = LDAP_OPERATIONS_ERROR;
+ errstr = talloc_asprintf(reply,
+ "SASL:[%s]: Failed to setup SASL socket: %s",
+ req->creds.SASL.mechanism, nt_errstr(status));
+ } else {
+
+ call->send_callback = ldapsrv_set_sasl;
+ call->send_private = ctx;
+
+ old_session_info = conn->session_info;
+ conn->session_info = NULL;
+ status = gensec_session_info(conn->gensec, &conn->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ conn->session_info = old_session_info;
+ result = LDAP_OPERATIONS_ERROR;
+ errstr = talloc_asprintf(reply,
+ "SASL:[%s]: Failed to get session info: %s",
+ req->creds.SASL.mechanism, nt_errstr(status));
+ } else {
+ talloc_free(old_session_info);
+ talloc_steal(conn, conn->session_info);
+
+ /* don't leak the old LDB */
+ talloc_free(conn->ldb);
+
+ status = ldapsrv_backend_Init(conn);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ result = LDAP_OPERATIONS_ERROR;
+ errstr = talloc_asprintf(reply,
+ "SASL:[%s]: Failed to advise samdb of new credentials: %s",
+ req->creds.SASL.mechanism,
+ nt_errstr(status));
+ }
+ }
+ }
+ } else {
+ status = auth_nt_status_squash(status);
+ if (result == 0) {
+ result = LDAP_INVALID_CREDENTIALS;
+ errstr = talloc_asprintf(reply, "SASL:[%s]: %s", req->creds.SASL.mechanism, nt_errstr(status));
+ }
+ }
+
+ resp->response.resultcode = result;
+ resp->response.dn = NULL;
+ resp->response.errormessage = errstr;
+ resp->response.referral = NULL;
+
+ ldapsrv_queue_reply(call, reply);
+ return NT_STATUS_OK;
+}
+
+NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
+{
+ struct ldap_BindRequest *req = &call->request->r.BindRequest;
+ struct ldapsrv_reply *reply;
+ struct ldap_BindResponse *resp;
+
+ /*
+ * TODO: we should fail the bind request
+ * if there're any pending requests.
+ *
+ * also a simple bind should cancel an
+ * inprogress SASL bind.
+ * (see RFC 4513)
+ */
+ switch (req->mechanism) {
+ case LDAP_AUTH_MECH_SIMPLE:
+ return ldapsrv_BindSimple(call);
+ case LDAP_AUTH_MECH_SASL:
+ return ldapsrv_BindSASL(call);
+ }
+
+ reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
+ if (!reply) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ resp = &reply->msg->r.BindResponse;
+ resp->response.resultcode = 7;
+ resp->response.dn = NULL;
+ resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
+ resp->response.referral = NULL;
+ resp->SASL.secblob = NULL;
+
+ ldapsrv_queue_reply(call, reply);
+ return NT_STATUS_OK;
+}
+
+NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
+{
+ DEBUG(10, ("UnbindRequest\n"));
+ return NT_STATUS_OK;
+}
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