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/*
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#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/socket.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_dn_to_nt4_name(call, req->dn, &nt4_domain, &nt4_account);
if (NT_STATUS_IS_OK(status)) {
status = authenticate_username_pw(call, 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;
}
static void ldapsrv_set_sasl(void *private)
{
struct ldapsrv_connection *conn = talloc_get_type(private, struct ldapsrv_connection);
struct socket_context *socket = gensec_socket_init(conn->gensec,
conn->connection->socket,
conn->connection->event.ctx,
stream_io_handler_callback,
conn->connection);
if (socket) {
conn->connection->socket = socket;
talloc_steal(conn->connection->socket, socket);
packet_set_socket(conn->packet, socket);
} else {
ldapsrv_terminate_connection(conn, "Failed to setup SASL wrapping on 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;
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;
if (!conn->gensec) {
conn->session_info = NULL;
status = gensec_server_start(conn, &conn->gensec,
conn->connection->event.ctx);
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);
/* TODO: gensec should really handle the difference between NULL and length=0 better! */
if (output.data) {
resp->SASL.secblob = talloc(reply, DATA_BLOB);
NT_STATUS_HAVE_NO_MEMORY(resp->SASL.secblob);
*resp->SASL.secblob = output;
} else {
resp->SASL.secblob = NULL;
}
} 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;
result = LDAP_SUCCESS;
errstr = NULL;
call->send_callback = ldapsrv_set_sasl;
call->send_private = conn;
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;
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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