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/*
Unix SMB2 implementation.
Copyright (C) Andrew Bartlett 2001-2005
Copyright (C) Stefan Metzmacher 2005
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 "auth/credentials/credentials.h"
#include "auth/gensec/gensec.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
#include "smb_server/smb_server.h"
#include "smb_server/service_smb_proto.h"
#include "smb_server/smb2/smb2_server.h"
#include "smbd/service_stream.h"
static NTSTATUS smb2srv_negprot_secblob(struct smb2srv_request *req, DATA_BLOB *_blob)
{
struct gensec_security *gensec_security;
DATA_BLOB null_data_blob = data_blob(NULL, 0);
DATA_BLOB blob;
NTSTATUS nt_status;
struct cli_credentials *server_credentials;
nt_status = gensec_server_start(req,
req->smb_conn->connection->event.ctx,
req->smb_conn->connection->msg_ctx,
&gensec_security);
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(0, ("Failed to start GENSEC: %s\n", nt_errstr(nt_status)));
smbsrv_terminate_connection(req->smb_conn, "Failed to start GENSEC\n");
return nt_status;
}
server_credentials = cli_credentials_init(req);
if (!server_credentials) {
smbsrv_terminate_connection(req->smb_conn, "Failed to init server credentials\n");
return NT_STATUS_NO_MEMORY;
}
cli_credentials_set_conf(server_credentials);
nt_status = cli_credentials_set_machine_account(server_credentials);
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(nt_status)));
talloc_free(server_credentials);
server_credentials = NULL;
}
req->smb_conn->negotiate.server_credentials = talloc_steal(req->smb_conn, server_credentials);
gensec_set_target_service(gensec_security, "cifs");
gensec_set_credentials(gensec_security, server_credentials);
nt_status = gensec_start_mech_by_oid(gensec_security, GENSEC_OID_SPNEGO);
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(0, ("Failed to start SPNEGO: %s\n", nt_errstr(nt_status)));
smbsrv_terminate_connection(req->smb_conn, "Failed to start SPNEGO\n");
return nt_status;
}
nt_status = gensec_update(gensec_security, req, null_data_blob, &blob);
if (!NT_STATUS_IS_OK(nt_status) && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
DEBUG(0, ("Failed to get SPNEGO to give us the first token: %s\n", nt_errstr(nt_status)));
smbsrv_terminate_connection(req->smb_conn, "Failed to start SPNEGO - no first token\n");
return nt_status;
}
*_blob = blob;
return NT_STATUS_OK;
}
static NTSTATUS smb2srv_negprot_backend(struct smb2srv_request *req, struct smb2_negprot *io)
{
NTSTATUS status;
struct timeval current_time;
struct timeval boot_time;
req->smb_conn->negotiate.protocol = PROTOCOL_SMB2;
current_time = timeval_current(); /* TODO: handle timezone?! */
boot_time = timeval_current(); /* TODO: fix me */
io->out._pad = 0;
io->out.unknown2 = 0x06;
ZERO_STRUCT(io->out.sessid);
io->out.unknown3 = 0x0d;
io->out.unknown4 = 0x00;
io->out.unknown5 = 0x01;
io->out.unknown6 = 0x01;
io->out.unknown7 = 0x01;
io->out.current_time = timeval_to_nttime(¤t_time);
io->out.boot_time = timeval_to_nttime(&boot_time);
status = smb2srv_negprot_secblob(req, &io->out.secblob);
NT_STATUS_NOT_OK_RETURN(status);
io->out.unknown9 = 0x204d4c20;
return NT_STATUS_OK;
}
static void smb2srv_negprot_send(struct smb2srv_request *req, struct smb2_negprot *io)
{
NTSTATUS status;
if (NT_STATUS_IS_ERR(req->status)) {
smb2srv_send_error(req, req->status); /* TODO: is this correct? */
return;
}
status = smb2srv_setup_reply(req, 0x40, True, io->out.secblob.length);
if (!NT_STATUS_IS_OK(status)) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
talloc_free(req);
return;
}
SSVAL(req->out.body, 0x02, io->out._pad);
SIVAL(req->out.body, 0x04, io->out.unknown2);
memcpy(req->out.body+0x08, io->out.sessid, 16);
SIVAL(req->out.body, 0x18, io->out.unknown3);
SSVAL(req->out.body, 0x1C, io->out.unknown4);
SIVAL(req->out.body, 0x1E, io->out.unknown5);
SIVAL(req->out.body, 0x22, io->out.unknown6);
SSVAL(req->out.body, 0x26, io->out.unknown7);
push_nttime(req->out.body, 0x28, io->out.current_time);
push_nttime(req->out.body, 0x30, io->out.boot_time);
status = smb2_push_o16s16_blob(&req->out, 0x38, io->out.secblob);
if (!NT_STATUS_IS_OK(status)) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
talloc_free(req);
return;
}
SIVAL(req->out.body, 0x3C, io->out.unknown9);
smb2srv_send_reply(req);
}
void smb2srv_negprot_recv(struct smb2srv_request *req)
{
struct smb2_negprot *io;
if (req->in.body_size < 0x26) {
smb2srv_send_error(req, NT_STATUS_FOOBAR);
return;
}
io = talloc(req, struct smb2_negprot);
if (!io) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(NT_STATUS_NO_MEMORY));
talloc_free(req);
return;
}
io->in.unknown1 = SVAL(req->in.body, 0x02);
memcpy(io->in.unknown2, req->in.body + 0x04, 0x20);
io->in.unknown3 = SVAL(req->in.body, 0x24);
req->status = smb2srv_negprot_backend(req, io);
if (req->control_flags & SMB2SRV_REQ_CTRL_FLAG_NOT_REPLY) {
talloc_free(req);
return;
}
smb2srv_negprot_send(req, io);
}
/*
* reply to a SMB negprot request with dialect "SMB 2.001"
*/
void smb2srv_reply_smb_negprot(struct smbsrv_request *smb_req)
{
struct smb2srv_request *req;
uint32_t body_fixed_size = 0x26;
/* create a fake SMB2 negprot request */
req = talloc_zero(smb_req->smb_conn, struct smb2srv_request);
if (!req) goto nomem;
req->smb_conn = smb_req->smb_conn;
req->request_time = smb_req->request_time;
talloc_steal(req, smb_req);
req->in.size = NBT_HDR_SIZE+SMB2_HDR_BODY+body_fixed_size;
req->in.allocated = req->in.size;
req->in.buffer = talloc_size(req, req->in.allocated);
if (!req->in.buffer) goto nomem;
req->in.hdr = req->in.buffer + NBT_HDR_SIZE;
req->in.body = req->in.hdr + SMB2_HDR_BODY;
req->in.body_size = body_fixed_size;
req->in.dynamic = NULL;
SIVAL(req->in.hdr, 0, SMB2_MAGIC);
SSVAL(req->in.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
SSVAL(req->in.hdr, SMB2_HDR_PAD1, 0);
SIVAL(req->in.hdr, SMB2_HDR_STATUS, 0);
SSVAL(req->in.hdr, SMB2_HDR_OPCODE, SMB2_OP_NEGPROT);
SSVAL(req->in.hdr, SMB2_HDR_UNKNOWN1, 0);
SIVAL(req->in.hdr, SMB2_HDR_FLAGS, 0);
SIVAL(req->in.hdr, SMB2_HDR_CHAIN_OFFSET, 0);
SBVAL(req->in.hdr, SMB2_HDR_SEQNUM, 0);
SIVAL(req->in.hdr, SMB2_HDR_PID, 0);
SIVAL(req->in.hdr, SMB2_HDR_TID, 0);
SBVAL(req->in.hdr, SMB2_HDR_UID, 0);
memset(req->in.hdr+SMB2_HDR_SIG, 0, 16);
/* this seems to be a bug, they use 0x24 but the length is 0x26 */
SSVAL(req->in.body, 0x00, 0x24);
SSVAL(req->in.body, 0x02, 1);
memset(req->in.body+0x04, 0, 32);
SSVAL(req->in.body, 0x24, 0);
smb2srv_negprot_recv(req);
return;
nomem:
smbsrv_terminate_connection(smb_req->smb_conn, nt_errstr(NT_STATUS_NO_MEMORY));
talloc_free(req);
return;
}
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