static void smbd_smb2_request_read_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint8_t out_data_offset;
	DATA_BLOB out_data_buffer = data_blob_null;
	uint32_t out_data_remaining = 0;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_read_recv(subreq,
				     req,
				     &out_data_buffer,
				     &out_data_remaining);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	out_data_offset = SMB2_HDR_BODY + 0x10;

	outbody = smbd_smb2_generate_outbody(req, 0x10);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x10 + 1);	/* struct size */
	SCVAL(outbody.data, 0x02,
	      out_data_offset);			/* data offset */
	SCVAL(outbody.data, 0x03, 0);		/* reserved */
	SIVAL(outbody.data, 0x04,
	      out_data_buffer.length);		/* data length */
	SIVAL(outbody.data, 0x08,
	      out_data_remaining);		/* data remaining */
	SIVAL(outbody.data, 0x0C, 0);		/* reserved */

	outdyn = out_data_buffer;

	error = smbd_smb2_request_done(req, outbody, &outdyn);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->xconn,
						 nt_errstr(error));
		return;
	}
}
예제 #2
0
static void smbd_smb2_request_find_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint16_t out_output_buffer_offset;
	DATA_BLOB out_output_buffer = data_blob_null;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_query_directory_recv(subreq,
				     req,
				     &out_output_buffer);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	out_output_buffer_offset = SMB2_HDR_BODY + 0x08;

	outbody = smbd_smb2_generate_outbody(req, 0x08);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x08 + 1);	/* struct size */
	SSVAL(outbody.data, 0x02,
	      out_output_buffer_offset);	/* output buffer offset */
	SIVAL(outbody.data, 0x04,
	      out_output_buffer.length);	/* output buffer length */

	DEBUG(10,("smbd_smb2_request_find_done: out_output_buffer.length = %u\n",
		(unsigned int)out_output_buffer.length ));

	outdyn = out_output_buffer;

	error = smbd_smb2_request_done(req, outbody, &outdyn);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->xconn,
						 nt_errstr(error));
		return;
	}
}
static void smbd_smb2_request_write_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint32_t out_count = 0;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_write_recv(subreq, &out_count);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	outbody = smbd_smb2_generate_outbody(req, 0x10);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x10 + 1);	/* struct size */
	SSVAL(outbody.data, 0x02, 0);		/* reserved */
	SIVAL(outbody.data, 0x04, out_count);	/* count */
	SIVAL(outbody.data, 0x08, 0);		/* remaining */
	SSVAL(outbody.data, 0x0C, 0);		/* write channel info offset */
	SSVAL(outbody.data, 0x0E, 0);		/* write channel info length */

	outdyn = data_blob_const(NULL, 0);

	error = smbd_smb2_request_done(req, outbody, &outdyn);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->xconn, nt_errstr(error));
		return;
	}
}
예제 #4
0
static void smbd_smb2_request_flush_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	DATA_BLOB outbody;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_flush_recv(subreq);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	outbody = smbd_smb2_generate_outbody(req, 0x04);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x04);	/* struct size */
	SSVAL(outbody.data, 0x02, 0);		/* reserved */

	error = smbd_smb2_request_done(req, outbody, NULL);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->xconn,
						 nt_errstr(error));
		return;
	}
}
예제 #5
0
NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req)
{
	DATA_BLOB outbody;
	NTSTATUS status;

	status = smbd_smb2_request_verify_sizes(req, 0x04);
	if (!NT_STATUS_IS_OK(status)) {
		return smbd_smb2_request_error(req, status);
	}

	/* TODO: update some time stamps */

	outbody = smbd_smb2_generate_outbody(req, 0x04);
	if (outbody.data == NULL) {
		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
	}

	SSVAL(outbody.data, 0x00, 0x04);	/* struct size */
	SSVAL(outbody.data, 0x02, 0);		/* reserved */

	return smbd_smb2_request_done(req, outbody, NULL);
}
예제 #6
0
static void smbd_smb2_request_close_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req =
		tevent_req_callback_data(subreq,
		struct smbd_smb2_request);
	DATA_BLOB outbody;
	uint16_t out_flags = 0;
	connection_struct *conn = req->tcon->compat;
	struct timespec out_creation_ts = { 0, };
	struct timespec out_last_access_ts = { 0, };
	struct timespec out_last_write_ts = { 0, };
	struct timespec out_change_ts = { 0, };
	uint64_t out_allocation_size = 0;
	uint64_t out_end_of_file = 0;
	uint32_t out_file_attributes = 0;
	NTSTATUS status;
	NTSTATUS error;

	status = smbd_smb2_close_recv(subreq,
				      &out_flags,
				      &out_creation_ts,
				      &out_last_access_ts,
				      &out_last_write_ts,
				      &out_change_ts,
				      &out_allocation_size,
				      &out_end_of_file,
				      &out_file_attributes);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	outbody = smbd_smb2_generate_outbody(req, 0x3C);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x3C);	/* struct size */
	SSVAL(outbody.data, 0x02, out_flags);
	SIVAL(outbody.data, 0x04, 0);		/* reserved */
	put_long_date_timespec(conn->ts_res,
		(char *)outbody.data + 0x08, out_creation_ts);
	put_long_date_timespec(conn->ts_res,
		(char *)outbody.data + 0x10, out_last_access_ts);
	put_long_date_timespec(conn->ts_res,
		(char *)outbody.data + 0x18, out_last_write_ts);
	put_long_date_timespec(conn->ts_res,
		(char *)outbody.data + 0x20, out_change_ts);
	SBVAL(outbody.data, 0x28, out_allocation_size);
	SBVAL(outbody.data, 0x30, out_end_of_file);
	SIVAL(outbody.data, 0x38, out_file_attributes);

	error = smbd_smb2_request_done(req, outbody, NULL);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->xconn,
						 nt_errstr(error));
		return;
	}
}
예제 #7
0
static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *smb2req =
		tevent_req_callback_data(subreq,
		struct smbd_smb2_request);
	uint8_t *outhdr;
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint16_t out_session_flags = 0;
	uint64_t out_session_id = 0;
	uint16_t out_security_offset;
	DATA_BLOB out_security_buffer = data_blob_null;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_session_setup_wrap_recv(subreq,
						   &out_session_flags,
						   smb2req,
						   &out_security_buffer,
						   &out_session_id);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status) &&
	    !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
		status = nt_status_squash(status);
		error = smbd_smb2_request_error(smb2req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(smb2req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	out_security_offset = SMB2_HDR_BODY + 0x08;

	outhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);

	outbody = smbd_smb2_generate_outbody(smb2req, 0x08);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(smb2req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);

	SSVAL(outbody.data, 0x00, 0x08 + 1);	/* struct size */
	SSVAL(outbody.data, 0x02,
	      out_session_flags);		/* session flags */
	SSVAL(outbody.data, 0x04,
	      out_security_offset);		/* security buffer offset */
	SSVAL(outbody.data, 0x06,
	      out_security_buffer.length);	/* security buffer length */

	outdyn = out_security_buffer;

	error = smbd_smb2_request_done_ex(smb2req, status, outbody, &outdyn,
					   __location__);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(smb2req->xconn,
						 nt_errstr(error));
		return;
	}
}
예제 #8
0
static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint16_t out_output_buffer_offset;
	DATA_BLOB out_output_buffer = data_blob_null;
	NTSTATUS status;
	NTSTATUS call_status = NT_STATUS_OK;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_getinfo_recv(subreq,
					req,
					&out_output_buffer,
					&call_status);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	/* some GetInfo responses set STATUS_BUFFER_OVERFLOW and return partial,
	   but valid data */
	if (!(NT_STATUS_IS_OK(call_status) ||
	      NT_STATUS_EQUAL(call_status, STATUS_BUFFER_OVERFLOW))) {
		/* Return a specific error with data. */
		error = smbd_smb2_request_error_ex(req,
						call_status,
						&out_output_buffer,
						__location__);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	out_output_buffer_offset = SMB2_HDR_BODY + 0x08;

	outbody = smbd_smb2_generate_outbody(req, 0x08);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x08 + 1);	/* struct size */
	SSVAL(outbody.data, 0x02,
	      out_output_buffer_offset);	/* output buffer offset */
	SIVAL(outbody.data, 0x04,
	      out_output_buffer.length);	/* output buffer length */

	outdyn = out_output_buffer;

	error = smbd_smb2_request_done_ex(req, call_status, outbody, &outdyn, __location__);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->sconn,
						 nt_errstr(error));
		return;
	}
}
예제 #9
0
파일: smb2_negprot.c 프로젝트: aixoss/samba
NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req)
{
	struct smbXsrv_connection *xconn = req->xconn;
	NTSTATUS status;
	const uint8_t *inbody;
	const uint8_t *indyn = NULL;
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	DATA_BLOB negprot_spnego_blob;
	uint16_t security_offset;
	DATA_BLOB security_buffer;
	size_t expected_dyn_size = 0;
	size_t c;
	uint16_t security_mode;
	uint16_t dialect_count;
	uint16_t in_security_mode;
	uint32_t in_capabilities;
	DATA_BLOB in_guid_blob;
	struct GUID in_guid;
	struct smb2_negotiate_contexts in_c = { .num_contexts = 0, };
	struct smb2_negotiate_context *in_preauth = NULL;
	struct smb2_negotiate_context *in_cipher = NULL;
	struct smb2_negotiate_contexts out_c = { .num_contexts = 0, };
	DATA_BLOB out_negotiate_context_blob = data_blob_null;
	uint32_t out_negotiate_context_offset = 0;
	uint16_t out_negotiate_context_count = 0;
	uint16_t dialect = 0;
	uint32_t capabilities;
	DATA_BLOB out_guid_blob;
	struct GUID out_guid;
	enum protocol_types protocol = PROTOCOL_NONE;
	uint32_t max_limit;
	uint32_t max_trans = lp_smb2_max_trans();
	uint32_t max_read = lp_smb2_max_read();
	uint32_t max_write = lp_smb2_max_write();
	NTTIME now = timeval_to_nttime(&req->request_time);
	bool signing_required = true;
	bool ok;

	status = smbd_smb2_request_verify_sizes(req, 0x24);
	if (!NT_STATUS_IS_OK(status)) {
		return smbd_smb2_request_error(req, status);
	}
	inbody = SMBD_SMB2_IN_BODY_PTR(req);

	dialect_count = SVAL(inbody, 0x02);

	in_security_mode = SVAL(inbody, 0x04);
	in_capabilities = IVAL(inbody, 0x08);
	in_guid_blob = data_blob_const(inbody + 0x0C, 16);

	if (dialect_count == 0) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	status = GUID_from_ndr_blob(&in_guid_blob, &in_guid);
	if (!NT_STATUS_IS_OK(status)) {
		return smbd_smb2_request_error(req, status);
	}

	expected_dyn_size = dialect_count * 2;
	if (SMBD_SMB2_IN_DYN_LEN(req) < expected_dyn_size) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}
	indyn = SMBD_SMB2_IN_DYN_PTR(req);

	protocol = smbd_smb2_protocol_dialect_match(indyn,
					dialect_count,
					&dialect);

	for (c=0; protocol == PROTOCOL_NONE && c < dialect_count; c++) {
		if (lp_server_max_protocol() < PROTOCOL_SMB2_10) {
			break;
		}

		dialect = SVAL(indyn, c*2);
		if (dialect == SMB2_DIALECT_REVISION_2FF) {
			if (xconn->smb2.allow_2ff) {
				xconn->smb2.allow_2ff = false;
				protocol = PROTOCOL_SMB2_10;
				break;
			}
		}
	}

	if (protocol == PROTOCOL_NONE) {
		return smbd_smb2_request_error(req, NT_STATUS_NOT_SUPPORTED);
	}

	if (protocol >= PROTOCOL_SMB3_10) {
		uint32_t in_negotiate_context_offset = 0;
		uint16_t in_negotiate_context_count = 0;
		DATA_BLOB in_negotiate_context_blob = data_blob_null;
		size_t ofs;

		in_negotiate_context_offset = IVAL(inbody, 0x1C);
		in_negotiate_context_count = SVAL(inbody, 0x20);

		ofs = SMB2_HDR_BODY;
		ofs += SMBD_SMB2_IN_BODY_LEN(req);
		ofs += expected_dyn_size;
		if ((ofs % 8) != 0) {
			ofs += 8 - (ofs % 8);
		}

		if (in_negotiate_context_offset != ofs) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}

		ofs -= SMB2_HDR_BODY;
		ofs -= SMBD_SMB2_IN_BODY_LEN(req);

		if (SMBD_SMB2_IN_DYN_LEN(req) < ofs) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}

		in_negotiate_context_blob = data_blob_const(indyn,
						SMBD_SMB2_IN_DYN_LEN(req));

		in_negotiate_context_blob.data += ofs;
		in_negotiate_context_blob.length -= ofs;

		status = smb2_negotiate_context_parse(req,
					in_negotiate_context_blob, &in_c);
		if (!NT_STATUS_IS_OK(status)) {
			return smbd_smb2_request_error(req, status);
		}

		if (in_negotiate_context_count != in_c.num_contexts) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}
	}

	if ((dialect != SMB2_DIALECT_REVISION_2FF) &&
	    (protocol >= PROTOCOL_SMB2_10) &&
	    !GUID_all_zero(&in_guid))
	{
		ok = remote_arch_cache_update(&in_guid);
		if (!ok) {
			return smbd_smb2_request_error(
				req, NT_STATUS_UNSUCCESSFUL);
		}
	}

	switch (get_remote_arch()) {
	case RA_VISTA:
	case RA_SAMBA:
	case RA_CIFSFS:
	case RA_OSX:
		break;
	default:
		set_remote_arch(RA_VISTA);
		break;
	}

	fstr_sprintf(remote_proto, "SMB%X_%02X",
		     (dialect >> 8) & 0xFF, dialect & 0xFF);

	reload_services(req->sconn, conn_snum_used, true);
	DEBUG(3,("Selected protocol %s\n", remote_proto));

	in_preauth = smb2_negotiate_context_find(&in_c,
					SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
	if (protocol >= PROTOCOL_SMB3_10 && in_preauth == NULL) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}
	in_cipher = smb2_negotiate_context_find(&in_c,
					SMB2_ENCRYPTION_CAPABILITIES);

	/* negprot_spnego() returns a the server guid in the first 16 bytes */
	negprot_spnego_blob = negprot_spnego(req, xconn);
	if (negprot_spnego_blob.data == NULL) {
		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
	}

	if (negprot_spnego_blob.length < 16) {
		return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
	}

	security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
	/*
	 * We use xconn->smb1.signing_state as that's already present
	 * and used lpcfg_server_signing_allowed() to get the correct
	 * defaults, e.g. signing_required for an ad_dc.
	 */
	signing_required = smb_signing_is_mandatory(xconn->smb1.signing_state);
	if (signing_required) {
		security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
	}

	capabilities = 0;
	if (lp_host_msdfs()) {
		capabilities |= SMB2_CAP_DFS;
	}

	if (protocol >= PROTOCOL_SMB2_10 &&
	    lp_smb2_leases() &&
	    lp_oplocks(GLOBAL_SECTION_SNUM) &&
	    !lp_kernel_oplocks(GLOBAL_SECTION_SNUM))
	{
		capabilities |= SMB2_CAP_LEASING;
	}

	if ((protocol >= PROTOCOL_SMB2_24) &&
	    (lp_smb_encrypt(-1) != SMB_SIGNING_OFF) &&
	    (in_capabilities & SMB2_CAP_ENCRYPTION)) {
		capabilities |= SMB2_CAP_ENCRYPTION;
	}

	/*
	 * 0x10000 (65536) is the maximum allowed message size
	 * for SMB 2.0
	 */
	max_limit = 0x10000;

	if (protocol >= PROTOCOL_SMB2_10) {
		int p = 0;

		if (tsocket_address_is_inet(req->sconn->local_address, "ip")) {
			p = tsocket_address_inet_port(req->sconn->local_address);
		}

		/* largeMTU is not supported over NBT (tcp port 139) */
		if (p != NBT_SMB_PORT) {
			capabilities |= SMB2_CAP_LARGE_MTU;
			xconn->smb2.credits.multicredit = true;

			/*
			 * We allow up to almost 16MB.
			 *
			 * The maximum PDU size is 0xFFFFFF (16776960)
			 * and we need some space for the header.
			 */
			max_limit = 0xFFFF00;
		}
	}

	/*
	 * the defaults are 8MB, but we'll limit this to max_limit based on
	 * the dialect (64kb for SMB 2.0, 8MB for SMB >= 2.1 with LargeMTU)
	 *
	 * user configured values exceeding the limits will be overwritten,
	 * only smaller values will be accepted
	 */

	max_trans = MIN(max_limit, lp_smb2_max_trans());
	max_read = MIN(max_limit, lp_smb2_max_read());
	max_write = MIN(max_limit, lp_smb2_max_write());

	if (in_preauth != NULL) {
		size_t needed = 4;
		uint16_t hash_count;
		uint16_t salt_length;
		uint16_t selected_preauth = 0;
		const uint8_t *p;
		uint8_t buf[38];
		DATA_BLOB b;
		size_t i;

		if (in_preauth->data.length < needed) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}

		hash_count = SVAL(in_preauth->data.data, 0);
		salt_length = SVAL(in_preauth->data.data, 2);

		if (hash_count == 0) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}

		p = in_preauth->data.data + needed;
		needed += hash_count * 2;
		needed += salt_length;

		if (in_preauth->data.length < needed) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}

		for (i=0; i < hash_count; i++) {
			uint16_t v;

			v = SVAL(p, 0);
			p += 2;

			if (v == SMB2_PREAUTH_INTEGRITY_SHA512) {
				selected_preauth = v;
				break;
			}
		}

		if (selected_preauth == 0) {
			return smbd_smb2_request_error(req,
				NT_STATUS_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAP);
		}

		SSVAL(buf, 0,  1); /* HashAlgorithmCount */
		SSVAL(buf, 2, 32); /* SaltLength */
		SSVAL(buf, 4, selected_preauth);
		generate_random_buffer(buf + 6, 32);

		b = data_blob_const(buf, sizeof(buf));
		status = smb2_negotiate_context_add(req, &out_c,
					SMB2_PREAUTH_INTEGRITY_CAPABILITIES, b);
		if (!NT_STATUS_IS_OK(status)) {
			return smbd_smb2_request_error(req, status);
		}

		req->preauth = &req->xconn->smb2.preauth;
	}

	if (in_cipher != NULL) {
		size_t needed = 2;
		uint16_t cipher_count;
		const uint8_t *p;
		uint8_t buf[4];
		DATA_BLOB b;
		size_t i;
		bool aes_128_ccm_supported = false;
		bool aes_128_gcm_supported = false;

		capabilities &= ~SMB2_CAP_ENCRYPTION;

		if (in_cipher->data.length < needed) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}

		cipher_count = SVAL(in_cipher->data.data, 0);

		if (cipher_count == 0) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}

		p = in_cipher->data.data + needed;
		needed += cipher_count * 2;

		if (in_cipher->data.length < needed) {
			return smbd_smb2_request_error(req,
					NT_STATUS_INVALID_PARAMETER);
		}

		for (i=0; i < cipher_count; i++) {
			uint16_t v;

			v = SVAL(p, 0);
			p += 2;

			if (v == SMB2_ENCRYPTION_AES128_GCM) {
				aes_128_gcm_supported = true;
			}
			if (v == SMB2_ENCRYPTION_AES128_CCM) {
				aes_128_ccm_supported = true;
			}
		}

		/*
		 * For now we preferr CCM because our implementation
		 * is faster than GCM, see bug #11451.
		 */
		if (aes_128_ccm_supported) {
			xconn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
		} else if (aes_128_gcm_supported) {
			xconn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_GCM;
		}

		SSVAL(buf, 0, 1); /* ChiperCount */
		SSVAL(buf, 2, xconn->smb2.server.cipher);

		b = data_blob_const(buf, sizeof(buf));
		status = smb2_negotiate_context_add(req, &out_c,
					SMB2_ENCRYPTION_CAPABILITIES, b);
		if (!NT_STATUS_IS_OK(status)) {
			return smbd_smb2_request_error(req, status);
		}
	}

	if (capabilities & SMB2_CAP_ENCRYPTION) {
		xconn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
	}

	if (protocol >= PROTOCOL_SMB2_22 &&
	    xconn->client->server_multi_channel_enabled)
	{
		if (in_capabilities & SMB2_CAP_MULTI_CHANNEL) {
			capabilities |= SMB2_CAP_MULTI_CHANNEL;
		}
	}

	security_offset = SMB2_HDR_BODY + 0x40;

#if 1
	/* Try SPNEGO auth... */
	security_buffer = data_blob_const(negprot_spnego_blob.data + 16,
					  negprot_spnego_blob.length - 16);
#else
	/* for now we want raw NTLMSSP */
	security_buffer = data_blob_const(NULL, 0);
#endif

	if (out_c.num_contexts != 0) {
		status = smb2_negotiate_context_push(req,
						&out_negotiate_context_blob,
						out_c);
		if (!NT_STATUS_IS_OK(status)) {
			return smbd_smb2_request_error(req, status);
		}
	}

	if (out_negotiate_context_blob.length != 0) {
		static const uint8_t zeros[8];
		size_t pad = 0;
		size_t ofs;

		outdyn = data_blob_dup_talloc(req, security_buffer);
		if (outdyn.length != security_buffer.length) {
			return smbd_smb2_request_error(req,
						NT_STATUS_NO_MEMORY);
		}

		ofs = security_offset + security_buffer.length;
		if ((ofs % 8) != 0) {
			pad = 8 - (ofs % 8);
		}
		ofs += pad;

		ok = data_blob_append(req, &outdyn, zeros, pad);
		if (!ok) {
			return smbd_smb2_request_error(req,
						NT_STATUS_NO_MEMORY);
		}

		ok = data_blob_append(req, &outdyn,
				      out_negotiate_context_blob.data,
				      out_negotiate_context_blob.length);
		if (!ok) {
			return smbd_smb2_request_error(req,
						NT_STATUS_NO_MEMORY);
		}

		out_negotiate_context_offset = ofs;
		out_negotiate_context_count = out_c.num_contexts;
	} else {
		outdyn = security_buffer;
	}

	out_guid_blob = data_blob_const(negprot_spnego_blob.data, 16);
	status = GUID_from_ndr_blob(&out_guid_blob, &out_guid);
	if (!NT_STATUS_IS_OK(status)) {
		return smbd_smb2_request_error(req, status);
	}

	outbody = smbd_smb2_generate_outbody(req, 0x40);
	if (outbody.data == NULL) {
		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
	}

	SSVAL(outbody.data, 0x00, 0x40 + 1);	/* struct size */
	SSVAL(outbody.data, 0x02,
	      security_mode);			/* security mode */
	SSVAL(outbody.data, 0x04, dialect);	/* dialect revision */
	SSVAL(outbody.data, 0x06,
	      out_negotiate_context_count);	/* reserved/NegotiateContextCount */
	memcpy(outbody.data + 0x08,
	       out_guid_blob.data, 16);	/* server guid */
	SIVAL(outbody.data, 0x18,
	      capabilities);			/* capabilities */
	SIVAL(outbody.data, 0x1C, max_trans);	/* max transact size */
	SIVAL(outbody.data, 0x20, max_read);	/* max read size */
	SIVAL(outbody.data, 0x24, max_write);	/* max write size */
	SBVAL(outbody.data, 0x28, now);		/* system time */
	SBVAL(outbody.data, 0x30, 0);		/* server start time */
	SSVAL(outbody.data, 0x38,
	      security_offset);			/* security buffer offset */
	SSVAL(outbody.data, 0x3A,
	      security_buffer.length);		/* security buffer length */
	SIVAL(outbody.data, 0x3C,
	      out_negotiate_context_offset);	/* reserved/NegotiateContextOffset */

	req->sconn->using_smb2 = true;

	if (dialect != SMB2_DIALECT_REVISION_2FF) {
		struct smbXsrv_client_global0 *global0 = NULL;

		status = smbXsrv_connection_init_tables(xconn, protocol);
		if (!NT_STATUS_IS_OK(status)) {
			return smbd_smb2_request_error(req, status);
		}

		xconn->smb2.client.capabilities = in_capabilities;
		xconn->smb2.client.security_mode = in_security_mode;
		xconn->smb2.client.guid = in_guid;
		xconn->smb2.client.num_dialects = dialect_count;
		xconn->smb2.client.dialects = talloc_array(xconn,
							   uint16_t,
							   dialect_count);
		if (xconn->smb2.client.dialects == NULL) {
			return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		}
		for (c=0; c < dialect_count; c++) {
			xconn->smb2.client.dialects[c] = SVAL(indyn, c*2);
		}

		xconn->smb2.server.capabilities = capabilities;
		xconn->smb2.server.security_mode = security_mode;
		xconn->smb2.server.guid = out_guid;
		xconn->smb2.server.dialect = dialect;
		xconn->smb2.server.max_trans = max_trans;
		xconn->smb2.server.max_read  = max_read;
		xconn->smb2.server.max_write = max_write;

		if (xconn->protocol < PROTOCOL_SMB2_10) {
			/*
			 * SMB2_02 doesn't support client guids
			 */
			return smbd_smb2_request_done(req, outbody, &outdyn);
		}

		if (!xconn->client->server_multi_channel_enabled) {
			/*
			 * Only deal with the client guid database
			 * if multi-channel is enabled.
			 */
			return smbd_smb2_request_done(req, outbody, &outdyn);
		}

		if (xconn->smb2.client.guid_verified) {
			/*
			 * The connection was passed from another
			 * smbd process.
			 */
			return smbd_smb2_request_done(req, outbody, &outdyn);
		}

		status = smb2srv_client_lookup_global(xconn->client,
						xconn->smb2.client.guid,
						req, &global0);
		/*
		 * TODO: check for races...
		 */
		if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECTID_NOT_FOUND)) {
			/*
			 * This stores the new client information in
			 * smbXsrv_client_global.tdb
			 */
			xconn->client->global->client_guid =
						xconn->smb2.client.guid;
			status = smbXsrv_client_update(xconn->client);
			if (!NT_STATUS_IS_OK(status)) {
				return status;
			}

			xconn->smb2.client.guid_verified = true;
		} else if (NT_STATUS_IS_OK(status)) {
			status = smb2srv_client_connection_pass(req,
								global0);
			if (!NT_STATUS_IS_OK(status)) {
				return smbd_smb2_request_error(req, status);
			}

			smbd_server_connection_terminate(xconn,
							 "passed connection");
			return NT_STATUS_OBJECTID_EXISTS;
		} else {
			return smbd_smb2_request_error(req, status);
		}
	}

	return smbd_smb2_request_done(req, outbody, &outdyn);
}
예제 #10
0
static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
{
	struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
					struct smbd_smb2_request);
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint8_t out_oplock_level = 0;
	uint32_t out_create_action = 0;
	connection_struct *conn = smb2req->tcon->compat;
	struct timespec out_creation_ts = { 0, };
	struct timespec out_last_access_ts = { 0, };
	struct timespec out_last_write_ts = { 0, };
	struct timespec out_change_ts = { 0, };
	uint64_t out_allocation_size = 0;
	uint64_t out_end_of_file = 0;
	uint32_t out_file_attributes = 0;
	uint64_t out_file_id_persistent = 0;
	uint64_t out_file_id_volatile = 0;
	struct smb2_create_blobs out_context_blobs;
	DATA_BLOB out_context_buffer;
	uint16_t out_context_buffer_offset = 0;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_create_recv(tsubreq,
				       smb2req,
				       &out_oplock_level,
				       &out_create_action,
				       &out_creation_ts,
				       &out_last_access_ts,
				       &out_last_write_ts,
				       &out_change_ts,
				       &out_allocation_size,
				       &out_end_of_file,
				       &out_file_attributes,
				       &out_file_id_persistent,
				       &out_file_id_volatile,
				       &out_context_blobs);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(smb2req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(smb2req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(smb2req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(smb2req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	if (out_context_buffer.length > 0) {
		out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
	}

	outbody = smbd_smb2_generate_outbody(smb2req, 0x58);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(smb2req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x58 + 1);	/* struct size */
	SCVAL(outbody.data, 0x02,
	      out_oplock_level);		/* oplock level */
	SCVAL(outbody.data, 0x03, 0);		/* reserved */
	SIVAL(outbody.data, 0x04,
	      out_create_action);		/* create action */
	put_long_date_timespec(conn->ts_res,
	      (char *)outbody.data + 0x08,
	      out_creation_ts);			/* creation time */
	put_long_date_timespec(conn->ts_res,
	      (char *)outbody.data + 0x10,
	      out_last_access_ts);		/* last access time */
	put_long_date_timespec(conn->ts_res,
	      (char *)outbody.data + 0x18,
	      out_last_write_ts);		/* last write time */
	put_long_date_timespec(conn->ts_res,
	      (char *)outbody.data + 0x20,
	      out_change_ts);			/* change time */
	SBVAL(outbody.data, 0x28,
	      out_allocation_size);		/* allocation size */
	SBVAL(outbody.data, 0x30,
	      out_end_of_file);			/* end of file */
	SIVAL(outbody.data, 0x38,
	      out_file_attributes);		/* file attributes */
	SIVAL(outbody.data, 0x3C, 0);		/* reserved */
	SBVAL(outbody.data, 0x40,
	      out_file_id_persistent);		/* file id (persistent) */
	SBVAL(outbody.data, 0x48,
	      out_file_id_volatile);		/* file id (volatile) */
	SIVAL(outbody.data, 0x50,
	      out_context_buffer_offset);	/* create contexts offset */
	SIVAL(outbody.data, 0x54,
	      out_context_buffer.length);	/* create contexts length */

	outdyn = out_context_buffer;

	error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(smb2req->xconn,
						 nt_errstr(error));
		return;
	}
}
예제 #11
0
static void smbd_smb2_request_tcon_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req =
		tevent_req_callback_data(subreq,
		struct smbd_smb2_request);
	uint8_t *outhdr;
	DATA_BLOB outbody;
	uint8_t out_share_type = 0;
	uint32_t out_share_flags = 0;
	uint32_t out_capabilities = 0;
	uint32_t out_maximal_access = 0;
	uint32_t out_tree_id = 0;
	NTSTATUS status;
	NTSTATUS error;

	status = smbd_smb2_tree_connect_recv(subreq,
					     &out_share_type,
					     &out_share_flags,
					     &out_capabilities,
					     &out_maximal_access,
					     &out_tree_id);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	outhdr = SMBD_SMB2_OUT_HDR_PTR(req);

	outbody = smbd_smb2_generate_outbody(req, 0x10);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->sconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SIVAL(outhdr, SMB2_HDR_TID, out_tree_id);

	SSVAL(outbody.data, 0x00, 0x10);	/* struct size */
	SCVAL(outbody.data, 0x02,
	      out_share_type);			/* share type */
	SCVAL(outbody.data, 0x03, 0);		/* reserved */
	SIVAL(outbody.data, 0x04,
	      out_share_flags);			/* share flags */
	SIVAL(outbody.data, 0x08,
	      out_capabilities);		/* capabilities */
	SIVAL(outbody.data, 0x0C,
	      out_maximal_access);		/* maximal access */

	error = smbd_smb2_request_done(req, outbody, NULL);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->sconn,
						 nt_errstr(error));
		return;
	}
}
예제 #12
0
static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	const uint8_t *inbody;
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint32_t in_ctl_code;
	uint64_t in_file_id_persistent;
	uint64_t in_file_id_volatile;
	uint32_t out_input_offset;
	uint32_t out_output_offset;
	DATA_BLOB out_output_buffer = data_blob_null;
	NTSTATUS status;
	NTSTATUS error; /* transport error */
	bool disconnect = false;

	status = smbd_smb2_ioctl_recv(subreq, req,
				      &out_output_buffer,
				      &disconnect);

	DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
		"%u status %s\n",
		(unsigned int)out_output_buffer.length,
		nt_errstr(status) ));

	TALLOC_FREE(subreq);
	if (disconnect) {
		error = status;
		smbd_server_connection_terminate(req->xconn,
						 nt_errstr(error));
		return;
	}

	inbody = SMBD_SMB2_IN_BODY_PTR(req);

	in_ctl_code		= IVAL(inbody, 0x04);
	in_file_id_persistent	= BVAL(inbody, 0x08);
	in_file_id_volatile	= BVAL(inbody, 0x10);

	if (smbd_smb2_ioctl_is_failure(in_ctl_code, status,
				       out_output_buffer.length)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	out_input_offset = SMB2_HDR_BODY + 0x30;
	out_output_offset = SMB2_HDR_BODY + 0x30;

	outbody = smbd_smb2_generate_outbody(req, 0x30);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->xconn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x30 + 1);	/* struct size */
	SSVAL(outbody.data, 0x02, 0);		/* reserved */
	SIVAL(outbody.data, 0x04,
	      in_ctl_code);			/* ctl code */
	SBVAL(outbody.data, 0x08,
	      in_file_id_persistent);		/* file id (persistent) */
	SBVAL(outbody.data, 0x10,
	      in_file_id_volatile);		/* file id (volatile) */
	SIVAL(outbody.data, 0x18,
	      out_input_offset);		/* input offset */
	SIVAL(outbody.data, 0x1C, 0);		/* input count */
	SIVAL(outbody.data, 0x20,
	      out_output_offset);		/* output offset */
	SIVAL(outbody.data, 0x24,
	      out_output_buffer.length);	/* output count */
	SIVAL(outbody.data, 0x28, 0);		/* flags */
	SIVAL(outbody.data, 0x2C, 0);		/* reserved */

	/*
	 * Note: Windows Vista and 2008 send back also the
	 *       input from the request. But it was fixed in
	 *       Windows 7.
	 */
	outdyn = out_output_buffer;

	error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
					  __location__);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->xconn,
						 nt_errstr(error));
		return;
	}
}