SIST-TP CWA 16926-11:2023

SLOVENSKI STANDARD
SIST-TP CWA 16926-11:2023
01-marec-2023
Specifikacija vmesnika razširitev za finančne storitve (XFS), izdaja 3.50 - 11. del:
Vmesnik razreda naprave v načinu, odvisnem od dobavitelja - Referenca za
programerje
Extensions for Financial Services (XFS) interface specification Release 3.50 - Part 11:
Vendor Dependent Mode Device Class Interface - Programmer's Reference
Ta slovenski standard je istoveten z: CWA 16926-11:2022
ICS:
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
35.240.15 Identifikacijske kartice. Čipne Identification cards. Chip
kartice. Biometrija cards. Biometrics
35.240.40 Uporabniške rešitve IT v IT applications in banking
bančništvu
SIST-TP CWA 16926-11:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CWA 16926-11:2023


CEN
CWA 16926-11

WORKSHOP
December 2022

AGREEMENT


ICS 35.200; 35.240.15; 35.240.40
English version


Extensions for Financial Services (XFS) interface
specification Release 3.50 - Part 11: Vendor Dependent
Mode Device Class Interface - Programmer's Reference
This CEN Workshop Agreement has been drafted and approved by a Workshop of representatives of interested parties, the
constitution of which is indicated in the foreword of this Workshop Agreement.

The formal process followed by the Workshop in the development of this Workshop Agreement has been endorsed by the
National Members of CEN but neither the National Members of CEN nor the CEN-CENELEC Management Centre can be held
accountable for the technical content of this CEN Workshop Agreement or possible conflicts with standards or legislation.

This CEN Workshop Agreement can in no way be held as being an official standard developed by CEN and its Members.

This CEN Workshop Agreement is publicly available as a reference document from the CEN Members National Standard Bodies.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.



EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.


Ref. No.:CWA 16926-11:2022 E

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Table of Contents
European Foreword . 3
1. Introduction . 7
1.1 Background to Release 3.50 . 7
1.2 XFS Service-Specific Programming . 7
2. Vendor Dependent Mode . 9
2.1 VDM Entry triggered by XFS Application . 10
2.2 VDM Entry triggered by Vendor Dependent Switch . 11
2.3 VDM Exit triggered by XFS Application . 12
2.4 VDM Exit triggered by Vendor Dependent Switch . 13
2.5 Controlling / Determining the Active Interface . 14
2.5.1 Vendor Dependent Application independent of the VDM Service Provider .14
2.5.2 Vendor Dependent Application under Control of the VDM Service Provider .15
3. References . 16
4. Info Commands . 17
4.1 WFS_INF_VDM_STATUS . 17
4.2 WFS_INF_VDM_CAPABILITIES . 19
4.3 WFS_INF_VDM_ACTIVE_INTERFACE . 20
5. Execute Commands . 21
5.1 WFS_CMD_VDM_ENTER_MODE_REQ . 21
5.2 WFS_CMD_VDM_ENTER_MODE_ACK . 22
5.3 WFS_CMD_VDM_EXIT_MODE_REQ . 23
5.4 WFS_CMD_VDM_EXIT_MODE_ACK . 24
5.5 WFS_CMD_VDM_SET_ACTIVE_INTERFACE . 25
6. Events . 26
6.1 WFS_SRVE_VDM_ENTER_MODE_REQ . 26
6.2 WFS_SRVE_VDM_EXIT_MODE_REQ. 27
6.3 WFS_SYSE_VDM_MODEENTERED . 28
6.4 WFS_SYSE_VDM_MODEEXITED . 29
6.5 WFS_SRVE_VDM_INTERFACE_CHANGED . 30
7. C-Header file . 31
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European Foreword
This CEN Workshop Agreement has been developed in accordance with the CEN-CENELEC Guide 29
“CEN/CENELEC Workshop Agreements – The way to rapid consensus” and with the relevant provisions of
CEN/CENELEC Internal Regulations - Part 2. It was approved by a Workshop of representatives of interested
parties on 2022-11-08, the constitution of which was supported by CEN following several public calls for
participation, the first of which was made on 1998-06-24. However, this CEN Workshop Agreement does not
necessarily include all relevant stakeholders.
The final text of this CEN Workshop Agreement was provided to CEN for publication on 2022-11-18.
The following organizations and individuals developed and approved this CEN Workshop Agreement:

• AURIGA SPA
• CIMA SPA
• DIEBOLD NIXDORF SYSTEMS GMBH
• FIS BANKING SOLUTIONS UK LTD (OTS)
• FUJITSU TECHNOLOGY SOLUTIONS
• GLORY LTD
• GRG BANKING EQUIPMENT HK CO LTD
• HITACHI CHANNEL SOLUTIONS CORP
• HYOSUNG TNS INC
• JIANGSU GUOGUANG ELECTRONIC INFORMATION TECHNOLOGY
• KAL
• KEBA HANDOVER AUTOMATION GMBH
• NCR FSG
• NEXUS SOFTWARE
• OBERTHUR CASH PROTECTION
• OKI ELECTRIC INDUSTRY SHENZHEN
• SALZBURGER BANKEN SOFTWARE
• SECURE INNOVATION
• SIGMA SPA
It is possible that some elements of this CEN/CWA may be subject to patent rights. The CEN-CENELEC policy on
patent rights is set out in CEN-CENELEC Guide 8 “Guidelines for Implementation of the Common IPR Policy on
Patents (and other statutory intellectual property rights based on inventions)”. CEN shall not be held responsible for
identifying any or all such patent rights.
The Workshop participants have made every effort to ensure the reliability and accuracy of the technical and non-
technical content of CWA 16926-11, but this does not guarantee, either explicitly or implicitly, its correctness.
Users of CWA 16926-11 should be aware that neither the Workshop participants, nor CEN can be held liable for
damages or losses of any kind whatsoever which may arise from its application. Users of CWA 16926-11 do so on
their own responsibility and at their own risk.
The CWA is published as a multi-part document, consisting of:
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CWA 16926-11:2022 (E)
Part 1: Application Programming Interface (API) - Service Provider Interface (SPI) - Programmer's Reference
Part 2: Service Classes Definition - Programmer's Reference
Part 3: Printer and Scanning Device Class Interface - Programmer's Reference
Part 4: Identification Card Device Class Interface - Programmer's Reference
Part 5: Cash Dispenser Device Class Interface - Programmer's Reference
Part 6: PIN Keypad Device Class Interface - Programmer's Reference
Part 7: Check Reader/Scanner Device Class Interface - Programmer's Reference
Part 8: Depository Device Class Interface - Programmer's Reference
Part 9: Text Terminal Unit Device Class Interface - Programmer's Reference
Part 10: Sensors and Indicators Unit Device Class Interface - Programmer's Reference
Part 11: Vendor Dependent Mode Device Class Interface - Programmer's Reference
Part 12: Camera Device Class Interface - Programmer's Reference
Part 13: Alarm Device Class Interface - Programmer's Reference
Part 14: Card Embossing Unit Device Class Interface - Programmer's Reference
Part 15: Cash-In Module Device Class Interface - Programmer's Reference
Part 16: Card Dispenser Device Class Interface - Programmer's Reference
Part 17: Barcode Reader Device Class Interface - Programmer's Reference
Part 18: Item Processing Module Device Class Interface - Programmer's Reference
Part 19: Biometrics Device Class Interface - Programmer's Reference
Parts 20 - 28: Reserved for future use.
Parts 29 through 47 constitute an optional addendum to this CWA. They define the integration between the SNMP
standard and the set of status and statistical information exported by the Service Providers.
Part 29: XFS MIB Architecture and SNMP Extensions - Programmer’s Reference
Part 30: XFS MIB Device Specific Definitions - Printer Device Class
Part 31: XFS MIB Device Specific Definitions - Identification Card Device Class
Part 32: XFS MIB Device Specific Definitions - Cash Dispenser Device Class
Part 33: XFS MIB Device Specific Definitions - PIN Keypad Device Class
Part 34: XFS MIB Device Specific Definitions - Check Reader/Scanner Device Class
Part 35: XFS MIB Device Specific Definitions - Depository Device Class
Part 36: XFS MIB Device Specific Definitions - Text Terminal Unit Device Class
Part 37: XFS MIB Device Specific Definitions - Sensors and Indicators Unit Device Class
Part 38: XFS MIB Device Specific Definitions - Camera Device Class
Part 39: XFS MIB Device Specific Definitions - Alarm Device Class
Part 40: XFS MIB Device Specific Definitions - Card Embossing Unit Class
Part 41: XFS MIB Device Specific Definitions - Cash-In Module Device Class
Part 42: Reserved for future use.
Part 43: XFS MIB Device Specific Definitions - Vendor Dependent Mode Device Class
Part 44: XFS MIB Application Management
Part 45: XFS MIB Device Specific Definitions - Card Dispenser Device Class
Part 46: XFS MIB Device Specific Definitions - Barcode Reader Device Class
Part 47: XFS MIB Device Specific Definitions - Item Processing Module Device Class
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Part 48: XFS MIB Device Specific Definitions - Biometrics Device Class
Parts 49 - 60 are reserved for future use.
Part 61: Application Programming Interface (API) - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Service Provider Interface (SPI) - Programmer's Reference
Part 62: Printer and Scanning Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 63: Identification Card Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 64: Cash Dispenser Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 65: PIN Keypad Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 66: Check Reader/Scanner Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 67: Depository Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 68: Text Terminal Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version
3.50 (this CWA) - Programmer's Reference
Part 69: Sensors and Indicators Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 70: Vendor Dependent Mode Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 71: Camera Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 72: Alarm Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
Part 73: Card Embossing Unit Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 74: Cash-In Module Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 75: Card Dispenser Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 76: Barcode Reader Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50
(this CWA) - Programmer's Reference
Part 77: Item Processing Module Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to
Version 3.50 (this CWA) - Programmer's Reference
Part 78: Biometric Device Class Interface - Migration from Version 3.40 (CWA 16296:2020) to Version 3.50 (this
CWA) - Programmer's Reference
In addition to these Programmer's Reference specifications, the reader of this CWA is also referred to a
complementary document, called Release Notes. The Release Notes contain clarifications and explanations on the
CWA specifications, which are not requiring functional changes. The current version of the Release Notes is
available online from: https://www.cencenelec.eu/areas-of-work/cen-sectors/digital-society-cen/cwa-download-
area/.
The information in this document represents the Workshop's current views on the issues discussed as of the date of
publication. It is provided for informational purposes only and is subject to change without notice. CEN makes no
warranty, express or implied, with respect to this document.


Revision History:
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3.00 October 18, 2000 Initial Release.
3.10 November 29, 2007 For a description of changes from version 3.00 to version
3.10 see the VDM 3.10 Migration document.
3.20 March 2, 2011 For a description of changes from version 3.10 to version
3.20 see the VDM 3.20 Migration document.
3.30 March 19, 2015 For a description of changes from version 3.20 to version
3.30 see the VDM 3.30 Migration document.
3.40 December 06, 2019 For a description of changes from version 3.30 to version
3.40 see the VDM 3.40 Migration document.
3.50 November 18, 2022 For a description of changes from version 3.40 to version
3.50 see the VDM 3.50 Migration document.

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1. Introduction
1.1 Background to Release 3.50
The CEN/XFS Workshop aims to promote a clear and unambiguous specification defining a multi-vendor software
interface to financial peripheral devices. The XFS (eXtensions for Financial Services) specifications are developed
within the CEN (European Committee for Standardization/Information Society Standardization System) Workshop
environment. CEN Workshops aim to arrive at a European consensus on an issue that can be published as a CEN
Workshop Agreement (CWA).
The CEN/XFS Workshop encourages the participation of both banks and vendors in the deliberations required to
create an industry standard. The CEN/XFS Workshop achieves its goals by focused sub-groups working
electronically and meeting quarterly.
Release 3.50 of the XFS specification is based on a C API and is delivered with the continued promise for the
protection of technical investment for existing applications. This release of the specification extends the
functionality and capabilities of the existing devices covered by the specification:
• Addition of E2E security
• PIN Password Entry

1.2 XFS Service-Specific Programming
The service classes are defined by their service-specific commands and the associated data structures, error codes,
messages, etc. These commands are used to request functions that are specific to one or more classes of Service
Providers, but not all of them, and therefore are not included in the common API for basic or administration
functions.
When a service-specific command is common among two or more classes of Service Providers, the syntax of the
command is as similar as possible across all services, since a major objective of XFS is to standardize function
codes and structures for the broadest variety of services. For example, using the WFSExecute function, the
commands to read data from various services are as similar as possible to each other in their syntax and data
structures.
In general, the specific command set for a service class is defined as a superset of the specific capabilities likely to
be provided by the developers of the services of that class; thus any particular device will normally support only a
subset of the defined command set.
There are three cases in which a Service Provider may receive a service-specific command that it does not support:
The requested capability is defined for the class of Service Providers by the XFS specification, the particular vendor
implementation of that service does not support it, and the unsupported capability is not considered to be
fundamental to the service. In this case, the Service Provider returns a successful completion, but does no operation.
An example would be a request from an application to turn on a control indicator on a passbook printer; the Service
Provider recognizes the command, but since the passbook printer it is managing does not include that indicator, the
Service Provider does no operation and returns a successful completion to the application.


The requested capability is defined for the class of Service Providers by the XFS specification, the particular vendor
implementation of that service does not support it, and the unsupported capability is considered to be fundamental
to the service. In this case, a WFS_ERR_UNSUPP_COMMAND error for Execute commands or
WFS_ERR_UNSUPP_CATEGORY error for Info commands is returned to the calling application. An example
would be a request from an application to a cash dispenser to retract items where the dispenser hardware does not
have that capability; the Service Provider recognizes the command but, since the cash dispenser it is managing is
unable to fulfil the request, returns this error.
The requested capability is not defined for the class of Service Providers by the XFS specification. In this case, a
WFS_ERR_INVALID_COMMAND error for Execute commands or WFS_ERR_INVALID_CATEGORY error
for Info commands is returned to the calling application.
This design allows implementation of applications that can be used with a range of services that provide differing
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subsets of the functionalities that are defined for their service class. Applications may use the WFSGetInfo and
WFSAsyncGetInfo commands to inquire about the capabilities of the service they are about to use, and modify
their behavior accordingly, or they may use functions and then deal with error returns to make decisions as to how
to use the service.



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2. Vendor Dependent Mode
This specification describes the functionality of the services provided by the Vendor Dependent Mode (VDM)
Service Provider under XFS, by defining the service-specific commands that can be issued, using the WFSGetInfo,
WFSAsyncGetInfo, WFSExecute and WFSAsyncExecute functions.
In all device classes there needs to be some method of going into a vendor specific mode to allow for capabilities
which go beyond the scope of the current XFS specifications. A typical usage of such a mode might be to handle
some configuration or diagnostic type of function or perhaps perform some 'off-line' testing of the device. These
functions are normally available on Self-Service devices in a mode traditionally referred to as Maintenance Mode
or Supervisor Mode and usually require operator intervention. It is those vendor-specific functions not covered by
(and not required to be covered by) XFS Service Providers that will be available once the device is in Vendor
Dependent Mode.
This service provides the mechanism for switching to and from Vendor Dependent Mode. The VDM Service
Provider can be seen as the central point through which all Enter and Exit VDM requests are synchronized.
Entry into, or exit from, Vendor Dependent Mode can be initiated either by an application or by the VDM Service
Provider itself. If initiated by an application, then this application needs to issue the appropriate command to
request entry or exit. If initiated by the VDM Service Provider i.e. some vendor dependent switch, then these
request commands are in-appropriate and not issued.
Once the entry request has been made, all registered applications will be notified of the entry request by an event
message. These applications must attempt to close all open sessions with XFS Service Providers (except for
specific Service Providers which explicitly allow sessions to remain open) as soon as possible and then issue an
acknowledgement command to the VDM Service Provider when ready. Once all applications have acknowledged,
the VDM Service Provider will issue event messages to these applications to indicate that the System is in Vendor
Dependent Mode.
Similarly, once the exit request has been made all registered applications will be notified of the exit request by an
event message. These applications must then issue an acknowledgement command to the VDM Service Provider
immediately. Once all applications have acknowledged, the VDM Service Provider will issue event messages to
these applications to indicate that the system has exited from Vendor Dependent Mode.
Thus, XFS compliant applications that do not request entry to Vendor Dependent Mode, must comply with the
following:
• Every XFS application should open a session with the VDM Service Provider passing a valid ApplId and
then register for all VDM entry and exit notices.
• Before opening a session with any other XFS Service Provider, check the status of the VDM Service
Provider. If Vendor Dependent Mode is not “Inactive”, do not open a session.
• When getting a VDM entry notice, close all open sessions with all XFS Service Providers which require
sessions to be closed as soon as possible and issue an acknowledgement for the entry to VDM.
• When getting a VDM exit notice, acknowledge at once.
• When getting a VDM exited notice, re-open any required sessions with other XFS Service Providers.
This is mandatory for self-service but optional for branch.
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2.1 VDM Entry triggered by XFS Application

VDM Entry Request





XFS Compliant XFS XFS XFS

VDM Control Compliant Compliant Compliant

Application Application Application Application




CMD_ENTER_MODE_ REQ







SRVE_ENTER_MODE_REQ SYSE_MODEENTERRED



CMD_ENTER_MODE_ACK



 t0 t1  t2      t3    t4   t5   t6      t7

time



VDM SERVICE PROVIDER








SYSTEM

DEVICES



under

Vendor Dependent

control at t > t7


At time t0, status is “Inactive” and a request to Enter VDM arises from within the Application system.
At time t1, an Application Process/Thread/Function issues the CMD_ENTER_MODE_REQ Execute cmd.
Status then becomes “Enter Pending”.
At time t2, the VDM Service Provider issues the SRVE_ENTER_MODE_REQ Event to all registered applications.
At time t3, the VDM Service Provider receives a CMD_ENTER_MODE_ACK Execute command from a XFS
Compliant Application.
At time t4, the VDM Service Provider receives a CMD_ENTER_MODE_ACK Execute command from a XFS
Compliant Application.
At time t5, the VDM Service Provider receives a CMD_ENTER_MODE_ACK Execute command from another
XFS Compliant Application.
At time t6, the VDM Service Provider receives a CMD_ENTER_MODE_ACK Execute command from the last
XFS Compliant Application.
At time t7, the VDM Service Provider issues the SYSE_MODEENTERED Event to all registered applications
Status then becomes “Active”.
The system is now in Vendor Dependent Mode and a Vendor Dependent Application can exclusively use the
system devices in a Vendor Dependent manner.
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2.2 VDM Entry triggered by Vendor Dependent Switch




XFS XFS XFS

Compliant Compliant Compliant

Application Application Application










SRVE_ENTER_MODE_REQ SYSE_MODEENTERRED


CMD_ENTER_MODE_ACK



 t0 t1     t2   t3   t4     t5

time


VDM Entry Request
VDM SERVICE PROVIDER








SYSTEM

DEVICES



under

Vendor Dependent

control at t > t5



At time t0, status is “Inactive” and a request to Enter VDM arises from within the Vendor System.
Status then becomes “Enter Pending”.
At time t1, the VDM Service Provider issues the SRVE_ENTER_MODE_REQ Event to all registered applications.
At time t2, the VDM Service Provider receives a CMD_ENTER_MODE_ACK Execute command from a XFS
Compliant Application.
At time t3, the VDM Service Provider receives a CMD_ENTER_MODE_ACK Execute command from another
XFS Compliant Application.
At time t4, the VDM Service Provider receives a CMD_ENTER_MODE_ACK Execute command from the last
XFS Compliant Application.
At time t5, the VDM Service Provider issues the SYSE_MODEENTERED Event to all registered applications
Status then becomes “Active”.
The system is now in Vendor Dependent Mode and a Vendor Dependent Application can exclusively use the
system devices in a Vendor Dependent manner.
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2.3 VDM Exit triggered by XFS Application



VDM Exit Request




XFS Compliant XFS XFS XFS

VDM Control Compliant Compliant Compliant

Application Application Application Application




CMD_EXIT_MODE_ REQ







SRVE_EXIT_MODE_REQ SYSE_MODEEXITED


CMD_EXIT_MODE_ACK



 t0 t1 t2                   t3 t4 t5 t6       t7

time



VDM SERVICE PROVIDER







SYSTEM

DEVICES



under

CEN/XFS

control at t > t7


At time t0, status is “Active” and a request to Exit VDM arises from within the Application system.
At time t1, an Application Process/Thread/Function issues the CMD_EXIT_MODE_REQ Execute cmd.
Status then becomes “Exit Pending”.
At time t2, the VDM Service Provider issues the SRVE_EXIT_MODE_REQ Event to all registered applications.
At time t3, the VDM Service Provider receives a CMD_EXIT_MODE_ACK Execute command from a XFS
Compliant Application.
At time t4, the VDM Service Provider receives a CMD_EXIT_MODE_ACK Execute command from a XFS
Compliant Application.
At time t5, the VDM Service Provider receives a CMD_EXIT_MODE_ACK Execute command from another XFS
Compliant Application.
At time t6, the VDM Service Provider receives a CMD_EXIT_MODE_ACK Execute command from the last XFS
Compliant Application.
At time t7, the VDM Service Provider issues the SYSE_MODEEXITED Event to all registered applications
Status then becomes “Inactive”.
The system is now no longer in Vendor Dependent Mode and the XFS Compliant Applications can re-open any
required services with other XFS Service Providers.
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2.4 VDM Exit triggered by Vendor Dependent Switch
...