CCID协议V1.1：智能卡接口设备的USB智能卡CCID规范

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CCID协议v1.1，全称为"Smart-CardIntegratedCircuit(s) Card Interface Devices (ICC) Universal Serial Bus (USB) Device Class - Smart Card CCID Specification for Integrated Circuit(s) Cards Interface Devices Revision 1.1"，发布于2005年4月22日。这个协议是针对智能卡（Smart-Card）与通用串行总线（USB）设备间交互的规范，旨在提供一种标准化的接口，使得ICC能够与各种USB设备无缝连接和通信。该版本1.1的核心目标是确保智能卡在USB环境下能高效、安全地工作，支持各种类型的智能卡应用，如金融交易、身份验证等。CCID规范定义了设备类（Device Class）、命令集、数据传输格式以及错误处理机制，以便制造商和开发者可以依据此标准设计和实现智能卡读写器或相关硬件设备。 CCID协议的重要部分包括： 1. **接口定义**：它详细描述了ICC与USB主机之间的物理接口和电气特性，确保兼容性和互操作性。 2. **命令和数据格式**：协议规定了智能卡通信时使用的命令集，以及数据包结构，这对于驱动程序和应用程序的开发至关重要。 3. **安全特性**：考虑到智能卡处理敏感信息的特性，CCID协议强调了数据加密、认证和错误检测机制，以保障用户隐私和交易安全。 4. **兼容性保证**：通过遵循CCID 1.1标准，制造商可以确保他们的产品能够被广泛接受并在各种支持CCID的设备上正常运行。 5. **知识产权声明**：协议明确指出，该文档是"AS IS"提供的，不附带任何明示或暗示的保证，包括适销性、特定用途适用性或其他任何权利，同时也提醒读者在实施协议中的信息时可能涉及的专利权问题，以及作者对由此引发的侵权责任的免责声明。 6. **贡献者名单**：Bob Nathan来自NCR公司，Stephen Chas等人也参与了该规范的编写，他们的贡献有助于协议的完善和行业标准的建立。 CCID协议v1.1是智能卡技术与USB技术结合的关键规范，对于智能卡在现代计算机系统中的广泛应用起到了重要作用，促进了跨平台的通信和安全交互。

DWG Smart-Card Integrated Circuit(s) Card Interface Devices

4 Standard USB Descriptors

4.1 Device

It is a standard device descriptor as per Chapter 9, “USB Device Framework,” in the

Universal Serial Bus Specification.

It does not contain class-specific information.

4.2 Configuration

It is a standard configuration descriptor as per Chapter 9, “USB Device Framework,” in

the Universal Serial Bus Specification.

It does not contain class-specific information.

4.3 Interface

The Interface descriptor contains the class, subclass, and protocol as per table Table

4.3-1.

Table 4.3-1 Interface Descriptor

Offset Field Size Value Description

0 bLength 1 09h Size of this descriptor in bytes.

1 bDescriptorType 1 04h INTERFACE descriptor type.

2 bInterfaceNumber 1 Number Number of this interface. Zero-based value identifying the index in

the array of concurrent interfaces supported by this configuration.

3 bAlternateSetting 1 Number Value used to select this alternate setting for the interface

identified in the prior field.

4 bNumEndpoints 1 02h

03h

Number of endpoints used by this interface (excluding endpoint

zero).

For Integrated Circuit(s) Cards Interface Devices (CCID)

02h uses bulk-IN and bulk-OUT

03h uses bulk-IN, bulk-OUT and interrupt –IN

5 bInterfaceClass 1 0Bh Smart Card Device Class.

6 bInterfaceSubClass 1 00h Subclass code.

7 bInterfaceProtocol 1

00h

Protocol code

For Integrated Circuit(s) Cards Interface Devices (CCID)

00h

Note: For competitiveness, values 01h and 02h are reserved for

Integrated Circuit(s) Cards Devices (USB-ICC) and other values

are reserved for future use. USB-ICCs are out of the scope of this

specification.

8 iInterface 1 Index Index of string descriptor this interface.

Page 16 of 123 CCID Rev 1.1

DWG Smart-Card Integrated Circuit(s) Card Interface Devices

Offset Field Size Value Description

18 bNumClockSupported 1 The number of clock frequencies that are supported by

the CCID. If the value is 00h, the supported clock

frequencies are assumed to be the default clock

frequency defined by dwDefaultClock and the maximum

clock frequency defined by dwMaximumClock.

The reader must implement the command

PC_to_RDR_SetDataRateAndClockFrequency if more

than one clock frequency is supported.

19 dwDataRate 4 Default ICC I/O data rate in bps. This is an integer value

Example: 9600 bps is encoded as the integer value

9600. (00002580h)

23 dwMaxDataRate 4 Maximum supported ICC I/O data rate in bps

Example: 115.2Kbps is encoded as the integer value

115200. (0001C200h)

27 bNumDataRatesSupported 1 The number of data rates that are supported by the CCID.

If the value is 00h, all data rates between the default data

rate dwDataRate and the maximum data rate

dwMaxDataRate are supported. Those values comply

with § 1.2 and with all clock frequencies supported by the

reader. See offset 18 and

GET_CLOCK_FREQUENCIES § 5.3.2.

28 dwMaxIFSD 4 • Indicates the maximum IFSD supported by CCID for

protocol T=1.

32 dwSynchProtocols 4 RRRR

PPPP

00000000h

• RRRR-Upper Word- is RFU = 0000h

• PPPP-Lower Word- encodes the supported protocol

types. A ‘1’ in a given bit position indicates support

for the associated protocol.

0001h indicates support for the 2-wire protocol

0002h indicates support for the 3-wire protocol

0004h indicates support for the I2C protocol

All other values are outside of this specification, and

must be handled by vendor-supplied drivers.

36 dwMechanical 4 00000000h,

00000008h

The value is a bitwise OR operation performed on the

following values:

• 00000000h No special characteristics

• 00000001h Card accept mechanism

• 00000002h Card ejection mechanism

• 00000004h Card capture mechanism

• 00000008h Card lock/unlock mechanism

This release of the specification does not support devices with the 2-wire, 3-wire, and

I2C protocol so PPPP = 0000h. This field is intended to be forward compatible with the

PCSC specification.

These mechanisms of the dwMechanical parameter have been included for

completeness; however, these functions of motorized CCIDs are not covered by this

release of the specification. A future release may attempt to standardize the interface to

these mechanical functions.

Page 18 of 123 CCID Rev 1.1

DWG Smart-Card Integrated Circuit(s) Card Interface Devices

Offset Field Size Value Description

40 dwFeatures 4 xxxxxxxxh This value indicates what intelligent features the CCID has. The value

is a bitwise OR operation performed on the following values:

• 00000000h No special characteristics

• 00000002h Automatic parameter configuration based on ATR

data

• 00000004h Automatic activation of ICC on inserting

• 00000008h Automatic ICC voltage selection

• 00000010h Automatic ICC clock frequency change

according to active parameters provided by the Host or self

determined

• 00000020h

Automatic baud rate change according to active

parameters provided by the Host or self determined

• 00000040h

Automatic parameters negotiation made by the

CCID (use of warm or cold resets or PPS according to a

manufacturer proprietary algorithm to select the communication

parameters with the ICC)

• 00000080h

Automatic PPS made by the CCID according to the

active parameters

• 00000100h CCID can set ICC in clock stop mode

• 00000200h NAD value other than 00 accepted (T=1 protocol in

use)

• 00000400h Automatic IFSD exchange as first exchange (T=1

protocol in use)

Only one of the following values may be present to select a level of

exhange:

• 00010000h TPDU level exchanges with CCID

• 00020000h Short APDU level exchange with CCID

• 00040000h Short and Extended APDU level exchange with CCID

• If none of those values is indicated the level of exchange is

character.

Only one of the values 00000040h and 00000080h may be present.

When value 00000040h is present the host shall not try to change the

FI, DI, and protocol currently selected.

When an APDU level for exchanges is selected, one of the values

00000040h or 00000080h must be present, as well as the value

00000002h.

To support selective suspend:

• 00100000h USB Wake up signaling supported on card insertion

and removal

When bit 20

, as shown above, is set bit D5 in bmAttributes of the

Standard Configuration Descriptor must be set to 1.

When a CCID doesn't declare the value 00000010h the frequency must be made via

the manufacturer proprietary PC_to_RDR_Escape command, same thing for the baud

rate when the value 00000020h is not declared.

When a CCID using TPDU exchange level declares neither of the values 00000040h,

or 00000080h, the PPS exchange must be made using a TPDU for PPS exchange.

CCID Rev 1.1 Page 19 of 123

DWG Smart-Card Integrated Circuit(s) Card Interface Devices

Offset Field Size Value Description

44 dwMaxCCIDMessageLength 4 For extended APDU level the value shall be between 261 + 10

(header) and 65544 +10, otherwise the minimum value is the

wMaxPacketSize of the Bulk-OUT endpoint.

48 bClassGetResponse 1 Significant only for CCID that offers an APDU level for

exchanges.

Indicates the default class value used by the CCID when it

sends a Get Response command to perform the transportation

of an APDU by T=0 protocol.

Value FFh indicates that the CCID echoes the class of the

APDU.

49 bClassEnvelope 1 Significant only for CCID that offers an extended APDU level

for exchanges.

Indicates the default class value used by the CCID when it

sends an Envelope command to perform the transportation of

an extended APDU by T=0 protocol.

Value FFh indicates that the CCID echoes the class of the

APDU.

50 wLcdLayout 2 XXYYh Number of lines and characters for the LCD display used to

send messages for PIN entry.

XX: number of lines

YY: number of characters per line.

XXYY=0000h no LCD.

52 bPINSupport 1 00h-03h This value indicates what PIN support features the CCID has.

The value is a bitwise OR operation performed on the following

values:

01h PIN Verification supported

02h PIN Modification supported

53 bMaxCCIDBusySlots 1 01h-FFh Maximum number

of slots which can be simultaneously busy.

5.2 CCID Endpoints

A CCID shall support a minimum of two endpoints in addition to the default (control)

endpoint: one bulk-out and one bulk-in. A CCID that reports ICC insertion or removal

events must also support an interrupt endpoint.

Table 5.2-1 Configuration of endpoints for a CCID

Endpoint Direction Option Definition

Bulk OUT OUT Mandatory CCID Command pipe

Bulk IN IN Mandatory CCID Response pipe

Interrupt IN Optional CCID Event Notification pipe

If the CCID does not support queuing, it reports bMaxCCIDBusySlots equal to 01h;

which means that the CCID will treat all commands synchronously.

Page 20 of 123 CCID Rev 1.1

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