Technical Overview of Java Card

Technical Overview of Java for Smartcards Anshuman Sinha

Presentation ,[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Why Java for Smartcards? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Java Platforms Anshuman Sinha <anshuman.sinha2@gmail.com> Java Platform Size Machine Size

Java Card Tool Chain Anshuman Sinha <anshuman.sinha2@gmail.com> .Java Files .class Files .jca Files .exp Files Converter Java Smartcard Loader ,[object Object],[object Object],[object Object],Compiler . exp Files .cap Files

Java Card Block Diagram Anshuman Sinha <anshuman.sinha2@gmail.com> Card Operating System Java Card VM Java Card Runtime Environment (JCRE) Java Card API APDU Response Card Manager Smartcard Controller + Cryptography Co-processor Applet 3 Applet 2 Applet 1 Currently Selected Applet Vertical API(s)

Hardware Anshuman Sinha <anshuman.sinha2@gmail.com> R / F Interface Memory Chip Controller Antenna Coil Clk I/O Reset Vcc GND Clk I/O Reset Vcc GND Clk Mod Demod EEPROM Security & Address Logic EEPROM ROM CPU NPU Smartcard Contacts ROM RAM

Java Card Operating System Anshuman Sinha <anshuman.sinha2@gmail.com> Process Loop Terminal Command ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],EEPROM/Flash Memory Write Log ,[object Object],[object Object],ISO Commands ISO File System Anti-Tearing Tear Begin Transaction EF 1 EF 2 DF1 DF2 MF

Java Card Runtime Environment Anshuman Sinha <anshuman.sinha2@gmail.com> ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Applet Data and Code Applet Firewall Java Bytecode Storage Java Object Store Applet 3 Applet 2 Applet 1 Currently Selected Applet

Applet Firewalling ,[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Smartcard Protocols Anshuman Sinha <anshuman.sinha2@gmail.com> 7816 – 4 Inter-Industry commands for interchanges 7816 - 1 Physical Characteristics 7816 - 2 Dimension and locations of the contacts 14443 - 1 Physical Characteristics 7816 - 3 Electronic Signals and Transmission Protocol 14443 - 2 RF power and Signal I/F 14443 - 3 Initialization and anticollision 14443 - 4 Transmission protocol 7816 - 3 T=1/T=0 Transmission protocol Contact stack Contactless stack

Java Card 2.2.2 API ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com> Core Packages

Java Subsetting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Fully Supported Features ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Partially supported features ,[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Token-based Linking ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Java Execution Engine Anshuman Sinha <anshuman.sinha2@gmail.com> Runtime Applet Context Applet (package) JCRE Context Operands Frame 16 bit Word 1. 2. Bytecode Handlers Native Table Function Locals Execute 3. Increment Fetch Update Java Heap

Security Exception ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com> ,[object Object],[object Object]

Exceptions ,[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Exceptions ,[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Global Platform ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Card Manager Life Cycle Anshuman Sinha <anshuman.sinha2@gmail.com> OP_Ready Initialised Secured CM_Locked Terminated Card manager acts as default selected application Initialisation key controls access At least one key set loaded Post-issuance mode (at least MACing required) All applications locked Only Card Manager is available End of card life cycle (card is mute) APDU Set Status API lockCardManager API terminateCardManager

Applet Life Cycle Anshuman Sinha <anshuman.sinha2@gmail.com> Installed Selectable Personalized Blocked Locked Application is installed (instantiated) but not available yet Application is available (activated) Application has been personalized Application is blocked, but behaviour is application-dependent Application is locked (not available) Only Card Manager can unlock APDU Set Status API setCardContentState Deleted APDU Install APDU Delete

Applet Loading Anshuman Sinha <anshuman.sinha2@gmail.com> Security Domain B Card Manager Security Domain A Applet Applet Application Provider B Card Issuer OPEN NETWORK Application Provider A HOST CARD Application Provider A Application Provider B Java Card Applet Applet chunks Secure Channel

Java Card Applets [1/2] ,[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com> Called by JCRE before selection of another applet . Called by JCRE on behalf of client applet to get all methods which are shared … Called by JCRE on behalf of client applet to get all methods which are shared …

Java Card Applets [2/2] ,[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com> Called by JCRE to process application specific commands Called by JCRE to process application specific commands Called by JCRE when this applet is selected Called by JCRE to return any data back to terminal while the applet is being selected

Client Software ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

PCSC/JPCSC Design Anshuman Sinha <anshuman.sinha2@gmail.com> ICC Aware Application Service Providers ICC Resource Manager IFD IFD IFD RS232 PS/2 IFD Handler ICC ICC ICC IFD Handler IFD Handler

References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Anshuman Sinha <anshuman.sinha2@gmail.com>

Technical Overview of Java Card

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