ccid 提供了普通 USB CCID (Chip/Smart Card Interface Devices) 驱动和 ICCD (Integrated Circuit(s) Card Devices) 的驱动程序源码。

特点：

• Exchange levels
  • short APDU
  • extended APDU (with some limitations and lack of support from PC/SC)
  • TPDU
  • character
• multi-slot readers
• composite CCID device
• PC/SC v2 part 10 features:
  • GET_FEATURE_REQUEST
  • secure PIN verify (FEATURE_VERIFY_PIN_DIRECT)
  • modify PIN entry (FEATURE_MODIFY_PIN_DIRECT)
  • reader PIN properties (FEATURE_IFD_PIN_PROPERTIES)
  • Multifunctional Card Terminal reader direct (FEATURE_MCT_READER_DIRECT)
  • retrieve reader properties in TLV form (FEATURE_GET_TLV_PROPERTIES)
    • bMinPINSize and bMaxPINSize: How to know the PIN sizes supported by a pinpad reader?
    • bEntryValidationCondition
• Data rates list
• Localize LCD display messages (Gemalto GemPC PIN PAD, Covadis V茅ga-Alpha)
• Extended APDU (for T=1 cards only and if your reader is in TPDU mode or extended APDU mode)
• SCardGetAttrib() attributes
• ICCD versions A and B
• USB selective suspend

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