ISO 7816-4 PDF

The bits 4 and 8 are used for Vpp control which will not be discussed further here. The node address byte allows the use of multiple logical channels where required otherwise both addresses should be set to zero. The receive - ready block is used as an acknowledgment when the protocol is sending data as a sequence of chained blocks. The supervising block is used to establish control parameters and to effect a resynchronisation or abort status as the result of some error condition.

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The smart card is carried by an individual and is periodically utilized in various equipment configurations to achieve the results or obtain the services provided by those configurations. In other cases, besides authenticating identity, the smart card may carry additional information needed by the application.

For example, in financial debit and credit applications, the smart card may carry an account number or numbers , which are to be accessed in backend servers involved in the application.

This translates into a situation of two application-level programs running on peer-level computers needing to communicate with each other. Figure 4. Essentially, all of the layers described in the ISO Reference Model are found in the communication channel between an off-card application and the corresponding application on the smart card.

The smart card protocols do present some rather eccentric characteristics relative to a true peer-to-peer communication protocol.

Most noteworthy, perhaps, is the fact that the host and the smart card actually operate in a master-slave mode. The host requests an operation of the card and the card performs the operation and tells the host the results. General Architecture of Applications The earliest smart cards were designed from scratch with the larger application in mind and the function of the smart card well established from the beginning.

A command set was implemented on the card to provide the necessary functionality for the application. This approach, of course, tended to argue against having multiple smart card and other equipment vendors provide components for the application.

It is further assumed that the smart card provides a relatively secure platform on which to store information. Consequently, a general protocol for authenticating identities and then authorizing operations based on those identities was defined. Finally, because true general transaction operations were extremely difficult to provide, a reduced form of transaction operation was defined that would allow simple operations to be performed on smart card files in a highly secure and reliable fashion.

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ISO/IEC 7816-4:2005

The smart card is carried by an individual and is periodically utilized in various equipment configurations to achieve the results or obtain the services provided by those configurations. In other cases, besides authenticating identity, the smart card may carry additional information needed by the application. For example, in financial debit and credit applications, the smart card may carry an account number or numbers , which are to be accessed in backend servers involved in the application. This translates into a situation of two application-level programs running on peer-level computers needing to communicate with each other. Figure 4. Essentially, all of the layers described in the ISO Reference Model are found in the communication channel between an off-card application and the corresponding application on the smart card.

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It does not describe these algorithms. It does not cover the internal implementation within the card or the outside world. It gives the identifier, name, description, format, coding and layout of each DE and defines the means of retrieval of DEs from the card. Annexes are provided that give examples of operations related to digital signatures, certificates and the import and export of asymmetric keys. The choice and conditions of use of cryptographic mechanisms may affect card exportability. These commands cover the entire life cycle of the card and therefore some commands may be used before the card has been issued to the cardholder or after the card has expired. An annex is provided that shows how to control the loading of data secure download into the card, by means of verifying the access rights of the loading entity and protection of the transmitted data with secure messaging.

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iso iec 7816 4

What benefit has a uniform library, if one has no certainty, that the resulting APDU will work? Therefore most solutions employ a middleware, which uses description files showing the supported features, sometimes combined with some active code to reformat the commands or compose a wanted functionality by a sequence of APDUs. Due to the big efforts for such a solution, most of them are strictly purpose-oriented, like PKCS So either your solution addresses a small sector, for which such a framework exists, or you will have to combine these bytes yourself.

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ISO/IEC 7816 Part 4: Interindustry command for interchange

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