Wolfgang Hommel > pcsc-perl > Chipcard::PCSC

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NAME ^

Chipcard::PCSC - Smart card reader interface library

SYNOPSIS ^

 my $hContext = new Chipcard::PCSC();

 @ReadersList = $hContext->ListReaders ();

 $hContext->GetStatusChange(\@readers_states, $timeout);

 $apdu = Chipcard::PCSC::array_to_ascii(@apdu);

 @apdu = Chipcard::PCSC::ascii_to_array($apdu);

 $hContext = undef;

DESCRIPTION ^

The PCSC module implements the Chipcard::PCSC class. Objects of this class are used to communicate with the PCSC-lite daemon (see pcscd(1) for more information).

PC/SC represents an abstraction layer to smart card readers. It provides a communication layer with a wide variety of smart card readers through a standardized API.

A PCSC object can be used to communicate with more than one reader through Chipcard::PCSC::Card objects. Please read Chipcard::PCSC::Card for extended information on how to talk to a smart card reader.

A PCSC object uses the following property: $pcsc_object->{hContext} the context returned by the pcsc library

CONSTRUCTORS ^

The following methods can be used to construct a PCSC object:

CONSTRUCTION FAILURE ^

Chipcard::PCSC constructors return an undef value when the object can not be created. $Chipcard::PCSC::errno can be used to get more information about the error. (See section "ERROR HANDLING" below for more information)

Chipcard::PCSC METHODS ^

Here is a list of all the methods that can be used with a PCSC object.

ERROR HANDLING ^

All functions from PCSC objects save the return value in a global variable called $Chipcard::PCSC::errno. This variable therefore holds the latest status of PCSC.

It is a double-typed magical variable that behaves just like $!. This means that it both holds a numerical value describing the error and the corresponding string. The numerical value may change from a system to another as it depends on the PCSC library...

Here is a small example of how to use it:

 $hContext = new Chipcard::PCSC();
 die ("Can't create the PCSC object: $Chipcard::PCSC::errno\n")
     unless (defined $hContext);

In case the last call was successful, $Chipcard::PCSC::errno contains the SCARD_S_SUCCESS status. Here is a list of all possible error codes. They are defined as read-only variables with in the PCSC module:

 $Chipcard::PCSC::SCARD_S_SUCCESS
 $Chipcard::PCSC::SCARD_E_CANCELLED
 $Chipcard::PCSC::SCARD_E_CANT_DISPOSE
 $Chipcard::PCSC::SCARD_E_CARD_UNSUPPORTED
 $Chipcard::PCSC::SCARD_E_DUPLICATE_READER
 $Chipcard::PCSC::SCARD_E_INSUFFICIENT_BUFFER
 $Chipcard::PCSC::SCARD_E_INVALID_ATR
 $Chipcard::PCSC::SCARD_E_INVALID_HANDLE
 $Chipcard::PCSC::SCARD_E_INVALID_PARAMETER
 $Chipcard::PCSC::SCARD_E_INVALID_TARGET
 $Chipcard::PCSC::SCARD_E_INVALID_VALUE
 $Chipcard::PCSC::SCARD_E_NO_MEMORY
 $Chipcard::PCSC::SCARD_E_NO_SERVICE
 $Chipcard::PCSC::SCARD_E_NO_SMARTCARD
 $Chipcard::PCSC::SCARD_E_NOT_READY
 $Chipcard::PCSC::SCARD_E_NOT_TRANSACTED
 $Chipcard::PCSC::SCARD_E_PCI_TOO_SMALL
 $Chipcard::PCSC::SCARD_E_PROTO_MISMATCH
 $Chipcard::PCSC::SCARD_E_READER_UNAVAILABLE
 $Chipcard::PCSC::SCARD_E_READER_UNSUPPORTED
 $Chipcard::PCSC::SCARD_E_SERVICE_STOPPED
 $Chipcard::PCSC::SCARD_E_SHARING_VIOLATION
 $Chipcard::PCSC::SCARD_E_SYSTEM_CANCELLED
 $Chipcard::PCSC::SCARD_E_TIMEOUT
 $Chipcard::PCSC::SCARD_E_UNKNOWN_CARD
 $Chipcard::PCSC::SCARD_E_UNKNOWN_READER
 $Chipcard::PCSC::SCARD_E_UNSUPPORTED_FEATURE

 $Chipcard::PCSC::SCARD_W_REMOVED_CARD
 $Chipcard::PCSC::SCARD_W_RESET_CARD
 $Chipcard::PCSC::SCARD_W_UNPOWERED_CARD
 $Chipcard::PCSC::SCARD_W_UNRESPONSIVE_CARD
 $Chipcard::PCSC::SCARD_W_UNSUPPORTED_CARD

PCSClite users will also be able to use the following (PCSClite specific) codes:

 $Chipcard::PCSC::SCARD_INSERTED
 $Chipcard::PCSC::SCARD_REMOVED
 $Chipcard::PCSC::SCARD_RESET
 $Chipcard::PCSC::SCARD_SCOPE_GLOBAL

In addition, the wrapper defines:

 $Chipcard::PCSC::SCARD_P_ALREADY_CONNECTED
 $Chipcard::PCSC::SCARD_P_NOT_CONNECTED

SEE ALSO ^

pcscd(1) manpage has useful information about PC/SC lite. Chipcard::PCSC::Card manpage gives information about how to communicate with a reader and the smart card inside it.

COPYRIGHT ^

(C) Lionel VICTOR & Ludovic ROUSSEAU, 2001-2004, GNU GPL (C) Ludovic ROUSSEAU, 2005-2008, GNU GPL

AUTHORS / ACKNOWLEDGEMENT ^

 Lionel VICTOR <lionel.victor@unforgettable.com>
               <lionel.victor@free.fr>

 Ludovic ROUSSEAU <ludovic.rousseau@free.fr>
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