49 lines
1.2 KiB
XML
49 lines
1.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<refentry id="scgetdata">
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<refentryinfo><title>OpenSC API Reference</title></refentryinfo>
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<refmeta>
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<refentrytitle>sc_get_data</refentrytitle>
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<manvolnum>3</manvolnum>
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<refmiscinfo>opensc</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>sc_get_data</refname>
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<refpurpose>Get a primitive data object from a card</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Synopsis</title>
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<para>
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<programlisting>
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#include <opensc.h>
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int sc_get_data(sc_card_t *card, unsigned int tag,
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unsigned char *buf, size_t buflen);
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</programlisting>
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</para>
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</refsect1>
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<refsect1>
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<title>Description</title>
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<para>
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This function is used to retrieve a primitive data object from
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<emphasis>card</emphasis>. It corresponds to the GET DATA command in the
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ISO 7816 standard. The data is stored in
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<emphasis>buf</emphasis>, which is <emphasis>buflen</emphasis> bytes long.
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</para>
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<para>
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The <emphasis>tag</emphasis> parameter specifies the object to be retrieved.
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Refer to the standard for the correct values to use.
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</para>
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</refsect1>
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<refsect1>
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<title>Return value</title>
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<para>
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Returns 0 if successful, or a negative value in case of error.
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</para>
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</refsect1>
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</refentry>
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