49 lines
1.4 KiB
XML
49 lines
1.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<refentry id="scasn1puttag">
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<refentryinfo><title>OpenSC API Reference</title></refentryinfo>
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<refmeta>
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<refentrytitle>sc_asn1_put_tag</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_asn1_put_tag</refname>
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<refpurpose>Construct an ASN.1 entry in a buffer</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_asn1_put_tag(int tag, const unsigned char *data, int datalen,
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unsigned char *out, int outlen, unsigned char **nextbuf);
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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 constructs a single entry in an ASN.1 stream, at the buffer pointed to by
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<emphasis>out</emphasis> (which is <emphasis>outlen</emphasis> bytes long). The tag to be used
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is in <emphasis>tag</emphasis>, and the entry payload is pointed to by <emphasis>data</emphasis>,
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which is <emphasis>datalen</emphasis> bytes long.
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</para>
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<para>
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If <emphasis>nextbuf</emphasis> is not NULL, it will be filled in with a pointer to the buffer
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address immediately following the newly copied entry.
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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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