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<h1>krb5_c_prfplus - Generate pseudo-random bytes using RFC 6113 PRF+.<a class="headerlink" href="#krb5-c-prfplus-generate-pseudo-random-bytes-using-rfc-6113-prf" title="Permalink to this headline">¶</a></h1>
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<dt id="c.krb5_c_prfplus">
<a class="reference internal" href="../types/krb5_error_code.html#c.krb5_error_code" title="krb5_error_code">krb5_error_code</a> <tt class="descname">krb5_c_prfplus</tt><big>(</big><a class="reference internal" href="../types/krb5_context.html#c.krb5_context" title="krb5_context">krb5_context</a><em> context</em>, const <a class="reference internal" href="../types/krb5_keyblock.html#c.krb5_keyblock" title="krb5_keyblock">krb5_keyblock</a> *<em> k</em>, const <a class="reference internal" href="../types/krb5_data.html#c.krb5_data" title="krb5_data">krb5_data</a> *<em> input</em>, <a class="reference internal" href="../types/krb5_data.html#c.krb5_data" title="krb5_data">krb5_data</a> *<em> output</em><big>)</big><a class="headerlink" href="#c.krb5_c_prfplus" title="Permalink to this definition">¶</a></dt>
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<tr class="field-odd field"><th class="field-name">param:</th><td class="field-body"><p class="first"><strong>[in]</strong> <strong>context</strong> - Library context</p>
<p><strong>[in]</strong> <strong>k</strong> - KDC contribution key</p>
<p><strong>[in]</strong> <strong>input</strong> - Input data</p>
<p class="last"><strong>[out]</strong> <strong>output</strong> - Pseudo-random output buffer</p>
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<tr class="field-odd field"><th class="field-name">return:</th><td class="field-body"><ul class="first last simple">
<li>0 on success, E2BIG if output->length is too large for PRF+ to generate, ENOMEM on allocation failure, or an error code from krb5_c_prf()</li>
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<p>This function fills <em>output</em> with PRF+(k, input) as defined in RFC 6113 section 5.1. The caller must preinitialize <em>output</em> and allocate the desired amount of space. The length of the pseudo-random output will match the length of <em>output</em> .</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">RFC 4402 defines a different PRF+ operation. This function does not implement that operation.</p>
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