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<div class="section" id="krb5-mk-req-extended-create-a-krb-ap-req-message-using-supplied-credentials">
<h1>krb5_mk_req_extended - Create a KRB_AP_REQ message using supplied credentials.<a class="headerlink" href="#krb5-mk-req-extended-create-a-krb-ap-req-message-using-supplied-credentials" title="Permalink to this headline">¶</a></h1>
<dl class="function">
<dt id="c.krb5_mk_req_extended">
<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_mk_req_extended</tt><big>(</big><a class="reference internal" href="../types/krb5_context.html#c.krb5_context" title="krb5_context">krb5_context</a><em> context</em>, <a class="reference internal" href="../types/krb5_auth_context.html#c.krb5_auth_context" title="krb5_auth_context">krb5_auth_context</a> *<em> auth_context</em>, <a class="reference internal" href="../types/krb5_flags.html#c.krb5_flags" title="krb5_flags">krb5_flags</a><em> ap_req_options</em>, <a class="reference internal" href="../types/krb5_data.html#c.krb5_data" title="krb5_data">krb5_data</a> *<em> in_data</em>, <a class="reference internal" href="../types/krb5_creds.html#c.krb5_creds" title="krb5_creds">krb5_creds</a> *<em> in_creds</em>, <a class="reference internal" href="../types/krb5_data.html#c.krb5_data" title="krb5_data">krb5_data</a> *<em> outbuf</em><big>)</big><a class="headerlink" href="#c.krb5_mk_req_extended" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
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<col class="field-name" />
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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>[inout]</strong> <strong>auth_context</strong> - Pre-existing or newly created auth context</p>
<p><strong>[in]</strong> <strong>ap_req_options</strong> - <tt class="xref py py-data docutils literal"><span class="pre">AP_OPTS</span></tt> options</p>
<p><strong>[in]</strong> <strong>in_data</strong> - Application data to be checksummed in the authenticator, or NULL</p>
<p><strong>[in]</strong> <strong>in_creds</strong> - Credentials for the service with valid ticket and key</p>
<p class="last"><strong>[out]</strong> <strong>outbuf</strong> - <strong>AP-REQ</strong> message</p>
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<tr class="field-odd field"><th class="field-name">retval:</th><td class="field-body"><ul class="first last simple">
<li>0 Success; otherwise - Kerberos error codes</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>Valid <em>ap_req_options</em> are:</p>
<blockquote>
<div><blockquote>
<div><ul class="simple">
<li><a class="reference internal" href="../macros/AP_OPTS_USE_SESSION_KEY.html#AP_OPTS_USE_SESSION_KEY" title="AP_OPTS_USE_SESSION_KEY"><tt class="xref py py-data docutils literal"><span class="pre">AP_OPTS_USE_SESSION_KEY</span></tt></a> - Use the session key when creating the request used for user to user authentication.</li>
<li><a class="reference internal" href="../macros/AP_OPTS_MUTUAL_REQUIRED.html#AP_OPTS_MUTUAL_REQUIRED" title="AP_OPTS_MUTUAL_REQUIRED"><tt class="xref py py-data docutils literal"><span class="pre">AP_OPTS_MUTUAL_REQUIRED</span></tt></a> - Request a mutual authentication packet from the reciever.</li>
<li><a class="reference internal" href="../macros/AP_OPTS_USE_SUBKEY.html#AP_OPTS_USE_SUBKEY" title="AP_OPTS_USE_SUBKEY"><tt class="xref py py-data docutils literal"><span class="pre">AP_OPTS_USE_SUBKEY</span></tt></a> - Generate a subsession key from the current session key obtained from the credentials.</li>
</ul>
</div></blockquote>
<p>This function creates a KRB_AP_REQ message using supplied credentials <em>in_creds</em> . <em>auth_context</em> may point to an existing auth context or to NULL, in which case a new one will be created. If <em>in_data</em> is non-null, a checksum of it will be included in the authenticator contained in the KRB_AP_REQ message. Use <a class="reference internal" href="krb5_free_data_contents.html#c.krb5_free_data_contents" title="krb5_free_data_contents"><tt class="xref c c-func docutils literal"><span class="pre">krb5_free_data_contents()</span></tt></a> to free <em>outbuf</em> when it is no longer needed.</p>
</div></blockquote>
<p>On successful return, the authenticator is stored in <em>auth_context</em> with the <em>client</em> and <em>checksum</em> fields nulled out. (This is to prevent pointer-sharing problems; the caller should not need these fields anyway, since the caller supplied them.)</p>
<div class="admonition seealso">
<p class="first admonition-title">See also</p>
<p class="last"><a class="reference internal" href="krb5_mk_req.html#c.krb5_mk_req" title="krb5_mk_req"><tt class="xref c c-func docutils literal"><span class="pre">krb5_mk_req()</span></tt></a></p>
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