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<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="c function">
<dt class="sig sig-object c" id="c.krb5_mk_req_extended">
<a class="reference internal" href="../types/krb5_error_code.html#c.krb5_error_code" title="krb5_error_code"><span class="n"><span class="pre">krb5_error_code</span></span></a><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">krb5_mk_req_extended</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="../types/krb5_context.html#c.krb5_context" title="krb5_context"><span class="n"><span class="pre">krb5_context</span></span></a><span class="w"> </span><span class="n"><span class="pre">context</span></span>, <a class="reference internal" href="../types/krb5_auth_context.html#c.krb5_auth_context" title="krb5_auth_context"><span class="n"><span class="pre">krb5_auth_context</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">auth_context</span></span>, <a class="reference internal" href="../types/krb5_flags.html#c.krb5_flags" title="krb5_flags"><span class="n"><span class="pre">krb5_flags</span></span></a><span class="w"> </span><span class="n"><span class="pre">ap_req_options</span></span>, <a class="reference internal" href="../types/krb5_data.html#c.krb5_data" title="krb5_data"><span class="n"><span class="pre">krb5_data</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">in_data</span></span>, <a class="reference internal" href="../types/krb5_creds.html#c.krb5_creds" title="krb5_creds"><span class="n"><span class="pre">krb5_creds</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">in_creds</span></span>, <a class="reference internal" href="../types/krb5_data.html#c.krb5_data" title="krb5_data"><span class="n"><span class="pre">krb5_data</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">outbuf</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.krb5_mk_req_extended" title="Permalink to this definition">¶</a><br /></dt>
<dd></dd></dl>
<dl class="field-list">
<dt class="field-odd">param</dt>
<dd class="field-odd"><p><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> - Options (see AP_OPTS macros)</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><strong>[out]</strong> <strong>outbuf</strong> - <strong>AP-REQ</strong> message</p>
</dd>
</dl>
<dl class="field-list simple">
<dt class="field-odd">retval</dt>
<dd class="field-odd"><ul class="simple">
<li><p>0 Success; otherwise - Kerberos error codes</p></li>
</ul>
</dd>
</dl>
<p>Valid <em>ap_req_options</em> are:</p>
<blockquote>
<div><blockquote>
<div><ul class="simple">
<li><p>#AP_OPTS_USE_SESSION_KEY - Use the session key when creating the request used for user to user authentication.</p></li>
<li><p>#AP_OPTS_MUTUAL_REQUIRED - Request a mutual authentication packet from the receiver.</p></li>
<li><p>#AP_OPTS_USE_SUBKEY - Generate a subsession key from the current session key obtained from the credentials.</p></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 krb5_free_data_contents() 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="admonition-title">See also</p>
<p>krb5_mk_req()</p>
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