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<section id="krb5-auth-con-init-create-and-initialize-an-authentication-context">
<h1>krb5_auth_con_init - Create and initialize an authentication context.<a class="headerlink" href="#krb5-auth-con-init-create-and-initialize-an-authentication-context" title="Link to this heading">¶</a></h1>
<dl class="c function">
<dt class="sig sig-object c" id="c.krb5_auth_con_init">
<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_auth_con_init</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><span class="sig-paren">)</span><a class="headerlink" href="#c.krb5_auth_con_init" title="Link to this definition">¶</a><br /></dt>
<dd></dd></dl>
<dl class="field-list">
<dt class="field-odd">param<span class="colon">:</span></dt>
<dd class="field-odd"><p><strong>[in]</strong> <strong>context</strong> - Library context</p>
<p><strong>[out]</strong> <strong>auth_context</strong> - Authentication context</p>
</dd>
</dl>
<dl class="field-list simple">
<dt class="field-odd">retval<span class="colon">:</span></dt>
<dd class="field-odd"><ul class="simple">
<li><p>0 Success; otherwise - Kerberos error codes</p></li>
</ul>
</dd>
</dl>
<p>This function creates an authentication context to hold configuration and state relevant to krb5 functions for authenticating principals and protecting messages once authentication has occurred.</p>
<p>By default, flags for the context are set to enable the use of the replay cache (KRB5_AUTH_CONTEXT_DO_TIME), but not sequence numbers. Use krb5_auth_con_setflags() to change the flags.</p>
<p>The allocated <em>auth_context</em> must be freed with krb5_auth_con_free() when it is no longer needed.</p>
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