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<h1>krb5_verify_init_creds - Verify initial credentials against a keytab.<a class="headerlink" href="#krb5-verify-init-creds-verify-initial-credentials-against-a-keytab" title="Permalink to this headline">¶</a></h1>
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<dt id="c.krb5_verify_init_creds">
<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_verify_init_creds</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_creds.html#c.krb5_creds" title="krb5_creds">krb5_creds</a> *<em> creds</em>, <a class="reference internal" href="../types/krb5_principal.html#c.krb5_principal" title="krb5_principal">krb5_principal</a><em> server</em>, <a class="reference internal" href="../types/krb5_keytab.html#c.krb5_keytab" title="krb5_keytab">krb5_keytab</a><em> keytab</em>, <a class="reference internal" href="../types/krb5_ccache.html#c.krb5_ccache" title="krb5_ccache">krb5_ccache</a> *<em> ccache</em>, <a class="reference internal" href="../types/krb5_verify_init_creds_opt.html#c.krb5_verify_init_creds_opt" title="krb5_verify_init_creds_opt">krb5_verify_init_creds_opt</a> *<em> options</em><big>)</big><a class="headerlink" href="#c.krb5_verify_init_creds" 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>creds</strong> - Initial credentials to be verified</p>
<p><strong>[in]</strong> <strong>server</strong> - Server principal (or NULL)</p>
<p><strong>[in]</strong> <strong>keytab</strong> - Key table (NULL to use default keytab)</p>
<p><strong>[in]</strong> <strong>ccache</strong> - Credential cache for fetched creds (or NULL)</p>
<p class="last"><strong>[in]</strong> <strong>options</strong> - Verification options (NULL for default options)</p>
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<li>0 Success; otherwise - Kerberos error codes</li>
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<p>This function attempts to verify that <em>creds</em> were obtained from a KDC with knowledge of a key in <em>keytab</em> , or the default keytab if <em>keytab</em> is NULL. If <em>server</em> is provided, the highest-kvno key entry for that principal name is used to verify the credentials; otherwise, all unique”host”service principals in the keytab are tried.</p>
<p>If the specified keytab does not exist, or is empty, or cannot be read, or does not contain an entry for <em>server</em> , then credential verification may be skipped unless configuration demands that it succeed. The caller can control this behavior by providing a verification options structure; see <a class="reference internal" href="krb5_verify_init_creds_opt_init.html#c.krb5_verify_init_creds_opt_init" title="krb5_verify_init_creds_opt_init"><tt class="xref c c-func docutils literal"><span class="pre">krb5_verify_init_creds_opt_init()</span></tt></a> and <a class="reference internal" href="krb5_verify_init_creds_opt_set_ap_req_nofail.html#c.krb5_verify_init_creds_opt_set_ap_req_nofail" title="krb5_verify_init_creds_opt_set_ap_req_nofail"><tt class="xref c c-func docutils literal"><span class="pre">krb5_verify_init_creds_opt_set_ap_req_nofail()</span></tt></a> .</p>
<p>If <em>ccache</em> is NULL, any additional credentials fetched during the verification process will be destroyed. If <em>ccache</em> points to NULL, a memory ccache will be created for the additional credentials and returned in <em>ccache</em> . If <em>ccache</em> points to a valid credential cache handle, the additional credentials will be stored in that cache.</p>
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