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<title>krb5_c_crypto_length_iov - Fill in lengths for header, trailer and padding in a IOV array. — MIT Kerberos Documentation</title>
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<section id="krb5-c-crypto-length-iov-fill-in-lengths-for-header-trailer-and-padding-in-a-iov-array">
<h1>krb5_c_crypto_length_iov - Fill in lengths for header, trailer and padding in a IOV array.<a class="headerlink" href="#krb5-c-crypto-length-iov-fill-in-lengths-for-header-trailer-and-padding-in-a-iov-array" title="Link to this heading">¶</a></h1>
<dl class="c function">
<dt class="sig sig-object c" id="c.krb5_c_crypto_length_iov">
<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_c_crypto_length_iov</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_enctype.html#c.krb5_enctype" title="krb5_enctype"><span class="n"><span class="pre">krb5_enctype</span></span></a><span class="w"> </span><span class="n"><span class="pre">enctype</span></span>, <a class="reference internal" href="../types/krb5_crypto_iov.html#c.krb5_crypto_iov" title="krb5_crypto_iov"><span class="n"><span class="pre">krb5_crypto_iov</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">data</span></span>, <span class="n"><span class="pre">size_t</span></span><span class="w"> </span><span class="n"><span class="pre">num_data</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.krb5_c_crypto_length_iov" 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>[in]</strong> <strong>enctype</strong> - Encryption type</p>
<p><strong>[inout]</strong> <strong>data</strong> - IOV array</p>
<p><strong>[in]</strong> <strong>num_data</strong> - Size of <em>data</em></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>Padding is set to the actual padding required based on the provided <em>data</em> buffers. Typically this API is used after setting up the data buffers and KRB5_CRYPTO_TYPE_SIGN_ONLY buffers, but before actually allocating header, trailer and padding.</p>
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