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  <div class="section" id="krb5-c-encrypt-encrypt-data-using-a-key-operates-on-keyblock">
<h1>krb5_c_encrypt -  Encrypt data using a key (operates on keyblock).<a class="headerlink" href="#krb5-c-encrypt-encrypt-data-using-a-key-operates-on-keyblock" title="Permalink to this headline"></a></h1>
<dl class="function">
<dt id="c.krb5_c_encrypt">
<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_c_encrypt</tt><big>(</big><a class="reference internal" href="../types/krb5_context.html#c.krb5_context" title="krb5_context">krb5_context</a><em>&nbsp;context</em>, const <a class="reference internal" href="../types/krb5_keyblock.html#c.krb5_keyblock" title="krb5_keyblock">krb5_keyblock</a> *<em>&nbsp;key</em>, <a class="reference internal" href="../types/krb5_keyusage.html#c.krb5_keyusage" title="krb5_keyusage">krb5_keyusage</a><em>&nbsp;usage</em>, const <a class="reference internal" href="../types/krb5_data.html#c.krb5_data" title="krb5_data">krb5_data</a> *<em>&nbsp;cipher_state</em>, const <a class="reference internal" href="../types/krb5_data.html#c.krb5_data" title="krb5_data">krb5_data</a> *<em>&nbsp;input</em>, <a class="reference internal" href="../types/krb5_enc_data.html#c.krb5_enc_data" title="krb5_enc_data">krb5_enc_data</a> *<em>&nbsp;output</em><big>)</big><a class="headerlink" href="#c.krb5_c_encrypt" 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>key</strong> - Encryption key</p>
<p><strong>[in]</strong> <strong>usage</strong> - Key usage (see <tt class="xref py py-data docutils literal"><span class="pre">KRB5_KEYUSAGE</span></tt> types)</p>
<p><strong>[inout]</strong> <strong>cipher_state</strong> - Cipher state; specify NULL if not needed</p>
<p><strong>[in]</strong> <strong>input</strong> - Data to be encrypted</p>
<p class="last"><strong>[out]</strong> <strong>output</strong> - Encrypted data</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>
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<p>This function encrypts the data block <em>input</em> and stores the output into <em>output</em> . The actual encryption key will be derived from <em>key</em> and <em>usage</em> if key derivation is specified for the encryption type. If non-null, <em>cipher_state</em> specifies the beginning state for the encryption operation, and is updated with the state to be passed as input to the next operation.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The caller must initialize <em>output</em> and allocate at least enough space for the result (using <a class="reference internal" href="krb5_c_encrypt_length.html#c.krb5_c_encrypt_length" title="krb5_c_encrypt_length"><tt class="xref c c-func docutils literal"><span class="pre">krb5_c_encrypt_length()</span></tt></a> to determine the amount of space needed). <em>output-&gt;length</em> will be set to the actual length of the ciphertext.</p>
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