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  138. <h1>Object Instance <code>nixio.CryptoHash</code></h1>
  139. <p>
  140. Cryptographical Hash and HMAC object.</p>
  141. <h2>Functions</h2>
  142. <table class="function_list">
  143. <tr>
  144. <td class="name" nowrap><a href="#CryptoHash.final">CryptoHash:final</a>&nbsp;()</td>
  145. <td class="summary">
  146. Finalize the hash and return the digest.</td>
  147. </tr>
  148. <tr>
  149. <td class="name" nowrap><a href="#CryptoHash.update">CryptoHash:update</a>&nbsp;(chunk)</td>
  150. <td class="summary">
  151. Add another chunk of data to be hashed.</td>
  152. </tr>
  153. </table>
  154. <br/>
  155. <br/>
  156. <h2><a name="functions"></a>Functions</h2>
  157. <dl class="function">
  158. <dt><a name="CryptoHash.final"></a><strong>CryptoHash:final</strong>&nbsp;()</dt>
  159. <dd>
  160. Finalize the hash and return the digest.
  161. <h3>Usage:</h3>
  162. You cannot call update on a hash object that was already finalized
  163. you can however call final multiple times to get the digest.
  164. <h3>Return values:</h3>
  165. <ol>
  166. <li>hexdigest
  167. <li>buffer containing binary digest
  168. </ol>
  169. </dd>
  170. <dt><a name="CryptoHash.update"></a><strong>CryptoHash:update</strong>&nbsp;(chunk)</dt>
  171. <dd>
  172. Add another chunk of data to be hashed.
  173. <h3>Parameters</h3>
  174. <ul>
  175. <li>
  176. chunk: Chunk of data
  177. </li>
  178. </ul>
  179. <h3>Return value:</h3>
  180. CryptoHash object (self)
  181. </dd>
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