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7<title>CalculateHmacSha1</title>
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10<h1><CODE><a href="../../nn/Overview.html">nn</a>::<a href="../../nn/crypto/Overview.html">crypto</a>::CalculateHmacSha1</CODE> Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">
14void CalculateHmacSha1(
15     void * pOut,
16     const void * pData,
17     size_t size,
18     const void * pKeyData,
19     size_t keySize
20);
21</pre>
22    </div>
23<h2>Parameters</h2>
24    <div class="section">
25      <table class="arguments">
26        <thead>
27          <tr>
28            <td width="15" />
29<th>Name</th>
30<td>Description</td>
31          </tr>
32        </thead>
33        <tr>
34<td>out</td>
35<th>pOut</th>
36<td>Pointer to the location in which to store the <CODE>HMAC</CODE> value (4-byte alignment)</td>
37        </tr>
38        <tr>
39<td>in</td>
40<th>pData</th>
41<td>Pointer to the input data.</td>
42        </tr>
43        <tr>
44<td>in</td>
45<th>size</th>
46<td>Length of the input data.</td>
47        </tr>
48        <tr>
49<td>in</td>
50<th>pKeyData</th>
51<td>Pointer to the key data.</td>
52        </tr>
53        <tr>
54<td>in</td>
55<th>keySize</th>
56<td>Length of the key data.</td>
57        </tr> </table>
58    </div>
59<h2>Return Values</h2>
60    <div class="section">
61None.
62               </div>
63<h2>Description</h2>
64    <div class="section">
65<p>Performs HMAC-SHA1 calculation.</p><p><span class="argument">pOut</span> is a 4-byte aligned pointer. It requires <CODE>Sha1Context::HASH_SIZE (=20)</CODE> bytes of space as the destination for storing the indicated hash.
66            </p></div>
67<h2>Revision History</h2>
68    <div class="section">
69      <dl class="history">
70        <dt>2011/03/04</dt>
71<dd>Added note about 4-byte alignment restriction.<br />
72        </dd>
73        <dt>2010/01/07</dt>
74<dd>Initial version.<br />
75        </dd>
76      </dl>
77    </div>
78  <hr><p>CONFIDENTIAL</p></body>
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