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7    <title>DecryptAndVerifyAes128Ccm</title>
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10    <h1><CODE><a href="../../nn/Overview.html">nn</a>::<a href="../../nn/crypto/Overview.html">crypto</a>::DecryptAndVerifyAes128Ccm</CODE> Function</h1>
11    <h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">
14bool DecryptAndVerifyAes128Ccm(
15     void * pDst,
16     const void * pSrc,
17     size_t srcSize,
18     const void * pKey
19);
20</pre>
21    </div>
22    <h2>Parameters</h2>
23    <div class="section">
24      <table class="arguments">
25        <thead>
26          <tr>
27            <td width="15" />
28            <th>Name</th>
29            <td>Description</td>
30          </tr>
31        </thead>
32        <tr>
33          <td>out</td>
34          <th>pDst</th>
35          <td>Pointer to the buffer storing the decryption results. This buffer must be at least as big as <SPAN class="argument">srcSize</SPAN> - <CODE><a href="../../nn/crypto/GENERATE_HEADER_SIZE.html">GENERATE_HEADER_SIZE</a></CODE>.</td>
36        </tr>
37        <tr>
38          <td>in</td>
39          <th>pSrc</th>
40          <td>Pointer to the buffer storing the ciphertext.</td>
41        </tr>
42        <tr>
43          <td>in</td>
44          <th>srcSize</th>
45          <td>Ciphertext size in bytes.</td>
46        </tr>
47        <tr>
48          <td>in</td>
49          <th>pKey</th>
50          <td>Pointer to the buffer storing the key. The key is 16 bytes in length.</td>
51        </tr> </table>
52    </div>
53    <h2>Return Values</h2>
54    <div class="section">Returns whether the validity test succeeded. If <CODE>TRUE</CODE>, there is likely no tampering. If <CODE>FALSE</CODE>, the file has likely been tampered with. </div>
55    <h2>Description</h2>
56    <div class="section">
57      <p>Decrypts and tests for tampering.<BR></p><p>Decrypts data encrypted using the <CODE><a href="../../nn/crypto/EncryptAndGenerateAes128Ccm.html">EncryptAndGenerateAes128Ccm</a></CODE> function, and tests the decrypted data to see if it has been tampered with.</p><p>Data decrypted by this function is reduced in size by <CODE><a href="../../nn/crypto/GENERATE_HEADER_SIZE.html">GENERATE_HEADER_SIZE</a></CODE> (that is, 16) bytes. Consequently, the buffer pointed to by <SPAN class="argument">pDst</SPAN> must be big enough to hold <SPAN class="argument">srcSize</SPAN> - <CODE><a href="../../nn/crypto/GENERATE_HEADER_SIZE.html">GENERATE_HEADER_SIZE</a></CODE> bytes of data.</p><!-- write here --></div>
58    <h2>Revision History</h2>
59    <div class="section">
60      <dl class="history">
61        <dt>2011/10/27</dt>
62        <dd>Initial version.<br />
63        </dd>
64      </dl>
65    </div>
66  <hr><p>CONFIDENTIAL</p></body>
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