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13<h1 align="left">NETSHA256Update</h1>
14<h2>Syntax</h2>
15
16<dl>
17  <dd>
18  <PRE><CODE>#include &lt;revolution/net.h&gt;
19
20void NETSHA256Update( <A href="NETSHA256Context.html">NETSHA256Context</A> *context, const void* input, u32 length );
21</CODE></PRE>
22  </dd>
23</dl><h2>Arguments</h2>
24
25<table border="1" width="100%">
26    <TR>
27      <TD width="176"><em><strong><font face="Courier New">context</font></strong></em></TD>
28      <TD width="670">Pointer to the context structure used for SHA-256 generation.</TD>
29    </TR>
30    <TR>
31      <TD width="176"><em><strong><font face="Courier New">input</font></strong></em></TD>
32      <TD width="670">Pointer to the input data.</TD>
33    </TR>
34    <TR>
35      <TD width="176"><em><strong><font face="Courier New">length</font></strong></em></TD>
36      <TD width="670">Size of the input data.</TD>
37    </TR>
38  </table>
39<h2>Return Values</h2>
40<p>None.</p>
41<H2>Description</H2>
42<P>This function updates the SHA-256 digest value based on the input data. The <em><strong><CODE>context</CODE></strong></em> argument must be initialized in advance with the <A href="NETSHA256Init.html"><CODE>NETSHA256Init</CODE></A> function.<BR><BR> Call this function as many times as needed, and then use the <A href="NETSHA256GetDigest.html"><CODE>NETSHA256GetDigest</CODE></A> function to obtain the digest value.</p>
43<p>Any size and alignment position can be used for the input data.</p>
44<p>
45For details, see the &quot;SHA-256&quot; section of the <a href="hash_overview.html">hash algorithm</a>.
46</P>
47<h2>See Also</h2>
48<P><CODE><A href="NETSHA256Init.html">NETSHA256Init</A><BR><A href="NETSHA256GetDigest.html">NETSHA256GetDigest</A></CODE></P>
49<H2>Revision History</H2>
50<P>
512008/05/07 Initial version.<BR>
52</P>
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