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13<h1 align="left">MATH_SHA256Init<img src="../../image/NTR.gif"align="middle"><img src="../../image/TWL.gif" align="middle"></H1>
14<H2>Syntax</H2>
15
16<dl>
17  <dd>
18  <PRE><CODE>#include &lt;nitro/math/dgt.h&gt;
19
20static inline void MATH_SHA256Init( <A href="MATHSHA256Context.html">MATHSHA256Context</A> *context );
21</CODE></PRE>
22  </dd>
23</dl><h2>Arguments</h2>
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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 to initialize. This structure is used for SHA-256 generation.</TD>
29    </TR>
30  </table>
31<h2>Return Values</h2>
32<p>None.</p>
33<H2>Description</H2>
34<P>This function initializes the <CODE><A href="MATHSHA256Context.html">MATHSHA256Context</A></CODE> context structure used for SHA-256 calculations. Make sure that this function is called before using the <CODE><A href="MATH_SHA256Update.html">MATH_SHA256Update</A></CODE> and <CODE><A href="MATH_SHA256GetHash.html">MATH_SHA256GetHash</A></CODE> functions.<BR>You can re-apply this function to a context structure that is already initialized. In this case, it will return the context structure to its initial state. SHA-256 is an algorithm to find the message digest value. For details, refer to the Federal Information Processing Standard, FIPS PUB 180-2.
35</P>
36<h2>See Also</h2>
37<P><CODE><A href="MATH_SHA256Update.html">MATH_SHA256Update</A>, <A href="MATH_SHA256GetHash.html">MATH_SHA256GetHash</A></CODE></P>
38<H2>Revision History</H2>
39<P>
402008/05/23 Initial version.
41</P>
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