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14<h1 align="left">MATH_CalcSHA1<img src="../../image/NTR.gif"align="middle"><img src="../../image/TWL.gif" align="middle"></H1>
15<H2>Syntax</H2>
16
17<dl>
18  <dd>
19  <PRE><CODE>#include &lt;nitro/math/dgt.h&gt;
20
21static inline void MATH_CalcSHA1( void* digest, const void* data, u32 dataLength );
22</CODE></PRE>
23  </dd>
24</dl><h2>Arguments</h2>
25
26<table border="1" width="100%">
27    <TR>
28<TD width="176"><em><strong><font face="Courier New">digest</font></strong></em></TD>
29<TD width="670">Pointer to the memory location that holds the calculated SHA-1 value.</TD>
30    </TR>
31    <TR>
32<TD width="176"><em><strong><font face="Courier New">data</font></strong></em></TD>
33<TD width="670">Pointer to the input data.</TD>
34    </TR>
35    <TR>
36<TD width="176"><em><strong><font face="Courier New">dataLength</font></strong></em></TD>
37<TD width="670">Size of the input data.</TD>
38    </TR>
39  </table>
40<h2>Return Values</h2>
41<p>None.</p>
42<H2>Description</H2>
43<P>This function calculates SHA-1. The length of the generated SHA-1 value is 160 bits, or <nobr><code>MATH_SHA1_DIGEST_SIZE (= 20)</code></nobr> bytes. Use the &quot;digest&quot; argument to pass an area that can store a value of this size. Any size and alignment position can be used for the input data.<BR> This is a utility function that successively calls the <CODE><A href="MATH_SHA1Init.html">MATH_SHA1Init</A></CODE>, <CODE><A href="MATH_SHA1Update.html">MATH_SHA1Update</A></CODE>, and <CODE><A href="MATH_SHA1GetHash.html">MATH_SHA1GetHash</A></CODE> functions. Internally, the <a href="MATHSHA1Context.html"><code>MATHSHA1Context</code></a> structure is allocated to the stack, so make sure that you have sufficient stack when calling the function. SHA-1 is an algorithm to find the message digest value. For details, see RFC (Request For Comments) 3174, which is published by IETF (The Internet Engineering Task Force).
44</P>
45<h2>See Also</h2>
46<P><CODE></CODE></P>
47<H2>Revision History</H2>
48<P>
492005/04/12 Initial version.
50</P>
51<hr><p>CONFIDENTIAL</p></body>
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