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14<h1 align="left">MATH_SHA1GetHash<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_SHA1GetHash( <A href="MATHSHA1Context.html">MATHSHA1Context</A> *context, void* digest );
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">context</font></strong></em></TD>
29      <TD width="670">Pointer to the context structure used for SHA-1 generation.</TD>
30    </TR>
31    <TR>
32      <TD width="176"><em><strong><font face="Courier New">digest</font></strong></em></TD>
33      <TD width="670">Pointer to the memory location that holds the message digest value.</TD>
34    </TR>
35  </table>
36<h2>Return Values</h2>
37<p>None.</p>
38<H2>Description</H2>
39<P>This function gets the digest value using SHA-1. You must use the <CODE><A href="MATH_SHA1Init.html">MATH_SHA1Init</A></CODE> function to initialize the <CODE>context</CODE> argument and then use the <CODE><A href="MATH_SHA1Update.html">MATH_SHA1Update</A></CODE> function to provide the input data.<BR>The length of the generated message digest 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. This function rewrites <CODE>context</CODE> internally, so you cannot continue to use the same context with the <CODE><A href="MATH_SHA1Update.html">MATH_SHA1Update</A></CODE> function. <BR>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).
40</P>
41<h2>See Also</h2>
42<P><a href="MATH_SHA1Init.html"><code>MATH_SHA1Init</code></a>, <a href="MATH_SHA1Update.html"><code>MATH_SHA1Update</code></a></P>
43<H2>Revision History</H2>
44<P>
452005/07/11 Added to Description. <BR> 2005/04/12 Changed function name.<BR>2005/04/01 Initial version.
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47<hr><p>CONFIDENTIAL</p></body>
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