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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0_08) on Mon Oct 02 15:50:34 EST 2006 --><TITLE>Digest (Bouncy Castle Library 1.34 API Specification)</TITLE><META NAME="keywords" CONTENT="org.bouncycastle.crypto.Digest interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Digest (Bouncy Castle Library 1.34 API Specification)";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" 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ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Bouncy Castle Cryptography Library 1.34</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../org/bouncycastle/crypto/DerivationParameters.html" title="interface in org.bouncycastle.crypto"><B>PREV CLASS</B></A> <A HREF="../../../org/bouncycastle/crypto/DSA.html" title="interface in org.bouncycastle.crypto"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?org/bouncycastle/crypto/Digest.html" target="_top"><B>FRAMES</B></A> <A HREF="Digest.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.bouncycastle.crypto</FONT><BR>Interface Digest</H2><DL><DT><B>All Known Subinterfaces:</B> <DD><A HREF="../../../org/bouncycastle/crypto/ExtendedDigest.html" title="interface in org.bouncycastle.crypto">ExtendedDigest</A></DD></DL><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../org/bouncycastle/crypto/digests/GeneralDigest.html" title="class in org.bouncycastle.crypto.digests">GeneralDigest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/GOST3411Digest.html" title="class in org.bouncycastle.crypto.digests">GOST3411Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/LongDigest.html" title="class in org.bouncycastle.crypto.digests">LongDigest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/MD2Digest.html" title="class in org.bouncycastle.crypto.digests">MD2Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/MD4Digest.html" title="class in org.bouncycastle.crypto.digests">MD4Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/MD5Digest.html" title="class in org.bouncycastle.crypto.digests">MD5Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/RIPEMD128Digest.html" title="class in org.bouncycastle.crypto.digests">RIPEMD128Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/RIPEMD160Digest.html" title="class in org.bouncycastle.crypto.digests">RIPEMD160Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/RIPEMD256Digest.html" title="class in org.bouncycastle.crypto.digests">RIPEMD256Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/RIPEMD320Digest.html" title="class in org.bouncycastle.crypto.digests">RIPEMD320Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/SHA1Digest.html" title="class in org.bouncycastle.crypto.digests">SHA1Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/SHA224Digest.html" title="class in org.bouncycastle.crypto.digests">SHA224Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/SHA256Digest.html" title="class in org.bouncycastle.crypto.digests">SHA256Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/SHA384Digest.html" title="class in org.bouncycastle.crypto.digests">SHA384Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/SHA512Digest.html" title="class in org.bouncycastle.crypto.digests">SHA512Digest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/ShortenedDigest.html" title="class in org.bouncycastle.crypto.digests">ShortenedDigest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/TigerDigest.html" title="class in org.bouncycastle.crypto.digests">TigerDigest</A>, <A HREF="../../../org/bouncycastle/crypto/digests/WhirlpoolDigest.html" title="class in org.bouncycastle.crypto.digests">WhirlpoolDigest</A></DD></DL><HR><DL><DT><PRE>public interface <B>Digest</B></DL></PRE><P>interface that a message digest conforms to.<P><P><HR><P><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/bouncycastle/crypto/Digest.html#doFinal(byte[], int)">doFinal</A></B>(byte[] out, int outOff)</CODE><BR> close the digest, producing the final digest value.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.String</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/bouncycastle/crypto/Digest.html#getAlgorithmName()">getAlgorithmName</A></B>()</CODE><BR> return the algorithm name</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/bouncycastle/crypto/Digest.html#getDigestSize()">getDigestSize</A></B>()</CODE><BR> return the size, in bytes, of the digest produced by this message digest.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/bouncycastle/crypto/Digest.html#reset()">reset</A></B>()</CODE><BR> reset the digest back to it's initial state.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/bouncycastle/crypto/Digest.html#update(byte)">update</A></B>(byte in)</CODE><BR> update the message digest with a single byte.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/bouncycastle/crypto/Digest.html#update(byte[], int, int)">update</A></B>(byte[] in, int inOff, int len)</CODE><BR> update the message digest with a block of bytes.</TD></TR></TABLE> <P><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"><B>Method Detail</B></FONT></TH></TR></TABLE><A NAME="getAlgorithmName()"><!-- --></A><H3>getAlgorithmName</H3><PRE>java.lang.String <B>getAlgorithmName</B>()</PRE><DL><DD>return the algorithm name<P><DD><DL><DT><B>Returns:</B><DD>the algorithm name</DL></DD></DL><HR><A NAME="getDigestSize()"><!-- --></A><H3>getDigestSize</H3><PRE>int <B>getDigestSize</B>()</PRE><DL><DD>return the size, in bytes, of the digest produced by this message digest.<P><DD><DL><DT><B>Returns:</B><DD>the size, in bytes, of the digest produced by this message digest.</DL></DD></DL><HR><A NAME="update(byte)"><!-- --></A><H3>update</H3><PRE>void <B>update</B>(byte in)</PRE><DL><DD>update the message digest with a single byte.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>in</CODE> - the input byte to be entered.</DL></DD></DL><HR><A NAME="update(byte[], int, int)"><!-- --></A><H3>update</H3><PRE>void <B>update</B>(byte[] in, int inOff, int len)</PRE><DL><DD>update the message digest with a block of bytes.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>in</CODE> - the byte array containing the data.<DD><CODE>inOff</CODE> - the offset into the byte array where the data starts.<DD><CODE>len</CODE> - the length of the data.</DL></DD></DL><HR><A NAME="doFinal(byte[], int)"><!-- --></A><H3>doFinal</H3><PRE>int <B>doFinal</B>(byte[] out, int outOff)</PRE><DL><DD>close the digest, producing the final digest value. The doFinal call leaves the digest reset.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>out</CODE> - the array the digest is to be copied into.<DD><CODE>outOff</CODE> - the offset into the out array the digest is to start at.</DL></DD></DL><HR><A NAME="reset()"><!-- --></A><H3>reset</H3><PRE>void <B>reset</B>()</PRE><DL><DD>reset the digest back to it's initial state.<P><DD><DL></DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ======= START OF BOTTOM NAVBAR ====== --><A NAME="navbar_bottom"><!-- --></A><A HREF="#skip-navbar_bottom" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Bouncy Castle Cryptography Library 1.34</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../org/bouncycastle/crypto/DerivationParameters.html" title="interface in org.bouncycastle.crypto"><B>PREV CLASS</B></A> <A HREF="../../../org/bouncycastle/crypto/DSA.html" title="interface in org.bouncycastle.crypto"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?org/bouncycastle/crypto/Digest.html" target="_top"><B>FRAMES</B></A> <A HREF="Digest.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_bottom"></A><!-- ======== END OF BOTTOM NAVBAR ======= --><HR></BODY></HTML>?? 快捷鍵說(shuō)明
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