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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>DSA (Bouncy Castle Library 1.34 API Specification)</TITLE><META NAME="keywords" CONTENT="org.bouncycastle.crypto.DSA interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="DSA (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/Digest.html" title="interface in org.bouncycastle.crypto"><B>PREV CLASS</B></A> <A HREF="../../../org/bouncycastle/crypto/ExtendedDigest.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/DSA.html" target="_top"><B>FRAMES</B></A> <A HREF="DSA.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 DSA</H2><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../org/bouncycastle/crypto/signers/DSASigner.html" title="class in org.bouncycastle.crypto.signers">DSASigner</A>, <A HREF="../../../org/bouncycastle/crypto/signers/ECDSASigner.html" title="class in org.bouncycastle.crypto.signers">ECDSASigner</A>, <A HREF="../../../org/bouncycastle/crypto/signers/ECGOST3410Signer.html" title="class in org.bouncycastle.crypto.signers">ECGOST3410Signer</A>, <A HREF="../../../org/bouncycastle/crypto/signers/ECNRSigner.html" title="class in org.bouncycastle.crypto.signers">ECNRSigner</A>, <A HREF="../../../org/bouncycastle/crypto/signers/GOST3410Signer.html" title="class in org.bouncycastle.crypto.signers">GOST3410Signer</A></DD></DL><HR><DL><DT><PRE>public interface <B>DSA</B></DL></PRE><P>interface for classes implementing algorithms modeled similar to the Digital Signature Alorithm.<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> java.math.BigInteger[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/bouncycastle/crypto/DSA.html#generateSignature(byte[])">generateSignature</A></B>(byte[] message)</CODE><BR> sign the passed in message (usually the output of a hash function).</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/DSA.html#init(boolean, org.bouncycastle.crypto.CipherParameters)">init</A></B>(boolean forSigning, <A HREF="../../../org/bouncycastle/crypto/CipherParameters.html" title="interface in org.bouncycastle.crypto">CipherParameters</A> param)</CODE><BR> initialise the signer for signature generation or signature verification.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/bouncycastle/crypto/DSA.html#verifySignature(byte[], java.math.BigInteger, java.math.BigInteger)">verifySignature</A></B>(byte[] message, java.math.BigInteger r, java.math.BigInteger s)</CODE><BR> verify the message message against the signature values r and s.</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="init(boolean, org.bouncycastle.crypto.CipherParameters)"><!-- --></A><H3>init</H3><PRE>void <B>init</B>(boolean forSigning, <A HREF="../../../org/bouncycastle/crypto/CipherParameters.html" title="interface in org.bouncycastle.crypto">CipherParameters</A> param)</PRE><DL><DD>initialise the signer for signature generation or signature verification.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>forSigning</CODE> - true if we are generating a signature, false otherwise.<DD><CODE>param</CODE> - key parameters for signature generation.</DL></DD></DL><HR><A NAME="generateSignature(byte[])"><!-- --></A><H3>generateSignature</H3><PRE>java.math.BigInteger[] <B>generateSignature</B>(byte[] message)</PRE><DL><DD>sign the passed in message (usually the output of a hash function).<P><DD><DL><DT><B>Parameters:</B><DD><CODE>message</CODE> - the message to be signed.<DT><B>Returns:</B><DD>two big integers representing the r and s values respectively.</DL></DD></DL><HR><A NAME="verifySignature(byte[], java.math.BigInteger, java.math.BigInteger)"><!-- --></A><H3>verifySignature</H3><PRE>boolean <B>verifySignature</B>(byte[] message, java.math.BigInteger r, java.math.BigInteger s)</PRE><DL><DD>verify the message message against the signature values r and s.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>message</CODE> - the message that was supposed to have been signed.<DD><CODE>r</CODE> - the r signature value.<DD><CODE>s</CODE> - the s signature value.</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 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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/Digest.html" title="interface in org.bouncycastle.crypto"><B>PREV CLASS</B></A> <A HREF="../../../org/bouncycastle/crypto/ExtendedDigest.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/DSA.html" target="_top"><B>FRAMES</B></A> <A HREF="DSA.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>?? 快捷鍵說明
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