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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 15:50:43 EST 2006 --><TITLE>org.bouncycastle.crypto (Bouncy Castle Library 1.34 API Specification)</TITLE><META NAME="keywords" CONTENT="org.bouncycastle.crypto package"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="org.bouncycastle.crypto (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" 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="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</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/asn1/x9/package-summary.html"><B>PREV PACKAGE</B></A> <A HREF="../../../org/bouncycastle/crypto/agreement/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?org/bouncycastle/crypto/package-summary.html" target="_top"><B>FRAMES</B></A> <A HREF="package-summary.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></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><H2>Package org.bouncycastle.crypto</H2>Base classes for the lightweight API.<P><B>See:</B><BR> <A HREF="#package_description"><B>Description</B></A><P><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Interface Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html" title="interface in org.bouncycastle.crypto">AsymmetricBlockCipher</A></B></TD><TD>base interface that a public/private key block cipher needs to conform to.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/AsymmetricCipherKeyPairGenerator.html" title="interface in org.bouncycastle.crypto">AsymmetricCipherKeyPairGenerator</A></B></TD><TD>interface that a public/private key pair generator should conform to.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/BasicAgreement.html" title="interface in org.bouncycastle.crypto">BasicAgreement</A></B></TD><TD>The basic interface that basic Diffie-Hellman implementations conforms to.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/BlockCipher.html" title="interface in org.bouncycastle.crypto">BlockCipher</A></B></TD><TD>Block cipher engines are expected to conform to this interface.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/CipherParameters.html" title="interface in org.bouncycastle.crypto">CipherParameters</A></B></TD><TD>all parameter classes implement this.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/DerivationFunction.html" title="interface in org.bouncycastle.crypto">DerivationFunction</A></B></TD><TD>base interface for general purpose byte derivation functions.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/DerivationParameters.html" title="interface in org.bouncycastle.crypto">DerivationParameters</A></B></TD><TD>Parameters for key/byte stream derivation classes</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/Digest.html" title="interface in org.bouncycastle.crypto">Digest</A></B></TD><TD>interface that a message digest conforms to.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/DSA.html" title="interface in org.bouncycastle.crypto">DSA</A></B></TD><TD>interface for classes implementing algorithms modeled similar to the Digital Signature Alorithm.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/ExtendedDigest.html" title="interface in org.bouncycastle.crypto">ExtendedDigest</A></B></TD><TD> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/Mac.html" title="interface in org.bouncycastle.crypto">Mac</A></B></TD><TD>The base interface for implementations of message authentication codes (MACs).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/Signer.html" title="interface in org.bouncycastle.crypto">Signer</A></B></TD><TD>Generic signer interface for hash based and message recovery signers.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/SignerWithRecovery.html" title="interface in org.bouncycastle.crypto">SignerWithRecovery</A></B></TD><TD>Signer with message recovery.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/StreamCipher.html" title="interface in org.bouncycastle.crypto">StreamCipher</A></B></TD><TD>the interface stream ciphers conform to.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/Wrapper.html" title="interface in org.bouncycastle.crypto">Wrapper</A></B></TD><TD> </TD></TR></TABLE> <P><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Class Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/AsymmetricCipherKeyPair.html" title="class in org.bouncycastle.crypto">AsymmetricCipherKeyPair</A></B></TD><TD>a holding class for public/private parameter pairs.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/BufferedAsymmetricBlockCipher.html" title="class in org.bouncycastle.crypto">BufferedAsymmetricBlockCipher</A></B></TD><TD>a buffer wrapper for an asymmetric block cipher, allowing input to be accumulated in a piecemeal fashion until final processing.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/BufferedBlockCipher.html" title="class in org.bouncycastle.crypto">BufferedBlockCipher</A></B></TD><TD>A wrapper class that allows block ciphers to be used to process data in a piecemeal fashion.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/CipherKeyGenerator.html" title="class in org.bouncycastle.crypto">CipherKeyGenerator</A></B></TD><TD>The base class for symmetric, or secret, cipher key generators.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/KeyGenerationParameters.html" title="class in org.bouncycastle.crypto">KeyGenerationParameters</A></B></TD><TD>The base class for parameters to key generators.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/PBEParametersGenerator.html" title="class in org.bouncycastle.crypto">PBEParametersGenerator</A></B></TD><TD>super class for all Password Based Encryption (PBE) parameter generator classes.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/StreamBlockCipher.html" title="class in org.bouncycastle.crypto">StreamBlockCipher</A></B></TD><TD>a wrapper for block ciphers with a single byte block size, so that they can be treated like stream ciphers.</TD></TR></TABLE> <P><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Exception Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/CryptoException.html" title="class in org.bouncycastle.crypto">CryptoException</A></B></TD><TD>the foundation class for the hard exceptions thrown by the crypto packages.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/DataLengthException.html" title="class in org.bouncycastle.crypto">DataLengthException</A></B></TD><TD>this exception is thrown if a buffer that is meant to have output copied into it turns out to be too short, or if we've been given insufficient input.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></B></TD><TD>this exception is thrown whenever we find something we don't expect in a message.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../org/bouncycastle/crypto/RuntimeCryptoException.html" title="class in org.bouncycastle.crypto">RuntimeCryptoException</A></B></TD><TD>the foundation class for the exceptions thrown by the crypto packages.</TD></TR></TABLE> <P><A NAME="package_description"><!-- --></A><H2>Package org.bouncycastle.crypto Description</H2><P>Base classes for the lightweight API.<P><P><DL></DL><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="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</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/asn1/x9/package-summary.html"><B>PREV PACKAGE</B></A> <A 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