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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 15:50:35 EST 2006 --><TITLE>BaseKDFBytesGenerator (Bouncy Castle Library 1.34 API Specification)</TITLE><META NAME="keywords" CONTENT="org.bouncycastle.crypto.generators.BaseKDFBytesGenerator class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="BaseKDFBytesGenerator (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 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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"> PREV CLASS <A HREF="../../../../org/bouncycastle/crypto/generators/DESedeKeyGenerator.html" title="class in org.bouncycastle.crypto.generators"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html?org/bouncycastle/crypto/generators/BaseKDFBytesGenerator.html" target="_top"><B>FRAMES</B></A> <A HREF="BaseKDFBytesGenerator.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 | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <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.generators</FONT><BR>Class BaseKDFBytesGenerator</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.bouncycastle.crypto.generators.BaseKDFBytesGenerator</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/bouncycastle/crypto/DerivationFunction.html" title="interface in org.bouncycastle.crypto">DerivationFunction</A></DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../org/bouncycastle/crypto/generators/KDF1BytesGenerator.html" title="class in org.bouncycastle.crypto.generators">KDF1BytesGenerator</A>, <A HREF="../../../../org/bouncycastle/crypto/generators/KDF2BytesGenerator.html" title="class in org.bouncycastle.crypto.generators">KDF2BytesGenerator</A></DD></DL><HR><DL><DT><PRE>public class <B>BaseKDFBytesGenerator</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../../org/bouncycastle/crypto/DerivationFunction.html" title="interface in org.bouncycastle.crypto">DerivationFunction</A></DL></PRE><P>Basic KDF generator for derived keys and ivs as defined by IEEE P1363a/ISO 18033 <br> This implementation is based on ISO 18033/P1363a.<P><P><HR><P><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_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>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected </CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/bouncycastle/crypto/generators/BaseKDFBytesGenerator.html#BaseKDFBytesGenerator(int, org.bouncycastle.crypto.Digest)">BaseKDFBytesGenerator</A></B>(int counterStart, <A HREF="../../../../org/bouncycastle/crypto/Digest.html" title="interface in org.bouncycastle.crypto">Digest</A> digest)</CODE><BR> Construct a KDF Parameters generator.</TD></TR></TABLE> <!-- ========== 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/generators/BaseKDFBytesGenerator.html#generateBytes(byte[], int, int)">generateBytes</A></B>(byte[] out, int outOff, int len)</CODE><BR> fill len bytes of the output buffer with bytes generated from the derivation function.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../org/bouncycastle/crypto/Digest.html" title="interface in org.bouncycastle.crypto">Digest</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/bouncycastle/crypto/generators/BaseKDFBytesGenerator.html#getDigest()">getDigest</A></B>()</CODE><BR> return the underlying 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/generators/BaseKDFBytesGenerator.html#init(org.bouncycastle.crypto.DerivationParameters)">init</A></B>(<A HREF="../../../../org/bouncycastle/crypto/DerivationParameters.html" title="interface in org.bouncycastle.crypto">DerivationParameters</A> param)</CODE><BR> </TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_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>Constructor Detail</B></FONT></TH></TR></TABLE><A NAME="BaseKDFBytesGenerator(int, org.bouncycastle.crypto.Digest)"><!-- --></A><H3>BaseKDFBytesGenerator</H3><PRE>protected <B>BaseKDFBytesGenerator</B>(int counterStart, <A HREF="../../../../org/bouncycastle/crypto/Digest.html" title="interface in org.bouncycastle.crypto">Digest</A> digest)</PRE><DL><DD>Construct a KDF Parameters generator. <p><P><DL><DT><B>Parameters:</B><DD><CODE>counterStart</CODE> - value of counter.<DD><CODE>digest</CODE> - the digest to be used as the source of derived keys.</DL></DL><!-- ============ 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(org.bouncycastle.crypto.DerivationParameters)"><!-- --></A><H3>init</H3><PRE>public void <B>init</B>(<A HREF="../../../../org/bouncycastle/crypto/DerivationParameters.html" title="interface in org.bouncycastle.crypto">DerivationParameters</A> param)</PRE><DL><DD><DL><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/DerivationFunction.html#init(org.bouncycastle.crypto.DerivationParameters)">init</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/DerivationFunction.html" title="interface in org.bouncycastle.crypto">DerivationFunction</A></CODE></DL></DD><DD><DL></DL></DD></DL><HR><A NAME="getDigest()"><!-- --></A><H3>getDigest</H3><PRE>public <A HREF="../../../../org/bouncycastle/crypto/Digest.html" title="interface in org.bouncycastle.crypto">Digest</A> <B>getDigest</B>()</PRE><DL><DD>return the underlying digest.<P><DD><DL><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/DerivationFunction.html#getDigest()">getDigest</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/DerivationFunction.html" title="interface in org.bouncycastle.crypto">DerivationFunction</A></CODE></DL></DD><DD><DL></DL></DD></DL><HR><A NAME="generateBytes(byte[], int, int)"><!-- --></A><H3>generateBytes</H3><PRE>public int <B>generateBytes</B>(byte[] out, int outOff, int len) throws <A HREF="../../../../org/bouncycastle/crypto/DataLengthException.html" title="class in org.bouncycastle.crypto">DataLengthException</A>, java.lang.IllegalArgumentException</PRE><DL><DD>fill len bytes of the output buffer with bytes generated from the derivation function.<P><DD><DL><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/DerivationFunction.html#generateBytes(byte[], int, int)">generateBytes</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/DerivationFunction.html" title="interface in org.bouncycastle.crypto">DerivationFunction</A></CODE></DL></DD><DD><DL><DT><B>Throws:</B><DD><CODE>java.lang.IllegalArgumentException</CODE> - if the size of the request will cause an overflow.<DD><CODE><A HREF="../../../../org/bouncycastle/crypto/DataLengthException.html" title="class in org.bouncycastle.crypto">DataLengthException</A></CODE> - if the out buffer is too small.</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 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