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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 Wed Nov 07 10:29:41 EST 2007 --><TITLE>TBCPadding (Bouncy Castle Library 1.38 API Specification)</TITLE><META NAME="keywords" CONTENT="org.bouncycastle.crypto.paddings.TBCPadding class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="TBCPadding (Bouncy Castle Library 1.38 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" 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</TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Bouncy Castle Cryptography Library 1.38</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../org/bouncycastle/crypto/paddings/PKCS7Padding.html" title="class in org.bouncycastle.crypto.paddings"><B>PREV CLASS</B></A> <A HREF="../../../../org/bouncycastle/crypto/paddings/X923Padding.html" title="class in org.bouncycastle.crypto.paddings"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html?org/bouncycastle/crypto/paddings/TBCPadding.html" target="_top"><B>FRAMES</B></A> <A HREF="TBCPadding.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.paddings</FONT><BR>Class TBCPadding</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.bouncycastle.crypto.paddings.TBCPadding</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html" title="interface in org.bouncycastle.crypto.paddings">BlockCipherPadding</A></DD></DL><HR><DL><DT><PRE>public class <B>TBCPadding</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html" title="interface in org.bouncycastle.crypto.paddings">BlockCipherPadding</A></DL></PRE><P>A padder that adds Trailing-Bit-Compliment padding to a block. <p> This padding pads the block out with the compliment of the last bit of the plain text. </p><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><CODE><B><A HREF="../../../../org/bouncycastle/crypto/paddings/TBCPadding.html#TBCPadding()">TBCPadding</A></B>()</CODE><BR> </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/paddings/TBCPadding.html#addPadding(byte[], int)">addPadding</A></B>(byte[] in, int inOff)</CODE><BR> add the pad bytes to the passed in block, returning the number of bytes added.</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/paddings/TBCPadding.html#getPaddingName()">getPaddingName</A></B>()</CODE><BR> Return the name of the algorithm the padder implements.</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/paddings/TBCPadding.html#init(java.security.SecureRandom)">init</A></B>(java.security.SecureRandom random)</CODE><BR> Initialise the padder.</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/paddings/TBCPadding.html#padCount(byte[])">padCount</A></B>(byte[] in)</CODE><BR> return the number of pad bytes present in the block.</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="TBCPadding()"><!-- --></A><H3>TBCPadding</H3><PRE>public <B>TBCPadding</B>()</PRE><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(java.security.SecureRandom)"><!-- --></A><H3>init</H3><PRE>public void <B>init</B>(java.security.SecureRandom random) throws java.lang.IllegalArgumentException</PRE><DL><DD>Initialise the padder.<P><DD><DL><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html#init(java.security.SecureRandom)">init</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html" title="interface in org.bouncycastle.crypto.paddings">BlockCipherPadding</A></CODE></DL></DD><DD><DL><DT><B>Parameters:</B><DD><CODE>random</CODE> - - a SecureRandom if available.<DT><B>Throws:</B><DD><CODE>java.lang.IllegalArgumentException</CODE></DL></DD></DL><HR><A NAME="getPaddingName()"><!-- --></A><H3>getPaddingName</H3><PRE>public java.lang.String <B>getPaddingName</B>()</PRE><DL><DD>Return the name of the algorithm the padder implements.<P><DD><DL><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html#getPaddingName()">getPaddingName</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html" title="interface in org.bouncycastle.crypto.paddings">BlockCipherPadding</A></CODE></DL></DD><DD><DL><DT><B>Returns:</B><DD>the name of the algorithm the padder implements.</DL></DD></DL><HR><A NAME="addPadding(byte[], int)"><!-- --></A><H3>addPadding</H3><PRE>public int <B>addPadding</B>(byte[] in, int inOff)</PRE><DL><DD>add the pad bytes to the passed in block, returning the number of bytes added. <p> Note: this assumes that the last block of plain text is always passed to it inside in. i.e. if inOff is zero, indicating the entire block is to be overwritten with padding the value of in should be the same as the last block of plain text. </p><P><DD><DL><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html#addPadding(byte[], int)">addPadding</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html" title="interface in org.bouncycastle.crypto.paddings">BlockCipherPadding</A></CODE></DL></DD><DD><DL></DL></DD></DL><HR><A NAME="padCount(byte[])"><!-- --></A><H3>padCount</H3><PRE>public int <B>padCount</B>(byte[] in) throws <A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></PRE><DL><DD>return the number of pad bytes present in the block.<P><DD><DL><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html#padCount(byte[])">padCount</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/paddings/BlockCipherPadding.html" title="interface in org.bouncycastle.crypto.paddings">BlockCipherPadding</A></CODE></DL></DD><DD><DL><DT><B>Throws:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></CODE> - if the padding is badly formed or invalid.</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 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