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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 15:50:36 EST 2006 --><TITLE>BlockCipherPadding (Bouncy Castle Library 1.34 API Specification)</TITLE><META NAME="keywords" CONTENT="org.bouncycastle.crypto.paddings.BlockCipherPadding interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="BlockCipherPadding (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="#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"> PREV CLASS <A HREF="../../../../org/bouncycastle/crypto/paddings/ISO10126d2Padding.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/BlockCipherPadding.html" target="_top"><B>FRAMES</B></A> <A HREF="BlockCipherPadding.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.paddings</FONT><BR>Interface BlockCipherPadding</H2><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../org/bouncycastle/crypto/paddings/ISO10126d2Padding.html" title="class in org.bouncycastle.crypto.paddings">ISO10126d2Padding</A>, <A HREF="../../../../org/bouncycastle/crypto/paddings/ISO7816d4Padding.html" title="class in org.bouncycastle.crypto.paddings">ISO7816d4Padding</A>, <A HREF="../../../../org/bouncycastle/crypto/paddings/PKCS7Padding.html" title="class in org.bouncycastle.crypto.paddings">PKCS7Padding</A>, <A HREF="../../../../org/bouncycastle/crypto/paddings/TBCPadding.html" title="class in org.bouncycastle.crypto.paddings">TBCPadding</A>, <A HREF="../../../../org/bouncycastle/crypto/paddings/X923Padding.html" title="class in org.bouncycastle.crypto.paddings">X923Padding</A>, <A HREF="../../../../org/bouncycastle/crypto/paddings/ZeroBytePadding.html" title="class in org.bouncycastle.crypto.paddings">ZeroBytePadding</A></DD></DL><HR><DL><DT><PRE>public interface <B>BlockCipherPadding</B></DL></PRE><P>Block cipher padders are expected to conform to this interface<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/paddings/BlockCipherPadding.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/BlockCipherPadding.html#getPaddingName()">getPaddingName</A></B>()</CODE><BR> Return the name of the algorithm the cipher 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/BlockCipherPadding.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/BlockCipherPadding.html#padCount(byte[])">padCount</A></B>(byte[] in)</CODE><BR> return the number of pad bytes present in the block.</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(java.security.SecureRandom)"><!-- --></A><H3>init</H3><PRE>void <B>init</B>(java.security.SecureRandom random) throws java.lang.IllegalArgumentException</PRE><DL><DD>Initialise the padder.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>random</CODE> - the source of randomness for the padding, if required.<DT><B>Throws:</B><DD><CODE>java.lang.IllegalArgumentException</CODE></DL></DD></DL><HR><A NAME="getPaddingName()"><!-- --></A><H3>getPaddingName</H3><PRE>java.lang.String <B>getPaddingName</B>()</PRE><DL><DD>Return the name of the algorithm the cipher implements.<P><DD><DL><DT><B>Returns:</B><DD>the name of the algorithm the cipher implements.</DL></DD></DL><HR><A NAME="addPadding(byte[], int)"><!-- --></A><H3>addPadding</H3><PRE>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. The reason for this is that some modes such as "trailing bit compliment" base the padding on the last byte of plain text. </p><P><DD><DL></DL></DD></DL><HR><A NAME="padCount(byte[])"><!-- --></A><H3>padCount</H3><PRE>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>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 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"> PREV CLASS <A HREF="../../../../org/bouncycastle/crypto/paddings/ISO10126d2Padding.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/BlockCipherPadding.html" target="_top"><B>FRAMES</B></A> <A HREF="BlockCipherPadding.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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