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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_02) on Wed Mar 22 19:19:09 PST 2006 --><TITLE>ECKey (Java Card API and Subsets)</TITLE><META NAME="keywords" CONTENT="javacard.security.ECKey interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="ECKey (Java Card API and Subsets)";}</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="class-use/ECKey.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </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>Java Card </b><br><font size="-1">v2.2.2</font></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../javacard/security/DSAPublicKey.html" title="interface in javacard.security"><B>PREV CLASS</B></A> <A HREF="../../javacard/security/ECPrivateKey.html" title="interface in javacard.security"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html?javacard/security/ECKey.html" target="_top"><B>FRAMES</B></A> <A HREF="ECKey.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">javacard.security</FONT><BR>Interface ECKey</H2><DL><DT><B>All Known Subinterfaces:</B> <DD><A HREF="../../javacard/security/ECPrivateKey.html" title="interface in javacard.security">ECPrivateKey</A>, <A HREF="../../javacard/security/ECPublicKey.html" title="interface in javacard.security">ECPublicKey</A></DD></DL><HR><DL><DT><PRE>public interface <B>ECKey</B></DL></PRE><P>The <CODE>ECKey</CODE> interface is the base interface for the EC algorithm's private and public key implementations. An EC private key implementation must also implement the <CODE>ECPrivateKey</CODE> interface methods. An EC public key implementation must also implement the <CODE>ECPublicKey</CODE> interface methods. <p>The equation of the curves for keys of type <CODE>TYPE_EC_FP_PUBLIC</CODE> or <CODE>TYPE_EC_FP_PRIVATE</CODE> is y^2 = x^3 + A * x + B. The equation of the curves for keys of type <CODE>TYPE_EC_F2M_PUBLIC</CODE> or <CODE>TYPE_EC_F2M_PRIVATE</CODE> is y^2 + x * y = x^3 + A * x^2 + B. <p>The notation used to describe parameters specific to the EC algorithm is based on the naming conventions established in [IEEE P1363].<P><P><DL><DT><B>Version:</B></DT> <DD>1.0</DD><DT><B>See Also:</B><DD><A HREF="../../javacard/security/ECPublicKey.html" title="interface in javacard.security"><CODE>ECPublicKey</CODE></A>, <A HREF="../../javacard/security/ECPrivateKey.html" title="interface in javacard.security"><CODE>ECPrivateKey</CODE></A>, <A HREF="../../javacard/security/KeyBuilder.html" title="class in javacard.security"><CODE>KeyBuilder</CODE></A>, <A HREF="../../javacard/security/Signature.html" title="class in javacard.security"><CODE>Signature</CODE></A>, <A HREF="../../javacardx/crypto/KeyEncryption.html" title="interface in javacardx.crypto"><CODE>javacardx.crypto.KeyEncryption</CODE></A>, <A HREF="../../javacard/security/KeyAgreement.html" title="class in javacard.security"><CODE>KeyAgreement</CODE></A></DL><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> short</CODE></FONT></TD><TD><CODE><B><A HREF="../../javacard/security/ECKey.html#getA(byte[], short)">getA</A></B>(byte[] buffer, short offset)</CODE><BR> Returns the first coefficient of the curve of the key.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> short</CODE></FONT></TD><TD><CODE><B><A HREF="../../javacard/security/ECKey.html#getB(byte[], short)">getB</A></B>(byte[] buffer, short offset)</CODE><BR> Returns the second coefficient of the curve of the key.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> short</CODE></FONT></TD><TD><CODE><B><A HREF="../../javacard/security/ECKey.html#getField(byte[], short)">getField</A></B>(byte[] buffer, short offset)</CODE><BR> Returns the field specification parameter value of the key.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> short</CODE></FONT></TD><TD><CODE><B><A HREF="../../javacard/security/ECKey.html#getG(byte[], short)">getG</A></B>(byte[] buffer, short offset)</CODE><BR> Returns the fixed point of the curve.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> short</CODE></FONT></TD><TD><CODE><B><A HREF="../../javacard/security/ECKey.html#getK()">getK</A></B>()</CODE><BR> Returns the cofactor of the order of the fixed point G of the curve.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> short</CODE></FONT></TD><TD><CODE><B><A HREF="../../javacard/security/ECKey.html#getR(byte[], short)">getR</A></B>(byte[] buffer, short offset)</CODE><BR> Returns the order of the fixed point G of the curve.</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="../../javacard/security/ECKey.html#setA(byte[], short, short)">setA</A></B>(byte[] buffer, short offset, short length)</CODE><BR> Sets the first coefficient of the curve of the key.</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="../../javacard/security/ECKey.html#setB(byte[], short, short)">setB</A></B>(byte[] buffer, short offset, short length)</CODE><BR> Sets the second coefficient of the curve of the key.</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="../../javacard/security/ECKey.html#setFieldF2M(short)">setFieldF2M</A></B>(short e)</CODE><BR> Sets the field specification parameter value for keys of type <CODE>TYPE_EC_F2M_PUBLIC</CODE> or <CODE>TYPE_EC_F2M_PRIVATE</CODE> in the case where the polynomial is a trinomial, of the form x^n + x^e + 1 (where n is the bit length of the key).</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="../../javacard/security/ECKey.html#setFieldF2M(short, short, short)">setFieldF2M</A></B>(short e1, short e2, short e3)</CODE><BR> Sets the field specification parameter value for keys of type <CODE>TYPE_EC_F2M_PUBLIC</CODE> or <CODE>TYPE_EC_F2M_PRIVATE</CODE> in the case where the polynomial is a pentanomial, of the form x^n + x^e1 + x^e2 + x^e3 + 1 (where n is the bit length of the key).</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="../../javacard/security/ECKey.html#setFieldFP(byte[], short, short)">setFieldFP</A></B>(byte[] buffer, short offset, short length)</CODE><BR> Sets the field specification parameter value for keys of type <CODE>TYPE_EC_FP_PRIVATE</CODE> or <CODE>TYPE_EC_FP_PUBLIC</CODE>.</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="../../javacard/security/ECKey.html#setG(byte[], short, short)">setG</A></B>(byte[] buffer, short offset, short length)</CODE><BR> Sets the fixed point of the curve.</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="../../javacard/security/ECKey.html#setK(short)">setK</A></B>(short K)</CODE><BR>⌨️ 快捷键说明
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