1 /* 2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package java.security.spec; 26 27 import java.math.BigInteger; 28 import java.util.Arrays; 29 30 /** 31 * This interface represents an elliptic curve (EC) finite field. 32 * All specialized EC fields must implements this interface. 33 * 34 * @see ECFieldFp 35 * @see ECFieldF2m 36 * 37 * @author Valerie Peng 38 * 39 * @since 1.5 40 */ 41 public interface ECField { 42 /** 43 * Returns the field size in bits. Note: For prime finite 44 * field ECFieldFp, size of prime p in bits is returned. 45 * For characteristic 2 finite field ECFieldF2m, m is returned. 46 * @return the field size in bits. 47 */ getFieldSize()48 int getFieldSize(); 49 } 50