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| 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 | + */ | |
| 48 | + int getFieldSize(); | |
| 49 | +} | |