01 /*
02 * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any 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 * @version 1.11, 05/05/07
39 *
40 * @since 1.5
41 */
42 public interface ECField {
43 /**
44 * Returns the field size in bits. Note: For prime finite
45 * field ECFieldFp, size of prime p in bits is returned.
46 * For characteristic 2 finite field ECFieldF2m, m is returned.
47 * @return the field size in bits.
48 */
49 int getFieldSize();
50 }
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