01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: /**
19: * @author Vladimir N. Molotkov
20: * @version $Revision$
21: */package java.security.spec;
22:
23: import java.math.BigInteger;
24:
25: import org.apache.harmony.security.internal.nls.Messages;
26:
27: /**
28: * @com.intel.drl.spec_ref
29: *
30: */
31: public class ECFieldFp implements ECField {
32: // Prime
33: private final BigInteger p;
34:
35: /**
36: * @com.intel.drl.spec_ref
37: */
38: public ECFieldFp(BigInteger p) {
39: this .p = p;
40:
41: if (this .p == null) {
42: throw new NullPointerException(Messages.getString(
43: "security.83", "p")); //$NON-NLS-1$ //$NON-NLS-2$
44: }
45: if (this .p.signum() != 1) {
46: throw new IllegalArgumentException(Messages.getString(
47: "security.86", "p")); //$NON-NLS-1$ //$NON-NLS-2$
48: }
49: }
50:
51: /**
52: * @com.intel.drl.spec_ref
53: */
54: public int getFieldSize() {
55: return p.bitLength();
56: }
57:
58: /**
59: * @com.intel.drl.spec_ref
60: */
61: public BigInteger getP() {
62: return p;
63: }
64:
65: /**
66: * @com.intel.drl.spec_ref
67: */
68: public boolean equals(Object obj) {
69: // object equals itself
70: if (this == obj) {
71: return true;
72: }
73: if (obj instanceof ECFieldFp) {
74: return (this .p.equals(((ECFieldFp) obj).p));
75: }
76: return false;
77: }
78:
79: /**
80: * @com.intel.drl.spec_ref
81: */
82: public int hashCode() {
83: return p.hashCode();
84: }
85: }
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