1 /*
2 * Copyright (c) 2009, 2014, 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
26 package sun.security.ec;
27
28 import java.math.BigInteger;
29 import java.security.*;
30 import java.security.spec.AlgorithmParameterSpec;
31 import java.security.spec.ECGenParameterSpec;
32 import java.security.spec.ECParameterSpec;
33 import java.security.spec.ECPoint;
34
35 import sun.security.ec.NamedCurve;
36 import sun.security.ec.ECParameters;
37 import sun.security.ec.ECPrivateKeyImpl;
38 import sun.security.ec.ECPublicKeyImpl;
39 import sun.security.jca.JCAUtil;
40 import sun.security.util.ECUtil;
41
42 /**
43 * EC keypair generator.
44 * Standard algorithm, minimum key length is 112 bits, maximum is 571 bits.
45 *
46 * @since 1.7
47 */
48 public final class ECKeyPairGenerator extends KeyPairGeneratorSpi {
49
50 private static final int KEY_SIZE_MIN = 112; // min bits (see ecc_impl.h)
51 private static final int KEY_SIZE_MAX = 571; // max bits (see ecc_impl.h)
52 private static final int KEY_SIZE_DEFAULT = 256;
53
54 // used to seed the keypair generator
55 private SecureRandom random;
56
57 // size of the key to generate, KEY_SIZE_MIN <= keySize <= KEY_SIZE_MAX
58 private int keySize;
59
60 // parameters specified via init, if any
61 private AlgorithmParameterSpec params = null;
62
63 /**
64 * Constructs a new ECKeyPairGenerator.
65 */
66 public ECKeyPairGenerator() {
67 // initialize to default in case the app does not call initialize()
68 initialize(KEY_SIZE_DEFAULT, null);
69 }
70
71 // initialize the generator. See JCA doc
72 @Override
73 public void initialize(int keySize, SecureRandom random) {
74
75 checkKeySize(keySize);
76 this.params = ECUtil.getECParameterSpec(null, keySize);
77 if (params == null) {
78 throw new InvalidParameterException(
79 "No EC parameters available for key size " + keySize + " bits");
80 }
81 this.random = random;
82 }
83
84 // second initialize method. See JCA doc
85 @Override
86 public void initialize(AlgorithmParameterSpec params, SecureRandom random)
87 throws InvalidAlgorithmParameterException {
88
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1 /*
2 * Copyright (c) 2009, 2017, 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
26 package sun.security.ec;
27
28 import java.math.BigInteger;
29 import java.security.*;
30 import java.security.spec.AlgorithmParameterSpec;
31 import java.security.spec.ECGenParameterSpec;
32 import java.security.spec.ECParameterSpec;
33 import java.security.spec.ECPoint;
34
35 import sun.security.ec.NamedCurve;
36 import sun.security.ec.ECParameters;
37 import sun.security.ec.ECPrivateKeyImpl;
38 import sun.security.ec.ECPublicKeyImpl;
39 import sun.security.jca.JCAUtil;
40 import sun.security.util.ECUtil;
41 import static sun.security.util.SecurityProviderConstants.DEF_EC_KEY_SIZE;
42
43 /**
44 * EC keypair generator.
45 * Standard algorithm, minimum key length is 112 bits, maximum is 571 bits.
46 *
47 * @since 1.7
48 */
49 public final class ECKeyPairGenerator extends KeyPairGeneratorSpi {
50
51 private static final int KEY_SIZE_MIN = 112; // min bits (see ecc_impl.h)
52 private static final int KEY_SIZE_MAX = 571; // max bits (see ecc_impl.h)
53
54 // used to seed the keypair generator
55 private SecureRandom random;
56
57 // size of the key to generate, KEY_SIZE_MIN <= keySize <= KEY_SIZE_MAX
58 private int keySize;
59
60 // parameters specified via init, if any
61 private AlgorithmParameterSpec params = null;
62
63 /**
64 * Constructs a new ECKeyPairGenerator.
65 */
66 public ECKeyPairGenerator() {
67 // initialize to default in case the app does not call initialize()
68 initialize(DEF_EC_KEY_SIZE, null);
69 }
70
71 // initialize the generator. See JCA doc
72 @Override
73 public void initialize(int keySize, SecureRandom random) {
74
75 checkKeySize(keySize);
76 this.params = ECUtil.getECParameterSpec(null, keySize);
77 if (params == null) {
78 throw new InvalidParameterException(
79 "No EC parameters available for key size " + keySize + " bits");
80 }
81 this.random = random;
82 }
83
84 // second initialize method. See JCA doc
85 @Override
86 public void initialize(AlgorithmParameterSpec params, SecureRandom random)
87 throws InvalidAlgorithmParameterException {
88
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