1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one or more
4 * contributor license agreements. See the NOTICE file distributed with
5 * this work for additional information regarding copyright ownership.
6 * The ASF licenses this file to You under the Apache License, Version 2.0
7 * (the "License"); you may not use this file except in compliance with
8 * the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package org.apache.geronimo.util.asn1.sec;
20
21 import java.math.BigInteger;
22 import org.apache.geronimo.util.asn1.*;
23
24 /**
25 * the elliptic curve private key object from SEC 1
26 */
27 public class ECPrivateKeyStructure
28 extends ASN1Encodable
29 {
30 private ASN1Sequence seq;
31
32 public ECPrivateKeyStructure(
33 ASN1Sequence seq)
34 {
35 this.seq = seq;
36 }
37
38 public ECPrivateKeyStructure(
39 BigInteger key)
40 {
41 byte[] bytes = key.toByteArray();
42
43 if (bytes[0] == 0)
44 {
45 byte[] tmp = new byte[bytes.length - 1];
46
47 System.arraycopy(bytes, 1, tmp, 0, tmp.length);
48 bytes = tmp;
49 }
50
51 ASN1EncodableVector v = new ASN1EncodableVector();
52
53 v.add(new DERInteger(1));
54 v.add(new DEROctetString(bytes));
55
56 seq = new DERSequence(v);
57 }
58
59 public BigInteger getKey()
60 {
61 ASN1OctetString octs = (ASN1OctetString)seq.getObjectAt(1);
62
63 BigInteger k = new BigInteger(1, octs.getOctets());
64
65 return k;
66 }
67
68 public DERObject toASN1Object()
69 {
70 return seq;
71 }
72 }