1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
package org.spongycastle.asn1.sec;
import java.math.BigInteger;
import java.util.Enumeration;
import org.spongycastle.asn1.ASN1Encodable;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1OctetString;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.ASN1TaggedObject;
import org.spongycastle.asn1.DERBitString;
import org.spongycastle.asn1.DEROctetString;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.DERTaggedObject;
import org.spongycastle.util.BigIntegers;
/**
* the elliptic curve private key object from SEC 1
* @deprecated use ECPrivateKey
*/
public class ECPrivateKeyStructure
extends ASN1Object
{
private ASN1Sequence seq;
public ECPrivateKeyStructure(
ASN1Sequence seq)
{
this.seq = seq;
}
public ECPrivateKeyStructure(
BigInteger key)
{
byte[] bytes = BigIntegers.asUnsignedByteArray(key);
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new ASN1Integer(1));
v.add(new DEROctetString(bytes));
seq = new DERSequence(v);
}
public ECPrivateKeyStructure(
BigInteger key,
ASN1Encodable parameters)
{
this(key, null, parameters);
}
public ECPrivateKeyStructure(
BigInteger key,
DERBitString publicKey,
ASN1Encodable parameters)
{
byte[] bytes = BigIntegers.asUnsignedByteArray(key);
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new ASN1Integer(1));
v.add(new DEROctetString(bytes));
if (parameters != null)
{
v.add(new DERTaggedObject(true, 0, parameters));
}
if (publicKey != null)
{
v.add(new DERTaggedObject(true, 1, publicKey));
}
seq = new DERSequence(v);
}
public BigInteger getKey()
{
ASN1OctetString octs = (ASN1OctetString)seq.getObjectAt(1);
return new BigInteger(1, octs.getOctets());
}
public DERBitString getPublicKey()
{
return (DERBitString)getObjectInTag(1);
}
public ASN1Primitive getParameters()
{
return getObjectInTag(0);
}
private ASN1Primitive getObjectInTag(int tagNo)
{
Enumeration e = seq.getObjects();
while (e.hasMoreElements())
{
ASN1Encodable obj = (ASN1Encodable)e.nextElement();
if (obj instanceof ASN1TaggedObject)
{
ASN1TaggedObject tag = (ASN1TaggedObject)obj;
if (tag.getTagNo() == tagNo)
{
return (ASN1Primitive)((ASN1Encodable)tag.getObject()).toASN1Primitive();
}
}
}
return null;
}
/**
* ECPrivateKey ::= SEQUENCE {
* version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
* privateKey OCTET STRING,
* parameters [0] Parameters OPTIONAL,
* publicKey [1] BIT STRING OPTIONAL }
*/
public ASN1Primitive toASN1Primitive()
{
return seq;
}
}
|