blob: 2206a3311d26d9281666f0d6bc20a441bed218ad (
plain)
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.bouncycastle.asn1.x9;
import java.util.Enumeration;
import java.util.Vector;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.nist.NISTNamedCurves;
import org.bouncycastle.asn1.sec.SECNamedCurves;
import org.bouncycastle.asn1.teletrust.TeleTrusTNamedCurves;
/**
* A general class that reads all X9.62 style EC curve tables.
*/
public class ECNamedCurveTable
{
/**
* return a X9ECParameters object representing the passed in named
* curve. The routine returns null if the curve is not present.
*
* @param name the name of the curve requested
* @return an X9ECParameters object or null if the curve is not available.
*/
public static X9ECParameters getByName(
String name)
{
X9ECParameters ecP = X962NamedCurves.getByName(name);
if (ecP == null)
{
ecP = SECNamedCurves.getByName(name);
}
if (ecP == null)
{
ecP = TeleTrusTNamedCurves.getByName(name);
}
if (ecP == null)
{
ecP = NISTNamedCurves.getByName(name);
}
return ecP;
}
/**
* return the object identifier signified by the passed in name. Null
* if there is no object identifier associated with name.
*
* @return the object identifier associated with name, if present.
*/
public static ASN1ObjectIdentifier getOID(
String name)
{
ASN1ObjectIdentifier oid = X962NamedCurves.getOID(name);
if (oid == null)
{
oid = SECNamedCurves.getOID(name);
}
if (oid == null)
{
oid = TeleTrusTNamedCurves.getOID(name);
}
if (oid == null)
{
oid = NISTNamedCurves.getOID(name);
}
return oid;
}
/**
* return a X9ECParameters object representing the passed in named
* curve.
*
* @param oid the object id of the curve requested
* @return an X9ECParameters object or null if the curve is not available.
*/
public static X9ECParameters getByOID(
ASN1ObjectIdentifier oid)
{
X9ECParameters ecP = X962NamedCurves.getByOID(oid);
if (ecP == null)
{
ecP = SECNamedCurves.getByOID(oid);
}
if (ecP == null)
{
ecP = TeleTrusTNamedCurves.getByOID(oid);
}
// NOTE: All the NIST curves are currently from SEC, so no point in redundant OID lookup
return ecP;
}
/**
* return an enumeration of the names of the available curves.
*
* @return an enumeration of the names of the available curves.
*/
public static Enumeration getNames()
{
Vector v = new Vector();
addEnumeration(v, X962NamedCurves.getNames());
addEnumeration(v, SECNamedCurves.getNames());
addEnumeration(v, NISTNamedCurves.getNames());
addEnumeration(v, TeleTrusTNamedCurves.getNames());
return v.elements();
}
private static void addEnumeration(
Vector v,
Enumeration e)
{
while (e.hasMoreElements())
{
v.addElement(e.nextElement());
}
}
}
|
