core/src/main/java/org/spongycastle/asn1/x509/NameConstraints.java


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

package org.spongycastle.asn1.x509;

import java.util.Enumeration;

import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.ASN1TaggedObject;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.DERTaggedObject;

public class NameConstraints
    extends ASN1Object
{
    private GeneralSubtree[] permitted, excluded;

    public static NameConstraints getInstance(Object obj)
    {
        if (obj instanceof NameConstraints)
        {
            return (NameConstraints)obj;
        }
        if (obj != null)
        {
            return new NameConstraints(ASN1Sequence.getInstance(obj));
        }

        return null;
    }

    private NameConstraints(ASN1Sequence seq)
    {
        Enumeration e = seq.getObjects();
        while (e.hasMoreElements())
        {
            ASN1TaggedObject o = ASN1TaggedObject.getInstance(e.nextElement());
            switch (o.getTagNo())
            {
                case 0:
                    permitted = createArray(ASN1Sequence.getInstance(o, false));
                    break;
                case 1:
                    excluded = createArray(ASN1Sequence.getInstance(o, false));
                    break;
            }
        }
    }

    /**
     * Constructor from a given details.
     * 
     * <p>
     * permitted and excluded are arrays of GeneralSubtree objects.
     * 
     * @param permitted
     *            Permitted subtrees
     * @param excluded
     *            Excludes subtrees
     */
    public NameConstraints(
        GeneralSubtree[] permitted,
        GeneralSubtree[] excluded)
    {
        if (permitted != null)
        {
            this.permitted = permitted;
        }

        if (excluded != null)
        {
            this.excluded = excluded;
        }
    }

    private GeneralSubtree[] createArray(ASN1Sequence subtree)
    {
        GeneralSubtree[] ar = new GeneralSubtree[subtree.size()];

        for (int i = 0; i != ar.length; i++)
        {
            ar[i] = GeneralSubtree.getInstance(subtree.getObjectAt(i));
        }

        return ar;
    }

    public GeneralSubtree[] getPermittedSubtrees()
    {
        return permitted;
    }

    public GeneralSubtree[] getExcludedSubtrees()
    {
        return excluded;
    }

    /*
     * NameConstraints ::= SEQUENCE { permittedSubtrees [0] GeneralSubtrees
     * OPTIONAL, excludedSubtrees [1] GeneralSubtrees OPTIONAL }
     */
    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector();

        if (permitted != null)
        {
            v.add(new DERTaggedObject(false, 0, new DERSequence(permitted)));
        }

        if (excluded != null)
        {
            v.add(new DERTaggedObject(false, 1, new DERSequence(excluded)));
        }

        return new DERSequence(v);
    }
}