1package org.bouncycastle.asn1.x9;
2
3import org.bouncycastle.asn1.ASN1EncodableVector;
4import org.bouncycastle.asn1.ASN1Integer;
5import org.bouncycastle.asn1.ASN1Object;
6import org.bouncycastle.asn1.ASN1Primitive;
7import org.bouncycastle.asn1.ASN1Sequence;
8import org.bouncycastle.asn1.ASN1TaggedObject;
9import org.bouncycastle.asn1.DERBitString;
10import org.bouncycastle.asn1.DERSequence;
11
12public class DHValidationParms extends ASN1Object
13{
14    private DERBitString seed;
15    private ASN1Integer pgenCounter;
16
17    public static DHValidationParms getInstance(ASN1TaggedObject obj, boolean explicit)
18    {
19        return getInstance(ASN1Sequence.getInstance(obj, explicit));
20    }
21
22    public static DHValidationParms getInstance(Object obj)
23    {
24        if (obj instanceof DHValidationParms)
25        {
26            return (DHValidationParms)obj;
27        }
28        else if (obj != null)
29        {
30            return new DHValidationParms(ASN1Sequence.getInstance(obj));
31        }
32
33        return null;
34    }
35
36    public DHValidationParms(DERBitString seed, ASN1Integer pgenCounter)
37    {
38        if (seed == null)
39        {
40            throw new IllegalArgumentException("'seed' cannot be null");
41        }
42        if (pgenCounter == null)
43        {
44            throw new IllegalArgumentException("'pgenCounter' cannot be null");
45        }
46
47        this.seed = seed;
48        this.pgenCounter = pgenCounter;
49    }
50
51    private DHValidationParms(ASN1Sequence seq)
52    {
53        if (seq.size() != 2)
54        {
55            throw new IllegalArgumentException("Bad sequence size: " + seq.size());
56        }
57
58        this.seed = DERBitString.getInstance(seq.getObjectAt(0));
59        this.pgenCounter = ASN1Integer.getInstance(seq.getObjectAt(1));
60    }
61
62    public DERBitString getSeed()
63    {
64        return this.seed;
65    }
66
67    public ASN1Integer getPgenCounter()
68    {
69        return this.pgenCounter;
70    }
71
72    public ASN1Primitive toASN1Primitive()
73    {
74        ASN1EncodableVector v = new ASN1EncodableVector();
75        v.add(this.seed);
76        v.add(this.pgenCounter);
77        return new DERSequence(v);
78    }
79}
80