Signature.cs @ 20

Revision 20, 2.8 kB (checked in by root, 5 years ago)

Line
1	using System;
2
3	using Org.BouncyCastle.Asn1;
4	using Org.BouncyCastle.Asn1.X509;
5
6	namespace Org.BouncyCastle.Asn1.Ocsp
7	{
8	public class Signature
9	: Asn1Encodable
10	{
11	internal AlgorithmIdentifier signatureAlgorithm;
12	internal DerBitString signatureValue;
13	internal Asn1Sequence certs;
14
15	public static Signature GetInstance(
16	Asn1TaggedObject obj,
17	bool explicitly)
18	{
19	return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
20	}
21
22	public static Signature GetInstance(
23	object obj)
24	{
25	if (obj == null \|\| obj is Signature)
26	{
27	return (Signature)obj;
28	}
29
30	if (obj is Asn1Sequence)
31	{
32	return new Signature((Asn1Sequence)obj);
33	}
34
35	throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
36	}
37
38	public Signature(
39	AlgorithmIdentifier signatureAlgorithm,
40	DerBitString signatureValue)
41	: this(signatureAlgorithm, signatureValue, null)
42	{
43	}
44
45	public Signature(
46	AlgorithmIdentifier signatureAlgorithm,
47	DerBitString signatureValue,
48	Asn1Sequence certs)
49	{
50	if (signatureAlgorithm == null)
51	throw new ArgumentException("signatureAlgorithm");
52	if (signatureValue == null)
53	throw new ArgumentException("signatureValue");
54
55	this.signatureAlgorithm = signatureAlgorithm;
56	this.signatureValue = signatureValue;
57	this.certs = certs;
58	}
59
60	private Signature(
61	Asn1Sequence seq)
62	{
63	signatureAlgorithm = AlgorithmIdentifier.GetInstance(seq[0]);
64	signatureValue = (DerBitString)seq[1];
65
66	if (seq.Count == 3)
67	{
68	certs = Asn1Sequence.GetInstance(
69	(Asn1TaggedObject)seq[2], true);
70	}
71	}
72
73	public AlgorithmIdentifier SignatureAlgorithm
74	{
75	get { return signatureAlgorithm; }
76	}
77
78	public DerBitString SignatureValue
79	{
80	get { return signatureValue; }
81	}
82
83	public Asn1Sequence Certs
84	{
85	get { return certs; }
86	}
87
88	/**
89	* Produce an object suitable for an Asn1OutputStream.
90	* <pre>
91	* Signature ::= Sequence {
92	* signatureAlgorithm AlgorithmIdentifier,
93	* signature BIT STRING,
94	* certs [0] EXPLICIT Sequence OF Certificate OPTIONAL}
95	* </pre>
96	*/
97	public override Asn1Object ToAsn1Object()
98	{
99	Asn1EncodableVector v = new Asn1EncodableVector(
100	signatureAlgorithm, signatureValue);
101
102	if (certs != null)
103	{
104	v.Add(new DerTaggedObject(true, 0, certs));
105	}
106
107	return new DerSequence(v);
108	}
109	}
110	}

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