summary refs log tree commit diff
path: root/crypto/src/asn1/cms/EncryptedData.cs
blob: 5b83782820e8477a89bb46c201124a7c8effdb9d (plain) (blame)
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
using System;

namespace Org.BouncyCastle.Asn1.Cms
{
	public class EncryptedData
		: Asn1Encodable
	{
		private readonly DerInteger				version;
		private readonly EncryptedContentInfo	encryptedContentInfo;
		private readonly Asn1Set				unprotectedAttrs;

		public static EncryptedData GetInstance(
			object obj)
		{
			if (obj is EncryptedData)
				return (EncryptedData) obj;

			if (obj is Asn1Sequence)
				return new EncryptedData((Asn1Sequence) obj);

			throw new ArgumentException("Invalid EncryptedData: " + obj.GetType().Name);
		}

		public EncryptedData(
			EncryptedContentInfo encInfo)
			: this(encInfo, null)
		{
		}

		public EncryptedData(
			EncryptedContentInfo	encInfo,
			Asn1Set					unprotectedAttrs)
		{
			if (encInfo == null)
				throw new ArgumentNullException("encInfo");

			this.version = new DerInteger((unprotectedAttrs == null) ? 0 : 2);
			this.encryptedContentInfo = encInfo;
			this.unprotectedAttrs = unprotectedAttrs;
		}

		private EncryptedData(
			Asn1Sequence seq)
		{
			if (seq == null)
				throw new ArgumentNullException("seq");
			if (seq.Count < 2 || seq.Count > 3)
				throw new ArgumentException("Bad sequence size: " + seq.Count, "seq");

			this.version = DerInteger.GetInstance(seq[0]);
			this.encryptedContentInfo = EncryptedContentInfo.GetInstance(seq[1]);

			if (seq.Count > 2)
			{
				this.unprotectedAttrs = Asn1Set.GetInstance(seq[2]);
			}
		}

		public virtual DerInteger Version
		{
			get { return version; }
		}

		public virtual EncryptedContentInfo EncryptedContentInfo
		{
			get { return encryptedContentInfo; }
		}

		public virtual Asn1Set UnprotectedAttrs
		{
			get { return unprotectedAttrs; }
		}

		/**
		* <pre>
		*       EncryptedData ::= SEQUENCE {
		*                     version CMSVersion,
		*                     encryptedContentInfo EncryptedContentInfo,
		*                     unprotectedAttrs [1] IMPLICIT UnprotectedAttributes OPTIONAL }
		* </pre>
		* @return a basic ASN.1 object representation.
		*/
		public override Asn1Object ToAsn1Object()
		{
			Asn1EncodableVector v = new Asn1EncodableVector(version, encryptedContentInfo);

			if (unprotectedAttrs != null)
			{
				v.Add(new BerTaggedObject(false, 1, unprotectedAttrs));
			}

			return new BerSequence(v);
		}
	}
}