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
|
using System;
namespace Org.BouncyCastle.Asn1
{
/**
* BER TaggedObject - in ASN.1 notation this is any object preceded by
* a [n] where n is some number - these are assumed to follow the construction
* rules (as with sequences).
*/
public class BerTaggedObject
: DerTaggedObject
{
/**
* @param tagNo the tag number for this object.
* @param obj the tagged object.
*/
public BerTaggedObject(
int tagNo,
Asn1Encodable obj)
: base(tagNo, obj)
{
}
/**
* @param explicitly true if an explicitly tagged object.
* @param tagNo the tag number for this object.
* @param obj the tagged object.
*/
public BerTaggedObject(
bool explicitly,
int tagNo,
Asn1Encodable obj)
: base(explicitly, tagNo, obj)
{
}
/**
* create an implicitly tagged object that contains a zero
* length sequence.
*/
public BerTaggedObject(
int tagNo)
: base(false, tagNo, BerSequence.Empty)
{
}
internal override string Asn1Encoding
{
get { return Ber; }
}
internal override bool EncodeConstructed(int encoding)
{
if (Asn1OutputStream.EncodingBer != encoding)
return base.EncodeConstructed(encoding);
return IsExplicit() || GetBaseObject().ToAsn1Object().EncodeConstructed(encoding);
}
internal override int EncodedLength(int encoding, bool withID)
{
if (Asn1OutputStream.EncodingBer != encoding)
return base.EncodedLength(encoding, withID);
Asn1Object baseObject = GetBaseObject().ToAsn1Object();
bool withBaseID = IsExplicit();
int length = baseObject.EncodedLength(encoding, withBaseID);
if (withBaseID)
{
length += 3;
}
length += withID ? Asn1OutputStream.GetLengthOfIdentifier(TagNo) : 0;
return length;
}
internal override void Encode(Asn1OutputStream asn1Out, bool withID)
{
if (Asn1OutputStream.EncodingBer != asn1Out.Encoding)
{
base.Encode(asn1Out, withID);
return;
}
Asn1Object baseObject = GetBaseObject().ToAsn1Object();
bool withBaseID = IsExplicit();
if (withID)
{
int flags = TagClass;
if (withBaseID || baseObject.EncodeConstructed(asn1Out.Encoding))
{
flags |= Asn1Tags.Constructed;
}
asn1Out.WriteIdentifier(true, flags, TagNo);
}
if (withBaseID)
{
asn1Out.WriteByte(0x80);
baseObject.Encode(asn1Out, true);
asn1Out.WriteByte(0x00);
asn1Out.WriteByte(0x00);
}
else
{
baseObject.Encode(asn1Out, false);
}
}
internal override Asn1Sequence RebuildConstructed(Asn1Object asn1Object)
{
return new BerSequence(asn1Object);
}
}
}
|
