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
|
package com.lowagie.bc.asn1;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* DER TaggedObject - in ASN.1 nottation this is any object proceeded by
* a [n] where n is some number - these are assume to follow the construction
* rules (as with sequences).
*/
public class DERTaggedObject
extends ASN1TaggedObject
{
/**
* @param tagNo the tag number for this object.
* @param obj the tagged object.
*/
public DERTaggedObject(
int tagNo,
DEREncodable obj)
{
super(tagNo, obj);
}
/**
* @param explicit true if an explicitly tagged object.
* @param tagNo the tag number for this object.
* @param obj the tagged object.
*/
public DERTaggedObject(
boolean explicit,
int tagNo,
DEREncodable obj)
{
super(explicit, tagNo, obj);
}
/**
* create an implicitly tagged object that contains a zero
* length sequence.
*/
public DERTaggedObject(
int tagNo)
{
super(false, tagNo, new DERSequence());
}
void encode(
DEROutputStream out)
throws IOException
{
if (!empty)
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
dOut.writeObject(obj);
dOut.close();
byte[] bytes = bOut.toByteArray();
if (explicit)
{
out.writeEncoded(CONSTRUCTED | TAGGED | tagNo, bytes);
}
else
{
//
// need to mark constructed types...
//
if ((bytes[0] & CONSTRUCTED) != 0)
{
bytes[0] = (byte)(CONSTRUCTED | TAGGED | tagNo);
}
else
{
bytes[0] = (byte)(TAGGED | tagNo);
}
out.write(bytes);
}
}
else
{
out.writeEncoded(CONSTRUCTED | TAGGED | tagNo, new byte[0]);
}
}
}
|
