blob: ad48a8332a88eec4474bc821864d6d8d8e13dccc (
plain)
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
|
package org.bouncycastle.asn1;
import java.io.IOException;
import java.util.Enumeration;
public class DERSequence
extends ASN1Sequence
{
private int bodyLength = -1;
/**
* create an empty sequence
*/
public DERSequence()
{
}
/**
* create a sequence containing one object
*/
public DERSequence(
ASN1Encodable obj)
{
super(obj);
}
/**
* create a sequence containing a vector of objects.
*/
public DERSequence(
ASN1EncodableVector v)
{
super(v);
}
/**
* create a sequence containing an array of objects.
*/
public DERSequence(
ASN1Encodable[] array)
{
super(array);
}
private int getBodyLength()
throws IOException
{
if (bodyLength < 0)
{
int length = 0;
for (Enumeration e = this.getObjects(); e.hasMoreElements();)
{
Object obj = e.nextElement();
length += ((ASN1Encodable)obj).toASN1Primitive().toDERObject().encodedLength();
}
bodyLength = length;
}
return bodyLength;
}
int encodedLength()
throws IOException
{
int length = getBodyLength();
return 1 + StreamUtil.calculateBodyLength(length) + length;
}
/*
* A note on the implementation:
* <p>
* As DER requires the constructed, definite-length model to
* be used for structured types, this varies slightly from the
* ASN.1 descriptions given. Rather than just outputting SEQUENCE,
* we also have to specify CONSTRUCTED, and the objects length.
*/
void encode(
ASN1OutputStream out)
throws IOException
{
ASN1OutputStream dOut = out.getDERSubStream();
int length = getBodyLength();
out.write(BERTags.SEQUENCE | BERTags.CONSTRUCTED);
out.writeLength(length);
for (Enumeration e = this.getObjects(); e.hasMoreElements();)
{
Object obj = e.nextElement();
dOut.writeObject((ASN1Encodable)obj);
}
}
}
|