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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
using System;
using System.IO;
using Org.BouncyCastle.Asn1.Utilities;
namespace Org.BouncyCastle.Asn1
{
public class DerOutputStream
: FilterStream
{
public DerOutputStream(Stream os)
: base(os)
{
}
private void WriteLength(
int length)
{
if (length > 127)
{
int size = 1;
uint val = (uint) length;
while ((val >>= 8) != 0)
{
size++;
}
WriteByte((byte)(size | 0x80));
for (int i = (size - 1) * 8; i >= 0; i -= 8)
{
WriteByte((byte)(length >> i));
}
}
else
{
WriteByte((byte)length);
}
}
internal void WriteEncoded(
int tag,
byte[] bytes)
{
WriteByte((byte) tag);
WriteLength(bytes.Length);
Write(bytes, 0, bytes.Length);
}
internal void WriteEncoded(
int tag,
byte[] bytes,
int offset,
int length)
{
WriteByte((byte) tag);
WriteLength(length);
Write(bytes, offset, length);
}
internal void WriteTag(
int flags,
int tagNo)
{
if (tagNo < 31)
{
WriteByte((byte)(flags | tagNo));
}
else
{
WriteByte((byte)(flags | 0x1f));
if (tagNo < 128)
{
WriteByte((byte)tagNo);
}
else
{
byte[] stack = new byte[5];
int pos = stack.Length;
stack[--pos] = (byte)(tagNo & 0x7F);
do
{
tagNo >>= 7;
stack[--pos] = (byte)(tagNo & 0x7F | 0x80);
}
while (tagNo > 127);
Write(stack, pos, stack.Length - pos);
}
}
}
internal void WriteEncoded(
int flags,
int tagNo,
byte[] bytes)
{
WriteTag(flags, tagNo);
WriteLength(bytes.Length);
Write(bytes, 0, bytes.Length);
}
protected void WriteNull()
{
WriteByte(Asn1Tags.Null);
WriteByte(0x00);
}
[Obsolete("Use version taking an Asn1Encodable arg instead")]
public virtual void WriteObject(
object obj)
{
if (obj == null)
{
WriteNull();
}
else if (obj is Asn1Object)
{
((Asn1Object)obj).Encode(this);
}
else if (obj is Asn1Encodable)
{
((Asn1Encodable)obj).ToAsn1Object().Encode(this);
}
else
{
throw new IOException("object not Asn1Object");
}
}
public virtual void WriteObject(
Asn1Encodable obj)
{
if (obj == null)
{
WriteNull();
}
else
{
obj.ToAsn1Object().Encode(this);
}
}
public virtual void WriteObject(
Asn1Object obj)
{
if (obj == null)
{
WriteNull();
}
else
{
obj.Encode(this);
}
}
}
}
|
