blob: 2b1ed0d195f438f19d4211fc8fcf7929b5c2d4c3 (
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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
package org.bouncycastle.bcpg;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import org.bouncycastle.bcpg.attr.ImageAttribute;
/**
* reader for user attribute sub-packets
*/
public class UserAttributeSubpacketInputStream
extends InputStream implements UserAttributeSubpacketTags
{
InputStream in;
public UserAttributeSubpacketInputStream(
InputStream in)
{
this.in = in;
}
public int available()
throws IOException
{
return in.available();
}
public int read()
throws IOException
{
return in.read();
}
private void readFully(
byte[] buf,
int off,
int len)
throws IOException
{
if (len > 0)
{
int b = this.read();
if (b < 0)
{
throw new EOFException();
}
buf[off] = (byte)b;
off++;
len--;
}
while (len > 0)
{
int l = in.read(buf, off, len);
if (l < 0)
{
throw new EOFException();
}
off += l;
len -= l;
}
}
public UserAttributeSubpacket readPacket()
throws IOException
{
int l = this.read();
int bodyLen = 0;
boolean longLength = false;
if (l < 0)
{
return null;
}
if (l < 192)
{
bodyLen = l;
}
else if (l <= 223)
{
bodyLen = ((l - 192) << 8) + (in.read()) + 192;
}
else if (l == 255)
{
bodyLen = (in.read() << 24) | (in.read() << 16) | (in.read() << 8) | in.read();
longLength = true;
}
else
{
throw new IOException("unrecognised length reading user attribute sub packet");
}
int tag = in.read();
if (tag < 0)
{
throw new EOFException("unexpected EOF reading user attribute sub packet");
}
byte[] data = new byte[bodyLen - 1];
this.readFully(data, 0, data.length);
int type = tag;
switch (type)
{
case IMAGE_ATTRIBUTE:
return new ImageAttribute(longLength, data);
}
return new UserAttributeSubpacket(type, longLength, data);
}
}
|
