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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/* GENERATED SOURCE. DO NOT MODIFY. */
package com.android.internal.org.bouncycastle.util.encoders;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import com.android.internal.org.bouncycastle.util.Strings;
/**
* Utility class for converting hex data to bytes and back again.
* @hide This class is not part of the Android public SDK API
*/
public class Hex
{
private static final HexEncoder encoder = new HexEncoder();
public static String toHexString(
byte[] data)
{
return toHexString(data, 0, data.length);
}
public static String toHexString(
byte[] data,
int off,
int length)
{
byte[] encoded = encode(data, off, length);
return Strings.fromByteArray(encoded);
}
/**
* encode the input data producing a Hex encoded byte array.
*
* @return a byte array containing the Hex encoded data.
*/
public static byte[] encode(
byte[] data)
{
return encode(data, 0, data.length);
}
/**
* encode the input data producing a Hex encoded byte array.
*
* @return a byte array containing the Hex encoded data.
*/
public static byte[] encode(
byte[] data,
int off,
int length)
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
try
{
encoder.encode(data, off, length, bOut);
}
catch (Exception e)
{
throw new EncoderException("exception encoding Hex string: " + e.getMessage(), e);
}
return bOut.toByteArray();
}
/**
* Hex encode the byte data writing it to the given output stream.
*
* @return the number of bytes produced.
*/
public static int encode(
byte[] data,
OutputStream out)
throws IOException
{
return encoder.encode(data, 0, data.length, out);
}
/**
* Hex encode the byte data writing it to the given output stream.
*
* @return the number of bytes produced.
*/
public static int encode(
byte[] data,
int off,
int length,
OutputStream out)
throws IOException
{
return encoder.encode(data, off, length, out);
}
/**
* decode the Hex encoded input data. It is assumed the input data is valid.
*
* @return a byte array representing the decoded data.
*/
public static byte[] decode(
byte[] data)
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
try
{
encoder.decode(data, 0, data.length, bOut);
}
catch (Exception e)
{
throw new DecoderException("exception decoding Hex data: " + e.getMessage(), e);
}
return bOut.toByteArray();
}
/**
* decode the Hex encoded String data - whitespace will be ignored.
*
* @return a byte array representing the decoded data.
*/
public static byte[] decode(
String data)
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
try
{
encoder.decode(data, bOut);
}
catch (Exception e)
{
throw new DecoderException("exception decoding Hex string: " + e.getMessage(), e);
}
return bOut.toByteArray();
}
/**
* decode the Hex encoded String data writing it to the given output stream,
* whitespace characters will be ignored.
*
* @return the number of bytes produced.
*/
public static int decode(
String data,
OutputStream out)
throws IOException
{
return encoder.decode(data, out);
}
/**
* Decode the hexadecimal-encoded string strictly i.e. any non-hexadecimal characters will be
* considered an error.
*
* @return a byte array representing the decoded data.
*/
public static byte[] decodeStrict(String str)
{
try
{
return encoder.decodeStrict(str, 0, str.length());
}
catch (Exception e)
{
throw new DecoderException("exception decoding Hex string: " + e.getMessage(), e);
}
}
/**
* Decode the hexadecimal-encoded string strictly i.e. any non-hexadecimal characters will be
* considered an error.
*
* @return a byte array representing the decoded data.
*/
public static byte[] decodeStrict(String str, int off, int len)
{
try
{
return encoder.decodeStrict(str, off, len);
}
catch (Exception e)
{
throw new DecoderException("exception decoding Hex string: " + e.getMessage(), e);
}
}
}
|