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1 package com.lowagie.bc.asn1;
2
3 import java.io.ByteArrayOutputStream;
4 import java.io.IOException;
5 import java.util.Enumeration;
6 import java.util.Vector;
7
8 public class BERConstructedOctetString
9 extends DEROctetString
10 {
11
14 static private byte[] toBytes(
15 Vector octs)
16 {
17 ByteArrayOutputStream bOut = new ByteArrayOutputStream();
18
19 for (int i = 0; i != octs.size(); i++)
20 {
21 DEROctetString o = (DEROctetString)octs.elementAt(i);
22
23 try
24 {
25 bOut.write(o.getOctets());
26 }
27 catch (IOException e)
28 {
29 throw new RuntimeException("exception converting octets " + e.toString());
30 }
31 }
32
33 return bOut.toByteArray();
34 }
35
36 private Vector octs;
37
38
41 public BERConstructedOctetString(
42 byte[] string)
43 {
44 super(string);
45 }
46
47 public BERConstructedOctetString(
48 Vector octs)
49 {
50 super(toBytes(octs));
51
52 this.octs = octs;
53 }
54
55 public BERConstructedOctetString(
56 DERObject obj)
57 {
58 super(obj);
59 }
60
61 public BERConstructedOctetString(
62 DEREncodable obj)
63 {
64 super(obj.getDERObject());
65 }
66
67 public byte[] getOctets()
68 {
69 return string;
70 }
71
72
75 public Enumeration getObjects()
76 {
77 if (octs == null)
78 {
79 return generateOcts().elements();
80 }
81
82 return octs.elements();
83 }
84
85 private Vector generateOcts()
86 {
87 int start = 0;
88 int end = 0;
89 Vector vec = new Vector();
90
91 while ((end + 1) < string.length)
92 {
93 if (string[end] == 0 && string[end + 1] == 0)
94 {
95 byte[] nStr = new byte[end - start + 1];
96
97 System.arraycopy(string, start, nStr, 0, nStr.length);
98
99 vec.addElement(new DEROctetString(nStr));
100 start = end + 1;
101 }
102 end++;
103 }
104
105 byte[] nStr = new byte[string.length - start];
106
107 System.arraycopy(string, start, nStr, 0, nStr.length);
108
109 vec.addElement(new DEROctetString(nStr));
110
111 return vec;
112 }
113
114 public void encode(
115 DEROutputStream out)
116 throws IOException
117 {
118 if (out instanceof ASN1OutputStream || out instanceof BEROutputStream)
119 {
120 out.write(CONSTRUCTED | OCTET_STRING);
121
122 out.write(0x80);
123
124 if (octs != null)
128 {
129 for (int i = 0; i != octs.size(); i++)
130 {
131 out.writeObject(octs.elementAt(i));
132 }
133 }
134 else
135 {
136 int start = 0;
137 int end = 0;
138
139 while ((end + 1) < string.length)
140 {
141 if (string[end] == 0 && string[end + 1] == 0)
142 {
143 byte[] nStr = new byte[end - start + 1];
144
145 System.arraycopy(string, start, nStr, 0, nStr.length);
146
147 out.writeObject(new DEROctetString(nStr));
148 start = end + 1;
149 }
150 end++;
151 }
152
153 byte[] nStr = new byte[string.length - start];
154
155 System.arraycopy(string, start, nStr, 0, nStr.length);
156
157 out.writeObject(new DEROctetString(nStr));
158 }
159
160 out.write(0x00);
161 out.write(0x00);
162 }
163 else
164 {
165 super.encode(out);
166 }
167 }
168 }
169 |
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