BERConstructedOctetString.java
资源名称:security.rar [点击查看]
上传用户:lior1029
上传日期:2013-05-07
资源大小:209k
文件大小:3k
源码类别:
CA认证
开发平台:
Java
- package org.bouncycastle.asn1;
- import java.io.*;
- import java.util.*;
- public class BERConstructedOctetString
- extends DEROctetString
- {
- /**
- * convert a vector of octet strings into a single byte string
- */
- static private byte[] toBytes(
- Vector octs)
- {
- ByteArrayOutputStream bOut = new ByteArrayOutputStream();
- for (int i = 0; i != octs.size(); i++)
- {
- DEROctetString o = (DEROctetString)octs.elementAt(i);
- try
- {
- bOut.write(o.getOctets());
- }
- catch (IOException e)
- {
- throw new RuntimeException("exception converting octets " + e.toString());
- }
- }
- return bOut.toByteArray();
- }
- private Vector octs;
- /**
- * @param string the octets making up the octet string.
- */
- public BERConstructedOctetString(
- byte[] string)
- {
- super(string);
- }
- public BERConstructedOctetString(
- Vector octs)
- {
- super(toBytes(octs));
- this.octs = octs;
- }
- public BERConstructedOctetString(
- DERObject obj)
- {
- super(obj);
- }
- public BERConstructedOctetString(
- DEREncodable obj)
- {
- super(obj.getDERObject());
- }
- public byte[] getOctets()
- {
- return string;
- }
- /**
- * return the DER octets that make up this string.
- */
- public Enumeration getObjects()
- {
- if (octs == null)
- {
- octs = generateOcts();
- }
- return octs.elements();
- }
- private Vector generateOcts()
- {
- int start = 0;
- int end = 0;
- Vector vec = new Vector();
- while ((end + 1) < string.length)
- {
- if (string[end] == 0 && string[end + 1] == 0)
- {
- byte[] nStr = new byte[end - start + 1];
- for (int i = 0; i != nStr.length; i++)
- {
- nStr[i] = string[start + i];
- }
- vec.addElement(new DEROctetString(nStr));
- start = end + 1;
- }
- end++;
- }
- byte[] nStr = new byte[string.length - start];
- for (int i = 0; i != nStr.length; i++)
- {
- nStr[i] = string[start + i];
- }
- vec.addElement(new DEROctetString(nStr));
- return vec;
- }
- public void encode(
- DEROutputStream out)
- throws IOException
- {
- if (out instanceof ASN1OutputStream || out instanceof BEROutputStream)
- {
- out.write(CONSTRUCTED | OCTET_STRING);
- out.write(0x80);
- if (octs == null)
- {
- octs = generateOcts();
- }
- for (int i = 0; i != octs.size(); i++)
- {
- out.writeObject(octs.elementAt(i));
- }
- out.write(0x00);
- out.write(0x00);
- }
- else
- {
- super.encode(out);
- }
- }
- }