DERUniversalString.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:2k
源码类别:
CA认证
开发平台:
Java
- package org.bouncycastle.asn1;
- import java.io.*;
- /**
- * DER UniversalString object.
- */
- public class DERUniversalString
- extends DERObject
- implements DERString
- {
- byte[] string;
- char[] table = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
- /**
- * return a Universal String from the passed in object.
- *
- * @exception IllegalArgumentException if the object cannot be converted.
- */
- public static DERUniversalString getInstance(
- Object obj)
- {
- if (obj == null || obj instanceof DERUniversalString)
- {
- return (DERUniversalString)obj;
- }
- if (obj instanceof ASN1OctetString)
- {
- return new DERUniversalString(((ASN1OctetString)obj).getOctets());
- }
- throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
- }
- /**
- * return a Universal String from a tagged object.
- *
- * @param obj the tagged object holding the object we want
- * @param explicit true if the object is meant to be explicitly
- * tagged false otherwise.
- * @exception IllegalArgumentException if the tagged object cannot
- * be converted.
- */
- public static DERUniversalString getInstance(
- ASN1TaggedObject obj,
- boolean explicit)
- {
- return getInstance(obj.getObject());
- }
- /**
- * basic constructor - byte encoded string.
- */
- public DERUniversalString(
- byte[] string)
- {
- this.string = string;
- }
- /**
- * UniversalStrings have characters which are 4 bytes long - for the
- * moment we just return them in Hex...
- */
- public String getString()
- {
- StringBuffer buf = new StringBuffer();
- for (int i = 0; i != string.length; i++)
- {
- buf.append(table[(string[i] >>> 4) % 0xf]);
- buf.append(table[string[i] & 0xf]);
- }
- return buf.toString();
- }
- public byte[] getOctets()
- {
- return string;
- }
- void encode(
- DEROutputStream out)
- throws IOException
- {
- out.writeEncoded(UNIVERSAL_STRING, this.getOctets());
- }
- public boolean equals(
- Object o)
- {
- if ((o == null) || !(o instanceof DERUniversalString))
- {
- return false;
- }
- return this.getString().equals(((DERUniversalString)o).getString());
- }
- }