DERInteger.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.math.BigInteger;
- public class DERInteger
- extends DERObject
- {
- byte[] bytes;
- /**
- * return an integer from the passed in object
- *
- * @exception IllegalArgumentException if the object cannot be converted.
- */
- public static DERInteger getInstance(
- Object obj)
- {
- if (obj == null || obj instanceof DERInteger)
- {
- return (DERInteger)obj;
- }
- if (obj instanceof ASN1OctetString)
- {
- return new DERInteger(((ASN1OctetString)obj).getOctets());
- }
- if (obj instanceof ASN1TaggedObject)
- {
- return getInstance(((ASN1TaggedObject)obj).getObject());
- }
- throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
- }
- /**
- * return an Integer 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 DERInteger getInstance(
- ASN1TaggedObject obj,
- boolean explicit)
- {
- return getInstance(obj.getObject());
- }
- public DERInteger(
- int value)
- {
- bytes = BigInteger.valueOf(value).toByteArray();
- }
- public DERInteger(
- BigInteger value)
- {
- bytes = value.toByteArray();
- }
- public DERInteger(
- byte[] bytes)
- {
- this.bytes = bytes;
- }
- public BigInteger getValue()
- {
- return new BigInteger(bytes);
- }
- /**
- * in some cases positive values get crammed into a space,
- * that's not quite big enough...
- */
- public BigInteger getPositiveValue()
- {
- return new BigInteger(1, bytes);
- }
- void encode(
- DEROutputStream out)
- throws IOException
- {
- out.writeEncoded(INTEGER, bytes);
- }
- public boolean equals(
- Object o)
- {
- if (o == null || !(o instanceof DERInteger))
- {
- return false;
- }
- DERInteger other = (DERInteger)o;
- if (bytes.length != other.bytes.length)
- {
- return false;
- }
- for (int i = 0; i != bytes.length; i++)
- {
- if (bytes[i] != other.bytes[i])
- {
- return false;
- }
- }
- return true;
- }
- }