RSAPublicKeyStructure.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.x509;
- import java.util.Enumeration;
- import java.math.BigInteger;
- import org.bouncycastle.asn1.*;
- public class RSAPublicKeyStructure
- implements DEREncodable
- {
- private BigInteger modulus;
- private BigInteger publicExponent;
- public static RSAPublicKeyStructure getInstance(
- ASN1TaggedObject obj,
- boolean explicit)
- {
- return getInstance(ASN1Sequence.getInstance(obj, explicit));
- }
- public static RSAPublicKeyStructure getInstance(
- Object obj)
- {
- if(obj == null || obj instanceof RSAPublicKeyStructure)
- {
- return (RSAPublicKeyStructure)obj;
- }
- if(obj instanceof ASN1Sequence)
- {
- return new RSAPublicKeyStructure((ASN1Sequence)obj);
- }
- throw new IllegalArgumentException("Invalid RSAPublicKeyStructure: " + obj.getClass().getName());
- }
- public RSAPublicKeyStructure(
- BigInteger modulus,
- BigInteger publicExponent)
- {
- this.modulus = modulus;
- this.publicExponent = publicExponent;
- }
- public RSAPublicKeyStructure(
- ASN1Sequence seq)
- {
- Enumeration e = seq.getObjects();
- modulus = ((DERInteger)e.nextElement()).getPositiveValue();
- publicExponent = ((DERInteger)e.nextElement()).getPositiveValue();
- }
- public BigInteger getModulus()
- {
- return modulus;
- }
- public BigInteger getPublicExponent()
- {
- return publicExponent;
- }
- /**
- * This outputs the key in PKCS1v2 format.
- * <pre>
- * RSAPublicKey ::= SEQUENCE {
- * modulus INTEGER, -- n
- * publicExponent INTEGER, -- e
- * }
- * </pre>
- * <p>
- */
- public DERObject getDERObject()
- {
- ASN1EncodableVector v = new ASN1EncodableVector();
- v.add(new DERInteger(getModulus()));
- v.add(new DERInteger(getPublicExponent()));
- return new DERSequence(v);
- }
- }