org.bouncycastle.x509.X509V2AttributeCertificate Maven / Gradle / Ivy
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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.6.
package org.bouncycastle.x509;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.x509.AttributeCertificate;
import org.bouncycastle.asn1.x509.X509Extension;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.util.Arrays;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateExpiredException;
import java.security.cert.CertificateNotYetValidException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* An implementation of a version 2 X.509 Attribute Certificate.
*/
public class X509V2AttributeCertificate
implements X509AttributeCertificate
{
private AttributeCertificate cert;
private Date notBefore;
private Date notAfter;
public X509V2AttributeCertificate(
InputStream encIn)
throws IOException
{
this(AttributeCertificate.getInstance(new ASN1InputStream(encIn).readObject()));
}
public X509V2AttributeCertificate(
byte[] encoded)
throws IOException
{
this(new ByteArrayInputStream(encoded));
}
X509V2AttributeCertificate(
AttributeCertificate cert)
throws IOException
{
this.cert = cert;
try
{
this.notAfter = cert.getAcinfo().getAttrCertValidityPeriod().getNotAfterTime().getDate();
this.notBefore = cert.getAcinfo().getAttrCertValidityPeriod().getNotBeforeTime().getDate();
}
catch (ParseException e)
{
throw new IOException("invalid data structure in certificate!");
}
}
public int getVersion()
{
return cert.getAcinfo().getVersion().getValue().intValue() + 1;
}
public BigInteger getSerialNumber()
{
return cert.getAcinfo().getSerialNumber().getValue();
}
public AttributeCertificateHolder getHolder()
{
return new AttributeCertificateHolder((ASN1Sequence)cert.getAcinfo().getHolder().toASN1Object());
}
public AttributeCertificateIssuer getIssuer()
{
return new AttributeCertificateIssuer(cert.getAcinfo().getIssuer());
}
public Date getNotBefore()
{
return notBefore;
}
public Date getNotAfter()
{
return notAfter;
}
public boolean[] getIssuerUniqueID()
{
DERBitString id = cert.getAcinfo().getIssuerUniqueID();
if (id != null)
{
byte[] bytes = id.getBytes();
boolean[] boolId = new boolean[bytes.length * 8 - id.getPadBits()];
for (int i = 0; i != boolId.length; i++)
{
boolId[i] = (bytes[i / 8] & (0x80 >>> (i % 8))) != 0;
}
return boolId;
}
return null;
}
public void checkValidity()
throws CertificateExpiredException, CertificateNotYetValidException
{
this.checkValidity(new Date());
}
public void checkValidity(
Date date)
throws CertificateExpiredException, CertificateNotYetValidException
{
if (date.after(this.getNotAfter()))
{
throw new CertificateExpiredException("certificate expired on " + this.getNotAfter());
}
if (date.before(this.getNotBefore()))
{
throw new CertificateNotYetValidException("certificate not valid till " + this.getNotBefore());
}
}
public byte[] getSignature()
{
return cert.getSignatureValue().getBytes();
}
public final void verify(
PublicKey key,
String provider)
throws CertificateException, NoSuchAlgorithmException,
InvalidKeyException, NoSuchProviderException, SignatureException
{
Signature signature = null;
if (!cert.getSignatureAlgorithm().equals(cert.getAcinfo().getSignature()))
{
throw new CertificateException("Signature algorithm in certificate info not same as outer certificate");
}
signature = Signature.getInstance(cert.getSignatureAlgorithm().getObjectId().getId(), provider);
signature.initVerify(key);
try
{
signature.update(cert.getAcinfo().getEncoded());
}
catch (IOException e)
{
throw new SignatureException("Exception encoding certificate info object");
}
if (!signature.verify(this.getSignature()))
{
throw new InvalidKeyException("Public key presented not for certificate signature");
}
}
public byte[] getEncoded()
throws IOException
{
return cert.getEncoded();
}
public byte[] getExtensionValue(String oid)
{
X509Extensions extensions = cert.getAcinfo().getExtensions();
if (extensions != null)
{
X509Extension ext = extensions.getExtension(new DERObjectIdentifier(oid));
if (ext != null)
{
try
{
return ext.getValue().getEncoded(ASN1Encodable.DER);
}
catch (Exception e)
{
throw new RuntimeException("error encoding " + e.toString());
}
}
}
return null;
}
private Set getExtensionOIDs(
boolean critical)
{
X509Extensions extensions = cert.getAcinfo().getExtensions();
if (extensions != null)
{
Set set = new HashSet();
Enumeration e = extensions.oids();
while (e.hasMoreElements())
{
DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement();
X509Extension ext = extensions.getExtension(oid);
if (ext.isCritical() == critical)
{
set.add(oid.getId());
}
}
return set;
}
return null;
}
public Set getNonCriticalExtensionOIDs()
{
return getExtensionOIDs(false);
}
public Set getCriticalExtensionOIDs()
{
return getExtensionOIDs(true);
}
public boolean hasUnsupportedCriticalExtension()
{
Set extensions = getCriticalExtensionOIDs();
return extensions != null && !extensions.isEmpty();
}
public X509Attribute[] getAttributes()
{
ASN1Sequence seq = cert.getAcinfo().getAttributes();
X509Attribute[] attrs = new X509Attribute[seq.size()];
for (int i = 0; i != seq.size(); i++)
{
attrs[i] = new X509Attribute((ASN1Encodable)seq.getObjectAt(i));
}
return attrs;
}
public X509Attribute[] getAttributes(String oid)
{
ASN1Sequence seq = cert.getAcinfo().getAttributes();
List list = new ArrayList();
for (int i = 0; i != seq.size(); i++)
{
X509Attribute attr = new X509Attribute((ASN1Encodable)seq.getObjectAt(i));
if (attr.getOID().equals(oid))
{
list.add(attr);
}
}
if (list.size() == 0)
{
return null;
}
return (X509Attribute[])list.toArray(new X509Attribute[list.size()]);
}
public boolean equals(
Object o)
{
if (o == this)
{
return true;
}
if (!(o instanceof X509AttributeCertificate))
{
return false;
}
X509AttributeCertificate other = (X509AttributeCertificate)o;
try
{
byte[] b1 = this.getEncoded();
byte[] b2 = other.getEncoded();
return Arrays.areEqual(b1, b2);
}
catch (IOException e)
{
return false;
}
}
public int hashCode()
{
try
{
return Arrays.hashCode(this.getEncoded());
}
catch (IOException e)
{
return 0;
}
}
}