package org.bouncycastle.cert;
import java.io.IOException;
import java.io.OutputStream;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Set;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.AttCertValidityPeriod;
import org.bouncycastle.asn1.x509.Attribute;
import org.bouncycastle.asn1.x509.AttributeCertificate;
import org.bouncycastle.asn1.x509.AttributeCertificateInfo;
import org.bouncycastle.asn1.x509.X509Extension;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.operator.ContentVerifier;
import org.bouncycastle.operator.ContentVerifierProvider;
/**
* Holding class for an X.509 AttributeCertificate structure.
*/
public class X509AttributeCertificateHolder
{
private static Attribute[] EMPTY_ARRAY = new Attribute[0];
private AttributeCertificate attrCert;
private X509Extensions extensions;
private static AttributeCertificate parseBytes(byte[] certEncoding)
throws IOException
{
try
{
return AttributeCertificate.getInstance(ASN1Object.fromByteArray(certEncoding));
}
catch (ClassCastException e)
{
throw new CertIOException("malformed data: " + e.getMessage(), e);
}
catch (IllegalArgumentException e)
{
throw new CertIOException("malformed data: " + e.getMessage(), e);
}
}
/**
* Create a X509AttributeCertificateHolder from the passed in bytes.
*
* @param certEncoding BER/DER encoding of the certificate.
* @throws IOException in the event of corrupted data, or an incorrect structure.
*/
public X509AttributeCertificateHolder(byte[] certEncoding)
throws IOException
{
this(parseBytes(certEncoding));
}
/**
* Create a X509AttributeCertificateHolder from the passed in ASN.1 structure.
*
* @param attrCert an ASN.1 AttributeCertificate structure.
*/
public X509AttributeCertificateHolder(AttributeCertificate attrCert)
{
this.attrCert = attrCert;
this.extensions = attrCert.getAcinfo().getExtensions();
}
/**
* Return the ASN.1 encoding of this holder's attribute certificate.
*
* @return a DER encoded byte array.
* @throws IOException if an encoding cannot be generated.
*/
public byte[] getEncoded()
throws IOException
{
return attrCert.getEncoded();
}
public int getVersion()
{
return attrCert.getAcinfo().getVersion().getValue().intValue() + 1;
}
/**
* Return the serial number of this attribute certificate.
*
* @return the serial number.
*/
public BigInteger getSerialNumber()
{
return attrCert.getAcinfo().getSerialNumber().getValue();
}
/**
* Return the holder details for this attribute certificate.
*
* @return this attribute certificate's holder structure.
*/
public AttributeCertificateHolder getHolder()
{
return new AttributeCertificateHolder((ASN1Sequence)attrCert.getAcinfo().getHolder().toASN1Object());
}
/**
* Return the issuer details for this attribute certificate.
*
* @return this attribute certificate's issuer structure,
*/
public AttributeCertificateIssuer getIssuer()
{
return new AttributeCertificateIssuer(attrCert.getAcinfo().getIssuer());
}
/**
* Return the date before which this attribute certificate is not valid.
*
* @return the start date for the attribute certificate's validity period.
*/
public Date getNotBefore()
{
return CertUtils.recoverDate(attrCert.getAcinfo().getAttrCertValidityPeriod().getNotBeforeTime());
}
/**
* Return the date after which this attribute certificate is not valid.
*
* @return the final date for the attribute certificate's validity period.
*/
public Date getNotAfter()
{
return CertUtils.recoverDate(attrCert.getAcinfo().getAttrCertValidityPeriod().getNotAfterTime());
}
/**
* Return the attributes, if any associated with this request.
*
* @return an array of Attribute, zero length if none present.
*/
public Attribute[] getAttributes()
{
ASN1Sequence seq = attrCert.getAcinfo().getAttributes();
Attribute[] attrs = new Attribute[seq.size()];
for (int i = 0; i != seq.size(); i++)
{
attrs[i] = Attribute.getInstance(seq.getObjectAt(i));
}
return attrs;
}
/**
* Return an array of attributes matching the passed in type OID.
*
* @param type the type of the attribute being looked for.
* @return an array of Attribute of the requested type, zero length if none present.
*/
public Attribute[] getAttributes(ASN1ObjectIdentifier type)
{
ASN1Sequence seq = attrCert.getAcinfo().getAttributes();
List list = new ArrayList();
for (int i = 0; i != seq.size(); i++)
{
Attribute attr = Attribute.getInstance(seq.getObjectAt(i));
if (attr.getAttrType().equals(type))
{
list.add(attr);
}
}
if (list.size() == 0)
{
return EMPTY_ARRAY;
}
return (Attribute[])list.toArray(new Attribute[list.size()]);
}
/**
* Return whether or not the holder's attribute certificate contains extensions.
*
* @return true if extension are present, false otherwise.
*/
public boolean hasExtensions()
{
return extensions != null;
}
/**
* Look up the extension associated with the passed in OID.
*
* @param oid the OID of the extension of interest.
*
* @return the extension if present, null otherwise.
*/
public X509Extension getExtension(ASN1ObjectIdentifier oid)
{
if (extensions != null)
{
return extensions.getExtension(oid);
}
return null;
}
/**
* Returns a list of ASN1ObjectIdentifier objects representing the OIDs of the
* extensions contained in this holder's attribute certificate.
*
* @return a list of extension OIDs.
*/
public List getExtensionOIDs()
{
return CertUtils.getExtensionOIDs(extensions);
}
/**
* Returns a set of ASN1ObjectIdentifier objects representing the OIDs of the
* critical extensions contained in this holder's attribute certificate.
*
* @return a set of critical extension OIDs.
*/
public Set getCriticalExtensionOIDs()
{
return CertUtils.getCriticalExtensionOIDs(extensions);
}
/**
* Returns a set of ASN1ObjectIdentifier objects representing the OIDs of the
* non-critical extensions contained in this holder's attribute certificate.
*
* @return a set of non-critical extension OIDs.
*/
public Set getNonCriticalExtensionOIDs()
{
return CertUtils.getNonCriticalExtensionOIDs(extensions);
}
public boolean[] getIssuerUniqueID()
{
return CertUtils.bitStringToBoolean(attrCert.getAcinfo().getIssuerUniqueID());
}
/**
* Return the details of the signature algorithm used to create this attribute certificate.
*
* @return the AlgorithmIdentifier describing the signature algorithm used to create this attribute certificate.
*/
public AlgorithmIdentifier getSignatureAlgorithm()
{
return attrCert.getSignatureAlgorithm();
}
/**
* Return the bytes making up the signature associated with this attribute certificate.
*
* @return the attribute certificate signature bytes.
*/
public byte[] getSignature()
{
return attrCert.getSignatureValue().getBytes();
}
/**
* Return the underlying ASN.1 structure for the attribute certificate in this holder.
*
* @return a AttributeCertificate object.
*/
public AttributeCertificate toASN1Structure()
{
return attrCert;
}
/**
* Return whether or not this attribute certificate is valid on a particular date.
*
* @param date the date of interest.
* @return true if the attribute certificate is valid, false otherwise.
*/
public boolean isValidOn(Date date)
{
AttCertValidityPeriod certValidityPeriod = attrCert.getAcinfo().getAttrCertValidityPeriod();
return !date.before(CertUtils.recoverDate(certValidityPeriod.getNotBeforeTime())) && !date.after(CertUtils.recoverDate(certValidityPeriod.getNotAfterTime()));
}
/**
* Validate the signature on the attribute certificate in this holder.
*
* @param verifierProvider a ContentVerifierProvider that can generate a verifier for the signature.
* @return true if the signature is valid, false otherwise.
* @throws CertException if the signature cannot be processed or is inappropriate.
*/
public boolean isSignatureValid(ContentVerifierProvider verifierProvider)
throws CertException
{
AttributeCertificateInfo acinfo = attrCert.getAcinfo();
if (!acinfo.getSignature().equals(attrCert.getSignatureAlgorithm()))
{
throw new CertException("signature invalid - algorithm identifier mismatch");
}
ContentVerifier verifier;
try
{
verifier = verifierProvider.get((acinfo.getSignature()));
OutputStream sOut = verifier.getOutputStream();
sOut.write(acinfo.getDEREncoded());
sOut.close();
}
catch (Exception e)
{
throw new CertException("unable to process signature: " + e.getMessage(), e);
}
return verifier.verify(attrCert.getSignatureValue().getBytes());
}
public boolean equals(
Object o)
{
if (o == this)
{
return true;
}
if (!(o instanceof X509AttributeCertificateHolder))
{
return false;
}
X509AttributeCertificateHolder other = (X509AttributeCertificateHolder)o;
return this.attrCert.equals(other.attrCert);
}
public int hashCode()
{
return this.attrCert.hashCode();
}
}