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package org.spongycastle.cert;
import java.math.BigInteger;
import java.util.Date;
import org.spongycastle.asn1.ASN1Encodable;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.x500.X500Name;
import org.spongycastle.asn1.x509.Certificate;
import org.spongycastle.asn1.x509.Extension;
import org.spongycastle.asn1.x509.ExtensionsGenerator;
import org.spongycastle.asn1.x509.SubjectPublicKeyInfo;
import org.spongycastle.asn1.x509.Time;
import org.spongycastle.asn1.x509.V3TBSCertificateGenerator;
import org.spongycastle.operator.ContentSigner;
/**
* class to produce an X.509 Version 3 certificate.
*/
public class X509v3CertificateBuilder
{
private V3TBSCertificateGenerator tbsGen;
private ExtensionsGenerator extGenerator;
/**
* Create a builder for a version 3 certificate.
*
* @param issuer the certificate issuer
* @param serial the certificate serial number
* @param notBefore the date before which the certificate is not valid
* @param notAfter the date after which the certificate is not valid
* @param subject the certificate subject
* @param publicKeyInfo the info structure for the public key to be associated with this certificate.
*/
public X509v3CertificateBuilder(X500Name issuer, BigInteger serial, Date notBefore, Date notAfter, X500Name subject, SubjectPublicKeyInfo publicKeyInfo)
{
tbsGen = new V3TBSCertificateGenerator();
tbsGen.setSerialNumber(new ASN1Integer(serial));
tbsGen.setIssuer(issuer);
tbsGen.setStartDate(new Time(notBefore));
tbsGen.setEndDate(new Time(notAfter));
tbsGen.setSubject(subject);
tbsGen.setSubjectPublicKeyInfo(publicKeyInfo);
extGenerator = new ExtensionsGenerator();
}
/**
* Set the subjectUniqueID - note: it is very rare that it is correct to do this.
*
* @param uniqueID a boolean array representing the bits making up the subjectUniqueID.
* @return this builder object.
*/
public X509v3CertificateBuilder setSubjectUniqueID(boolean[] uniqueID)
{
tbsGen.setSubjectUniqueID(CertUtils.booleanToBitString(uniqueID));
return this;
}
/**
* Set the issuerUniqueID - note: it is very rare that it is correct to do this.
*
* @param uniqueID a boolean array representing the bits making up the issuerUniqueID.
* @return this builder object.
*/
public X509v3CertificateBuilder setIssuerUniqueID(boolean[] uniqueID)
{
tbsGen.setIssuerUniqueID(CertUtils.booleanToBitString(uniqueID));
return this;
}
/**
* Add a given extension field for the standard extensions tag (tag 3)
*
* @param oid the OID defining the extension type.
* @param isCritical true if the extension is critical, false otherwise.
* @param value the ASN.1 structure that forms the extension's value.
* @return this builder object.
*/
public X509v3CertificateBuilder addExtension(
ASN1ObjectIdentifier oid,
boolean isCritical,
ASN1Encodable value)
throws CertIOException
{
CertUtils.addExtension(extGenerator, oid, isCritical, value);
return this;
}
/**
* Add a given extension field for the standard extensions tag (tag 3)
* copying the extension value from another certificate.
*
* @param oid the OID defining the extension type.
* @param isCritical true if the copied extension is to be marked as critical, false otherwise.
* @param certHolder the holder for the certificate that the extension is to be copied from.
* @return this builder object.
*/
public X509v3CertificateBuilder copyAndAddExtension(
ASN1ObjectIdentifier oid,
boolean isCritical,
X509CertificateHolder certHolder)
{
Certificate cert = certHolder.toASN1Structure();
Extension extension = cert.getTBSCertificate().getExtensions().getExtension(oid);
if (extension == null)
{
throw new NullPointerException("extension " + oid + " not present");
}
extGenerator.addExtension(oid, isCritical, extension.getExtnValue().getOctets());
return this;
}
/**
* Generate an X.509 certificate, based on the current issuer and subject
* using the passed in signer.
*
* @param signer the content signer to be used to generate the signature validating the certificate.
* @return a holder containing the resulting signed certificate.
*/
public X509CertificateHolder build(
ContentSigner signer)
{
tbsGen.setSignature(signer.getAlgorithmIdentifier());
if (!extGenerator.isEmpty())
{
tbsGen.setExtensions(extGenerator.generate());
}
return CertUtils.generateFullCert(signer, tbsGen.generateTBSCertificate());
}
}
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