org.bouncycastle.cert.path.validations.KeyUsageValidation Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcpkix-lts8on Show documentation

The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.8 and up. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

There is a newer version: 2.73.7

Show newest version

package org.bouncycastle.cert.path.validations;

import org.bouncycastle.asn1.x509.Extension;
import org.bouncycastle.asn1.x509.KeyUsage;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.cert.path.CertPathValidation;
import org.bouncycastle.cert.path.CertPathValidationContext;
import org.bouncycastle.cert.path.CertPathValidationException;
import org.bouncycastle.util.Memoable;

public class KeyUsageValidation
    implements CertPathValidation
{
    private boolean          isMandatory;

    public KeyUsageValidation()
    {
        this(true);
    }

    public KeyUsageValidation(boolean isMandatory)
    {
        this.isMandatory = isMandatory;
    }

    public void validate(CertPathValidationContext context, X509CertificateHolder certificate)
        throws CertPathValidationException
    {
        context.addHandledExtension(Extension.keyUsage);

        if (!context.isEndEntity())
        {
            KeyUsage usage = KeyUsage.fromExtensions(certificate.getExtensions());

            if (usage != null)
            {
                if (!usage.hasUsages(KeyUsage.keyCertSign))
                {
                    throw new CertPathValidationException("Issuer certificate KeyUsage extension does not permit key signing");
                }
            }
            else
            {
                if (isMandatory)
                {
                    throw new CertPathValidationException("KeyUsage extension not present in CA certificate");
                }
            }
        }
    }

    public Memoable copy()
    {
        return new KeyUsageValidation(isMandatory);
    }

    public void reset(Memoable other)
    {
        KeyUsageValidation v = (KeyUsageValidation)other;

        this.isMandatory = v.isMandatory;
    }
}