rfc3281certpathutilities.java

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package org.bouncycastle.jce.provider;

import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.x509.CRLDistPoint;
import org.bouncycastle.asn1.x509.CRLReason;
import org.bouncycastle.asn1.x509.DistributionPoint;
import org.bouncycastle.asn1.x509.DistributionPointName;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.GeneralNames;
import org.bouncycastle.asn1.x509.TargetInformation;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.jce.exception.ExtCertPathValidatorException;
import org.bouncycastle.x509.ExtendedPKIXBuilderParameters;
import org.bouncycastle.x509.ExtendedPKIXParameters;
import org.bouncycastle.x509.PKIXAttrCertChecker;
import org.bouncycastle.x509.X509AttributeCertificate;
import org.bouncycastle.x509.X509CertStoreSelector;

import java.io.IOException;
import java.security.InvalidAlgorithmParameterException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Principal;
import java.security.PublicKey;
import java.security.cert.CertPath;
import java.security.cert.CertPathBuilder;
import java.security.cert.CertPathBuilderException;
import java.security.cert.CertPathBuilderResult;
import java.security.cert.CertPathValidator;
import java.security.cert.CertPathValidatorException;
import java.security.cert.CertPathValidatorResult;
import java.security.cert.CertificateExpiredException;
import java.security.cert.CertificateNotYetValidException;
import java.security.cert.TrustAnchor;
import java.security.cert.X509CRL;
import java.security.cert.X509Certificate;
import java.util.Date;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import javax.security.auth.x500.X500Principal;

class RFC3281CertPathUtilities
{

    private static final String TARGET_INFORMATION = X509Extensions.TargetInformation
        .getId();

    private static final String NO_REV_AVAIL = X509Extensions.NoRevAvail
        .getId();

    private static final String CRL_DISTRIBUTION_POINTS = X509Extensions.CRLDistributionPoints
        .getId();

    private static final String AUTHORITY_INFO_ACCESS = X509Extensions.AuthorityInfoAccess
        .getId();

    protected static void processAttrCert7(X509AttributeCertificate attrCert,
        CertPath certPath, CertPath holderCertPath,
        ExtendedPKIXParameters pkixParams) throws CertPathValidatorException
    {
        // TODO:
        // AA Controls
        // Attribute encryption
        // Proxy
        Set set = attrCert.getCriticalExtensionOIDs();
        // 7.1
        // process extensions

        // target information checked in step 6 / X509AttributeCertStoreSelector
        if (set.contains(TARGET_INFORMATION))
        {
            try
            {
                TargetInformation.getInstance(CertPathValidatorUtilities
                    .getExtensionValue(attrCert, TARGET_INFORMATION));
            }
            catch (AnnotatedException e)
            {
                throw new ExtCertPathValidatorException(
                    "Target information extension could not be read.", e);
            }
            catch (IllegalArgumentException e)
            {
                throw new ExtCertPathValidatorException(
                    "Target information extension could not be read.", e);
            }
        }
        set.remove(TARGET_INFORMATION);
        for (Iterator it = pkixParams.getAttrCertCheckers().iterator(); it
            .hasNext();)
        {
            ((PKIXAttrCertChecker) it.next()).check(attrCert, certPath,
                holderCertPath, set);
        }
        if (!set.isEmpty())
        {
            throw new CertPathValidatorException(
                "Attribute certificate contains unsupported critical extensions: "
                    + set);
        }
    }

    /**
     * Checks if an attribute certificate is revoked.
     * 
     * @param attrCert Attribute certificate to check if it is revoked.
     * @param paramsPKIX PKIX parameters.
     * @param issuerCert The issuer certificate of the attribute certificate
     *            <code>attrCert</code>.
     * @param validDate The date when the certificate revocation status should
     *            be checked.
     * @param certPathCerts The certificates of the certification path to be
     *            checked.
     * 
     * @throws CertPathValidatorException if the certificate is revoked or the
     *             status cannot be checked or some error occurs.
     */
    protected static void checkCRLs(X509AttributeCertificate attrCert,
        ExtendedPKIXParameters paramsPKIX, X509Certificate issuerCert,
        Date validDate, List certPathCerts) throws CertPathValidatorException
    {
        if (paramsPKIX.isRevocationEnabled())
        {
            // check if revocation is available
            if (attrCert.getExtensionValue(NO_REV_AVAIL) == null)
            {
                CRLDistPoint crldp = null;
                try
                {
                    crldp = CRLDistPoint.getInstance(CertPathValidatorUtilities
                        .getExtensionValue(attrCert, CRL_DISTRIBUTION_POINTS));
                }
                catch (AnnotatedException e)
                {
                    throw new CertPathValidatorException(
                        "CRL distribution point extension could not be read.",
                        e);
                }
                try
                {
                    CertPathValidatorUtilities
                        .addAdditionalStoresFromCRLDistributionPoint(crldp,
                            paramsPKIX);
                }
                catch (AnnotatedException e)
                {
                    throw new CertPathValidatorException(
                        "No additional CRL locations could be decoded from CRL distribution point extension.",
                        e);
                }
                CertStatus certStatus = new CertStatus();
                ReasonsMask reasonsMask = new ReasonsMask();

                AnnotatedException lastException = null;
                boolean validCrlFound = false;
                // for each distribution point
                if (crldp != null)
                {
                    DistributionPoint dps[] = null;
                    try
                    {
                        dps = crldp.getDistributionPoints();
                    }
                    catch (Exception e)
                    {
                        throw new ExtCertPathValidatorException(
                            "Distribution points could not be read.", e);
                    }
                    try
                    {
                        for (int i = 0; i < dps.length
                            && certStatus.getCertStatus() == CertStatus.UNREVOKED
                            && !reasonsMask.isAllReasons(); i++)
                        {
                            ExtendedPKIXParameters paramsPKIXClone = (ExtendedPKIXParameters) paramsPKIX
                                .clone();
                            checkCRL(dps[i], attrCert, paramsPKIXClone,
                                validDate, issuerCert, certStatus, reasonsMask,
                                certPathCerts);
                            validCrlFound = true;
                        }
                    }
                    catch (AnnotatedException e)
                    {
                        lastException = new AnnotatedException(
                            "No valid CRL for distribution point found.", e);
                    }
                }

                /*
                 * If the revocation status has not been determined, repeat the
                 * process above with any available CRLs not specified in a
                 * distribution point but issued by the certificate issuer.
                 */

                if (certStatus.getCertStatus() == CertStatus.UNREVOKED
                    && !reasonsMask.isAllReasons())
                {
                    try
                    {
                        /*
                         * assume a DP with both the reasons and the cRLIssuer
                         * fields omitted and a distribution point name of the
                         * certificate issuer.
                         */
                        DERObject issuer = null;
                        try
                        {

                            issuer = new ASN1InputStream(
                                ((X500Principal) attrCert.getIssuer()
                                    .getPrincipals()[0]).getEncoded())
                                .readObject();
                        }
                        catch (Exception e)
                        {
                            throw new AnnotatedException(
                                "Issuer from certificate for CRL could not be reencoded.",
                                e);
                        }
                        DistributionPoint dp = new DistributionPoint(
                            new DistributionPointName(0, new GeneralNames(
                                new GeneralName(GeneralName.directoryName,
                                    issuer))), null, null);
                        ExtendedPKIXParameters paramsPKIXClone = (ExtendedPKIXParameters) paramsPKIX
                            .clone();
                        checkCRL(dp, attrCert, paramsPKIXClone, validDate,
                            issuerCert, certStatus, reasonsMask, certPathCerts);
                        validCrlFound = true;
                    }
                    catch (AnnotatedException e)
                    {
                        lastException = new AnnotatedException(
                            "No valid CRL for distribution point found.", e);
                    }
                }

                if (!validCrlFound)
                {
                    throw new ExtCertPathValidatorException(
                        "No valid CRL found.", lastException);
                }
                if (certStatus.getCertStatus() != CertStatus.UNREVOKED)
                {
                    String message = "Attribute certificate revocation after "
                        + certStatus.getRevocationDate();
                    message += ", reason: "
                        + RFC3280CertPathUtilities.crlReasons[certStatus
                            .getCertStatus()];
                    throw new CertPathValidatorException(message);
                }
                if (!reasonsMask.isAllReasons()
                    && certStatus.getCertStatus() == CertStatus.UNREVOKED)
                {
                    certStatus.setCertStatus(CertStatus.UNDETERMINED);
                }
                if (certStatus.getCertStatus() == CertStatus.UNDETERMINED)
                {
                    throw new CertPathValidatorException(
                        "Attribute certificate status could not be determined.");
                }

            }
            else
            {
                if (attrCert.getExtensionValue(CRL_DISTRIBUTION_POINTS) != null
                    || attrCert.getExtensionValue(AUTHORITY_INFO_ACCESS) != null)
                {
                    throw new CertPathValidatorException(
                        "No rev avail extension is set, but also an AC revocation pointer.");
                }
            }
        }
    }

    protected static void additionalChecks(X509AttributeCertificate attrCert,
        ExtendedPKIXParameters pkixParams) throws CertPathValidatorException
    {
        // 1
        for (Iterator it = pkixParams.getProhibitedACAttributes().iterator(); it
            .hasNext();)
        {
            String oid = (String) it.next();
            if (attrCert.getAttributes(oid) != null)
            {
                throw new CertPathValidatorException(
                    "Attribute certificate contains prohibited attribute: "
                        + oid + ".");
            }
        }
        for (Iterator it = pkixParams.getNecessaryACAttributes().iterator(); it
            .hasNext();)
        {
            String oid = (String) it.next();
            if (attrCert.getAttributes(oid) == null)
            {
                throw new CertPathValidatorException(
                    "Attribute certificate does not contain necessary attribute: "
                        + oid + ".");
            }
        }
    }

    protected static void processAttrCert5(X509AttributeCertificate attrCert,
        ExtendedPKIXParameters pkixParams) throws CertPathValidatorException
    {
        try
        {
            attrCert.checkValidity(CertPathValidatorUtilities
                .getValidDate(pkixParams));
        }
        catch (CertificateExpiredException e)
        {
            throw new ExtCertPathValidatorException(
                "Attribute certificate is not valid.", e);
        }
        catch (CertificateNotYetValidException e)
        {
            throw new ExtCertPathValidatorException(
                "Attribute certificate is not valid.", e);
        }
    }

    protected static void processAttrCert4(X509Certificate acIssuerCert,
        ExtendedPKIXParameters pkixParams) throws CertPathValidatorException
    {
        Set set = pkixParams.getTrustedACIssuers();
        boolean trusted = false;
        for (Iterator it = set.iterator(); it.hasNext();)
        {
            TrustAnchor anchor = (TrustAnchor) it.next();
            if (acIssuerCert.getSubjectX500Principal().getName("RFC2253")
                .equals(anchor.getCAName())
                || acIssuerCert.equals(anchor.getTrustedCert()))
            {
                trusted = true;
            }
        }
        if (!trusted)
        {
            throw new CertPathValidatorException(
                "Attribute certificate issuer is not directly trusted.");
        }
    }

    protected static void processAttrCert3(X509Certificate acIssuerCert,
        ExtendedPKIXParameters pkixParams) throws CertPathValidatorException
    {