Examples with Extension org.bouncycastle.asn1.x509.Extension used on opensource projects

Example 26 with Extension

use of org.bouncycastle.asn1.x509.Extension in project XobotOS by xamarin.

the class RFC3280CertPathUtilities method processCRLF.

/**
     * Obtain and validate the certification path for the complete CRL issuer.
     * If a key usage extension is present in the CRL issuer's certificate,
     * verify that the cRLSign bit is set.
     *
     * @param crl                CRL which contains revocation information for the certificate
     *                           <code>cert</code>.
     * @param cert               The attribute certificate or certificate to check if it is
     *                           revoked.
     * @param defaultCRLSignCert The issuer certificate of the certificate <code>cert</code>.
     * @param defaultCRLSignKey  The public key of the issuer certificate
     *                           <code>defaultCRLSignCert</code>.
     * @param paramsPKIX         paramsPKIX PKIX parameters.
     * @param certPathCerts      The certificates on the certification path.
     * @return A <code>Set</code> with all keys of possible CRL issuer
     *         certificates.
     * @throws AnnotatedException if the CRL is not valid or the status cannot be checked or
     *                            some error occurs.
     */
protected static Set processCRLF(X509CRL crl, Object cert, X509Certificate defaultCRLSignCert, PublicKey defaultCRLSignKey, ExtendedPKIXParameters paramsPKIX, List certPathCerts) throws AnnotatedException {
    // (f)
    // get issuer from CRL
    X509CertStoreSelector selector = new X509CertStoreSelector();
    try {
        byte[] issuerPrincipal = CertPathValidatorUtilities.getIssuerPrincipal(crl).getEncoded();
        selector.setSubject(issuerPrincipal);
    } catch (IOException e) {
        throw new AnnotatedException("Subject criteria for certificate selector to find issuer certificate for CRL could not be set.", e);
    }
    // get CRL signing certs
    Collection coll;
    try {
        coll = CertPathValidatorUtilities.findCertificates(selector, paramsPKIX.getStores());
        coll.addAll(CertPathValidatorUtilities.findCertificates(selector, paramsPKIX.getAdditionalStores()));
        coll.addAll(CertPathValidatorUtilities.findCertificates(selector, paramsPKIX.getCertStores()));
    } catch (AnnotatedException e) {
        throw new AnnotatedException("Issuer certificate for CRL cannot be searched.", e);
    }
    coll.add(defaultCRLSignCert);
    Iterator cert_it = coll.iterator();
    List validCerts = new ArrayList();
    List validKeys = new ArrayList();
    while (cert_it.hasNext()) {
        X509Certificate signingCert = (X509Certificate) cert_it.next();
        /*
             * CA of the certificate, for which this CRL is checked, has also
             * signed CRL, so skip the path validation, because is already done
             */
        if (signingCert.equals(defaultCRLSignCert)) {
            validCerts.add(signingCert);
            validKeys.add(defaultCRLSignKey);
            continue;
        }
        try {
            CertPathBuilder builder = CertPathBuilder.getInstance("PKIX", BouncyCastleProvider.PROVIDER_NAME);
            selector = new X509CertStoreSelector();
            selector.setCertificate(signingCert);
            ExtendedPKIXParameters temp = (ExtendedPKIXParameters) paramsPKIX.clone();
            temp.setTargetCertConstraints(selector);
            ExtendedPKIXBuilderParameters params = (ExtendedPKIXBuilderParameters) ExtendedPKIXBuilderParameters.getInstance(temp);
            /*
                 * if signingCert is placed not higher on the cert path a
                 * dependency loop results. CRL for cert is checked, but
                 * signingCert is needed for checking the CRL which is dependent
                 * on checking cert because it is higher in the cert path and so
                 * signing signingCert transitively. so, revocation is disabled,
                 * forgery attacks of the CRL are detected in this outer loop
                 * for all other it must be enabled to prevent forgery attacks
                 */
            if (certPathCerts.contains(signingCert)) {
                params.setRevocationEnabled(false);
            } else {
                params.setRevocationEnabled(true);
            }
            List certs = builder.build(params).getCertPath().getCertificates();
            validCerts.add(signingCert);
            validKeys.add(CertPathValidatorUtilities.getNextWorkingKey(certs, 0));
        } catch (CertPathBuilderException e) {
            throw new AnnotatedException("Internal error.", e);
        } catch (CertPathValidatorException e) {
            throw new AnnotatedException("Public key of issuer certificate of CRL could not be retrieved.", e);
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage());
        }
    }
    Set checkKeys = new HashSet();
    AnnotatedException lastException = null;
    for (int i = 0; i < validCerts.size(); i++) {
        X509Certificate signCert = (X509Certificate) validCerts.get(i);
        boolean[] keyusage = signCert.getKeyUsage();
        if (keyusage != null && (keyusage.length < 7 || !keyusage[CRL_SIGN])) {
            lastException = new AnnotatedException("Issuer certificate key usage extension does not permit CRL signing.");
        } else {
            checkKeys.add(validKeys.get(i));
        }
    }
    if (checkKeys.isEmpty() && lastException == null) {
        throw new AnnotatedException("Cannot find a valid issuer certificate.");
    }
    if (checkKeys.isEmpty() && lastException != null) {
        throw lastException;
    }
    return checkKeys;
}

Example 27 with Extension

use of org.bouncycastle.asn1.x509.Extension in project XobotOS by xamarin.

the class RFC3280CertPathUtilities method processCRLC.

/**
     * If use-deltas is set, verify the issuer and scope of the delta CRL.
     *
     * @param deltaCRL    The delta CRL.
     * @param completeCRL The complete CRL.
     * @param pkixParams  The PKIX paramaters.
     * @throws AnnotatedException if an exception occurs.
     */
protected static void processCRLC(X509CRL deltaCRL, X509CRL completeCRL, ExtendedPKIXParameters pkixParams) throws AnnotatedException {
    if (deltaCRL == null) {
        return;
    }
    IssuingDistributionPoint completeidp = null;
    try {
        completeidp = IssuingDistributionPoint.getInstance(CertPathValidatorUtilities.getExtensionValue(completeCRL, RFC3280CertPathUtilities.ISSUING_DISTRIBUTION_POINT));
    } catch (Exception e) {
        throw new AnnotatedException("Issuing distribution point extension could not be decoded.", e);
    }
    if (pkixParams.isUseDeltasEnabled()) {
        // (c) (1)
        if (!deltaCRL.getIssuerX500Principal().equals(completeCRL.getIssuerX500Principal())) {
            throw new AnnotatedException("Complete CRL issuer does not match delta CRL issuer.");
        }
        // (c) (2)
        IssuingDistributionPoint deltaidp = null;
        try {
            deltaidp = IssuingDistributionPoint.getInstance(CertPathValidatorUtilities.getExtensionValue(deltaCRL, ISSUING_DISTRIBUTION_POINT));
        } catch (Exception e) {
            throw new AnnotatedException("Issuing distribution point extension from delta CRL could not be decoded.", e);
        }
        boolean match = false;
        if (completeidp == null) {
            if (deltaidp == null) {
                match = true;
            }
        } else {
            if (completeidp.equals(deltaidp)) {
                match = true;
            }
        }
        if (!match) {
            throw new AnnotatedException("Issuing distribution point extension from delta CRL and complete CRL does not match.");
        }
        // (c) (3)
        DERObject completeKeyIdentifier = null;
        try {
            completeKeyIdentifier = CertPathValidatorUtilities.getExtensionValue(completeCRL, AUTHORITY_KEY_IDENTIFIER);
        } catch (AnnotatedException e) {
            throw new AnnotatedException("Authority key identifier extension could not be extracted from complete CRL.", e);
        }
        DERObject deltaKeyIdentifier = null;
        try {
            deltaKeyIdentifier = CertPathValidatorUtilities.getExtensionValue(deltaCRL, AUTHORITY_KEY_IDENTIFIER);
        } catch (AnnotatedException e) {
            throw new AnnotatedException("Authority key identifier extension could not be extracted from delta CRL.", e);
        }
        if (completeKeyIdentifier == null) {
            throw new AnnotatedException("CRL authority key identifier is null.");
        }
        if (deltaKeyIdentifier == null) {
            throw new AnnotatedException("Delta CRL authority key identifier is null.");
        }
        if (!completeKeyIdentifier.equals(deltaKeyIdentifier)) {
            throw new AnnotatedException("Delta CRL authority key identifier does not match complete CRL authority key identifier.");
        }
    }
}

Example 28 with Extension

use of org.bouncycastle.asn1.x509.Extension in project XobotOS by xamarin.

the class RFC3280CertPathUtilities method processCRLB1.

/**
     * If the DP includes cRLIssuer, then verify that the issuer field in the
     * complete CRL matches cRLIssuer in the DP and that the complete CRL
     * contains an issuing distribution point extension with the indirectCRL
     * boolean asserted. Otherwise, verify that the CRL issuer matches the
     * certificate issuer.
     *
     * @param dp   The distribution point.
     * @param cert The certificate ot attribute certificate.
     * @param crl  The CRL for <code>cert</code>.
     * @throws AnnotatedException if one of the above conditions does not apply or an error
     *                            occurs.
     */
protected static void processCRLB1(DistributionPoint dp, Object cert, X509CRL crl) throws AnnotatedException {
    DERObject idp = CertPathValidatorUtilities.getExtensionValue(crl, ISSUING_DISTRIBUTION_POINT);
    boolean isIndirect = false;
    if (idp != null) {
        if (IssuingDistributionPoint.getInstance(idp).isIndirectCRL()) {
            isIndirect = true;
        }
    }
    byte[] issuerBytes = CertPathValidatorUtilities.getIssuerPrincipal(crl).getEncoded();
    boolean matchIssuer = false;
    if (dp.getCRLIssuer() != null) {
        GeneralName[] genNames = dp.getCRLIssuer().getNames();
        for (int j = 0; j < genNames.length; j++) {
            if (genNames[j].getTagNo() == GeneralName.directoryName) {
                try {
                    if (Arrays.areEqual(genNames[j].getName().getDERObject().getEncoded(), issuerBytes)) {
                        matchIssuer = true;
                    }
                } catch (IOException e) {
                    throw new AnnotatedException("CRL issuer information from distribution point cannot be decoded.", e);
                }
            }
        }
        if (matchIssuer && !isIndirect) {
            throw new AnnotatedException("Distribution point contains cRLIssuer field but CRL is not indirect.");
        }
        if (!matchIssuer) {
            throw new AnnotatedException("CRL issuer of CRL does not match CRL issuer of distribution point.");
        }
    } else {
        if (CertPathValidatorUtilities.getIssuerPrincipal(crl).equals(CertPathValidatorUtilities.getEncodedIssuerPrincipal(cert))) {
            matchIssuer = true;
        }
    }
    if (!matchIssuer) {
        throw new AnnotatedException("Cannot find matching CRL issuer for certificate.");
    }
}

Example 29 with Extension

use of org.bouncycastle.asn1.x509.Extension in project XobotOS by xamarin.

the class RFC3280CertPathUtilities method processCertBC.

protected static void processCertBC(CertPath certPath, int index, PKIXNameConstraintValidator nameConstraintValidator) throws CertPathValidatorException {
    List certs = certPath.getCertificates();
    X509Certificate cert = (X509Certificate) certs.get(index);
    int n = certs.size();
    // i as defined in the algorithm description
    int i = n - index;
    //
    if (!(CertPathValidatorUtilities.isSelfIssued(cert) && (i < n))) {
        X500Principal principal = CertPathValidatorUtilities.getSubjectPrincipal(cert);
        ASN1InputStream aIn = new ASN1InputStream(principal.getEncoded());
        ASN1Sequence dns;
        try {
            dns = DERSequence.getInstance(aIn.readObject());
        } catch (Exception e) {
            throw new CertPathValidatorException("Exception extracting subject name when checking subtrees.", e, certPath, index);
        }
        try {
            nameConstraintValidator.checkPermittedDN(dns);
            nameConstraintValidator.checkExcludedDN(dns);
        } catch (PKIXNameConstraintValidatorException e) {
            throw new CertPathValidatorException("Subtree check for certificate subject failed.", e, certPath, index);
        }
        GeneralNames altName = null;
        try {
            altName = GeneralNames.getInstance(CertPathValidatorUtilities.getExtensionValue(cert, RFC3280CertPathUtilities.SUBJECT_ALTERNATIVE_NAME));
        } catch (Exception e) {
            throw new CertPathValidatorException("Subject alternative name extension could not be decoded.", e, certPath, index);
        }
        Vector emails = new X509Name(dns).getValues(X509Name.EmailAddress);
        for (Enumeration e = emails.elements(); e.hasMoreElements(); ) {
            String email = (String) e.nextElement();
            GeneralName emailAsGeneralName = new GeneralName(GeneralName.rfc822Name, email);
            try {
                nameConstraintValidator.checkPermitted(emailAsGeneralName);
                nameConstraintValidator.checkExcluded(emailAsGeneralName);
            } catch (PKIXNameConstraintValidatorException ex) {
                throw new CertPathValidatorException("Subtree check for certificate subject alternative email failed.", ex, certPath, index);
            }
        }
        if (altName != null) {
            GeneralName[] genNames = null;
            try {
                genNames = altName.getNames();
            } catch (Exception e) {
                throw new CertPathValidatorException("Subject alternative name contents could not be decoded.", e, certPath, index);
            }
            for (int j = 0; j < genNames.length; j++) {
                try {
                    nameConstraintValidator.checkPermitted(genNames[j]);
                    nameConstraintValidator.checkExcluded(genNames[j]);
                } catch (PKIXNameConstraintValidatorException e) {
                    throw new CertPathValidatorException("Subtree check for certificate subject alternative name failed.", e, certPath, index);
                }
            }
        }
    }
}

Example 30 with Extension

use of org.bouncycastle.asn1.x509.Extension in project XobotOS by xamarin.

the class RFC3280CertPathUtilities method prepareNextCertA.

protected static void prepareNextCertA(CertPath certPath, int index) throws CertPathValidatorException {
    List certs = certPath.getCertificates();
    X509Certificate cert = (X509Certificate) certs.get(index);
    //
    //
    // (a) check the policy mappings
    //
    ASN1Sequence pm = null;
    try {
        pm = DERSequence.getInstance(CertPathValidatorUtilities.getExtensionValue(cert, RFC3280CertPathUtilities.POLICY_MAPPINGS));
    } catch (AnnotatedException ex) {
        throw new ExtCertPathValidatorException("Policy mappings extension could not be decoded.", ex, certPath, index);
    }
    if (pm != null) {
        ASN1Sequence mappings = pm;
        for (int j = 0; j < mappings.size(); j++) {
            DERObjectIdentifier issuerDomainPolicy = null;
            DERObjectIdentifier subjectDomainPolicy = null;
            try {
                ASN1Sequence mapping = DERSequence.getInstance(mappings.getObjectAt(j));
                issuerDomainPolicy = DERObjectIdentifier.getInstance(mapping.getObjectAt(0));
                subjectDomainPolicy = DERObjectIdentifier.getInstance(mapping.getObjectAt(1));
            } catch (Exception e) {
                throw new ExtCertPathValidatorException("Policy mappings extension contents could not be decoded.", e, certPath, index);
            }
            if (RFC3280CertPathUtilities.ANY_POLICY.equals(issuerDomainPolicy.getId())) {
                throw new CertPathValidatorException("IssuerDomainPolicy is anyPolicy", null, certPath, index);
            }
            if (RFC3280CertPathUtilities.ANY_POLICY.equals(subjectDomainPolicy.getId())) {
                throw new CertPathValidatorException("SubjectDomainPolicy is anyPolicy,", null, certPath, index);
            }
        }
    }
}