Example usage for org.bouncycastle.asn1.crmf POPOSigningKey POPOSigningKey

Introduction

In this page you can find the example usage for org.bouncycastle.asn1.crmf POPOSigningKey POPOSigningKey.

Prototype

public POPOSigningKey(POPOSigningKeyInput poposkIn, AlgorithmIdentifier aid, DERBitString signature) 

Source Link

Document

Creates a new Proof of Possession object for a signing key.

Usage

From source file:org.ejbca.core.protocol.cmp.CmpTestCase.java

License:Open Source License

protected static PKIMessage genCertReq(String issuerDN, X500Name userDN, String altNames, KeyPair keys,
        Certificate cacert, byte[] nonce, byte[] transid, boolean raVerifiedPopo, Extensions extensions,
        Date notBefore, Date notAfter, BigInteger customCertSerno, AlgorithmIdentifier pAlg,
        DEROctetString senderKID) throws NoSuchAlgorithmException, NoSuchProviderException, IOException,
        InvalidKeyException, SignatureException {
    ASN1EncodableVector optionalValidityV = new ASN1EncodableVector();
    org.bouncycastle.asn1.x509.Time nb = new org.bouncycastle.asn1.x509.Time(
            new DERGeneralizedTime("20030211002120Z"));
    if (notBefore != null) {
        nb = new org.bouncycastle.asn1.x509.Time(notBefore);
    }/*from  w ww.  ja  va 2  s  . c o  m*/
    optionalValidityV.add(new DERTaggedObject(true, 0, nb));
    org.bouncycastle.asn1.x509.Time na = new org.bouncycastle.asn1.x509.Time(new Date());
    if (notAfter != null) {
        na = new org.bouncycastle.asn1.x509.Time(notAfter);
    }
    optionalValidityV.add(new DERTaggedObject(true, 1, na));
    OptionalValidity myOptionalValidity = OptionalValidity.getInstance(new DERSequence(optionalValidityV));

    CertTemplateBuilder myCertTemplate = new CertTemplateBuilder();
    myCertTemplate.setValidity(myOptionalValidity);
    if (issuerDN != null) {
        myCertTemplate.setIssuer(new X500Name(issuerDN));
    }
    myCertTemplate.setSubject(userDN);
    byte[] bytes = keys.getPublic().getEncoded();
    ByteArrayInputStream bIn = new ByteArrayInputStream(bytes);
    ASN1InputStream dIn = new ASN1InputStream(bIn);
    SubjectPublicKeyInfo keyInfo = new SubjectPublicKeyInfo((ASN1Sequence) dIn.readObject());
    dIn.close();
    myCertTemplate.setPublicKey(keyInfo);
    // If we did not pass any extensions as parameter, we will create some of our own, standard ones
    Extensions exts = extensions;
    if (exts == null) {

        // SubjectAltName
        // Some altNames
        ByteArrayOutputStream bOut = new ByteArrayOutputStream();
        ASN1OutputStream dOut = new ASN1OutputStream(bOut);
        ExtensionsGenerator extgen = new ExtensionsGenerator();
        if (altNames != null) {
            GeneralNames san = CertTools.getGeneralNamesFromAltName(altNames);
            dOut.writeObject(san);
            byte[] value = bOut.toByteArray();
            extgen.addExtension(Extension.subjectAlternativeName, false, value);
        }

        // KeyUsage
        int bcku = 0;
        bcku = KeyUsage.digitalSignature | KeyUsage.keyEncipherment | KeyUsage.nonRepudiation;
        KeyUsage ku = new KeyUsage(bcku);
        extgen.addExtension(Extension.keyUsage, false, new DERBitString(ku));

        // Make the complete extension package
        exts = extgen.generate();
    }
    myCertTemplate.setExtensions(exts);
    if (customCertSerno != null) {
        // Add serialNumber to the certTemplate, it is defined as a MUST NOT be used in RFC4211, but we will use it anyway in order
        // to request a custom certificate serial number (something not standard anyway)
        myCertTemplate.setSerialNumber(new ASN1Integer(customCertSerno));
    }

    CertRequest myCertRequest = new CertRequest(4, myCertTemplate.build(), null);

    // POPO
    /*
     * PKMACValue myPKMACValue = new PKMACValue( new AlgorithmIdentifier(new
     * ASN1ObjectIdentifier("8.2.1.2.3.4"), new DERBitString(new byte[] { 8,
     * 1, 1, 2 })), new DERBitString(new byte[] { 12, 29, 37, 43 }));
     * 
     * POPOPrivKey myPOPOPrivKey = new POPOPrivKey(new DERBitString(new
     * byte[] { 44 }), 2); //take choice pos tag 2
     * 
     * POPOSigningKeyInput myPOPOSigningKeyInput = new POPOSigningKeyInput(
     * myPKMACValue, new SubjectPublicKeyInfo( new AlgorithmIdentifier(new
     * ASN1ObjectIdentifier("9.3.3.9.2.2"), new DERBitString(new byte[] { 2,
     * 9, 7, 3 })), new byte[] { 7, 7, 7, 4, 5, 6, 7, 7, 7 }));
     */
    ProofOfPossession myProofOfPossession = null;
    if (raVerifiedPopo) {
        // raVerified POPO (meaning there is no POPO)
        myProofOfPossession = new ProofOfPossession();
    } else {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DEROutputStream mout = new DEROutputStream(baos);
        mout.writeObject(myCertRequest);
        mout.close();
        byte[] popoProtectionBytes = baos.toByteArray();
        String sigalg = AlgorithmTools.getSignAlgOidFromDigestAndKey(null, keys.getPrivate().getAlgorithm())
                .getId();
        Signature sig = Signature.getInstance(sigalg, "BC");
        sig.initSign(keys.getPrivate());
        sig.update(popoProtectionBytes);
        DERBitString bs = new DERBitString(sig.sign());
        POPOSigningKey myPOPOSigningKey = new POPOSigningKey(null,
                new AlgorithmIdentifier(new ASN1ObjectIdentifier(sigalg)), bs);
        myProofOfPossession = new ProofOfPossession(myPOPOSigningKey);
    }

    AttributeTypeAndValue av = new AttributeTypeAndValue(CRMFObjectIdentifiers.id_regCtrl_regToken,
            new DERUTF8String("foo123"));
    AttributeTypeAndValue[] avs = { av };

    CertReqMsg myCertReqMsg = new CertReqMsg(myCertRequest, myProofOfPossession, avs);

    CertReqMessages myCertReqMessages = new CertReqMessages(myCertReqMsg);

    PKIHeaderBuilder myPKIHeader = new PKIHeaderBuilder(2, new GeneralName(userDN), new GeneralName(
            new X500Name(issuerDN != null ? issuerDN : ((X509Certificate) cacert).getSubjectDN().getName())));

    myPKIHeader.setMessageTime(new ASN1GeneralizedTime(new Date()));
    // senderNonce
    myPKIHeader.setSenderNonce(new DEROctetString(nonce));
    // TransactionId
    myPKIHeader.setTransactionID(new DEROctetString(transid));
    myPKIHeader.setProtectionAlg(pAlg);
    myPKIHeader.setSenderKID(senderKID);

    PKIBody myPKIBody = new PKIBody(0, myCertReqMessages); // initialization
                                                           // request
    PKIMessage myPKIMessage = new PKIMessage(myPKIHeader.build(), myPKIBody);
    return myPKIMessage;
}

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From source file:org.ejbca.core.protocol.cmp.CmpTestCase.java

License:Open Source License

protected static PKIMessage genRenewalReq(X500Name userDN, Certificate cacert, byte[] nonce, byte[] transid,
        KeyPair keys, boolean raVerifiedPopo, X500Name reqSubjectDN, String reqIssuerDN,
        AlgorithmIdentifier pAlg, DEROctetString senderKID) throws IOException, NoSuchAlgorithmException,
        InvalidKeyException, SignatureException, CertificateEncodingException {

    CertTemplateBuilder myCertTemplate = new CertTemplateBuilder();

    ASN1EncodableVector optionalValidityV = new ASN1EncodableVector();
    org.bouncycastle.asn1.x509.Time nb = new org.bouncycastle.asn1.x509.Time(
            new DERGeneralizedTime("20030211002120Z"));
    org.bouncycastle.asn1.x509.Time na = new org.bouncycastle.asn1.x509.Time(new Date());
    optionalValidityV.add(new DERTaggedObject(true, 0, nb));
    optionalValidityV.add(new DERTaggedObject(true, 1, na));
    OptionalValidity myOptionalValidity = OptionalValidity.getInstance(new DERSequence(optionalValidityV));

    myCertTemplate.setValidity(myOptionalValidity);

    if (reqSubjectDN != null) {
        myCertTemplate.setSubject(reqSubjectDN);
    }/*  w  ww . j a  v  a2s  .  c o m*/
    if (reqIssuerDN != null) {
        myCertTemplate.setIssuer(new X500Name(reqIssuerDN));
    }

    byte[] bytes = keys.getPublic().getEncoded();
    ByteArrayInputStream bIn = new ByteArrayInputStream(bytes);
    ASN1InputStream dIn = new ASN1InputStream(bIn);
    try {
        SubjectPublicKeyInfo keyInfo = new SubjectPublicKeyInfo((ASN1Sequence) dIn.readObject());
        myCertTemplate.setPublicKey(keyInfo);
    } finally {
        dIn.close();
    }

    CertRequest myCertRequest = new CertRequest(4, myCertTemplate.build(), null);

    // POPO
    /*
     * PKMACValue myPKMACValue = new PKMACValue( new AlgorithmIdentifier(new
     * ASN1ObjectIdentifier("8.2.1.2.3.4"), new DERBitString(new byte[] { 8,
     * 1, 1, 2 })), new DERBitString(new byte[] { 12, 29, 37, 43 }));
     * 
     * POPOPrivKey myPOPOPrivKey = new POPOPrivKey(new DERBitString(new
     * byte[] { 44 }), 2); //take choice pos tag 2
     * 
     * POPOSigningKeyInput myPOPOSigningKeyInput = new POPOSigningKeyInput(
     * myPKMACValue, new SubjectPublicKeyInfo( new AlgorithmIdentifier(new
     * ASN1ObjectIdentifier("9.3.3.9.2.2"), new DERBitString(new byte[] { 2,
     * 9, 7, 3 })), new byte[] { 7, 7, 7, 4, 5, 6, 7, 7, 7 }));
     */
    ProofOfPossession myProofOfPossession = null;
    if (raVerifiedPopo) {
        // raVerified POPO (meaning there is no POPO)
        myProofOfPossession = new ProofOfPossession();
    } else {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DEROutputStream mout = new DEROutputStream(baos);
        mout.writeObject(myCertRequest);
        mout.close();
        byte[] popoProtectionBytes = baos.toByteArray();
        String sigalg = AlgorithmTools.getSignAlgOidFromDigestAndKey(null, keys.getPrivate().getAlgorithm())
                .getId();
        Signature sig = Signature.getInstance(sigalg);
        sig.initSign(keys.getPrivate());
        sig.update(popoProtectionBytes);

        DERBitString bs = new DERBitString(sig.sign());

        POPOSigningKey myPOPOSigningKey = new POPOSigningKey(null,
                new AlgorithmIdentifier(new ASN1ObjectIdentifier(sigalg)), bs);
        myProofOfPossession = new ProofOfPossession(myPOPOSigningKey);
    }

    // myCertReqMsg.addRegInfo(new AttributeTypeAndValue(new
    // ASN1ObjectIdentifier("1.3.6.2.2.2.2.3.1"), new
    // DERInteger(1122334455)));
    AttributeTypeAndValue av = new AttributeTypeAndValue(CRMFObjectIdentifiers.id_regCtrl_regToken,
            new DERUTF8String("foo123"));
    AttributeTypeAndValue[] avs = { av };

    CertReqMsg myCertReqMsg = new CertReqMsg(myCertRequest, myProofOfPossession, avs);

    CertReqMessages myCertReqMessages = new CertReqMessages(myCertReqMsg);

    PKIHeaderBuilder myPKIHeader = new PKIHeaderBuilder(2, new GeneralName(userDN),
            new GeneralName(new JcaX509CertificateHolder((X509Certificate) cacert).getSubject()));
    myPKIHeader.setMessageTime(new ASN1GeneralizedTime(new Date()));
    // senderNonce
    myPKIHeader.setSenderNonce(new DEROctetString(nonce));
    // TransactionId
    myPKIHeader.setTransactionID(new DEROctetString(transid));
    myPKIHeader.setProtectionAlg(pAlg);
    myPKIHeader.setSenderKID(senderKID);

    PKIBody myPKIBody = new PKIBody(PKIBody.TYPE_KEY_UPDATE_REQ, myCertReqMessages); // Key Update Request
    PKIMessage myPKIMessage = new PKIMessage(myPKIHeader.build(), myPKIBody);

    return myPKIMessage;

}

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From source file:org.ejbca.ui.cmpclient.commands.CrmfRequestCommand.java

License:Open Source License

@Override
public PKIMessage generatePKIMessage(final ParameterContainer parameters) throws Exception {

    final boolean verbose = parameters.containsKey(VERBOSE_KEY);

    final X500Name userDN = new X500Name(parameters.get(SUBJECTDN_KEY));
    final X500Name issuerDN = new X500Name(parameters.get(ISSUERDN_KEY));

    String authmodule = parameters.get(AUTHENTICATION_MODULE_KEY);
    String endentityPassword = "";
    if (authmodule != null && StringUtils.equals(authmodule, CmpConfiguration.AUTHMODULE_REG_TOKEN_PWD)) {
        endentityPassword = parameters.containsKey(AUTHENTICATION_PARAM_KEY)
                ? parameters.get(AUTHENTICATION_PARAM_KEY)
                : "foo123";
    }/*from  ww w.j a  v  a 2  s .  c  o  m*/

    String altNames = parameters.get(ALTNAME_KEY);
    String serno = parameters.get(SERNO_KEY);
    BigInteger customCertSerno = null;
    if (serno != null) {
        customCertSerno = new BigInteger(serno, 16);
    }
    boolean includePopo = parameters.containsKey(INCLUDE_POPO_KEY);

    if (verbose) {
        log.info("Creating CRMF request with: SubjectDN=" + userDN.toString());
        log.info("Creating CRMF request with: IssuerDN=" + issuerDN.toString());
        log.info("Creating CRMF request with: AuthenticationModule=" + authmodule);
        log.info("Creating CRMF request with: EndEntityPassword=" + endentityPassword);
        log.info("Creating CRMF request with: SubjectAltName=" + altNames);
        log.info("Creating CRMF request with: CustomCertSerno="
                + (customCertSerno == null ? "" : customCertSerno.toString(16)));
        log.info("Creating CRMF request with: IncludePopo=" + includePopo);
    }

    final KeyPair keys = KeyTools.genKeys("1024", AlgorithmConstants.KEYALGORITHM_RSA);
    final byte[] nonce = CmpClientMessageHelper.getInstance().createSenderNonce();
    final byte[] transid = CmpClientMessageHelper.getInstance().createSenderNonce();

    // We should be able to back date the start time when allow validity
    // override is enabled in the certificate profile
    Calendar cal = Calendar.getInstance();
    cal.add(Calendar.DAY_OF_WEEK, -1);
    cal.set(Calendar.MILLISECOND, 0); // Certificates don't use milliseconds
    // in validity
    Date notBefore = cal.getTime();
    cal.add(Calendar.DAY_OF_WEEK, 3);
    cal.set(Calendar.MILLISECOND, 0); // Certificates don't use milliseconds
    org.bouncycastle.asn1.x509.Time nb = new org.bouncycastle.asn1.x509.Time(notBefore);
    // in validity
    Date notAfter = cal.getTime();
    org.bouncycastle.asn1.x509.Time na = new org.bouncycastle.asn1.x509.Time(notAfter);

    ASN1EncodableVector optionalValidityV = new ASN1EncodableVector();
    optionalValidityV.add(new DERTaggedObject(true, 0, nb));
    optionalValidityV.add(new DERTaggedObject(true, 1, na));
    OptionalValidity myOptionalValidity = OptionalValidity.getInstance(new DERSequence(optionalValidityV));

    CertTemplateBuilder myCertTemplate = new CertTemplateBuilder();
    myCertTemplate.setValidity(myOptionalValidity);
    if (issuerDN != null) {
        myCertTemplate.setIssuer(issuerDN);
    }
    myCertTemplate.setSubject(userDN);
    byte[] bytes = keys.getPublic().getEncoded();
    ByteArrayInputStream bIn = new ByteArrayInputStream(bytes);
    ASN1InputStream dIn = new ASN1InputStream(bIn);
    SubjectPublicKeyInfo keyInfo = new SubjectPublicKeyInfo((ASN1Sequence) dIn.readObject());
    dIn.close();
    myCertTemplate.setPublicKey(keyInfo);

    // Create standard extensions
    ByteArrayOutputStream bOut = new ByteArrayOutputStream();
    ASN1OutputStream dOut = new ASN1OutputStream(bOut);
    ExtensionsGenerator extgen = new ExtensionsGenerator();
    if (altNames != null) {
        GeneralNames san = CertTools.getGeneralNamesFromAltName(altNames);
        dOut.writeObject(san);
        byte[] value = bOut.toByteArray();
        extgen.addExtension(Extension.subjectAlternativeName, false, value);
    }

    // KeyUsage
    int bcku = 0;
    bcku = KeyUsage.digitalSignature | KeyUsage.keyEncipherment | KeyUsage.nonRepudiation;
    KeyUsage ku = new KeyUsage(bcku);
    extgen.addExtension(Extension.keyUsage, false, new DERBitString(ku));

    // Make the complete extension package
    Extensions exts = extgen.generate();

    myCertTemplate.setExtensions(exts);
    if (customCertSerno != null) {
        // Add serialNumber to the certTemplate, it is defined as a MUST NOT be used in RFC4211, but we will use it anyway in order
        // to request a custom certificate serial number (something not standard anyway)
        myCertTemplate.setSerialNumber(new ASN1Integer(customCertSerno));
    }

    CertRequest myCertRequest = new CertRequest(4, myCertTemplate.build(), null);

    // POPO
    /*
     * PKMACValue myPKMACValue = new PKMACValue( new AlgorithmIdentifier(new
     * ASN1ObjectIdentifier("8.2.1.2.3.4"), new DERBitString(new byte[] { 8,
     * 1, 1, 2 })), new DERBitString(new byte[] { 12, 29, 37, 43 }));
     * 
     * POPOPrivKey myPOPOPrivKey = new POPOPrivKey(new DERBitString(new
     * byte[] { 44 }), 2); //take choice pos tag 2
     * 
     * POPOSigningKeyInput myPOPOSigningKeyInput = new POPOSigningKeyInput(
     * myPKMACValue, new SubjectPublicKeyInfo( new AlgorithmIdentifier(new
     * ASN1ObjectIdentifier("9.3.3.9.2.2"), new DERBitString(new byte[] { 2,
     * 9, 7, 3 })), new byte[] { 7, 7, 7, 4, 5, 6, 7, 7, 7 }));
     */
    ProofOfPossession myProofOfPossession = null;
    if (includePopo) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DEROutputStream mout = new DEROutputStream(baos);
        mout.writeObject(myCertRequest);
        mout.close();
        byte[] popoProtectionBytes = baos.toByteArray();
        String sigalg = AlgorithmTools.getSignAlgOidFromDigestAndKey(null, keys.getPrivate().getAlgorithm())
                .getId();
        Signature sig = Signature.getInstance(sigalg, "BC");
        sig.initSign(keys.getPrivate());
        sig.update(popoProtectionBytes);
        DERBitString bs = new DERBitString(sig.sign());
        POPOSigningKey myPOPOSigningKey = new POPOSigningKey(null,
                new AlgorithmIdentifier(new ASN1ObjectIdentifier(sigalg)), bs);
        myProofOfPossession = new ProofOfPossession(myPOPOSigningKey);
    } else {
        // raVerified POPO (meaning there is no POPO)
        myProofOfPossession = new ProofOfPossession();
    }

    AttributeTypeAndValue av = new AttributeTypeAndValue(CRMFObjectIdentifiers.id_regCtrl_regToken,
            new DERUTF8String(endentityPassword));
    AttributeTypeAndValue[] avs = { av };

    CertReqMsg myCertReqMsg = new CertReqMsg(myCertRequest, myProofOfPossession, avs);

    CertReqMessages myCertReqMessages = new CertReqMessages(myCertReqMsg);

    PKIHeaderBuilder myPKIHeader = new PKIHeaderBuilder(2, new GeneralName(userDN), new GeneralName(issuerDN));

    myPKIHeader.setMessageTime(new ASN1GeneralizedTime(new Date()));
    // senderNonce
    myPKIHeader.setSenderNonce(new DEROctetString(nonce));
    // TransactionId
    myPKIHeader.setTransactionID(new DEROctetString(transid));
    myPKIHeader.setProtectionAlg(null);
    myPKIHeader.setSenderKID(new byte[0]);

    PKIBody myPKIBody = new PKIBody(0, myCertReqMessages); // initialization
    // request
    PKIMessage myPKIMessage = new PKIMessage(myPKIHeader.build(), myPKIBody);

    return myPKIMessage;
}

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From source file:org.ejbca.ui.cmpclient.commands.KeyUpdateRequestCommand.java

License:Open Source License

@Override
public PKIMessage generatePKIMessage(ParameterContainer parameters) throws Exception {
    boolean verbose = parameters.containsKey(VERBOSE_KEY);

    final X500Name userDN = new X500Name(parameters.get(SUBJECTDN_KEY));
    final X500Name issuerDN = new X500Name(parameters.get(ISSUERDN_KEY));
    boolean includePopo = parameters.containsKey(INCLUDE_POPO_KEY);

    if (verbose) {
        log.info("Creating KeyUpdate request with: SubjectDN=" + userDN.toString());
        log.info("Creating KeyUpdate request with: IssuerDN=" + issuerDN.toString());
        log.info("Creating KeyUpdate request with: IncludePopo=" + includePopo);
    }// ww w .ja  v  a  2s  .c  o m

    byte[] nonce = CmpClientMessageHelper.getInstance().createSenderNonce();
    byte[] transid = CmpClientMessageHelper.getInstance().createSenderNonce();
    KeyPair keys = KeyTools.genKeys("1024", AlgorithmConstants.KEYALGORITHM_RSA);

    CertTemplateBuilder myCertTemplate = new CertTemplateBuilder();

    ASN1EncodableVector optionalValidityV = new ASN1EncodableVector();
    org.bouncycastle.asn1.x509.Time nb = new org.bouncycastle.asn1.x509.Time(
            new DERGeneralizedTime("20030211002120Z"));
    org.bouncycastle.asn1.x509.Time na = new org.bouncycastle.asn1.x509.Time(new Date());
    optionalValidityV.add(new DERTaggedObject(true, 0, nb));
    optionalValidityV.add(new DERTaggedObject(true, 1, na));
    OptionalValidity myOptionalValidity = OptionalValidity.getInstance(new DERSequence(optionalValidityV));

    myCertTemplate.setValidity(myOptionalValidity);

    byte[] bytes = keys.getPublic().getEncoded();
    ByteArrayInputStream bIn = new ByteArrayInputStream(bytes);
    ASN1InputStream dIn = new ASN1InputStream(bIn);
    try {
        SubjectPublicKeyInfo keyInfo = new SubjectPublicKeyInfo((ASN1Sequence) dIn.readObject());
        myCertTemplate.setPublicKey(keyInfo);
    } finally {
        dIn.close();
    }

    myCertTemplate.setSubject(userDN);

    CertRequest myCertRequest = new CertRequest(4, myCertTemplate.build(), null);

    // POPO
    /*
     * PKMACValue myPKMACValue = new PKMACValue( new AlgorithmIdentifier(new
     * ASN1ObjectIdentifier("8.2.1.2.3.4"), new DERBitString(new byte[] { 8,
     * 1, 1, 2 })), new DERBitString(new byte[] { 12, 29, 37, 43 }));
     * 
     * POPOPrivKey myPOPOPrivKey = new POPOPrivKey(new DERBitString(new
     * byte[] { 44 }), 2); //take choice pos tag 2
     * 
     * POPOSigningKeyInput myPOPOSigningKeyInput = new POPOSigningKeyInput(
     * myPKMACValue, new SubjectPublicKeyInfo( new AlgorithmIdentifier(new
     * ASN1ObjectIdentifier("9.3.3.9.2.2"), new DERBitString(new byte[] { 2,
     * 9, 7, 3 })), new byte[] { 7, 7, 7, 4, 5, 6, 7, 7, 7 }));
     */
    ProofOfPossession myProofOfPossession = null;
    if (includePopo) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DEROutputStream mout = new DEROutputStream(baos);
        mout.writeObject(myCertRequest);
        mout.close();
        byte[] popoProtectionBytes = baos.toByteArray();
        String sigalg = AlgorithmTools.getSignAlgOidFromDigestAndKey(null, keys.getPrivate().getAlgorithm())
                .getId();
        Signature sig = Signature.getInstance(sigalg);
        sig.initSign(keys.getPrivate());
        sig.update(popoProtectionBytes);

        DERBitString bs = new DERBitString(sig.sign());

        POPOSigningKey myPOPOSigningKey = new POPOSigningKey(null,
                new AlgorithmIdentifier(new ASN1ObjectIdentifier(sigalg)), bs);
        myProofOfPossession = new ProofOfPossession(myPOPOSigningKey);
    } else {
        // raVerified POPO (meaning there is no POPO)
        myProofOfPossession = new ProofOfPossession();
    }

    // myCertReqMsg.addRegInfo(new AttributeTypeAndValue(new
    // ASN1ObjectIdentifier("1.3.6.2.2.2.2.3.1"), new
    // DERInteger(1122334455)));
    AttributeTypeAndValue av = new AttributeTypeAndValue(CRMFObjectIdentifiers.id_regCtrl_regToken,
            new DERUTF8String(""));
    AttributeTypeAndValue[] avs = { av };

    CertReqMsg myCertReqMsg = new CertReqMsg(myCertRequest, myProofOfPossession, avs);

    CertReqMessages myCertReqMessages = new CertReqMessages(myCertReqMsg);

    PKIHeaderBuilder myPKIHeader = new PKIHeaderBuilder(2, new GeneralName(userDN), new GeneralName(issuerDN));
    myPKIHeader.setMessageTime(new ASN1GeneralizedTime(new Date()));
    // senderNonce
    myPKIHeader.setSenderNonce(new DEROctetString(nonce));
    // TransactionId
    myPKIHeader.setTransactionID(new DEROctetString(transid));
    myPKIHeader.setProtectionAlg(null);

    PKIBody myPKIBody = new PKIBody(PKIBody.TYPE_KEY_UPDATE_REQ, myCertReqMessages); // Key Update Request
    PKIMessage myPKIMessage = new PKIMessage(myPKIHeader.build(), myPKIBody);

    return myPKIMessage;
}

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