public void execute()

in ws-security-dom/src/main/java/org/apache/wss4j/dom/action/EncryptionDerivedAction.java [47:152]
88 lines of code
23 McCabe index (conditional complexity)

    public void execute(WSHandler handler, SecurityActionToken actionToken, RequestData reqData)
            throws WSSecurityException {
        CallbackHandler callbackHandler = reqData.getCallbackHandler();
        if (callbackHandler == null) {
            callbackHandler = handler.getPasswordCallbackHandler(reqData);
        }

        EncryptionActionToken encryptionToken = null;
        if (actionToken instanceof EncryptionActionToken) {
            encryptionToken = (EncryptionActionToken)actionToken;
        }
        if (encryptionToken == null) {
            encryptionToken = reqData.getEncryptionToken();
        }

        WSPasswordCallback passwordCallback =
            handler.getPasswordCB(encryptionToken.getUser(), WSConstants.DKT_ENCR, callbackHandler, reqData);
        WSSecDKEncrypt wsEncrypt = new WSSecDKEncrypt(reqData.getSecHeader());
        wsEncrypt.setIdAllocator(reqData.getWssConfig().getIdAllocator());
        wsEncrypt.setWsDocInfo(reqData.getWsDocInfo());
        wsEncrypt.setExpandXopInclude(reqData.isExpandXopInclude());

        if (encryptionToken.getKeyIdentifierId() != 0) {
            wsEncrypt.setKeyIdentifierType(encryptionToken.getKeyIdentifierId());
        }

        if (encryptionToken.getSymmetricAlgorithm() != null) {
            wsEncrypt.setSymmetricEncAlgorithm(encryptionToken.getSymmetricAlgorithm());
        }
        wsEncrypt.setUserInfo(encryptionToken.getUser(), passwordCallback.getPassword());

        if (reqData.isUse200512Namespace()) {
            wsEncrypt.setWscVersion(ConversationConstants.VERSION_05_12);
        } else {
            wsEncrypt.setWscVersion(ConversationConstants.VERSION_05_02);
        }

        if (encryptionToken.getDerivedKeyLength() > 0) {
            wsEncrypt.setDerivedKeyLength(encryptionToken.getDerivedKeyLength());
        }

        Document doc = reqData.getSecHeader().getSecurityHeaderElement().getOwnerDocument();
        String derivedKeyTokenReference = encryptionToken.getDerivedKeyTokenReference();
        Element tokenElement = null;
        SecretKey symmetricKey = null;
        if ("EncryptedKey".equals(derivedKeyTokenReference)) {
            if (reqData.getSignatureToken() == null || reqData.getSignatureToken().getKey() == null
                || reqData.getSignatureToken().getKeyIdentifier() == null) {
                String symmetricKeyAlgorithm = encryptionToken.getSymmetricAlgorithm();
                if (symmetricKeyAlgorithm == null) {
                    symmetricKeyAlgorithm = WSConstants.AES_128;
                }
                KeyGenerator keyGen = KeyUtils.getKeyGenerator(symmetricKeyAlgorithm);
                symmetricKey = keyGen.generateKey();
            }

            tokenElement = setupEncryptedKeyTokenReference(reqData, encryptionToken, wsEncrypt, symmetricKey);
        } else if ("SecurityContextToken".equals(derivedKeyTokenReference)) {
            tokenElement = setupSCTTokenReference(reqData, encryptionToken, wsEncrypt, passwordCallback, doc);
        }

        wsEncrypt.setAttachmentCallbackHandler(reqData.getAttachmentCallbackHandler());
        wsEncrypt.setStoreBytesInAttachment(reqData.isStoreBytesInAttachment());

        try {
            List<WSEncryptionPart> parts = encryptionToken.getParts();
            if (parts != null && !parts.isEmpty()) {
                wsEncrypt.getParts().addAll(parts);
            } else {
                wsEncrypt.getParts().add(WSSecurityUtil.getDefaultEncryptionPart(doc));
            }

            byte[] key = getKey(reqData.getSignatureToken(), passwordCallback, symmetricKey);
            wsEncrypt.prepare(key);

            Element externRefList = wsEncrypt.encrypt();

            // Put the DerivedKeyToken Element in the right place in the security header
            Node nextSibling = null;
            if (tokenElement == null
                && "EncryptedKey".equals(encryptionToken.getDerivedKeyTokenReference())) {
                nextSibling = findEncryptedKeySibling(reqData);
            } else if (tokenElement == null
                && "SecurityContextToken".equals(encryptionToken.getDerivedKeyTokenReference())) {
                nextSibling = findSCTSibling(reqData);
            }
            if (nextSibling == null) {
                wsEncrypt.prependDKElementToHeader();
            } else {
                reqData.getSecHeader().getSecurityHeaderElement().insertBefore(
                    wsEncrypt.getdktElement(), nextSibling);
            }

            // Add the ReferenceList to the security header
            wsEncrypt.addExternalRefElement(externRefList);

            if (tokenElement != null) {
                WSSecurityUtil.prependChildElement(reqData.getSecHeader().getSecurityHeaderElement(), tokenElement);
            }

            wsEncrypt.clean();
        } catch (WSSecurityException e) {
            throw new WSSecurityException(WSSecurityException.ErrorCode.FAILURE, e,
                                          "empty", new Object[] {"Error during Encryption: "});
        }
    }