import com.sun.org.apache.xml.internal.security.utils.EncryptionConstants; //导入依赖的package包/类
/**
 * Returns an <code>EncryptedData</code> interface. Use this operation if
 * you want to have full control over the contents of the
 * <code>EncryptedData</code> structure.
 *
 * This does not change the source document in any way.
 *
 * @param context the context <code>Document</code>.
 * @param element the <code>Element</code> that will be encrypted.
 * @param contentMode <code>true</code> to encrypt element's content only,
 *    <code>false</code> otherwise
 * @return the <code>EncryptedData</code>
 * @throws Exception
 */
public EncryptedData encryptData(
    Document context, Element element, boolean contentMode
) throws /* XMLEncryption */ Exception {
    if (log.isLoggable(java.util.logging.Level.FINE)) {
        log.log(java.util.logging.Level.FINE, "Encrypting element...");
    }
    if (null == context) {
        log.log(java.util.logging.Level.SEVERE, "Context document unexpectedly null...");
    }
    if (null == element) {
        log.log(java.util.logging.Level.SEVERE, "Element unexpectedly null...");
    }
    if (cipherMode != ENCRYPT_MODE && log.isLoggable(java.util.logging.Level.FINE)) {
        log.log(java.util.logging.Level.FINE, "XMLCipher unexpectedly not in ENCRYPT_MODE...");
    }

    if (contentMode) {
        return encryptData(context, element, EncryptionConstants.TYPE_CONTENT, null);
    } else {
        return encryptData(context, element, EncryptionConstants.TYPE_ELEMENT, null);
    }
}
 

import com.sun.org.apache.xml.internal.security.utils.EncryptionConstants; //导入依赖的package包/类
/**
 * @param element
 * @return a new EncryptionProperties
 */
EncryptionProperties newEncryptionProperties(Element element) {
    EncryptionProperties result = newEncryptionProperties();

    result.setId(element.getAttributeNS(null, EncryptionConstants._ATT_ID));

    NodeList encryptionPropertyList =
        element.getElementsByTagNameNS(
            EncryptionConstants.EncryptionSpecNS,
            EncryptionConstants._TAG_ENCRYPTIONPROPERTY);
    for (int i = 0; i < encryptionPropertyList.getLength(); i++) {
        Node n = encryptionPropertyList.item(i);
        if (null != n) {
            result.addEncryptionProperty(newEncryptionProperty((Element) n));
        }
    }

    return result;
}
 

import com.sun.org.apache.xml.internal.security.utils.EncryptionConstants; //导入依赖的package包/类
Element toElement() {
    Element result =
        XMLUtils.createElementInEncryptionSpace(
            contextDocument, EncryptionConstants._TAG_ENCRYPTIONPROPERTY
        );
    if (null != target) {
        result.setAttributeNS(null, EncryptionConstants._ATT_TARGET, target);
    }
    if (null != id) {
        result.setAttributeNS(null, EncryptionConstants._ATT_ID, id);
    }
    // TODO: figure out the anyAttribyte stuff...
    // TODO: figure out the any stuff...

    return result;
}
 

import com.sun.org.apache.xml.internal.security.utils.EncryptionConstants; //导入依赖的package包/类
/**
 * Method itemEncryptedKey
 *
 * @param i
 * @return the asked EncryptedKey element, null if the index is too big
 * @throws XMLSecurityException
 */
public EncryptedKey itemEncryptedKey(int i) throws XMLSecurityException {
    if (encryptedKeys != null) {
        return encryptedKeys.get(i);
    }
    Element e =
        XMLUtils.selectXencNode(
            this.constructionElement.getFirstChild(), EncryptionConstants._TAG_ENCRYPTEDKEY, i);

    if (e != null) {
        XMLCipher cipher = XMLCipher.getInstance();
        cipher.init(XMLCipher.UNWRAP_MODE, null);
        return cipher.loadEncryptedKey(e);
    }
    return null;
}