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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.xml.security.keys;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.crypto.SecretKey;
import org.apache.xml.security.encryption.EncryptedKey;
import org.apache.xml.security.encryption.XMLCipher;
import org.apache.xml.security.encryption.XMLEncryptionException;
import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.keys.content.DEREncodedKeyValue;
import org.apache.xml.security.keys.content.KeyInfoReference;
import org.apache.xml.security.keys.content.KeyName;
import org.apache.xml.security.keys.content.KeyValue;
import org.apache.xml.security.keys.content.MgmtData;
import org.apache.xml.security.keys.content.PGPData;
import org.apache.xml.security.keys.content.RetrievalMethod;
import org.apache.xml.security.keys.content.SPKIData;
import org.apache.xml.security.keys.content.X509Data;
import org.apache.xml.security.keys.content.keyvalues.DSAKeyValue;
import org.apache.xml.security.keys.content.keyvalues.RSAKeyValue;
import org.apache.xml.security.keys.keyresolver.KeyResolver;
import org.apache.xml.security.keys.keyresolver.KeyResolverException;
import org.apache.xml.security.keys.keyresolver.KeyResolverSpi;
import org.apache.xml.security.keys.storage.StorageResolver;
import org.apache.xml.security.transforms.Transforms;
import org.apache.xml.security.utils.Constants;
import org.apache.xml.security.utils.ElementProxy;
import org.apache.xml.security.utils.EncryptionConstants;
import org.apache.xml.security.utils.SignatureElementProxy;
import org.apache.xml.security.utils.XMLUtils;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* This class stand for KeyInfo Element that may contain keys, names,
* certificates and other public key management information,
* such as in-band key distribution or key agreement data.
*
* KeyInfo Element has two basic functions:
* One is KeyResolve for getting the public key in signature validation processing.
* the other one is toElement for getting the element in signature generation processing.
*
* The lengthXXX() methods provide access to the internal Key
* objects:
*
*
If the KeyInfo was constructed from an Element
* (Signature verification), the lengthXXX() methods searches
* for child elements of ds:KeyInfo for known types.
*
If the KeyInfo was constructed from scratch (during
* Signature generation), the lengthXXX() methods return the number
* of XXXs objects already passed to the KeyInfo
*
*
* The addXXX() methods are used for adding Objects of the
* appropriate type to the KeyInfo. This is used during signature
* generation.
*
* The itemXXX(int i) methods return the i'th object of the
* corresponding type.
*
* The containsXXX() methods return whether the KeyInfo
* contains the corresponding type.
*
*/
public class KeyInfo extends SignatureElementProxy {
private static org.slf4j.Logger log =
org.slf4j.LoggerFactory.getLogger(KeyInfo.class);
// We need at least one StorageResolver otherwise
// the KeyResolvers would not be called.
// The default StorageResolver is null.
private List x509Datas = null;
private List encryptedKeys = null;
private static final List nullList;
static {
List list = new ArrayList(1);
list.add(null);
nullList = java.util.Collections.unmodifiableList(list);
}
/** Field storageResolvers */
private List storageResolvers = nullList;
/**
* Stores the individual (per-KeyInfo) {@link KeyResolverSpi}s
*/
private List internalKeyResolvers = new ArrayList();
private boolean secureValidation;
/**
* Constructor KeyInfo
* @param doc
*/
public KeyInfo(Document doc) {
super(doc);
addReturnToSelf();
String prefix = ElementProxy.getDefaultPrefix(this.getBaseNamespace());
if (prefix != null && prefix.length() > 0) {
getElement().setAttributeNS(Constants.NamespaceSpecNS, "xmlns:" + prefix,
this.getBaseNamespace());
}
}
/**
* Constructor KeyInfo
*
* @param element
* @param baseURI
* @throws XMLSecurityException
*/
public KeyInfo(Element element, String baseURI) throws XMLSecurityException {
super(element, baseURI);
Attr attr = element.getAttributeNodeNS(null, "Id");
if (attr != null) {
element.setIdAttributeNode(attr, true);
}
}
/**
* Set whether secure processing is enabled or not. The default is false.
*/
public void setSecureValidation(boolean secureValidation) {
this.secureValidation = secureValidation;
}
/**
* Sets the Id attribute
*
* @param id ID
*/
public void setId(String id) {
if (id != null) {
setLocalIdAttribute(Constants._ATT_ID, id);
}
}
/**
* Returns the Id attribute
*
* @return the Id attribute
*/
public String getId() {
return getLocalAttribute(Constants._ATT_ID);
}
/**
* Method addKeyName
*
* @param keynameString
*/
public void addKeyName(String keynameString) {
this.add(new KeyName(getDocument(), keynameString));
}
/**
* Method add
*
* @param keyname
*/
public void add(KeyName keyname) {
appendSelf(keyname);
addReturnToSelf();
}
/**
* Method addKeyValue
*
* @param pk
*/
public void addKeyValue(PublicKey pk) {
this.add(new KeyValue(getDocument(), pk));
}
/**
* Method addKeyValue
*
* @param unknownKeyValueElement
*/
public void addKeyValue(Element unknownKeyValueElement) {
this.add(new KeyValue(getDocument(), unknownKeyValueElement));
}
/**
* Method add
*
* @param dsakeyvalue
*/
public void add(DSAKeyValue dsakeyvalue) {
this.add(new KeyValue(getDocument(), dsakeyvalue));
}
/**
* Method add
*
* @param rsakeyvalue
*/
public void add(RSAKeyValue rsakeyvalue) {
this.add(new KeyValue(getDocument(), rsakeyvalue));
}
/**
* Method add
*
* @param pk
*/
public void add(PublicKey pk) {
this.add(new KeyValue(getDocument(), pk));
}
/**
* Method add
*
* @param keyvalue
*/
public void add(KeyValue keyvalue) {
appendSelf(keyvalue);
addReturnToSelf();
}
/**
* Method addMgmtData
*
* @param mgmtdata
*/
public void addMgmtData(String mgmtdata) {
this.add(new MgmtData(getDocument(), mgmtdata));
}
/**
* Method add
*
* @param mgmtdata
*/
public void add(MgmtData mgmtdata) {
appendSelf(mgmtdata);
addReturnToSelf();
}
/**
* Method addPGPData
*
* @param pgpdata
*/
public void add(PGPData pgpdata) {
appendSelf(pgpdata);
addReturnToSelf();
}
/**
* Method addRetrievalMethod
*
* @param uri
* @param transforms
* @param Type
*/
public void addRetrievalMethod(String uri, Transforms transforms, String Type) {
this.add(new RetrievalMethod(getDocument(), uri, transforms, Type));
}
/**
* Method add
*
* @param retrievalmethod
*/
public void add(RetrievalMethod retrievalmethod) {
appendSelf(retrievalmethod);
addReturnToSelf();
}
/**
* Method add
*
* @param spkidata
*/
public void add(SPKIData spkidata) {
appendSelf(spkidata);
addReturnToSelf();
}
/**
* Method addX509Data
*
* @param x509data
*/
public void add(X509Data x509data) {
if (x509Datas == null) {
x509Datas = new ArrayList();
}
x509Datas.add(x509data);
appendSelf(x509data);
addReturnToSelf();
}
/**
* Method addEncryptedKey
*
* @param encryptedKey
* @throws XMLEncryptionException
*/
public void add(EncryptedKey encryptedKey) throws XMLEncryptionException {
if (encryptedKeys == null) {
encryptedKeys = new ArrayList();
}
encryptedKeys.add(encryptedKey);
XMLCipher cipher = XMLCipher.getInstance();
appendSelf(cipher.martial(encryptedKey));
}
/**
* Method addDEREncodedKeyValue
*
* @param pk
* @throws XMLSecurityException
*/
public void addDEREncodedKeyValue(PublicKey pk) throws XMLSecurityException {
this.add(new DEREncodedKeyValue(getDocument(), pk));
}
/**
* Method add
*
* @param derEncodedKeyValue
*/
public void add(DEREncodedKeyValue derEncodedKeyValue) {
appendSelf(derEncodedKeyValue);
addReturnToSelf();
}
/**
* Method addKeyInfoReference
*
* @param URI
* @throws XMLSecurityException
*/
public void addKeyInfoReference(String URI) throws XMLSecurityException {
this.add(new KeyInfoReference(getDocument(), URI));
}
/**
* Method add
*
* @param keyInfoReference
*/
public void add(KeyInfoReference keyInfoReference) {
appendSelf(keyInfoReference);
addReturnToSelf();
}
/**
* Method addUnknownElement
*
* @param element
*/
public void addUnknownElement(Element element) {
appendSelf(element);
addReturnToSelf();
}
/**
* Method lengthKeyName
*
* @return the number of the KeyName tags
*/
public int lengthKeyName() {
return this.length(Constants.SignatureSpecNS, Constants._TAG_KEYNAME);
}
/**
* Method lengthKeyValue
*
*@return the number of the KeyValue tags
*/
public int lengthKeyValue() {
return this.length(Constants.SignatureSpecNS, Constants._TAG_KEYVALUE);
}
/**
* Method lengthMgmtData
*
*@return the number of the MgmtData tags
*/
public int lengthMgmtData() {
return this.length(Constants.SignatureSpecNS, Constants._TAG_MGMTDATA);
}
/**
* Method lengthPGPData
*
*@return the number of the PGPDat. tags
*/
public int lengthPGPData() {
return this.length(Constants.SignatureSpecNS, Constants._TAG_PGPDATA);
}
/**
* Method lengthRetrievalMethod
*
*@return the number of the RetrievalMethod tags
*/
public int lengthRetrievalMethod() {
return this.length(Constants.SignatureSpecNS, Constants._TAG_RETRIEVALMETHOD);
}
/**
* Method lengthSPKIData
*
*@return the number of the SPKIData tags
*/
public int lengthSPKIData() {
return this.length(Constants.SignatureSpecNS, Constants._TAG_SPKIDATA);
}
/**
* Method lengthX509Data
*
*@return the number of the X509Data tags
*/
public int lengthX509Data() {
if (x509Datas != null) {
return x509Datas.size();
}
return this.length(Constants.SignatureSpecNS, Constants._TAG_X509DATA);
}
/**
* Method lengthDEREncodedKeyValue
*
*@return the number of the DEREncodedKeyValue tags
*/
public int lengthDEREncodedKeyValue() {
return this.length(Constants.SignatureSpec11NS, Constants._TAG_DERENCODEDKEYVALUE);
}
/**
* Method lengthKeyInfoReference
*
*@return the number of the KeyInfoReference tags
*/
public int lengthKeyInfoReference() {
return this.length(Constants.SignatureSpec11NS, Constants._TAG_KEYINFOREFERENCE);
}
/**
* Method lengthUnknownElement
* NOTE possibly buggy.
* @return the number of the UnknownElement tags
*/
public int lengthUnknownElement() {
int res = 0;
Node childNode = getElement().getFirstChild();
while (childNode != null) {
/**
* $todo$ using this method, we don't see unknown Elements
* from Signature NS; revisit
*/
if (childNode.getNodeType() == Node.ELEMENT_NODE
&& childNode.getNamespaceURI().equals(Constants.SignatureSpecNS)) {
res++;
}
childNode = childNode.getNextSibling();
}
return res;
}
/**
* Method itemKeyName
*
* @param i
* @return the asked KeyName element, null if the index is too big
* @throws XMLSecurityException
*/
public KeyName itemKeyName(int i) throws XMLSecurityException {
Element e =
XMLUtils.selectDsNode(
getFirstChild(), Constants._TAG_KEYNAME, i);
if (e != null) {
return new KeyName(e, this.baseURI);
}
return null;
}
/**
* Method itemKeyValue
*
* @param i
* @return the asked KeyValue element, null if the index is too big
* @throws XMLSecurityException
*/
public KeyValue itemKeyValue(int i) throws XMLSecurityException {
Element e =
XMLUtils.selectDsNode(
getFirstChild(), Constants._TAG_KEYVALUE, i);
if (e != null) {
return new KeyValue(e, this.baseURI);
}
return null;
}
/**
* Method itemMgmtData
*
* @param i
* @return the asked MgmtData element, null if the index is too big
* @throws XMLSecurityException
*/
public MgmtData itemMgmtData(int i) throws XMLSecurityException {
Element e =
XMLUtils.selectDsNode(
getFirstChild(), Constants._TAG_MGMTDATA, i);
if (e != null) {
return new MgmtData(e, this.baseURI);
}
return null;
}
/**
* Method itemPGPData
*
* @param i
* @return the asked PGPData element, null if the index is too big
* @throws XMLSecurityException
*/
public PGPData itemPGPData(int i) throws XMLSecurityException {
Element e =
XMLUtils.selectDsNode(
getFirstChild(), Constants._TAG_PGPDATA, i);
if (e != null) {
return new PGPData(e, this.baseURI);
}
return null;
}
/**
* Method itemRetrievalMethod
*
* @param i
*@return the asked RetrievalMethod element, null if the index is too big
* @throws XMLSecurityException
*/
public RetrievalMethod itemRetrievalMethod(int i) throws XMLSecurityException {
Element e =
XMLUtils.selectDsNode(
getFirstChild(), Constants._TAG_RETRIEVALMETHOD, i);
if (e != null) {
return new RetrievalMethod(e, this.baseURI);
}
return null;
}
/**
* Method itemSPKIData
*
* @param i
* @return the asked SPKIData element, null if the index is too big
* @throws XMLSecurityException
*/
public SPKIData itemSPKIData(int i) throws XMLSecurityException {
Element e =
XMLUtils.selectDsNode(
getFirstChild(), Constants._TAG_SPKIDATA, i);
if (e != null) {
return new SPKIData(e, this.baseURI);
}
return null;
}
/**
* Method itemX509Data
*
* @param i
* @return the asked X509Data element, null if the index is too big
* @throws XMLSecurityException
*/
public X509Data itemX509Data(int i) throws XMLSecurityException {
if (x509Datas != null) {
return x509Datas.get(i);
}
Element e =
XMLUtils.selectDsNode(
getFirstChild(), Constants._TAG_X509DATA, i);
if (e != null) {
return new X509Data(e, this.baseURI);
}
return null;
}
/**
* 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(
getFirstChild(), EncryptionConstants._TAG_ENCRYPTEDKEY, i);
if (e != null) {
XMLCipher cipher = XMLCipher.getInstance();
cipher.init(XMLCipher.UNWRAP_MODE, null);
return cipher.loadEncryptedKey(e);
}
return null;
}
/**
* Method itemDEREncodedKeyValue
*
* @param i
* @return the asked DEREncodedKeyValue element, null if the index is too big
* @throws XMLSecurityException
*/
public DEREncodedKeyValue itemDEREncodedKeyValue(int i) throws XMLSecurityException {
Element e =
XMLUtils.selectDs11Node(
getFirstChild(), Constants._TAG_DERENCODEDKEYVALUE, i);
if (e != null) {
return new DEREncodedKeyValue(e, this.baseURI);
}
return null;
}
/**
* Method itemKeyInfoReference
*
* @param i
* @return the asked KeyInfoReference element, null if the index is too big
* @throws XMLSecurityException
*/
public KeyInfoReference itemKeyInfoReference(int i) throws XMLSecurityException {
Element e =
XMLUtils.selectDs11Node(
getFirstChild(), Constants._TAG_KEYINFOREFERENCE, i);
if (e != null) {
return new KeyInfoReference(e, this.baseURI);
}
return null;
}
/**
* Method itemUnknownElement
*
* @param i index
* @return the element number of the unknown elements
*/
public Element itemUnknownElement(int i) {
int res = 0;
Node childNode = getElement().getFirstChild();
while (childNode != null) {
/**
* $todo$ using this method, we don't see unknown Elements
* from Signature NS; revisit
*/
if (childNode.getNodeType() == Node.ELEMENT_NODE
&& childNode.getNamespaceURI().equals(Constants.SignatureSpecNS)) {
res++;
if (res == i) {
return (Element) childNode;
}
}
childNode = childNode.getNextSibling();
}
return null;
}
/**
* Method isEmpty
*
* @return true if the element has no descendants.
*/
public boolean isEmpty() {
return getFirstChild() == null;
}
/**
* Method containsKeyName
*
* @return If the KeyInfo contains a KeyName node
*/
public boolean containsKeyName() {
return this.lengthKeyName() > 0;
}
/**
* Method containsKeyValue
*
* @return If the KeyInfo contains a KeyValue node
*/
public boolean containsKeyValue() {
return this.lengthKeyValue() > 0;
}
/**
* Method containsMgmtData
*
* @return If the KeyInfo contains a MgmtData node
*/
public boolean containsMgmtData() {
return this.lengthMgmtData() > 0;
}
/**
* Method containsPGPData
*
* @return If the KeyInfo contains a PGPData node
*/
public boolean containsPGPData() {
return this.lengthPGPData() > 0;
}
/**
* Method containsRetrievalMethod
*
* @return If the KeyInfo contains a RetrievalMethod node
*/
public boolean containsRetrievalMethod() {
return this.lengthRetrievalMethod() > 0;
}
/**
* Method containsSPKIData
*
* @return If the KeyInfo contains a SPKIData node
*/
public boolean containsSPKIData() {
return this.lengthSPKIData() > 0;
}
/**
* Method containsUnknownElement
*
* @return If the KeyInfo contains a UnknownElement node
*/
public boolean containsUnknownElement() {
return this.lengthUnknownElement() > 0;
}
/**
* Method containsX509Data
*
* @return If the KeyInfo contains a X509Data node
*/
public boolean containsX509Data() {
return this.lengthX509Data() > 0;
}
/**
* Method containsDEREncodedKeyValue
*
* @return If the KeyInfo contains a DEREncodedKeyValue node
*/
public boolean containsDEREncodedKeyValue() {
return this.lengthDEREncodedKeyValue() > 0;
}
/**
* Method containsKeyInfoReference
*
* @return If the KeyInfo contains a KeyInfoReference node
*/
public boolean containsKeyInfoReference() {
return this.lengthKeyInfoReference() > 0;
}
/**
* This method returns the public key.
*
* @return If the KeyInfo contains a PublicKey node
* @throws KeyResolverException
*/
public PublicKey getPublicKey() throws KeyResolverException {
PublicKey pk = this.getPublicKeyFromInternalResolvers();
if (pk != null) {
if (log.isDebugEnabled()) {
log.debug("I could find a key using the per-KeyInfo key resolvers");
}
return pk;
}
if (log.isDebugEnabled()) {
log.debug("I couldn't find a key using the per-KeyInfo key resolvers");
}
pk = this.getPublicKeyFromStaticResolvers();
if (pk != null) {
if (log.isDebugEnabled()) {
log.debug("I could find a key using the system-wide key resolvers");
}
return pk;
}
if (log.isDebugEnabled()) {
log.debug("I couldn't find a key using the system-wide key resolvers");
}
return null;
}
/**
* Searches the library wide KeyResolvers for public keys
*
* @return The public key contained in this Node.
* @throws KeyResolverException
*/
PublicKey getPublicKeyFromStaticResolvers() throws KeyResolverException {
Iterator it = KeyResolver.iterator();
while (it.hasNext()) {
KeyResolverSpi keyResolver = it.next();
keyResolver.setSecureValidation(secureValidation);
Node currentChild = getFirstChild();
String uri = this.getBaseURI();
while (currentChild != null) {
if (currentChild.getNodeType() == Node.ELEMENT_NODE) {
for (StorageResolver storage : storageResolvers) {
PublicKey pk =
keyResolver.engineLookupAndResolvePublicKey(
(Element) currentChild, uri, storage
);
if (pk != null) {
return pk;
}
}
}
currentChild = currentChild.getNextSibling();
}
}
return null;
}
/**
* Searches the per-KeyInfo KeyResolvers for public keys
*
* @return The public key contained in this Node.
* @throws KeyResolverException
*/
PublicKey getPublicKeyFromInternalResolvers() throws KeyResolverException {
for (KeyResolverSpi keyResolver : internalKeyResolvers) {
if (log.isDebugEnabled()) {
log.debug("Try " + keyResolver.getClass().getName());
}
keyResolver.setSecureValidation(secureValidation);
Node currentChild = getFirstChild();
String uri = this.getBaseURI();
while (currentChild != null) {
if (currentChild.getNodeType() == Node.ELEMENT_NODE) {
for (StorageResolver storage : storageResolvers) {
PublicKey pk =
keyResolver.engineLookupAndResolvePublicKey(
(Element) currentChild, uri, storage
);
if (pk != null) {
return pk;
}
}
}
currentChild = currentChild.getNextSibling();
}
}
return null;
}
/**
* Method getX509Certificate
*
* @return The certificate contained in this KeyInfo
* @throws KeyResolverException
*/
public X509Certificate getX509Certificate() throws KeyResolverException {
// First search using the individual resolvers from the user
X509Certificate cert = this.getX509CertificateFromInternalResolvers();
if (cert != null) {
if (log.isDebugEnabled()) {
log.debug("I could find a X509Certificate using the per-KeyInfo key resolvers");
}
return cert;
}
if (log.isDebugEnabled()) {
log.debug("I couldn't find a X509Certificate using the per-KeyInfo key resolvers");
}
// Then use the system-wide Resolvers
cert = this.getX509CertificateFromStaticResolvers();
if (cert != null) {
if (log.isDebugEnabled()) {
log.debug("I could find a X509Certificate using the system-wide key resolvers");
}
return cert;
}
if (log.isDebugEnabled()) {
log.debug("I couldn't find a X509Certificate using the system-wide key resolvers");
}
return null;
}
/**
* This method uses each System-wide {@link KeyResolver} to search the
* child elements. Each combination of {@link KeyResolver} and child element
* is checked against all {@link StorageResolver}s.
*
* @return The certificate contained in this KeyInfo
* @throws KeyResolverException
*/
X509Certificate getX509CertificateFromStaticResolvers()
throws KeyResolverException {
if (log.isDebugEnabled()) {
log.debug(
"Start getX509CertificateFromStaticResolvers() with " + KeyResolver.length()
+ " resolvers"
);
}
String uri = this.getBaseURI();
Iterator it = KeyResolver.iterator();
while (it.hasNext()) {
KeyResolverSpi keyResolver = it.next();
keyResolver.setSecureValidation(secureValidation);
X509Certificate cert = applyCurrentResolver(uri, keyResolver);
if (cert != null) {
return cert;
}
}
return null;
}
private X509Certificate applyCurrentResolver(
String uri, KeyResolverSpi keyResolver
) throws KeyResolverException {
Node currentChild = getFirstChild();
while (currentChild != null) {
if (currentChild.getNodeType() == Node.ELEMENT_NODE) {
for (StorageResolver storage : storageResolvers) {
X509Certificate cert =
keyResolver.engineLookupResolveX509Certificate(
(Element) currentChild, uri, storage
);
if (cert != null) {
return cert;
}
}
}
currentChild = currentChild.getNextSibling();
}
return null;
}
/**
* Method getX509CertificateFromInternalResolvers
*
* @return The certificate contained in this KeyInfo
* @throws KeyResolverException
*/
X509Certificate getX509CertificateFromInternalResolvers()
throws KeyResolverException {
if (log.isDebugEnabled()) {
log.debug(
"Start getX509CertificateFromInternalResolvers() with "
+ this.lengthInternalKeyResolver() + " resolvers"
);
}
String uri = this.getBaseURI();
for (KeyResolverSpi keyResolver : internalKeyResolvers) {
if (log.isDebugEnabled()) {
log.debug("Try " + keyResolver.getClass().getName());
}
keyResolver.setSecureValidation(secureValidation);
X509Certificate cert = applyCurrentResolver(uri, keyResolver);
if (cert != null) {
return cert;
}
}
return null;
}
/**
* This method returns a secret (symmetric) key. This is for XML Encryption.
* @return the secret key contained in this KeyInfo
* @throws KeyResolverException
*/
public SecretKey getSecretKey() throws KeyResolverException {
SecretKey sk = this.getSecretKeyFromInternalResolvers();
if (sk != null) {
if (log.isDebugEnabled()) {
log.debug("I could find a secret key using the per-KeyInfo key resolvers");
}
return sk;
}
if (log.isDebugEnabled()) {
log.debug("I couldn't find a secret key using the per-KeyInfo key resolvers");
}
sk = this.getSecretKeyFromStaticResolvers();
if (sk != null) {
if (log.isDebugEnabled()) {
log.debug("I could find a secret key using the system-wide key resolvers");
}
return sk;
}
if (log.isDebugEnabled()) {
log.debug("I couldn't find a secret key using the system-wide key resolvers");
}
return null;
}
/**
* Searches the library wide KeyResolvers for Secret keys
*
* @return the secret key contained in this KeyInfo
* @throws KeyResolverException
*/
SecretKey getSecretKeyFromStaticResolvers() throws KeyResolverException {
Iterator it = KeyResolver.iterator();
while (it.hasNext()) {
KeyResolverSpi keyResolver = it.next();
keyResolver.setSecureValidation(secureValidation);
Node currentChild = getFirstChild();
String uri = this.getBaseURI();
while (currentChild != null) {
if (currentChild.getNodeType() == Node.ELEMENT_NODE) {
for (StorageResolver storage : storageResolvers) {
SecretKey sk =
keyResolver.engineLookupAndResolveSecretKey(
(Element) currentChild, uri, storage
);
if (sk != null) {
return sk;
}
}
}
currentChild = currentChild.getNextSibling();
}
}
return null;
}
/**
* Searches the per-KeyInfo KeyResolvers for secret keys
*
* @return the secret key contained in this KeyInfo
* @throws KeyResolverException
*/
SecretKey getSecretKeyFromInternalResolvers() throws KeyResolverException {
for (KeyResolverSpi keyResolver : internalKeyResolvers) {
if (log.isDebugEnabled()) {
log.debug("Try " + keyResolver.getClass().getName());
}
keyResolver.setSecureValidation(secureValidation);
Node currentChild = getFirstChild();
String uri = this.getBaseURI();
while (currentChild != null) {
if (currentChild.getNodeType() == Node.ELEMENT_NODE) {
for (StorageResolver storage : storageResolvers) {
SecretKey sk =
keyResolver.engineLookupAndResolveSecretKey(
(Element) currentChild, uri, storage
);
if (sk != null) {
return sk;
}
}
}
currentChild = currentChild.getNextSibling();
}
}
return null;
}
/**
* This method returns a private key. This is for Key Transport in XML Encryption.
* @return the private key contained in this KeyInfo
* @throws KeyResolverException
*/
public PrivateKey getPrivateKey() throws KeyResolverException {
PrivateKey pk = this.getPrivateKeyFromInternalResolvers();
if (pk != null) {
if (log.isDebugEnabled()) {
log.debug("I could find a private key using the per-KeyInfo key resolvers");
}
return pk;
}
if (log.isDebugEnabled()) {
log.debug("I couldn't find a secret key using the per-KeyInfo key resolvers");
}
pk = this.getPrivateKeyFromStaticResolvers();
if (pk != null) {
if (log.isDebugEnabled()) {
log.debug("I could find a private key using the system-wide key resolvers");
}
return pk;
}
if (log.isDebugEnabled()) {
log.debug("I couldn't find a private key using the system-wide key resolvers");
}
return null;
}
/**
* Searches the library wide KeyResolvers for Private keys
*
* @return the private key contained in this KeyInfo
* @throws KeyResolverException
*/
PrivateKey getPrivateKeyFromStaticResolvers() throws KeyResolverException {
Iterator it = KeyResolver.iterator();
while (it.hasNext()) {
KeyResolverSpi keyResolver = it.next();
keyResolver.setSecureValidation(secureValidation);
Node currentChild = getFirstChild();
String uri = this.getBaseURI();
while (currentChild != null) {
if (currentChild.getNodeType() == Node.ELEMENT_NODE) {
// not using StorageResolvers at the moment
// since they cannot return private keys
PrivateKey pk =
keyResolver.engineLookupAndResolvePrivateKey(
(Element) currentChild, uri, null
);
if (pk != null) {
return pk;
}
}
currentChild = currentChild.getNextSibling();
}
}
return null;
}
/**
* Searches the per-KeyInfo KeyResolvers for private keys
*
* @return the private key contained in this KeyInfo
* @throws KeyResolverException
*/
PrivateKey getPrivateKeyFromInternalResolvers() throws KeyResolverException {
for (KeyResolverSpi keyResolver : internalKeyResolvers) {
if (log.isDebugEnabled()) {
log.debug("Try " + keyResolver.getClass().getName());
}
keyResolver.setSecureValidation(secureValidation);
Node currentChild = getFirstChild();
String uri = this.getBaseURI();
while (currentChild != null) {
if (currentChild.getNodeType() == Node.ELEMENT_NODE) {
// not using StorageResolvers at the moment
// since they cannot return private keys
PrivateKey pk =
keyResolver.engineLookupAndResolvePrivateKey(
(Element) currentChild, uri, null
);
if (pk != null) {
return pk;
}
}
currentChild = currentChild.getNextSibling();
}
}
return null;
}
/**
* This method is used to add a custom {@link KeyResolverSpi} to a KeyInfo
* object.
*
* @param realKeyResolver
*/
public void registerInternalKeyResolver(KeyResolverSpi realKeyResolver) {
this.internalKeyResolvers.add(realKeyResolver);
}
/**
* Method lengthInternalKeyResolver
* @return the length of the key
*/
int lengthInternalKeyResolver() {
return this.internalKeyResolvers.size();
}
/**
* Method itemInternalKeyResolver
*
* @param i the index
* @return the KeyResolverSpi for the index.
*/
KeyResolverSpi itemInternalKeyResolver(int i) {
return this.internalKeyResolvers.get(i);
}
/**
* Method addStorageResolver
*
* @param storageResolver
*/
public void addStorageResolver(StorageResolver storageResolver) {
if (storageResolvers == nullList) {
// Replace the default null StorageResolver
storageResolvers = new ArrayList();
}
this.storageResolvers.add(storageResolver);
}
/** @inheritDoc */
public String getBaseLocalName() {
return Constants._TAG_KEYINFO;
}
}
