/**
* Get the version of the stored node key name
*
* @return the version
*/
public NDNTime nodeKeyVersion() {
try {
return VersioningProfile.getLastVersionAsTimestamp(storedNodeKeyName());
} catch (VersionMissingException e) {
if (Log.isLoggable(Log.FAC_ACCESSCONTROL, Level.WARNING)) {
Log.warning(
Log.FAC_ACCESSCONTROL,
"Unexpected: name that was confirmed to have a version on construction throws a VersionMissingException: "
+ storedNodeKeyName());
}
throw new IllegalStateException(
"Unexpected: name that was confirmed to have a version on construction throws a VersionMissingException: "
+ storedNodeKeyName());
}
}
/**
* Computes the descendant node key for a specified descendant node using the key derivation
* function.
*
* @param descendantNodeName the name of the descendant node
* @param keyLabel the label of the key
* @return the node key
* @throws InvalidKeyException
* @throws ContentEncodingException
*/
public NodeKey computeDescendantNodeKey(ContentName descendantNodeName, String keyLabel)
throws InvalidKeyException, ContentEncodingException {
if (nodeName().equals(descendantNodeName)) {
if (Log.isLoggable(Log.FAC_ACCESSCONTROL, Level.INFO)) {
Log.info(
Log.FAC_ACCESSCONTROL,
"Asked to compute ourselves as our own descendant (node key "
+ nodeName()
+ "), returning this.");
}
return this;
}
if (!nodeName().isPrefixOf(descendantNodeName)) {
throw new IllegalArgumentException(
"Node " + descendantNodeName + " is not a child of this node " + nodeName());
}
byte[] derivedKey =
KeyDerivationFunction.DeriveKeyForNode(
nodeName(), nodeKey().getEncoded(), keyLabel, descendantNodeName);
return new NodeKey(descendantNodeName, derivedKey, storedNodeKeyName(), storedNodeKeyID());
}
/**
* Read policy from persistent storage under standard naming convention. This method may be called
* optionally during initialization by a subclass after it is initialized enough to process
* getContent() calls
*
* @param globalPrefix - used to find our policy file
* @return XML for the current policy or null if no current policy
* @throws MalformedContentNameStringException
* @throws IOException
*/
public PolicyXML readPolicy(ContentName globalPrefix)
throws MalformedContentNameStringException, IOException {
if (Log.isLoggable(Log.FAC_REPO, Level.INFO))
Log.info(
Log.FAC_REPO,
"REPO: reading policy from network: {0}/{1}/{2}",
REPO_NAMESPACE,
globalPrefix,
REPO_POLICY);
ContentName policyName = BasicPolicy.getPolicyName(globalPrefix);
// We can't use the regular repo handle for this because we need ndnd to communicate across the
// faces
NDNHandle readHandle;
readHandle = NDNHandle.open(_km);
PolicyObject policyObject = new PolicyObject(policyName, readHandle);
try {
return policyObject.policyInfo();
} catch (ContentNotReadyException cge) {
} finally {
readHandle.close();
}
return null;
}