@Override
public HttpServerAuthenticationMechanism createAuthenticationMechanism(
String mechanismName, Map<String, ?> properties, CallbackHandler callbackHandler) {
for (Provider current : providers.get()) {
Set<Service> services = current.getServices();
if (services != null) {
for (Service currentService : services) {
if (SERVICE_TYPE.equals(currentService.getType())) {
try {
HttpServerAuthenticationMechanismFactory factory =
(HttpServerAuthenticationMechanismFactory) currentService.newInstance(null);
HttpServerAuthenticationMechanism mechanism =
factory.createAuthenticationMechanism(mechanismName, properties, callbackHandler);
if (mechanism != null) {
return mechanism;
}
} catch (NoSuchAlgorithmException e) {
log.debug(e);
}
}
}
}
}
return null;
}
static Instance getInstance(String type, Class<?> clazz, String algorithm, String provider)
throws NoSuchAlgorithmException, NoSuchProviderException {
Service s = GetInstance.getService(type, algorithm, provider);
Exception ve = getVerificationResult(s.getProvider());
if (ve != null) {
String msg = "JCE cannot authenticate the provider " + provider;
throw (NoSuchProviderException) new NoSuchProviderException(msg).initCause(ve);
}
return GetInstance.getInstance(s, clazz);
}
static Instance getInstance(String type, Class<?> clazz, String algorithm)
throws NoSuchAlgorithmException {
List<Service> services = GetInstance.getServices(type, algorithm);
NoSuchAlgorithmException failure = null;
for (Service s : services) {
if (canUseProvider(s.getProvider()) == false) {
// allow only signed providers
continue;
}
try {
Instance instance = GetInstance.getInstance(s, clazz);
return instance;
} catch (NoSuchAlgorithmException e) {
failure = e;
}
}
throw new NoSuchAlgorithmException("Algorithm " + algorithm + " not available", failure);
}
/**
* Update the active spi of this class and return the next implementation for failover. If no
* more implemenations are available, this method returns null. However, the active spi of this
* class is never set to null.
*/
private KeyPairGeneratorSpi nextSpi(KeyPairGeneratorSpi oldSpi, boolean reinit) {
synchronized (lock) {
// somebody else did a failover concurrently
// try that spi now
if ((oldSpi != null) && (oldSpi != spi)) {
return spi;
}
if (serviceIterator == null) {
return null;
}
while (serviceIterator.hasNext()) {
Service s = serviceIterator.next();
try {
Object inst = s.newInstance(null);
// ignore non-spis
if (inst instanceof KeyPairGeneratorSpi == false) {
continue;
}
if (inst instanceof KeyPairGenerator) {
continue;
}
KeyPairGeneratorSpi spi = (KeyPairGeneratorSpi) inst;
if (reinit) {
if (initType == I_SIZE) {
spi.initialize(initKeySize, initRandom);
} else if (initType == I_PARAMS) {
spi.initialize(initParams, initRandom);
} else if (initType != I_NONE) {
throw new AssertionError("KeyPairGenerator initType: " + initType);
}
}
provider = s.getProvider();
this.spi = spi;
return spi;
} catch (Exception e) {
// ignore
}
}
disableFailover();
return null;
}
}
@Override
public String[] getMechanismNames(Map<String, ?> properties) {
Set<String> mechanismNames = new LinkedHashSet<>();
for (Provider current : providers.get()) {
Set<Service> services = current.getServices();
if (services != null) {
for (Service currentService : services) {
if (SERVICE_TYPE.equals(currentService.getType())) {
try {
String[] serviceMechNames =
((HttpServerAuthenticationMechanismFactory) currentService.newInstance(null))
.getMechanismNames(properties);
Collections.addAll(mechanismNames, serviceMechNames);
} catch (NoSuchAlgorithmException e) {
log.debug(e);
}
}
}
}
}
return mechanismNames.toArray(new String[mechanismNames.size()]);
}